0.1.0 2007-03-09  Gregory Nutt <gnutt@nuttx.org>

	* Initial Release
	* Support for Linux user mode simulation and TI
	  TMS320C5471 (Arm7) provided

0.1.1 2007-03-14  Gregory Nutt <gnutt@nuttx.org>

	* Corrected an error in interrupt level context switching
	  for C5471
	* Added fgets() and gets() logic; verified c5471 console read.
	* Corrected error in reading from the C5471 serial port:
	  Improper use of semaphore can cause deadlock.
	* Fixed an error in the memory cleanup:  The idle task
	  cannot take semaphores (because it must always be ready
	  to run).
	* Tasks can now accept a configurable maximum number of
	  input parameters (argc)
	* _task_init() was divided into separate functions that
	  require fewer parameters.  This was necessary to keep
	  the stack usage down for the 8051/2 (which has only
	  256 bytes of stack).
	* Attempts to use C5471 console from interrupt handlers
	  can cause errors. Added a special path for this case.
	* Refuse calls to sem_wait and sem_trywait from interrupt
	  handlers.  This was happening because interrupt handlers
	  were calling printf-like functions.
	* Added strtok() and strtok_r()
	* Added a simple shell called nsh (see examples/nsh).
	* Platform support for 8052 is complete but not stable
	  when the timer interrupt is enabled.  Seems to be an
	  issue when SP enters indirect address space.
	* Documentation updates

0.1.2 2007-03-19  Gregory Nutt <gnutt@nuttx.org>

	* Add dirent.h, opendir(), readdir(), closedir(), etc.
	* Add strerror()
	* Added 'ls' command to nsh
	* Added C5471 watchdog driver
	* Fixed another bug where free() is called from IDLE task.
	  Can't do this; the caller must be able to wait for access
	  to memory.
	* Fixed bugs associated with debug output:
	  Cannot do dbg() in middle of context switch logic.
	  because it may require use of semaphores and cause
	  additional context switches. lldbg() is safe.
	* Interrupt must be disabled throughout all context switches.
	* Separated C5471 serial driver; a shareable part is
	  in drivers/. ; the C5471 specific part is in arch/C5471.
	  serial.h defines the interface.
	* Fixed mq_receive() and mq_send(): bad memcpy()
	* Fixed C5471 signal deliver logic: use of dbg() and
	  other actions by use signal handler can alter errno.
	  need to protect errno during signal handling.
	* Fixed uninitialized variable in filesystem that could
	  cause various problems
	* Added a test for roundrobin scheduler.

0.2.1 2007-03-22  Gregory Nutt <gnutt@nuttx.org>

	* Fix error in handing signed decimal in vsprintf().
	* Major restructuring of header files to get closer to
	  POSIX compliance.
	* Eliminate compilation warnings that crept into recent check-ins
	* Add kill()
	* Added support for POSIX timers
	* Some Documentation updates
	* Added support for the Neuros OSD / DM320

0.2.2 2007-03-26 Gregory Nutt <gnutt@nuttx.org>
	* Created the configs/ directory; separated board configuration
	  from processor architecture logic
	* Add memory leak detection test to examples/ostest
	* Corrected memory leak in OS pthread join logic
	* Corrected memory leaks in examples/ostest due to failures
	  to join or detach from pthreads.
	* Added pthread_once(), pthread_kill(), pthread_sigmask()
	* Added pthread_barrierattr_*() APIs
	* Added pthread_barrier_init(), pthread_barrier_destroy(), and
	  pthread_barrier_wait();
	* Added pthread barrier test
	* Added protection so that errno cannot be modified from
	  interrupt handling.
	* sched_setparam(), sched_setscheduler() now correctly set
	  errno; pthread_setscheduler() now returns the correct errno.
	* Added pthread_setschedprio().
	* Added directories to hold board-specific header files
	* Added directories to hold board-specific drivers

0.2.3 2007-03-29 Gregory Nutt <gnutt@nuttx.org>

	* mq_receive and mq_send now return errno's appropriately
	* mq_receive and mq_send are now correctly awakened by signals.
	* Fixed an unmatched sched_lock/unlock pair in task_delete().
	* sched_lock must be called in _exit() because operation of
	  task_delete() can cause pending tasks to be merged and a
	  context switch to occur.
	* Added mq_timedreceive() and mq_timedsend()
	* signal mask is now inherited by both child tasks and threads.
	* Improved sharebility of stdout among pthreads (only).  Nothing
	  was broken, but by moving the mutual exclusion logic to a
	  higher level, the printf output is more readable.
	* Fixed a bug in file system cleanup:  A list was being deleted
	  before the buffers contained in the list.
	* Fixed a bug in the wait-for-message-queue-not-empty logic.
	* Added a test of timed mqueue operations; detected and corrected
	  some mqueue errors.
	* Identified and corrected a race condition associated with
	  pthread_join.  In the failure condition, memory was being
	  deallocated while still in use.

0.2.4 2007-04-28 Gregory Nutt <gnutt@nuttx.org>

	* Verified c5471 build under Cygwin on WinXP
	* Makesystem changes to better support different SoCs.
	* Made arch/c5471/include and arch/dm320/include identical in
	  preparation for merging into arch/arm
	* Logic from arch/c5471 and arch/dm320 combined into arch/arm.
	  arch/c5471 and arch/dm320 are deprecated and will be removed
	  when the new c5471 and dm320 logic is verified.

0.2.5 2007-05-19 Gregory Nutt <gnutt@nuttx.org>

	* Corrected some build/configuration issues introduced with the
	  last release.
	* Added support for the NXP 214x processor on the mcu123.com lpc214x
	  development board (untested)
	* Added support for block devices.
	* Simulated target now exports a VFAT filesystem
	* Begin support for VFAT filesystem (missing functionality)
	* Added mount() and umount()
	* Fix bug in memcmp return value
	* Fix errors in timeslice calculation (several places)
	* Added missing irqrestore() in timer_deleteall().
	* close() was not closing the underlying device.
	* Added fsync()
	* Added strspn() and strcspn()

0.2.6 2007-05-26 Gregory Nutt <gnutt@nuttx.org>

	* Added unlink(), mkdir(), rmdir(), and rename()
	* Fixed several serious FAT errors with oflags handling (&& instead of &)
	* Added FAT support for unlink(), mkdir(), rmdir(), and rename
	* Added FAT support for opendir(), closedir(), readdir(), seekdir(),
	  telldir(), rewindir().
	* Fixed ARM compilation errors introduced in 0.2.5 (that is what I get
	  for only testing on the simulation).

0.2.7 2007-06-09 Gregory Nutt <gnutt@nuttx.org>

	* Added stat() to fs layer and to FAT
	* Fixed reference counting errors associated with mounted filesystems
	* Added fat_getattrib() and fat_setattrib()
	* Added statfs() to fs layer and to FAT
	* Correct file name extension in tools/zipme.sh
	* Fix error in dependencies in 8051/2 Makefile
	* sched/Makefile: Don't build sleep() or usleep() if signals are disabled
	* sched/sched_setparam.c: Remove redundant disabling of interrupts
	* sched/usleep.c: Fixed nsec calculation
	* lib/lib_strcspn.c: Function incorrectly named strspn().
	* examples/ostest/main.c:  Errors in SDCC version of a memcpy() call
	* examples/ostest/sighand.c: Don't call fflush() if streams are disabled
	* include/limits.h, include/time.h, sched/clock_internal.h: A support for
	  using selectable system timer frequency.
	* Fixed error in mountpoint related conditional compilation introduced
	  in 0.2.5
	* Restructured some Makefiles to better handle enabling and disabling
	  NuttX features without having so much conditional compilation in the
	  source files.
	* tools/mkconfig.c: No longer depends on asprintf() and _GNU_SOURCE and
	  so should now build in non-GNU, non-GLIBC environments.
	* include/nuttx/compiler.h: Fix for using SDCC with the Z80.
	* include/assert.h & arch/pjrc-8051/src/up_assert.c: SDCC does support
	  __FILE__and __LINE__ (not tested)
	* examples/ostest/barrier.c: Don't call usleep() when signals are
	  disabled.

0.2.8 2007-07-02 Gregory Nutt <gnutt@nuttx.org>
	* tools/Makefile.mkconfig: Under Cygwin, executable has a different name
	* tools/mkdeps.sh & arch/arm/src/Makefile: Corrected a problem makeing dependencies
	* tools/zipme.sh: Force directory name to be nuttx-xx.yy.zz
	* fs/fs_opendir.c: Correct errors in semaphore usage that can cause deadlock.
	* lib/lib_getopt.c: Added getopt() support
	* examples/nsh/:  NSH now supports cat, mount, umount, and mkdir.  ls supports
	  -l -s, and -R
	* Added basic OS support to manage environment variables:  environment
	  storage, cloning on task creation, sharing on pthread creation, destruction
	  on thread/task exit.
	* Add environment variables APIs:  environ, getenv, putenv, clearenv, setenv,
	  unsetenv
	* Correct an error in realloc() when the block is extended "down" in memory.
	  In this case, the old memory contents need to be copied to the new location
	  and an allocated bit was not being set.
	* examples/ostest/: Added an environment variable test.
	* examples/nsh/: Break into several files.
	* lib/: Added strrchr, basename, dirname
	* examples/nsh/: Add cp, rm, rmdir, set, unset commands. echo will now print
	  environment variables.

0.3.0 2007-11-06 Gregory Nutt <gnutt@nuttx.org>

	* Imported uIP into the tree (see
	   http://www.sics.se/~adam/uip/index.php/Main_Page)
	* Adding socket(), bind(), connect()
	* Added snprintf()
	* Added send() and sendto(); integrate write() and close() with socket descriptors.
	* Added recv() and recvfrom().
	* Added getsockopt() and setsockopt()
	* Documentation updated to address socket interfaces.
	* Implemented receive timeouts via setsockopt(SO_RCVTIMEO).
	* Provide support for multiple network devices
	* Implement socket ioctl() calls to set addresses
	* Added listen() and accept()
	* Added DM90x0 Ethernet driver
	* ARP timer is now built into the network layer
	* Basic client functionality verified: TCP socket(), bind(), connect(), recv(), send().

0.3.1 2007-11-19 Gregory Nutt <gnutt@nuttx.org>

	* Separated net/uip/uip.c into several functions in several files.
	* Corrected a TCP problem where packets were dropped because there was no
	  recv() in place but the packet was being ACKed.  There are still TCP
	  recv buffering issues, but this is part of a larger buffering issue.
	* Basic server functionality verified: TCP listen(), accept()
	* Fix DM90x0 driver problem that caused TX overruns
	* Add strncmp()
	* Added TCP/IP read-ahead buffer to minimize failed ACKs and packet loss.

0.3.2 2007-11-23 Gregory Nutt <gnutt@nuttx.org>

	* Add strcat() and strncat()
	* Integrated uIP micro webserver
	* Corrected a serious bug in TCP queue management
	* Fix leak in socket close logic
	* Add TX notification to driver so that it can respond faster to
	  the availability of TX data.
	* Moved urgent data info into device structure.
	* TCP and ICMP protocols can now be disabled.
	* Added UDP test in examples/udp
	* Verified/debugged UDP socket(), bind(), sendto() and recvfrom() logic
	  using examples/udp
	* recvfrom() and accept() now correctly return the remote address.
	* Fixed computation error in ntohl().

0.3.3 2007-11-28 Gregory Nutt <gnutt@nuttx.org>

	* Removed unused uIP files
	* sched/, mm/, and net/ subsystem debug can not be selectively enabled/disabled
	* Correct socket close logic: needs to disconnect TCP socket on close
	* uIP webserver now seems to be fully functional
	* fs/ and lib/ subystem debug can not be selectively enabled/disabled
	* Added vsnprintf
	* Integrated uIP telnetd
	* Add missing logic to read-ahead buffer logic
	* examples/nettest uses larger buffers
	* Improved ACK handling in send() to better handler deferred acknowledgements
	  and polling intervals.  Greatly improves send performance.

0.3.4 2007-12-10 Gregory Nutt <gnutt@nuttx.org>

	* Added and partially verified DHCP server logic (netutils/dhcpd)
	* Fix BROADCAST=y compilation problems
	* Fix UDP recvfrom timeout bug
	* Correct processing of input UDP broadcast packets.
	* Verfied basic DHCP client functionality (netutils/dhcpc)
	* Implemented send() timeout logic
	* Added and verified a TELNETD front end to NSH (examples/nsh)
	* Add a skeleton Ethernet device driver (drivers/net/skeleton.c)
	* Added C5471 Ethernet device driver (arch/arm/src/c5471/c5471_ethernet.c)
	* Found and fixed several problems in uIP when compiled for ARM with optimization.

0.3.5 2007-12-18 Gregory Nutt <gnutt@nuttx.org>

	* Added inet_ntoa() and ether_ntoa()
	* Added netdev_foreach() to support traversal of registered network devices
	* Added support for 'ifconfig' command to NSH (examples/nsh)
	* Moved MAC and Ethernet definitions to net/ethernet.h
	* Fix sim and DM90x0 compilation errors introduced in 0.3.4
	* Fixed errors in C5471 configuration files for examples/uip
	* Modified DHCPC (netutils/dhcpc) so that it should work in environments where
	  there are more than one DHCPD server.
	* NSH ifconfig command now shows uIP status as well (examples/nsh)

0.3.6 2008-01-06 Gregory Nutt <gnutt@nuttx.org>

	* Changes for use with SDCC compiler
	* Added a simulated z80 target
	* Fix deadlock errors when using stdio but with no buffering
	* Add support for Pascal P-Code interpreter

0.3.6.1 2008-01-07 Gregory Nutt <gnutt@nuttx.org>

	* The initial 0.3.6 release including an error that prevented
	  building successfully if the Pascal add-on was
	  was not present.

0.3.7 2008-01-31 Gregory Nutt <gnutt@nuttx.org>

	* Added support for the Zilog Z16F using the Zilog Z16F2800100ZCOG
	  Development Kit.
	* Add support toolchains that do not support making of dependencies
	* Fix Cygwin build with spaces in directory names
	* Name make system changes to deal with non-GNU toolchains (i.e., Zilog)
	* Add support for Windows native toolchains that cannot follow Cygwin soft links
	* Modified serial driver interface to handle hardware with non-16550A-like
	  interrupt architecture (like the Z16F)
	* Added a "dumb" serial console driver to simplify OS bringup
	* Corrected a bug that caused the errno value of one task to be clobbered
	  when a different task exits.	Affects all architectures.

0.3.8 2008-02-10 Gregory Nutt <gnutt@nuttx.org>

	* Added a test case to verify the Pascal P-Code interpreter
	* Added /dev/zero
	* 'errno' is now defined to be *get_errno_ptr() with no name conflicts
	* Added lseek() and fseek()
	* Integrated Pascal interpreter test case on the simulation platform.  Needs
		  pascal-0.1.1.
	* Add Pascal test case on the z16f platform.  Needs pascal-0.1.2 (does not
		  yet work due to some tool issues).
	* C buffered I/O fixes:
	  - Fix fflush() return value,
	  - Add correct fflush behavior when the FILE argument is null.
	  - Add logic to a correctly handle read/write access on the same FILE
	  - fseek() flushes read/write data when before moving the file pointer
	  - When read data is flushed, reposition the file pointer to account for
		buffered, but unread data
	* Pascal P-Code files are now standardized to big-endian for portability
	* Fix a build problem with z80 and SDCC 2.7.0 (format of a map file changed)
	  (see bug 1887170)
	* Pascal P-Code runtime now compiles with the SDCC toolchain.
	* Added a generic CAN driver.  This driver is untested as of this writing.
	* Corrected DM320 UART configuration problem

0.3.9 2008-03-09 Gregory Nutt <gnutt@nuttx.org>

	* Began adding support for the ZiLOG Z8Encore! microcontroller for the Z8Encore000ZCO
	  development board and the Z8F6403 part.
	* Fix broken 'clean' target on z80sim configurations
	* Re-structure arch/z80 to provide support for all ZiLOG 8-bit microcontrollers (ez8
	  in particular for now).
	* Add support for TRS80-Model 3 based on the xtrs emulation (http://www.tim-mann.org/xtrs.html)
	  Per patch from Jacques Pelletier.
	* In all shell scripts, change #!/bin/sh to #!/bin/bash to resolve problems in
	  Ubuntu where /bin/sh is a link to dash.
	* Z8Encore! port verified on ZDS-II instruction set/chip simulator.

0.3.10 2008-05-15 Gregory Nutt <gnutt@nuttx.org>

	* Add support for the ZiLOG EZ80Acclaim microcontrooler (EZ80F91 chip).
	* Add configuration for the ZiLOG z8f64200100kit development kit, Z8F6423 part.
	* Add configuration for the ZiLOG ez80f0910200kitg development kit, EZ80F091 part.
	* Correct critical list handling errors in task shutdown logic: One in timer
	  deletion logic (timer_delete.c) and one in stream logic (lib_init.c) reported
	  by kwonsk.

0.3.11 2008-06-01 Gregory Nutt <gnutt@nuttx.org>

	* Add support for recursive mutexes.
	* Eliminate a memory leak: contained watchdog instance was not being
	  deleted with a POSIX timer was deleted reported by kwonsk.
	* Eliminate a deadlock condition in opendir() reported by kwonsk.
	* Fix several FAT filesystem problems reported by kwonsk (Changes not yet
	  verified).
	* Host simulator no longer uses Linux system calls directly; Now works with Cygwin.
	* Fix an error that occurs when a POSIX timer is deleted by the timer signal handler.
	* Add logic to allow the examples/ostest to be run repetitively as an endurance test.
	* Add a ramdisk block driver

0.3.12 2008-08-10 Gregory Nutt <gnutt@nuttx.org>

	* Improved solution to POSIX timer lifetime controls bug fixed in 0.3.11.
	* Add test for recursive mutexes
	* Correct bug in recursive mutex logic
	* Add mkfifo()
	* Add pipe() and test for both pipes and fifos
	* Attempts to open a FIFO will now block until there is at least one writer
	* Add test/Fixed errors in FIFO reader/writer interlocks
	* Removed limitation: task_create() was only dup'ing 3 file descriptors (now
	  dups all open file descriptors).
	* Added a test for redirection of stdio through pipes
	* Fixed error in dup and dup2: Must call open/close methods in fs/driver so that
	  driver can correctly maintain open reference counts.
	* Same issue on closing file descriptors in exit()
	* Fixed in error in stdio flush logic.	Needed ssize_t vs size_t for error
	  check.
	* Moved all FAT related files from fs to fs/fat
	* Implemented mkfatfs(), a non-standard API to create a FAT filesystem on a
	  block device (not yet tested).
	* Added a test for mkfatfs() on a RAM disk in examples/mount and verified
	  basic mkfatfs functionality for FAT12.

0.3.13 2008-09-01 Gregory Nutt <gnutt@nuttx.org>

	* NSH: Added mkfatfs, mkfifo, sleep, usleep and nice commands
	* Fixed problem with console input in Cygwin-based simulator; NSH now works
	  with simulator.
	* NSH will now execute commands in background
	* sched_get_priority_max/min returned error on SCHED_RR
	* Removed duplicate getenv() implementation in /lib
	* Correct detection of End-of-File in fgets
	* NSH: Implemented sh and crude script handler
	* Fix prototype of read() and write(). Need to use ssize_t and size_t, not
	  int and unsigned int.
	* NSH now supports redirection of command output
	* NSH can now use both telnet and serial front ends together
	* NSH: $variable can be used for any command value
	* Fixed an error in opendir() that could cause an assertion to fail
	  inappropriately.
	* Correct an error in the FAT that caused files opened for writing with
	  O_APPEND to fail.  The file was not being properly positioned to the
	  end of the file in that case.
	* NSH now supports last exit status $?
	* NSH now supports if-then[-else]-fi construct
	* NSH now supports comments beginning with '#'
	* NSH now supports commands to inspect and modify memory
	* NSH cat command now supports multiple files on command line
	* Add chdir() and getcwd()
	* Fix error in getopt() when called with argc==1
	* Fix error in stat() when used on the root directory
	* NSH: Add cd and pwd commands and current working directory to all NSH
	  commands that refer to paths.
	* Fix errors and warnings introduced into Linux sim build because of recent
	  Cygwin-based sim changes
	* NSH: Add mem command to display heap usage
	* Added telnet NSH configuration for Neuros OSD.
	* Basic integration of concurrent telnet/serial NSH functional on Neuros
	  OSD.
	* Fixed a critical bug that affects the way that environment variables are
	  shared amongst pthreads.
	* uIP port enhance to support multi-threaded, concurrent socket access.  So,
	  for example, one thread can be reading from a socket while another is
	  writing to the socket.

0.3.14 2008-09-08 Gregory Nutt <gnutt@nuttx.org>
	* FAT FS now uses position variable in struct file.  This simplifies operations
	  like ftell().
	* fseek() needs to discard bytes buffered by ungetc().
	* Corrected ftell() return value.
	* Added fsetpos() and fgetpos().
	* NSH: Now supports 'test' and '[' commands
	* Correct error in send() timeout logic.
	* Correct error in multi-threaded socket handling in send() and sendto().
	  Outgoing data could overwrite incoming data.
	* Add support to uIP for application access to ICMP protocol stacks; Add
	  ping request logic.
	* NSH: Add ping command
	* Correct IP checksum calculation in ICMP and UDP message send logic.
	* NSH: Created an HTML document and a more detailed README file describing NSH.
	* Added basic TFTP client logic (netutils/tftpc).
	* NSH: Add get and put commands to support TFTP get and put operations.
	* NSH: Added a mkrd command that will create a RAMDISK that can be formatted
	  and mounted.
	* Corrected a critical bug that prevent recvfrom from receiving packets from
	  any remote UDP port.
	* NSH: Add hexadecimal dump command (xd)
	* Fixed several critical bugs with regard to fat reading and writing and FAT12
	  accesses.  Basically the FAT FS only worked with my tiny test files and test
	  cases.  A lot of stronger FAT tested is needed!!
	* Fixed another FAT bug in implementation of FAT lseek; this prohibit correct
	  random access to large files.

0.3.15 2008-09-20 Gregory Nutt <gnutt@nuttx.org>
	* Added support for ROMFS filesystem.
	* Added a simple test the ROMFS filesystem (examples/romfs)
	* NSH: Use ROMFS to provide an option for a start-up script at /etc/init.d/rcS
	* Add definition of BIOC_XIPBASE ioctl and implement in RAM disk block driver.
	  This is a low level requirement for eXecute In Place (XIP) support.
	* Add a FIOC_MMAP to perform memory mapping of a file and implemented the
	  ioctl command in the ROMFS filesystem.  This is a requirement for eXecute
	  In Place (XIP) support.
	* Add mmap() API with restricted capability (only for XIP support)
	* Extend ROMFS test at /examples/romfs to verify mmap() and XIP support.
	* Add support for Intel Hex format output using objcopy
	* Completed the basic port of the NXP LPC2148 on the mcu123.com board.
	  The basic port includes successful booting, timer interrupts, serial console,
	  succesfully passing the examples/ostest, and a NuttShell (NSH) configuration.
	* ARM architectures now support drivers/lowconsole.c

0.3.16 2008-10-10 Gregory Nutt <gnutt@nuttx.org>
	* Added header files defining a common USB device controller architecture
	* Added USB device side driver for the LPC214x
	* Correct the frequency of system timer interrupts in the NXP LPC214x port
	  (off by 20x in nuttx-0.3.15)
	* Add an option to set aside a separate stack for interrupt handling (ARM only).
	  This is useful when memory is constrained, there are multiple tasks, and
	  the interrupt stack requirement is high (as when USB is enabled).
	* Added USB serial class device side driver (emulates Prolific PL2303
	  serial-to-USB adaptor)
	* Add LPC214x USB serial configuration; Add examples/usbserial test
	* Added USB device side driver for the DM320 (untested at initial release)
	* Fixed an error in a previous (post 0.3.15) check-in that broke the LPC214x
	  system timer.
	* Fixed serial driver bugs related to (1) open counts and (2) recognizing
	  O_NONBLOCK on read.
	* Fixed an error in read(); it was not setting the errno on errors returned
	  from the driver.

0.3.17 2008-10-28 Gregory Nutt <gnutt@nuttx.org>
	* Incorporate patch "[2164503] nuttx-0.3.16 does not build for ARM with USB disabled"
	* Reduced the amount of memory reserved for USB serial control requests.  It
	  was unnecessarily large.
	* Added LPC214x SPI1 driver to interface with MMC on mcu123.com board.
	* Added a simple SPI-based MMC/SD block driver
	* NSH: Add LPC214x-specific support to NSH; NSH now mounts any SD cards in the slot.
	* FAT: Fix access to unaligned 32-bit values in partion table (start sector & size)
	* Fixed a problem with a un-initialized variable in the USB serial driver.
	* Added USB storage NXP LPC214x configuration
	* Added a test for USB storage under examples/usbstorage
	* Fixed a bug in the LPC214x USB driver: It was not properly clearing a HALTed
	  endpoints (other than EP) on receipt of CLEAR FEATURES request.
	* Added USB storage class device side driver (BBB)
	* Fixed a bug in the LPC214x USB driver: It was not properly handling request buffers
	  larger then the endpoint's max packet (DM320 driver also fixed, untested)
	* Added logic to the USB device interface:	A bit is needed to force the driver to
	  to terminate an IN transfer with a short packet (zero-length if necessary).
	* Fix an error in the NXP LPC214x USB device driver that was causing corruption of
	  the request queue (M320 driver also fixed, untested)
	* Correct another error in the NXP LPC214x USB device driver that caused read failures
	  when the request buffer size was larger than maxpacket.
	* Numerous corrections/extensions to the USB tracing logic included in 0.3.16 (but
	  not integrated until 0.3.17)
	* Fixed another bug in the NXP LPC214x USB device driver:  After a stalled endpoint
	  is resumed (view CLEAR FEATURE), we must restart the IN (outgoing) queue.

0.3.18 2008-11-16 Gregory Nutt <gnutt@nuttx.org>
	* Added port for the STMicro STR71x processor and configuration for the Olimex STR-P711
	  board (STR71x testing is stalled because I have been unable to get OpenOCD to
	  communicate with my JTAG wiggler on Linux).
	* Fix race condition workaround delay in LPC214X SPI logic.  This was also the cause of the
	  very bad MMC/SD performance.
	* Began port of the Hitachi SH-1 using the SH-1/US7032EVB1 board
	* Re-built all configurations that use SDCC and Zilog toolchains to make sure they still
	  build (they didn't, but they do now).
	* Fixed several erroneous "list empty" checks in the CAN driver.
	* Hitachi SH-1 passes (reduced) examples/ostest; the examples/nsh test still fails.
	  There are remaining instabilities that make the port un-usable.  The nature of these is
	  not understood; the behavior is that certain SH-1 instructions stop working as advertised.
	  This could be a silicon problem, some pipeline issue that is not handled properly by the
	  gcc 3.4.5 toolchain (which has very limit SH-1 support to begin with), or perhaps with the
	  CMON debugger.  At any rate, I have exhausted all of the energy that I am willing to put
	  into this cool old processor for the time being.
	* Renamed configuration item CONFIG_PROC_STACK_SIZE as CONFIG_IDLETHREAD_STACKSIZE:  It now
	  only controls the size of the stack for the IDLE thread.	Added CONFIG_USERMAIN_STACKSIZE:
	  This is the size of stack used with the user_start() thread is created.  The two stacks
	  no longer have to be the same.
	* Add a loop device that converts a file into a block device.
	* Each NSH command can not be disabled through a configuration setting. All of these
	 settings make the configuration of NSH potentially complex but also allow it to squeeze
	  into very small memory footprints.
	* Added a block to character (BCH) driver.	This is kind of the reverse of the loop
	  device; it allows you access a block device like a character device.
	* Added strcasecmp() and strncasecmp()
	* NSH: Added the 'dd' command
	* NSH: Added the 'losetup' command
	* Fixed a FAT bug:	After recent changes, it would mount a (invalid) FAT file system
	  even if the medium is not formatted!
	* Corrected two important errors in FAT lseek implementation: (1) the sectors-per-cluster
	  value was being reset to "1" and (2) important lseek logic was omitted when the seek
	  position was zero.
	* Fixed a bug in getopt().	It would fail if on certain combinations of terminal argument
	  types.

0.3.19 2008-11-26 Gregory Nutt <gnutt@nuttx.org>
	* Add poll() and select() APIs (in the initial check-in, these work only with character devices)
	* Add poll() methods to /dev/null, /dev/zero, pipes, fifos, and serial drivers.
	* Add examples/poll for testing poll() and select()
	* Fix hostile behavior of getc, fgetc, getchar, etc.: the serial driver was waiting for a
	  full buffer of read data before return.  This means that getc would stall when it needed
	  to refill the input buffer. The old behavior (read full blocks) might be useful in other
	  contexts, so it is still available within the driver as a configuration option.
	* Implement poll() and select() support for TCP/IP sockets
	* Fixed an important bug in the TCP/IP buffering logic.  When TCP/IP read-ahead is enabled
	  and not recv() is in-place when a TCP/IP packet is received, the packet is placed into
	  a read-ahead buffer.	However, the old contents of the read-ahead buffer were not being
	  cleared and old data would contaminate the newly received buffer.
	* Implemented support for connection backlog.  The size of the backlog is specified by the
	  second argument of the standard listen() API.  Hooks are provided to support poll()/select()
	  waiting for connections, with a subsequent call to accept() to use the backlogged connection.
	* Fixed a minor bug in accept().  It should allow the address and addresslen values to be NULL
	* Added first-cut definition for a framebuffer interface (and simulated framebuffer for testing
	  purposes only)
	* Added fixed precision math support
	* Added some color converson routines into what may become a real graphics library someday.
	* Added a framebuffer driver for the DM320 (untested on initial check-in)
	* Network:  Add support for outgoing multicast addresses
	* Added some rasterizers to the graphics library

0.4.0 2008-12-06 Gregory Nutt <gnutt@nuttx.org>
	* Initial release of a tiny windowing system for NuttX
	* Add fixed precision sin() and cos() (not well tested at initial check-in)
	* Add an X11-based simulated framebuffer driver
	* The simulated target now has an option (CONFIG_SIM_WALLTIME) that will let the simulation
	  run in more-or-less realtime.
	* Added more extensive window support:  frames, toolbars, etc.
	* Added support for bitmap fonts
	* Integrated the new font support with a font test in examples/nx
	* Add documentation for NX graphics subsystem

0.4.1 2009-02-06 Gregory Nutt <gnutt@nuttx.org>
	* Added board support for the ZiLog eZ80Acclaim! ez80f910200zco Development Kit.
	* Fixed several compilation errors in fixed precision math library when built
	  against toolchains that do not support 64-bit type 'long long'.
	* Fix errors in some function prototypes in dirent.h
	* Add eZ80F91 EMAC driver
	* Fix recvfrom() compilation error: only noted under ZDS
	* Updated all ARM Make.def files to work with gcc 2.4.2 (However, there are
	  still some build issues associated with that toolchain in use of arm-elf-objcopy
	  -- see the TODO.txt list for details)
	* Fix problems with Z16F and eZ80 compilation introduced with recent changes.

0.4.2 2009-02-28 Gregory Nutt <gnutt@nuttx.org>

	* M16C: Add support for the Renesas M16C MCU and the SKP16C26 StarterKit. However,
	  the target cannot be built because the GNU m16c-elf-ld link fails with
	  the following message:

		m32c-elf-ld: BFD (GNU Binutils) 2.19 assertion fail /home/Owner/projects/nuttx/buildroot/toolchain_build_m32c/binutils-2.19/bfd/elf32-m32c.c:482

	  Where the reference line is:

		/* If the symbol is out of range for a 16-bit address,
		   we must have allocated a plt entry.	*/
		 BFD_ASSERT (*plt_offset != (bfd_vma) -1);

	  No workaround is known at this time.	This is a show stopper for M16C.

	* eZ80Acclaim!: Fix interrupt vectors positioning; they were being positioned
	  wrong by 64 bytes (Kevin Franzen).
	* eZ80Acclaim!: Corrected some stack handling errors during interrupt handling
	   context save and restore (Kevin Franzen).
	* eZ80Acclaim!: Corrected vector initializeation logic (Kevin Franzen).
	* eZ80Acclaim!: Corrected overflow problem in the calculation of UART baud rate
		divisor, the system timer divisor, and the EMAC poll timer.
	* eZ80Acclaim!: Fixed GPIO pin configuration get serial output
	* eZ80Acclaim!: Correct stack overflow in ostest example configuration
	* eZ80Acclaim!: Fixed restoration of interrupts state on interrupt level context swith.

0.4.3 2009-03-04 Gregory Nutt <gnutt@nuttx.org>

	* z8Encore! and eZ80Acclaim!: Fixed the serial driver initialization sequence
	* eZ80Acclaim!: Fixed error in vector table:  Missing space set aside for the
	  "unused" vectors.  As a result, all vectors above timer4 were skewed.
	* eZ80Acclaim!: Fixed logic error in UART interrupt handler.
	* Many fixes in FAT file system and in NSH for correct compilation with ZDS-II
	* eZ80Acclaim!: Added and verified a NuttShell (NSH) configuration.
	* eZ80Acclaim!: Correct endian-ness; defconfig files said BIG endian.
	* Restructured parts of the uIP port for correct compilation with ZDS-II
	* eZ80Acclaim!: Complete basic integration of the eZ80F91 EMAC driver.	The
	  driver is basically functional and should mature prior to the 0.4.3 release.
	* Implemented priority inheritance logic for POSIX semaphores.	Because the pthread
	  mutexes are built on semaphores, they will have this property as well.

0.4.4 2009-03-29 Gregory Nutt <gnutt@nuttx.org>

	* examples/nsh:  A debug option was left on that can (and does) cause
	  infinite loops and stack overflows.
	* net/uip: Correct calculation of checksum on ICMP ping response.
	* examples/dchpd: Added a tiny DHCP server example
	* net/uip: Correct UDP bind behavior.  It should select a valid port number
	  if it receives a port number of zero.
	* netutils/dhcpd:  correct for ZDS compiler.  Fix issue with re-use of a
	  port number. Fixed a number of broadcast-related problems.
	* eZ80Acclaim!: Add a tiny webserver configuration
	* eZ80Acclaim!: Fixed an important bug in the EMAC Tx timeout logic. It was
	  always timing out when the load was heavy and worse, for some reason,
	  resetting the Tx function caused unexpected registers to be reset in
	  the Rcv function was well.
	* Z80: Patch incorported: "[2696648] Z80: interrupt flag stored in parity bit"
	  (submitted by JPelletier).  The is the same fix that was needed for the
	  eZ80 and fixed in 0.4.2.
	* netutils: Added logic to support a simple wget() function
	* examples/wget: Added a test for wget() (untested -- see NOTE)
	* lib/strncasecmp: Fix cut'n'paste error in function name.
	* NSH: Added wget command (untested -- see NOTE).
	* examples/sendmail: A simple sendmail example (untested -- see NOTE)

	NOTE: Features related to wget and sendmail are not tested on the target platform
	in this release and, hence, most likely have problems.	I don't have the correct network
	setup to perform that testing now (I'm in a hotel).

0.4.5 2009-04-19 Gregory Nutt <gnutt@nuttx.org>

	* Add an enumeration argument to the SPI chip select and status methods so
	  that the interface can handle more than one device.
	* eZ80Acclaim!: Add a generic SPI driver for all eZ80 boards.
	* Add a setmode() method to the SPI interface to handle parts with differing
	  mode requirements.
	* include/nuttx/i2c.h: Defined a standard I2C interface
	* eZ80Acclaim!: Add an I2C driver.
	* eZ8Encore!: Add an I2C driver.
	* Add support for the Freescale i.MX1/L architecture and a configuration for
	  the Freescale MX1ADS development board.
	* examples/helloxx: Added a simple C++ hello world example
	* include/css: Added std header files
	* libxx: New C++-only directory provides support for minimal C++ applications

0.4.6 2009-05-19 Gregory Nutt <gnutt@nuttx.org>

	* Change SPI interface so that is can accomodate interfaces where the
	  number of bits per word is greater an 8 (such as with many 9-bit display
	  interfaces). -- this might have broken a few things which will need to
	  be retested!
	* arch/arm/src/imx: Added i.MX SPI driver
	* SPI: Add a method to set the number of bits per word.  Also add an
	  alternative interface for so that (eventually) I can phase the sndblock
	  and recvblock methods and replace them with a single exchange method
	* Build:  objcopy fails with toolchains that use newer GCC and binutils.  The
	  following arguments need to be included in the objcopy command line "-R .note
	  -R .note.gnu.build-id -R .comment"  This has been fixed in arch/arm/src/Makefile,
	  but other architectures may have the same problem.  Thanks to Dave Marples
	  for verifying this.
	* configs/eagle100/ostest: Added support for the MicroMint Eagle100 board.
	  This board has a Luminary LM3S6918 Cortex-M3. Added a configuration to build
	  examples/ostest.
	* arch/arm/src/lpc214x: Add configuration option to enable fast GPIO (vs.
	  legacy, "slow" GPIO) for LPC214x.
	* arch/arm: Restructured the arch/arm directory structure to better support ARM
	  and Cortex-M3.
	* sched/: pthread_create() must return a (non-negated) errno value on failure.
	* configs/eagle100/nsh: Add a NuttShell (NSH) configuration for the Eagle-100

0.4.7 2009-05-29 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/lm3s: Added an Ethernet driver for the LM3S6918
	* configs/eagle100/nettest: Added an examples/nettest configuration for the
	  Micromint Eagle100 board.
	* Documentation/NuttxPortingGuide.html: Added a section on NuttX device drivers.
	* configs/eagle100/httpd: Added an examples/uip configuration for the
	  Micromint Eagle100 board.
	* arch/arm/src/lm3s: Added an SSI driver for the LM3S6918
	* examples/nsh: Added MMC/SD support for the LM3S6918
	* arch/arm/src/lm3s: Fix logic for setting and clearing output GPIOs (critical
	  fix!).
	* drivers/mmcsd: Found numerous errors in current MMC/SD SPI driver.  Bad frequency
	  calculation based on CSD settings, inappropriate timeouts, odd code that looks like
	  a bad search and replace.  Also needs support for SDHC ver 2.x.  New MMC/SD is
	  largely redesigned and probably non-functional in the first check-in.
	* drivers/mmcsd: Changes verified on 4Gb Kingston microSHDC card and on a 2Gb
	  SanDisk microSDC card on the Eagle100 platform.
	* fs/fat: With the 4Gb card, the first tests of FAT32 were (finally) performed.
	  Found and corrected a problem that prevented use of FAT32: It was not updating
	  the sector cache before checking the FAT32 FSINFO sector.
	* configs/eagle100/*/Make.defs:  Added configuration options that should make
	  it possible to build NuttX for the Eagle100 using CodeSourcery 2009q1 toolchain
	  and the devkitARM GNU toolchain.
	* configs/mcu123-lpc214x/src: Corrected some logic in the LPC2148 SPI receive block
	  logic.  Re-verified SDC ver1.x support with 1Gb Toshiba SDC, 1Gb PNY SDC, and
	  4Gb Kingston SDHC.  There are CMD0 issues with the 2Gb SanDisk SDC on this board.
	* fs/fs_mount.c: Corrected error handling that could cause a deadlock on certain
	  mount() failures.

0.4.8 2009-06-13 Gregory Nutt <gnutt@nuttx.org>

	* lib/lib_*stream.c: Extend internal stream logic to support incoming streams.
	* arch/arm/src/str71x: Serial output is now correct and timer interrupts are
	  working.	The test at configs/olimex-strp711/ostest passes.  This means that
	  the basic STR-P711 port is complete.
	* configs/olimex-strp711/nsh:  Add and verified a NuttShell (NSH) configuration
	  for the STR-P711.
	* arch/arm/str71x/str71x_serial.c:	The STR711 interrupt driven serial driver
	  finally works after some extradinary measures to handle missed interrupts.
	  NSH is fully functional on the Olimex STR-P711 board.
	* example/nsh: Moved architecture specific files from NSH directory to board-
	  specific directories.
	* config/olimex-strp711/src/up_nsh.c:  Add an NSH board specific directory for
	  for the Olimex STR7P11 board.
	* Fixed build of LM3X6918 using the CodeSourcery Windows native toolchain.	There
	  were lots of issues with Cygwin paths and Cygwin symbolic links.	These changes
	  may work with the devarmKIT as well, but that remains untested.
	* The NXP LPC2148 and STR711 targets can now also be built using the CodeSourcery
	  or devkitARM Windows native toolchains.

0.4.9 2009-06-26 Gregory Nutt <gnutt@nuttx.org>

	* Add strtoll() and strtoull(); Add macros for atol() and atoll().
	* dup() and dup2() will now clone socket descriptors
	* All socket descriptors are now cloned when a new task is started via
	  task_create().
	* Add configuration options to suppress or eliminate cloning of file
	  and/or socket descriptors when a new task is started by task_create():
	  CONFIG_FDCLONE_DISABLE, CONFIG_FDCLONE_STDIO, CONFIG_SDCLONE_DISABLE.
	* Use of C++ reserved word 'private' in C header files causes problems
	  for C++ that include them.
	* Added 'binfmt' support to allow execution of programs in a file system,
	  binding to NuttX symbols. A custom format call NXFLAT is used; this
	  derives from http://xflat.sourceforge.net.  At present is supports on
	  XIP execution from ROMFS file systems.  Initial check-in is untested
	  and probably breaks many builds.
	* examples/lib: Added qsort()
	* examples/nxflat: Added support for symbol tables
	* Correct logic that creates compiler include paths.  On Cygwin, the
	  include paths for Cygwin-based GCC were being converted to windows
	  native paths.  That causes many problems -- breaking dependencies
	  for one.
	* Fixed an important bug in ROMFS.	The initial XIP offset was set
	  incorrectly so if sector zero was read first, there was a bad read.
	  I don't know how it worked before.
	* arch/arm/src/common/up_use_stack.c.  Fixed a fatal stack setup error.
	  This file has been around for a long time, but I don't think it has
	  every been used before (i.e., prior to the NXFLAT logic)

0.4.10 2009-08-08 Gregory Nutt <gnutt@nuttx.org>

	* lib/: Added some basic regex-subset, pattern matching functions
	* lib/: Greatly simplified mktime() and gmtime_r().  The Gregorian and
	  Julian time calculations were interesting, but not necessary in the
	  typical embeddd system.
	* sched/: Added gettimeofday().  This implementation is simply a thin
	  wrapper around clock_gettimer().
	* lib/: Add gmtime(), localtime(), and strftime()
	* binfmt/: Add exec().	This is just a wrapper that executes both
	  load_ and exec_module() in a more familiar manner.  It is not consistent
	  with more standard exec() functions, however, because (1) it returns
	  and (2) it requires symbol table arguments.
	* lib/: Add fileno()
	* examples/ostest: Several of the tests used a big, hard-coded stack size
	  when creating test threads (16K stacksize).	The stack size should
	  be controlled by the .config file or the OSTest won't work on platforms
	  with memory constraints.
	* netutils/thttpd: An initial port of Jeff Poskanzer's THTTPD HTTP server.
	  See http://acme.com/software/thttpd/.
	* examples/thttpd: A basic test program for THTTPD
	* configs/eagle100/thttpd: A build configuration for THTTPD on the Micromint
	  Eagle-100 LMS6918 (Cortex-M3) board.
	* configs/ntosd-dm320/thttpd: A build configuration for THTTPD on the Neuros
	  DM320 platform.
	* lib/: Added strstr() and strpbrk().
	* net/recvfrom.c and net/accept(): Sockets now support some non-blocking
	  operations, specifically for (1) TCP/IP read operations when read-ahead
	  buffering is enabled, and (2) TCP/IP accept() operations when TCP/IP
	  connection backlog is enabled.
	* fs/fs_fcntl.c and net/net_vfcntl.c: Minimal support provided for fcntl().
	  It can, at least, be used to mark sockets as blocking or non-blocking.
	* net/net_close.c: Fix bug in close().	If reference count not set to zero
	  then uip_tcpfree() will assert when DEBUG is enabled.
	* net/accept.c: Fix bug in accept().  The logic expected parts of the
	  return address structure to be initialized or it would return an error.

0.4.11 2009-09-16 Gregory Nutt <gnutt@nuttx.org>

	* fs/fs_read.c and fs/fs_write.c.  read() and write() to socket is the
	  same as recv() and send() with flags = 0.  Fixed!
	* net/recvfrom.c: Fix errors in return value from non-blocking socket read.
	* lib/lib_strcasecmp.c and lib/lib_strncasecmp.c.  Use of post-incremented
	  argument to macro caused strcasecmp() and strncasecmp() to fail.
	* lib/lib_strstr.c:  Length of substring off by one causes false alarm
	  sub-string matches.
	* arch/arm/src/lm3s/lm3s_ethernet.c: Fix errors in LMS6918 FIFO length
	  handling.  (1) The incorrect size of the Ethernet header was being
	  subtracted on outgoing messages (4 vs 14), which caused outgoing messages to
	  be a little too long.  (2) The size of incoming FIFO messages is 6 bytes
	  larger than it expected (2 for the length and 4 for the FCS).  The unhandled
	  extra two bytes of length cause the driver to sometimes read one too many
	  words from the received FIFO (corrupting the next queued receive packet,
	  if any).
	* net/net_poll.c and net/uip/uip_tcpbacklog.c.	Fixed an important race condition
	  bug in polling for connections.  The logic worked if the poll was inplace
	  before the connection was received; but the poll failed to awaken if the
	  connection was already pending in the backlog when poll() was called.
	* net/net_close.c.	Fixed another important TCP/IP race condition bug:	If
	  the host closes the TCP connection just before the target calls close(), then
	  the close operation may hang indefinitely!
	* net/net_tcppoll.c.  Removed an unnecessary check for outstanding, un-ACKed
	  data.  The NuttX socket layer keeps track of ACKs and doesn't need this check;
	  removing the check should improve write throughput
	* Add DEBUG configuration option to enable debug console output without disabling
	  optimization (and vice versa)
	* Changed lots of occurrences of debug macro dbg() to lldbg().  dbg() uses
	  stdout to output debug data.	That works fine unless (1) the dbg() macro
	  is interrupt logic and the interrupted task has redirected stdout!  Most
	  changes were in uIP.
	* net/uip/uip_tcpinput.c.  Connection reference count was not being set correctly
	  when a socket is created by accepting a new connection.  Since the reference
	  count is bad, such sockets are not successfully duplicated when being passed
	  to new tasks.
	* net/net_clone.c.	Similarly, after a socket is cloned, its reference count
	  was not being initialized.
	* lib/lib_strstr.c.  Improperly incremented pointer could cause comparison
	  failures.
	* net/.  Connection reference count must always be set to zero before calling
	  uip_tcpfree() or it could trigger a DEBUGASSERT that verifies that the
	  reference count is zero before freeing a connection structure.
	* net/uip/uip_listen.c.  uip_accept() consulted the wrong list to find the
	  listener on a socket.  The previous logic worked most of the time, but
	  occasionally picked the wrong listener.
	* net/net_close.c and net/net_sockets.c.  Sockets were not being closed
	  when a task exits.  If many server tasks are created and exit without closing
	  sockets (such as with CGI tasks), then eventually, you will run out of sockets.
	* netutils/thttpd.	Basic functionality of THTTPD is complete.	This includes
	  serving up files from a file system and executing NXFLAT-based CGI programs
	  and pipe the stdout back to the HTTP client.

0.4.12 2009-10-17 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32 and configs/stm3210e-eval.  Added basic support for the
	  STMicro STM32, Cortex-M3 MCU.  The specific port is to the STMicro STM3210E-EVAL
	  development board based around the STM32F103ZET6 MCU.
	* configs/stm3210e-eval/RIDE.  Added a basic STMicro RIDE7 project that can be
	  used to perform basic STM32 board bring-up (due to RIDE7 size limitations, it
	  cannot be used for the full NuttX bring-up).
	* configs/stm3210e-eval/ostest.  The STM32 now passes the basic NuttX OS test
	  at examples/ostest.  The rest should be a piece of cake.
	* configs/stm3210e-eval/nsh.  Added NuttShell (NSH) example.
	* configs/stm3210e-eval/src/stm32102e-internal.h.  Fix on-board LED GPIO definitions.
	* arch/arm/src/stm32/src/stm32/stm32_dma.c.  Added DMA channel support for the STM32
	* arch/arm/src/stm32/src/stm32/stm32_spi.c.  Added a DMA-based SPI driver for the STM32.
	* arch/arm/src/stm32/src/stm32/stm32_serial.c.	Finished interrupt-driven,
	  USART console driver.  This makes NSH work perfectly.
	* Things left to do for the STM32 deferred to the 0.4.13 release:  USB device driver,
	  LCD driver and NX bringup on the eval board's display and MicroSD support.  An SPI
	  driver was included in the 0.4.12 release, but is not yet tested.

0.4.13 2009-11-04 Gregory Nutt <gnutt@nuttx.org>

	* include/nuttx/mtd.h.	Added a simple interface definition to support some
	  FLASH, EEPROM, NVRAM, etc. devices.
	* driver/mtd/m25px.c.  Added a driver for SPI based FLASH parts M25P64 and M25P128.
	* configs/stm3210e-eval/usbserial.	Add a USB serial configuration for the STM32.
	  Depends on the STM32 USB driver.
	* arch/arm/src/cortexm3/up_switchcontext.S & up_svccall.c.	Made an improvement
	  to context switching.  There are two types of context switches:  interrupt
	  context switches and background/user context switches.  This change should
	  improve the performance of those background/user context switches by a factor
	  of about two.
	* arch/arm/src/stm32/:  Fix several typos in the serial logic.	It turns out
	  that these typose don't make any difference as long as you use only one
	  serial port and all uarts are configured the same.  But the typos are bugs
	  waiting to happen in any other configuration.
	* arch/arm/src/stm32/: You have to configure CTS/RTS function pins for USART
	  2 and USART 3 even if you are not using flow control.
	* arch/arm/src/stm32/stm32_usbdev.c: Added a USB device-side driver for the
	  STM32.  NOTE: This is an early release of the USB driver.  There is at least
	  one known issue. The examples/usbserial test only executes correctly under
	  certain conditions (see the full bug description in the TODO list).
	* arch/arm/src/stm32/stm32_rcc.c: Fixed an error in clock initialization.
	  On some boards (none of mine), the HSE (high speed external clock) delay
	  loop times out if the optimization level is high. The STM32 then falls
	  back to the HSI (internal clock), and the system clock is too slow by a
	  factor of 11.1%.	This was fixed by simply add the volatile storage class
	  to the timeout loop counter
	* arch/arm/src/stm32/stm32_irq.c: Fixed a critical bug in the interrupt
	  control logic.  The wrong register was being used for interrupts in a
	  certain range.  Worked fine until you try to use an interrupt in that
	  range!

4.14 2009-12-02 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32/stm32_gpio.c: Add support for configure an input GPIO
	  to generate an EXTI interrupt.
	* config/stm3210e-eval/src/up_buttons.c: Add support for on-board buttons.
	* include/nuttx/rwbuffer.h: Add generic support for read-ahead buffering
	  and write buffering that can be used in any block driver.
	* include/nuttx/wqueue.h: Added a generic worker thread that can used to
	  defer processing from an interrupt to a task.
	* include/nuttx/sdio.h: Defines a generic SD/SDIO interface can can be
	  bound to a MMC/SD driver to provide SDIO-based MMC/SD support.
	* drivers/mmcsd/mmcsd_sdio.c: Provides an SDIO-based MMC/SD driver.
	* arch/arm/src/stm32/stm32_sdio.c: Provides an STM32 implementation of
	  the SDIO interface defined in include/nuttx/sdio.h.
	* fs/fs_mount.c: Correct error handling logic.  If the bind() method
	  fails, then a reserved node is left in the tree.	This causes subsequent
	  attempts to mount at the location to fail (reporting that the node
	  already exists).	This is a problem for block drivers for removable
	  media: The bind method could fail repeatedly until media is inserted.
	* arch/arm/src/stm32/chip.h & stm32_dma.c: Fixed several definitions
	  that can cause compilation errors when DMA2 is enabled.
	* arch/arm/src/stm32/stm32_dma.c: Integrated and debugged STM32 DMA
	  functionality that was added in 0.4.12.
	* configs/stm3210e-eval/usbstorage: Add a configuration to exercise
	  the STM32 with the USB mass storage device class example
	  (examples/usbstorage).
	* configs/mcu123-lpc214x/up_usbstrg: Move LPC-specific code from
	  examples/usbstorage to configs/mcu123-lpc214x.
	* configs/stm321e-eval/up_usbstrg: Add STM32-specific logic for the
	  examples/usbstorage test.
	* arch/arm/src/stm32/stm32_usbdev.c: Fix bugs in STM32 USB device-side
	  driver:  (1) Need to disconnect after reset received, (2) Status setup
	  to recover from stall on TX endpoint.

5.0 2009-12-21 Gregory Nutt <gnutt@nuttx.org>

	* arch/hc: Adding framework to support m68hc11/12
	* configs/demo9s12ne64: Configuration to support Freescale DEMO9S12NE64
	  development board (MC9S12NE64 m68hcs12 processor).
	* drivers/mtd/ftl.c: A FLASH translation layer (FTL) has been implemented.
	  This layer will convert a FLASH MTD interface into a block driver that
	  can be used with any file system.  Good performance of this layer will
	  depend upon functioning write buffer support!
	  NOTE: FTL support is untested as of the initial check-in.
	* Numerous minor changes for m68hc12 to eliminate compilation errors and
	  warnings due to the fact that it uses 16-bit integer types and for casts
	  between uint32 (32-bits) and an mc68hc12 pointer (16-bits).
	* sys/types:  Size of off_t and blkcnt_t should not depend on size of
	  int in the architecture;  Removed non-standard type STATUS
	* include/: Added header files stdint.h, stdbool.h, cxx/cstdint, and
	  cxx/cstdbool
	* Changed ALL references to non-standard fixed-size types (like uint32,
	  ubyte, etc.) to standard types (like uint32_t, uint8_t, etc.) from
	  stdint.h.  Use type bool and {true, false} from stdbool.  This effected
	  most of the files in the system!  Almost all configurations have been
	  re-built and many have been re-verified in order to get confidence in
	  these changes.
	* graphics/ and examples/nx: Fix numerous build errors that have been
	  introduced lately.  NXGL has suffered some bit-rot from not being used
	  in some of the most recent ports.
	* The misc/pascal NuttX add-on package has been updated to use the new
	  standard types from stdint.h and stdbool.h and re-integrated with NuttX.
	  The released pascal-2.0 will be the first version that contains the
	  compatible changes.
	* arch/arm/src/lm3s/lm3s_ethernet.c: Fixed an important bug in the LM3S
	  Ethernet driver:  If full packet is received, the packet-too-big check
	  will fail because it needs to subtract 6 from the packet size (to
	  account for the 2-byte packet length and the 4-byte packet FCS in the
	  FIFO).
	* net/accept.c: Fixed a bad assertion (only happens when debug is enabled).
	* net/send.c net/uip/uip_tcpseqno.c: Fixed a critical error in the TCP/IP
	  logic.  The NuttX port of uIP imcludes logic to send data ahead without
	  waiting for ACKs from the recipient; this greatly improves throughput.
	  However, the packet sequence number was not being updated correctly and,
	  as a result, packets were not be ACKed by the recipient and transfers
	  would sometimes stall.  This is a very important bug fix (in fact, I
	  don't understand how TCP/IP worked at all without this fix???)
	* include/nuttx/arch.h and arch/*/common/up_udelay.c: Change argument
	  of up_udelay() to type useconds_t to avoid warnings when sizeof(int)
	  is 16-bits.
	* drivers/mmcsd/*: Add casts in constant expressions to avoid warnings
	  when sizeof(int) is 16-bits.

5.1 2010-01-30 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/lpc313x and arch/arm/include/lpc313x: Added framework
	  to support the NXP LPC3131.
	* Add configs/ea3131.  The LPC3131 port for the Embedded Artist EA3131
	  (LPC3131) is code complete and waiting for me to get hardware in
	  hand.
	* arch/arm/src/sam3u, arch/arm/include/sam3u, and configs/sam3u-ek -
	  Added the basic framework needed to begin a port for the SAM3U-EK
	  development board.
	* lib/lib_crc32.c: Add CRC32 logic by Gary S. Brown to lib/.  This is
	  the larger (but faster) table look-up version of the CRC32 algorithm.
	* configs/ea3131/tools: Added a tool to create a image suitable for
	  use with the LPC313x bootloader.
	* configs/sam3u-3k/ostest: Completed verification of the basic NuttX
	  OS test for the SAM3U.
	* arch/arm/src/common/up_createstack: stack was always been cleared
	  when it was allocated.  This is a good feature for monitoring the
	  stack during debug, but really hurts thread start-up performance.
	  Clearing is now done if CONFIG_DEBUG=y only.  Changes was only made
	  for arm, but really should be made for all architectures.
	* configs/sam3u/nsh: Added NSH configuration for SAM3U

5.2 2010-03-18 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/sam3u/sam3u_pio.c: Fix an address calculation error
	  that caused ports B & C to get mapped to the PIOA base address.
	  This is an important bugfix! (a patch is available)
	* arch/arm/src/lpc313x/lpc313x_boot.c: Fix an error in the vector
	  initialization was causing a memory fault.
	* lib/lib_strtod.c: Add strtod()
	* lpc3131/ea3131: Several bring fixes submitted by David Hewson.  The
	  lpc3131 is almost there!  Thanks David!
	* arch/arm/src/arm/up_head.S: Corrected backward conditional compilation
	  that selects if vectors are located at 0x0000:0000 or 0xffff:f000.
	  This fixes the last show stopper bug in the lpc313x bring-up.
	* configs/ea3131/nsh: Added a NuttShell (NSH) configuration for the
	  EA3131.

5.3 2010-04-11 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/lpc313x/lpc313x_usbdev.c: USB driver for the LPC313x
	  contributed by David Hewson.
	* configs/ea3131/src/up_ubstrgc.c, configs/ea3131/usbserial,
	  configs/ea3131/usbstorage: USB storage and USB serial example support
	  contributed by David Hewson.
	* Several important compilation error fixes in lpc313x and (dualspeed) USB
	  code also contributed by David Hewson.
	* arch/arm/src/sam3u/sam3u_dmac.c: DMA support for the AT90SAM3U.
	* arch/arm/src/sam3u/sam3u_hsmci.c: SD memory card support for AT90SAM3U
	  (Neither the DMA nor the HSMCI driver are functional on the initial checkin).
	* drivers/usbdev: Several important fixes to the USB mass storage driver
	  submitted by David Hewson.
	* configs/olimex-lpc2378, arch/arm/include/lpc2378, and arch/arm/src/lpc2378 -
	  Basic port of the NXP 2378 on the Olimex board contributed by
	  Rommel Marcelo.
	* arch/arm/src/sam3u/sam3u_internal.h: Fixed a critical bug in the AT91SAM3U
	  PIO decoding.  No PIOs greater than 15 could be used on any port!  Obviously,
	  no one has been using this port.

5.4 2010-04-23 Gregory Nutt <gnutt@nuttx.org>

	* include/nuttx/lcd.h: Defines an LCD interface.
	* graphics/nxglib/fb and lcd: Support LCD and framebuffer rasterizers for NX.
	* configs/sam3u-ek/src/up_lcd.c: LCD driver for LCD on SAM3U-EK development
	  board.
	* configs/sam3u-ek/nx: NX graphics configuration for the SAM3U-EK

5.5 2010-05-09 Gregory Nutt <gnutt@nuttx.org>

	* drivers/net/enc28j60.c: Microchip ENC28J60 SPI Ethernet chip driver.
	  (untested on original check-in).
	* configs/olimex-str7p11/nettest: examples/nettest configuration using
	  the ENC28J60 driver on the Olimex STMicro STR-P711.
	  (unverified on original check-in)
	* configs/olimex-str7p11/src/up_enc28j60.c: Add ENC28J60 initialization
	  logic.
	* configs/olimex-str7p11/src/up_spi.c: Fixed some bugs; added support
	  for ENC28J60.
	* arch/arm/src/str7x/str7x_xti.c: Add basic XTI support (external
	  interrupts).
	* arch/arm/src/lm3s and arch/arm/include/lm3s: Add definitions for
	  LM3S6965
	* configs/lm3s6965-ek: Add configuration for Stellaris LM3S6965
	  Evaluation Kit (including basic examples/ostest configuration)
	* lib/lib_dtoa.c and lib/lib_dtoa.c: printf will not print floating
	  point values if you select CONFIG_LIBC_FLOATINGPOINT in your
	  configuration file.  Contributed by Yolande Cates.  NOTE:  these
	  floating point operations have not been well tested and may not
	  be portable to all floating point implementations.
	* configs/lm3s6965-ek/nsh: Added NuttShell (NSH) configuration for
	  the LM3S6965 Evaluation Kit.  Includes both serial and telnet
	  interfaces.
	* net/net_close.c: Correct a UDP reference counting error

5.6 2010-06-05 Gregory Nutt <gnutt@nuttx.org>

	* drivers/lcd/p14201.c: Driver for RiT P14201 series 128x96 4-bit OLED.
	* configs/lm3s6965-ek/nx: NX graphics configuration for the LM3S6965
	  Ethernet Evaluation Kit.
	* graphics/: Numerous fixes to get the P14201 4-bpp grayscale display
	  working (there may still be some minor issues .. see the TODO list).
	* arch/arm/include/lpc17xx and arch/arm/src/lpc17xxx: Began port for
	  NXP LPC1768.  As of the 5.6 release, there is a complete set of
	  LPC17xx header files defining all bits in all LPC17xx registers,
	  but little else (I still do not have hardware in hand).
	* drivers/mtd/m25px.c: Add support for M25P1 flash part (See NOTE)
	* include/nuttx/i2c.h: Extended I2C interface definition to handle
	  multiple transfers (See NOTE).
	* include/nuttx/usbdev.h: Corrected an important macro definition
	  needed to correctly handle USB null packet transfers (See NOTE).
	* arch/arm/src/lpc313x: New drivers: I2C and SPI.  Plus several
	  important LPC313x USB bug fixes (See NOTE).

	NOTE: Contributed by David Hewson.

5.7 2010-06-22 Gregory Nutt <gnutt@nuttx.org>

	* configs/nucleus2g: Add ostest configuration for the Nucleus 2G
	  LPC1768 board from 2G Engineering (http://www.2g-eng.com/)
	* arch/arm/src/lpc17xx: Added basic LPC17xx boot-up logic,
	  interrupt handling, and GPIO configuration.
	* configs/nucleus2g/ostest: Completed bring-up of LPC1768 on
	  the Nucleus2G board using the examples/ostest
	* configs/nucleus2g/nsh: Added and verified a NuttShell (NSH)
	  configuration for the LPC1768 on the Nucleus2G board.

5.8 2010-07-18 Gregory Nutt <gnutt@nuttx.org>

	* configs/nucleus2g/src/up_nsh.c and up_ssp.c: Add support
	  for SPI-based MMC/SD cards and integrate into the NSH example.
	* arch/arm/src/lm3s/lm3s_vectors.S: Correct vectors for GPIOC & D
	  interrupts.
	* arch/arm/src/lpc17xx/lpc17_clockconfig.c: Power was not being
	  provided to GPIO module.  This is a critical bugfix!
	* arch/arm/src/lpc17xx/lpc17_serial.c: Improved logic to handle
	  missed TX interrupts.
	* arch/arm/src/lpc17xx/lpc17_ssp.c: Fix a hard fault during SSP
	  initialization.
	* configs/nucleus2g/src/up_led.c: Change how LEDs are controlled
	  so that they can be used both for NuttX instrumentation and
	  by application software.
	* include/net/uip/igmp.h and uip-igmp.h: Add header files ini
	  preparation for NuttX IGMP support
	* net/uip/uip_igmp*.c: Add IGMP support (untested on initial
	  checkin).
	* examples/igmp: Add a trivial test for IGMP (much more is needed)
	* configs/nucleus2g/usbserial and usbstorage: Add USB configurations
	  for testing purposes.
	* arch/arm/src/common/up_internal.h, cortexm3/up_assert.c,
	  */*_vectors.S: Correct compilations errors when CONFIG_ARCH_INTERRUPTSTACK
	  is enabled (feature still not tested)

5.9 2010-08-25 Gregory Nutt <gnutt@nuttx.org>

	* examples/nsh/nsh_telnetd.c: Fix compilation errors that happen
	  when both DHCPC and TELNETD are enabled in the Nuttshell.
	* graphics/nxglib/fb/nxglib_moverectangle.c: Fix a logic error
	  that caused an uninitialized variable warning.  I still don't
	  have a test to prove that the changes are correct.
	* configs/olimex-lpc2378: Add support for the CodeSourcery toolchain
	  under Linux (contributed by Alan Carvalho de Assis).
	* arch/arm/src/lpc17xx/lpc17_gpio.c: Fix an important GPIO configuration
	  bug:  When attempting to set no pull-up or pull-down (floating),
	  it would, instead, select pull-down.
	* arch/arm/src/lm3s/lm3s_gpioirq.c: Fix warning for returning a value
	  from functions returning void (contributed by Tiago Maluta).
	* netutils/dhcpc/dhcpc.c: lease_time was not in host order
	* examples/uip/main.c: if DHCPC is selected, this example now shows
	  the assigned IP address.
	* arch/arm/src/lm3s and arch/arm/include/lm3s: Definitions for the
	  TI LM3S9B96 contributed by Tiago Maluta.
	* arch/arm/src/lm3s/lm3s_gioirq.c: Fix a logic error in the address
	  table lookup.
	* arch/arm/src/lm3s/lm3s_gioirq.c: Also needs to enable the global
	  GPIO interrupts.
	* arch/arm/src/lm3s/lm3s_internal.h and lm3s_gpio.c: Fixed the encoding
	  of GPIO port number that limited support for GPIO ports to 8
	* sched/pg_*.c and *.c and include/nuttx/page.h: Implemented the
	  common, core logic for on-demand paging. See
	  http://www.nuttx.org/NuttXDemandPaging.html for details.
	* drivers/usbdev/usbdev_serial.c: Correct compilation errors that
	  occur if CONFIG_USBDEV_DUALSPEED is selected.
	* configs/ea3131/pgnsh: Add an NSH configuration with on-demand paging
	  enabled.  This is not expected to be a functionality configuration (at
	  least not yet); it was created in order to debug the on-demand paging
	  feature.
	* configs/ntosd-dm320/*/Make.defs: Codesourcery and devkitARM toolchains
	  now supported for the Neuros OSD.
	* configs/ntosd-dm320 and arch/arm/src/dm320: Add support for the
	  Neuros production OSD (changes contributed by bf.nuttx).

5.10 2010-09-07 Gregory Nutt <gnutt@nuttx.org>

	* configs/ea3131/locked: Create logic to support a two pass build
	  process:  The first pass forces critical logic into the locked text
	  region, the second pass builds the NuttX executable more-or-less as
	  normal.
	* Makefile, arch/arm/src/Makefile, configs/ea3131: Add logic to
	  support a two-pass final link.  This logic is only in place in
	  the arch/arm/src/Makefile for now.
	* arch/arm/src/lpc17xx/lpc17_internal.h: Add missing parentheses in
	  macros definitions (patch submitted by Tiago Maluta).
	* Documents/NuttxPortingGuide.html, configs/README.txt, etc. -
	  Replaced CONFIG_EXAMPLE with CONFIG_APP_DIR (see documents for
	  description).  This allows NuttX application code to be built
	  outside of the examples/ directory.

	  For people who have their own configurations and/or Makefiles,
	  you will need to make a couple of changes:

	  - Replace all occurrences of CONFIG_EXAMPLE=foobar with
	    CONFIG_APP_DIR=examples/foobar in all of the configuration
	    files.
	  - Replace any occurrences of examples/$(CONFIG_EXAMPLE) with
	    $(CONFIG_APP_DIR)
	  - Replace any occurrences of lib$(CONFIG_EXAMPLE)$(LIBEXT)
	    with libapp$(LIBEXT) in your Makefiles.
	  - Check any other occurrences of CONFIG_EXAMPLE.

	* arch/arm/src/lpc313x/lpc313x_spi.c: Fix compilation error when
	  when CONFIG_DEBUG is enabled.
	* arch/arm/src/lm3s and arch/arm/include/lm3s: Support for the
	  lm3s8962 contributed by Larry Arnold.
	* configs/lm328962-ek: Support for the TI/Stellaris EKC-LM3S8962
	  board (also contributed by Larry Arnold).
	* arch/arm/src/lpc313x/lpc313x_boot.c: The call to lpc313x_boardinitialized()
	  should not be conditioned on CONFIG_ARCH_LEDs being defined!
	* arch/arm/src/lpc313x/: APB0 and APB1 cannot lie in different
	  sections; they are too close together.
	* arch/arm/src/lpc313x/lpc13x_boot.c: Resetting all of the clocking
	  had a side effect of wiping out the first 6 words of memory where the
	  interrupt vectors are located (and also not resetting the fractional
	  dividers).  This is not usually noticeable because the IRQ vectors
	  are after this point, but really causes problems if you want to handle
	  data and prefectch aborts which are within this zeroed region.

5.11 2010-10-01 Gregory Nutt <gnutt@nuttx.org>

	* configs/ea3131/src/up_fillpage.c: Added new configuration item
	  CONFIG_PAGING_BINPATH.  If CONFIG_PAGING_BINPATH is defined, then it
	  is the full path to a file on a mounted file system that contains
	  a binary image of the NuttX executable.  Pages will be filled by
	  reading from offsets into this file that correspond to virtual
	  fault addresses.  up_fillpage.c implements logic to perform page
	  files using the CONFIG_PAGING_BINPATH file.
	* configs/mbed: Add configuration to support the mbed.org LPC1768
	  board (Contributed by Dave Marples).
	* sched/sem_wait.c and sem_waitirq.c: Eliminate a race condition
	  that can occur when a semaphore wait is interrupt by a signal.
	  (see email thread: https://groups.yahoo.com/neo/groups/nuttx/conversations/messages/530)
	* drivers/mtd/at45db.c: Add a driver for the Atmel AT45DB161D 4Mbit
	  SPI FLASH part (untested on initial check-in).
	* arch/arm/src/lm3s and arch/arm/include/lm3s: Corrections for the
	  lm3s8962 port contributed by Larry Arnold.  That port is purported
	  to work correctly with these changes in place.
	* examples/ostest/prioinherit.c: Need to reinitialize globals if
	  test is ran repeatedly in a loop.
	* configs/ez80f910200zco: Updated to used ZDS-II 4.11.1

5.12 2010-10-26 Gregory Nutt <gnutt@nuttx.org>

	* arch/avr: Add a place to support AVR family processors.
	* arch/avr/include/avr32 and arch/avr/src/avr32: Add support for AVR32
	  (all of the AVR32 is a work in progress).
	* arch/avr/include/at32uc3 and arch/avr/src/at32uc3: Add support
	  for the AVR32 UC3A/B family of AVR32 MCUs.
	* configs/avr32dev1: Add support for the Atmel AVR32DEV1 board featuring
	  the AT32UC3B0256 MCU.  This board is produced by www.mcuzone.com.
	* include/stdlib.h, lib/Makefile, lib/lib_abs.c, lib/lib_labs.c,
	  lib_labs.c, lib_llabs.c, lib_imaxabs.c: Add abs(), labs(), llabs(), and
	  imaxabs().
	* Add include/inttypes.h
	* arch/hc/src/mc9s12ne64: This hcs12 port grew a few more files.  But it
	  is still a long way from complete.
	* arch/*/src/*/*_sigdeliver.c: Fixed a serious error in the signal
	  trampoline logic.  Essentially, interrupts are re-enabled while the
	  signal handler executes, but the logic to re-disable the interrupts
	  before returning from the signal handler trampoline was missing.  Under
	  certain circumstances, this can cause stack corruption.  This was
	  discovered by David Hewson on an ARM9 platform, but since the code
	  has been leveraged, the bug has been propogated from ARM to Cortex-M3,
	  AVR32, M16C, SH1, ZNEO, eZ80, Z8, and Z80 -- almost every architecture.
	  The correction has been incorporated for all architectures but only
	  verified on a few.

5.13 2010-11-09 Gregory Nutt <gnutt@nuttx.org>

	* lib/lib_strnlen.c: Added POSIX 2008 strnlen() function.  Contributed
	  by Michael Hrabanek.
	* Fix wild, consistent naming error.  For some reason, I called the at32uc3*
	  parts at91uc* everywhere.  Fixed by changing lots of files and directories.
	* configs/avr32dev1/ostest: The AVR32 port now successfully passes the
	  examples/ostest.  We have a good AVR32 port!
	* configs/avr32dev1/nsh: Added a configuration to support the NuttShell
	  (NSH). As of this writing, here is a problem receiving serial data (this
	  is, very likely, my hardware setup).
	* lib/lib_open.c: Fix an error in fdopen when a valid file descriptor does
	  not refer to an open file.
	* configs/olimex-lpc1766stk: Add support for the Olimex LPC1766-STK
	  development board.  The OS test and NSH configurations (only) have been
	  verified.

5.14 2010-11-27 Gregory Nutt <gnutt@nuttx.org>

	* configs/olimex-lpc1766stk/nettest: Add examples/nettest configuration to
	  verify the LPC17xx Ethernet driver currently under development.
	* arch/arm/src/lpc17xx/lpc17xx_ethernet.c/.h: Began development of
	  the LPC17xx Ethernet driver.  Driver in CVS functional after 2010-11-23.
	* sched/timer_settime.c: Fix an error in set-up of a one-shot POSIX timer.  It
	  was using the repititive timer value (which is zero in the one-shot case),
	  always resulting in a 10Ms timer!  Found and fixed by Wilton Tong.
	* arch/arm/src/lpc17xx/lpc17_vector.S, stm32/stm32_vector.S, lm3s/lm3s_vector.S,
	  sam3u/sam3u_vector.S: Fixed a hard fault problem that can occur if certain
	  types of interrupts are pending at the time another interrupt returns
	  (SYSTICK).  This has not been verified on all plaforms, but is a critical
	  fixed that is needed by all Cortex-M3 NuttX users.
	* configs/olimex-lpc1766stk/thttpd: Add a THTTPD configuration for the
	  Olimex LPC2766-STK board. Verified successfully.
	* net/uip/uip_tcpappsend.c: Correct an important logic bug in some uIP state
	  data the is used to manage retransmissions.  The uIP logic was incompatible
	  with the retransmission logic of net/send.c in one place.  The final error
	  was that the final packet in a sequence of packets was too large!  In the
	  THTTPD example, this would leave some garbage at the bottom of the display
	  (or worse).  I don't know why I haven't see this bug before???
	* net/uip/uip_tcpinput.c: The change to uip_tcpappsend.c unmasked an
	  additional error in the TCP sequence number handling.  This sympom was that
	  the send() function would hang with outstanding, unacknowledged data (with
	  no re-transmit requests).  The was due to differences in sequence number
	  handling in send() and in uip_tcpinput.c; uip_tcpinput.c thought (incorrectly)
	  that all of the bytes were acknowledged; send.c knew that they were not.

5.15 2010-12-12 Gregory Nutt <gnutt@nuttx.org>

	* net/uip/uip_tcpaddsend.c and net/send.c: Another place where the TCP sequence
	  number problem "fixed" in 5.14 might occur.
	* net/send.c: Check if the destination IP address is in the ARP table.  If
	  not, then don't consider the packet sent.  It won't be, an ARP packet will go
	  out instead.  This improves behavior, for example, on the first GET request
	  from a browser.
	* arch/arm/src/lpc17xx/lpc17_emacram.h and lpc17_allocateheap.c: The Ethernet
	  logic was using all of AHB SRAM Bank0 for Ethernet packet buffers (16K).  An
	  option was added to limit the amount of SRAM used for packet buffering and to
	  re-use any extra Bank0 memory for heap.  configs/olimex-lpc1766stk/nettest
	  now uses only 8K at the beginning of Bank0; the 8K at the end of Bank0 is
	  included in the heap
	* arch/arm/src/lpc17xx/lpc17_ssp.c: Fix compilation errors when SSP1 is
	  selected.
	* configs/olimex-lpc1766stk/nsh: Enable network and SD/MMC card support in
	  NSH.  Networking and telnetd interface as well as SPI-based microSD are
	  now functional.
	* examples/nsh/nsh_netinit.c: Fix NSH bug.  If CONFIG_NET is selected, but
	  CONFIG_EXAMPLES_NSH_TELNETD is not selected, then the network is never
	  initialized and bad things happen if you try to ping.
	* drivers/lcd: Add header files for the Phillips PCF8833 LCD controller and
	  for the Epson S1D15G10 LCD controller.  A driver for the Nokia 6100 LCD is
	  coming.
	* include/nuttx/spi.h and almost all other SPI files: Added an optional
	  cmddata() method to the SPI interface.  Some devices require an additional
	  out-of-band bit to specify if the next word sent to the device is a command
	  or data. This is typical, for example, in "9-bit" displays where the 9th bit
	  is the CMD/DATA bit. The cmddata method provides selection of command or data.
	* drivers/lcd/p14201.c: Now uses the cmddata() method of the SPI interface.
	* arch/arm/src/lpc17xx/lpc17_usbdev.c: LPC17xx USB driver now appears to
	  to be fully functional.  examples/usbstorage configuration verified (the
	  examples/usbserial configuration is untested).
	* drivers/usbdev/usbserial.c and usbstorage.c: All USB class drivers need
	  to call DEV_CONNECT() when they are ready to be enumerated.  That is,
	  (1) initially when bound to the USB driver, and (2) after a USB reset.
	* drivers/lcd/nokia6100.c: A driver for the Nokia 6100 LCD.  This driver
	  has not be verified as of the initial check-in.
	* configs/olimex-lpc1766stk/nx: A NX graphics configuration for the Olimex
	  LPC1766-STK board using the Nokia 6100 LCD driver.  This configuration has
	  not been verified as of the initial check-in.
	* include/nuttx/spi.h: the SPI_SETBITS macro was calling the setmode method.
	  This is a very important bug-fix in some usages.

5.16 2011-01-10 Gregory Nutt <gnutt@nuttx.org>

	* include/nuttx/usb: Created new directory.  Moved all usb-related header
	  files to this new directory.  Created a skeleton for a new USB host header
	  file
	* drivers/usbhost: Add USB host "registry" where connect devices can be
	  matched with the correct USB class driver.
	* arc/arc/src/lpc17xx/lpc17_usbhost.c: Add a simple USB host driver for
	  the NXP lpc17xx.
	* drivers/usbhost: Add generic USB device enumeration logic.
	* drivers/usbhost: Add a USB host class driver for the (Bulk-Only) USB
	  Mass Storage Class.

5.17 2011-01-19 Gregory Nutt <gnutt@nuttx.org>

	* include/nuttx/usb: rename usb_storage.h to storage.h.
	* arch/arm/src/lpc17xx/lpc17_usbhost.c: Add support for low-speed devices.
	* drivers/usbhost/usbhost_skeleton.c: Template for new class drivers
	* include/nuttx/usb/hid.h and drivers/usbhost/usbhost_hidkbd.c: New
	  files for HID keyboard support.
	* arch/arm/src/lpc17xx/lpc17_usbhost.c: Will now handle multiple
	  concurrent transfers on different endpoints (still only one TD per
	  endpoint).  All methods are protected from re-entrancy; lots of re-
	  structuring in preparation for interrupt endpoint support.
	* arch/arm/src/lpc17xx/lpc17_usbhost.c: Add support for periodic
	  interrupt transfers.
	* examples/hidkbd: Added a simple test for the USB host HID keyboard
	  class driver.
	* configs/olimex-lpc1766stk/hidkbd: Added a configuration to build the
	  USB host HID keyboard class driver test for the LPC17xx.
	* Ran the tool CppCheck (http://sourceforge.net/apps/mediawiki/cppcheck) and
	  fixed several errors in the code identified by the tool.

5.18 2011-02-27 Gregory Nutt <gnutt@nuttx.org>

	* Incorporate several uIP patches from http://gitweb.aeruder.net/?p=uip.git;a=summary.
	  - Lost SYNACK causes connection reset
	  - Fix missing UDP stats for sent/received packets
	  - Added support for Cygwin as development/test platform.
	* configs/demo9s12ne64: Integrate new buildroot-1.9 m8s12x toolchain.
	* 'uname -o' is used throughout the build logic in bash scripts and also in
	  Make.defs files in order to distinguish between Cygwin and Linux.  However,
	  the -o option is not standard and is not supported under, for example, OS-X or
	  Solaris.  This was solved by changing all 'uname -o' references to the more
	  complex:  'uname -o 2>/dev/null || echo "Other"'
	* drivers/usbhost/usbhost_enumerate.c: Add logic to get the VID and PID.  This
	  is necessary in order to support vendor-specific USB devices.
	* examples/wlan, configs/olimex-lpc1766stk/wlan, drivers/usbhost/usbhost_rtl8187.c,
	  Add infrastructure to support RTL18187 wireless USB.
	* configs/nucleus2g: backed out USB host changes... wrong board.
	* Renamed arc/hc/include/mc9s12ne64 and src/mc9s12ne64 to m9s12.  That name is
	  shorter and more general.
	* The NuttX repository has been converted to SVN and can now be found here
	  http://svn.code.sf.net/p/nuttx/code/trunk/
	* configs/mbed/hidkbd: Added USB host support for the mbed LPC1768 board; add
	  a USB host HID keyboard configuraion.
	* drivers/usbhost/hid_parser.c: Leverages the LUFA HID parser written by
	  Dean Camera.
	* examples/nsh: Correct an usage of getopt(): If you stop calling getopt()
	  before all parameters are parsed, you can leave getopt() in a strange state.
	* include/nuttx/video/fb.h: Restore missing RGB type that was accidentally removed
	  when Nokia 6100 support was added.
	* Rename arch/pjrc-8051 to arch/8051
	* configs/ne64badge: Add a configuration for the Future Electronics Group
	  NE64 Badge development board (Freescale MC9S12NE64)
	* Changes contributed by Uros Platise:
	  - Add support for the STM32F103RET6
	  - configs/vsn: Support for the ISOTEL NetClamps VSN V1.2 ready2go sensor
	    network platform
	* arch/hc, configs/ne64badge: Development is complete for the Freescale
	  mc9s12ne64 on the Future Electronics Group NE64 /PoE Badge board.  Howeve,
	  this port remains untested until I figure out this BDM / Code Warrior
	  and paged build thing
	* Added a new 'kill' command to NSH that will support sending signals to
	  running NuttX tasks.

5.19 2011-03-12 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/stm32/stm32_idle.c: During idle times, the STM32 now uses the
	  WFI instruction to sleep in a reduced power mode until the next interrupt
	  occurs (Contributed by Uros Platise).
	* NSH: 'mem' command renamed to 'free'.  Output is now more similar to the
	  Linux 'free' command.
	* NSH: Correct a redirection bug in NSH.  The following would not work; it
	  resulted in a hang after the 'cat /dev/fifo':

	    nsh> mkfile /dev/fifo
	    nsh> cd /tmp             # /tmp is a mounted RAM disk
	    nsh> cat /dev/fifo > test.txt &
	    nsh> echo "This is a test" > /dev/fifo

	  The error was caused because (1) there was a path that resulted in stdout
	  being closed (the "hang") and also (2) the 'cat' command was always outputting
	  to stdout, not to the redirected file descriptor.  Now:

	    nsh> cat test.txt
	    This is a test

	* drivers/pipes/pipe_common.c:  Driver open method was not returning an EINTR
	  error when it received a signal.  Instead, it just re-started the wait.  This
	  makes it impossible to kill a background pipe operation from NSH.
	* include/stdint.h: Correct some errors in conditional compilation (submitted
	  by Johannes Hampel).
	* arch/arm/lpc17xx/lpc17_idle.c: Uses the same logic as the STM32: uses the
	  WFI instruction to sleep in a reduced power mode until the next interrupt
	  occurs.
	* configs/olimex-lpc1766stk: Added an LED encoded to indicate if the LPC1766
	  is in sleeping.
	* examples/mm: This is a simplified version of the "built-in" memory manager
	  test of mm/mm_test.c.  It is simplified because it does not have access to
	  the internals of the memory manager as does mm/mm_test.c, but it has the
	  advantage that it runs in the actual NuttX tasking environment (the
	  mm/mm_test.c only runs in a PC simulation environment).
	* drivers/mmcsd_sdio.c/h: Several corrections submitted by Uros Platise.
	* arch/x86: Provide support for x86 architectures.  Support for the i486
	  architecture under QEMU is provided under arch/x86/include/i486,
	  arch/x86/include/qemu, arch/x86/src/i486, and arch/x86/src/qemu.
	* configs/qemu-i486: "Board" support configurations for verifying the QEME
	  i486 port.
	* arch/arm/src/stm32/stm32_spi.c: Correct base address of SPI3 (reported by
	  Uros Platise).
	* drivers/mmcsd/mmcsd_sdio.c: Correct a loop termination condition (also
	  reported by Uros Platise).
	* drivers/mtd/ramtron.c: Driver for SPI-based RAMTRON NVRAM devices FM25V10
	  (and others).  Contributed by Uros Platise.
	* examples/nsh and tools/mkromfsimg.sh: Add support for platform-specific
	  ROMFS-based NSH start-up scripts.
	* drivers/serial/uart_16550.c and include/nuttx/serial/uart_16550.h: Support
	  for a generic 16550 UART.
	* configure/qemu-i486/nsh: QEMU NSH example.
	* ../apps: The apps directory add-on was created by Uros Platise.  It
	  supports a set of end-user applications than can be executed on top of
	  NSH.  Think of it this way:  In a buckled-up embedded application, your
	  end-user programs will probably have their own dedicated start-up logic.
	  But, during development, you might want to have you applications
	  available and executable from the NSH command line.  This apps/ addon
	  (and NSH hooks) was contributed by Uros to accomplish just that.
	* sched/sched_waitpid() and include/sys/wait.h: Provides a simple and
	  very incomplete implementation of waitpid().  waitpid() is only available
	  if CONFIG_SCHED_WAITPID is defined in your configuration file.
	* sched/atexit.c and sched/exit.c: The atexit function is not frequently
	  used.  In order to save a few bytes, it is now conditioned on
	  CONFIG_SCHED_ATEXIT.  It your application is currently using atexit(),
	  you will need to add CONFIG_SCHED_ATEXIT to your configuration file.
	* drivers/net/slip.c: Add a SLIP driver (untested on initial check-in).
	* configs/olimex-lpc1766stk/slip-httpd: An example that uses SLIP to
	  provide a serial-port based THTTPD web server.

6.0 2011-03-21 Gregory Nutt <gnutt@nuttx.org>

	* lib/lib_fopen(): fopen() was not returning the correct errno value
	  when the underlying open() failed.
	* include/net/uip/uip-arch.h: The uIP interface has been extended
	  slightly so that drivers can be concurrenly filling and sending
	  packet buffers.  This capability was needed by the SLIP driver.
	* drivers/net/slip.c: Several corrections and some re-design of
	  of the driver.
	* apps/ChangeLog.txt: the apps/ directory now has its own ChangeLog.
	* configs/vsn:
	  - IDLE LED blinking fix
	  - Added board power off function
	* arch/arm/src/stm32/stm32_gpio.c and stm32_internal.h: Fixed
	  PullUp/Down Input Configuration.
	* arch/arm/src/lpc17xx/lpc17_serial.h: Now supports Auto-RTS and
	  Auto-CTS modes.  This is needed to support SLIP.
	* drivers/net/slip.c: SLIP is now basically functional on the
	  LPC17xx with some caveats as described in the TODO list under
	  LPC17xx.
	* arch/x86/include/i486/irq.h: Fix irqrestore() macro... it was not
	  correctly re-enabling interrupts.
	* arch/x86/src: Fix numerous problems with i486/QEMU context
	  switching.  Basically, the logic was missing the cases to handle
	  the differing stack frames when a priority change occurs and when
	  no priority change occurs.
	* configs/qemu-i486/ostest and nsh: The QEMU i486 port is complete.
	  it now passes the OS test and supports the NuttShell (NSH).
	* misc/drivers: Created a new directory to hold non-BSD licensed
	  drivers that may be added into NuttX via an installation script.
	* drivers/usbhost/usbhost_rtl8187.c: A decision was made to
	  incorporate code taken from the Linux kernel.  That changes the
	  licensing on this module to GPL.  To avoid licensing contamination,
	  this driver was moved to misc/drivers/rtl8187x *prior* to adding
	  any of the GPL logic.  There is an INSTALL.sh script at the location
	  where the GPL driver(s) can be re-installed into the NuttX source
	  tree.  By re-installing the driver, you agree to the GPL licsensing
	  and all of its implications.
	* Makefile, apps/Makefile, tools/configure.sh:  Add logic to copy
	  configs/<board>/<config>/appdir to apps/.config and to simply the
	  application configuration logic.
	* examples/nsh and apps/nshlib: Move the core NuttShell (NSH) logic
	  out of the exemples directory and into the apps/ directory where
	  it belongs.
	* apps/Makefile and configs/*/appconfig: Use '=' as the delimiter
	  instead of '/' so that sub-directories in apps/ can be used.
	* apps/vsn: Move all VSN apps to apps/vsn.
	* nuttx/examples moved to apps/examples

6.1 2011-04-11 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/include/lpc17xx/irq.h and arch/arm/src/lpc17xx/lpc17_gpio*.c:
	  Fix several bugs in the GPIO interrupt logic.  Submited by
	  Decio Renno.
	* Initialization for the CONFIG_APPS_DIR is now supported during the
	  earlier, 'context' build phase.
	* arch/arm/src/lpc17_gpioint.c: Finish coding of the LPC17xx GPIO
	  interrupt logic.
	* net/netdev_unregister.c: Add capability to un-register a network
	  device.
	* drivers/mmcsd/mmcsd_sdio.c: extra effort to correctly handle cases
	  without the SDcard (but one issue still exists in STM32)
	* arch/arm/src/stm32/stm32_tim.*: Added basic timer support TIM1..TIM8
	  with output PWMs and interrupt logic
	* config/vsn/src:  Added basic support for Sensor Interface (GPIO and
	  PWM Power Output, and the sif utility program)
	* fs/: Reorgnize header so that file systems can be built outside
	  of the nuttx source tree
	* apps/namedapp/binfs.c: Create a tiny filesystem that can be used
	  to show the internal named apps under /bin.
	* fs/fs_opendir.c: Correct an error that occurs when a file system is
	  mounted in the root directory.  This was discovered while mounting
	  the named app's /bin directory.
	* lib/: Move all source files into a subdirectory of lib/ named after
	  the header file in which the library function is prototyped.
	* sched/ and lib/pthread/:  Move pthread attribute-related interfaces
	  from sched/ to lib/pthread where they more appropriately belong.
	* sched/ and lib/semaphore/:  Move some semaphore-related interfaces
	  from sched/ to lib/pthread where they more appropriately belong.
	* syscall/: The beginnings of an optional syscall Kernel interface.
	* tools/mksyscall.c:  Add a tool that will auto-generate syscall proxies
	  and stubs from a comma-separated-value (CSV) data file.
	* arch/arm/src/cortexm3/mpu.h: Add a header file describing the Cortex-M3
	  MPU registers.
	* Numerous modifications to the build system.  Various people have reported
	  build problems since the re-organization and release of NuttX-6.0.  I am
	  unable to replicate the build problems in my environment, but the changes
	  have be incorporated in hope of correcting the build issues in other
	  environments.
	* drivers/i2c/st_lis331dl.c:  I2C-based driver for the LIS331DL MEMS
	  motion sensor.  Contributed by Uros Platise.
	* Makefile: The NuttX build system  will now supported building NuttX as two
	  separately linked images: (1) a kernel-mode RTOS image, and (2) a user-
	  mode application image that communicates to the RTOS kernel via system
	  calls.  A lot more still must be done.
	* user_initialize(): Eliminated the user_initialize() initialization hook.
	  It is difficult to maintain and redundant:  Board level initialization
	  an up_initialize() provide the same kind of capability.
	* arch/*/include/*/type.h: On some compilers, char defaults as unsigned.
	  Explicitly add signed to integer types if signed is what is required.
	* arch/*: For all architectures -- Global register state save structure
	  (usually called g_current_regs) should be marked volatile; Added general
	  capability to support nested interrupts (not fully realized for all
	  architectures).
	* sched/task_create.c: Add support for starting kernel-mode thread.
	* drivers/usbdev/usbdev_serial.c: Fix reported by Sheref Younan.  USB
	  was being reset after serial driver was closed.  As a result, you could
	  no reopen the serial driver.
	* configs/lpcxpresso-lpc1768: Add a board configuration for the Embedded
	  Artists LPCXpresso LPC1768 board.

6.2 2011-05-06 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/lpc17xx/lpc17_gpioint.c: Correct errors in logic that maps
	  and IRQ number into a register bit number.
	* Makefile: Fix an error introduced in the top-level Makefile in NuttX-6.1.
	  This error only shows up if you have a /tftpboot directory.  Then the
	  make will fail with an obscure error about not being able to stat pass2.
	* configs/lpcxpresso-lpc1768/nsh: Add an NSH configuration for the
	  LPCXpresso board.
	* configs/*/ld.script: Removed 'sh_link not set for section .ARM.edix' for
	  a few of the builds.  In you have this warning, it can be removed with the
	  following change to the ld.script file:

		+ __exidx_start = ABSOLUTE(.);
		.ARM.exidx : {
		-     __exidx_start = ABSOLUTE(.);
		      *(.ARM.exidx*)
		-     __exidx_end = ABSOLUTE(.);
		} >sram
		+  __exidx_end = ABSOLUTE(.);

	* arch/arm/src/lpc17xx: Correct some typos/bugs in configuration of LPC17xx
	  UART2 and UART3.
	* nuttx/clock.h: Replace all references to the global variable g_system_timer
	  with clock_systemtimer() (currently just a macro that that returns g_system_timer).
	* lib/string/strrch.c: Would fail if the searched-for character were the first
	  character in the string.
	* tools/version.sh and mkversion.c: Tools to manage a NuttX version number
	  file
	* sched/clock_getutc() and lib/time/lib_time.c: Add support for 1 second UTC
	  interface.
	* net/net_dup2.c and include/nuttx/net.h: The conditional compilation for
	  '#if CONFIG_NFILE_DESCRIPTOR > 0' was wrong in both of these files.  It should
	  be '#if CONFIG_NFILE_DESCRIPTORS > 0'.  This causes a dup2() failure in THTTPD
	  and a failure to get a CGI page.  The consequence can be a very serious bug!
	* configs/lpcxpresso-lpc1768/usbstorage, thttpd, and dhcpd: Add an USB storage,
	  THTTPD web server, and DHCP server configurations for the NXP LPCXpresso board.
	* drivers/lcd/ug-9664hswag01.c and ssd1305.h: Add support for Univision UG-9664HSWAG01
	  OLED with Solomon Systech SD1305 LCD controller.
	* configs/lpcxpresso-lpc1668/nx: Add a NX graphics configuration for the LPCXPRESO
	  board.
	* graphics/nxglib/nxglib_nonintersecting.c: Fix some single bit errors in
	  calculation of non-intersecting regions.  This was causing an anomaly
	  in examples/nx in column 0.
	* drivers/mtd/rammtd.c: Added a RAM based MTD driver.  This RAM driver simulates
	  FLASH and is useful for testing purposes.
	* arch/arm/src/arm/up_head.S: Fix backward conditional compilation.  This cause
	  the configs/mx1ads configuration to fail to build but does not appear to affect
	  any other ARM9 build.
	* fs/nxffs: Adding a tiny, wear-leveling FLASH file system for NuttX.  This
	  file system is intended to be small and will have some limitations.  The
	  implementation is incomplete on initial checkin.
	* apps/examples/nxffs and configs/sim/nxffs:  Add a test a a configuration that
	  will be used to verify NXFFS.
	* fs/fat/fs_fat32.c and fs_fat32util.c: Incorpated two bugs with fixed provided
	  by Sheref Younan.  Thanks!
	* fs/nxffs: After a couple of weeks of testing and bug fixes, NXFSS appears
	  stable and functional.

6.3 2011-05-15 Gregory Nutt <gnutt@nuttx.org>

	* Remove clock_getutc().  It is replaces with clock_gettime(CLOCK_ACTIVETIME).
	  Add other RTC related changes provided by Uros Platise.
	* arch/arm/src/stm32/stm32_flash.c: Add support for access to on-chip STM32
	  FLASH; beginning of integration with NXFFS (Uros Platise).
	* arch/mips: Added directory structure for PIC32 support
	* configs/pcblogic-pic32mx:  Add directory structure for PCB Logic PIC32MX board
	* apps/include:  Move include/apps to apps/include.  A symbolic link is created at
	  build time
	* Makefile: Removed support for Pascal pcode interpreter.  Support for that
	  interpreter has been moved to apps/interpreter/Makefile.
	* tools/mkdep.sh: Should not report an error if there are no files on the command
	  line.  This happens normally in certain configurations.
	* drivers/usbhost: Sheref Younan reported an error in the error handling when
	  connection to a USB device fails.  In certain fail cases, the logic would try
	  to free the device class instance twice, the first was okay, but the second
	  caused a crash.
	* graphics/nxbe/nxbe_colormap.c: Fix error noted by Bassem Fahmy.  The function
	  nxbe_colormap was change to nxbe_configure... apparently "search-and-replace"
	  error. This error was not noticed before because most NX platforms do not use
	  colormapping.
	* arch/rgmp and configs/rgmp.  Add architecture support and build
	  configuration for RGMP.  RGMP is a project for running GPOS and
	  RTOS simultaneously on multi-processor platforms. See
	  http://rgmp.sourceforge.net/wiki/index.php/Main_Page for further
	  information about RGMP.
	* lib/stdio/lib_fclose.c: Must flush all buffered data when the file is closed.
	  Instead, it was discarding the buffered data.
	* lib/stdio: All output stream logic was modified to support CONFIG_STDIO_LINEBUFFER.
	  If standard C buffered I/O is enabled (CONFIG_STDIO_BUFFER_SIZE > 0), then this
	  option may be added to force automatic, line-oriented flushing the output buffer
	  for putc(), fputc(), putchar(), puts(), fputs(), printf(), fprintf(), and vfprintf().
	  When a newline is encountered in the output string, the output buffer will be
	  flushed.  This (slightly) increases the NuttX footprint but supports the kind of
	  behavior that people expect for printf.

6.4 2011-06-06 Gregory Nutt <gnutt@nuttx.org>

	* lib/drivers/cc1101: Add initial, functional CC1101 wireless driver
	  (contributed by Uros Platise)
	* arch/mips and configs/pcblogic-pic32mx: The MicroChip PIC32MX port is now
	  code complete and ready to begin testing.  Unfortunately, it looks like
	  testing will be delayed due to tool issues (My PICkit 2 will not work the
	  the MPLAB debugger on PIC32; I will need to get a PICkit 3).
	* drivers/net/e1000.c/h: A PCI-based E1000 Ethernet driver submitted
	  by Yu Qiang.
	* lib/net/lib_inetaddr.c: An implementation of the inet_addr() function
	  submitted by Yu Qiang.
	* arch/arm/src/lpc31xx and arch/arm/include/lpc31xx:  Renamed from lpc313x
	  to make name space for other famiy members.
	* arch/arm/*/lpc31xx: Added support for the LPC315x family (untested).
	* sched/task_exithook.c: Functionality performed when a task exits or is
	  deleted has been moved to a common file task_exithook.c.  Now exit()
	  functionality (like flushing I/O and calling registered atexit()
	  functions, etc.) will be performed when a task is deleted as well.
	* mm/:  Added support for CONFIG_MM_SMALL. Each memory allocation has a
	  small allocation overhead.  The size of that overhead is normally
	  determined by the "width" of the address support by the MCU.  MCUs
	  that support 16-bit addressability have smaller overhead than devices
	  that support 32-bit addressability.  However, there are many MCUs
	  that support 32-bit addressability *but* have internal SRAM of size
	  less than or equal to 64K.  In this case, CONFIG_MM_SMALL can be
	  defined so that those MCUs will also benefit from the smaller, 16-
	  bit-based allocation overhead.
	* lib/string/lib_strndup.c: Add standard strndup() library function.
	* net/getsockname.c: Added standard getsockname() to return the local
	  address associated with a socket.
	* lib/stdio/lib_asprintf.c: Add asprintf()
	* configs/olimex-lpc1766stk/ftpc:  Add a configuration to support
	  testing of the FTP client shell.
	* fd/fs_fdopen.c and net/net_checksd.c: Add support so that fdopen may
	  be used with socket descriptors.
	* net/recvfrom.c: Fix an error found in receiving small files via FTP:
	  The small file is received a buffered in the readahead buffer, then the
	  socket is disconnected.  When the app calls recvfrom, the socket is
	  already disconnected and the buffered data is stranded.  Now, recvfrom
	  will continue to return success after the socket is disconnected until
	  the readahead buffer is drained.
	* olimex-lp1766stk/ftpc/defconfig: Many configurations have the MTU
	  (CONFIG_NET_BUFSIZE) set to very small numbers, less then the minimum
	  MTU size that must be supported -- 576. This can cause problems in
	  some networks:  CONFIG_NET_BUFSIZE should be set to at least 576 in
	  all defconfig files.  This has only been fixed in this defconfig file.

6.5 2011-06-21 Gregory Nutt <gnutt@nuttx.org>

	* arch/avr/src/avr and arch/avr/include/avr: Adds general support for
	  the Atmel 8-bit AVR family.
	* arch/avr/src/atmega and arch/avr/include/atmega: Adds support for the
	  Atmel AVR ATMega family.
	* arch/avr/src/at90usb and arch/avr/include/at90usb: Adds support for the
	  Atmel AVR AT90USB family.
	* configs/micropendous3: Adds a board configuration for the Opendous
	  Micropendous 3 board.  This board may be populated with several different
	  members of the Atmel AVR AT90USB family.
	* configs/amber: This is a placehold for the Atmel ATMega128 Amber Web
	  Server from SoC Robotics.  Not much present in this directory on initial
	  check-in.
	* configs/teensy: Adds a board configuration for the PJRC Teensy++ 2.0 board
	  that features an Atmel AT90USB1286 MCU.
	* fs/fat: Offsets, sector numbers, etc. need to be off_t, not size_t.  size_t
	  is intended to be the maximum size of a memory object, not a file offset. This
	  does not make any difference except on systems (like the AVR) where size_t
	  is only 16-bits.

6.6 2011-07-11 Gregory Nutt <gnutt@nuttx.org>

	* drivers/mtd/ramtron.c, net/net_checksd.c, fs/fs_fdopen.c, and include/nuttx/mii.h:
	  Several structural changes made to get a clean compile under the ez80 ZDS-II
	  toolchain (no design changes).
	* drivers/usbhost/usbhost_storage.c: Incorpated bugfixes reported by Sheref H.
	  Younan:  (1) Read capacity logic read largest block, not the number of blocks
	  and was, therefore, off by one, and (2) Some devices stall of get Max LUN request
	  if they support only a single LUN.  Logic now assumes a single LUN if the get
	  Max LUN request fails.
	* include/nuttx/arch.h, lib/stdio/lib_libvsprintf.c, lib/stdio/lib_fputs.c: Add
	  a new configuration option to support extracting strings from FLASH or EEPROM
	  or other memories where the string data cannot be accessed by simply de-referencing
	  a string pointer.
	* arch/sim/src/up_romgetc.c: Used to test the basic logic to access strings
	  without directly de-referencing a string pointer.
	* arch/avr/src/avr/up_romget.c: Used to access strings that lie in the first
	  64K of FLASH (But I still haven't figured out how to get strings to reside in
	  FLASH without using the PROGMEM attribute).
	* configs/teensy/src/up_spi.c: Correct reading of SD CD and WP pins (was reading
	  the wrong register.  AVR SPI now appears to be functional.
	* arch/avr/src/at90usb/at90usb_usbdev.c: Correct USB initialization.  Interrupts
	  were being enabled BEFORE the interrupt handler was attached.
	* configs/sure-pic32mx:  Add a configuration for the Sure Electronics, "Advanced USB
	  Storage Demo Board," Model DB-DP11215 (http://www.sureelectronics.net/goods.php?id=1168).
	  This board features the MicroChip PIC32MX440F512H MCU. (Untested on initial
	  check-in).
	* configs/stm3210e-eval/nsh2:  Add another NSH configuration for the STM32 with
	  some different properties.
	* CONFIG_NSH_CONDEV:  Add a configuration option to allow using a different character
	  device (such a a different UART) for the NSH interface.  This allows, for example,
	  debug output to come from the console device while using another device for NSH.
	  There are some issues on initial check-in:  NuttX doesn't have termios and the
	  console device has special properties that make using NSH awkward.  Examples:
	  No CR-LF expansion, no character echoing, no command line editting.
	* arch/arm/src/stm32/stm32_lowputc.c and stm32_serial.c.  Correct several bugs
	  involving serial port configuration.  These bugs are only critical if you
	  are trying to using multiple UARTs on STM32.
	* configs/stm3210e-eval/src/up_lcd.c:  Add a driver for the STM3210E-EVAL's LCD.
	* configs/stm3210e-eval/nx:  Add NX configuration for the STM3210E-EVAL.
	* configs/nuttx/arch.h (and arch/arm/src/stm32, configs/*/src/up_buttons.c):
	  Standardize interfaces exported for button support and button interrupts.
	* configs/stm3210e-eval/src/up_buttons.c:  Add interrupting button support.
	  Also fixes a few errors in STM3210E-EVAL button decoding.
	* configs/stm3210e-eval/buttons: Add a configuration to exercise STM3210E-EVAL
	  buttons.
	* arch/arm/src/stm32/stm32_gpio.c:  GPIO interrupt handling for pin
	  numbers were being aliased:  5-9 together and 10-15 together.  Extended
	  the logic to peform decoding of GPIO interrupts and unique dispatching
	  for all 16 pins.
	* configs/stm3210e-eval/nxtext: Add a configuration for the apps/examples/nxtext
	  example.  This example focuses on placing text on the background while
	  pop-up windows occur.  Text should continue to update normally with or without
	  the popup windows present.
	* arch/arm/src/common/up_checkstack.c:  ARM stack overflow checking submitted
	  by Hal Glenn.
	* arch/arm/src/lpc17xx: Changes to compile successfully with no serial console
	  (also submitted by Hal Glenn).
	* graphics/nxfonts/nxfonts_convert.c:  Fixed a critical bug that caused
	  when renderer some fonts with bits-per-pixel > 8
	* graphics/nxbe/nxbe_move.c: Fixed an error in the graphics move logic (This
	  was a previously untested interface).  Basically, there is some confusion
	  between use of (x,y) as a relative offset or as an absolute position.
	* graphics/nxbe/nxbe_close.c:  Fixed an important graphics system bug:
	  When a window is closed, the display was not being updated.  The old
	  window graphic was left on the display for a time.

6.7 2011-08-02 Gregory Nutt <gnutt@nuttx.org>

	* Makefile:  Added a export target that will bundle up all of the NuttX
	  libraries, header files, and the startup object into an export-able
	  tarball.
	* arch/arm/src/lpc17xx/lpc17_can.h:  Correct some typos in the CAN
	  register definitions.
	* drivers/serial/serialirq.c:  Correct an error that can occur if the
	  serial RX buffer becomes full.  Data is now discarded in that case;
	  before, leaving data in the hardware would cause infinite interrupts
	  one most MCUs since you must read the data in order to clear the
	  interrupt.
	* arch/arm/src/lpc17xx/lpc17_can.c:  Added a CAN driver contributed by
	  Li Zhuoyi (Lzyy).
	* include/stddefs.h and sys/types:  Added type wchar_t.
	* fs/fat/fat_fat32dirent.c:  Move all FAT directory operations to this
	  new file; Implement VFAT long file name support.
	* fs/fat/fat_fat32dirent.c:  The configuration CONFIG_FAT_LCNAMES has
	  been around for some time but never tested until now.  This setting
	  will mimic the NT 8.3 file name behavior:  File names or extensions
	  may be all upper or all lower case (but not mixed).  If
	  CONFIG_FAT_LCNAMES is not selected, all filenames are strictly upper
	  case.
	* configs/stm3210e-eval/nsh2:  Console is back on UART1; Added
	  examples/nx as an NSH "built-in" command as a demonstration.
	* fs/fat/fs_fat32dirent.c:  Fix an important bug in the directory
	  allocation (fat_allocatedirentry()).  I looks like it could be
	  initializing the wrong sectors! NOTE:  This function was in
	  fs_fat32utils.c in earlier releases.
	* arch/arm/src/stm32_sdio.c: Correct an important DMA-related bug;
	  SDIO transfer completion events and DMA completion eventes were
	  not being coordinated correctly.
	* configs/stm3210e-eval/nsh2: Enable FAT long file name support
	* sched/sem_timedwait.c: Add the standard sem_timedwait() interface.
	* graphics/nxfonts/nxfonts_getfont.c, nxfonts_bitmap.c,
	  Makefile.source, and include/nuttx/nxfonts.h: Support for multiple
	  fonts included.  A new interface, nxf_getfonthandle() takes a font
	  ID and returns a handle that is now used at all other font interfaces
	  to specify which of the multiple fonts to use.
	* arch/arm/src/lpc17xx/lpc17_syscon.h: Fix typo (reported by Li Zhuoyi).
	* configs/stm3210e-eval/nsh2: Extended to support two new commands:
	  'msconn' will connect the USB mass storage device; 'msdis' will
	  disconnect the USB storage device.
	* tools/bdf-converter.c.  This C file is used to build the bdf-converter
	  program.  The bdf-converter program be used to convert fonts in Bitmap
	  Distribution Format (BDF) into fonts that can be used in the NX graphics
	  system.
	* include/nuttx/nx:  Move all NX header files from include/nuttx to
	  include/nuttx/nx.
	* drivers/usbdev/usbdev_usbstorage.c and arch/arm/src/stm32/stm32_usbdev.c:
	  Correct a memory leak when the USB mass storage driver is connected and
	  then disconnected from the target.  The write requests were not being
	  freed.  NOTE that the unregister logic in the STM32 needed to call
	  stm32_reset() in order to return the write requests to the USB mass
	  storage driver; it is possible that a similar but could exist for other
	  architectures.
	* graphics/nxfonts/nxfonts_*.h:  Add serveral more new fonts
	* arch/z80/src/ez80/ez80_serial.c: Fix some errors in serial driver
	  setup for UART1 (submitted by Paul Osmialowski).
	* drivers/input/tsc2007.c and include/nuttx/input/*:  Add a generic NuttX
	  touchscreen interface.  Add a driver for the TI TSC2007 touchscreen
	  controller.
	* graphics/nxglib/lcd and fb:  Add low level routines to set single pixels.
	* lib/math/lib_b16atan2.c:  Add a fixed precision atan2() function
	* graphics/nxglib/nxglib_splitline.c: Add logic to divide a wide line into
	  trapezoidal components.
	* graphics/nxmu/nx_drawline.c, graphics/nxsu/nx_drawline.c,
	  graphics/nxtk/nxtk_drawlinewindow.c, graphics/nxtk/nxtk_drawlinetoolbar.c:
	  Add new line drawing interfaces (untested).

6.8 2011-08-19 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/lpc17xx/chip.h:  Fix some chip memory configuration errors
	  for the LPC1764, LPC1756, and LPC1754 (submitted by Li Zhuoy (Lzyy))
	* arch/arm/src/lpc17xx/lpc17_can.h:  Revised CAN driver submitted by
	   Li Zhuoy (Lzyy).  The driver now supports both CAN1 and CAN2.
	* arch/arm/sim/up_lcd.c: Add a simulated LCD driver.
	* configs/stm3210e-eval/nxlines:  Added a configuration to build
	  examples/nxlines.
	* arch/graphics: Used apps/examples/nxlines to (finally) verify the NX
	  trapezoid drawing functions and (wide) line drawing functions.
	* arch/rgmp and configs/rgmp.  Yu Qiang has ported RGMP to the OMAP4430 (arm)
	  pandaboard and release the new RGMP 0.3 version. The main changes are: (1)
	  Separate configs/rgmp/x86 and configs/rgmp/arm configuration directory, and
	  (2) Extract architecture dependent code in arch/rgmp/include and
	  arch/rgmp/src into corresponding x86/ and arm/ directories.
	* arch/arm/src/kinetis, arch/arm/include/kinetis, configs/kwikstick-k40:
	  Add a directory structure to support the port to the Kinetis KwikStik-K40.
	  There is no real substance in the initial check-in; only the directory
	  structure and skeleton files (Code complete on 8/15/11).
	* arch/arm/include/armv7-m, arch/arm/src/armv7-m, etc.: Rename all cortexm3
	  directories and files to armv7-m; Change name of of all CORTEXM3 constants
	  to ARMV7M.  This is a major namespace change needed to cleanly support the
	  ARM Cortex-M4 which is also in the ARMv7 M Series (specifically, ARMv7E-M).
	* sched/sig_initialize.c, sig_received.c, and mq_waitirq.c.  Fixed several
	  critical bugs related to signal handling initialization and for signals
	  the wake up tasks that are waiting to send or receive message queues.  In
	  the first two files, errors would prevent proper allocation of signal-related
	  structures from interrupt handlers.  In the second, there was missing
	  "clean-up" logic after a signal occurred, leaving the message queue in
	  a bad state and resulting in PANICs.  All are important.  (submitted by
	  hkwilton).
	* arch/arm/src/kinetis:  Added header files defining all Kinetis registers
	  and bit fields within all Kinetis registers.
	* configs/twr-k60n512:  Add support for the Kinetis K60 Tower board
	  (TWR-K60N512).
	* drivers/can.c:  Fixed a semaphore overflow problem in the CAN driver
	  (reported by Li Zhouy (Lzyy)).
	* 8/18/2011: The basic port to the FreeScale Kinetis TWR-K60N512 board is
	  now functional.
	* configs/twr-k60n512: Add Kinetis TWR-K60N512 NSH configuration.
	* drivers/analog and include/nuttx/analog: Add ADC driver infrastructure
	  and TI ADS1255 driver developed and submitted by Li Zhouy (Lzyy)).
	* arch/arm/stm32/stm32_sdio.h and drivers/mmcsd/mmcsd.c:  Add logic to
	  multiplex usage of the GPIO pins (contributed by Uros Platise).
	* configs/twr-k60n512/nsh:  Added and verified a NuttShell (NSH)
	  configuration for the Freescale, Kinetis TWR-K60N512 board.

6.9 2011-09-11 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/kinetis/kinetis_sdhc.c: SDHC driver for Kinetis parts.
	  Initially check-in is just a crude port of the STM32 SDIO driver.
	  Much more work is needed.
	* graphics/, include/nuttx/nx:  Add new NX interfaces for drawing
	  circles -- both circular outlines and filled circles.
	* graphic/nxglib/nxglib_spitline.c:  Add a "fudge factor" that eliminates
	  some problems for rendering nearly horizontal, wide lines.  Hmm...
	  but I suspect this fudge factor also leads to new problems rendering
	  very thin, nearly horizontal lines.  More tuning is needed.
	* drivers/analog, include/nuttx/analog, arch/arch/src/lpcxx:  (1) Add
	  updates to the ADS1255 driver, (2) fix errors from my last merge (sorry),
	  (3) Add DAC infrastructure, (4) add AD5410 DAC driver, and (5) add
	  LPC17xx ADC and DAC drivers.  All contributed by Li Zhuoyi (Lzyy).
	* tools/mkexport.sh:  Extended the script that implements the top-level
	  'make export' logic.  The script now also finds and bundles up all of
	  the architecture-specific header files as well.
	* drivers/arch/arm/src/stm32/stm32_i2c.c:  Add a reset to the I2C
	  initialization logic to prevent spurious interrupts when the I2C
	  interrupts are enabled (submitted by Uros Platise).
	* Scripts/makefiles/documents.  Several adjustments, corrections and
	  typo fixes so that NuttX will build correctly on FreeBSD using the
	  ASH shell (submitted by Kurt Lidl).
	* drivers/mtd/flash_eraseall.c:  Add a callable function that accepts
	  the path to a block driver and then erases the underlying FLASH memory
	  (assuming that the block driver is an MTD driver wrapped in the FTL
	  layer).  Hmmm... this is probably not the best long term solution;
	  flash_eraseall() should be a user-callable function that operates
	  one driver interfaces; not an internal, OS function that operates
	  on directly on block drivers.
	* drivers/bch:  Fixed some important bugs in the BCH driver (noted by
	  Li Zhuoyi (Lzyy)).  This would have effected any large reads or writes
	  (larger than the hardware sector size).
	* arch/*/src/Makefile:  Use of -print-libgcc-file-name to get path to
	  libgcc.a may select the wrong libgcc.a if a multilib toolchain (like
	  CodeSourcery) is used. This can be a serious problem and can cause
	  crashes on Cortex-M3 if the ARM libgcc is used, for example.  The fix
	  is to include ARCHCPUFLAGS on the gcc command line when asking it to
	  -print-libgcc-file-name.
	* lib/time/lib_gmtimer.c:  Correct several calculations that could lead
	  to errors in dates.
	* drivers/pm: Add the beginnings of a NuttX power management sub-system.
	* arch/arm/src/stm32/stm32_irq.c:  Fix a error introduced in 6.8.
	  Timeout calculation uses clock_settime() instead of clock_gettime().
	  Pretty gross error, but actually it works with the side effect of setting
	  a bad time.
	* drivers/mtd/at24xx.c: Driver for I2C-based at24cxx EEPROM submitted by
	  Li Zhuoyi (Lzyy).
	* arch/arm/src/lpc17xx/lpc17_i2c.c: I2C driver for the NXP LPC17xx family
	  submitted by Li Zhuoyi (Lzyy)
	* arch/arm/src/stm32_i2c.c:  Correct two issues with the STM32 I2C driver:
	  (1) Clocking needs to be based on PCLK1, not HCLK and fast speed settings
	  need some additional bits; and (2) Correct a hang that will occur on
	  I2C1 if FSMC is also enabled.
	* drivers/sensors/lm75.c and include/nuttx/sensors/lm75.h:  Add an LM-75
	  temperature sensor driver.
	* configs/stm3210e-eval/src/up_lm75.c:  Add support for the LM-75 on the
	  STMicro STM3210E-EVAL board.
	* sched/clock_gettime.c:  Correct an error in the tv_nsec calculation
	  that happens only config CONFIG_RTC is enabled.
	* arch/arm/src/stm32/stm32_i2c.c:  Correct some bugs related to waiting
	  for the I2C STOP condition to be cleared.

6.10 2011-10-06 Gregory Nutt <gnutt@nuttx.org>

	* lib/stdio/lib_fopen.c:  Fix an error in fopen(); the file pointer was not
	  being positioned at the end of the file when the "a" and "a+" modes are
	  used.  There are other issues with the "a+" modes (see the top-level TODO
	  list).
	* drivers/usbdev/cdc_serial.c and include/nuttx/usb/cdc.h and cdc_serial.h:
	  Add support for the CDC ACM serial device class.
	* fs/fat/fs_fat32.c: Fix a critical bug in the write logic:  It a tiny write
	  cross a sector boundary, then two sector writes will occur.  The first part
	  in the first sector may be written to the wrong sector number.
	* fs/fat/fs_fat32util.c:  Fix a stray write into the FAT (always sector 964 on
	  FAT32).  This bug will cause some lost chains.  I'm sure this bug could
	  corrupt files but at present, the only thing I have seen is that before
	  fixing this bug, the Windows chkdsk utility would report these lost chains.
	* arch/arm/src/stm32/stm32_i2c.c: Driver can now operate in a faster polled
	  mode (at the expense of using more cpu cycles).
	* arch/arm/src/stm32/stm32_i2c.c: Add trace debug capability.  Enabled with
	  CONFIG_I2C_TRACE.
	* arch/arm/src/stm32/stm32_i2c.c: Fix another bug where I2C conflicts with FSMC
	  being enabled.  That time at the tail end of the transaction where there is
	  an unfinished stop condition.
	* sched/mq_timedreceive.c and sched/mq_timedsend.c:  The count of threads
	  waiting on the message queues was not being decremented after a timeout.
	  This would cause the accounting logic to become out of sync and the, perhaps,
	  an assertion to be triggered.  This is an important bug and fixes a
	  potential crash when using mq_timedreceived() and mq_timedsend().
	* sched/mq_sndinternal.c: Related to the above, the send logic was incrementing
	  the wrong counter when it waited as part of the mq_timedsend.c logic.
	* fs/fat:  Fix an error in the long file name logic:  If the long file name
	  is an even multiple of 13 bytes in length, then it should not include a
	  NULL terminating character.  Fix contributed by Kaushal Parikh.
	* configs/sim/nx11: Created a separate configuration to build the NX
	  example using the a simulated framebuffer driver on an X11 window.  This
	  example has been verified on Ubuntu 9.09 (it does not work on Cygwin).
	* arch/sim/src/up_touchscreen.c and up_x11eventloop.c: Adds support for a
	  simulated NuttX touchscreen device using mouse/pointer feedback from an
	  x11 window.
	* configs/sim/touchscreen: Adds a configuration to verify the simulated
	  touchscreen driver (Does not work on Cygwin).
	* configs/sam3u/touchscreen: This is the configuration that I plan to use
	  to verify the SAM3U-EK touchscreen driver.  However, as of this writing,
	  there is no touchscreen driver for the board.
	* CONFIG_RTC_HIRES: Add an option to support either a high-resolution RTC
	  that completely replaces the system timer tick but may overflow and lose
	  time when the MCU is off and also for a low-resolution (1 sec/tick) RTC
	  that can run until 2106 with no overflow.  But in this latter case, higher
	  resolution time must come from the system timer.
	* CONFIG_SYSTEM_UTC: Removed support for the UTC system timer.  It just
	  doesn't do enough to be worth the CPU cycles or the complexity.
	* CONFIG_SYSTEM_TIME16: Added support for an optional 64-bit system timer.
	* fs/fat/fs_fat32util.c: Add support for FAT date/time stamps; Enabled via
	  CONFIG_FS_FATTIME.
	* arch/arm/src/sam3u/sam3u_spi.c: Add an SPI driver for the AT91SAM3U.
	* drivers/input/ads7843e.c and include/nuttx/input/ads7843e.h: Add a
	  driver for the TI ADS7843E touchscreen controller.
	* fs/nxffs/nxffs_open.c:  Fix an error when a file is open for writing; since
	  the file will get deleted it is already exists, there must be a check if
	  there are other open references to the file.
	* arch/arm/src/stm32/stm32_sdio.c: Fixed an error where during SDHC
	  initialization interrupts were not being re-enabled.  Caused more subtle
	  errors than you would think.
	* arch/arm/src/stm32/stm32_i2c.c:  Fixed an error where I2C timeouts appeared
	  to be successful transfers.
	* configs/sim/nsh2: Add another simulated NSH configuration.  This one
	  supports X11 graphics, C++, and exercises graphic functions as built-in
	  commands.

6.11 2011-11-12 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/stm32/Make.defs:  Don't build stm32_rtc.c if CONFIG_RTC is not
	  selected.  Doing so will cause errors if other configuration dependencies
	  are not met.
	* configs/stm3210e-eval/src/up_lcd.c:  Color corrections for SPFD5408B LCD
	  do not work with R61580 LCD.
	* configs/pic32-starterkit: Beginning of a configuration for the Microchip
	  PIC32 Ethernet Starter Kit.  Hmmm.. I don't have a clue how to test this
	  with no serial port?!
	* lib/stdio/lib_fclose.c: fclose() always returns an error (EOF) when it
	  closes a read-only file.  This is because it calls flush() which will
	  fail on read-only files.  No harm is done other that a bad value is
	  returned.
	* arch/sim/src/Makefile: Correct build issue for sim/nsh2 target.  Old
	  libboard.a was not being cleaned.
	* arch/mips/src/pic32mx/pic32mx-gpio*.c:  Add GPIO support for the PIC32MX.
	* configs/sure-pic32mx/src/up_leds.c and up_buttons.c:  Add button and LED
	  support for the Sure Electronics PIC32MX board.
	* configs/ea3152:  Add a configuration for the Embedded Artists LPC3152
	  daughter board (with the same base-board used with configs/ea3131)
	* graphics/nxmu/nx_getrectangle.c, graphics/nxsu/nx_getrectangle.c,
	  graphics/mxtk/nx_getwindow.c, graphics/nxmu/nx_gettoobar.c:  New
	  interfaces to read from graphics memory
	* graphics/nxbe/nxbe_bitmap.c: Fix an error in the error handling that
	  can cause valid bitmaps to fail to render.
	* include/nuttx/video/rgbcolors.h: Fix errors in some 16- and 8-bit color
	  conversion macros.
	* tools/incdir.sh: Fix issues when g++ is used as the compiler.  It was
	  not being recognized and handled properly.
	* graphics/nxsu/nx_releasebkgd.c: Fix a bad cast that was causing
	  problems with the background window was released.
	* fs/nxffs/nxffs_pack.c:  Correct a critical bug in the NXFFS file system:
	  When repacking the filesystem, there was a missing check to see if an
	  inode structure would fit at the end of a block.  This is a rare case
	  if the block size is large, but can be common for tiny block sizes
	  and results in a crash and file system corruption.
	* fs/nxffs/nxffs_initialize.c:  Fix an initialize error.  If the FLASH
	  is full on power-up, NXFFS will fail to initialize correctly.
	* fs/nxffs/nxffs_write.c and nxffs_pack.c:  Fix an error that can occur
	  when attempt to write to FLASH volume that is completely full but
	  has no value inodes on it.
	* drivers/mtd/at24xx.c:  Now supports a configurable block size that
	  supports using "clusters" of AT24 pages as blocks.  This allows bigger
	  block sizes and more efficient use of EEPROM when the AT24 is used to
	  support a file system (such as NXFFS). (Contributed by Hal Glenn).
	* include/nuttx/video/rgbcolors.h: More fixes to RGB color conversion
	  macros.
	* arch/arm/src/common/up_createstack.c and up_usestack.c:  For ARM EABI
	  the stack must be aligned to 8-byte boundaries.  This is necessary for
	  passing aligned floating point values under EABI.  Fix contributed by
	  David Sidrane.
	* Numerous changes and fixes to the PIC32 interrupt handing logic. The
	  PIC32 port is almost complete but still not ready for prime time.

6.12 2011-12-06 Gregory Nutt <gnutt@nuttx.org>

	* fs/fat/fs_fat32util.c and fs_fat32.h: Logic extended to look in up to
	  four partitions for a valid FAT file system.
	* drivers/input/tsc2007.c: Add support for 8-bit conversions; make sure
	  that A/D converters are active before requesting conversions.
	* drivers/mmcsd0/mmcsd_sdio.c: Increase capacity variable from size_t
	  to uin64_t (if available) so that SD cards with capacities greater
	  than 4Gb can be supported.
	* fs/fat/fs_fat32dirent.c: The root directory structure is different
	  from other directories.  When formatted by Windows, it is not initialized
	  at all.  Some additional special handling is required to initialize the
	  root directory entry to interoperate correctly with windows.
	* fs/fat/fs_fat32util.c: In fat_systime2fattime(void) should be
	  clock_gettime() and not clock_gettime().  Also, there is a place where
	  FAT date is used instead of FAT time. (Thanks to David Sidrane).
	* arch/arm/src/stm32 and arch/arm/include/stm32:  Add support for the
	  STM32F40xxx family of MCUs.
	* configs/stm3240g-eval:  Add framework for the STMicro STM3240G-EVAL
	  board.
	* include/sys/types.h:  wchar_t is a builtin type in C++ and its
	  declaration can cause errors with certain C++ compilers.
	* sched/sig_timedwait.c:  Fix signal handling when the returned info
	  is NULL.  Before this change, it would derefence a NULL pointer
	  in this case.
	* graphics/nxfonts/nxfonts_sans17x22.h and nxfonts_sans20x26.h:  Add
	  some very small sans serif fonts.
	* graphics/nxfonts/nxfonts_sans17x23b.h and nxfonts_sans20x27b.h:  Add
	  corresponding sans serif bold fonts.
	* drivers/input/ads7843e.c and tsc2007.c:  Fix some errors in the poll
	  setup error checking that was cloned into both drivers.
	* sched/mq_notify.c:  Set errno appropriately on failures.  There are
	  still several message queue functions that do not set errno!
	* arch/arm/src/stm32: Fixes to several STM32F40xxx files (contributed by
	  Mikhail Bychek).
	* configs/stm3210e-eval/src/up_lcd.c:  Fix banding problem on the R61580
	  LCD
	* configs/stm3240g-eval/ostest:  The basic STM32F40xx bringup is functional
	  (11/12/06) for the STM3240G-EVAL board and passes the OS test.
	* configs/stm3240g-eval/nsh:  Adds a NuttShell (NSH) configure for the
	  STM3240G-EVAL board.

6.13 2011-12-26 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32/stm32f40xxx_dma.c:  Add DMA support for the STM32 F4
	  family (untested on initial check-in)
	* arch/arm/src/armv7-m/up_fpu.c:  Add logic for saving an restoring VFP
	  floating point registers on context switches (but also disable the FPU
	  because CodeSourcery doesn't support hard flowing point!)
	* arch/arm/src/stm32/chip/stm32_eth.h:  Add Ethernet register definitions
	  for the STM32 F4.
	* arch/arm/srcm/stm32/stm32_eth.c:  Adds an Ethernet driver for the STM32 F4.
	* arch/arm/srcm/stm32/stm32_dac.c and stm32_adc.c: "Skeleton" files for STM32
	  DAC and ADC drivers.  The actual logic will come later.
	* arch/arm/srcm/stm32/stm32_eth.c:  There may be a few more lurking bugs, but
	  the STM32 Ethernet driver appears to be fully functional on the STM3240G-EVAL.
	* arch/arm/srcm/stm32/stm32_eth.c:  Fix an error in clearing abnormal interrupt
	  events.
	* configs/stm3240g-eval/dhcpd:  Add a DCHP daemon configuration for the
	  STM3240G-EVAL board.
	* configs/stm3240g-eval/nettest:  Add a network test configuration for the
	  STM3240G-EVAL board.
	* arch/arm/srcm/stm32/stm32_rtc.c, stm32f10xxx_rtc.c, and stm32f40xxx_rtc:
	  Broke out separate drivers to handle the very different RTC implementations
	  in the STM32 F1 and F4 family.
	* arch/arm/srcm/stm32/stm32f10xxx_rtc.c:  STM32 F4 RTC is functional (12/14/2011)
	* net/uip-arp.c: Fix compilation issue with CONFIG_NET_ARP_IPIN
	* include/nuttx/pwm.h and drivers/pwm.c:  Add an interface definition and a
	  "upper half" driver for PWM output.
	* arch/arm/src/stm32/stm32_pwm.c:  Added a PWM "lower half" driver for the
	  STM32.  The initial check-in is little more than a framework for the driver.
	* arch/arm/src/stm32/stm32_usbdev.c:  Corrected two CRITICAL errors in the USB
	  device-side driver:  (1) Handling of data overrun condition was wrong.  When
	  there was no further memory to accept further OUT endpoint data, the driver
	  would hang with infinite interrupts; (2) the logic in setting toggle bits
	  was not correct.  However, this driver has functioned for a long time until
	  the particular condition that revealed the bug occurred.  My impression is
	  that this latter bugfix also fixes some STM32 USB performance problems.
	* configs/hymini-stm32v: A configuration for the HY-Mini STM32v board contributed
	  by Laurent Latil.  These changes also include support for the STM32F103VCT6.
	* arch/configs/stm3240g-eval/src/up_pwm.c:  Add hooks needed to use the new
	  apps/examples/pwm test of the STM32 PWM  driver.
	* drivers/mtd/mp25x.c:  Add ability to use different SPI modes and different
	  manufacturers codes.  Fix a error in the wait for not busy (submitted by
	  Mohammad Elwakeel.
	* arch/arm/src/stm32/stm32_can.c:  Add a low-level STM32 CAN driver. (Initial
	  check is incomplete).  Add loopback support to the driver.
	* arch/arm/src/stm32/stm32_adc.c:  The ADC is now functional.  A more complete
	  driver would require DMA support.  I have some questions still about the
	  accuracy of the timer-driven sampling.
	* configs/sure-pic32mx/nsh:  The PIC32 port is (finally) functional.  Add an
	  NSH configuration for the Sure PIC32MX board.
	* configs/sure-pic32mx/*/defconfig.  Calibrated all PIC32 delay loops.
	* configs/pcblogic-pic32mx/nsh:  Add an NSH configuration for the PCBLogic
	  PIC32 board.
	* Both PIC32 OS test and NSH configurations have now been verified.

6.14 2012-01-15 Gregory Nutt <gnutt@nuttx.org>

	* tools/Makefile.export, mkexport.sh, and configure.sh:  Changes submitted
	  by Mike Smith to support configuration and 'make export' on MAC OS.
	* arch/arm/src/stm32/stm32_gpio.c:  Disabled interrupts while configuring
	  GPIO pins so that we have exclusive access to the GPIO configuration
	  registers.
	* arch/mips/src/pic32mx/pic32mx_usbdev.c:  Add a USB device-side driver
	  for the PIC32MX family.
	* arch/arm/src/stm32/stm32_gpio.c:  Correct an error in some of the GPIO
	  initialization logic.  Fix submitted by Mike Smith.
	* configs/olimex-lpc1766stk/src/up_leds.c:  Add new interfaces so that is
	  CONFIG_ARCH_LEDS are not set, the LEDs may be controlled from application
	  logic.
	* configs/olimex-lpc1766stk/src/up_buttons.c:  Add support for the buttons
	  on the Olimex LPC1766-STK board.
	* Makefile:  Added 'apps_clean' and 'apps_distclean' target to simplify
	  managing the state of the application directory while in the NuttX directory
	* Documentation/NuttXGettingStarted.html:  Added a "Getting Started" Guide
	  for NuttX.  At present, this is just a stub and it refers to the NuttX
	  top-level README.txt file which is the only, real "Getting Started" Guide
	  that exists at the time being.
	* arch/arm/src/lpc17xx/lpc17_gpioint.c:  Correct an value used as the lower
	  end of an IRQ number range test.
	* arch/arm/src/lpc17xx/lpc17_gpio.c:  Fix a integer flow problem in shift.
	  This error would prevent pins > 15 from being used as interrupt sources.
	* arch/arm/src/stm32/stm32_can.c:  The CAN driver has been verified in
	  loopback mode on the STM3240G-EVAL board.
	* configs/stm3240g-eval/src/up_adc.c: Complete coding of ADC support for the
	  potentiometer on board the STM3240G-EVAL.
	* arch/arm/src/lpc17_can.c:  Several CAN driver improvements. Adds support for
	  testing in loopback mode.  now uses all three transmit buffers for better
	  performance.
	* configs/olimex-lpc1766stk/nsh:  Now supports the CAN loopback test as an
	  optional "built-in" application.
	* sched/irq_attach.c:  Fix an issue with disabling interrupts when they are
	  detached.  For the PIC32, this can't be done because there is a 1-to-many
	  relationship between vector numbers and interrupt numbers or different.
	  Added a new configuration option CONFIG_ARCH_VECNOTIRQ to at least flag
	  the architectures that have this issue and to (at least) avoid doing
	  something too wrong.
	* drivers/can.c:  Fix a test for buffer full in the generic, "upper half",
	  can driver.
	* arch/arm/src/lm3s: Add support for the LM3S6432S2E (Contributed by Mike Smith)
	* configs/lm3s6432-s2:  Add support for the TI RDK-S2E (LM3S6432S2E) board
	  (Contributed by Mike Smith)
	* configs/stm3240g-eval/src: Add APIs support to support user access to the
	  LEDs
	* arch/arm/src/lpc17xx/lpc17_can.c: Add logic to change the CAN bit rate based
	  on the NuttX configuration.
	* arch/arm/src/lpc17xx/lpc17_can.c: PCLK divisor is now a configuration
	  option.
	* arch/arm/src/stm32/stm32_serial.c and stm32_lowputc.c:  Support for
	  UART4-5 and USART6 added by Mike Smith.  Also includes a more flexible
	  way of managing UART pin configurations.
	* include/nuttx/pwm.h, drivers/pwm.c, arch/arm/src/stm32/stm32_pwm.c:  Add
	  support for pulse count in order to better support stepper motors.
	* arch/arm/src/stm32/stm32_dumpgpio.c: Checking wrong register to see if
	  GPIO is enabled.  Also not adding the GPIO base address to several offsets.
	* configs/stm32f4discovery:  Port to the STMicro STM32F4Discovery board
	  (Contributed by Mike Smith).
	* fs/fat/fs_fat32util.c:  On a failure to recognize a FAT file system, the
	  mount logic should return -EINVAL, not -ENODEV.
	* arch/arm/src/stm32/stm32_tim.c:  Support for STM32 F4 32-bit timers
	  (Contributed by Mikhail Bychek)
	* lib/stdio/lib_vsprintf.c:  Add support for fixed-size fields with floating
	  point numbers (Contributed by Mikhail Bychek)

6.15 2012-02-12 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32/stm32_pwm.c:  Pulse count was limited to 128; now is
	  (essentially) unlimited.
	* configs/stm3240g-eval/include/board.h:  Input frequencies wrong for all but
	  one APB2 timer.
	* arch/mips/src/pic32mx/pic32mx-ethernet.c:  The PIC32 Ethernet driver is
	  code complete, but still untested.
	* configs/sim/*/Make.defs and arch/sim/src/Makefile:  Add support for building
	  a 32-bit executable on a 64-bit Linux target.
	* configs/sure-pic32mx/src/up_leds.c:  Correct GPIOs used for LEDs. The wrong
	  pins were being used.
	* arch/arm/src/stm32/chip/stm32f10xxx_gpio.h: Correct offset to one AFIO EXICR
	  register.
	* arch/arm/src/lpc17xx/lpc17_can.c:  Added "advanced" configuration options
	  to specify the CAN TSEG1 and TSEG2 clock counts specifically.
	* include/nuttx/can.h and drivers/can.c:  Add support for extended (29-bit)
	  CAN IDs.
	* arch/arm/src/lpc17xx/lpc17_can.c:  Add support for extended (29-bit) CAN IDs.
	* arch/arm/src/stm32/stm32_can.c:  Add support for extended (29-bit) CAN IDs.
	* include/nuttx/power/pm.h:  Move include/nuttx/pm.h into a sub-directory named
	  power.
	* drivers/power:  Rename the drivers/pm directory to power
	* include/power/battery.h and drivers/battery.c:  Add the interface definitions
	  for an upper and lower half battery driver.  Add the implementation of the
	  common upper half battery driver.
	* drivers/power/max1704x.c:  Add a driver for MAX17040x battery "fuel gauge"
	* arch/arm/src/stm32/stm32_i2c.c: Add support for I2C3
	* drivers/usbdev/: Lots of name changes: cdc_serial->cdcacm, usbstrg->usbmsc,
	  usbser->pl2303
	* drivers/usbdev/composite: Fleshed out support for a composite USB device.
	* drivers/stm3210e-eval/composite and drivers/stm3210e-eval/src/up_composite.c:
	  Add a configuration test the USB composite device.
	* include/nuttx/usb/usb.h, drivers/usbdev/composite_descriptors.c, and
	  drivers/usbdev/cdcacm_descriptors.c:  Add support for the USB Interface
	  Association Descriptor (IAD)
	* arch/arm/src/stm32/stm32_i2c.c: Correct a typo in STM32 I2C3 support
	  (submitted by Mike Smith)
	* arch/*/src/Makefile:  Candidate solution for dependency issue in the board
	  sub-directory:  By making libboard.a a "phony" target, libboard.a should
	  always rebuilt (the end result is worth the small increase in build time)
	  (submitted by Mike Smith).
	* include/net/psock.h:  Added a new low level socket interface that allows the
	  OS to use the socket interface without having a socket descriptor.
	* include/net/psock.h: Removed psock.h.  The new interfaces are moved into
	  nuttx/net.h which already has similar logic.
	* include/nuttx/usb/usb.h: Can't use 'class' as a field name in USB structures.
	  This upsets C++ if usb.h is included. 'class' -> 'classid' in this header
	  file and all places that referenced 'class'
	* drivers/usbdev/usbmsc.c: Fixed some backward conditional compilation.
	* sched/on_exit.c:  Add support for the on_exit() function.,
	* sched/exit.c, task_exithook.c, task_delete.c, sched_releasetcb.c:  Move
	  the logic that closes file descriptors sooner in the task shutdown sequence.
	  When drivers are closed, they may need to do things that require a fully
	  up-and-running task.  Some things cannot be done later when the task is
	  crippled.
	* lib/dirent: Moved readdir_r() and telldir() from lib/misc to this new
	  directory where they belong.
	* lib/termios.  Implemented tcsetattr() and tcgetattr().
	* lib/stdio/lib_fgets.c:  The old fgets includes some terminal related
	  functionality:  It handles VT-100 commands, includes a command line editor
	  and echo characters back to the terminal.  This old, overloaded fgets()
	  was renamed readline() and moved to apps/system/readline.  The version
	  of fgets() in lib/stdio was them simplified and stripped down so that it
	  *only* gets a string -- as its description implies.
	* arch/arm/src/lpc214x/lpc214x_usbdev.c:  Add corrections suggested by
	  David Hewson many, many months ago.
	* configs/mcu123-lpc214x/composite and configs/mcu123-lpc214x/src/up_composite.c:
	  Add a configuration to test the USB composite device.
	* configs/stm3240g-eval/Telnetd:  Add a configuration for testing the
	  Telnet daemon.
	* configs/stm3240g-eval/nsh2:  This is another NSH configuration.  It differs
	  from the original nsh configuration because it does not have an RS-232
	  console (only a Telnet console) and SDIO is enabled.  This configuration is
	  required because the STM3240G-EVAL board cannot simultaneously support
	  RS-232 and SDIO due to pin conflicts.
	* lib/string/lib_strcasestr.c:  Add strcasestr().
	* lib/stdio/lib_avsprintf.c:  Add avsprintf().
	* lib/net/lib_inetntop.c:  Add inet_ntop().
	* lib/net/lib_inetpton.c:  Add inet_pton().
	* include/pthread.h:  Correct PTHREAD_MUTEX_INITIALIZER.
	* fs/fat/fs_fatfs.c:  Fix an error in the FAT statfs() implementation that
	  was causing some block counts to be reported incorrectly (reported by
	  David Sidrane).
	* drivers/ramlog.c:  Add a character driver that can substitute
	  for /dev/console and or be used for logging debug output when there
	  is no serial port available (such as when a Telnet console is used).
	* lib/stdio/lib_syslogstream:  Add a stream object that will be used to
	  re-direct all debug output to the RAM log if CONFIG_SYSLOG and
	  CONFIG_RAMLOG_SYSLOG are defined.
	* lib/misc/lib_dbg.c: Add an interface enabled with CONFIG_DEBUG_ENABLE that
	  can be used to turn debug output on and off.

6.16 2012-03-10 Gregory Nutt <gnutt@nuttx.org>

	* drivers/sensors/qencoder.c and include/nuttx/sensors/qencoder.h:  Add an
	  implementation for a quadrature encoder upper half driver.
	* arch/arm/src/stm32/stm32_qencoder.c/.h:  Add a initial implementation of
	  a lower-half quadrature encoder driver for the STM32.  On initial check-in,
	  this is little more than a "skeleton" file.
	* Various files:  CAN ISO-11783 support contributed by Gary Teravskis.
	* net/recv.c and net/recvfrom.c: Correct a bug in return value:  The the peer
	  gracefully closes the connections, needs to return zero and not ENOTCONN.
	* arch/arm/src/stm32/stm32_eth.c:  Fix an error in the STM32 ethernet driver.
	  The received buffer size must be two bytes larger to account for the two byte
	  checksum that is appended to the packet.  Otherwise, the last two bytes of
	  real data in the packet will get clobbered.
	* arch/arm/src/stm32f40xx_dma.c:  The STM32 F4 DMA has (finally) been verified
	* arch/arm/src/stm32_sdio.c:  STM32 F4 SDIO DMA is now supported
	* configs/stm3240g-eval/nsh/defconfig: This configuration now supports SDIO
	  with DMA (see configs/stm3240g-eval/README.txt for some issues).
	* arch/arm/src/armv7-m/up_vectors.S and arch/arm/src/armv7-m/up_vectors.S:  New,
	  streamlined Cortex-M exception handling (with FPU supported).  Contributed byh
	  Mike Smith
	* net/accept.c, connect.c,and net_monitor.c:  Correct an error in the accept
	  logic.  After a new connection is made via accept(), monitoring for losses
	  of TCP connection must be set up (just as with connect()).  The new file
	  net_monitor.c holds the common TCP connection monitoring logic used by both
	  the accecpt() and connect() logic.  Contributed by Max Nekludov.
	* net/recvfrom.c and net/uip/uip_tcpcallback.c:  Fix a leak in the TCP
	  read-ahead logic.  This is a *critical* bug fix!
	* net/uip/uip_tcpinput.c:  Correct an error in the TCP stack.  It was
	  incrementing the received sequence number BEFORE determining if the
	  incoming data could be handled.  If the data was dropped (usually because
	  there is insufficient buffering space), then no ACK will be sent and the
	  sequence number will be wrong.  The end consequence of the bad sequence
	  number was that the when the dropped packet was re-transmitted, it was
	  was ignored because its sequence number looked wrong.  Fix was, obviously,
	  to only increment the recevied sequence number if the TCP data was
	  accepted.
	* configs/stm3240g-eval, configs/stm32f40discovery, and arch/*/src/Makefile:
	  Add changes to support building with the Atollic "Lite" toolchain.
	* fs/fs_select.c:  Correct select(), in the case of loss of network
	  connection (POLLHUP), select() must report a read-ready event.  This
	  is how the standard select() interface is supposed to work:  In the case
	  of loss-of-connection, select() reports read-ready.  The next time you
	  read from the socket, you detect the end-of-connection event.  Change
	  submitted by Max Nekludov.
	* arch/arm/src/armv7-m/up_fpu.S and arch/arm/src/stm32/stm32_vectors.S:  Fix
	  lazy FPU register saving with CONFIG_ARCH_FPU is set in the configuration.
	* arch/arm/src/armv7-m:  Lazy saving of floating point registers on context
	  switches now seems to be functional.
	* net/uip/uip_tcpinput.c:  Fix a TCP protocol error reported by Max Nekludov.
	* configs/stm3240g-eval, configs/stm32f40discovery:  Add changes to support
	  building with the Atollic "Pro" toolchain.
	* Makefile:  Use the more common .hex extension for Intel hex files instead of
	  more precise .ihx extension.  This change has ripple effects to many build-
	  related scripts and programs and could cause some short-term problems.
	* configs/stm3240g-eval/, arch/arm/src/stm32/up_allocateheap.c:  Add support
	  for the 16-mbit SRAM on-board the STM3240G-EVAL board.
	* drivers/usbdev/cdcacm.c and include/nuttx/usbdev/cdcacm.h:  The CDC/ACM
	  driver can now be dynamically connected and disconnected from the host
	  under software control.
	* include/nuttx/arch.h, configs/stm3240g-eval/src/up_cxxinitialize.c, and
	  configs/stm3240g-eval/src/up_cxxinitialize.c:  Add support for C++ static
	  initializers.
	* net/setsockopt.c, net/getsockopt.c, net/bind.c, net/socket.c:  Add more
	  low level, thread-independent socket interfaces for use within the OS.
	  Some of these are currently used by the FTP controlling terminal.  More will
	  be used to support the NFS file system currenly underwork.
	* include/nuttx/net/:  Major re-organization of networking headerf files.
	  Moved all non-standard, NuttX-specific header files from include/net and
	  include/nuttx into include/nuttx/net.
	* arch/mips/src/pic32mx/pic32mx_usbdev.c:  The PIC32 USB driver now appears to
	  be fully functional.
	* configs/sure-pic32mx/usbnsh and configs/sure-pic32mx/src:  Add support for
	  NSH using only USB serial I/O to support the console.  This is useful on
	  devices that have USB, but no serial port.
	* arch/mips/src/pic32mx/pic32mx_spi.c:  Add a PIC32 SPI driver.  Initial
	  checkin is primitive, incomplete (lacks interrupt logic), and untested.
	* configs/pic32-startkit/nsh:  Completed verification of the PIC32 Ethernet
	  Starter Kit port.  Added and verified the NuttShell (NSH) on the PIC32
	  Ethernet Starter Kit.  I can now (finally) claim to have complete the
	  basic port to this board.
	* configs/pic32-startkit/nsh/up_usbdev, up_nsh.c, and up_usbterm.c:  Verified
	  the USB (device) driver on the PIC32 Ethernet Starter Kit.
	* arch/mips/src/pic32mx/pic32mx_ethernet.c:  Verified the PIC32 Ethernet
	  driver on the PIC32 Starter Kit.  Status:  It is occasionally functional
	  but not stable enough for use.
	* arch/arm/include/stm32, arch/arm/src/stm32:  Add general support for
	  the STM32 F2 family. Contributed by Gary Teravskis,
	* configs/stm3220g-eval:  Add support for the STMicro STM3220G-EVAL board.
	  Contributed by Gary Teravskis,

6.17 2012-04-14 Gregory Nutt <gnutt@nuttx.org>

	* configs/sure-pic32mx: Add support for the Sure DB-DP11212 PIC32 General
	  Purpose Demo Board
	* arch/arm/src/stm32/stm32_usbhost.c/.h:  Add files that will (eventually)
	  hold an STM32 USB host driver (the initial check-in is the NuttX LPC17
	  USB host driver with name changes only).
	* arch/arm/src/stm32/chip/stm32_otgfs.h:  STM32 USB OTG FS register
	  definitions (not complete on initial check-in).
	* net/connect.c:  Add another low level, thread-independent socket interface
	  for use within the OS.
	* arch/mips/src/pic32mx/pic32mx_ethernet.c:  The PIC32 Ethernet driver
	  is now stable on the PIC32 Starter Kit.
	* configs/pic32-starterkit/nsh2:  Add a PIC32 Ethernet Starter Kit NSH
	  configuration that has no serial console; all interaction is done via
	  Telnet.
	* net/netdev_sem.c:  Correct a deadlock condition by making a seamphore
	  recursive.  To my knowledge this deadlock only occurs when running the
	  NSH command ifconfig over Telnet.  In that case the function netdev_foreach
	  takes the network device semaphore, but so does the telnet logic causing
	  the deadlock.
	* arch/arm/src/stm32/stm32_pm*.c: Add basic STM32 power management logic
	  that will eventually be used to implement low power states.
	* arch/arm/src/stm32/stm32f*0xx_rcc.c:  In order to use CAN2, both CAN1 and
	  CAN2 clocking must be enabled.
	* arch/mips/src/pic32mx/picm32mx-usbdev.c:  Several stall-related fixes so that
	  the USB device driver can used the mass storage class (which does a LOT
	  of stalling as part of its normal protocol).  The PIC32 USB Mass Storage
	  device is, however, still non-functional when debug is OFF.
	* include/nuttx/fs: Move all file-system related files from include/nuttx to
	  include/nuttx/fs.
	* include/nuttx/serial: Move all serial-driver related files from include/nuttx to
	  include/nuttx/serial.
	* include/nuttx/clock.h and sched/clock_initialize.c:  Add a new OS interface
	  called clock_sychronize() that can be used to re-synchronize the NuttX
	  system time with a hardware RTC.  This function is called normally at power
	  up but may also need to be called when recovering from certain low-power
	  usage states where the system time is no longer accurate.
	* arch/arm/src/calypso and arch/arm/include/calypso: Support for the TI "Calypso"
	  phone processor. Contributed by Denis Carilki and includes the work of Denis,
	  Alan Carvalho de Assis, and Stefan Richter.
	* configs/compal_e88 and configs/compal_e99:  Support for Compal e88 and e99 phones
	  Contributed by Denis Carilki and includes the work of Denis, Alan Carvalho de
	  Assis, and Stefan Richter.
	* arch/arm/src/lpc17xx: Several fixes for error that have crept in for the LPC17xx
	  DAC.  Contributed by by Lzyy.
	* graphics/nxconsole:  Add a character driver that can be used as a console output
	  device for text output (still under development on initial check-in).
	* graphics/nxmu:  Fix several compilation errors that have crept into the multi-
	  user NX server because of lack of use.
	* graphics/nxconsole:  The NX text console is basically function (in multi-
	  user NX mode only).
	* arch/arm/src/stm32/stm32_i2c.c: Correct a bug in the STM32 I2C driver.  The
	  behavior of I2C status bits seems to be different between F1 and F4.
	* configs/stm3210e-eval/nxconsole:  New STM32 F1 configuration that runs the
	  NuttShell (NSH) within an NX window.
	* graphics/nxconsole/nxcon_sem.c:  Add protection from re-entrance with debug
	  is enabled.
	* include/nuttx/ascii.h and vt100.h:  Header files to centralize ASCII and
	  VT100 escape sequence definitions.
	* graphics/nxconsole/nxcon_vt100.c:  Add add framework to support VT100 escape
	  sequences in NxConsole.
	* fs/fs_read.c:  Fix read() return value for attempt to read from write-only
	  file or device.  Was returning EBADF, should return EACCES.
	* graphics/nxconsole.c:  NxConsole now supports backspace and a cursor.
	* Kconfig and arch/sim/Kconfig:  Beginnings of support for a NuttX
	  configuration tool.  Currently using the kconfig parser 'kconfig-frontend'
	  available at http://ymorin.is-a-geek.org/projects/kconfig-frontends
	  (version 3.3.0-1 is also available in the NuttX SVN at
	  trunk/misc/tools/kconfig-frontends-3.3.0-1.tar.gz).  Contributed by Lzyy.
	* */Kconfig:  Added skeleton Kconfig files to all directories that
	  may need them.
	* include/nuttx/math.h:  Moved include/math.h to include/nuttx/math.h
	  because it conflicts too often with the system math.h (and people aren't
	  inclined to read the documentation on how to handle this).  Now, if
	  CONFIG_ARCH_MATH_H=y is defined, the top-level makefile will copy
	  the redirecting math.h header file from include/nuttx/math.h to
	  include/math.h.  So for the architectures that define CONFIG_ARCH_MATH_H=y,
	  include/math.h will be in place as it was before; for the architectures
	  that don't select CONFIG_ARCH_MATH_H, the redirecting math.h header
	  file will stay out-of-the-way in include/nuttx/.
	* Kconfig, sched/Kconfig, lib/Kconfig, libxx/Kconfig, arch/sim/Kconfig,
	  drivers/Kconfig, drivers/mtd/Kconfig, drivers/input/Kconfig
	  drivers/analog/Kconfig, drivers/lcd/Kconfig:  Updated kernel
	  configuration support provided by Lzyy.
	* Kconfig:  Many more Kconfig updates (no longer tracking in the ChangeLog)
	* arch/arm/src/Makefile, arch/x86/src/Makefile, arch/avr/src/Makefile,
	  arch/mips/src/Makefile, arch/sim/src/Makefile, arch/hc/src/Makefile,
	  arch/sh/src/Makefile:  The libgcc.a in newer versions of GCC now
	  have an dependency on an external implementation of abort().  This
	  required modification to the Makefiles that do the final link:  Now
	  libgcc.a must be included within the group of libraries that are
	  search recursively.
	* arch/arm/srm/stm32/stm32_otgfsdev.c:  A USB OTG FS device-side driver
	  for the STM32 F4 (and maybe F2 and F1 connectivity line).
	* tools/cmpconfig.c:  A tool for comparing two configuration files.
	* include/nuttx/usb/usbdev.h, drivers/usbdev/*, arch/*/src/*/*usb*.c:
	  Extend the USB device side interface so that EP0 OUT data can be passed
	  with OUT SETUP requests.
	* include/nuttx/watchdog.h:  Add the definition of a standard watchdog
	  driver interface.
	* drivers/watchdog.c:  The "upper half" watchdog timer driver.

6.18 2012-05-19 Gregory Nutt <gnutt@nuttx.org>

	* Kconfig:  Continued Kconfig file updates (no longer tracking on a per-file
	  basis in the ChangeLog)
	* arch/arm/src/stm32/stm32_iwdog.c and stm32_wwdog.c:  Add the STM32 IWDG
	  and WWDIG watchdog timer driver.
	* configs/stm3240g-eval/src/up_lcd.c: Add LCD from for the STM3240G-EVAL (the
	  initial check-in is just a stm3210e-eval driver with renaming).
	* sched/sched_setscheduler.c:  Correct successful return value (Contributed
	  by Richard Cochran).
	* include/fcntl.h and lib/stdio:  Ignore CONFIG_STDIO_LINEBUFFER is the
	  file was opened in binary mode.
	* lib/stdio/lib_fopen.c:  Correct an error in parsing open mode string.  The
	  plus sign may not appear right after the basic mode.  For example, "r+", "rb+",
	  and "r+b" are all valid open strings and mean the same thing.
	* lib/stdio/lib_fopen.c:  Correct return errno value from f_open() and
	  f_fdopen() if the open mode string is invalid.
	* drivers/serial/serial.c:  Do not disable Rx interrupts on each byte.
	  Rather, only disable Rx interrupts when the Rx ring buffer may be empty.
	* include/nuttx/usb/audio.h:  USB Audio 1.0 definitions (in progress).
	* arch/arm/src/stm32/stm32fxx_dma.c:  STM32 F4 DMA now supports circular
	  buffer mode (contributed by Mike Smith)
	* arch/arm/src/stm32/stm32_serial.c:  The serial driver can now support
	  Rx DMA into a circular buffer (contributed by Mike Smith)
	* configs/pic32mx7mmb: Beginning of a configuration for the Mikroelektronka
	  PIC32MX7 Multimedia Board (MMB).
	* net/recvfrom.c:  Fix a compilation problem.  Some UDP logic was conditioned
	  on TCP, not UDP.
	* drivers/usbdev/cdcacm.c: Fix an infinite loop that occurs when the serial
	  device is unregisters.
	* arch/arm/src/stm32/stm32_otgfs.c: The driver needs to reset the software (in
	  order to flush the requests) and to disable the software connection when the
	  device is unregistered.
	* include/sys/prctl.h, sched/prctl.c, include/pthread.h:  Add interfaces to
	  support getting and setting of the thread or task name.
	* configs/ubw32:  Added a configuration to support the Sparkfun UBW32 PIC32 board.
	* configs/ubw32/nsh:  Added an NSH configuration for the Sparkfun UBW32 PIC32 board.
	* configs/ubw32/up_buttons.c:  Added button support for Bit Whacker board.
	* configs/stm3240g-eval/nxconsole:  Added a configuration to run the NSH
	  shell in an NX window for the STM3240G-EVAL board.
	* include/cxx/cunistd:  C++ header file to make sure that everything in
	  unistd.h is in the std:: namespace.
	* configs/sim/nxwm:  Added a configuration for testing the NuttX Window Manager
	  (NxWM)
	* fs/fs_fcntl.h:  On success, always returned OK.  However, some fcntl commands
	  require returning other values on success.
	* Various files.  Fix warnings about variables that were initialized by not used.
	* configs/sim/*/defconfig:  Changes to build a 32-bit simulation on a 32-bit
	  platform did not make into all of the Make.defs files.
	* graphics/nxmu/nx_move.c:  Wrong opcode was being used in the server message;
	  Also there was an error in the offset calculation.
	* graphics/nxglib/fb/nxglib_moverectangle.c:  Offset argument is really a
	  position, not an offset.
	* graphics/nxtk/nxtk_drawframe.c:  Framed windows are now drawn in three
	  colors (instead of just two).
	* drivers/input/stmpe811_*:  Added a driver to support the STMicro STMPE811
	  IO Expander and touchscreen driver.
	* configs/stm3240g-eval/nxwm:  Added to configuration for testing the NxWM
	  window manager on the STM3240G-EVAL board.
	* graphics/nxtk/nxtk_toolbarbounds.c:  Added an interface to get the toolbar
	  bounding box.
	* graphics/nxtk/nxtk_drawframe.c:  Fix an error in drawing the window frame.
	* NX, NxConsole:  Replace CONFIG_NXCONSOLE_NOGETRUN to CONFIG_LCD_GETRUN.  The
	  inability to read from the LCD is a property of the LCD, not of NxConsole.
	  Then add CONFIG_NX_WRITEONLY which is the more generic way of saying that
	  no NX component should try to read from the underlying graphic device (LCD
	  or other).
	* configs/stm3240g-eval/src/up_stmpe811.c:  Add board-specific support for the
	  the STMPE811 I/O expander on the STM3240G-EVAL board.  Verfied that the
	  STM3240G-EVAL touchscreen is now fully functional.
	* include/cxx/cfcntl:  Added std:: header file.
	* graphics/nxbe/nxbe_filltrapezoid.c and graphics/nxglib/fb/nxglib_filltrapezoid.c:
	  Fix several errors in the trapezoid fill logic.
	* include/nuttx/input/touchscreen.h, configs/hymini-stm32, configs/stm3240g-evel,
	* configs/sam3u-ek, configs/sim, arch/sim/src/up_touchscreen.c, and
	  apps/examples/touchscreen: Standardize the board-specific, touchscreen
	  initialization interfaces.
	* drivers/input/stmpe811_base.c and configs/stm3240g-eval:  The STMPE811-based
	  touchscreen seems to work better with edge (vs. level) interrupts
	* drivers/input/stmpe811_tsc.c:  Fix some status checks so that the touchscreen
	  interrupt handling logic does not read data if the fifo is not at the
	  threshold level.
	* include/nuttx/wqueue.h: Add macro work_available() to determine if the
	  previously scheduled work has completed.
	* drivers/stmpe811_tsc.c:  Correct errors: (1) Since all interrupt logic is done on
	  the worker thread, disabling interrupts does not provide protected; Need to
	  disable pre-emption.  (2) Fix handling of touch ID and (2) add some logic to
	  prevent certain kinds of data overrun.
	* include/nx/nxtk.h and graphics/nx/nxtk/nxtk.h:  Move setting
	  of configuration defaults from the internal header file to a place where
	  other logic can use the defaults.
	* graphics/nxtk/nxtk_events.c:  Fixed an important but in the logic that
	  translates the mouse/touchscreen position data for framed windows and toolbars.
	* drivers/input/stmpe811_tsc.c, tsc2007.c, and ads7843e.c:  Need to keep track of
	  when if positional data is valid.  When the touch is released, the X/Y position
	  of the release must be the same as the X/Y position of the last touch (se that
	  the release occurs in the same window as the last touch).
	* graphics/nxtk/nxtk_events.c:  Fix an error in mouse/touchscreen input logic:
	  Was autoraising the window AFTER processing the mouse press.  This raises havoc
	  if the result of processing the mouse click was to raise some other window!
	* graphics/nxtk/nxtk_events.c:  I had to disable the whole autoraise feature
	  for multi-user case because it does not work correctly.  In a scenario where (1) there
	  are multiple queued touchscreen events for the same window and (2) the result of the
	  first input was to switch windows, then the autoraise implementation will cause the
	  window to revert to the previous window.  Not good behavior.
	* sched/sched_mergepending.c:  Add task switching instrumentation.  There is a case
	  here where instrumentation was missing.  Contributed by Petri Tanskanen.
	* CONFIG_STMPE811_THRESHX, CONFIG_STMPE811_THRESHX, and drivers/stmpe811_tsc.c:  Add some
	  thresholding controls to all slow down processing of touchscreen samples.
	  This is a problem with NX in multi-user mode:  touchscreen data gets sent
	  via a message and when the message queue gets full the sender blocks and
	  touch events are lost.  Basic data overrun.  The badly effects touchscreen
	  human factors.
	* include/sched.h:  Fix a typo (missing semicolon) in prototype of on_exit();
	* sched/on_exit.c and include/nuttx/sched.h:  Fix some old typos that caused
	  compilation errors when CONFIG_SCHED_ONEXIT is defined.
	* configs/stm3240g-eval/nxwm/defconfig:  The default NxWM now uses the STMPE811
	  touchscreen.
	* include/cxx/csched: Added
	* graphic/nxmu/nxmu_sendserver.c, nxmu_sendwindow.c, and nxmu_sendclient.c:
	  Refactor NX messaging logic in preparation for a new message control
	  feature.
	* graphics/nxtk, graphics/nxmu, include/nuttx/nx:  Add a new window communication
	  to support blocking and flushing of client window messages.  If there are
	  stale, queue window messages at the time that a window is destroyed, very bad
	  things happen.

6.19 2012-06-15 Gregory Nutt <gnutt@nuttx.org>

	* graphics/nxconsole/nxcon_kbdin.c:  If selected, the NxConsole will take
	  input from the NX keyboard input callback.  If this option is set, then
	  the interface nxcon_kdbin() is enabled.  That interface may be driven by
	  window callback functions so that keyboard input *only* goes to the top
	  window. If CONFIG_NXCONSOLE_NXKBDIN is not selected, then the NxConsole
	  will receive its input from stdin (/dev/console).  This works great but
	  cannot be shared between different windows.  Chaos will ensue if you
	  try to support multiple NxConsole windows without CONFIG_NXCONSOLE_NXKBDIN
	* graphics/nxmu/nx_kbdin.c:  Fix pointer argument.  This is a error
	  introduced in changes leading up to the 6.18 release.  This error will
	  cause crashes or perhaps simply not work when you try to handle window
	  keyboard data in multi-user mode.
	* graphics/nxconsole/nxcon_kdbind.c:  Fixed unmatched sem_wait and sem_post.
	  Fix some conditional compilation that included a few too many lines of code.
	* drivers/input/stmpe811_tsc.c and stmpe811.h:  Add a timeout to catch missed
	  pen up events.  Now the STM3240G-EVAL touchscreen works very smoothly.
	* configs/stm3240g-eval/nxwm/defconfig: Enable support for NxConsole keyboard
	  input. Increasing spacing of icons.
	* configs/stm3240g-eval/nxwm/defconfig: Use a larger font for the calculator.
	* include/nuttx/lcd/ssd1289.h, drivers/lcd/ssd1289.c and .h:  Generic LCD
	  driver for LCDs based on the Solomon Systech SSD1289 LCD driver.  This
	  of this as a template for an LCD driver that will have to be cusomized
	  for your particular LCD hardware.
	* configs/stm32f4discovery/src/up_extmem.c and up_ssd1289.c:  Add support to
	  STM32F4Discovery for than an external, SSD1289-based LCD.
	* configs/stm32f4discovery/nxlines:  Add an STM32F4Discovery configuration
	  to thest the SSD1289-based LCD.
	* configs/stm3240g-eval/src: Add USB GPIO initialization logic needed
	  in board-specific boot logic.
	* configs/stm32f4discovery/src: Add USB GPIO initialization logic needed
	  in board-specific boot logic.
	* drivers/usbdev/pl2303.c and cdcacm.c:  Fix the request size used for sending
	  packets.  It was not using the maximum request size, but instead the previous
	  request size.  As a result, packets get smaller, and smaller, and ...  This
	  is an important USB serial fix.
	* arch/arc/src/stm32_otgfsdev.c: Bug fix: Don't process TXFE if we have
	  already processed an XFRC interrupt.  We have already done what needs
	  to done in that case.
	* arch/arc/src/stm32_otgfsdev.c:  Fixed some status settings in queuing of write
	  messages. Added a "hack" to work around missing TxFIFO empty interrupts.  The
	  hack is basically to poll for space in the TxFIFO instead of of setting up
	  the interrupt.
	* arch/arm/src/stm32/stm32f2* and chip/stm32f2*:  Update all STM32 F2 file so
	  that they are equivalent to F4 files.  This is kind of a maintenance nightmare.
	* configs/stm3220g-eval/: Update existing configurations to the same level
	  as the corresponding STM3240G-EVAL configurations.  This adds FSMC SRAM,
	  touchscreen, and LCD support.
	* configs/stm3220g-eval/: Add a NxWM configuration for the STM3220G-EVAL.
	* stmpe11*: Fix a massive naming problem.  All references to STMPE11 should be
	  STMPE812.
	* arch/arm/src/stm32/stm32_otgfsdev.c: Need to enabled USB reset interrupt
	  (contributed by Erik Van Der Zalm).
	* sched/sleep.c:  Fix the return value from sleep().  The correct behavior is
	  to return the number of unwaited seconds; the implementation was always
	  returning zero.
	* sched/usleep.c and include/unistd.h:  Was a void function, but should return
	  0 on success.  usleep() needs to check the return value from sigtimedwait().
	  sigtimewait() returns the signal number that awakened it and an error (EAGAIN)
	  if the timeout expired (normal case).
	* sched/sig_timedwait.c:  Fix sigtimedwait() return value.  On a timeout, it was
	  setting the 8-bit si_signo field to -1 and eded up reported successfully awakened
	  by signal 255!  Now detects the timeout and errors -1 with errno == EGAIN.  If
	  sigtimedwait() is awakened by an unblocked signal, but it is not one of the
	  signals in the waited-for set, it will return -1 with errno == EINTR.
	* arch/arm/src/stm32_i2c.c:  Fix STM32 F2 I2C.  It is apparently bug-for-bug
	  compatible with the F4 and needs the same work-around for the missing BTF
	  signal that was needed for the F4.
	* drivers/lcd/ssd1289.*:  Fix some of the initial register settings.
	* configs/stm32f4discovery/src/up_ssd1289.c: FSMC address bit 16 is used to
	  distinguish command and data.  But FSMC address bits 0-24 correspond to ARM
	  address bits 1-25, se we need to set bit 17 in order generate output on
	  FSMC_A16.
	* arch/arm/src/lm3s/lm3s_epi.h and lm3s_timer.h:  LM3S header files
	  (contributed by Max Neklyudov).
	* arch/arm/src/stm32/stm32_irq.c:  Some of the interrupt priorities were
	  not be initialized (F2 and F4 only).  Thus, the very high numbered
	  interrupts (like UART6) and cause nested interrupts.  This leads to
	  some very difficult to debug crashes.  Fix contributed by Mike Smith.
	* arch/mips/src/pic32/pic32_head.S and pic32_config.h and
	  configs/pic32mx7mmb/include/board.h:  Extended PIC32 device configuration
	  capabilities and change board.h to support unique clocking requirements
	  of the Mikroelektronika PIC32MX7 MMB.  That board now works!
	* configs/pic32mx7mmb/nsh:  Added and verify a NuttShell configuration
	  for the Mikroelektronika PIC32MX7 MMB board.
	* arch/mips/pic32/pic32mx-ethernet.c:  Fix logic that guesses PHY address;
	  the search loop missed the PHY address needed by the Mikroelektronika
	  PIC32MX7 MMB board.
	* configs/pic32mx7mmb/nsh:  Configuration now supports a network by default.
	* configs/pic32mx7mmb/src:  Add support for the MMC/SD slot on board
	  the Mikroelektronika PIC32MX7 MMB board (not working on initial check-in).
	* arch/mips/src/pic32/pic32mx-spi.c:  Add support for very low-level,
	  register access debug output.
	* configs//pic32mx7mmb/include/board.h:  Reduced peripheral clock to
	  4MHz to match other PIC32 configurations.
	* configs/pic32mx7mmb/src/up_nsh.c:  SD card needs to operate in SPI
	  mode 2.
	* configs/pic32mx7mmb/nsh/defconfig:  MMC/SD card support is now
	  enabled by default in the PIC32MX7 MMB board configuration.
	* configs/pic32mx7mmb/nsh/defconfig:  Verified the USB Mass Storage
	  Class (MSC) using MMC/SD card as the logical unit.  Updated the default
	  PIC32MX7 MMB board configuration so that USB and the mass storage class
	  are enabled by default.
	* drivers/lcd/mio283qt2.c and include/nuttx/lcd/mio283qt2.h:  Add generic
	  support for the MIO283QT2 LCD.
	* configs/pic32mx7mmb/src/up_mio283qt2.c:  Add support for the MIO283QT2
	  LCD on the PIC32MX7 MMB board.
	* configs/pic32mx7mmb/src/up_touchscreen.c:  Add an ADC-based touchscreen
	  driver for the PIC32MX7 MMB board.  Kind of works, but needs more
	  verification and tuning.
	* arch/mips/src/common/up_idle.c:  Strange but important fix.  For some still-
	  unknown reason, interrupts are left in an unhealthy state in the IDLE
	  when the work queue is enabled.  This is partially because some interrupt
	  related logic is not built in that case.  Simply disabling then re-
	  enabling interrupts restores the proper state.
	* graphics/nxglib/lcd/nxglib_filltrapezoid.c and fb/nxglib_filltrapezoid.c:
	  Fix an error when the trapezoid is only 1 line high.  In this case, a
	  divide by zero error would occur.  The fix is to draw the 1 line high
	  trapezoid as a run.
	* drivers/usbdev/pl2303.c:  Fix a cut'n'paste error that snuck into
	  the PL2303 emulation driver several months back.

6.20 2012-07-12 Gregory Nutt <gnutt@nuttx.org>

	* configs/stm3210e-eval/src and arch/arm/src/stm32/: Add beginnings of
	  power management support for the STM32 and the STM3210E-EVAL board, in
	  particular.
	* Documentation/NfsHowTo.html:  Add a How-To document for the new NFS
	  client feature.
	* arch/mips/include/pic32mx and arch/mips/src/pic32mx:  Add support for the
	  PIC32MX1 and PIC32MX2 families.
	* configs/mirtoo:  Add a board configuration to support the DTX1-4000L
	  "Mirtoo" module from http://www.dimitech.com/
	* tools/pic32mx:  All of the duplicate directories containing the same
	  same PIC32 tools were move to this single location.
	* configs/mirtoo:  The basic Mirtoo port is now functional.
	* configs/mirtoo/ostest:  Added support for the microchipOpen toolchain
	  (see http://sourceforge.net/projects/microchipopen/).
	* configs/mirtoo/nsh:  Added a NuttShell (NSH) configuration for
	  the Mirtoo module.
	* configs/mirtoo/scripts:  Move all Mirtoo linker scripts to a common
	  directory.
	* arch/mips/src/pic32mx/pic32mx-gpio.c:  All digital inputs were being
	  configured as outputs.  This is a *critical* bug fix and needs to be
	  incorporated by any PIC32 users.
	* drivers/mtd/sst25.c:  Added a driver for the SST 25 SPI-based FLASH
	  parts.
	* configs/mirtoo/src/up_nsh.c:  The Mirtoo NSH configuration can now
	  mount the SST 25 devices so that it can be used for a FAT file system.
	  There are are, however, some NSH memory usage issues if this configuration
	  enabled now.  Some tuning is still needed.
	* configs/mirtoo/nxffs:  Add an alternative NSH configure for the Mirtoo
	  module for testing the on-module SST 25 chip using the NXFFS file system.
	* arch/arm/src/lpc43xx and arch/arm/include/lpc43xx:  The NXP LPC43xx port
	  is slowly evolving in these directories.
	* configs/stm3210e-eval/pm:  Add a new configuration for testing STM32 power
	  management.
	* configs/stm3210e-eval/scripts:  Moved all of the duplicate ST3210-EVAL
	  linker scripts into one set of linker scripts at this location.
	* configs/stm3210e-eval/src/up_buttons.c, up_lcd.c, and up_pm.c:  New logic
	  for testing STM32 power management.
	* configs/lincoln60:  Add a configuration to support the Micromint Lincoln60
	  board.
	* configs/ekk-lm3s3b96:  Add a configuration to support the TI/Stellaris
	  EKK-LM3S3B96 development board.  Contributed by Jose Pablo Rojas V.
	* arch/arm/src/lpc43xx/chip:  Created header files for *all* (really)
	  lpc43xx registers and all bit-fields.
	* configs/lpc4330-xplorer:  Added a configuration for the NXP LPC43XX
	  Xplorer board.  This is just to facilitate testing of the LPC43xx
	  port but will, with any luck, become proper board support for that
	  board.
	* arch/arm/src/lm3s/lm3s_syscontrol.c:  Fix an optimization related problem
	  by adding a volatile qualifier to a timing loop.  Oddly, the consequence
	  of the bug is that when debug was off, the LM3S platform too a long time
	  to boot.  It now boots rapidly whether debug is on or off.
	* arch/*/include/limits.h:  Change all values in all limits.h for all
	  architectures to signed decimal; the hex values were not sign extending
	  appropriate in most uses (reported by Lorenz Meier).
	* arch/arm/src/stm32/chip/stm32f103/7vc_pinmap:  Fix typographical error in
	  two pinmap definition files.
	* lib/net/lib_inetntoa.c:  Fix typographical error that cause compilation
	  failure on platforms that do not support passing of structures as
	  parameters.
	* arch/arm/*/lpc43xx and configs/lpc4330-xplorer and code complete and
	  ready for testing.  Hopefully, verified LPC43xx support will appear
	  in NuttX-6.20.
	* include/nuttx/stdarg.h:  If CONFIG_ARCH_STDARG_H=y is defined, the top-level
	  makefile will copy the generic (GCC-only) stdarg.h header file from
	  include/nuttx/stdarg.h to include/stdarg.h.  So for the architectures
	  that cannot use their GCC toolchain's stdarg.h file, they can use this
	  alternative by defining CONFIG_ARCH_STDARG_H=y.  If CONFIG_ARCH_STDARG_H,
	  is not defined, then the redirecting stdarg.h header file will stay
	  out-of-the-way in include/nuttx/.
	* configs/lpc4330-xplorer/nsh:  Add an NSH configuration for the LPC4330
	  Xplorer board.

6.21 2012-08-25 Gregory Nutt <gnutt@nuttx.org>

	* configs/lpc4330-xplorer/up_nsh.c:  Add support for a basic SPIFI block
	  driver for use by NSH.  Does not work!  Crashes on first SPIFI write.
	* configs/lpc4330-xplorer/*/defconfig: Calibrate delay loops (this is
	  based on the current "slow" 72MHz M4 clock and will need to be
	  re-calibrated when this is increased).
	* configs/stm3220g-eval/include/board.h and configs/stm3240g-eval/include/board.h:
	  The SDIOCLK frequency in the F2 and F4 derives for PLL48CLK and not HCLK
	  so that the SDIOCLK input frequency should always be 48MHz.
	* sched/os_internal.h, sched_setupidlefiles.c, sched_setuptaskfiles.c, and
	  sched_setupidlefiles.c:  Detangle some conditional compilation.  Allow for
	  a perverse configuration that has socket descriptors and streams but no file
	  descriptors (sure, why not?).
	* sched/: Stylistic clean-up of all files.  Some of these files are pretty old
	  and do not follow current NuttX coding standards in detail.
	* fs/: More stylistic file clean-up.
	* mm/: More stylistic file clean-up.
	* drivers/ and drivers/serial/: More stylistic file clean-up.
	* arch/arm/src/lpc43xx/lpc43_clockconfig.c:  Fix PLL1 bit manipulation logic.
	  Critical bugfix! This would often cause the LPC43xx to fail to boot.
	* arch/arm/src/lpc43xx/lpc43_rgu.c:  The soft reset logic called from the
	  beginning of __start seems cause problems.  A magic delay seems to improve
	  the logic some.  But I suspect that real fix is to get rid of all of the
	  soft reset logic.  This would also be a critical bugfix if I believed
	  that it really fixed all of the issues.
	* arch/arm/src/lpc43xx/chip/lpc43_cgu.h:  Fix a bit mask in the PLL1
	  control register.  Critical bugfix.
	* arch/arm/src/lpc43xx/lpc43_clockconfig.c and configs/lpc4330-xplorer/include/board.h:
	  Implement PLL1 ramp-up logic; Now the LPC43xx is running at 204MHz.
	* configs/lpc4330-xplorer/*/defconfig:  Re-calibrated delay loops using
	  the 204MHz clock.  The LPC43xx ripping rips!  This calibration was performed
	  with symbols enabled and all optimization disabled.  It will need to be
	  better recalibrated again down the road.
	* arch/arm/src/stm32/stm32_exti.c:  Renamed to rch/arm/src/stm32/stm32_exti_gpio.c
	  to make a little room in the file name space.
	* arch/arm/src/stm32/stm32_exti_alarm.c:  Add initial logic to attached the
	  RTC alarm EXTI interrupt.  This is work be performed mostly by Diego Sanchez.
	* include/: More stylistic file clean-up.
	* arch/arm/src/lpc43xx/lpc43_spifi.c, lpc43_spifi.h, and chip/lpc43_spifi.h:  Add
	  logic to configure and initialize the SPIFI device (does not yet work).
	* configs/lpc4330-xplorer/include/board.h:  Reduce SPI SCLK value.
	* arch/arm/src/lpc43xx/lpc43_spifi.c, lpc43_spifi.h, and chip/lpc43_spifi.h:
	  Logic completely redesigned.  It now creates an MTD driver to access SPIFI...
	  but the driver still does not work.
	* arch/arm/src/stm32 and arch/arm/include/stm32: Make name of RTC ALARM interrupt
	  common on STM32 F1,2,4
	* arch/arm/src/stm32 and arch/arm/include/stm32: Add support for the
	  STM32F100x "Value Line" devices. This includes changes to stm32F10xx_rcc.c that
	  add the ability to run the chip off the internal oscillator.  There is no open
	  board configuration for this part yet (the STM32VLDiscovery would be a candidate).
	  Contributed by Mike Smith.
	* arch/arm/src/stm32: Fixed typos in conditional compilation in the CAN and DMA
	  and some pin configuration.  This would have caused problems for STM32 F107xx.
	  Typos noted by Mike Smith.
	* arch/arm/src/lpc43xx/lpc43_serial.c:  Add support for certain RS-485 features
	* lib/termios/lib_cfsetispeed.c, lib_cfsetospeed.c, lib_tcflush.c:  Add
	  simple implementations of cfsetispeed(), cfsetospeed(), and tcflush().
	* include/sys/str_tty.h, lib/lib_setspeed.c, lib_getspeed.c, and lib_resetspeed.c:
	  Add APIs to support setting non-standard BAUD values not supported by POSIX
	  termios.  These are non-standard interfaces but have a precedence:  There are
	  similar interfaces in AIX.
	* include/sys/str_tty.h, lib/lib_setspeed.c, lib_getspeed.c, and lib_resetspeed.c:
	  Sigh... removed.  We don't need any more almost standard interfaces!  (SVN
	  revision 4968 if you want the short-lived code).
	* include/termios.h and lib/termios/*:  Open the existing, standard termios
	  interfaces to permit some non-standard baud settings.  The new termios definitions
	  still supports the POSIX standard except that it does not strictly enforce
	  baud rate settings, permitting some non-portable, but useful baud rate settings
	  (this is what the short-lived AIX-like interfaces would have accomplished as well).
	* include/termios.h and lib/termios/*:  Redesigned yet again (this is getting
	  painful.  NuttX now supports the BOTHER baud setting just as Linux does.  termios
	  Bxxx definitions are again encoded; cf[set|get][o|i]speed now deal with only the
	  encoded values.  If the encoded baud is set to BOTHER, then the values in the (non-
	  standard) c_ispeed and c_ospeed baud values may be accessed directly.
	* arch/arm/src/stm32/stm32_serial.c:  Add minimal termios support for the STM32
	  (BOTHER style baud settings only).  Contributed by Mike Smith.
	* configs/lpc4343-xplorer/src:  Clean up SPIFI-library based build to that it
	  actually works.
	* arch/arm/src/lpc43xx/lpc43_spifi.c:  Add support for verification to writes.
	  Add debug option to dump buffers.  Several bugfixes... almost works.
	* include/termios.h, lib/termios/*, and arch/arm/src/stm32/stm32_serial.c: :
	  BOTHER is gone again.
	* arch/arm/src/stm32/stm32_sdio.c and chip/stm32f20xx_pinmap.h:  STM32 F2 SDIO
	  fixes from Gary Teravskis and Scott Rondestvedt.
	* include/termios.h and lib/termios/*:  Replace cfsetispeed and cfsetospeed with
	  cfsetspeed (with definitions for the input/outputs in termios.h).
	* configs/stm32f4discovery/src and configs/stm32f4discovery/pm:  Add a power
	  management configuration for the STM32F4Discovery and supporting logic.  This
	  check-in also includes some fixes for the F4 RTC alarm logic.
	* drivers/input/pga11x.c and include/nuttx/input/pga11x.h:  Add support for the
	  TI PGA112/3/6/7 amplifier/multiplexer parts.
	* configs/mirtoo/README.txt, nsh/defconfig, and nxffs/defconfig:  Add support
	  for the PGA117 on the Mirtoo module.
	* drivers/analog/pga11x.c and include/nuttx/analog/pga11x.h:  These belong in
	  the analog subdirectories, not input.
	* configs/compal_e99/src/ssd1783.c and /ssd1783.h:  Drivers for the SSD1783
	  LCD found in the Motorola C155 telephone.  The driver is specific to the C155
	  because it uses the uwire transport.  Contributed by Denis Carilki and
	  Alan Carvalho de Assis.
	* drivers/power/pm_changestate.c.  Correct a case where interrupts were not
	  being re-enabled.  Found by Diego Sanchez.
	* configs/mirtoo/nxffs/defconfig:  This Mirtoo NXFFS configuration now uses the
	  open Pinguino toolchain by default.  This is necessary because the free C32
	  toolchain does not support any optimization and the unoptimized NXFFS image
	  hits the PIC32MX2 FLASH size (128K).  There is plenty of room to grow using
	  the Pinguino toolchain with -O2 optimization.
	* configs/mirtoo/src/up_adc.c.  This is just a stub for now, but this is
	  where Mirtoo ADC logic will eventually need to go.
	* arch/mips/src/pic32mx/pic32mx-gpio.c:  Now supports the PIC32MX1/2 ANSEL
	  IOPORT register.
	* lib/string/lib_memchr.c:  Add support for memchr() (contributed by Mike Smith)
	* lib/string/lib_memccpy.c:  Add support for memccpy()
	* arch/arm/src/lpc17xx/lpc17_serial.c:  Now supports ioctl commands to change
	  the baud using tcsetattr() (contributed by Chris Taglia).
	* arch/*/src/*_serial.c: Fix ioctl method return values.  These methods
	  should return a negated errno value; they should not set the errno
	  variable.
	* sched/on_exit.c, sched/task_exithook.c, and include/nuttx/sched.c:  Add
	  support for multiple registered on_exit() functions if CONFIG_SCHED_ONEXIT_MAX
	  is defined.
	* drivers/syslog/ramlog.c: Move the RAM SYSLOG device into drivers/syslog
	  so that it will be in the same directory as some new SYSLOGing devices
	  in the works.
	* include/nuttx/syslog.h and drivers/syslog/ramlog.c:  The SYSLOG putc function
	  now has a common name that is independent of the device that provides the
	  SYSLOG.
	* include/nuttx/syslog.h and drivers/syslog/syslog.c:  This is a new, generic
	  SYSLOG device that can redirect debug output to any character device or file.
	  So you can log debug output to a file or you can put the console on /dev/ttyS0
	  and the debug output on /dev/ttyS1.
	* arch/arm/src/lpc43xxl/lpc43_spifi.c: Correct an addressing error in the LPC43
	  SPIFI MTD driver
	* drivers/syslog/syslog.c and fs/fs_syslog.c:  Moved the generic syslog logic
	  from drivers/syslog to fs/ where is belongs.  Especially after realizing that
	  the syslog logic is going to have to some internal FS operations in order
	  to realize a totally thread-independent SYSLOG interface.
	* arch/arm/src/stm32/stm32*_rcc.c and .h:  If CONFIG_PM is defined, add a
	  function called stm32_clockenable() that can be used by PM logic to re-start
	  the PLL after re-awakening from deep sleep modes.
	* fs/fs_foreachinode.c and fs/fs_foreachmountpoint.c:  Add logic to traverse
	  inodes and mountpoints in the NuttX pseudo-file system.
	* fs/fat/fs_fat32.c: Max. filename length reported by statfs() was wrong
	  if FAT long file names were enabled.
	* lib/stdio/lib_libvsprintf.c:  Fieldwidth and justification were not
	  supported for the %s format.  As a result, %s, %12s, and %-12s all
	  produced the same output.
	* lib/stdio/lib_libdtoa.c:  Fix several issues with presenting floating
	  point numbers (conversions are fine, but presentation was bad).  This
	  is a critical bug fix if you use printf or sprintf to deal with floating
	  point numbers.
	* lib/stdio/lib_libdtoa.c and lib_libvsprintf.c:  Correct some floating
	  point options.
	* arch/arm/lpc43xx/lpc43_usb0dev.c:  Add framework for development of
	  an USB0, device-side driver for the LPC43XX.  The initial check-in,
	  however, is simply for the LPC31xx driver with name changes.  The
	  LPC31xx has the same USB IP, but will require some additional initialization
	  (and lots of testing) before it can be used with the LPC43xx.
	* nuttx/Documentation/NuttShell.html:  Added a section covering ways to
	  customize the behavior of NSH.
	* arch/arm/src/stm32/chip/stm32f1*_pinmap.h: STM32 CAN TX/RX pins reversed;
	  inconsistent conditional compilation.  Reported by Max Holtzberg.
	* arch/arm/*/stm32:  Add support for STM32 F107 "Connectivity Line"
	  Ethernet (contributed by Max Holtzberg).
	* configs/olimex-stm32-p107:  Add board support for the Olimiex STM32-P107
	   board (contributed by Max Holtzberg).
	* arch/arm/src/stm32/stm32f2xx_dma.c, stm32f4xx_dma.c, stm32_serial.c, and
	  stm32_spic.c:  DMA priority was getting zeroed by STM32 F2/F4 DMA drivers
	  so that all DMAs ran at the lowest priority.
	* configs/stm3240g-eval/include/board.h and configs/stm3220:  Drop SD card
	  frequency from 24 to 16 MHz.  Apparently 24 MHz is too fast for the board.
	  This (plus the change to the STM32 DMA (above) fixes SDIO DMA on the
	  STM3240G-EVAL (and probably STM3220G-EVAL -- untested).
	* arch/arm/src/stm32/stm32f2xx_dma.c and stm32f4xx_dma.c: Backed out the
	  DMA priority change just above.  The reduced SD card frequency was
	  necessary and sufficient to resolve the problem.
	* drivers/serial/serial.c:  open, read, write, and poll methods may now
	  abort return EINTR (or a short transfer size) if a signal is received
	  while waiting to receive or send serial data.  This behavior is required
	  by POSIX.
	* include/sys/types.h:  Define NULL to be (0) if __cplusplus is defined.
	  (contributed by Mike Smith)
	* include/ctype.h: Remove a stray semi-colon in a definitions (Thanks
	  Mike Smith).
	* configs/.../Make.defs.  Fix C++ include path set-up in Make.defs file
	  for all 8-bit AVR platforms (Thanks Richard Cochran).
	* lib/stdio/lib_*stream.c:  Revised to handle new error return values from
	  serial.c.
	* arch/arm/src/stm32/stm32_spi.c:  SPI driver can now service re-
	  initialization (Mike Smith).
	* tools/mkconfig.c:  If CONFIG_DRAM_END is not specified, this tool
	  will provide default definition of (CONFIG_DRAM_START + CONFIG_DRAM_SIZE)
	* arch/arm/src/stm32/stm32_otgfshost.c:  Renamed from stm32_usbhost.c.
	  This is nearly code complete and, with any luck, will be available
	  in NuttX-6.21.
	* configs/*/defconfig:  Update all defconfig files to remove syntax
	  that is incompatible with the mconf configuration tool.
	* arch/arm/src/stm32/stm32_otgfshost.c:  This driver now appears to be
	  functional (although more testing is necessary).

6.22 2012-09-29 Gregory Nutt <gnutt@nuttx.org>

	* include/semaphore.h, sched/sem_holders.c, and lib/semaphore/sem_init.c:
	  Fix some strange (and probably wrong) list handling when
	  CONFIG_PRIORITY_INHERITANCE and CONFIG_SEM_PREALLOCHOLDERS are defined.
	  This list handling was probably causing errors reported by Mike Smith
	* sched/sched_waitpid.c: Fix a possible issue with logic logic that
	  should be brought into a critical section (suggested by Mike Smith)
	* sched/sched_setuptaskfiles.c: Should be 'struct socket' not
	  'struct sockets'.  How did this compile before? (found by Kate)
	* syscall/syscall.csv:  Fix prototype for usleep() and prctl() (also
	  from Kate).
	* arch/arm/src/lpc17xx/lpc17_ethernet.c:  Conditionally elide setting PHY
	  speed/duplex.  This does not work for certain PHYs.  Still some unresolved
	  issues (also from Kate).
	* tools/Config.mk, Makefile, configs/*/Make.defs:  Add a new Makefile
	  fragment to de-quote certain strings from the Kconfig logic that
	  need to be used at path segments (Richard Cochran).
	* arch/arm/src/stm32/stm32_usbotghost.c:  The STM32 USB host driver only
	  works with debug turned on.  The problem appears to be that with debug
	  OFF, there are more NAKs occuring in more places than before and this
	  reveals a variety of errors.  This check in improves NAK robustness
	  for control transfers but does not resolve all of the issues.
	* configs/stm3220g-eval/*/defconfig:  Calibrated delay loop.  It had
	  never been calibrated was way off.
	* sched/sem_holder.c: Add logic to handler some priority inheritance
	  cases when sem_post() is called from an interrupt handler.  The
	  logic is clearly wrong, but it is not known if this is the
	  cause of any known bugs.
	* lib/stdio/lib_perror():  Add perror().  Contributed by Kate.
	* lib/string/lib_strerror():  Add option CONFIG_LIBC_STRERROR that
	  is now required to enabled strerror().  Add an option
	  CONFIG_LIBC_STRERROR_SHORT that can be used to output shortened
	  strings by strerror().
	* arch/arm/src/stm32/stm32_usbotghost.c:  Finally... the USB OTG FS
	  appears to handle NAKing correctly.
	* configs/stm32f4discovery/*:  Added and verifed support for USB OTG FS
	  host on the STM32F4Discovery board.
	* configs/*/defconfig: Remove configuration documentation from config
	  files.  It is redundant, error-prone, and difficult to maintain.
	  Configuration documentation is available in configs/README.txt for
	  common configurations and in configs/*/README.txt for board and MCU-
	  specific configurations.
	* configs/stm3240g-eval: Add USB host support.
	* sched/os_bring.c, configs/*/defconfig, tools/mkconfig.c, and others:  Added
	  configuration variable CONFIG_USER_ENTRYPOINT that may be used to change
	  the default entry from user_start to some other symbol.  Contributed by
	  Kate. NOTE: This change does introduce a minor backward incompatibility.
	  For example, if your application uses NSH as its start-up program, then your
	  build will now fail because it will be unable to find "user_start".  The fix
	  for this link failure is to add the following to your configuration file:
	  CONFIG_USER_ENTRYPOINT="nsh_main".
	* libs/stdio/lib_libfread.c and lib_*flush*.c:  Correct a couple of
	  error cases where the lib semaphore was not be released on error
	  exits (thanks Ronen Vainish).  Also, improved some error reporting:
	  the generic ERROR was being used instead of the specific errno
	  value; the errno variable was not always set correctly.
	* tools/mkfsdata.pl: The uIP web server CGI image making perl script was
	  moved from apps/netutils/webserver/makefsdata to nuttx/tools/mkfsdata.pl
	  (Part of a larger change submitted by Max Holtzberg).
	* configs/stm3240g-eval/script/ld.script:  All of the identical ld.script
	  files for the STM3240G-EVAL were replaced by one version in this directory.
	* configs/stm3240g-eval/webserver:  Configuration submitted by Max Holtzberg
	  for testing the changes to the uIP web server (see apps/ChangeLog.txt).
	* lib/stdio/lib_perror.c:  Remove CONFIG_LIBC_PERROR_DEVNAME.  What was I
	  thinking?  Arbitrary streams cannot be shared by different tasks.
	* tools/mksyscall.c, csvparser.c, and csvparser.h: Separate CSV parsing
	  logic from mksyscall.c into files where it can be shared.
	* tools/mksymtab.c:  Add a tool that can be used to convert a CSV file
	  into a NuttX-style symbol table.
	* sched/work_cancel.c:  Fix a bad assertion (reported by Mike Smith)
	* configs/stm3210e-eval/src/up_idle.c:  Correct some power management
	  compilation errors (reported by Diego Sanchez).
	* include/nuttx/wqueue.h, sched/work*, and others:  Added logic to support
	  a second, lower priority work queue (CONFIG_SCHED_LPWORK).
	* arch/arm/src/stm32/stm32_dma.c, chip/stm32*_memorymap.h:  FSMC SRAM is
	  only 16-bits wide and the SDIO DMA must be set up differently.
	* arch/arm/src/stm32/stm32_dma.c:  Back out the 16-bit DMA change. It
	  is incorrect.
	* configs/:  Make use of UART4/5 vs USART4/5 consistent in all places.
	* Kconfig: Serial 2STOP setting must be integer 0/1, not a boolean.
	* lib/misc/sendfile.c and include/sys/sendfile.h:  Add a Linux style
	  sendfile() (non-standard!)
	* Kconfig: Refactor serial settings (moved from chip to drivers/serial).
	  AVR "teensy" now builds with Kconfig (contributed by Richard Cochran).
	* Kconfig: Add configuration settings for the LPC17xx
	* Kconfig: Add configuration settings for the LM3S (from Richard Cochran).
	* Kconfig: Verify configuration settings for the STM32.  This includes
	  changes in the way that the external SRAM is configured:  Define
	  CONFIG_HEAP2_SIZE (decimal) instead of CONFIG_HEAP2_END (hex).
	* tools/configure.sh:  Don't append the apps directory path setting
	  if the correct setting is already in defined in the defconfig file.
	* fs/fat/fs_utils.c:  Improperly constructed bool expression.  This
	  would cause many unnecessary writes to FLASH (Thanks Ronen Vainish).
	* Kconfig: Verify configuration settings for the LPC43xx.  This includes
	  some corrections to configuration variable names and defconfig settings.
	* Kconfig: Add and verify configuration settings for the LPC31xx.
	* arch/arm/src/stm32/stm32_uart.h and stm32_serial.c:  Add logic to
	  re-initialize the console UART as needed to enable DMA on the
	  console UART (contributed by Mike Smith).
	* net/recvfrom.c, net/Kconfig, include/nuttx/net/uipopt.h: Remove delay
	  after receiving data.  That has historical reasons to be there (it
	  was needed before read-ahead buffering was added), but kills performance.
	  (Noted by Max Holtzberg).
	* configs/shenzhou:  Add beginnings of a board configuration for the
	  Shenzhou STM32107 board (see www.armjishu.com).  Very little is in
	  place as of this initial check-in.
	* QEMU: Fixes from Richard Cochran to build QEMU with Kconfig files.
	* arch/*/src/Makefile:  Remove some old logic that was kicked off
	  when CONFIG_BOOT_RUNFROMFLASH=y.  The old logic used to use
	  objcopy to move sections.  Newer logic changes the load position
	  of sections in the linker script.  As far as I can tell, there
	  is nothing in the source tree now that depends on the old way of
	  doing things (if I am wrong, they will need a change to the linker
	  script).
	* configs/fire-stm32v2:  Configuration for the M3 Wildfire board.  I
	  don't know very much about this board other than is has an
	  STM32F103VET6 chip, LCD, touchscreen, and ENC28J60 network.  Very
	  little is in place on the initial check-in.
	* configs/shenzhou: Coding for the Shenzhou board port is complete,
	  but tested has been deferred until I get the right tools.
	* arch/arc/include/stm32/chip.h and arch/arm/src/stm32/chip.h:
	  Add support for the STM32F103VET6.
	* fs/fs_fdopen.c: Bad check for failure to allocate memory.  (Noted
	  by Ronen Vainish).
	* drivers/mmcsd/mmcsd_sdio.c: If the MMC/SD driver were ever
	  uninitialized then there would be a double release of memory
	  (Noted by Ronen Vainish).
	* fs/mmap/fs_rammap.c:  Fix logic error and errno check (contributed
	  by Kate).
	* arch/avr/src: Fixes from AVR32 build errors that have crept in
	  over the time; incorporated Kconfig for AVR3 (Richard Cochran).
	* fs/fat and include/nuttx/fs/fat.h: The FAT file system allocates
	  memory for sector I/O buffers used to exchange data with the
	  configured block driver.  In some contexts, the block driver may
	  require DMA-capable memory.  If CONFIG_FAT_DMAMEMORY is defined,
	  then the FAT FS will use platform-provided DMA memory allocators
	  to allocate the block driver I/O buffers.
	* CONFIG_NET_ENC28J60 renamed CONFIG_ENC28J60 to be consistent
	  in all places.
	* drivers/enc28j60.c, include/nuttx/net/enc28j60.h, and
	  olimex-strp711/src/up_enc28j60.c:  No longer passes IRQ number
	  as a parameter.  Instead now passes a call table to manage
	  ENC28J60 GPIO interrupts.  That is because GPIO interrupts are
	  handled in different ways by different MCUs and some do not
	  support IRQ numbers for GPIO interrupts.
	* mm/mm_gran* and include/nuttx/gran.h:  Add a simple granule-
	  based allocator.  The intent of this allocator is to support
	  simple allocation of DMA I/O buffers.  The initial check-in
	  is code complete but untested (not event built into the
	  mm/Makefile yet.
	* configs/fire-stm32v2: The board port is basically functional.
	  Not all features have been verified.  The ENC28J60 network
	  is not yet functional.
	* configs/stm3240g-eval/discover:  A configuration for testing
	  the UDP discovery utility.  Contributed by Max Holtzberg.
	* mm/README.txt:  Add a new README file.
	* include/nuttx/usb/usb.h, arch/*/src/*usb.c, and arch/*/src/*otg*.c:
	  Add hooks to to use common, external DMA buffer allocation
	  implementation.
	* net/recvfrom.c: Don't block in recvfrom if (1) read-ahead buffering
	  is enabled and (2) some data was obtained from read-ahead buffers.
	  Blocking is a bad idea in that case because there is no timeout!
	  (submitted by Max Holtzberg).
	* configs/stm3240g-eval/xmlrpc: An example configuration for the
	  Embeddable Lightweight XML-RPC Server at apps/examples/xmlrpc.
	  See http://www.drdobbs.com/web-development/
	  an-embeddable-lightweight-xml-rpc-server/184405364 for more info.
	  Contributed by Max Holtzberg.
	* configs/*/nxwm/defconfig and sched/task_exithook.c: Fixes for
	  bugs that crept in during recent changes.  (Submitted by Max
	  Holtzberg).
	* arch/arm/include/armv7-m/irq.h:  Fix a critical bug in irqsave().
	  It looks like sometimes the compile will re-order some instructions
	  inapproapriately.  This end result is that interrupts will get
	  stuck off.
	* drivers/mtd/w25.c:  Beginning of a driver for the Windbond SPI
	  FLASH family (W25x16, W25x32, and W25x64).  The initial check-in
	  is basically just the SST25 driver with some name changes.
	* arch/arm/include/armv7-m/irq.h and arch/arm/src/stm32/stm32_spi.c:
	  Back out the last change in irq.h.  It is (most likely) fine the
	  way it was.  The really interrupt related problem was in stm32_spi.c:
	  When SPI3 is not enabled, then the irqrestore() falls in the
	  else clause.
	* include/nuttx/compiler.h and other files:  Moved always_inline
	  and noinline __attributes__ here.  Also replaced all occurrences
	  of explicit __atributes__ in other files with definitions from
	  this header file.
	* drivers/mtd/w25.c:  The Windbond SPI FLASH W25 FLASH driver is
	  code complete (but still untested).
	* arch/arm/src/stm32/stm32_i2c.c:  I2C improvements from Mike Smith.
	  Unified configuration logic; dynamic timeout calculations;
	  I2C reset logic to recover from locked devices on the bus.
	* configs/*/*/Make.defs, tools/Config.mk, Makefile:  Refactor all
	  common make definitions from the various Make.defs files into
	  the common tools/Config.mk.  Add support for a verbosity options:
	  Specify V=1 on the make command line in order to see the exact
	  commands used in the build (Contributed by Richard Cochran).
	* drivers/net/enc28j60.c:  The ENC28J60 Ethernet driver is
	  now functional.
	* configs/fire-stm32v2:  Add support or the fire-stm32v3 board as
	  well (untested because I do not have a v3 board).
	* lib/stdio/lib_sscanf.c:  Add %n pseudo-format (from Kate).
	* lib/stdio/lib_sscanf.c:  There is an issue of handling input
	  when (1) no fieldwidth is provided and (2) there is no space
	  seperating the input values.  No solutions is in place for this
	  case now (either space or a fieldwidth must be provided).  But
	  at least some of the bad logic that attempted to handle this
	  case has been removed (noted by Kate).
	* arch/arm/src/stm32/stm32_eth.c:  DMA buffer sizes must be an
	  even multiple of 4, 8, or 16 bytes.
	* arch/arm/src/stm32/stm32_idle.c:  Fixes STM32F107 DMA issues:
	  We cannot go into sleep mode while Ethernet is actively DMAing.
	* configs/shenzhou/src/up_ssd1289.c:  Add infrastructure to support
	  SSD1289 LCD.  Initial checkin is just a clone of the
	  STM32F4Discovery's FSMC-based LCD interface.  The Shenzhou
	  will need a completely need bit-banging interface; this
	  initial check-in is only for the framework.
	* configs/shenzhou/src/up_ssd1289.c:  Bit-banging driver is
	  code complete.
	* configs/shenzhou/src/up_lcd.c:  Oops. Shenzhou LCD does not
	  have an SSD1289 controller.  Its an ILI93xx.  Ported the
	  STM3240G-EVAL ILI93xx driver to work on the Shenzhou board.
	* configs/shenzhou/nxwm:  Added an NxWM configuration for the
	  Shenzhou board.  This is untested on initial check-in.  It will
	  be used to verify the Shenzhou LCD driver (and eventually the
	  touchscreen driver).
	* configs/shenzhou/src/up_touchscreen.c:  Add ADS7843E touchscreen
	  support for the Shenzhou board.  The initial check-in is untested
	  and basically a clone of the touchscreen support for the SAM-3U.
	* tools/cfgparser.c: There are some NxWidget configuration
	  settings that must be de-quoted.
	* arch/arm/src/stm32/Kconfig: There is no SPI4.  Some platforms
	  support SPI3 and some do not (still not clear).
	* nuttx/configs/shenzhou: Various fixes to build new NxWM
	  configuration.
	* configs/shenzhou:  Oops.  The Shenzhou LCD is and SSD1289,
	  not an ILI93xx.
	* configs/shenzhou/src/up_ssd1289.c: The LCD is basically functional
	  on the Shenzhou board.
	* graphics/nxmu:  Correct some bad parameter checking that caused
	  failures when DEBUG was enabled.
	* arch/arm/src/armv7-m/nvic.h:  Add bit definitions for the AIRCR
	  register.
	* drivers/input/ads7843.c:  Need semaphore protection in logic
	  that samples the position.
	* drivers/lcd/ssd1289.c:  On some platforms we are unable to
	  read the device ID -- reason unknown; workaround in place.
	* drivers/input/ads7843.c:  Add thresholding options and an
	  option to swap X and Y positions.  Fix some logic errors in
	  the SPI locking/selecting logic.
	* arch/arm/src/armv7-m/up_systemreset.c:  Add logic to reset
	  the Cortex-Mx using the AIRCR register.  Contributed by Darcy
	  Gong.
	* arch/arm/src/stm32/up_eth.c:  Add logic specifically for the
	  DM9161 PHY.  If the DM9161 failed to initialize, then use the
	  up_sysemreset() logic to reset the MCU.  Contributed by Darcy
	  Gong.
	* arch/arm/src/stm32/stm32_gpio.c:  Add missing logic to set bit
	  for SPI3 remap.  This fixes the XPT2046 touchscreen driver using
	  drivers/input/ads7843.c
	* configs/shenzhou/src/up_ssd1289.c:  Fix naming error in
	  conditional compilation.
	* configs/shenzhou/nxwm/defconfig:  Disable reading from the LCD.
	  This does not work.  The hardware and the driver support the
	  capability, but there is some bug that causes memory corruption.
	  The work around for now:  Just disable reading from the LCD.
	* drivers/lcd/ssd1289.c:  Add some logic to reduce the amount of
	  output when CONFIG_DEBUG_LCD is enabled.
	* configs/shenzhou/nxwm/defconfig:  Bug found and fixed... The
	  original configuration had too much stuff turned on.  Reducing
	  stack sizes, some features, and buffer sizes made the
	  configuration reliable (Reading from the LCD is still disabled).
	* net/uip/uip_icmpping.c:  Fix problem that prevented ping from
	  going outside of local network.  Submitted by Darcy Gong

6.23 2012-11-05 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32/stm32_rng.c, chip/stm32_rng.h, and other files:
	  Implementation of /dev/random using the STM32 Random Number
	  Generator (RNG).
	* board.h file for shenzhou, fire-stm32v2, and olimex-stm32-p107:
	  Add frequencies for HSE, HSI, LSE, and LSI.  These are needed
	  by the STM32 watchdog driver.
	* CONFIG_EXAMPLES_*: To make things consistent, changed all occurrences
	  of CONFIG_EXAMPLE_* to CONFIG_EXAMPLES_*.
	* drivers/mtd/w25.c and configs/*/src/up_w25.c:  Several fixes for the
	  W25 SPI FLASH.
	* configs/*/Make.defs:  All buildroot tools now use the extension
	  xxx-nuttx-elf- vs. xxx-elf-
	* configs/shenzhou/*/Make.defs:  Now uses the new buildroot 4.6.3
	  EABI toolchain.
	* lib/stdio/lib_libdtoa.c:  Another dtoa() fix from Mike Smith.
	* configs/shenzhou/src/up_adc.c:  Add ADC support for the Shenzhou
	  board (Darcy Gong).
	* configs/shenzhou/thttpd:  Add a THTTPD configuration for the
	  Shenzhou board (Darcy Gong).
	* include/termios.h and lib/termios/libcf*speed.c: The non-standard,
	  "hidden" c_speed cannot be type const or else static instantiations
	  of termios will be required to initialize it (Mike Smith).
	* drivers/input/max11802.c/h, and include/nuttx/input max11802.h:  Adds
	  support for the Maxim MAX11802 touchscreen controller (contributed by
	  Petteri Aimonen).
	* graphics/nxtk/nxtk_events.c:  Missing implementation of the blocked
	  method.  This is a critical bugfix for graphics support (contributed
	  by Petteri Aimonen).
	* drivers/usbdev/pl2303.c, drivers/usbdev/usbmsc.h, and
	  include/nuttx/usb/cdcacm.h: USB_CONFIG_ATTR_SELFPOWER vs.
	  USB_CONFIG_ATT_SELFPOWER (contributed by Petteri Aimonen).
	* arch/arm/src/armv7-m/up_memcpy.S:  An optimized memcpy() function for
	  the ARMv7-M family contributed by Mike Smith.
	* lib/strings/lib_vikmemcpy.c:  As an option, the larger but faster
	  implemementation of memcpy from Daniel Vik is now available (this is
	  from http://www.danielvik.com/2010/02/fast-memcpy-in-c.html).
	* lib/strings/lib_memset.c: CONFIG_MEMSET_OPTSPEED will select a
	  version of memset() optimized for speed.  By default, memset() is
	  optimized for size.
	* lib/strings/lib_memset.c: CONFIG_MEMSET_64BIT will perform 64-bit
	  aligned memset() operations.
	* arch/arm/src/stm32/stm32_adc.c:  Need to put the ADC back into the
	  initial reset in the open/setup logic.  Opening the ADC driver works
	  the first time, but not the second because the device is left in a
	  powered down state on the last close.
	* configs/olimex-lpc1766stck/scripts:  Replace all of the identical
	  ld.script files with the common one in this directory.
	* configs/stm3220g-eval/scripts:  Replace all of the identical
	  ld.script files with the common one in this directory.
	* configs/hymini-stm32v/scripts:  Replace all of the identical
	  ld.script files with the common one in this directory.
	* configs/lpcxpresso-lpc1768/scripts:  Replace all of the identical
	  ld.script files with the common one in this directory.
	* binfmt/elf.c, binfmt/libelf, include/elf.h, include/nuttx/elf.h: Add
	  basic framework for loadable ELF module support.  The initial check-
	  in is non-functional and is simply the framework for ELF support.
	* include/nuttx/binfmt.h, nxflat.h, elf.h, and symtab.h:  Moved to
	  include/nuttx/binfmt/.
	* arch/sim/src/up_elf.c and arch/x86/src/common/up_elf.c:  Add
	  for ELF modules.
	* arch/arm/include/elf.h:  Added ARM ELF header file.
	* include/elf32.h:  Renamed elf.h to elf32.h.
	* configs/stm32f4discovery/ostest:  Converted to use the new
	  Kconfig-based configuration system.
	* configs/stm32f4discovery/elf and configs/stm32f4discovery/scripts/gnu-elf.ld
	  Add a configuration for testing the ARM ELF loader.
	* binfmt/libelf:  Can't use fstat(). NuttX does not yet support it.  Damn!
	* binfmt/libelf:  The basic ELF module execution appears fully functional.
	* configs/shenzhou/src/up_relays.c:  Add support for relays from the
	  Shenzhou board.  Contributed by Darcy Gong.
	* lib/fixedmath: Moved the old lib/math to lib/fixedmath to make room for
	  the math library from the Rhombus OS
	* lib/math: Now contains the math library from the Rhombus OS by Nick Johnson
	  (submitted by Darcy Gong).
	* include/float.h:  Add a first cut at the float.h header file.  This
	  really should be an architecture/toolchain-specific header file.  It
	  is only used if CONFIG_ARCH_FLOAT_H is defined.
	* lib/math: Files now conform to coding standards.  Separated float,
	  double, and long double versions of code into separate files so that
	  they don't draw in so much un-necessary code when doing a dumb link.
	* binfmt/libelf:  The ELF loader is working correctly with C++ static
	  constructors and destructors and all.
	* Documentation/NuttXBinfmt.html:  Add documentation of the binary loader.
	* configs/sim/ostest:  Converted to use the mconf configuration tool.
	* configs/sim/cxxtest:  New test that will be used to verify the uClibc++
	  port (eventually).
	* include/nuttx/fs/fs.h, lib/stdio/lib_libfread.c, lib_ferror.c,
	  lib_feof.c, and lib_clearerr.c:  Add support for ferror(), feof(),
	  and clearerror().  ferror() support is bogus at the moment (it
	  is equivalent to !feof()); the others should be good.
	* configs/stm32f4discovery/include/board.h:  Correct timer 2-7
	  base frequency (provided by Freddie Chopin).
	* include/nuttx/sched.h, sched/atexit.c, and sched/task_deletehook.c:
	  If both atexit() and on_exit() are enabled, then implement atexit()
	  as just a special caseof on_exit().  This assumes that the ABI can
	  handle receipt of more call parameters than the receiving function
	  expects.  That is usually the case if parameters are passed in
	  registers.
	* libxx/libxx_cxa_atexit():  Implements __cxa_atexit()
	* configs/stm32f4discovery/cxxtest:  New test that will be used to
	  verify the uClibc++ port (eventually).  The sim platform turned not
	  to be a good platform for testing uClibc++.  The sim example will not
	  run because the simulator will attempt to execute the static
	  constructors before main() starts. BUT... NuttX is not initialized
	  and this results in a crash.  On the STM324Discovery, I will have
	  better control over when the static constructors run.
	* RGMP 4.0 updated from Qiany Yu.
	* configs/*/Make.defs and configs/*/ld.script:  Massive clean-up
	  and standardization of linker scripts from Freddie Chopin.
	* net/netdev_ioctl.c:  Add interface state flags and ioctl calls
	  to bring network interfaces up and down (from Darcy Gong).
	* config/stm32f4discovery: Enable C++ exceptions.  Now the entire
	  apps/examples/cxxtest works -- meaning that the uClibc++ is
	  complete and verified for the STM32 platform.

6.24 2012-12-20 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32:  Support for STM32F100 high density chips
	  added by Freddie Chopin.
	* configs/stm32f100_generic:  Support for generic STM32F100RC board
	  contributed by Freddie Chopin.
	* arch/arm/src/stm32_otgfsdev.c:  Partial fix from Petteri Aimonen.
	* drivers/lcd/ug-2864ambag01.c and include/nuttx/lcd/ug_2864ambag01.h:
	  LCD driver for the Univision OLED of the same name (untested on
	  initial check-in).
	* configs/stm32f4discovery/nxlines:  Configure to use mconf/Kconfig
	  tool.
	* configs/stm32f4discovery/src/up_ug2864ambag01.c:  Board-specific
	  initialization for UG-2864AMBAG01 OLED connecte to STM32F4Disovery.
	* libxx/libxx_stdthrow.cxx:  Exception stubs from Petteri Aimonen.
	* configs/stm32f4discovery/src/up_ug2864ambag01.c: Driver has been
	  verified on the STM32F4Discovery platform.  Some tuning of the
	  configuration could improve the presentation.  Lower resolution displays
	  are also more subject to the "fat, flat line bug" that I need to fix
	  someday.  See http://www.nuttx.org/doku.php?id=wiki:graphics:nxgraphics
	  for a description of the fat, flat line bug.
	* libc:  Renamed nuttx/lib to nuttx/libc to make space for a true lib/
	  directory that will be forthcoming.  Also rename libraries:  liblib.a -> libc.a,
	  libulib.a -> libuc.a, libklib.a -> libkc.a, liblibxx.a ->libcxx.a.
	  (I will probably, eventually rename libxx to libcxx for consistency)
	* Makefile, lib/: A new, empty directory that will hold generated libraries.
	  This simplifies the library patch calculations and lets me get rid of some
	  bash logic.  The change is functional, but only partially complete;
	  additional logic is needed in the arch/*/src/Makefile's as well.  Right
	  now that logic generate multiple library paths, all pointing to the lib/
	  directory.
	* arch/*/src/Makefile:  Now uses only the libraries in lib/
	  Replace bash fragments that test for board/Makefile.
	* Makefile.win:  The beginnings of a Windows-native build.  This is just
	  the beginning and not yet ready for prime time use.
	* configs/stm32f4discovery/winbuild:  This is a version of the standard
	  NuttX OS test, but configured to build natively on Windows.  Its only
	  real purpose is to very the native Windows build logic.
	* tools/mkdeps.bat and tools/mkdeps.c:  mkdeps.bat is a failed attempt
	  to leverage mkdeps.sh to CMD.exe.  It fails because the are certain
	  critical CFLAG values that cannot be passed on the CMD.exe command line
	  (like '=').  mkdeps.c is a work in progress that will, hopefully,
	  replace both mkdeps.sh and mkdeps.bat.
	* tools/Config.mk:  Centralize the definition of the script that will be
	  used to generated header file include paths for the compiler.  This
	  needs to be centralized in order to support the Windows native build.
	* tools/incdir.bat:  A replacement for tools/incdir.sh for use with the
	  the Windows native build.
	* Makefile.unix:  The existing top-level Makefile has been renamed
	  Makefile.unix.
	* Makefile:  This is a new top-level Makefile that just includes
	  either Makefile.unix or Makefile.win
	* configs/stm3240g-eval/src:  Qencoder fixes from Ryan Sundberg.
	* arch/arm/src/stm32/stm32_qencoder.c: TIM3 bug fix from Ryan Sundberg.
	* tools/mkromfsimg.sh: Correct typo in an error message (Ryan Sundberg)
	* arch/*/src/Makefile:  Remove tftboot install and creation of System.map
	  for Windows native build.  The first is a necessary change, the second
	  just needs re-implemented.
	* configs/mirtoo: Update Mirtoo pin definitions for Release 2.  Provided
	  by Konstantin Dimitrov.
	* Fixed an uninitialized variable in the file system that can cause
	  assertions if DEBUG on (contributed by Lorenz Meier).
	* Config.mk:  Defined DELIM to be either / or \, depending upon
	  CONFIG_WINDOWS_NATIVE.  This will allow me to eliminate a lot of
	  conditional logic elsewhere.
	* nuttx/graphics: One a mouse button is pressed, continue to report all
	  mouse button events to the first window that received the initial
	  button down event, even if the mouse attempts to drag outside the
	  window. From Petteri Aimonen.
	* nuttx/graphics/nxmu/nx_block.c:  One more fix to the NX block message
	  logic from Petteri Aimonen.
	* include/nuttx/wqueue.h: Some basic definitions to support a user-
	  space work queue (someday in the future).
	* graphics/nxmu:  Add semaphores so buffers messages that send buffers
	  will block until the buffer data has been acted upon.
	* graphics/nxmw:  Extended the blocked messages to cover mouse movement
	  and redraw events.  These will also cause problems if sent to a window
	  while it is closing.
	* arch/several:  Change UARTs are enabled for i.MX, LM3S, ez80, and M16C to
	  match how they are enabled for other architectures.
	* configs/ez80f910200kitg:  Convert to use mconf configuration.
	* sched/pause.c:  Implements the POSIX pause() function.
	* ez80: Lots of changes to ez80 configurations and build logic as I
	  struggle to get a clean Windows build (still not working).
	* configs/cloudctrl:   Darcy Gong's CloudController board.  This is a
	  small network relay development board. Based on the Shenzhou IV development
	  board design.  It is based on the STM32F107VC MCU.
	* arch/arm/src/stm32_serial.c and stm32_lowputc.c:  Added optional RS-485
	  direction bit control. From Freddie Chopin.
	* Lots of build files:  ARMv7-M and MIPS32 Make.defs now include a common
	  Toolchain.defs file that can be used to manage toolchains in a more
	  configurable way.  Contributed by Mike Smith
	* configs/stm32f4discovery/winbuild and configs/cloudctrl:  Adapted to use
	  Mike's Toolchain.defs.
	* tools/configure.sh:  Adapted to handle paths and setenv.bat files correctly
	  for native Windows builds.
	* More of build files:  AVR and AVR32 Make.defs now include a common
	  Toolchain.defs file that can be used to manage toolchains in a more
	  configurable way.  Contributed by Mike Smith
	* tools/incdir.sh and incdir.bat: Add -s option to generate system header
	  file paths.
	* nuttx/arch/arm/src/arm/Toolchain.defs: Add support for more ARM toolchains
	  (from Mike Smith).
	* arch/arm/src/stm32/stm32f40xxx_rcc.c:  Enabled FLASH prefetch (from Petteri
	  Aimonen).
	* graphics/nxtk/nxtk_filltrapwindow.c:  Correct an offset problem (from
	  Peterri Aimonen).
	* graphics/nxglib/nxglib_splitline.c:  Fix error in drawing of near horizontal
	  lines (from Peterri Aimonen).
	* sched/task_exithook.c:  Missing right bracket with certain conditional
	  compilation (thanks James Goppert).
	* arch/arm/srch/stm32/stm32_otgfshost.c:  Replace timeout handling; use
	  system tick instead of frame counter.  The frame counter gets reset to
	  zero at 0x3fff making it error prone.
	* arch/arm/src/stm32/stm32f20xx_rcc.c and stm32f40xx_rcc.c: Added option
	  CONFIG_STM32_FLASH_PREFETCH.  FLASH prefetch will now only be enabled
	  if this option is selected.
	* configs/ez80f910200zco/ostest:  Now uses Kconfig/mconf configuration
	  tool. Updated to build in native Windows environment.  Other ez80f910200zco
	  build scripts also updated.
	* configs/z8f64200100kit/ostest: Update to same level as ez80 configurations.
	* nuttx/configs/z8f64200100kit/scripts/setenv.bat: Add support for native
	  Windows build.
	* nuttx/arch/arm/src/lpc17xx/lpc17_i2c.c: Resources not being released when
	  I2C is uninitialized.
	* cloudctrl/src/up_chipid.c and shenzhou/src/up_chipid.c:  Add functions to
	  get chip ID.  Contributed by Darcy Gong.  These should not be board-dependent,
	  but should be in arch/arm/src/stm32 where they can be used from any board.
	* sched/work_thread.c: Fix backward conditional compilation.  This might
	  has caused a memory leak.  From Freddie Chopin.
	* configs/<many>/Make.defs:  Fix typo -wstrict-prototypes should be
	  -Wstrict-prototypes (From Denis Carilki).
	* arch/arm/src/calapyso/calypso_keypad.c:  Add Calypso keypad driver.  From
	  Denis Carilki.
	* z8encore000zco/ostest and z8f64200100kit/ostest:  Converted to use Kconfig/
	  mconf configuration tool.
	* arch/arm/src/armv7-m/up_exception.S: missing curly braces for push/pop
	  From Freddie Chopin.
	* z8encore000zco/ostest and z8f64200100kit/ostest:  Can now be modified to
	  support the Windows native builds (see corresponding README.txt files).
	* configs/z16f2800100zcog - All configurations updated to use the ZDS-II
	  5.0.1 toolchain.
	* configs/z16f2800100zcog - All configurations updated to use Kconfig/mconf
	  configuration tools.
	* configs/z16f2800100zcog/ostest - Now supports a native Windows build
	  (other ZNEO configs may also support the native build, but this has not
	  been verfiied).
	* include/nuttx/input/keypad.h, arch/arm/src/calypso/calypso_keypad.c, and
	  configs/compal_e99/nsh_highram: First cut at a standard keypad interface
	  definition.  Contributed by Denis Carikli.
	* libc/stdlib/lib_rand.c:  Always add one to result congruential generators
	  to avoid the value zero.  Suggested by Freddie Chopin.
	* tools/b16.c:  Fixed precision math conversion utility.
	* graphics/nxglib/nxglib_splitline.c:  Fix the "fat, flat line bug"
	* arch/z80/src/*/Toolchain.defs:  Add dummy Toolchain.defs files for the
	  z80 family.
	* configs/z80sim/ostest:  Converted to build with the Kconfig/mconf tool.
	  Current configuration failed to build for me (Ubuntu 12.10, SDCC 3.2.0
	  pre-built for Linux) due to a glibc memory corruptionerror in SDCC.
	* configs/z80sim/ostest: Default is now the Windows native build.  See
	  configs/z80sim/README.txt for instructions to convert back to a Linux or
	  or Cygwin build.
	* arch/z80/src/Makefile.sdccw:  Renamed makefiles with extensions zdiil,
	  zdiiw, sdccl, and sdccw for the ZDS-II vs SDCC compilers and for the
	  POSIX vs Windows native builds.
	* nuttx/drivers/mtd/ftl.c:  Fix for the flash translation layer. Short
	  unaligned writes were buggy.  From Petteri Aimonen.
	* nuttx/libc/math/lib_round*.c:  Add rounding functions to the math
	  library.  Contributed by Petteri Aimonen.
	* include/cxx/cstdlib:  Add stroul().  From Petteri Aimonen.
	* arch/*/include/limits.h:  Change signed minimum values from, for example,
	  (-128) to (-127 - 1) to avoid overflows under certain conditions.  From
	  Peterri Aimonen.
	* graphics/nxtk/nxtk_subwindowmove.c: Previously it was very difficult to
	  do e.g. "scroll by dx, dy". When given the full window area, nxtk_subwindowmove
	  would clip the offset always to 0,0. It makes more sense for it to clip the
	  source area and not modify the offset.  From Petteri Aimonen.
	* graphics/nxtk/nxtk_getwindow.c: Clipping would change the offset of returned
	  data, and caller has no way to know what the new offset would be. This messes
	  up font drawing when the text is partially out of window, e.g. when scrolling.
	  Also from Petteri Aimonen.
	* include/stdbool.h: Can now be disabled for C++ files if CONFIG_C99_BOOL8 is
	  defined.  CONFIG_C99_BOOL8 indicates (1) that the sizeof(_Bool) is one in both
	  C and C++, and (2) the C compiler is C99 and supports the _Bool intrinsic
	  type. Requested by Freddie Chopin.
	* include/stdlib/lib_rand.c:  Various additional changes so that the integer
	  value zero can be returned.  Requested by Freddie Chopin.
	* arch/z80/src/Makefile.sdcc*, z80/up_mem.h:  Redesign Z80 build so that it
	  no longer depends on Bash scripts.
	* configs/z80sim/nsh and pashello:  Converted to (1) use the kconfig-frontends
	  configuration tool, and (2) to build natively under Windows.  The NSH
	  configuration is verified; the pashello configuration needs a more TLC.
	* tools/copydir.sh:  Rename tools/winlink.sh to tools/copydir.sh
	* tools/link.bat, unlink.bat, and copydir.bat:  Add Windows counterparts
	  to the link.sh, unlink.sh, and copydir.sh Bash scripts.
	* configs/z80sim/pashello:  Now builds correctly.
	* configs/xtrs/ostest, nsh, and pashello:  Converted to (1) use the kconfig-
	  frontends configuration tool, and (2) to build natively under Windows.
	* drivers/serial/Kconfig and sched/Kconfig:  Two names for same configuration:
	  CONFIG_LOWLEVEL_CONSOLE is bogus and CONFIG_DEV_LOWCONSOLE is in the wrong
	  Kconfig file.  Moved to drivers/serial/Kconfig replacing CONFIG_LOWLEVEL_CONSOLE.
	* arch/z80/include/z180:  Add header files for z180 chips.  Initial versions
	  are just clones of z80 header files.
	* arch/z80/src/z180:  Add source files for z180 chips.  Initial versions
	  are just clones of z80 source files.
	* include/nuttx/arch.h:  Add address environment control interfaces (for use
	  with CPUs the provide MCUs and support process-like address environments).
	* arch/z80/src/z180/z180_mmu.*:  Add MMU support for z180 tasks.
	* configs/p112:  Add very basic board support and an examples/ostest
	  configuration for the venerable P112 board.
	* sched/os_bringup.c: If CONFIG_PATH_INITIAL is defined, then the initial
	  environment of the task started by os_bringup() will have the PATH
	  environment variable defined to be that string.
	* binfmt/binfmt_exepath.c:  If CONFIG_BINFMT_EXEPATH is defined, then this
	  file will be built.  It contains logic to search for regular files at
	  the absolutes paths found in the current PATH environment variable
	  setting.  This is untested and not yet hooked into the binfmt exec()
	  logic on initial check-in
	* binfmt/binfmt_loadmodule.c: load_module() will now traverse the PATH
	  variable to locate files from their relative path.
	* include/nuttx/arch.h and arch/z80/src/z180/z180_mmu.c:  Restructure the
	  address environment interfaces so that they will better integrate with
	  binfmt/.
	* binfmt/libelf/*, binfmt/libnxflat/* and other files:  Integrate the
	  address environment interfaces.  If CONFIG_ADDRENV=y, then binfmt/
	  will now create an address environment for new tasks (instead of
	  just malloc'ing the task memory).
	* configs/stm32f4discovery/elf:  Enable support/test of the PATH
	  to find executables using a relative path.

6.25 2013-02-01 Gregory Nutt <gnutt@nuttx.org>

	* graphics/: Adds 5x8 monospace font. This tiny font is useful for graph
	  labels and for small bitmapped display.  Contributed by Petteri
	  Aimonen.
	* configs/stm3220g-eval/nxwm:  Converted to use the kconfig-frontends
	  configuration tool.
	* configs/sim/nxwm:  Converted to use the kconfig-frontends configuration
	  tool.
	* include/pthread.h:  In sys/prctl.h because it is needed by
	  pthread_[set|get]name_np()
	* tools/kconfig.bat:  Kludge to run kconfig-frontends from a DOS shell.
	* sched/sig_timedwait.c:  Should always move the time up to the next
	  largest number of system ticks.  The logic was rounding.  Noted by
	  Petteri Aimonen.
	* arch/arm/src/up_head.S:  Fix backward conditional compilation.  NOTE
	  there is a issue of ARM9 systems with low vectors and large memories
	  that will have to be addressed in the future.
	* libc/misc/lib_kbdencode.c and lib_kbddecode.c:  Add logic to marshal
	  and serialize speical keyboard commands intermixed with normal ASCII
	  data (not yet hooked into anything).
	* drivers/usbhost/usbhost_hidkbd.c:  If CONFIG_HIDKBD_ENCODED is
	  defined, this driver will now use libc/misc/lib_kbdencode.c to
	  encode special function keys.
	* configs/olimex-lpc1766stk/hidkbd:  This configuration has been
	  converted to use the kconfig-frontends configuration tool.
	* drivers/lcd/ug-2864hsweg01.c and include/nuttx/lcd/ug-2864hsweg01.h:
	  Driver for UG-2864HSWEG01 OLED contributed by Darcy Gong.
	* configs/stm32f4discovery/src/up_ug2864hsweg01.c: Support for the
	  UG-2864HSWEG01 OLED for the STM32F4Discovery board.
	* drivers/usbhost/usbhost_hidkbd.c:  Correct a logic error in how
	  tasks waiting for read data are awakened.
	* libc/misc/lib_kbdencode.c and lib_kbddecode.c:  Now handles keypress
	  events too.  However, the USB HID keyboard driver has not yet been
	  updated to detect key release events.  That is kind of tricky in
	  the USB HID keyboard report data.
	* configs/mcu123-214x/nsh:  Converted to use the kconfig-frontends
	  configuration tool.
	* configs/zp214xpa:  Add basic support for the The0.net ZP213x/4xPA
	  board (with the LPC2148 and the UG_2864AMBAG01).
	* configs/sim/nxlines:  Add an nxlines configuration for the
	  simulator.
	* configs/zp214xpa/nxlines:  Add an nxlines configuration for the
	  ZP213x/4xPA (with the LPC2148 and the UG_2864AMBAG01).  Working
	  as of 2012-12-30.
	* configs/olimex-lpc1766stk/wlan:  Remove non-functional
	  configuration.
	* configs/stm32f4discovery/src and nuttx/drivers/lcd/ug-2864hsweg01.c:
	  Updates and corrections for the UG-2864HSWEG01 from Darcy Gong.
	* configs/lm326965-ek:  All configurations converted to use the
	  kconfig-frontends configuration tool.
	* configs/Kconfig: NSH_MMCSDSPIPORTNO should depend on MMCSD_SPI,
	  not just SPI (from Jose Pablo Carballo).
	* arch/arm/src/arm/Kconfig and armv7m/Kconfig:  Add an option for
	  buildroot toolchains:  They may be EABI or OABI.
	* include/nuttx/progmem and arch/arm/src/stm32/stm32_flash.c:
	  Fix a counting bug plus change interface to use either relative
	  or absolute FLASH addressing (from Freddie Chopin).
	* libc/misc/Make.defs:  Fix error in conditional for KBD CODEC.
	* libc/Kconfig and configs/*/defconfig (several):  The default
	  setting should be CONFIG_LIB_KBDCODEC=n
	* tools/configure.c:  configure.c can be used to build a work-alike
	  program as a replacement for configure.sh.  This work-alike
	  program would be used in environments that do not support Bash
	  scripting (such as the Windows native environment).
	* tools/configure.bat: configure.bat is a small Windows batch
	  file that can be used as a replacement for configure.sh in a
	  Windows native environment.  configure.bat is actually just a
	  thin layer that executes configure.exe if it is available. If
	  configure.exe is not available, then configure.bat will attempt
	  to build it first.
	* arch/arm/src/lpc17xx/lpc17_syscon.h:  Correct some typos in bit
	  definitions (from Rommel Marcelo).
	* libc/string/lib_strndup.c: strndup() should use strnlen(), not
	  strlen(), to determine the size of the string.
	* sched/os_bringup.c:  Remove support for CONFIG_BUILTIN_APP_START.
	  This is not really a useful feature and creates a violation of the
	  OS layered architecture.
	* include/unistd.h, arch/arch/src/*:  Implement a simple vfork().
	  On initial checkin, this API is available only for ARM platforms.
	* binfmt/binfmt_exec.c: exec() now sets the priority of the new task
	  to the same priority as the current task (instead of the arbirtrary
	  value of 50).
	* libc/unisted/lib_execv.c and lib_execl.c:  New, somewhat flawed,
	  implementations of execv() and execl().
	* tools/cfgdefine.c:  Strips quotes from CONFIG_EXECFUNCS_SYMTAB
	  value.
	* arch/arm/include/lm3s/chip.h:  Move chip definitions into
	  public include area for compatibility with other architectures.
	* arch/arm/src/lm3s/chip:  Move register definition header files
	  into a new chip/ sub-directory.
	* arch/arm/src/lm3s/lm3s_internal.h:  Broke up into several
	  smaller header files.
	* arch/arm/src/lm:  Rename the arch/arm/src/lm3s directory to
	  arch/arm/src/lm so that is can support other members of the
	  Stellaris family.
	* libc/spawn:  Add file action interfaces needed by posix_spawn().
	* sched/clock_time2ticks.c:  Another case where time was being
	  rounded down instead of up (from Mike Smith).
	* libc/spawn:  Implementation of posix_spawn() is complete but
	  untested and undocumented.
	* drivers/usbdev/pl2303.c:  Fix typols in the PL2303 driver
	  (from Max Holtzberg).
	* configs/stm32f4discovery/posix_spawn:  Added a configuration
	  that can be used for testing posix_spawn().
	* arch/arm/src/stm32: Bring F1 support for general DMA and serial
	  DMA in paricular up to parity with F2/F4 (from Mike Smith).
	* libc/stdio/lib_libfread.c:  Correct some error handling when
	  lib_fread() was passed a bad stream.  Needed to move the
	  releasing of a semaphore inside of some conditional logic
	  (cosmetic).
	* include/nuttx/sched.h, sched/task_setup.c, and sched/task_exithook.c:
	  Add support for remembering the parent task and sending
	  SIGCHLD to the parent when the task exists.
	* sched/task_exithook.c:  Fixed a *critical* bug.  Here is
	  the scenario: (1) sched_lock() is called increments the lockcount
	  on the current TCB (i.e., the one at the head of the ready to run
	  list), (2) sched_mergepending is called which may change the task
	  at the head of the ready-to-run list, then (3) sched_unlock() is called
	  which decrements the lockcount on the wrong TCB.  The failure case
	  that I saw was that pre-emption got disabled in the IDLE thread,
	  locking up the whole system.
	* sched/sched_waitpid.c:  Use SIGCHLD instead of a semaphore.  This
	  is a much more spec-compliant implementation.  However, there are
	  some issues with overruning signals because NuttX does not support
	  queueing of signals (POSIX does not require it).  I think it may
	  need to.
	* sched/sched_waitid.c and sched_wait.c:  Add support for waitid()
	  and wait().  See issues with waitpid() above.
	* include/nuttx/fs/fs.h and fs/fs_files.c:  Add a dup() method to
	  the struct mountpt_operations.  When dup'ing a file that resides
	  on a mounted volume, let the file system's dup() method do the
	  work.
	* fs/romfs/fs_romfs.c: Implemented the dup() method for the ROMFS
	  file system.
	* fs/fat/fs_fat32.c, fs/nxffs/nxffs_initialize, and
	  fs/nfs/nfs_vfsops.c:  Add hooks for dup() method (not yet
	  implemented).
	* fs/romfs:  Remove the rf_open flag.  It looks good, but actually
	  does nothing.
	* fs/fat:  Remove the ff_open flag.  Same story as for the ROMFS
	  rf_open flag.
	* fs/fat/fs_fat32.c, fs/nxffs/nxffs_initialize, and
	  fs/nfs/nfs_vfsops.c:  Completed implementation of the dup() methods.
	  There is still no good test available.
	* sched/sig_timedwait.c:  sigtimedwait() would return a bad signal
	  number if the signal was already pending when the function was
	  called.
	* configs/ubw32/scripts:  All common linker scripts moved to this
	  scripts sub-directory
	* configs/ubw32/ostest:  Configuration configured to use the
	  kconfig-frontends tools.
	* arch/mips/src/mips32/up_vfork.c, up_vfork.h, and vfork.S:
	  Implement vfork() for MIPS32 (no floating point support)
	* configs/ubw32/ostest: Enable the vfork() test.
	* fs/binfs:  Move apps/builtin/binfs.c to fs/binfs/fs_binfs.c
	  CONFIG_APPS_BINDIR rename CONFIG_FS_BINFS
	* include/nuttx/binfmt/builtin.h:  Some of the content of
	  apps/include/apps.h moved to include/nuttx/binfmt/builtin.h
	* binfmt/libbuiltin/libbuiltin_utils.c:  Move builtin
	  utility functions from apps/builtin/exec_builtins.c to
	  binfmt/libbuiltin/libbuiltin_utils.c
	* binfmt/builtin.c and binfmt/libbuiltin:  Add a binary "loader"
	  that can be used to execute builtin programs from the BINFS
	  file system.
	* configs/sim/nsh: Convert to use kconfig-frontends configuration
	  tool.
	* binfmt/binfmt_schedunload.c:  Add logic based on SIGCHLD to
	  automatically unload and clean-up after running a task that
	  was loaded into memory.
	* binfmt/libbuiltin: Extensions from Mike Smith
	* sched/task_reparent.c:  Add internal interface to change the
	  parent task.
	* sched/task_posixspawn():  Move libc/spawn/lib_ps.c to
	  sched/task_posixspawn() now it requires internal, reparenting
	  interfaces
	* include/nuttx/spawn():  Move libc/spawn.h to include/nuttx/spawn.h
	* arch/arm/include/lpc17xx/chip.h, irq178x.h:  Integrate Marcelo
	  Rommel's LPC1788 definitions into the base LPC17xx.
	* configs/olimex-lpc1766stk/nsh:  Convert configuration to use
	  the kconfig-frontends tools.
	* sched/task_reparent.c:  Simplify reparenting interface.
	* arch/arm/src/[many]: More LPC1788 definitions from Rommel
	  Marcelo incorporated.
	* configs/open1788:  Board configuration for the Wave Share
	  Open1788 board.  Still fragmentary (contributed by Rommel
	  Marcelo, adapted to use kconfig-frontends.
	* net/send():  Add logic to work around delayed ACKs by splitting
	  packets (contributed by Yan T.).
	* net/recvfrom():  Fix a bug.  When the host closes a connection
	  (gracefully).  recv[from]() returned success and the closure
	  was never detected.  Hmmm.. I don't know why the network monitor
	  did not catch this event.  This is an important bug fix.
	* net/recvfrom():  Fix a introduced with the last bugfix.  If
	  the peer does an orderly closure of the socket, report 0 not
	  -ENOTCONN
	* configs/lm3s6965-ek/README.txt and tools/:  Add an OpenOCD
	  configuration for the LM3S (from Jose Pablo Carballo).
	* nuttx/lcd/hd4478ou.h and configs/pcblogic-pic32mx/src/up_lcd1602:
	  Start of support of LCD1602 alphanumeric LCD.  I need a few
	  more parts before I can finish integrating this one.
	* arch/arm/src/*/chip.h and arch/arm/include/*/chip.h:  Move all
	  priority ranges from the src to the include chip.h header file.
	* arch/arm/include/armv7-m/irq.h:  Add inline functions to enable
	  and disable interrupts via the BASEPRI register.
	* arch/arm/Kconfig:  Add new option CONFIG_ARM7VM_USEBASEI
	* arch/arm/src/*/*_irq.c:  Set the priority of the SVCALL exception
	  to the highest possible value.
	* arch/armv7-m/up_hardfault.c:  Fail if a hardfault occurs
	  while CONFIG_ARM7VM_USEBASEPRI=y.
	* arch/arm/src/stm32/stm32_serial.c:  Add support for USART
	  single wire mode (Contributed by the PX4 team).
	* sched/: Implement support for retaining child task status after
	  the child task exists.  This is behavior required by POSIX.
	  But in NuttX is only enabled with CONFIG_SCHED_HAVE_PARENT and
	  CONFIG_SCHED_CHILD_STATUS
	* Add support for keyboard encode to the keypad test (from
	  Denis Carikli).
	* configs/olimex-lpc1766stk/nettest:  Configuration converted to
	  use the kconfig-frontends tools.
	* net/net_poll.c:  Split net_poll() to create psock_poll() too.
	* net/net_poll.c:  Fix poll/select issure reported by Qiang:
	  poll_interrupt() must call net_lostconnection() when a
	  loss of connection is reported.  Otherwise, the system will
	  not know that the connection has been lost.
	* sched/group_create.c, group_join.c, and group_leave.c:  Add
	  support for task groups.
	* sched/group_signal.c and task_exithook.c:  Send signal to all
	  members for the parent task group.
	* include/nuttx/sched.h and sched/env_*.c:  Move environment
	  variables into task group structure.
	* sched/: Lots of file changed.  Don't keep the parent task's
	  task ID in the child task's TCB.  Instead, keep the parent
	  task group IN the child task's task group.
	* fs/, sched/, include/nuttx/sched.h, and include/nutts/fs/fs.h:
	  Move file data from the TCB to the task group structure.
	* libc/stdio/, sched/, include/nuttx/lib.h, and include/nutts/fs/fs.h:
	  Move stream data from the TCB to the task group structure.
	* net/, sched/, and include/nuttx/net/net.h:  Move socket data
	  from the TCB to the task group structure.
	* sched/task_starthook.c, sched/task_start.c, and include/nuttx/sched.h:
	  Add a task start hook that will be called before the task main
	  is started. This can be used to schedule C++ constructors to run
	  automatically in the context of the new task.
	* binfmt/binfmt_execmodule: Execute constructors as a start hook.
	* sched/os_start.c: Fix ordering of group initialization.
	* configs/stm32f4discovery/usbnsh:  Add an NSH STM32F4Discovery
	  configuration that uses USB CDC/ACM for the NSH console.
	* configs/stm32f4discovery/nsh: Converted to use the kconfig-frontends
	  tools.
	* configs/*/src/up_userleds.c: Fix a error that was cloned into
	  all STM32 user LED code.  The wrong definitions were being used
	  to set LEDs on or off.
	* arch/*/common/up_internal.h and arch/*/common/up_initialize.c:
	  Serial was driver was not being built if there is no console
	  device.  Obviously, the serial driver may be needed even in
	  this case.
	* arch/arm/src/stm32/stm32_serial.c: If there is a serial console,
	  it would be ttyS0 and the others would be ttyS1-5.  If there
	  is not serial console, was labeling them ttyS1-6; now labels them
	  ttyS0-5.
	* fs/fs_syslog.c: Can't handle SYSLOG output to character device from
	  the IDLE task (because it can't block). syslog_putc now returns EOF
	  on failure and sets errno.  Fixed some errors in error handling.
	* libc/stdio/lib_syslogstream.c:  Checking of return value from
	  syslog_putc was bogus.  Switching to EOF for all errors solves
	  this.
	* arch/arm/src/lm/chip/lm4f_memorymap.h: More LM4F changes from
	  Jose Pablo Carballo.
	* drivers/serial/serial.c, include/nuttx/serial/serial.h,
	  drivers/usbdev/cdcacm.c, and drivers/pl2303.c: Add support for
	  removable serial devices (like USB serial).  This support is enabled
	  by CONFIG_SERIAL_REMOVABLE.
	* arch/*/src/*/Toolchain.defs: Change assignment so that we can
	  override CROSSDEV with a make command line argument.
	* include/assert.h:  Mark assertion functions as non-returning.
	* arch/*/src/*/up_assert.h:  Mark _up_assert() as non-returning.
	* drivers/mtd/at25.c: When the AT25 device was not available the
	  initialization did not fail like it should. From Petteri Aimonen.
	* fs/fat/fs_configfat.c:  Fix some errors in FAT formatting logic
	  for large devices and for FAT32. From Petteri Aimonen.
	* fs/fat/fs_fat32util.c:  Fix an initialization error found by
	  Petteri Aimonen.  freecount and next freecount initialization were
	  reversed.
	* drivers/mmcsd/mmcsd_spi.c: Some SD cards will appear busy until
	  switched to SPI mode for first time.  Having a pull-up resistor on
	  MISO may avoid this problem, but this patch makes it work also
	  without pull-up.  From Petteri Aimonen.
	* fs/fat/fs_fat32.c: Fix a compilation error when FAT_DMAMEMORY=y.
	  From Petteri Aimonen.
	* arch/arm/src/stm32/chip/stm32_spi.h: STM32F4 max SPI clock freq is
	  37.5 MHz.  Patch from Petteri Aimonen.
	* arch/arm/src/stm32/stm32_spi.c: Fixes for SPI DMA work on the
	  STM32F4. Includes untested additions for the F1 implementation as
	  well.  From Petteri Aimonen.

6.26 2013-03-15 Gregory Nutt <gnutt@nuttx.org>

	* drivers/serial/serial.c:  Correct some race conditions when checking
	  for disconnection of a removable serial device.
	* sched/task_posixspawn.c, task_spawn.c, task_spawnparms.c and
	  spawn_internal.h:  Create new interface task_spawn() that is
	  like posix_spawn(), but uses entry point addresses like
	  task_create().
	* Corrected all argv[] arguments. Should be char * const *, not
	  const char **.
	* sched/pthread* and include/nuttx/sched: Move pthread join data
	  and pthread key calculation data into the "task group" structure.
	* sched/atexit.c, on_exit.c, task_exithook.c and include/nuttx/sched.h:
	  Move atexit and on_exit data structures to task group.  These
	  callbacks are only issued now when the final member of the task
	  group exits.
	* sched/waitpid.c, task_exithook.c and include/nuttx/sched.h:
	  Move waitpid data data structures to task group.  Callers of
	  of waitpid() are now only awakened when the final thread of the
	  task group exits.
	* sched/mq_descreate.c, mq_open.c, mq_remove.c, group_leave.c, and
	  include/nuttx/sched.h:  Move list of opened message queues to
	  the task group structures.  Now all message queues opened by
	  members of the group are closed when the last member of the group
	  exits.
	* includes/nuttx/sched.h and Lots of files:  Change name of _TCB to
	  struct tcb_s so that (1) it is consitent with other NuttX naming and
	  so that (2) the naming can handle some upcoming changes.
	* includes/nuttx/sched.h and sched/:  There are three TCB structures:
	  struct tcb_s is a generic common version, struct task_tcb_s is a
	  version for tasks and kernel threads and pthread_tcb_s is a version
	  for pthreads.  By dividing the TCB structure into these variants,
	  pthreads do not have to be burdened by task-specific data structures
	  (and vice versa).
	* sched/task_exithook.c adn group_create.c:  Fix an error, the
	  task within the task group may exit early leaving a pthread to
	  exit the task group last.  In this case, we need to remember the
	  the PID of the main task in the task group and use that PID for
	  signalling SIGCHILD to the parent task group.
	* included/nuttx/sched.h and sched/sig*.c:  Numerous changes to the
	  signal deliver logic so that the delivery of signals to threads
	  within a task group will be compliant with delivery of signals
	  to threads within a POSIX process.
	* sched/mq_recover.c and task_exithook.c:  Add logic to handle the
	  case where a task is deleted (or pthread canceled) while it is
	  waiting on a message queue.  task_delete() and pthread_cancel()
	  are dangerous interfaces.  This is only one feeble recover measure
	  of *many* that would be needed to do this safely.
	* sched/group_killchildren.c, task_recover.c, group_foreachchild.c,
	  sched/restart.c, sched/task_delete.c, and others:  Beef up logic
	  to better support task deletion and pthread cancellation.  Needed
	  to pass need OS test case for task_restart().
	* sched/include/sched.h and all timed functions in sched/:  Move
	  timer from local variables to TCB.  This is needed so that if a
	  task is canceled or restarted while it is waiting for a timed
	  event, we can gracefully recover.  We can't let the timer expire
	  after the task has been deleted.
	* arch/arm/include/stm32 and arch/arm/src/stm32:  Add support for
	  the STM32 F3 family (still missing some things).
	* configs/stm32f3discovery:  This will (eventually) be support for
	  the STM32F3Discovery board.
	* STM32 F3 and STM32F3Discovery port is complete a ready for test.
	* arch/arm/src/lpc17xx: Add support for the Cortex-M4 FPU and
	  Mikes "common vector" logic.  The LPC1788 is going to need
	  these things.
	* arch/arm/src/stm32/stm32_spi.c:  Fix SPI DMA logic that does
	  not work if sem_wait() is interrupt by a signal.  From Petteri
	  Aimonen.
	* drivers/input/max11802.c: MAX11802: Fix a timing bug that
	  corrupted coordinates.  From Petteri Aimonen.
	* drivers/mmcsd/mmcsd_spi.c:  Use SPI locking so that MMC/SD can
	  exist on the same bus as other SPI devices.  From Petteri
	  Aimonen.
	* graphics/nxfonts/nxfonts_sans17x22.h: Small mod to hyphen in
	  sans17x22 font.  The hyphen did not have any space on its sides.
	  This caused it to run together with other characters so that for
	  example "+-" would look weird. From Petteri Aimonen.
	* mm/mm_mallinfo.c:  Take MM semaphore in mm_mallinfo. From Petteri
	  Aimonen.
	* configs/stm32f3discovery/nsh/defconfig:  Disable SPI.  It is not
	  used.
	* drivers/mtd/sst39vf:  Add a driver for the SST29VF NOR FLASH parts.
	* sched/os_start.c:  Add an additional call-out to support board-
	  specific driver initialization during the start phase:  If
	  CONFIG_BOARD_INITIALIZE is defined, then an additioinal
	  initialization function called board_initialize() will be called
	  just after up_initialize() is called and just before the initial
	  application is started.
	* arch/arm/src/stm32/stm32_otgfsdev.c, drivers/usbdev/usbdev_trprintf.c,
	  and include/nuttx/usb/usbdev_trace.h:  Add logic to support decoding
	  of device-specific trace events to make the trace ouput more readable.
	  From Petteri Aimonen.
	* arch/arm/src/stm32/stm32_otgfsdev.c:  Need to manually set CNAK in
	  the case where we are waiting for a SETUP command with DATA.  Otherwise,
	  the core may NAK further transactions.  From Petteri Aimonen.
	* arch/arm/src/stm32/stm32_otgfsdev.c: Add logic to prevent premature
	  to IDLE state.  This change (plus the previous) was necessary to get
	  the CDC/ACM driver working the certain STM32 F4 hardware (but not others).
	  These changes appear to prevent certain race conditions that may or may
	  not cause USB problems.  From Petteri Aimonen.
	* arch/arm/include/armv6-m and arch/arm/src/armv6-m: First cut at support
	  for the Cortex-M0
	* configs/nutiny-nuc120, arch/arm/include/nu1xx, and arch/arm/src/nuc1xx:
	  Support for Nuvoton NuTiny NUC120.
	* 2013-02-22:  the Cortex-M0, NuvoTron NUC1xx, and NuTiny-SDK-NUC120 port
	  is code complete and ready for testing.
	* configs/ekk-lm3s9b96/ostest and nsh:  All EKK-LM3S9B96 configurations
	  converted to use the mconf configuration tool.
	* configs/zkit-arm-1769:  Add support for Zilogic System's ARM development
	  Kit, ZKIT-ARM-1769.  From Rashid.
	* configs/zkit-arm-1769/hello:  Add a "Hello, World!" configuration for
	  the KBIT-ARM-1769 board.  From Rashid.
	* configs/zkit-arm-1769/thttpd:  Add a THTTPD configuration for the
	  KBIT-ARM-1769 board.  From Rashid.
	* 2013-02-27: All configurations for the Cortex-M0 NuTINY-SDK-NUC120
	  appear to be functional and stable.
	* configs/zkit-arm-1769/nsh:  Add an NSH configuration for the
	  KBIT-ARM-1769 board.  From Rashid.
	* arch/arm/src/stm32/stm32_otgfsdev.c:  Fixes from Petterri Aimonen
	  related to corner cases that can cause infinite interrupts.
	* drivers/usbdev/usbmsc_scsi.c:  Change to allow the full name in the
	  USB descriptor but a truncated, 8-byte name in the SCSI field.
	  From Petteri Aimonen.
	* arch/arm/src/stm32/stm32_spi.c: Need to clear error flags to prevent
	  corruption of subsequent transfers.  Also, bit count should not be
	  changed while the SPI peripheral is enabled.  From Petteri Aimonen.
	* drivers/mmcsd/mmcsd_spi.c:  When bus is shared, the speed has to be
	  set every time.  Also SD cards require a few dummy clocks to react
	  into CS release.  From Petteri Aimonen.
	* configs/lm4f120-launchpad: In initial configuration for testing
	  the LM4F120 LaunchPad port.  This is to support testing only and
	  is not yet a functional board port (as of 2013-03-01).
	* arch/arm/include/lm/lm4f_irq.h and arch/arm/src/lm/chip/lm4f_vector.h:
	  Add interrupt vector/IRQ number definitions for the LM4F120.
	* arch/arm/src/stm32f20xxx_dma.c and stm32f40xxx_dma.c:  Fix a typo
	  in assigned base register addresses for each DMA channel.  From
	  Yan T.
	* Several build fixes from Mike Smith were incorporated.  These were
	  mostly compilation errors introduced into the system because of the
	  large number of recent changes with broad scope (2013-03-04).
	* configs/zkit-arm-17969/src/up_can.c:  Add CAN support to the
	  Zilogics Technologies ZKIT-ARM-1769 board (From Rashid Fatah, (2013-03-04)).
	* arch/arm/src/lpc17/lpc17*_clockconfig.c:  The WaveShare Open1788
	  board now boots and passes the OS test.  This is the work of
	  Rommel Marcelo (2013-03-04).
	* arch/arm/src/lm/lm_gpio.c, lm_gpio.h, and chip/lm4f_pinconfig.h
	  Extend GPIO logic to handle LM4F.  Add LM4F pin configuration header
	  file (2013-03-04).
	* configs/open1788:  Enable LED support in all configurations.
	  (2013-03-04)
	* configs/open1788/nsh:  NSH configuration verified function.  By Rommel
	  Marcelo (2013-03-05).
	* configs/open1788/src/lpc17_nsh.c:  Use the SD card interface, not SPI
	  to interface with SD cards (2013-03-05.
	* arch/arm/src/lpc17xx/lpc17_sdcard.c and header files:  Clone the STM32
	  SD card interface to the LPC1788.  It appears to be the same IP.
	  (2013-03-05)
	* libc/wqueue:  Work queue logic moved from sched/ to libc/wqueue.  It
	  is not really core OS functionality and this move helps prepare for
	  user-space work queues. (2013-03-05)
	* libc/wqueue:  Implemented user-space work queues.  These will not
	  get tested until the next time I attempt a NuttX kernel build.
	  (2013-03-05).
	* arch/arm: Correct some bad syscall dispatching logic.  This change
	  cannot be fully tested until there is a fielded NuttX kernel build.
	  (2013-03-06).
	* net/net_poll.c:  Correct logic that checks if the socket is
	  disconnected when the poll is setup.  That is bad logic:  Listen
	  sockets, for example, are not connected.  In that case, the purpose of
	  the poll is to wait for connection events.  As a result of this,
	  poll/select would return immediately with POLLHUP with it was used to
	  detect connection events.  This fix for now was to check instead if
	  the socket is closed (meaning that it was connected at one time but
	  was closed by the remote peer).  That excludes the listen socket which
	  was never connected.  This does introduce a new problem, however.  If
	  the socket was not closed, but lost the connection through an abnormal
	  event, then poll/select will hang.  That needs to be revisited.
	  (2013-03-07)
	* fs/fs_select.c:  Was not checking if the timeout parameter was NULL
	  but would, instead, setup a bogus timeout based on whatever it found at
	  address zero.  Also, improved some of the memory allocation logic so
	  that it will not use so much memory. (2013-03-07)
	* net/net_poll.c:  Handle the missing case.  Now tests for not connected
	  AND not listening.  I think that now covers all of the cases including
	  the missing case noted above. (2013-03-07)
	* mm/:  Move all memory manager globals into a structure.  A reference
	  to this structure is now passed internally between mm APIs. This
	  change will (eventually) support multiple heaps and heap allocators.
	  (2013-03-08).
	* mm/ and include/nuttx/mm.h:  Implement support for multiple heaps.
	  (2013-03-08).
	* arch/*/src: xyz_addregion() needs to call kmm_addregion, not mm_addregion.
	  (2013-03-08).
	* sched/kmm*.c:  Move this garbage kmm*.c file to mm/. until I decide what
	  to do with them (which is probably to just delete them). (2013-03-08).
	* mm/mm_test.c and Makefile.test:  Deleted the memory test.  This was
	  a good test and helped me a lot when I wrote the memory manager, but
	  now it is in the way and paralyzing other efforts.  So the memory unit
	  test was deleted. (2013-03-08)
	* sched/sched_free.c:  Rename sched_free() to sched_ufree(); Add
	  sched_kfree() to handler deferred kernel heap allocations. (2013-03-10)
	* arch/:  User user-accessible heap to allocate all stacks. (2013-03-10)
	* arch/arm/src/sam3u:  The AT91SAM3U will now support a kernel heap if
	  so configured. (2013-03-10)
	* configs/sam3u-ek/knsh:  This configuration was converted to use the
	  kconfigs-frontends build tool. (2013-03-10)
	* configs/*/include/user_map.h and include/nuttx/userspace.h:  Remove
	  the very kludgy user_map.h file and replace it with a header that
	  is expected at the beginning of the user-space blob. (2013-03-10)
	* configs/sam3u-ek/kernel/up_userspace.c:  This is the header for
	  the SAM3U-EK's user space.  (2013-03-10)
	* sched/os_bringup.c:  In the kernel build, os_bringup() now uses the
	  user-space header to automatically start the user-space work queue,
	  if so configured. (2013-03-10)
	* arch/arm/src/lpc17xx/lpc17_mpuinit.c and lpc17_userpace.c:  Add
	  support for the MPU and kernel build for the LPC17xx family.
	  (2013-03-11)
	* configs/open1788/kernel and knsh:  Add kernel build support and
	  a kernel NSH configuration for the WaveShare Open1788 board.
	  (2013-03-11)
	* configs/sam3u_ek/kernel, knsh, and scripts:  Move some files around
	  for better supportability. (2013-03-11)
	* configs/open1788/kernel, knsh, and scripts:  Add a kernel mode build
	  configuration for the WaveShare Open1788 board. (2013-03-11)
	* arch/arm/src/armv7-m/up_mpu.c:  Several fixes to MPU logic.
	  (2013-03-12).
	* arch/arm, configs/sam3u-ek, configs/open1788:  Fix memory map for
	  kernel mode build; Some regions were overlapping. (2013-03-13).
	* arch/:  Rename g_heapbase to g_idle_topstack.  This is the same value
	  however:  The top of the IDLE stack is the same as the base of the
	  heap in the flat build.  But not in the kernel build:  The base of
	  the heap is elsewhere so the naming was wrong. (2013-03-13).
	* libc/stdlib/lib_itoa.c:  Implementation of itoa() contributed by
	  Ryan Sundberg. (2013-03-14).

6.27 2013-04-28 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/armv7-m/up_mpu.c:  Correct MPU sub-region settings for
	  unaligned regions (2013-03-15).
	* arch/arm/src/armv6-m/up_svcall.c:  Bring up to equivalent to the
	  ARMv7-M version (2013-03-15).
	* configs/lm4f120-launchpad/tools:  Add scripts and instructions to
	  simplify use of OpenOCD with ICDI (from JP Carballo, 2013-03-15).
	* tools/mkconfig.c:  Logic that attempts to suppress buffered I/O
	  within the kernel is wrong.  sizeof(struct file_struct) must be
	  the same in both kernel- and user-spaces (2013-03-16).
	* arch/arm/src/common/up_pthread_start.c, libc/pthread/pthread_startup.c,
	  and related files:  Implement switch to user-space and user-space
	  pthread start-up function (2013-03-16).
	* arch/arm/src/common/up_signal_handler.c, libc/pthread/pthread_startup.c,
	  and related files:  Implement switch to user-space and user-space
	  pthread start-up function (2013-03-16).
	* arch/arm/src/common/up_signal_handler.c, libc/signal/signal_handler.c,
	  arch/arm/src/armv[6|7]-m/up_svcall.c, arch/arm/include/armv[6|7]-m/svcall.h,
	  include/nuttx/userspace.h, and sched/sig_deliver.c:  Implement switch
	  to user-space from kernel signal delivery trampoline before calling user-
	  space signal handler.  Return from user-space signal handler using a
	  system call (2013-03-16).
	* arch/arm/src/armv[6|7]-m/up_schedulesigaction.c: Need make sure we are
	  in kernel mode before switching to kernel-mode signal handler
	  trampoline (2013-03-16).
	* arch/arm/include/armv[6|7]-m/irq.h, and arch/arm/src/armv[6|7]-m/up_svcall.c:
	  Add support for nested system calls.  In the current design, this can
	  happen only under one condition:  When the kernel system call logic calls
	  back into user space in order to allocate user space memory.  So it is
	  expected that the maximum nesting level will be only 2 (2013-03-17).
	* libc/stdio/lib_sccanf.c:  Correct an error in sscanf.  If %n occurs in
	  the format statement after the input data stream has been fully
	  parsed, the %n format specifier will not be handled.  Reported by
	  Lorenz Meier (and also earlier by Kate) (2013-03-17).
	* drivers/serial/serial.c:  Support for O_NONBLOCK was not supported
	  in the "upper half" serial driver.  This is normally not an issue
	  because UART TX is almost always available, but it does become an
	  if the UART uses hardware flow control or if the a "lower half" is
	  something like the USB CDC/ACM driver that may need to block for
	  significant amounts of time (2013-03-18).
	* arch/arm/src/armv7-h/ram_vectors.h, up_ramvec_*.c, arch/arm/src/*/*_irq.c,
	  and Make.defs:  Add support for modifiable interrupt vectors in RAM
	  (2013-03-18).
	* arch/arm/src/armv7-m/up_exception.S, sam3u/sam3u_vectors.S, and
	  lpc17xx/lpc17_vectors.S: In exception handling with CONFIG_NUTTX_KERNEL,
	  need to explicity set and clear the privilege bit in the CONTROL
	  register on return.  I assumed this would be handled automatically
	  by the EXC_RETURN.  Silly me (2013-03-18).
	* arch/arm/src/lpc17_adc.c:  Add a work-around for an ADC errata.  From
	  Chris Taglia (2013-3-19).
	* arch/arm/src/armv7-m/up_hardfault.c:  If the PRIMASK is used to disable
	  interrupts, then additional logic is required in the hard fault handler
	  (2013-3-19).
	* libc/ and mm/: Directories where the same sources files are used to
	  build different objects in the first and second pass kernel builds need
	  to keep those objects in separate directories so that they are not
	  constantly rebuilt (2013-3-19).
	* fs/fat:  Create an error in FAT file creation.  The FAT logic was
	  not making a distinction between directory non-existence and file
	  non-existence so when it you try to create a file in a non-existent
	  directory, it would create a file with the name of the missing
	  directory.  Reported by Andrew Tridgell (2013-03-30).
	* Numerous files:  Changed the protoypes of up_create_stack() and
	  up_release_stack() so that is includes a task type.  Normally you
	  can get this type from the TCB parameter, but there are certain
	  conditions when the task type is not valid in the TCB when these
	  functions are called.  Only the prototypes were changed on this
	  big, initial checkin.  The next step will be to add logic to
	  allocate stacks for kernel threads from protected kernel memory
	  and all other task types from unprotected user memory (2013-03-20).
	* arch/*/src/common/up_createstack.c, up_use_stack.c, and
	  up_release_stack.c:  If creating or releasing the stack for a kernel
	  thread, use the kernel allocator so that the kernel thread stacks
	  are protected from user application meddling (2013-03-20).
	* arch/arm/src/armv[6|7]-m/up_scall.c:  Fix parameter passing for
	  all system call inline functions with > 3 parameters (2013-03-20)
	* arch/*/src/common/up_stackframe.c and include/nuttx/arch.h:  Add
	  and new interface to set aside memory on the stack.  This will be
	  used at least in the kernel build to hold task arguments (2013-03-21).
	* sched/sig_deliver.c:  When dispatching signals to user threads,
	  copy the siginfo_t from the sigq to the stack.  The signal queue
	  is allocated from kernel memory; however, the current stack is
	  the user's stack and the user code will be able to access the
	  signinfo_t data from the stack copy (2013-03-21).
	* arch/arm/src/stm32:  Added support for the kernel mode build
	  (cloned from the lpc17xx).  (2013-03-21).
	* configs/stme32f4discovery/kernel and scripts:  Add support for
	  the kernel mode build on the STM32F4Discovery  (2013-03-21).
	* drivers/st7567.c/h and include/nuttx/lcd/st7567.h:  Driver for
	  the ST7567 LCD Display Module from Univision Technology Inc.
	  contributed by Manikandan.S (2013-03-22).
	* configs/zkit-arm-1769:  Now supports the ST7567 LCD display
	  module.  Added an nxhello configuration for testing (Manikandan.S,
	  2013-03-22).
	* configs/stm32f4discovery/kostest:  Add a kernel mode version
	  of the OS test for the STM32F4Discovery board (2013-03-22).
	* nuttx/include/nuttx,  nuttx/configs/sam3u-ek, nuttx/configs/open1788,
	  nuttx/configs/stm32f4discovery, and nuttx/arch/arm:  Complete
	  re-archtecting of how signals are dispatched to user-space code
	  in the kernel build.  The original implementation was C-based
	  and simpler.  However, the C code intermixed with SVC calls was
	  not properly preserving registers.  The more complex, assembly
	  language version does not suffer from these issues.  I believe
	  the kernel build can now be called "feature complete"
	  (2013-03-23).
	* binfmt/binfmt_execmodule.c:  Here is a place where I forget
	  to update the call to sched_releasetcb() to pass the thread
	  type as the second parameter (2013-03-23).
	* arch/arm/src/lm, kinetis, lpc43, and nuc1xx:  Add kernel build
	  support to all ARMv7-M and ARMv6-M chips.  There are no
	  configurations in place to to verify these additions!
	  (2013-03-24).
	* arch/arm/src/lm/lm_gpio.h:  Correct typos in alternate function
	  definitions (2013-03-24).
	* arch/arm/src/lm/lm_lowputc.c and lm_serial.c:  Add support for
	  the 7 UARTs on the LM4F120 (2013-03-24).
	* configs/lm4f120-launchpad/ostest/defconfig:  Fix the configured
	  RAM size.  This appears to be the last show-stopper bug:  The
	  LaunchPad now runs NuttX!  (2013-03-24).
	* configs/lm4f120-launchpad/nsh:  Add an NSH configuration for the
	  LaunchPad (2013-03-24).
	* configs/kwikstik-k40:  Converted configurations to use the
	  konfig-frontends tool (2013-03-25).
	* configs/twr-k60n512:  Converted configurations to use the
	  konfig-frontends tool (2013-03-25).
	* arch/arm/src/lpc17xx/lpc17_lcd.c:  Add an LCD framebuffer driver
	  for the LPC177x/8x family (2013-3-26).
	* arch/arm/src/lpc17xx/lpc17_emc.c and
	  configs/open1788/src/lpc17_sdraminitialize.c:  Began testing the
	  Open1788 SDRAM.  The SDRAM is basically functional, but there are
	  failures with the SDRAM is stressed by the memory test at
	  apps/example/ramtest (SDRAM support and the RAM test can be configured
	  into the base configs/open1788/nsh configuration as described in
	  configs/open1788/READMT.txt (2013-3-27).
	* configs/open1788/nxlines:  Add a configuration to test both the
	  Open1788 LCD and SDRAM which is used as a framebuffer (2013-3-27).
	* arch/arm/src/lpc17xx/lpc17_gdma.c and lpc17_sdcard.c:  Began
	  implementation of the LPC17 DMA and integration into the SDCARD
	  driver (2013-3-29).
	* arch/arm/src/lpc17xx/lpc17_gdma.c: LPC17 DMA is code complete and
	  under test.  Does not yet work (2013-3-30).
	* fs/fat/fs_fat32dirent.c and fs_fat32util.c:  Several fixes to the
	  FAT file system from Ronen Vainish.  These fixes mostly involve the
	  logic to extend directory clusters for the case of long file names
	  but also include a few important general fixes (such as for storing
	  32 bit FAT values) (2013-03-31).
	* arch/arm/src/lpc17xx/lpc17_gdma.c and lpc17_sdcard.c:  SD card DMA
	  is now functional.  Thre may be some issues with DMA from CPU SRAM
	  which is apparently disabled in sleep mode; up_idle() always enters
	  sleep mode (2013-03-31).
	* arch/arm/src/stm32:  Add architecure support for the STM32 F427/F437
	  chips. Contributed by Mike Smith (2013-4-01).
	* configs/zkit-arm-1769/src/up_can.c:  Add support for both CAN1
	  and CAN2.  Contributed by M.Kannan (2013-4-01).
	* arch/arm/src/lpc17xx/lpc17_spi.c and lpc17_ssp.c and
	  configs/olimex-lpc1766stk, nucleus2g, zkit-arm-1769, and
	  lpcxpresso-lpc1768:  The initialization function for both the LPC17xx
	  SPI and SSP blocks was called up_spinitialize() which is the common API
	  definition of include/nuttx/spi.h.  But this raises a problem when the
	  MCU has multiple blocks for differ SPI implementations as does the
	  LPC17xx (and also as does other architectures like STM32 that have
	  USARTs that can serve as SPI interfaces as well).  These were renamed
	  to lpc17_spiinitialize() and lpc17_sspinitialize() in this case.
	  Problem reported by M. Kannan (2013-4-01).
	* arch/arm/src/lpc17xx/lpc17_gpdma.c and lpc17_idle.c:  In sleep mode,
	  DMA can only be performed from peripheral SRAM.  CPU SRAM is shutdown
	  in sleep mode.  In order to simplify DMA memory allocation, the LPC17xx
	  IDLE will now hold off going to sleep mode if there is a DMA in progress
	 (2013-4-01).
	* configs/open1788/src/lpc17_autoleds.c:  Reversed sense of the IDLE LCD.
	  It is now off when the LPC17 is sleeping and on when awake.  That is
	  much more useful because it provides a good visual indication of the
	  dynamic CPU load (2013-4-01).
	* configs/open1788/src/lpc17_touchscreen.c and lpc17_ssp.c:  Add
	  support for the touschscreen on the WaveShare LCD (2013-4-01).
	* configs/several:  There were already some functions called
	  lpc17_sspinitialize().  So they had to be renamed (2013-4-01).
	* arch/arm/src/lpc17xx/lpc17_ssp.c:  Adapted to work with the LPC178x
	  family (2013-4-01).
	* arch/arm/src/lpc17xx/lpc17_gpio.c/.h:  Separate LPC176x and LPC178x
	  logic into separate files.  The logic is diverging to much to
	  try to retain common code (2013-4-03).
	* net/net_clone.c:  Fix compilation error when socket options are
	  are disabled. Reported by Daniel O'Connor (2013-4-05).
	* configs/zkit-arm-1769/src/up_leds.c:  Fix a typo introduced into
	  the button interrupt logic (2013-4-05).
	* arch/arm/src/lpc17xx/lpc178x_gpio.c:  Re-design of the GPIO
	  logic for the LPC178x family by Rommel Marcelo (2013-4-05).
	* arch/arm/src/lpc17_gpiodbg.c:  Updated so that it correctly
	  reports LPC177x/8x GPIO registers when GPIO debug is enabled
	  (2013-4-05).
	* arch/arm/src/Makefile:  The variable NUTTX already includes
	  the extension $(EXEEXT).  So remove the second extension
	  $(NUTTX)$(EXEEXT) in two places (2013-4-7).
	* arch/arm/src/lpc17xx/lpc17_gpioint.c:  Disable interrupts in
	  lpc17_setintedge().  This logic must be atomic because it can be
	  re-entered before it completes enabled interrupts, sometimes
	  leaving the interrupts in a strange state (2013-4-7).
	* arch/arm/src/lpc17_lcd.c:  Rommel Marcelo got the LPC1788
	  framebuffer-based LCD working.  Very nice! (2013-4-08).
	* arch/arm/src/lm/lm_clockconfig.c and configs/lm4f120-launchpad:
	  Fix handling of the RCC SYSDIV2 field when the PLL output is
	  400MHz.  Don't forget to set the USERCC2 bit in the register or
	  all is for naught (2013-4-09).
	* configs/zkit-arm-1769/src/up_lcd.c, up_ssp.c, and up_spi.c:
	  Use SSP0 to LCD and SPI to SD-Card on the Zkit-arm-1769 board.
	  From Manikandan. S (2013-4-10)
	* configs/olimex-lpc1766stk/usbserial:  Converted to use the
	  kconfig-config frontends tools (2013-4-12).
	* drivers/usbdev/pl2303.c: Fix some compilation errors that
	  crept in when fixes to the CDC/ACM driver where blindly
	  incorporated in the PL2303 driver (2013-4-12).
	* configs/stm3210e-eval/usbserial:  Converted to use the
	  kconfig-config frontends tools (2013-4-12).
	* configs/nucleus2g/usbserial:  Converted to use the
	  kconfig-config frontends tools (2013-4-12).
	* arch/arm/src/kl and arch/arm/include/kl:  Add support for the
	  Kinetis L family of Cortex-M0+ MCUs.  Contributed by Alan
	  Carvalho de Assis.  NOTE:  This is still very much a work in
	  progress as of this initial commit (2013-04-16).
	* configs/freedom-kl25z:  Support for the Freedom KL25Z board
	  contributed by Alan Carvalho de Assis.  NOTE:  This is still
	  very much a work inprogress as of this initial commit
	  (2013-04-16).
	* arm/arm/src/armv6-m and arch/arm/include/armv6-m:  Ooops.  Fix
	  a major screw-up:  The Cortex-M0 has no BASEPRI register but
	  the current logic was using it to manage interrupts.  Switch
	  to using the PRIMASK.  This means that hardfaults will (again)
	  occur when SVC instructions are executed (2013-4-16).
	* configs/stm3240g-eval/ostest:  Converted to use the kconfig-frontends
	  tools (2013-4-17).
	* sched/task_exithook.c:  Don't flush the streams until the
	  final thread of the group exits.  Flushing may cause the
	  thread to get suspended at a bad time and other threads in the
	  group may run while the exiting thread is in an unhealthy state.
	  This can cause crashes under certain circumstance.  This is a
	  critical bugfix (2013-4-18).
	* drivers/mtd/ramtron.c:  Extended to support the FM25V01 device.
	  Contributed by Lorenz Meier (2013-4-18).
	* sched/task_deletecurrent.c and task_exit.c, arch/*/up_exit.c:
	  Renamed task_deletecurrent() and task_exit() since it really
	  handles the architecture independent part of _exit().  _exit()
	  is used internally, but if it is called from the user, it should
	  unregister any atexit() or on_exit() functions (2013-4-18).
	* tools/kconfig2html.c: This is the beginning of a tool to
	  replace the hand-generated documentation of the NuttX configuration
	  variables with auto-generated documentation.  The initial checkin
	  is an incomplete, poorly structured prototype that I hope to
	  evolve into a useful tool (2014-4-20).
	* libc/string/lib_strchr.c:  strchr(str, '\0') should return a
	  pointer to the end of the string, not NULL.  From Petteri
	  Aimonen (2014-4-22).
	* fs/fat/fs_writefat.c: mkfatfs was writing the boot code to the
	  wrong location.  From Petteri Aimonen (2014-4-22).
	* Documentation:  The NuttX documentation now expects to find an
	  auto-generated version of the configuration variable documentation
	  at Documentation/NuttXConfigVariables.html (2014-4-22).
	* arch/arm/src/lpc17xx/lpc17_adc.c:  Only one ADC pin was configured.
	  Need to configure all that are in the ADC0 set.  From MKannan
	  (2014-4-23).
	* configs/zkit-arm-1769/src:  ADC and SPI/USB MSC updates from
	  MKannan (2014-4-23).
	* arm/src/armv7-m/ram_vectors.h and arm/src/armv7-m/up_ramvec_initialize.c:
	  Fixes to RAM vector logic from Paul Y. Zhang (2014-4-23)
	* tools/kconfig2html.c:  Improve behavior of Expand/Collapse
	  Table of Contents; Handle errors in parsing of strings and in
	  some uninitialized variables.  Add an option to use jQuery.
	* tools/mkconfigvar.sh: Fix make target (2014-4-23).
	* sched/exit.c, pthread_exit.c, task_exit.c, task_delete,c and
	  task_exithook.c:  For pthread_exit(), move some logic to an early
	  point in the exit sequence where the task may need to block.  Add
	  conditional logic in the lower end of the eixt logic kicked off by
	  _exit() to prohibit blocking after the task has been torn down and is
	  no longer cabable of blocking (2014-4-23).
	* arch/arm/src/common/up_initialize.c: Add missing registration
	  of /dev/zero.  Registration of /dev/null should depend upon
	  conditional compilation.  From Ken Pettit (2014-4-24).
	* arch/*/src/common/up_initialize.c:  Same change required to other
	  architectures (2014-4-24).
	* arch/arm/src/kl/kl_clockconfig.c and configs/freedom-kl25z/include/board.h:
	  Modify out PLL configuration so that it uses the values in
	  board.h;  Fix PLL settings in board.h so that the correct core
	  and bus clock frequencies are generated. (2014-4-24).
	* arm/src/kl/chip/kl_memorymap.h, kl_sim.h, andkl_uart.h:  Correct some
	  register definitions (2014-4-25).
	* arch/arm/src/kl/Kconfig, kl_lowputc.c, kl_serial.c, and kl_config.h:
	  No UART3-5 (2014-4-25).
	* arch/arm/src/kl/kl_serial.c:  Various fixes to various files in the
	  KL architecture directory as need to get the interrupt-driven
	  serial driver to work.  The Freedom KL25Z NSH configuration now
	  works (2014-4-25).
	* include/nuttx/assert.h, arch/*/src/*/up_assert.c, and other file:
	  Remove up_assert_code().  While asserting with an encoded value
	  could be a good feature, the codes have not be well utilized nor
	  documented.  Give that situation it is better to remove the API
	  and reduce the footprint a little (2014-4-25).
	* drivers/serial/Kconfig and arch/*/src/*/*_serial.c:  Add
	  compilation so that the useless TIOCSERGSTRUCT ioctl logic
	  is not build unless CONFIG_DEBUG and CONFIG_SERIAL_TIOCSERGSTRUCT
	  are defined.
	* sched/task_delete.c and task_terminate.c:  Most task_terminate()
	  out of task_delete.c into its own C file.  This should prevent
	  dragging task_delete() into the link when it is never called.

6.28 2013-06-14 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/lpc17xx/lpc17_i2c.c:  Interrupts were not being
	  re-enabled in the I2C initializeation function (2013-4-30).
	* net/sendto.c:  Added skeleton of implementation of send timeouts
	  for UDP.  However, this functionality really does not make
	  sense, so it is disabled in the code (2013-4-30).
	* drivers/mtd/mtd_partition.c:  Support capability to clone one
	  MTD driver into several, MTD partition drivers, each of which
	  can manage a sub-region of the FLASH (2013-4-30).
	* configs/sim/nxffs:  Converted to use the kconfig-frontends
	  tools (20130-4-30).
	* configs/sim/mtdpart:  A new configuration to test MTD
	  partitions (2013-4-30).
	* configs/sim/mkroe-stm32f4:  Support for the MikroElektronika
	  Mikromedia for STM32F4 development board (from Ken Pettit, 2013-4-30).
	* fs/smartfs:  Add Ken Pettit SMART FS (2013-4-30).
	* include/nuttx/mtd.h and most MTD drivers:  Add support for
	  (optional) method to perform byte oriented writes if so configured
	  (2013-5-1).
	* arch/arm/src/kl/chip/kl25z128_pinmux.h:  Corrections fo the
	  pin multiplexing definitions from Alan Carvalho de Assis
	  (2013-5-2).
	* drivers/mtd/mtd_partition.c:  Fix a few bugs and add support for the
	  (option) byte write method (2013-5-3).
	* arch/arm/src/kl:  Repartitioning of definitions in header files
	  from Alan Carvalho de Assis (2013-5-3).
	* drivers/mtd/smart.c, fs/smart, and other files:  SMART file system
	  now makes use of the MTD byte write capabilities when present (from
	  Ken Pettit, 2013-5-3).
	* drivers/mtd/m25px.c:  Some rearchitecting to use the byte write
	  capability (when possible) and to use 4KB sectors for the erase block
	  size when the part supports it (Ken Pettit, 2013-5-3).
	* configs/pirelli_dpl10: Adds a configuration for the pirelli phone
	  (from Craig Comstock via Alan Alan Carvalho de Assis, 2013-5-3).
	* arch/arm/src/calypso:  Fix some compilation warnings (2013-5-5).
	* configs/pirelli_dpl10/nsh_highram:  Converted to use the
	  kconfig-frontends tools (2013-5-5).
	* drivers/lcd/mio283qt2.c:  LCD was not being selected in setpower
	  method (also not being deselected in hwinitialize function)
	  (2013-5-6).
	* arch/arm/src/kl/kl_gpio.c and .h, configs/freedom-kl25z/src/freedom-kl25z.h,
	  and configs/freedom-kl25z/src/kl_led.c:  Fixes LEDs on the Freedom KL25Z
	  board (2013-5-6).
	* arch/arm/src/kinetis/kinetis_pin.c and arch/arm/src/kinetis/kinetis.h:
	  The Kinetis GPIO logic had some of the same issues as did the
	  Kinetis L (2013-5-6).
	* arch/arm/src/stm32/stm32_idle.c: Add an option to conditionally disable
	  the "wfi" sleep mode.  This is needed with certain JTAG debuggers to
	  to prevent the debug session from begin disconnected.  From Ken Pettit
	  (2013-5-7).
	* configs/mikroe-stm32f4/fulldemo/, nx/, nxlines/, nxtext/:  Add more
	  configurations for the Mikroelektronika Multimedia STM32-M4 board.
	  From Ken Pettit (2013-5-7).
	* configs/mikroe-stm32f4/src/up_mio283qt2.c and other files:  Integrate the
	  MIO283QT2 display on the Mikroelektronika Multimedia STM32-M4 board.
	  From Ken Pettit (2013-5-7).
	* arch/arm/src/lpc17xx/lpc17_i2c.c:  Fix for lpc17xx i2c single byte read
	  timeout error problem from M.Kannan (2013-5-8).
	* arch/arm/src/stm32/stm32_adc.c:  Typo in F2/F4 specific logic:  ACD_
	  instead of ADC_.  From Ken Pettit (2014-5-8).
	* configs/olimex-lpc1766stk/tools:  Tweaks to support OpenOCD-0.70
	  (2013-5-10).
	* configs/mikroe-stm32f4:  Changes to get the Mikroelektronika MultiMedia
	  STM32 F4 touchsceen working.  From Ken Pettit (2013-5-11).
	* configs/*/nxwm:  Default priorities for NxWidget and NxWM threads
	  should be 100, not 50, to be consistent with other default priorities.
	* configs/hymini-stm32v/buttons, nsh, and nsh2:  Configurations converted
	  to use the kconfig-frontends tools (Laurent Latil, 2013-5-14)
	* configs/hymini-stm32v/src:  Converted to use the common SSD1289 driver
	  (Laurent Latil, 2013-5-14)
	* configs/hymini-stm32v/ostest and usbnsh:  Add OS test and USB/NSH
	  configurations (Laurent Latil, 2013-5-14).
	* configs/hymini-stm32v/src/up_nsh.c:  Add support for the card detect
	  (CD) interrupt (Laurent Latil, 2013-5-14).
	* configs/hymini-stm32v/src/nx and nxlines:  Removed these configurations
	  (Laurent Latil, 2013-5-14).
	* arch/arm/src/stm32/chip/stm32f10xx_dma.h:  Fix some bad DMA register
	  definitions.  From Laurent Latil (2013-5-15).
	* configs/hymini-stm32v:  Enable SDIO in nsh2 configuration; remove
	  warning from src/up_ssd1289.c.  From Laurent Latil (2013-5-15).
	* configs/hymini-stm32v/src/up_r61505u.c:   Support for the R65105-
	  based LCD that comes with some HY-Mini STM32v board.  From Christian
	  Faure (2013-5-16).
	* syscall/syscall_lookup.h:  Missing underscore character in SYS_onexit.
	  Reported by Ken Pettit (2013-5-17).
	* nuttx/syscall/syscall.csv:  Type of first parameter of on_exit() is
	  wrong. Reported by Ken Pettit (2013-5-17).
	* configs/mikroe-stm32f4/kernel/, kostest/ and scripts/:  Add kernel build
	  support and kernel mode OS test example for the MikroElektronkia
	  MultiMedia STM32 M4 board.  From Ken Pettit (2013-5-17).
	* arch/arm/include/stm32/chip.h and arch/arm/src/stme32/chip/stm32l15xxx_pinmap.h:
	  Beginning of support for the STM32L15X family (2013-5-18).
	* arch/arm/include/stm32/stm32l15xxx_irq.h and arch/arm/src/stm32/chip/stm32l15xxx_vectors.h:
	  Support for STM32L15X interrupt vectors (2013-5-18).
	* arch/arm/src/stm32/chip/stm32l15xxx_gpio.h and related STM32 GPIO files:
	  Add GPIO support for the STM32L215X (2013-5-18).
	* arch/arm/src/stm32/chip/stm32l15xxx_memorymap.h: STM32L215X memory map
	 (2013-5-18).
	* arch/arm/src/stm32/chip/stm32_pwr.h, stm32fl15xxx_rcc.h, and stm32l15xxx_syscfg.h:
	  More updates for the STM32L152 (2013-5-19).
	* configs/stm32ldiscovey: Configuration for the STM32L-Discovery board.
	  Still does not build on initial check-in (2013-5-19)
	* STM32L15X:  Add DMA and UART start.  Correctly initialize the heap
	  (2013-5-19).
	* arch/arm/src/stm32/stm32l15xxx_rcc.c chip/stm32_flash.h:  Add RCC PLL
	  and FLASH configuration logic for the STM32L152X (2013-5-19).
	* include/nuttx/usb/audio.h:  Typo- and bug-fixes from Ken Pettit
	  (2013-5-19)
	* audio/, drivers/audio, include/nuttx/audio.h:  Add a new audio subsystem
	  and VS1053 driver to NuttX.  Contributed by Ken Pettit (2013-5-19).
	* configs/miroe-stm32f4/:  Add audio logic to NSH configuration.  From Ken
	  Petty (2013-5-19).
	* nuttx/arch/arm/src/lm/chip/lm_flash.h and nuttx/arch/arm/src/lm/lm_flash.c:
	  Add support for TI/Stellaris internal FLASH MTD driver.  From Max
	  Holtzberg (2013-5-20).
	* arm/src/stm32/chip/stm32l15xxx_vectors.h:  After correcting errors in the
	  vector definition file, the STM32L-Discovery NSH port now seems to be
	  fully functional.  Also fixed an error that was causing the LEDs to be
	  controlled incorrectly (2013-5-21).
	* arch/arm/src/stm32/chip/stm32_lcd.h: Add definitions for STM32L15X
	  segment LCD (2013-5-21).
	* configs/lm3s6965-ek/discover: Add an example configuration for UDP
	  discovery tool on the lm3s6965-ek board.  From Max Holtzberg
	  (2013-5-21).
	* audio/, drivers/audio, include/nuttx/audio:  Added a callback interface
	  to the Audio upperhalf driver for dequeueing, reporting async events,
	  etc. Also included is some initial work for the VS1053 driver.  From
	  Ken Pettit (2013-5-21).
	* include/nuttx/audio/audio.h:  Moved from include/nuttx/ to include/nuttx/audio.
	  (2013-5-21).
	* configs/lm3s6965-ek/tcpecho: This configuration builds the simple TCP
	  echo example based on W.Richard Steven UNIX Programming book to ensure
	  correct usage of the socket API. Contributed by Max Holtzberg (2013-5-22).
	* configs/stm32ldiscovery/src/stm32_lcd.c:  Framework for support of the
	  STM32L-Discovery's segment LCD (2013-5-22).
	* fs/fs_poll.c:  Poll setup/teardown logic should ignore invalid (i.e.,
	  negative) file descriptors.  Max Holtzberg (2013-5-23).
	* net/net_poll.c: When readahead data is available, the network poll
	  logic should set POLLIN (or POLLRDNORM), not POLLOUT.  Max Holtzberg
	  (2013-5-23)
	* fs/fs_poll.c:  Actually, it should also set revents == 0. (2013-5-23).
	* libc/misc/lib_slcdencode.c and lib_slcddecode.c:  Add logic to marshal
	  and serialize special SLCD intermixed with normal ASCII data (2013-5-23)
	* configs/stm32ldiscovery/src/stm32_lcd.c:  STM32L-Discovery's segment LCD
	  is code complete but completely untested (2013-5-23).
	* include/nuttx/fs/ioctl.h, include/nuttx/lcd/slcd_codec.h, and
	  configs/stm32ldiscovery/src/stm32_lcd.c:  Add SLCD ioctl commands to get
	  SLCD geometry, set bars, and manage contrast (2013-5-23).
	* configs/stm32ldiscovery/src/stm32_usb.c:  This file and all references
	  to USB removed for the STM32L-Discovery.  While the chip supports a
	  USB device, the board does not (2013-5-24).
	* arch/arm/src/stm32/stm32_lse.c:  Add support for the STM32L CSR register
	  and for the LSE LCD clock source (2013-5-24).
	* The STM32L-Discovery segment LCD is now functional and the README file
	  includes instructions for adding the apps/examples/slcd segment LCD
	  test as an NSH "built-in" command (2013-5-24).
	* configs/pcblogic-pic32mx:  Converted all configurations to use the
	  kconfig-frontends tool (2013-5-25).
	* configs/pcblogic-pic32mx/src:  Renamed files using pic32mx_ vs up_
	  prefix.  Enable building of LCD1602 LCD (2013-5-25).
	* configs/pcblogic-pic32mx/src/pic32mx_lcd1602.c: Now uses SLCD CODEC
	  (2013-5-25)
	* configs/stm32ldiscovery/src/stm32_lcd.c: Now supports ioctl to get
	  cursor position (2013-5-25).
	* include/nuttx/lcd/slcd_ioctl.h:  Moved ioctls commands and structures
	  from slcd_codec.h (2013-5-25)
	* libc/misc/lib_slcdencode.c and lib_slcddecode.c:  Several encoding
	  and decoding bug fixes (2013-5-26)
	* configs/sure-pic32mx:  Converted all configurations to use the
	  kconfig-frontends tools, cleaned up the directory structure and
	  naming to match some of the more recent configurations, and added
	  a segment LCD driver for the board.  The initial checkin of the
	  LCD driver is just a clone of configs/pcblogic-pic32mx/src/pic32mx_lcd1602
	  and it not yet expected to be functional (2013-5-26).
	* include/nuttx/lcd/slcd_ioctl.h and all SLCD drivers:  Rename geometry
	  structure to attributes;  Move MAX contrast to attributes.  Add
	  attribute and ioctl commands to get and set LCD brightness (2013-5-27).
	* configs/sure-pic32mx/pic32mx_lcd1602.c:  This driver appears to
	  fully functional (at least to the extent that it has been tested)
	  (2013-5-27).
	* arch/mips/src/pic32mx/pic32mx-usbdev.c:  Fix NULL packet handling in
	  the PIC32 USB device driver.  Without this fix the CDC/ACM driver
	  cannot be used reliably with the PIC32 USB.  With this change the
	  configs/sure-pic32mx/usbnsh configuration works great (2013-5-28).
	* configs/sure-pic32mx/src/pic32mx_nsh.c:  The NSH configurations will
	  support the USB monitor applications (2013-5-28).
	 nuttx/arch/arm/include/stm32/chip.h, src/stm32/Kconfig, src/stm32/chip.h,
	  and src/stm32/chip/stm32f103c_pinmap.h: STM32F103C4 and F103C8 chip
	  support from Laurent Latil (2013-5-28)
	* configs/stm32_tiny: Add support for the STM32 Tiny development board
	  based on the STM32 F103C8T6 MCU (2013-5-28).
	* arch/arm/src/stm32/stm32_usbdev.c:  Fix an error in NULL packet
	  handling:  If the NULL-packet needed flag ever gets set, then
	  it is not cleared and inifinite NULL packets result.  This only
	  effects the CDC/ACM class and was the cause of the failure of
	  configs/stm32f3discovery/usbnsh configuration which works great
	  after this change (2013-5-29).
	* drivers/usbdev/cdcacm.c and pl2303.c and include/nuttx/usb/cdcacm.h:
	  Change the default IN request buffer size from 64 to 96.  This will
	  avoid requests of exactly MAXPACKET size and, hence, avoid so many
	  NULL packets.  Also, fix the OUT request buffers size to exactly
	  the max packet size.  It cannot be any other size (2013-5-29).
	* .gitignore:  Clean-up of most all .gitignore files:  Make scope of
	  ignore to be only the current directory; Ignore .dSYM files in
	  directories where .exe's may be build.  Also, in Makefiles,
	  clean .dSYM files in directories where .exe may be built (2013-5-30).
	* drivers/wireless/nrf24101.c/.h and include/nuttx/wireless/nrf24101.h:
	  Add new driver for the wireless nRF24L01+ transceiver.  From Laurent
	  Latil (2013-6-1).
	* drivers/wireless/cc1101:  Move files in the cc1101 up one directory.
	  From Laurent Latil (2013-6-1).
	* configs/stm32_tiny: Fix nRF24L01+ driver integration for the STM32
	  Tiny.  From Laurent Latil (2013-6-01).
	* configs/sam3u-ek:  All remaining configurations changed to use
	  the kconfig-frontends tools (2013-6-2).
	* arch/arm/src/sam3u/chip:  All SAM3U register definition files moved
	  to this subdirectory.  Naming of registers changed from SAM3U_ to
	  just SAM_.  This is in preparation for a SAM4L port (2013-6-2).
	* arch/arm/src/sam3u:  Renamed files to sam_* vs. sam3u_*.
	  Eliminated sam3u_internal.h; instead uses individual header
	  files for each SAM interface block (2013-6-2).
	* arch/arm/src/stm32/stm32f20xxx_rcc.c and stm32f40xxx_rcc.c, and
	  configs/mikroe-stm32f4/src/up_clockconfig.c.  Correct some bad
	  conditional compilation (CONFIG_ missing from setting name).  This
	  affects some STM32 FLASH pre-fetch settings.  From Lorenz Meier
	  (2013-6-2).
	* arch/arm/include/sam34 and arch/arm/src/sam34:  The old sam3u/
	  directories were renamed sam34/ to make room in the namespace for
	  the SAM4L (2013-6-2).
	* libc/stdio/lib_dprintd.c and lib_vdprintf.c:  Add dprintf() and
	  vdprintf() (the latter from Andrew Tridgell, 2013-6-2).
	* sched/sem_holder.c:  Modify assertion that is reported to cause
	  false alarm assertions (2013-6-2).
	* arch/arm/include/sam34/sam4l_irq.h and
	  arch/arm/src/sam34/chip/sam4l_memorymap.h: Add interrupt and memory
	  map definitions for the AT91SAM4L (2013-6-3).
	* arch/arm/src/sam34/chip/sam4l_vectors.h and arm/src/sam34/sam_vectors.S:
	  Add interrupt vector support for the SAM4L family (2013-6-3).
	* arch/include/sam34/chip.h:  Add chip definitions for the SAM4L
	  family (2013-6-3).
	* configs/sam4l-xplained:  A partial configuration that will (eventually)
	  support the SAM4L Xplained Pro developement board (2013-6-3).
	* arch/arm/src/sam34/chip/sam4l_pinmap.h:  Initial cut as SAM4L
	  pin mapping (2013-6-3).
	* arch/arm/src/stm32/stm32*_dma.*:  Add a new interface function,
	  stm32_dmacapable() that can be used to determine if DMA is
	  possible from the specified memory address.  From Petteri Aimonen
	  (2013-6-4).
	* arch/arm/src/stm32/stm32_spi.c:  If CONFIG_STM32_DMACAPABLE is
	  defined, use stm32_dmacapable() to determine if it is possible
	  to perform DMA from the specified address.  This change is
	  important for the STM32 F4 which may have SPI data buffers
	  allocated on the stack in CCM memory which cannot support the
	  DMA.  From Petteri Aimonen (2013-6-4).
	* nuttx/arch/arm/src/sam34/sam4l_gpio.h: Created GPIO driver
	  header file for the SAM4L.  Also renamed the SAM3U header
	  file to sam3u_gpio.h (2013-6-4).
	* nuttx/arch/arm/src/sam34/sam4l_gpio.c: Created GPIO driver for
	  the SAM4L (2013-6-4).
	* nuttx/configs/sam4l-xplained/src/sam_userleds.c:  Added.
	  (2013-6-4).
	* configs/sam4l-xplained/src/sam_userleds.c:  Add application
	  LED interfaces (2013-6-5).
	* arch/arm/src/sam34/sam4l_gpio.c and arch/arm/src/sam34/chip/sam4l_gpio.h:
	  Fix GPIO port address; fix compilation errors (2013-6-5).
	* arch/arm/src/sam34/chip/sam4l_flashcalw.h:  Add header file
	  for SAM4L FLASH and PICOCACHE definitions (2013-6-5).
	* arch/arm/src/sam34/chip/sam4l_pm.h:  Add header file for SAM4L
	  Power Management.  Leveraged from AVR32 (2013-6-5).
	* arch/arm/src/sam34/sarm4l_clockconfig.c:  SAM4L clock configuration
	  logic (leveraged from AVR32).
	* nuttx/arch/arm/src/sam34/sam4l_periphclks.c/h:  Add common
	  logic to enabled/disable SAM4L peripheral clocking (2013-6-5).
	* nuttx/arch/arm/src/sam34/chip/sam4l_bpm.h and sam4l_scif.h:  Add
	  register definitions for the SAM4L BMP and SCIF blocks (2013-6-6).
	* nuttx/arch/arm/src/sam34/sam4l_clockconfig.c:  Now selects an
	  optimal power scaling mode (2013-6-6).
	* nuttx/arch/arm/src/stm32/stm32_serial.c and nuttx/include/termios.h:
	  Change for hardware flow control support for STM32. It also fixes
	  incorrect operation of USART2 and UART5 in current master.  Submitted
	  by Lorenz Meier but includes changes by Mike Smith (2013-6-6).
	* nuttx/arch/arm/src/stm32/stm32_otgfshost.c:  A backward conditional
	  prevent detection of disonnection events.  Reported by Scott (2013-6-6).
	* nuttx/arch/arm/src/sam34/chip/sam4l_bscif.h: Add registers definitions
	  for the SAM4L BSCIF module (2013-6-6).
	* nuttx/arch/arm/src/sam34/sam4l_clockconfig.c and chip/sam4l_wdt.h:
	  Finally finished the SAM4L clock configuration logic; Added a
	  WDT register definition header file (2013-6-8).
	* nuttx/arch/arm/src/sam34/chip/sam4l_usart.h and sam4l_picouart.h:
	  Add UART/USART register definition files for the SAM4L (2013-6-8).
	* arm/src/sam34/chip/sam3u_periphclks.h:  More macros and definitions
	  to generalize peripheral clocking and to hide differences between
	  the SAM3U and the SAM4L (2013-6-8).
	* configs/sam4l-xplained/ostest:  The SAM4L now passed the OS test
	  (2013-6-9).
	* configs/sam4l-xplained/nsh:  Added an NSH configuration for the
	  SAM4L Xplained Pro board (2013-6-9).
	* configs/sam4l-xplained/src/sam_cxxinitialize.c:  Added C++ support
	  to the SAM4L Xplained Pro board configuration (2013-6-9).
	* arm/src/sam34/chip/sam_irq.c:  Extend IRQ support to handle the
	  larger number of NVIC interrupts used by the SAM4L (2013-6-9).
	* arch/arm/src/sam45/chip:  Beginning updates of SAM3U header files
	  to include support for the SAM4S: WDT, SUPC, EEFC, MATRIX, PMC,
	  UARTs, USARTs, HSMCI, SPI (2013-6-10).
	* arch/arm/src/chip/sam4s_memorymap.h, sam4s_irq.h, and sam4s_vectors.h:
	  Add SAM4S memory map and interrupt definitions (2013-6-10)
	* configs/sam4s-xplained:  Add framework for the SAM4S Xplained board.
	  There is not much there on initial checkin (2013-6-10).
	* arch/arm/src/sam34: SAM3S support: GPIO, chip characteristics,
	  peripheral Kconfig (2013-6-11).
	* arch/arm/src/sam34/chip/sam4s_pinmap.h:  Add SAM4S pin configuration
	  definitions (2013-6-11).
	* arch/arm/src/sam34/sam4s_periphclks.h:  Add macros to manage SAM4S
	  peripheral clocks (2013-6-11).
	* configs/sam4s-xplained: Configuration builds error-free (2013-6-11).
	* configs/sam4s-xplained/nsh:  Added an NSH configuration for the
	  SAM4S Xplained board.  Both the OS test and the NSH configurations
	  no execute error-free.  Delay loops calibrated for both the SAM4L
	  and SAM4S boards (2013-6-12).
	* Standardize on CONFIG_NSH_BUILTIN_APPS.  Remove all other variants
	  of the build-as-an-NSH-application configuration settings
	  (2013-6-12).
	* arch/arm/src/sam34/sam_periphclks.h:  A header file that just
	  includes the right header file.  This cleans up the messy logic
	  in all of the C files and puts the mess in one place (2013-6-12).
	* arch/arm/src/arm*/Toolchain.mk, Kconfig (and lots of configuration
	  files):  Add support for a generic Windows EABI toolchain (2013-6-13).

6.29 2013-07-31 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/sam34/chip/sam4l_pinmap.h: Change naming of some pin
	  configurations to match names used with other SAM part (2013-6-15).
	* arch/arm/src/sam34/sam4l_clockconfig.c: Corrected some typos
	  (2013-6-15).
	* configs/sam4l-xplained/src/sam_buttons.c: Eliminate a warning
	  (2013-6-15).
	* configs/sam4l-xplained/src/sam_mmcsd.c, sam_nsh.c, sam_spi.c,
	  sam3u-ek.h, Kconfig, Makefile, sam4l-xplained.h,
	  configs/sam4l-xplained/README.txt, and
	  configs/sam4l-xplained/include/board.h:  Add support for the SPI-
	  based SD card on the I/O1 module (2013-6-15).
	* arch/arm/src/sam34/sam_spi.c:  Re-architect the SAM3/4 SPI driver
	  so that is it compatible with the SPI drivers of other MCUs
	  (2013-6-16).
	* configs/sam3u-ek/src/up_touchscreen.c and configs/sam4l-xplained/src/sam_mmcsd.c:
	  Changed needed because of the above change to the SAM3/4 SPI
	  interface (2013-6-16).
	* drivers/input/ads7843e.c:  Remove the wait for the touchscreen busy
	  bit.  I don't see the busy bit changing on the SAM3U-EK board.  But
	  maybe it is not supposed to.  From my reading of the ADS7843 spec, it
	  would not be appropriate to wait for the BUSY bit to de-asserted
	  anyway (since it is only de-asserted when we read the data)
	  (2013-6-16).
	* configs/sam3u-ek/src/up_touchscreen.c: Fix polarity of the /PENIRQ
	  signal (it is active low) (2013-6-16).
	* configs/sam3u-ek/include/board.h:  The SAM3U-EK board now runs at
	  96MHz.  This might have broken some things? (2013-6-17).
	* drivers/mmcsd/mmcsd-spi.c:  Driver need to make sure that the SPI mode
	  and data width are correct (2013-6-17).
	* arch/arm/src/kinetis/kinetis_tsi.h:  Corrections to the Kinetis
	  (2013-6-18)
	* arch/arm/src/sam34/sam_spi.c:  Fix SPI mode setting.  In the SAM3/4
	  family, the clock phase control (CPHA) is inverted (NPHA) (2013-6-18).
	* arch/arm/src/kl/chip/kl_tsi.h: Freescale KL25Z TSI register
	  definitions from Alan Carvalho de Assis (2013-6-18).
	* configs/freedom-kl25z/src/kl_tsi.c:  Example TSI driver for the
	  Freedom KL25Z board from Alan Carvalho de Assis (2013-6-18).
	* arch/arm/src/sam34/sam_spi.c:  Correct an incorrect pointer test.
	  Was checking if the wrong pointer was NULL (2013-6-18).
	* arch/arm/src/kl/kl_spi.c and chip/kl_spi.h:  Add SPI driver and
	  register definitions for the Freescale KL25Z (2013-6-19).
	* arm/src/sam34/chip/sam4l_lcdca.h:  Register definition file for
	  the SAM4L LCD peripheral (2013-6-19).
	* arm/src/sam34/chip/sam_spi.h:  SPI register definition file updated
	  to include a few differences for the SAM4L (2013-6-19)
	* arm/src/sam34/chip/sam4l_pdca.h: Add SAM4L PDCA register definition
	  file; also renamed sam_dmac.* files to sam3u_dmac.* to identify
	  them as SAM4U/4S only files (2013-6-19).
	* configs/freedom-lk25z/src/kl_spi.c:  Add the framework for
	  controlling SPI-related discrete inputs and outputs.  Taken from
	  work by Alan Carvalho de Assis (2013-6-20).
	* arch/arm/src/kl/kl_dumpgpio.c:  Now compiles (2013-6-20).
	* configs/:  Several defconfig files were changed that had
	  CONFIG_HAVE_CXXINITIALIZE=y.  Because of recent changes to
	  apps/examples, these configurations may need to have
	  CONFIG_EXAMPLES_NSH_CXXINITIALIZE=y so that they behave as they did
	  before, i.e., so that C++ initializers will be called when NSH starts
	  up (2013-6-21).
	* configs/sam4l-xplained/src/sam_slcd.c:  Beginning of a driver for the
	  LED1 segment LCD module.  This driver is incomplete on initial check-
	  in (2013-6-21).
	* drivers/net/enc28j60.c:  Change buffer ordering to work around Errata
	  #5.  From Dave (ziggurat29, 2013-6-22).
	* configs/sam4l-xplained/src/sam_slcd.c:  LED1 segment LCD module is now
	  functional (2013-6-23).
	* drivers/lcd/ssd1306.c and include/nuttx/lcd/ssd1306.h.  Renamed
	  ug-2864hsweg01.c and .h to ssd1306.c and .h.  Extended to support the
	  UG-2832HSWEG04 which is very similar and also based on the SSD1306
	  controller (2013-6-23).
	* configs/sam4l-xplained/src/sam_ug2832hsweg04.c: Add support for the
	  UG-2832HSWEG04 OLED on the SAM4L Xplained Pro's OLED1 module
	  (2013-6-23).
	* include/debug.h:  Added macro DEBUGPANIC for forces crashes when debug
	  is enabled.
	* drivers/lcd/ssd1306.c:  Driver now appears to be function for the
	  UG-2832HSWEG04 in landscape mode (2013-6-24).
	* drivers/lcd/ug-2864ambag01.c and ug-9664hswag01.c:  Add/updated
	  support for reverse portrait mode from lessons learned with the
	  UG-2832HSWEG04.  Untested changes! (2013-6-24).
	* arch/arm/src/stm32/stm32_ccm.c and .h:  Add support for a seperate CCM
	  heap.  This may be useful for segregating allocations for CCM (which
	  cannot be used for DMA) from other allocations (that may be used used
	  for DMA) (2013-6-25).
	* arch/arm/src/sam32/sam3u_gpio.h:  Correct configuration of PIO pins
	  for SAM4S B and C peripherals (2013-6-26)
	* configs/sam4s-xplained/src/sam_sram.c:  Added support for on-board
	  1MB SRAM (2013-6-26).
	* arch/arm/include/sam34/chip.h and sam3x_irq.h:  Add support for
	  SAM3X and SAM3A chips (2013-6-26).
	* arch/arm/src/sam34/chip/sam3x_vectors.h:  Add support for SAM3X/3A
	  interrupt vectors (2013-6-26).
	* arch/arm/src/sam34/sam3x_periphclks.h:  Add peripheral clock
	  controls for the SAM3X/3A (2013-6-26).
	* arch/arm/src/sam34/chip/sam3x_memorymap.h:  Add SAM3X/3A memory map
	  (2013-6-26).
	* arch/arm/src/sam34/chip/sam3x_pinmap.h:  Add SAM3X/3A pin
	  multi-plexing definitions (2013-6-26).
	* arch/arm/src/sam34/sam3x_gpio.h:  Add SAM3X/3A gpio encoding
	  macros.  These differ from the SAM3U only in because of the
	  6 PIOs:  PIOA-PIOF (2013-6-26).
	* configs/arduino-due:  This is an empty directory now with only
	  a README file in it but this directory will eventually hold a port
	  for the Arduino Due (2013-6-26).
	* arch/arm/src/sam34/Kconfig:  Add SAM3X/3A peripherals to the SAM3/4
	  configuration logic (2013-6-26).
	* arch/arm/src and include/ and configs/sam*/:  Large rename of all
	  references to SPI with SPI0.  This is because all other SAMs have
	  only SPI but the 3X/3A have SPI0 and SPI1 (2013-6-26).
	* configs/arduino-due:  Complete the basic board configuration and
	  integrate this into the configuration and build system.  The Arduino
	  Due is now ready to begin test (2013-6-17).
	* configs/arduino-due/nsh:  Add an NSH configuration for the Arduino
	  Due.  Both the OS test and NSH configuration are now functional
	  (2013-6-28).
	* configs/arduino-due/src:  Add support for the "L" LED (2013-6-28).
	* arch/arm/src/sam34/sam_allocateheap.c:  Clocking must be applied
	  to the SMC module for the 3X and 3A family in order for the NFC
	  SRAM to be functional (2013-6-28).
	* arch/arm/src/sam34/sam3u_gpio.c:  Need to disable write
	  protection before configuring PIO pins.
	* configs/sam3u-ek/nsh:  The touchscreen is now functional.  The above
	  fix to the sam3u_gpio.c write protection also fixed the touchscreen
	  problem (2013-6-28).
	* confgis/sam3u_ek/nxwm:  Created a configuration for the NxWM
	  window manager for the SAM3U-EK board (2013-6-29).
	* drivers/spi and include/nuttx/spi:  New sub-directories to hold
	  SPI-related files.  includes/nuttx/spi.h moved to include/nuttx/spi/.;
	  SPI-related Kconfig info moved from drivers/Kconfig to drivers/spi/kconfig
	  (2013-7-1).
	* drivers/spi/spi_bitbang.c and include/nuttx/spi/spi_bitbang.h:  Add
	  support for a generic bit-bang SPI driver.  This checkout is the
	  common upper-half logic.  Still missing the lower half (2013-7-1).
	* include/nuttx/spi/spi_bitbang.c:  This is the common lower-half bit-
	  bang SPI logic (2013-7-1).
	* configs/arduino-due/src/sam_nsh.c and sam_mmcsd.c:  Add NSH customize
	  initialization.  If so configured, initialize the SPI bit bang
	  interface to the MMC/SD slot on the ITEAD shield (2013-7-1).
	* fs/fs_mount.c:  Fix compilation error if no file systems are enabled:
	  Change error to ERROR (2013-7-3).
	* arch/arm/src/sam34/sam_gpioirq.c:  Fix some errors for interrupts
	  on ports D-F (2013-7-3).
	* /drivers/usbdev/composite.c: Fix a typo in the composite device
	  driver unitialization logic.  DEV1 should be DEV2 in one case
	  (2013-7-4).
	* arch/arm/src/sam34/sam3u_gpio.c:  sam_configgpio() must protect
	  against re-entrancy (2013-7-5).
	* libc/misc/lib_crc16.c and include/crc16.h:  Add CRC16 support
	  (2013-7-7).
	* arch/arm/src/stm32/stm32_otgfsdev.c:  SourceForge bug #16:  Fix
	  to the endpoint allocation logic.  Apparently the same endpoint can
	  be allocated as both an IN or an OUT endpoint.  The existing
	  implementation only supported one allocation, either IN or OUT.  This
	  resulted in failures to allocate endpoints when used with the CDC/ACM +
	  MSC composite driver (From Chia Cheng Tsao, 2013-7-8).
	* arch/arm/src/stm32/stm32_sdio.c:  SourceForge bug #17:  Add
	  support for the data block end (DBCKEND) interrupt to terminate
	  transfers (From Chia Cheng Tsao, 2013-7-8)
	* drivers/rwbuffer.c: SourceForge bug #17: Correct typos that can cause
	  failures in some configurations (From Chia Cheng Tsao, 2013-7-8).
	* include/nuttx/usb/usbdev.h: Fix some typos that cause compiler errors
	  when CONFIG_USBDEV_DMA and CONFIG_USBDEV_DMAMEMORY are selected (From
	  Chia Cheng Tsao, 2013-7-12).
	* nuttx/configs/olimex-lpc1766stk/zmodem:  Add a new configuration to
	  test the Zmodem sz and rz commands (which don't actually exist yet,
	  but will). (2013-7-12).
	* arch/arm/include/armv7-a and src/armv7-a:  Beginning to add support
	  for the ARMv7-A, the Cortex-A5 in particular.  The initial checkin
	  is only fragmentary:  A few header files and some copied ARM9
	  assembly files.  More to come (2013-7-18).
	* arch/arm/include/sama5, arch/arm/src/sama5, and configs/sama5d3x-e:
	  Add a directory framework to support the Atmel AT91SAMA5D3 family and
	  the SAMA5D3x-EK board(s) in particular.  There is very little here on
	  the first check-in, this structure is being used now primarily to
	  create the Cortex-A5 support (2013-7-19).
	* arch/arm/src/armv7-a/arm_cache.S:  Cortex-A5 cache operations
	  (2013-7-20).
	* /arch/arm/src/armv7-a/arm_fpuconfig.S and fpu.h: A few more files for
	  the ARMv7-A/Cortex-A5 port (2013-7-21).
	* arch/arm/src/sama5/sam_boot.c, sam_clockconfig.h, sam_lowputc.h, and
	  sam_timerisr.c:  A few  more files for the SAMA5D3 port (2013-7-21).
	* configs/sama5d3x-ek/src/sam_autoleds.c:  A few more files for the port
	  to the SAMA5D3x-EK board (2013-7-21).
	* arch/arm/src/sama5/sam_irq.c: SAMA5 interrupt handling logic
	  (2013-7-22).
	* arch/arm/src/sama5/sam_clockconfig.c:  Add SAMA5 PLL configuration
	  logic (plus associated header files).  Initiali checkin is for the
	  SAM3U which is very similar but needs to be verified (2013-7-22).
	* arch/arm/src/sama5/sam_periphclks.h:  Add macros to enable and
	  disable SAMA5 peripheral clocks (2013-7-22).
	* arch/arm/src/sama5/sam_lowputc.c and sam_serial.c:  Add support
	  for SAMA5 UARTs.  Does not even compile as of initial checkin.
	  (2013-7-22).
	* arch/arm/src/sama5/sam_gpio.c:  Add GPIO configuration support
	  for the SAMA5.  Still compilation issues.  (2013-7-22).
	* arch/arm/src/sama5/chip/sama5d3x_pinmap.h:  Add pin multiplexing
	  definitions for the SAMA5D3 (2013-7-23).
	* arch/arm/src/sama5/chip/:  New header files for SAMA5 AXI Matrix
	  SFR, and BSC blocks (2013-7-23).
	* arch/arm/src/armv7-a/arm_vectors.S:  Force 8-byte stack alignment
	  in interrupt handlers before calling C code.  Other ARM
	  architectures need to do this as well (2013-7-23).
	* arm/src/armv7-m/up_copyarmstate.c and armv7-a/up_copyarmstate.c:
	  Added a new form of the register copy function that should save quit a
	  bit of time for armv7-m (without common vectors) and with armv7-a
	  (2013-7-23).
	* arch/arm/src/armv7-a/arm_restorefpu.S, arm_savefpu.S, arm_doirq.c,
	  arm_fullcontextrestore.S, arm_saveusercontext.S:  Add hardware
	  floating point register save/restore logic for the Cortex-A5
	  (2013-7-23).
	* arch/Kconfig:  Attempt at generic external memory configuration is not
	  flexible enough, especially for the SAMA5.  Move external memory
	  configuration options from arch/Kconfig to
	  arch/arm/src/lpc17xx/Kconfig, lpc31xx/Kconfig, sam34/Kconfig, and
	  sama5/Kconfig and renamed each from CONFIG_ARCH_ to, for example,
	  CONFIG_LPC31_.  This renaming also affect many defconfig files
	  (2013-7-24).
	* arch/arm/src/sama5/Kconfig and sam_allocateheap.c:  Set up
	  configuration options for SAMA5 external memory regions; add a custom
	  sam_allocateheap.c to add the various configured memory regions to the
	  heap (2013-7-24).
	* configs/sama5d3x-ek/src/sam_buttons.c, sam_userleds.c, and
	  sam_autoleds.c:  Add support for the buttons and LEDs on-board the
	  SAMA5D3x-EK (2013-7-24).
	* configs/sama5d3x-ek/ostest/defconfig:  Switch console to USART1
	  (2013-7-4).
	* arch/arm/src/sam34/Kconfig and drivers/serial/Kconfig:  All serial
	  configuration logic for USARTs needs to depend on if the USART is
	  configured as a UART or not.  And this is for all CPUS, not just
	  SAM3/4 (2013-7-24).
	* arch/arm/src/arm/up_head.S and arch/arm/src/armv7-a/arm_head.S:
	  Fix a bug (uninitialized register error) that crept in the ARM9
	  boot-up code several years ago and was cloned into the Cortex-A5
	  code.  Obviously no one has used the ARM9 NuttX port for years!
	* Many files:  Finally... I changed the naming of configuration
	  variables like CONFIG_DRAM_ to CONFIG_RAM_.  This has bothered
	  me for a long time since most boards don't have DRAM.  The more
	  generic RAM naming should not produce so much cognitive dissonance
	  (2013-7-26).
	* configs/sama5d3x-ek/hello:  Added a tiny hello world configuration
	  to simplify bring up of the SAMA5 (it will probably be removed
	  later) (2013-7-26).
	* The sama5d3x-ek/hello now runs correctly (2013-7-28).
	* configs/sama5d3x-ek/ostest/:  This configuration has been modified
	  to run out NOR flash.  More work is still needed to reconfigure the
	  SMC so that the NOR flash can work with the high clock (2013-7-28).
	* arch/arm/src/sama5/sam_clockconfig.c/h and
	  configs/sama5d3x-ek/src/sam_norflash.c:  Add a file structure that
	  will (eventually) support reconfiguration of NOR flash when NuttX
	  boots from NOR FLASH (2013-7-29).
	* arch/arm/src/sama5/chip/sam_hsmc/h:  SAMA5 HSMC register
	  definition file (2013-7-29)
	* configs/sama5d3x-ek/src/sam_norflash.c:  Add board specific
	  logic to re-configure the SAMA5D3x-EK NOR FLASH before while
	  running out of NOR FLASH.  We need to change the NOR FLASH
	  timing BEFORE increasing the main clock (2013-7-29).
	* configs/sama5d3-ek/norboot and src/nor_main.c:  The norboot
	  configuration to help debug NuttX in NOR flash.  It runs
	  out of ISRAM, configures NOR FLASH, then waits for you to
	  break in with a debugger to start the program in NOR FLASH
	  (2013-7-29).
	* arch/arm/src/armv7-a/arm_cache.S:  Separate the bigger cache
	  operations into separater files (2013-7-29).
	* arch/arm/src/stm32/stm32_dac.c:  Fixed numerous DAC driver
	  errors and added support for DAC DMA (contributed by John
	  Wharington, 2013-7-30).
	* arch/arm/src/stm32/stm32f30xx_i2c.c:  An I2C driver for
	  the STM32 F3 family from John Wharington (2013-7-30).
	* arch/arm/include/armv7-m:  Add irqdisable() (2013-7-30);
	* configs/sama5d3-ek/src/nor_main.c:  Now disables interrupts
	  before jumping to NOR flash (2013-7-30).
	* configs/sama5d3-ek/nsh:  Add an NSH configuration for the
	  SAMA5D3x-EK (2013-7-31)
	* configs/sama5d3-ek/src/sam_cxxinitialize.c:  Add C++ support
	  (2013-7-31).

6.30 2013-09-14 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/sama5/arm_pghead.S:  Separate the logic that is
	  enabled by CONFIG_PAGING out of arm_head.S.  That was just
	  too much conditional compilation to be supportable
	  (2013-8-1).
	* arch/arm/src/sama5/arm_head.S: Setup page table mappings for
	  all of .text, .bss, .data, stacks and heap before enabling
	  the MMU and caching.  This is safer because it avoids the
	  caching issues (and much less redundant) (2013-8-1)
	* arch/arm/src/sama5/chip/sam_mpddrc.h:  Add DDR controller
	  registers definitions for the SAMA5 (2013-8-1).
	* nuttx/configs/sama5d3x-ek/src/sam_sdram.c:  Add logic which
	  will (eventually) support the SDRAM on the SAMA5D3x-EK
	  board.  Initial commit is untested and incomplete (2013-8-1).
	* arch/arm/src/armv7-a/arm_mmu.c:  Move some generic MMU logic
	  out of SAMA5-specific code into this share-able file (2013-8-2)
	* arch/arm/src/armv7-a/mmu.h:  Add inline functions to invalidate
	  a single TLB.
	* arch/arm/src/sama5/sam_allocateheap.c and chip/sama5d3x_memorymap.h:
	  Add logic to handle signed overflow when a memory region is
	  greater than or equal to 2GB (2013-8-2).
	* arch/arm/src/sama5/sam_boot.c:  Boot logic now initially
	  configures DRAM as strongly ordered so that it can be initialized.
	  After initialization, the page table entries are modified so
	  that DRAM is fully cache-able (2016-8-2).
	* arch/arm/src/sama5/chip/sam_mpddrc.h:  Correct typos in the
	  SAMA5 DDR controller register definitions (2013-8-2).
	* arch/arm/src/sama5/sam_irq.c:  Correct handling of spurious
	  interrupts (2013-8-3).
	* arch/*/src/*/*_irq.c:  Standardize configuration variables used
	  to enable interrupt controller debug output (2013-8-3).
	* arch/arm/src/sama5/chip/sam_dmac.h: Add register definitions for the
	  SAMA5 DMA controller (2013-8-3).
	* arch/arm/src/sama5/sam_dmac.c and sam_dmac.h:  Add support for the
	  SAMA5 DMAC controllers.  Initial check-in is untested and is a
	  straight leverage from the SAM3/4 (2013-8-4).
	* arch/arm/src/sama5/sam_spi.c, sam_spi.h, and chip/sam_spi.h:
	  Leverage SPI support from SAM/3/4.  Initial check-in is untested
	  and have several limitations:  No DMA, no SPI1 support (2013-8-4).
	* arch/arm/src/sama5/sam_spi.c and sam_spi.h:  Now supports SPI1
	  and a register access debug option (2013-8-4).
	* configs/sama5d3x-ek/src/sam_spi.c:  Add board support for the
	  AT25 serial flash (2013-8-4).
	* configs/sama5d3x-ek/nsh/defconfig:  FAT file system support is
	  now enabled by default (2013-8-5)
	* configs/sama5d3x-ek/src/sam_nsh.c:  Automatically mount AT25
	  file system for NSH if so configured (2013-8-5).
	* configs/sama5d3x-ek/src/sam_nsh.c:  Verified that the AT25 FLASH
	  works on the SAMA5D3x-EK boards and can support a FAT file system
	  (2013-8-5).
	* arch/arm/src/sam34/sam_spi.c:  Corrected an error in the SAM3/4
	  SPI driver while testing the SAMA5 SPI driver:  If CONFIG_SPI_OWNBUS
	  is not set, the driver will not configure the SPI mode correctly
	  (2013-8-5).
	* configs/sama5d3x-ek/src/sam_at25.c: Move AT25 initialization logic
	  out of sam_nsh.c and into a separate file where it can be better
	  shared (2013-8-5).
	* arch/arm/src/sama5/sam_hsmci.c, sam_hsmci.h, and chip.sam_hsmci.h:
	  Add register definitions and a driver for the (3) HSMCI memory card
	  interfaces provided by the SAMA5.  Leveraged from the SAM3/4 and
	  untested on initial commit (2013-8-5).
	* nuttx/configs/sama5d3x-ek/src/sam_hsmci.c and sam_nsh.c:  Add support
	  for the (2) SD card slots provided on the SAMA5D3x-EK boards.
	  Untested on initial commit (2013-8-5).
	* arch/arm/src/sama5 and nuttx/configs/sama5d3x-ek:  Massive renaming
	  to get consistent once and for in the usage of PIO vs GPIO.  Other
	  platforms use the term GPIO more, but Atmel prefers PIO.  I prefer
	  consistency.  Also fixed CONFIG_PIO vs CONFIG_SAMA5_PIO and renamed
	  files sam_gpio.* to sam_pio.* (2013-8-6).
	* arch/arm/src/sama5/sam_pioirq.c:  Add support for SAMA5 PIO interrupts
	  (2013-8-6).
	* configs/sama5d3x-ek/src/sam_hsmci.c:  Add support for SD slot card
	  detection PIO interrupts (2013-8-6).
	* arch/arm/src/sam34/sam_hsmci.c and sama5/sam_hsmci.c:  Fix handling
	  of some masked status conditions that can cause false-alarm errors
	  (2013-8-6).
	* arch/arm/src/sama5/sam_dmac.c and sam34/sam34_dmac.c:  For SAMA5,
	  correct some bad register address and some bad assertions that caused
	  false alarms.  These latter were backported to the SAM34 DMAC driver
	  as well (2013-8-6).
	* arch/arm/src/sama5/sam_dmac.c and sam34/sam34_dmac.c: Correct
	  some parameters reversed in function call (2013-8-6).
	* arch/arm/src/sama5/sam_spi.c:  The SAMA5 SPI driver now supports
	  DMA transfers (2013-8-9).
	* arch/arm/src/sama5/sam_dmac.c:  Finally after many bugfixes (the
	  last being caching issues), the SAMA5 DMA support has been
	  verified (with SPI) (2013-8-9).
	* arch/arm/src/sama5/sam_memories.c and .h:  Centralize logic for
	  conversions between physical and virtual addresses (2013-8-9).
	* arch/arm/src/sama5/sam_hsmci.c and sam34/sam_hsmci.c:  Correct a
	  race condition in the SAMA5 HSCMI driver:  The transfer done
	  interrupt was firing before the wait was started.  Fix this and
	  also backported the changes to SAM3/4 (untested).  Now HSCMI is
	  functional on the SAMA5 with DMA! (2013-8-10).
	* arch/arm/src/sam34/sam3u_periphclks.h: Correct a typo in a register
	  name (2013-8-10).
	* drivers/mmcsd/mmcsd_sdio.c:  Correction for a bad return value
	  when multiple block SDIO transfers are suppressed.  By Andrew Tridgell
	  via Lorenz Meier (2013-8-10).
	* drivers/serial/serial.c, drivers/usbdev/cdcacm.c, and
	  include/nuttx/fs/ioctl.h: Added support for FIONREAD and FIONWRITE,
	  added TERMIOS input / output processing support for UART and CDCACM
	  serial ports. Implemented by Mike Smith, Andrew Tridgell and Lorenz
	  Meier (2013-8-10).
	* drivers/usbdev/cdcacm.c:  Added FIONREAD and FIONWRITE to CDC/ACM
	  driver based on serial.c implementation. From Lorenz Meier
	  (2013-8-10).
	* arch/arm/src/stm32/Kconfig and stm32_serial.c:  Added option to
	  disable serial port reordering.  From Lorenz Meier (2013-8-10).
	* arch/arm/src/sama5/Kconfig, sam_ohci.c, and
	  arch/arm/src/sama5/sam_clockconfig.c:  Add a OHCI driver for the SAMA5.
	  Untested on initial check-in (2013-8-11).
	* include/nuttx/usb/usbhost.h, arch/arm/src/stm32, arch/arm/src/lpc17xx,
	  and include/nuttx/usb/usbhost.h, and nuttx/configs/<stm32-boards>:
	  Move prototype of usbhost_initialize() of usbhost.h and into
	  architecture specific files.  This is necessary because some chips
	  (like the SAMA5) have multiple, different USB host interfaces
	  (2013-8-11).
	* drivers/usbhost/usbhost_hidkbd.c and usbhost_storage.c:  Correct some
	  compilation errors when pre-allocated class structures are used.  Also
	  eliminate some warnings about uninitialized variables (2013-8-11).
	* configs/sama5d3x-ek/src/sam_usb.c and related files:  Add support for
	  initialization of the USB host and mass storage class device (2013-8-11).
	* arch/arm/src/sama5/sam_ohci.c and sam_usbhost.h (was sam_ohci.h), and
	  configs/sama5d3x-ek/src/sam_usb.c, and sama5d3x-ek.h:  Add controls
	  to enable VBUS power in OHCI host most (2013-8-12).
	* includes/nuttx/usb/usbhost.h, all USB host drivers in arch/, and all
	  USB host-side connection monitoring threads in configs/*/src:  The
	  SAMA5 has three downstream ports; all of the other USB host
	  implementations have only one.  This will require significant changes
	  to the USB host interfaces starting with these chnages to monitor
	  connections on a port-by-port basis.  This effects a lot of files and
	  more changes are coming for this issues.  Changes are being blindly
	  incorporated into other architrectures.  I am being careful to avoid
	  breakage, but I expect some (2013-8-12).
	* configs/olimex-stm32-p107/nsh/defconfig and appconfig:  Converted to
	  use the kconfig-frontends tool. From Max Holtzberg (2013-8-12).
	* includes/nuttx/usb/usbhost.h, et al:  Continued changes to the USB
	  host interface to support multiple downstream ports.  When a class
	  is disconnected, it needs to provide the FunctionAddress to the
	  USB HCD disconnect method so that the HCD will know which port
	  is being disconnected (2013-8-12).
	* nuttx/arch/arm/src/stm32/Kconfig, Make.defs, and /stm32f30xxx_i2c.c:
	  STM32 F3 I2C fixes from John Wharington (2013-8-13).
	* nuttx/arch/arm/src/sama5/sam_serial.c:  Fix a re-entrancy problem
	  in up_putc().  I think all architectures have this re-entrancy
	  than can result in serial interrupt being disabled, but I have only
	  seen the symptom on SAMA5 (2013-8-13).
	* includes/nuttx/usb/usbhost.h and many other affected files:  Separate
	  wait() and enumerate() methods from struct usbhost_driver_s and move
	  to new interface, struct usbhost_connection_s.  This is part of the
	  necessary restructuring of the USB host interface to support multiple
	  root hub ports (2013-8-13).
	* arch/arm/src/sama5/sam_ohci.c:  Major restructuring of the driver due
	  in order to handle multiple root hub ports.  Basically instead of one
	  driver structure with an arrayof root hub port structures, there is no
	  one container structure with an array of driver structures, one for
	  each root hub port.  The advantage is that each class->driver call not
	  passes information associated with the RHport implicitly.  The klugey,
	  procedural alternative was to add the function address to every
	  interface method (which I started to do but backed above) (2013-8-13).
	* arch/arm/src/sama5/sam_memories.c and .h:  Extended logic so do
	  conversions from physical to virtual addresses (2013-8-14).
	* arch/arm/src/sama5/sam_ohci.c:  Add D cache contols and conversion
	  between physical and virtual address (2013-8-14).
	* arch/arm/src/stm32/stm32_spi.c:  nbits() interface extended to
	  control bit order as well as bit width (from Teemu Pirinen)
	  (2013-8-16)
	* arch/arm/src/sama5/sam_ohci.c:  More to be tested, but the SAMA5
	  OHCI driver is now basically funtional (2013-8-16).
	* include/nuttx/usb/ehci.h:  EHCI header file (2013-8-17).
	* arch/arm/src/stm32/stm32_i2c.c:  Correct an error that crept into
	  the STM32 F1 I2C driver with some recent changes.  From Yiran Liao
	  (2013-8-18).
	* drivers/usbhost/usbhost_devaddr.c and include/nuttx/usb/usbhost_devaddr.h:
	  Add logic for management of device addresses.  This logic does not
	  currently hook into into anything.  It will someday be a part of the
	  NuttX USB hub implementation (2013-8-18).
	* nuttx/arch/arm/src/sama5/sam_ehci.c and other files:  Create a skeleton
	  environment for development of an EHCI driver.  Not much in place yet
	  (2013-8-20).
	* nuttx/arch/arm/src/sama5/sam_ehci.c:  Now code complete for all
	  asynchronous endpoints (control and bulk); nothing yet in place
	  for periodic endponts (interrupt and isochronous) (2013-8-22).
	* include/nuttx/serial/serial.h and arch/arm/src/stm32/chip/stm32f40xxx_pinmap.h:
	  SourceForge bug #16 Fix IO pin map. Add CONFIG_SERIAL_TERMIOS support.
	  Also fixes some STM32 F4 Timer 8 pin configurations.  From CCTSAO
	  (2013-8-23).
	* arch/arm/src/lpc17xx/lpc17_usbhost.h:  Fix #endif with missing #if
	  condition.  Reported by Andrew Bradford (2013-8-23).
	* nuttx/arch/arm/src/sama5/sam_ehci.c:  Now handles low- and full-speed
	  connections by giving the port to the OHCI driver (2013-8-24).
	* nuttx/arch/arm/src/sama5/sam_ohci.c:  Now uses the work queue to
	  defer interrupt processing (2013-8-24).
	* nuttx/arch/arm/src/sama5/sam_ohci.c and nuttx/arch/arm/src/sama5/sam_ehci.c:
	  EHCI is now the common interrupt "master."  It will receive all UHPHS
	  interrupts and route the interrupt event to both the OHCI and EHCI
	  logic (2013-8-24).
	* net/uip/uip_arp.c:  Correct backward condition in netmask task.
	  From Max Holtzberg (2013-8-25).
	* arch/arm/src/sama5/sam_ohci.c:  SAMA5 OHCI is again functional by
	  itself after all of the changes to integrate with EHCI. (2013-8-25).
	* drivers/net/encx24j600.c/.h and include/nuttx/net/encx24j600.h:
	  Support the Microchip ENCX24J600 Ethernet driver from Max Holtzberg
	  (2013-8-25).
	* configs/olimex-stm32-p107:  Incorporate ENCX24J600 support for the
	  Olimex STM32 P107 board.  From Max Holtzberg (2013-8-25).
	* fs/romfs/fs_romfsutil.c:  Fix an error where long (>15) file names
	  were read incorrectly from a ROMFS file system.  From Mike Smith
	  (2013-8-25).
	* arch/arm/src/stm32/stm32_sdio.c: SourceForge bug #17 Fix if
	  CONFIG_SDIO_BLOCKSETUP defined, OS will crash". Generate an error
	  if CONFIG_SDIO_BLOCKSETUP is defined; that option is not yet supported
	  by the STM32 SDIO driver.  From CCTSAO (2013-6-26)
	* drivers/net/encx24j600.c and .h: Use the ENC's SRAM for multiple TX
	  packets.  From Max Holtzberg (2013-6-26).
	* include/nuttx/usb/usbhost.h, drivers/usbhost/usbhost_enumerate.c, and
	  all USB host drivers:  Added a new driver method:  getdevinfo.  This
	  method is intended to get various information about the connected device,
	  but currently returns only the device speed.  The device speed is
	  necessary by usbhost_enumerate in order to set a credible initial EP0
	  max packetsize.  High speed needs 64 bytes, low speed needs 8 bytes,
	  and full speed can handle almost any size (2013-8-26).
	* arch/arm:  Add hooks for Cortex-A8.  Not much more yet (2013-8-27).
	* Lots of files:  Fix all occurrents of "the the" in documentation and
	  comments (2013-8-27).
	* arch/arm/src/sama5/sam_allocateheap.c:  Correct the logic that
	  determines which memory regions get added to the heap.  When
	  CONFIG_MM_NREGIONS > 1, the logic was adding the ISRAM region to
	  the heap twice! (2013-6-27).
	* nuttx/arch/arm/src/sama5/sam_ehci.c:  Add (untested) support for
	  interrupt endpoints (2013-8-28).
	* arch/arm/src/sama5/chip/sam_udphs.h:  High-speed USB device register
	  definitions for the SAMA5 (2013-8-28)
	* arch/arm/src/sama5/sam-udphs.c:  A framework for the USB device
	  driver taken from another architecture.  There is very little
	  useful in this initial check-in (2013-8-29).
	* Remove all empty and most useless README.txt files (2013-8-31)
	* configs/freedom-kl25z/src/kl_spi.c:  Correct typo in name of a
	  function.  From Alan Carvalho de Assis (2013-8-31).
	* drivers/usbdev/cdcacm_desc.c:  Fixed some compilation errors that
	  only occur when dual speed support is enabled (2013-9-1).
	* arch/arm/src/sama5/sam_clockconfig.c and configs/sama5d3x-ek/include/board_*mhz.h:
	  Add logic to support UDPHS clocking (2013-9-13).
	* arm/src/stm32/chip/stm32_tim.h:  Some CCER bit settings changed
	  per SourceForge bug #18 submitted by CCCTSAO (2013-9-2).
	* apps/examples/cc3000, configs/freedom-kl25z, drivers/wireless/cc3000,
	  and nuttx/include/nuttx/cc3000.  Initial support for the TI CC3000
	  network module on the Freescale Freedom-KL25Z board from Alan Carvalho
	  de Assis.  This is still very much a work in progress (2013-9-3).
	* configs/*/usbmsc:  Renamed from config/*/usbstorage to match the
	  change in naming in apps/examples submitted by CCTSAO (2013-9-5).
	* drivers/usbdev/cdcacm.c and pl2303.c:  Don't use max packetsize assigned
	  to the endpoint when allocating request buffers; The default value of
	  the endpoint max packetsize may be incorrect because the endpoint
	  has not yet been configured.  Verified on CDC/ACM.  Corresponding
	  changes made to pl2303, but untested (2013-9-5).
	* arch/arm/src/sama5/sam_udphs.c:  The high-speed device side driver
	  is now functional (although more testing is always needed) (2013-9-5).
	* net/net_monitor.c: Fixes a race condition where a loss of connection
	  may not be detected when the connection is lost before it has been
	  accepted (from Max Holtzberg) (2013-9-6).
	* configs/sama5d3x-ek/demo:  Add a new NSH configuration.  The
	  original NSH configuration will be a simple platform for testing
	  individual features; the demo configuration will be a more complex
	  platform for demonstrating multiple interacting features (2013-9-6).
	* net/uip/uip_tcpbacklog.c:  Fix a major bug in the TCP/IP backlog
	  initialization:  Only the first backlog buffer was getting added
	  to the free list.  From Max Holtzberg (2013-9-6).
	* configs/sama5d3x-ek/demo:  Add support for USB MSC device on the
	  AT25 serial FLASH (untested) (2013-9-6).
	* drivers/net/enc28j60.c:  Changes back-ported from the ENCX24J600
	  to the ENC28J60 by Max Holtzberg.  These seem like reasonable and
	  correct changes, but have yet to be verified on an ENC28J60 (2013-9-6).
	* drivers/usbdev/usbdev_strings.c:  Extended decoding and stringifying
	  of USB trace output to include trace output from class drivers.
	  (2013-9-6).
	* drivers/usbdev/usbmsc_desc.c:  Fix a warning when USB MSC is
	  compiled for a high-speed device (2013-9-7).
	* drivers/usbhost/usbhost_storage.c:  If device is returning fatal
	  transfer errors while attempt to initialize, don't bother with
	  the startup retries; abort immediately so that the device will
	  be reset and we can try again (2013-9-9).
	* drivers/usbhost/usbhost_storage.c:  Correct a reference counting
	  error:  When an MSC device transfer fails while waiting for
	  UnitTestReady (see 2013-9-9), the reference count was not being
	  decremented.  The end result is a memory leak (2013-9-10).
	* arch/arm/src/sama5/chip/sam_twi.h:  Added SAMA5 TWI register
	  definition file (2013-9-11).
	* arch/arm/src/sama5/sam_twi.c and .h:  Framework for a SAMA5
	  TWI driver (not much present in initial checkin) (2013-9-11).
	* fs/nxffs:  Clean up some compilation warnings (2013-9-12)
	* drivers/mtd/at24xx.c:  Add support for the AT 24C512 part
	  (2013-9-12).
	* arch/arm/src/sama5/sama5_twi.c:  Clean up some errors that
	  only occur with CONFIG_DEBUG_I2C (2013-9-12).
	* arch/arm/src/sama5/chip/sam_emac.h and sam_gmac.h:  Register
	  definition files for the SAMA5 EMAC and GMAC peripherals
	  (incomplete on the initial commit) (2013-9-12).
	* arch/arm/src/stm32/stm32_can.c:  Make filter register accessible
	  for CAN1 and CAN2. Patch provided by Lorenz Meier (2013-9-13).
	* nuttx/include/nuttx/usb/cdcacm.h:  Fix backward conditional
	  compilation in the CDC/ACM driver with regard to remote
	  wakeup and self-powered capabilites.  Provided by Lorenz Meier
	  (2013-9-13)
	* fs/romfs/fs_romfsutil.c: Fix for filenames > 15 characters.
	  Provided by Lorenz Meier (2013-9-13).
	* arch/arm/src/stm32/Kconfig: Fix STM32 UART7/8 kconfig names
	  and UART DMA.  Provided by Lorenz Meier (2013-9-13).
	* configs/maple:  Board configuration for the LeafLabs Maple
	  and Maple Mini boards.  From Librae (2013-9-13).
	* arch/arm/src/sama5/sam_emac.c and .h:  Skeleton files for
	  a SAMA5 EMAC driver.  Not much in the initial files; these
	  are just hacked out and gutted versions of the corresponding
	  STM32 files (2013-9-13).

6.31 2013-10-28 Gregory Nutt <gnutt@nuttx.org>

	* nuttx/fs/romfs/fs_romfsutil.c:  Back out part of a recent
	  ROMFS change (2013-9-14).
	* configs/sama5d3x-ek/src/sam_ethernet.c:  Add support for
	  PHY interrupts (2013-9-15).
	* arch/arm/src/kl/chip/kl_pit.h and kp_tpm.h:  Add register
	  definitions for the Freescale Kinetis KL25Z from Alan
	  Carvalho de Assis (2013-9-15).
	* configs/ and a few Ethernet drivers:  Add the prefix ETH0
	  to all PHY configuration selections.  This will allow us
	  to support to Ethernet MAC drivers with two different
	  PHYs (identified with ETH0 and ETH1) (2013-9-17).
	* net/Kconfig and drivers/net/Kconfig:  Move PHY selections from
	  net/Kconfig to drivers/net/Kconfig where they belong.  Add the previx
	  ETH0_ to each PHY selection.  And a new configuration
	  CONFIG_NETDEV_MULTINIC that can be set to enable support for multiple
	  Ethernet MAC drivers (not fully implemented yet).  When Enabled,
	  another set of PHY selections are enabled for ETH1_ (2013-9-17).
	* include/nuttx/net/mii.h:  Add definitions for the Micrel KSZ8051 PHY
	  (2013-9-17).
	* configs/zkit-arm-1768:  MMC/SD is on SPI, not SSP0.  From Rashid
	  Fatah (2013-9-17).
	* configs/: Lots of defconfig files changes.  A consequence of the
	  above renaming and moving of the PHY configuration settings is
	  that the you now also have to set CONFIG_NETDEVICES=y if you
	  need to set a PHY configuration (2013-9-17).
	* arch/arm/src/lpc17xx/lpc17_spi.c:  Remove undefined spi_select()
	  prototype.  This was causing compile time warnings (2013-9-17).
	* configs/sama5d3x-ek/src/sam_ostest.c:  Add OS test support for
	  the FPU test (2013-9-18).
	* arch/arm/src/sama5/sam_usbhost.h and include/nuttx/usb/usbhost_trace.h
	  Correct some inconsistencies in the way that USB configuration
	  settings are used.  This caused compilation errors in SAMA5 OHCI
	  when USB debug was ON but USB host tracing was off (2013-9-19).
	* nuttx/arch/arm/src/sama5/sam_clockconfig.c:  When 480MHz UPLL
	  is used to drive OHCI, it should have a divider of 10.  However,
	  that does not work.  A divider of 5 does.  Why? (2013-9-19).
	* Several USB device driver files:  Change naming of SELFPOWERED
	  and REMOTEWAKEUP to avoid name collisions.  Prepend the name
	  of the driver (for example CDCACM_SELFPOWERED) (201309-20).
	* configs/sama5d3x-ek/nsh and demo: Increase the number of pre-allocated
	  watchdog timers.  The default number of 4 was easily being exhausted
	  in the more complex configurations.  Enable the task name feature
	  to provide prettier ps command output.  src/sam_usb.c:  Use more
	  descriptive task names when starting the EHCI and OHCI monitor tasks
	  (2013-9-20).
	* arch/arm/src/sama5/sam_ohci.c:  Fix a place where DMA-related data
	  needed to be flushed to data cache; Fix another where a virtual address
	  was being used in a register where a physical address was required
	  (2013-9-20).
	* arch/arm/src/armv7-a/cp15_clean_dcache.S and cp15_flush_dcache.S:
	  fix an error in the alignment of addresses to cache line boundaries
	  (2013-9-21).
	* drivers/usbdev/cdcacm_desc.c:  Change the interval for the interrupt
	  endpoint from 0xff (invalid) to 10.  This is not a critical change
	  but will avoid a complaint from the Linux driver when it overrides
	  the 0xff value (2013-9-22).
	* configs/zkit-arm-1769:  LED1 is now user controllable after booting.
	  From Rashid Fatah (2013-9-23).
	* arch/arm/src/sama5/sam_hsmci.c:  TX DMA disabled.  It is just not
	  reliable. No idea why.  RX DMA is still used (2013-9-23).
	* driver/net/encx24j600.c:  UDP/RXAVAIL backlog support from Max
	  Holtzberg (2013-9-24).
	* Standardized stack checking logic so the interfaces can be used
	  by common stack monitoring logic (2013-9-24).
	* drivers/net/Kconfig:  Move CONFIG_NET_DUMPPACKET out of LPC17
	  and STM32 Kconfigs into the common network driver Kconfig (2013-9-25).
	* arch/arm/src/sam_emac.c:  EMAC driver is basically functional.  More
	  testing is needed (as always) (2013-9-25).
	* configs:  Changes to many defconfig files resulting from moving
	  apps/examples/usbmsc to apps/system/usbmsc (2013-9-25).
	* configs:  Changes to many defconfig files resulting from moving
	  apps/examples/cdcacm to apps/system/cdcacm (2013-9-25).
	* configs:  Changes to many defconfig files resulting from moving
	  apps/examples/composite to apps/system/composite (2013-9-25).
	* configs/stm3210e-eval/composite:  Converted to use the kconfig-
	  frontends tool (2013-9-25).
	* arch/arm/src/sama5/sam_gmac.c:  Initial GMAC driver is really
	  just the EMAC driver forced to compile with the GMAC register
	  definitions (2013-9-26).
	* arch/arm/src/sama5/sam_gmac.c and include/nuttx/net/gmii.h:
	  Beginning of support for GMII/RGMII PHY support (2013-9-26)
	* net/netdev_txnotify.c:  Look up of device using subnet will fail
	  if the packet is being sent out of our subnet (via a router).
	  The fallback here is just to use "eth0" if the subnet lookup
	  fails.  This will, of course, will have to be revisited if/when
	  multiple NICs are supported.  From Max Holtzberg (2013-9-27).
	* net/send.c:  Fix some backward conditional logic in check
	  to see if we should check if the ARP address in the table.  From
	  Max Holtzberg (2013-9-27).
	* drivers/net/encx24j600.c:  Removed logic that polls for the
	  next outgoing packet from the TX done interrupt handling.  From
	  Max Holtzberg (2013-9-27)
	* sched/os_start.c:  Should not call group_setupidlefiles() if there
	  are no file descriptors (and, hence, no file system) (2013-9-27).
	* arch/arm/src/sama5/sam_gmac.c:  GMAC driver and GMII logic is
	  code complete and ready for test (2013-9-27)
	* configs/compal_e86: Basic board support for the Motorola C139
	  (Compal E86) phone.  From Craig Comstock (2013-9-27).
	* configs/compal_e86: Converted to use the kconfig-frontends
	  tools (2013-9-27).
	* drivers/net/encx24j500.c: Use separate pools for RX and TX
	  descriptors.  From Max Holtzberg (2013-9-28).
	* nuttx/fs/fs_sendfile.c, nuttx/net/net_sendfile.c, and other file:
	  Integrate an optimized sendfile() operation from Max Holtzberg
	  (2013-9-28).
	* tools/mkdeps.*, nuttx/mm/Makefile, nuttx/libc/Makefile:  Dependency
	  generation generation was broken for directories that keep objects in
	  a sub-directory.  Fixed by adding a object path to the mkdeps.c,
	  mkdeps.bat, mkdeps.sh tools (2013-0-29).
	* arch/arm/src/sama5/chip/sam_adc.h:  ADC register definition file.
	  Incomplete on initial check-in (2013-9-29).
	* arch/arm/src/sama5/sam_adc.c and .h:  Framework for an ADC
	  driver to come (just empty "skeleton" files on initial commit)
	  (2013-9-30).
	* arch/arm/src/sama5/sam_touchscreen.h and .h:  Framework for a
	  touchscreen driver (also an empty "skeleton" file on the initial
	  commit) (2013-9-30).
	* arch/arm/src/kl/kl_lowgetc.c and .h:  First cut at low-level
	  getc() function for operation with no file system (and, hence,
	  no serial driver) (from Alan Carvalho de Assis, 2013-9-30).
	* configs/freedom-kl25z/minnsh:  A new configuration that is
	  an experiement to see how small we can get the NuttX footprint.
	  From Alan Carvalho de Assis. (2013-9-30).
	* net/net_sendfile:  The high performance sendfile logic is
	  now functional.  From Max Holtzberg (2013-9-30).
	* tools/define.sh:  'cut' no longer works as it once did.  Script
	  adapted to observed behavior (2013-9-30).
	* include/nuttx/net/route.h and net/net_*route.c:  Partial
	  implementation of a routing table. Not yet hooked into the
	  build system (2013-10-1)
	* include/net/route.h:  Defines the application interface to
	  the routing table (2013-10-2).
	* configs/spark:  Add configuration for the Spark Core.  The
	  initial check-in is basically the Maple Mini board (2013-10-2).
	* include/net/route.h and libc/net/lib_addroute.c and delroute.c:
	  Add an application interface to manage the routing table
	  (2013-10-2).
	* arch/arm/src/sama5/sam_adc.c and sam_tsc.c:  The SAMA5
	  touschscreen drive is basically functional) (2013-10-3)
	* arch/arm/src/sama5/chip/sam_lcdc.h:  Add SAMA5 LCD register
	  definition header file (2013-10-4).
	* net/netdev_findbyaddr.c:  Now (1) uses the routing table
	  if available to look up the router to get to a remote network,
	  and (2) if there is only a single network device and no
	  route, then it will simply return that single device.  The
	  ARP logic will use the default router address associated with
	  the interface in this case (2013-10-5).
	* net/netdev_router.c and net/uip/uip-arp.c:  When the target IP address
	  does not lie on the device's networker when we have a routing table,
	  looking the correct router IP address to use in the ARP request.
	  In that case, we want the MAC address of the router, not of the
	  target endpoint (2013-10-5).
	* net/netdev_rxnotify.c and others: Use the new signature of rxnotify
	  caused by the routing table.  From Max Holtzberg (2013-10-6).
	* arch/arm/src/sama5/sam_lcdc.c and .h: Empty "skeleton" file that
	  will eventually become an LCDC driver for the SAMA5 (2013-10-6).
	* net/net_close.c, net/uip/uip_tcpcon, and include/nuttx/net/uip/uip-tcp.h:
	  Make net_close() nonblocking and free unestablished connections if no
	  free connections available.  From Max Holtzberg (2013-10-6).
	* net/net_close.c and other:  Update of change of 2013-10-6 from
	  Max Holtzberg (2013-10-8).
	* arch/arm/src/sama5/sam_lcd.c: LCDC driver is code complete and
	  incorporated into the build system (but still untested (2013-10-8).
	* configs/sama5d3x-ek/nx:  Add an examples/nx configuration that
	  will be used for the SAMA5 LCD bring-up (2013-10-8).
	* configs/arduino-due/Kconfig and include/board.h:  Add configuration
	  to select revision 3 of the Arduino Due which has some small
	  but important differences.  Suggested by gdi@embedders.org.
	* arch/arm/src/sama5/sam_allocateheap.c, Kconfig, chip/sama5d3_memorymap.h:
	  Add support so that subsets of the total DRAM (and other external
	  memory) can be added to the heap, leaving other memory reserved for
	  other purposes (like LCDC framebuffers) (2013-10-10).
	* arch/arm/src/sama5/sam_lcd.c:  Change how DMA descriptors are
	  allocated.  My reading of the SAMA5 MATRIX is that the LCDC will
	  be unable to DMA from internal SRAM (2012-10-10).
	* arch/arm/src/sama5/Kconfig and configs/sama5d3x-ek/nx/defconfig:  The
	  default LCD resolution is now RGB565.  Added output resolution selection
	  which can be different from the software resolution (2013-10-10.
	* arch/arm/src/sama5/sam_lcd.c wait before modifying register if the LCDC
	  is re-synchronizing (SIF). Use start-up configuration settings from
	  Barebox.  They still don't work (2013-10-10).
	* net/net_monitor.c: Notify the socket layer if a connection is lost
	  before the monitoring callback has been registered.  From Max
	  Holtzberg (2013-10-11).
	* net/recvfrom.c, sendto.c, uip/uip_input.c, uip/uip_udpcallback.c,
	  uip/uip_udpconn.c, uip/uip_udpinput.c:  Changed the meaning of the
	  uip_*input functions. They now return success when a packet is
	  dropped; This is needed for the ENCX24J600 driver that must make
	  a decision to return the packet or not:  It should not retry
	  dropped packets. From Max Holtzberg (2013-10-11).
	* drivers/net/encx24j600.c and Kconfig: ENCX24J600: Improved descriptor
	  handling, free packets on rx abort interrupt. From Max Holtzberg
	  (2013-10-11).
	* arch/arm/src/sama4/sam_lcd.c and configs/sama5d3x-ek/include/board.h:
	  Fix PWM precealler divider.  This eliminiates the backlight flicker
	 (2013-10-11).
	* arch/arm/src/sama5/sam_boot.c: Correct how framebuffer memory was
	  being mapped.  The mapping was getting overrwritten and the
	  framebuffer memory was ending up cacheable (2013-10-13).
	* arch/arm/src/sama5/Kconfig, sam_lcdc.c, defconfig, and related files:
	  Remove options for obtaining framebuffer memory in other ways.  That
	  option just really cannot work (2013-10-13).
	* configs/sama5d3x-ek/nxwm:  Add NxWM configuration for SAMA5D3x-EK
	  (2013-10-13).
	* configs/sama5d3x-ek/nxwm/defconfig:  Now uses scaled icons in the
	  the NxWM taskbar (2013-10-15).
	* configs/sama5d3x-ek/nxwm/defconfig:  Use the 320x320 NuttX logo as
	  the NxWM background (2013-10-15).
	* arch/arm/src/stm32/chip/stm32f103c_pinmap.h:  Pinmapping corrections
	  from David Sidrane (2013-10-16).
	* configs/spark:  The Spark device configuration is receiving some
	  TLC from David Sidrane (2013-10-16).
	* drivers/mtd/sst25.c:  Add support for the SST25VF016B.  From David
	  Sidrane (2013-10-16).
	* net/net_close.c: Changed net_close debug output to verbose.  From
	  Max Holtzberg (2013-10-17).
	* net/send.c and net_sendfile.c:  Reset the send timeout when the
	  data is ACKed, not when the data is sent.  Remove conditions on
	  checking for timeout.  From Max Holtzberg (2013-10-17).
	* net/net_sendfile.c:  Correct parameter passed to netdev_txnotify()
	  from Max Holtzberg (2013-10-17).
	* include/nuttx/net/uip/uip-tcp.h, net/send.c, uip/uip_tcpconn.c, and
	  uip/uip_tcpinput.c:  Change how the initial minimum MSS is calculated.
	  Max Holtzberg (2013-10-17).
	* net/uip/uip_tcpinput.c:  Move tcp connection into SYN_RCVD state
	  after aception instead of bypassing and moving directly into ESTABLISHED.
	  From Max Holtzberg (2013-10-17).
	* net/net_sendfile.c:  Let the ACK callback handle the REXMIT flag and
	  don't return until all data has been ACK'd. From Max Holtzberg
	  (2013-10-17).
	* arch/arm/src/stm32/chip/stm32f40xxx_dma.h: Typo fixes for UART7 and
	  UART8 DMA configs.  From Mike Smith (2013-10-18).
	* arch/arm/src/stm32/Kconfig:  DMA priority corrections from Mike Smith
	  (2013-10-18).
	* arch/arm/src/stm32/stm32*_dma.c, stm32_sdio.c, and stm32_dma.h:
	  Changes to the stm32_dmacapable API. In order to correctly verify that
	  a buffer can be transferred, the transfer count and the CCR value are
	  required.  Implemented stm32_dmacapable for stm32f1xx devices. Enhanced
	  stm32_dmacapable for stm32f2xx and stm32f4xx devices to check for
	  additional conditions that will cause DMA to fail or lose data (2013-10-18).
	* include/nuttx/sdio.h:  Add a preflight method to the SDIO interface.
	  From Mike Smith (2013-10-18).
	* drivers/mmcsd/mmscd_sdio.c: Enhanced the mmcdd_sdio driver to perform
	  DMA preflight operations and fail DMA read/write requests that fail
	  preflighting. From Mike Smith (2013-10-18).
	* fs/fat/fs_fat32.c: Enhanced the FAT32 filesystem code to understand DMA
	  preflight failures, and to use the file sector buffer as a bounce buffer
	  when a user-supplied buffer is not suitable for DMA. From Mike Smith
	  (2013-10-18).
	* arch/arm/src/sama5/chip/sam_rtc.h and sam_wdt.h:  Add WDT and RTC
	  register definition header files (2013-10-18).
	* arch/arm/src/sama5/chip/sam_rtc.c and sam_rtc.h:  Basic RTC driver.
	  Support for RTC alarms is fragmentary and this has not yet been hooked
	  into the build system  (2013-10-18).
	* Various Spark and CC3000 files:  Update by David Sidrane (2013-10-18).
	* arch/arm/src/sama5/chip/sam_gpbr.h:  Add SAMA5 GPBR register
	  definitions (2013-10-19).
	* Kconfig:  Add support for CONFIG_DEBUG_RTC (2013-10-19).
	* configs/sama5d3x-ek/README.txt, demo/defconfig:  Describe how to
	  enable RTC support for the nsh/ configuration; RTC is now enabled by
	  default in the demo configuration (2013-10-19).
	* arch/arm/src/sama5/sam_rtc.h and other files:  Hook the SAMA5 RTC
	  driver into the build system; Verify the correct operation of the
	  SAMA5 RTC driver (2013-10-19).
	* arch/arm/src/sama5/sam_wdt.c and .h:  Add a SAMA5 watchdog timer
	  driver. Untested on initial check-in (2013-10-19).
	* arch/arm/src/sama5/sam_trng.c, sam_trng.h, and chip/sam_trng.h:  Add
	  a /dev/random driver based on the SAMA5D3 TRNG peripheral (2013-10-20).
	* configs/sama5d3x-3k/demo:  The TRNG and /dev/random are now enabled
	  by default in the demo configuration (2013-10-20).
	* arch/arm/src/sama5/chip/sam_tc.h:  SAMA5D3 timer/counter register
	  definition header file (2013-10-20).
	* libc/stdio/lib_sscanf.c:  scanf() fixes from kfrolov: 1) sscanf()
	  function hangs in the following example: sscanf("2", "%u,%u,%u,%u", ...),
	  2) sscanf() returns incorrect number of parsed numbers if some arguments
	  can't be parsed: sscanf("=2", "%u,%u,%u,%u",...)==1 instead of 0, and
	  3) using of char* instead of const char* in vsscanf function leads to
	  warnings from GCC (2013-10-21).
	* arch/arm/src/sama5/chip/sam_can.h:  SAMA5D3X CAN register definition
	  header file (2013-10-21)
	* arch/arm/src/sama5/sam_can.c and .h:  Framework for a SAMA5 CAN driver.
	  Initial checkin is the STM32 CAN driver with name changes (2013-10-21).
	* arch/arm/src/sama5/sam_can.c and .h: SAMA5 CAN driver is code complete
	  but still untested (2013-10-22).
	* configs/spark:  Spark configuration updated by David Sidrane (2013-10-23).
	* drivers/wireless/cc3000:  CC3000 driver updates from David Sidrane
	  (2013-10-23).
	* include/nuttx/wireless/cc3000:  More CC3000 driver updates from David
	  Sidrane (2013-10-23).
	* net/Kconfig, drivers/net/wireless/cc3000/Kconfig, and Kconfig:  Add
	  ARCH_HAVE_NET that determines if a network is present or not.  This
	  currently can happen if CONFIG_NET is set or if CONFIG_WL_CC3000 is
	  is set (23013-10-23).
	* arch/arm/src/stm32/stm32f10xxx_dma.c:  DMA fix from David Sidrane:
	  The DMA_CNDTRx register cannot be modified if the DMA channel is
	  disabled (2013-10-23).
	* arch/arm/src/sama5/sam_tc.c and .h:  First cut at a timer/counter
	  library for the SAMA5D3 (2013-10-23).
	* configs/spark/nsh/defconfig:  Spark configuration update from David
	  Sidrane (2013-10-24).
	* drivers/wireless/cc3000/cc3000.c:  CC3000 driver update from David
	  Sidrane (2013-10-24).
	* arch/arm/include/stm32/chip.h and arch/arm/src/stm32/Kconfig:
	  Add support for the STM32F207ZE chip. From Martin Lederhilger
	  (2013-10-24).
	* arch/arm/src/stm32/stm32_adc.c and stm32_pwm.c:  Fix some bits
	  that should have been cleared in a register.  From Martin Lederhilger
	  (2013-10-24).
	* configs/olimex-stm32-p207 and other files:  Support for the Olimex
	  STM32 P207 board added by Martin Lederhilger (2013-10-24).
	* arch/arm/src/sama5/sam_adc.c, sam_tc.c and sam_tc.h:  Hook in the
	  timer/counter logic so that it can driver periodic ADC sampling
	  (2013-10-24).
	* configs/freedom-kl25z/src/Makefile:  Only build kl_wifi.c if
	  CONFIG_WL_CC3000 is selected.  From Alan Carvalho de Assis
	  (2013-10-24).
	* configs/sama5d3x-ek/src/sam_adc.c:  Integrate support for the
	  apps/examples/adc into the SAMA5D3x-EK configuration (2013-10-24).
	* include/nuttx/fs/ioctl.h and arch/arm/src/sama5/sam_adc.c:  Add
	  and ioctl command that can be used to trigger ADC/DAC conversion
	  (2015-10-25).
	* configs/spark:  Spark configuration updated by David Sidrane
	  (2013-10-25).
	* drivers/wireless/cc3000 and include/nuttx/wireless/cc3000:
	  CC3000 driver update from David Sidrane (2013-10-25).
	* arch/arm/src/sama5/chip/sam_isi.h:  Camera interface register
	  definitions added (2013-10-26).
	* audio/ and include/nuttx/audio/audio.h:  Updated audio subsystem
	  from Ken Pettit (2013-10-27).
	* drivers/audio/ and include/nuttx/audio/vs1053.h:  Updated
	  VS1053 driver from ken Pettit (2013-10-27).
	* configs/mikroe-stm32f4/: Updated configuration for the
	  Mikroe STM32F4 board from Ken Pettit (2013-10-27).
	* arch/arm/src/stm32/stm32_spi.c:  DMA-related fixes from Ken
	  Pettit (2013-10-27).
	* sched/sched_releasetcb.c: Fix a cornercase:  If sched_releasetcb()
	  is called as part of a failed pthread startup before the flags
	  field in the TCB has been initialized, then a crash occurs.
	  Pointed out by David Sidrane (2013-10-27)
	* arch/arm/src/sama5/sam_adc.c:  ADC now works in all implemented
	  modes:  single channel or multiple channel with sequencer support.
	  software trigger or timer trigger;  ADC channel interrupts or
	  DMA (2013-10-28).
	* nuttx/drivers/audio/vs1053.c and nuttx/include/nuttx/audio/audio.h:
	  Add logic to verify the audio sub-format.  From Ken Pettit (2013-10-28).

6.32 2013-12-07 Gregory Nutt <gnutt@nuttx.org>

	* configs/spark:  Spark configuration updated by David Sidrane
	  (2013-10-30).
	* drivers/wireless/cc3000 and include/nuttx/wireless/cc3000:
	  CC3000 driver updates from David Sidrane (2013-10-13).
	* arch/arm/src/sama5/chip/sam_ssc.h:  SSC register definition
	  header file (2013-10-30).
	* arch/arm/src/sama5/chip/sam_pwm.h:  PWM register definition
	  header file (2013-10-31).
	* drivers/mtd/mtd_partition.c: Fix erase block vs page block confusion.
	  From Ken Pettit (2013-10-31).
	* arch/arm/src/stm32/stm32_usbdev.c: On a failure to bind the class
	  driver, the driver reference was being nullified too soon.  This
	  caused an exception in usbdev_reset() later.  The driver reference
	  will be nullified later usbdev_unregister when the caller gets the
	  error.  From David Sidrane (2013-10-31).
	* drivers/mtd/mtd_config.c and include/nuttx/configdata.h:  Add a container
	  for an MTD device that can be used to provide a simple, lightweight
	  interface to configuration data storage that resides on some storage
	  media that is wrapped as an MTD device.  From Ken Pettit (2013-11-1).
	* configs/mikroe-stm32f4:  Now uses /dev/config for configuration data
	  storage.  From Ken Pettit (2013-11-1).
	* arch/ stack management functions:  Extension and standardization of
	  stack debug logic.  Now includes coloration of the IDLE and interrupt
	  stacks as well as the heap.  Suggested by David Sidrane (2013-11-1).
	* configs/spark/usbmsc:  Add spark USB MSC configuration.  From David
	  Sidrane (2013-11-1).
	* fs/fat/fs_fat32util.c:  In one error return case, the error return
	  value was not being set, making the failure look like success. From
	  David Sidrane (2011-10-1).
	* drivers/usbdev/usbmsc.c and usbmsc_scsi.c:  pthread_join() does not
	  work if called from a different task group than the pthread.  This
	  is correct behavior, but a problem.  The correct solution would be
	  configure the USB MSC thread to a task, however, this workaround
	  from David Sidrane plugs the hole for now (2013-11-1).
	* drivers/mtd/mtd_config.c:  Reduce configuration header size.  From
	  Ken Pettit (2013-11-1).
	* drivers/mtd/sst25.c:  Improved write performance by fixing a bug
	  that prevented operation in the faster write mode.  The code did
	  not wait on the last write complete before issuing the WRDI  The
	  loop in general failed to wait on the fist 2 bytes after the
	  SST25_AAI if the next 2 were FF FF, then it would reissue the
	  address but not cancel the write. Reorganized to always wait for
	  completion after and address with data write and on any data
	  write so  that the device is complete before WRDI is sent.  From
	  David Sidrane (2013-11-2).
	* configs/sama5/src/sam_can.c:  Add CAN initialization logic
	  and fix a data alignment problem (2013-11-3).
	* drivers/mtd/mtd_config.c:  Updated configuration driver from
	  Ken Pettit (2013-11-4).
	* configs/sim/configdata:  MTD configuration driver unit test for
	  the simulation platform.  From Ken Pettit (2013-11-4).
	* configs/mikroe-stm32f4/fulldemo: Configuration updated by Ken
	  Pettit (2013-11-4).
	* arch/arm/src/stm32/stm32_usbdev.c:  Correct EP0 state handling
	  logic when buffers larger than the EP0 packet size are sent.
	  Also add support for decoded USB trace strings.  From David
	  Sidrane (2013-11-5).
	* drivers/usbdev/cdcacm.c, composite.c, usbmsc.c:  uninitialization
	  logic cause re-use of a stale pointer.  Changed to a two pass
	  uninitialization for the case of the composite driver:  Memory
	  resources are not freed until the second uninitialization pass.
	  From David Sidrane (2011-11-5).
	* arch/arm/src/sama5/sam_pwm.c and .h:  Add PWM driver for SAMA5
	  untested on initial checkout (not even incorporated in to build
	  system) (2013-11-6).
	* arch/arm/src/sama5/Make.defs and Kconfig:  SAMA5 PWM driver now
	  incorporated into build and configuration system.  Builds with
	  no errors (2013-11-6).
	* configs/sama5d3x-ek:  Add support for the PWM test for the
	  SAMA5D3x-EK board (2013-11-6).
	* arch/arm/src/sama5/sam_pwm.c and .h: SAMA5 PWM driver is now
	  functional (2013-11-7).
	* include/nuttx/audio/i2s.h:  First cut at an I2S interface
	  definition.  This initial definition is sparse will will
	  probably evolve significantly (2011-11-7).
	* arch/arm/src/sama5/sam_ssc.c and .h:  Skeleton and build setup
	  for a forthcoming SSC (aka I2S) driver for the SAMA5.  The
	  initial check-in is just the SAMA5 SPI driver gutted and hacked
	  to use the I2S interface.  More coming (2013-11-7).
	* arch/arm/src/stm32 and arch/arm/include/stm32:  Added support for
	  the STM32F429.  From Ken Pettit (2013-11-7).
	* configs/stm32f429i-disco:  Support for the STM32F429I-Discovery
	  board from Ken Pettit (2013-11-7).
	* arch/arm/src/stm32/stm32_usbdev.c:  The long outstanding bug
	  involving the handling of OUT SETUP commands has been fixed in
	  the STM32 F1 USB device driver by David Sidrane (2013-11-7).
	* configs/spark/composite/cdc-acm.inf:  Windows CDC/ACM driver
	  provided by David Sidrane (2013-11-7).
	* configs/spark/usbserial.c:  Add an apps/examples/usbserial
	  configuration for the Spark.  From David Sidran (2013-11-7).
	* arch/arm/src/sama5/sam_ssc.c and .h:  First cut of SAMA5
	  SSC/I2S driver is code complete (2013-11-9).
	* arch/arm/src/stm32 (numerous files):  OTG FS device and host
	  drivers extended so that they can support either the OTG FS
	  peripheral or the OTG HS peripheral (in FS mode).  This was
	  done as a quick way to get USB support on the STM32F429 which
	  has only OTG HS.  From Ken Pettit (2013-11-10).
	* configs/stm32f429i-disco:  Add support for the usbnsh and
	  usbmsc configurations using the OTG HS peripheral in FS mode.
	  From Ken Pettit (2013-11-10)
	* drivers/audio/i2schar.c:  A simple character driver to support I2S
	  accesses.  This driver in its current state is intended only to
	  support I2C testing and would not be appropriate to used for any real
	  driver application. (2013-11-10).
	* arch/arm/src/kl/kl_pwm.c and .h:  PWM driver for the Freescale
	  Kinetis KL family from Alan Carvalho de Assis (2013-11-10).
	* configs/freedom-kl25z:  Add PWM support.  From Alan Carvalho de Assis
	  (2013-11-10).
	* drivers/audio/vs1053:  VS1053 worker thread stack size is now
	  configurable and assigned a name via pthread_setname_np(). From Ken
	  Pettit (2013-11-10).
	* libc/audio/lib_buffer.c:  Moved audio/buffer/c to libc/audio/lib_buffer.c.
	  This file was moved because it contains buffer management functions
	  that must be available to audio applications.  If it was left in the
	  audio/ directory then it would not be available to applications in the
	  NuttX Kernel build (2013-11-10).
	* arch/arm/src/sama5/sam_ssc.c and Kconfig:  Add configurable support
	  for SSC loopback mode (2013-11-10).
	* include/nuttx/audio/i2s.h, arch/arm/src/sama5/sam_ssc.c, and
	  drivers/audio/i2schar.c:  Improved I2S interface design:  Simplified
	  audio buffer queuing (2013-11-10).
	* arch/arm/src/sam34 and arch/arm/include/sam34:  Basic support for
	  the Atmel SAM4E family.  From Mitko (2013-11-11).
	* libc/audio/lib_buffer.c:  Remove unused apb_prepare() function
	  (2013-11-11).
	* arch/arm/src/stm32:  Added header files and driver framework for the
	  STM32F429 LTDC framebuffer driver.  From Ken Pettit (2013-11-11).
	* configs/sama5d3x-ek/src/sam_i2schar.c: Add support for the
	  apps/examples/i2schar test (2011-11-11).
	* arch/arm/src/sama5/sam_ssc.c:  I2S loopback test finally works
	  (2013-11-11).
	* fs/procfs:  Add a little, primitive procfs file system. (2013-11-13).
	* fs/binfs/README.txt:  Add a README file for binfs (2013-11-13).
	* arch/arm/src/stm32/Kconfig:  Add missing setup of CAN TSEG1 and
	  TSEG2 values.  From Martin Lederhilger (2013-11-14).
	* arch/arm/src/sama5/sam_pck.c and .h:  Add support for programmable
	  clock outputs (2013-11-14).
	* configs/ea3131/nsh:  Converted to use kconfig-frontend tools
	  (2013-11-14).
	* arch/arm/src/lpc31: Create configuration and build support for a
	  forthcoming USB host controller driver (2013-11-14).
	* arch/arm/src/lpc31/lpc31_ehci.c:  First cut at an EHCI driver
	  tailed for the LPC31 (2013-11-14).
	* fs/fs_mount.c:  SMART FS must be included in the conditional
	  compilation for the set of file systems that require block
	  drivers.  From Daniel Palmer (2013-11-15).
	* tools/mkconfig.c:  SMART FS must be included in the conditional
	  compilation for the set of writable file systems.  Noted by
	  Daniel Palmer (2013-11-15).
	* arch/arm/src/sama5/sam_nand.c and .h:  Framework for an MTD driver
	  that will provide raw access to NAND (2013-11-15).
	* configs/sama5d3x-ek/src/sam_nandflash.c:  Provides board-specific
	  memory controller initialize for NAND flash (2013-11-15).
	* include/nuttx/mtd/mtd.h:  Move include/nuttx/mtd.h to
	  include/nuttx/mtd/mtd.h where it will, hopefully, soon be joined by
	  other MTD-related header files (2013-11-15).
	* drivers/mtd/mtd_onfi.c and include/nuttx/mtd/onfi.h:  Add shared
	  NAND routines for use with ONFI compatible NAND FLASH devices
	  (2013-11-15).
	* configs/ea3131/src/up_usbhost.c:  Board-specific USB host support
	  for the EA3131 board (2013-11-15).
	* drivers/mtd/mtd_nand.c, include/nuttx/mtd/nand.h, nand_config.h,
	  and nand_scheme.h:  Further NAND support (still incomplete).
	  (2013-11-16).
	* drivers/mtd/mtd_modeltab.c:  Further NAND support (still incomplete).
	  (2013-11-16).
	* drivers/mtd/mtd_nandmodel.c: More NAND support (same story).
	  (2013-11-16).
	* drivers/mtd/mtd_rawnand.c and include/nuttx/mtd/nand_raw.h: More
	  NAND support (2013-11-17).
	* drivers/mtd/mtd_nandscheme.c:  More NAND support (2013-11-17).
	* include/nuttx/mtd/nand_ecc.h: More NAND (2013-11-17).
	* drivers/mtd/hamming.c and mtd_nandecc.c and
	  include/nuttx/mtd/hamming.h:  Beginning of NAND software ECC
	  calculations. (2013-11-18).
	* configs/olimex-lpc-h3131:  Add support for the Olimex LPC-H3131
	* board.  Does not yet boot (2013-11-18).
	* arch/arm/src/lpc31xx/lpc31_ehci.c:  Add USB host trace support
	  (2013-11-19).
	* configs/olimex-lpc-h3131/include/board.h, src/lpc31_boot.c,
	  lpc31_leds.c, lpc31_usbhost.c, and lpc_h3131.h:  Add GPIO
	  support for LED1/2 and for USB power enable and overcurrent
	  detection (2013-11-19).
	* configs/olimex-lpc-h3131/nsh/defconfig:  Drop loops-per-msec
	  count for the Olimex-LPC-H3131.  It seems to be about 25% as
	  fast as the Embedded Artists EA3131 at the same clocking.
	  (2013-11-19).
	* arch/arm/src/arm/up_cache.S and cache.h:  More cache management
	  functions (2013-11-20).
	* configs/olimex-lpc-h3131/src/Makefile:  Add SDRAM support.
	  Untested and probably needs some fine tuining (2013-11-21)
	* fs/smartfs/README.txt:  Add README for SMARTFS file system.  From
	  Ken Pettit (2013-11-23)
	* tools/mkctags.sh:  A script for creating ctags from Ken Pettit
	  (2013-11-23)
	* configs/sama5d3x-ek/src/sam_nand.c:  Add support for "auto-mounting"
	  NAND MTD block driver or NXFFS file system (2013-11-25).
	* include/mtd/mtd.h:  Packed the geometry structure so that it can
	  support larger erase block sizes without increasing the size of
	  the geometry structure (2013-11-27).
	* drivers/mtd/sst25xx.c:  Add another SST25 SerialFlash driver.  This
	  one differs from sst25.c because it supports larger SST25 parts:  In
	  the larger parts support page write instead of byte/word writes like
	  the smaller parts.  From Ken Pettit (2013-11-28).
	* drivers/mtd/smart.c: Fixes a minor bug with SMART partition number
	  reporting (that would only be seen if both partition support and
	  multi-root directory support are enabled at the same time).  From Ken
	  Pettit (2013-11-28).
	* arch/arm/src/stm32/chip/stm32f40xxx_gpio.h: Add support for GPIOK and
	  GPIOJ.  From Ken Pettit (2013-11-28).
	* configs/stm32f429i-disco/extflash, Kconfig, include/board.h,
	  src/stm32f429i-disco-internal.h, up_nsh.c, and up_spi.h:  Add a
	  configuration and board support for an external SST25 FLASH.  From Ken
	  Pettit (2013-11-28).
	* fs/fs_inode.c: The inode semaphore must be re-entrant.  Here is the
	  re-entering path that I found:  (1) USB host connects to FLASH drive
	  and creates /dev/sda, (2) /dev/sda is mounted, (3) FLASH drive is
	  removed but /dev/sda is not destroyed because there is still a
	  reference on the device because of the mount, (4) umount() is called,
	  taking the inode semaphore, now the driver tries to destroy the block
	  driver by calling unregister_blockdriver().  But (5)
	  unregister_blockdriver() also takes the inode semaphore causing a
	  deadlock if the inode semaphore is not re-entrant. (2013-11-28).
	* configs/viewtool-stm32f107:  Add board support for the ViewTool
	  STM32F103/F107 board with the STM32F107VCT6 installed.  Initial
	  check-in is the unverified board-support framework only
	  (2013-11-30).
	* configs/viewtool-stm32f107/src/stm32_buttons.c and stm32_leds.c:
	  Add support for LEDs an buttons on the ViewTools STM32F107 board
	  (2013-11-30).
	* fs/nxffs/nxffs_initialize.c:  First of probably several changes for
	  NAND FLASH.  NAND can report read errors because of bad ECC.  Logic
	  in NXFFS must account for it and not just throw in the towel every
	  time a read fails (2013-11-30).
	* drivers/mtd/mtd_nand* and arch/arm/src/sama5/sam_nand.c:  NAND
	  accesses now work (at least with software ECC and now DMA).  Still
	  lots of testing to be done (2013-11-30).
	* fs/nxffs/nxffs_dump.c: Do not abort on a read error.  Just not
	  the error and continue.  Otherwise, we would not be able to dump
	  NAND FLASH (2013-11-30).
	* fs/nxffs:  All read error logic has been revisited and modified in
	  most places.  If we are using NAND, then read errors probably mean
	  that the block that was read contains uncorrectable bit errors.  In
	  this case, we cannot just give up and abort the operations.  Rather,
	  we need to treat read error like normal bad blocks in order to work
	  with NAND (2013-12-2).
	* fs/nxffs/Kconfig and nxffs_initialize.c:  Make the start up scan of
	  the media option. It just takes to long! (2013-12-02).
	* drivers/mtd/mtd_nand.c: Fix a typo in calculation of page number
	  (2013-12-02).
	* drivers/mtd/README.txt:  New README file (2013-12-04).
	* arch/arm/src/lm/lm_start.c:  Don't initialize .data if not running
	  from FLASH (2013-12-05).
	* fs/fat/fs_configfat.c: Fix a typo in the FAT16 formatting logic.
	  Was this ever able to format a FAT16 volume? (2013-12-05).
	* drivers/mtd/mtd_nand.c:  Check if block number is within range at
	  the top of the loop not the bottom.  Otherwise, we will do a bogus
	  transfer with the out-of-range block before we test it (2013-12-05).

6.33 2014-01-30 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/include/a1x and src/a1x:  Directory structure to support
	  the Allwinner A10.  Not much there on the initial check-in
	  (2013-12-7).
	* configs/pcduino-a10:  Directory structure for the pcDuino board.  This
	  board is based on the Allwinner A10 (2013-12-7).
	* arch/arm/src/a1x/a1x_boot.c and chip/a1x_intc.h:  More A10 logic
	  (2013-12-8).
	* arch/arm/src/a1x/a1x_irq.c:  A10 interrupt handling logic (partial)
	  (2013-12-8).
	* drivers/video/ov2640.c: An OV2640 camera driver that will be used to
	  verify the SAMA5D3x-EK ISI peripheral (2013-1209).
	* sama5d3x-ek/ov2640 and src/sam_ov2640.c.  Board logic to test the SAMA5D3
	  ISI peripheral usign the OV2640 camera (2013-12-9).
	* arch/arm/src/a1x/chip/a1x_uart.h:  A10 UART register definition
	  header file (2013-12-9).
	* include/nuttx/video/fb.h:  Move fb.h to include/nuttx/video/
	  (2013-12-10).
	* include/nuttx/video/rgbcolors.h:  Move rgbcolors.h to include/nuttx/video.
	  (2013-12-10).
	* include/nuttx/fs/smart.h:  Move smart.h to include/fs/smart.h
	  (2013-12-10).
	* include/nuttx/fs/ramdisk.h:  Move ramdisk.h to include/fs/ramdisk.h
	  (2013-12-10).
	* arch/arm/src/a1x/chip/a1x_pio.h and a10_piocfg.h:  PIO register
	  definition header files (2013-12-10).
	* arch/arm/src/a1x/a1x_pio.c and .h:  Support for PIO configuration
	  (2013-12-11).
	* libc/misc/lib_match.c:  Pattern matching logic extended to handle
	  matches to sets of characters and ranges of character values.  From
	  Ken Pettit (2013-12-12).
	* fs/procfs, drivers/mtd, fs/smartfs, includes/nuttx/fs, .. to many
	  files to list:  Extensive changes by Ken Pettit to extend procfs/
	  functionality.  Includes some incomplete changes related to
	  SmartFS (2013-12-12).
	* configs/stm32f429i-disco: Add support for procfs/ MTD part names.
	  From Ken Pettit (2013-12-12)
	* arch/arm/src/a1x/chip/a1x_timer.h:  Timer register bit definitions
	  (incomplete on initial check-in) (2013-12-12).
	* lbc/time/lib_strftime.c: Need null-termination on the string
	  generated by strftime().  From Max Holtzberg (2013-12-12).
	* sched/nanosleep.c and include/time.h:  Add nanosleep() (2013-12-12).
	* libc/unistd/lib_sleep.c and lib_usleep.c.  Move sleep() and
	  usleep() from sched/sleep.c and usleep.c to libc/unistd.  These
	  functions now just call nanosleep(). (2013-12-13).
	* syscall/ and include/sys/syscall.h:  Remove sleep and usleep
	  system calls.  Add nanosleep system call (2013-12-13).
	* arch/arm/src/a1x/a1x_timerisr.c:  Timer interrupt handler for the
	  A10 (2013-12-13).
	* arch/arm/src/a1x/a1x_config.h:  Header file to keep track of A10
	  configuration decisions (2013-12-13).
	* arch/arm/src/a1x/a1x_lowputc.c, a1x_serial.c, and a1x_serila.h:
	  Beginning of an A10 serial driver.  From Alan Carvalho de Assis
	  (2013-12-13).
	* fs/procfs/procfs_utils.c:  Move some re-usable functions out of
	  fs_procfsproc.c into a utility file (2013-12-14).
	* fs/procfs/fs_procfsuptime.c:  Supports /proc/uptime (2013-12-14).
	* graphics/nxconsole/nxcon_font.c:  Fix a typo that causes a compile
	  error when CONFIG_NXCONSOLE_BPP < 8.  From Librae (2013-12-15).
	* fs/procfs/fs_procfsproc.c:  procfs now shows information about
	  the group that each thread belongs:  Like parents, group member,
	  open file, and open sockets (2013-12-15).
	* fs/procfs/fs_procfsproc.c:  Now shows task stack information
	  (2013-12-15).
	* arch/arm/src/armv7-a/cp15.h:  Review A9 TRM and updated CP15
	  register definitions accordinglyg (2013-12-16).
	* Makefile.unix: Now has supports qconfig and gconfig targets.
	  These tools will use the Qt and GTK versions of the kconfig-
	  frontends configuration tools (if you built them) (2013-12-16)
	* arch/arm/src/armv7-a/arm_head.h:  Fix some errors in the cache
	  invalidation logic (only seem to matter for Cortex-A8) (21-3-12-19).
	* Kconfig and all Make.defs files:  Add CONFIG_DEBUG_NOOPT.  Now
	  you can independently enable/disable debug symbols and optimization
	  (2013-12-20).
	* configs/README.txt and Documentation/NuttxPortingGuide.html:
	  Remove documentation of NuttX configuration variables.  Since
	  converting to the kconfig-frontend tools, the NuttX configuration
	  is now documented in the Kconfig files and summarized in the
	  autogenerated Documentation/NuttXConfigVariables.html file.
	  This old configuration variable documentation is now a liability
	  and, hence, was removed (2013-12-20).
	* arch/Kconfig, arch/arm/Kconfig, arch/arm/include/x/chip.h, and
	  and arch/arm/src/x/x_irq.c where x={kinetis, lm, lpc17xx, lpc43xx,
	  sam34, or stm32}:  Beginning of support for nested, high priority
	  interrupts.  Lots more still needs to be done (2013-12-21).
	* arch/arm/src/armv7-m/up_exception.S and arch/arm/src/x/x_vectors.S:
	  where  x={kinetis, lm, lpc17xx, lpc43xx, sam34, or stm32}: completes
	  the basic implementation of nested, high priority interreupts.
	  Still untested and need documentation (2013-12-21).
	* configs/stm3210e-eval/buttons: Converted to use kconfig-frontends
	  tools (untested) (2013-12-22).
	* configs/Kconfig, configs/viewtool-stm32f107/include/board-stm32f103vct6.h,
	  and /board-stm32f107vct6.h:  The viewtool board can now be configured
	  to support either the STM32F103VCT6 or the STM32F107VCT6 (2013-12-22).
	* configs/Kconfig, README.txt, viewtool-stm32f107/highpri, Kconfig,
	  README.txt, and src/stm32_highpri.c:  This is the initial framework
	  for a test of the high priority, nested interrupt logic.  Still
	  incomplete and does not yet run (2013-12-22).
	* arch/arm/src/armv7-m/ram_vectors.h and up_ramvec_initialize.c:
	  Correct alignment of the RAM vector table (2013-12-22).
	* Kconfig: Support configuration of interrupt controller debug output
	  (2013-12-22).
	* configs/viewtool-stm32f107/scripts:  Need to do some special things
	  in linking of the common vectors are used (2013-12-22).
	* arch/arm/include/*/irq*.h:  Add definition NR_VECTORS so that the RAM
	  vector logic can know how many vectors there are.  NR_IRQS is often
	  not equal to NR_VECTORS (2013-12-23).
	* arch/arm/src/*_vectors.S:  Standardize the name of the vector table
	  and the name of the common vector handling logic so that the MCU-
	  independent logic and work with these (2013-12-23).
	* configs/viewtool-stm32f107/scripts: Move the RAM vector tables to the
	  beginning of SRAM.  It seems to require this alignment.  Also, we
	  don't need different scripts for the CMNVECTOR case now that the vector
	  table has a common name.
	* arch/arm/src: armv-7/up_exception.S and xxx/xxx_vectors.S where
	  xxx={kinetis, lm, lpc17xx, sam34, and stm32}:  Modified register usage
	  when saving the context on the stack:  In order to handler nested
	  interrupts, the stack pointer must be used so that when it is
	  decremented, the contents on the stack are protected from the nested
	  interrupt handling (2013-12-23).
	* arch/Kconfig: The CONFIG_ARCH_INT_DISABLEALL feature is disabled (i.e.,
	  depends on EXPERIMENTAL).  That is because the current implementation
	  will not work because interrupts get disabled in the interrupt handler
	  too, defeating the nesting of interrupts.  The fix is easy: It just
	  needs more levels of priority of disabling interrupts vs interrupt
	  handling (2013-12-23).
	* configs/viewtool-stm32f107/src/stm32_highpri.c:  Improved debug output
	  (2013-12-23).
	* drivers/lcd/memlcd.c and include/nuttx/lcd/memlcd.h:  Support for the
	  Sharp Memory LCD from Librae (2013-12-23).
	* configs/maple/nx and src/:  Add support for a custom Sharp Memory
	  LCD on the Maple board.  From Librae (2013-12-23).
	* configs/viewtool-stm32f107/netnsh:  Add a NSH configuration that
	  supports networking with the DP83848C module installed (2013-12-25).
	* configs/viewtool-stm32f107/src/stm32_nsh.c, stm32_mmcsd.c, stm32_usb.c,
	  and stm32_usbmsc.c:  Lay out basic framework for USB and SD card
	  support.  Code is incomplete and has been neither built nor tested
	  (2013-12-25).
	* nuttx/arch/arm/src/stm32/Kconfig, chip/stm32f103vc_pinmap.h,
	  stm32f105vb_pinmap.h, and stm32f107vc_pinmap.h:  Fix configuration and
	  pin definition that would prevent building USB for the connectivity and
	  performance lines (2013-12-25).
	* stm32l15xxx_pinmap.h: Fix a typo in USB pin definitions (2013-12-25).
	* configs/viewtool-stm32f107:  Fix building of USB for F103 and F107.
	  F103 has device only; F107 has OTG FS (2013-12-25).
	* arch/arm/src/stm32/stm32f10xxx_rcc.c and chip/stm32f10xxx_rcc.h:  Add
	  clocking support for STM32F107 USB OTG FS (which does not work)
	  (2013-12-26).
	* configs/viewtool-stm32f107:  Updates to USB for F103 and USB OTG FS
	  for F107 (2013-12-16).
	* arch/arm/src/stm32/chip/stm32f3xxxx_pinmap.h:  Fix pin definition names
	  for SPI2 MOSI and MISO. Noted by Brian Webb (2013-12-27).
	* graphics/nxmu, nxsu, and nxglib and libc/nx, nxmu, and nxglib:  Massive
	  reshuffling of files with (hopefully) no logic changes.   This
	  reshuffling is necessary if we ever want to build graphics applications
	  as kernel builds.  There is still more today (NXTK and NXFONTS need to
	  be moved to libc as well) (2013-12-27).
	* Move libc/nx, nxmu, and nxglib to a new library, libnx.  The NX
	  graphics is not properly a part of libc (2013-12-28).
	* Move graphics/nxfonts to libnx/nxfonts (2013-12-28).
	* Move graphics/nxtk to libnx/nxtk (2013-12-28).
	* syscalls: Need to add sem_timedwait() (2013-12-28)
	* Move more files from graphics/nxmu to libnx/nxmu (2013-12-29).
	* graphics/nxmu/nx_start.c: NX server start-up wrapper function to
	  simplify starting the NX server from within the RTOS (2013-12-29).
	* configs/stm3240g-eval/kernel and configs/stm3240g-eval/scripts:  Port
	  kernel build logic from the STM32F4Discovery to the STM3240G-EVAL.
	  This will eventually support testing of the kernel mode NX server
	  (2013-12-29).
	* configs/stm3240g-eval/nxwm:  Converted to use the kconfig-frontend
	  tools (2013-12-29).
	* configs/stm3240g-eval/knxwm:  Add a kernel mode NxWM build
	  configuration (not yet verified) (2013-12-29).
	* Moved configs/stm3240g-eval/src/up_cxxinitialize.c to
	  apps/platform/stm3240g-eval/up_cxxinitialize.c:  Now it is available
	  in user-space in the kernel mode build (2013-12-29).
	* graphics/nxbe, nxsu, libnx/nxmu, and nxtk:  Need to be consistent with
	  which allocator is used in the different configurations.  Always uses
	  the user-space allocator because that one is required in certain
	  configurations (2013-12-30).
	* include/nuttx/kthread.h:  Move kernel thread definitions out of
	  os_internal.h so that the rest of the OS can start kernel threads as
	  well (2013-12-30).
	* configs/sim/mount/defconfig:  Converted to use kconfig-frontends
	  tools (2013-21-31).
	* configs/z16f2800100zcog/nsh:  Add a Z16F NSH configuration.  Does not
	  yet work (2014-1-1).
	* arch/arm/src/stm32/stm32_serial.c: Single-wire UART support from
	  Thomas Grubler (2014-1-2).
	* tools/configure.c and mkdeps.c:  Fixes for Windows build issues
	  from Max Holtzberg (2014-1-4).
	* configs/olimex-stm32-p107/nsh/Make.defs:  Add native Windows build
	  support for the Olimex STM32 P107.  From Max Holtzberg (2014-1-4).
	* Makefile.win:  Changes for native Windows build:  Fix creation of
	  a .version file if one does not exist.  Make sure that the APPDIR
	  environment variable is set before configuring.  From Max Holtzberg
	  (2014-1-4).
	* configs/viewtool-stm32f107/src/stm32_ssd1289.c:  Add support for
	  Viewtool SSD1289-based LCD (untested on initial checkin)  (2013-1-5).
	* arch/arm/include/syscall.h and armv7-a/syscall.h:  Add the syscall.h
	  header file needed for the Cortex-A architecture (2014-1-5).
	* arch/arm/src/a1x/a1x_serial.c:  Remove bad flow control logic.  Add
	  missing interrupt handling logic for UART4-7 (2014-1-6).
	* nuttx/tools/mkconfig.c: Cast size to unsigned in calculation of
	  CONFIG_RAM_END to avoid complains about integer overflow (2013-1-6).
	* nuttx/tools/mkconfig.c: Back out the last change, this causes
	  problems for assembly language.  How to prevent the integer over-
	  flow warnings? (2014-1-6).
	* arch/arm/src/a1x/a1x_serial.c: Handle BUSY interrupt (2014-1-6).
	* arch/arm/src/armv7-a/arm_head.S and arm_pghead.S:  Add more nop's
	  after enabling the MMU.  The cortex-a8 seems to need these
	  (2014-1-7).
	* arch/arm/src/a1x/a1x_serial.c: Correct handling of the BUSY
	  interrupt (2014-1-7).
	* include/sys/types.h:  Add a bogus rsize_t type (2014-1-7).
	* libc/stdio/lib_gets_s.c:  Add a quick'n'dirty implementation of
	  gets_s() which replaces gets() in C11 (2014-1-7).
	* libc/stdio/lib_fopen.c:  Add support for new C11 exclusive open
	  ("x") (2014-1-7)
	* include/threads.h:  First crude cut at a C11 threads.h header
	  file (just maps to pthreads) (2014-1-7).
	* libc/stdio/lib_libfgets.c:  Common implementation supports all
	  of the slightly different requirements of gets(), gets_s(), and
	  fgets() (2014-1-7).
	* arch/arm/include/stm32/chip.h and chip/stm32f103ze_pinmap.h:
	  various fixes for STM32F103ZE SPI3.  From Steve Redler IV
	  (2014-1-7).
	* graphics/nxsu/Make.defs:  Typo that crept into build in recent
	  NX reorganization.  Found by Steve Redler IV (2014-1-7).
	* graphics/nxsu/:  Another typo from the
	  recent NX reorganization from Steve Redler IV (2014-1-7).
	* graphics/nxbe/nxbe_closewindow.c, nx_close.c, nx_constructwindow.c,
	  nx_open.c, and nx_openwindow.c:  Needs to use kuzalloc and kufree,
	  not umm_zalloc and umm_free.  Additional typo in nx_constructwindow.c
	  (wnd should be hwnd). Also noted by Steve Redler IV (2014-1-7).
	* configs/viewtool-stm32f107/src/stm32_touchscreen.c (and other
	  files):  Add support for the XPT2046 touchscreen controller on
	  the Viewtool LCD module connected to the Viewtool STM32F103
	  board (2014-1-9).
	* libc/strings/lib_stpcpy.c:  Add stpcpy() (2014-1-9).
	* arch/arm/src/a1x/a1x_lowputc.c and a1x_serial.c:  Mystery
	  finally solved:  The A10 serial clock is the OSC24M clock.
	  Thanks to Alan Carvalho de Assis (2014-1-10)
	* binfmt/binfmt_loadmodule.c: Fix a memory leak (2013-1-11).
	* configs/stm3vldiscovery: Support for the STM32VL-Discovery board.
	  Contributed by Alan Carvalho de Assis (2014-1-12).
	* net/net_close.c, net/Kconfig, include/nuttx/net/net.h, and
	  include/sys/socket.h: Add support for the SO_LINGER socket option.
	  Extended from logic provided by Jason Jiang.  Enabled with
	  CONFIG_NET_SOLINGER.  At this point, it has only been verified that
	  the changes does not seem to do any harm (2014-1-13).
	* net/connect.c and net/uip/uip_callback.c: prevent tcp_connect
	  callback from being double freed.  From Max Holtzberg (2014-1-13).
	* net/Kconfig and include/nuttx/net/uip/uipopt.h: Add configuration
	  support for forthcoming TCP write buffering (2014-1-13).
	* net/net_send_buffered.c, net_send_unbuffered.c, and
	  uip/uip_tcpwrbuffer.c:  First set of changes to bring in Jason
	  Jiang's TCP write buffering logic.  Still not complete but
	  apparently harmless if not selected. (2014-1-13).
	* All of Jason Jiang's TCP write buffering logic is checked in.
	  Unfortunately, it does not yet work (2013-1-14).
	* configs/px4fmu-v2_upstream:  Configuration for testing simple
	  configurations on the PX4FMU v2.  This version is incomplete
	  for the PX4 application and is not a replacement for the version
	  in the PX4 GIT repository.
	* fs/fat/fs_fat32.c: A correction to FAT cluster allocation from
	  Tridge via Lorenz Meier (2014-1-14).
	* net/net_clone.c:  If CONFIG_NET_TCP_WRITE_BUFFERS is selected,
	  then the socket-related write buffering information must copied
	  with the other cloned socket data (2014-1-14).
	* net/net_close.c:  If CONFIG_NET_TCP_WRITE_BUFFERS is selected,
	  then it is necessary to free the write buffer callback structure
	  when the socket is closed (2014-1-14).
	* fs/fat/fs_fat32.c:  Fix some root directory logic that was
	  conditionally done only for FAT 32.  Apparently this needs to
	  done for all FAT types.  From Tridge via Lorenz Meier
	  (2014-1-14).
	* arch/arm/src/armv6-m/up_doirq.c and armv7-m/up_doirq.c and all
	  implementations of up_maskack_irq() for all Cortex-M architectures:  Do
	  not disable and enable the IRQ on each interrupt.  Because (1)
	  interrupts are already disabled on interrupt entry, (2) this
	  interferes with controlling the IRQ interrupt setting from interrupt
	  handlers, and (3) up_disable_irq() does not work anyway so that this
	  has never done anything (2014-1-15).
	* All implementations of up_disable_irq() for all Cortex-M3 and M4
	  architectures:  To enable an interrupt on the Cortex-M3/4 CPU, you
	  need to set a bit in the ISER registet on the Cortex-M3/4 CPU, you
	  need to set a bit in the ISER register.  To disable the interrupt, you
	  need to set a bit in the ICER register.  Existing logic was trying to
	  disable interrupts by clearing the bit in the ISER register.  That will
	  not work; writing a '0' to the ISER register has no effect.  That
	  means that up_disable_irq() was doing nothing!  It turns out that that
	  is not really important because up_disable_irq() is not really used
	  for that purpose.  But some spurious STM32 ADC interrupts have been
	  reported to me and this turned out to be the cause in that case.  My
	  concern now that up_disable_irq() works is that there may now be
	  unmasked bugs that leave devices in the disabled state?  Thanks to
	  Manuel Stühn for the tip(2014-1-15).
	* libc: Move strtol(), strtoll, strtoul(), strtoull(), and strtod() from
	  libc/string to libc/stdlib where they belong (2014-1-16).
	* configs/Kconfig:  Board configuration sub-directory can now be
	  specified.  The default need not be used.  This is really only
	  useful when CONFIG_ARCH_BOARD_CUSTOM is selected and there is no
	  meaningful default sub-directory (2014-1-16).
	* configs/Kconfig:  Backed out the previous change for two reasons:
	  (1) it has a bad side effect in that the sub-directory setting
	  no longer tracks the board setting, and (2) you still can't
	  source the Kconfig file from the custom board directory (2014-1-16).
	* Makefile.unix, Makefile.win, and configs/Kconfig:  After thinking a
	  little harder, I re-implemented the backed-out custom configuration
	  feature.  The new version does not have bad side-effect (1) (but still
	  has bad side-effect (2)) (2014-1-16).
	* arch/x86/Kconfig and configs/qemu-i486/nsh/Make.defs and
	  ostest/Make.defs:  Add a configuration option to select the -m32
	  compiler option when building for a 32-bit target on a native 64-bit
	  compiler (2014-1-18).
	* include/ctype.h: Typo in macro name: iscntrl, not iscontrol (2104-1-17)
	* libc/unistd/lib_getopt.c:  If there are no arguments (argc == 1), then
	  getopt() will leave the optind variable in an undefined state (2014-1-20).
	* configs/olimex-stm32-p107:  Fails to build if SPI3 for UEXT is not
	  remapped.  From Max Holtzberg (2014-1-21).
	* Several network related files:  Changes from Max Holtzberg to improve
	  how network status is reported.  New controls to manage carrier
	  detect.  (2014-1-21).
	* configs/16z:  Add basic support for the 16z board. The 16z board is
	  based on the ZiLOG ZNEOZ16F2811AL20EG part.  See
	  https://github.com/toyaga/16z for further information (2014-1-22),
	* tools/Config.mk: 'cypath' must be called if we are using a Windows
	  native toolchain with the Cygwin 'make' to convert paths to proper
	  Windows paths.  From Richard Cochran (2014-1-23).
	* /arch/arm/src/Makefile: dependency directory list is now computed
	  from the VPATH.  From Richard Cochran (2014-1-23).
	* arch/arm/src/efm32 and include/efm32:  Basic support for the EFM3
	  processor family from Richard Cochran (2014-1-23).
	* configs/efm32-dk3650:  This is Energy Micro's development kit for
	  the Leopard Gecko MCU, which is an ARM Cortex-M3 device.  From Richard
	  Cochran (2014-1-23).
	* arch/arm/src/armv7-m/up_memcpy.S: Assembler changes with the gcc-47
	  distribution from ARM mean that we need to be explicit about branch
	  sizes; one or more of the wide branch opcodes results in bad table
	  branching.  From Mike Smith (2014-1-23).
	* Many files: renamed up_buttoninit() to board_button_initialize to
	  better conform to the naming standard.  Now ONLY prototypes in
	  include/nuttx/arch.h (2014-1024).
	* Rename up_buttons() to board_buttons() for the same reason (2014-
	  1-14).
	* Rename up_irqbutton() to board_button_irq() (2014-1-24).
	* Rename up_ledinit() to board_led_intialize() (2014-1-24).
	* Rename up_ledon() to board_led_on() and up_ledoff() to board_led_off()
	  (2014-1-24).
	* arch/x86/src/qemu-i486/gemu_head.S:  Patch from Matt Campbell
	  to fix 'Error: .size expression for idle_stack does not evaluate to
	  a constant" (2014-1-25).
	* arch/arm/include/efm32, arch/arm/src/efm32, and configs/efm32-dk360:
	  Removed all EFM32 support.  Not yet ready to be fielded (2014-1-27).
	* arch/arm/src/armv7-a/arm_head.S, sama5/sam_boot.c, and several other
	  files:  Now supports execution from NOR FLASH with .data and .bss in
	  SDRAM.  This was not possible prior to this because .bss and .data
	  were initialized before SDRAM was configured.  This logic is still
	  kind buggy. (2014-1-28).
	* arch/arm/src/armv7-a/arm_head.S and arm_pghead.S:  Back off to a
	  somewhat less efficient loop for initializing .data and .bss.  The
	  original, efficient logic violated the ARM C ABI.  It was okay when
	  called from boot logic, but not when called from C logic.  This fixes
	  bugginess reported on 2014-1-28. (2014-1-29).

7.1 2014-03-15 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/lm/lm_serial.c:  Fix cut'n'paste error that prevented
	  UARTS2-7 from being used with the LM4F120 Launchpad (2014-02-03).
	* configs/stm32f4discovery/src: Almost everything renamed to conform
	  to the ever-evolving naming standard (2014-02-03).
	* arch/arm/src/a1x/a1x_serial.c:  Had the same cut'n'paste error
	  that the LM4f120 Launchpad had (2013-02-03).
	* Documentation/NuttXCCodingStandard.html:  Add a coding standards
	  document.  Very boring stuff (2014-2-6).
	* Several changes to restore the native Windows build (2014-2-7).
	* arch/arm/src/lpc17xx/lpc17_usbhost.c: Fix an compilation error
	  that crept into the LPC17xx USB host driver.  What happened here?
	  (2014-2-9).
	* drivers/usbhost/usbhost_hidmouse.c and other files:  Add support
	  for a HID boot mouse device.  It compiles but is otherwise
	  completely untested on initial check-in (2014-2-9).
	* configs/olimex-lpc1766stk/src/lpc17_hidmouse.c and hidmouse: Add
	  support of a test of the USB HID mouse (2014-2-9).
	* drivers/usbhost/usbhost_hidmouse.c: The driver appears to be
	  functional.  But there are usability issues:  How do you use the
	  mouse with no cursor?  The HID mouse currently emulates a touchscreen
	  driver.  That would work in the long run for several reasons (see the
	  top-level TODO list for details) (2014-2-9).
	* include/nuttx/input/mouse.h and drivers/usbhost/usbhost_hidmouse.c:
	  Defined a mouse interface that is very similar to a touchscreen
	  interface, but allows reporting of all mouse buttons.  Also, unlike
	  touchscreen drivers, mouse drivers need to report positional data
	  with no button is pressed so that the mouse position can drive a
	  cursor (2014-2-10).
	* drivers/usbhost/usbhost_hidmouse.c, include/nuttx/input/mouse.h, and
	  include/nuttx/usb/hid.h:  Add support for a mouse wheel (2014-2-10).
	* drivers/lcd/mio283qt9a.c and include/nuttx/lcd/mio283qt9a.h:  Support
	  for the MIO283QT9A LCD.  From Toby Duckworth (2014-2-10).
	* configs/mikroe-stm32f4/src/up_mio283qt9a.c: The Mikroe STM32F4 can
	  now support the newer MIO283QT9A LCD. From Toby Duckworth (2014-2-10).
	* MANY files changes based on complaints from the tool CppCheck.  Several
	  latent bugs were fixed (and most likely some new typos were introduced)
	  (2014-2-10).
	* arch/arm/include/samd and src/samd:  Basic framework to support Atmel
	  SAMD20 Cortex-M0+ chips.  Initial check-in is incomplete; this is a
	  work in progress (2014-2-12).
	* configs/samd20-xplained:  Framework to support the Amtel SAMD20
	  Xplained Pro.  Initial check is just an unverified, rough port of
	  the SAM4L Xplained Pro configuration (2014-2-12).
	* arch/arm/src/stm32/stm32_serial.c:  Fix cloned typo:  FLOWCONTROL
	  vs FLOWCONROL (2014-2-14).
	* net/uip/uip_tcptimer.c: Back out a small part of the 6.33 write
	  buffering changed.  David G says that this causes problems in
	  connecting to a server (2014-2-15).
	* The basic SAMD20 Xplained Pro port is complete but still untested
	  (2014-2-16).
	* sched/task_terminate.c:  Always returns an error because the
	  return value was not being set correctly.  From Gosha (2014-2-18).
	* stm32f429i-disco/ostest-fpu:  OS test for FPU-enabled system from
	  David Alessio (2014-2-18).
	* Other misc changes to support FPU on STM32F429 Discovery from
	  David Alessio (2014-2-18)
	* stm32f429i-disco/src:  Files renamed to make more consistent
	  with current board file naming conventions (2014-2-18).
	* stm32 SPI: Disable SPI before changing CR1 register.  From David
	  Sidrane (2014-2-18).
	* stm32 TIM: Set CCMR when selecting timer channel.  From David
	  Sidrane (2014-2-18).
	* configs/spark: Board configuration updated by David Sidrane
	  (2014-2-19).
	* libc/stdio/lib_sscanf.c:  Bug fixes from David Sidrane (2014-2-18).
	* nuttx/drivers/wireless/cc3000 and nuttx/include/nuttx/wireless/cc3000:
	  Numerous updates to the CC3000 driver from David Sidrane (2014-2-18).
	* nuttx/configs/stm3240g-eval/webserver: Converted to use the
	  kconfig-frontends tools by Alan Carvalho de Assis (2014-2-18).
	* configs/mbed:  All mbed configurations have been converted to use
	  the kconfig-frontends tools (unverified) (2014-2-18).
	* fs/fs_opendir.c, fs_readdir.c, et al: Modified so that errors
	  will not be reported if you attempt to list a empty pseudo-directory
	  (2014-2-19).
	* fs/fs_rmdir.c: 'rmdir' can now be used to remove empty directories in
	  the pseudo-filesystem such as might be left after umounting a
	  file system (2014-2-19).
	* fs/fs_mkdir.c: 'mkdir' can now be used to create empty directories in
	  the pseudo-filesystem (2014-2-19).
	* drivers/lcd/mio283qt9a.c: Bug fix from Toby Duckwork (2014-2-19).
	* fs/fs_rename.c: 'rename' can now be used to rename nodes in the
	  pseudo-filesystem (2014-2-19).
	* arch/arm/src/samd/sam_sercom.c:  Move some common SERCOM logic
	  from the USART-specific files to a share-able file where it can
	  also be used by SPI and I2C drivers (2014-2-19).
	* arch/arm/src/samd/sam_spi.c:  Add framework for a SAMD SPI driver.
	  The initial check-in is a crude port of the SAMA5 SPI driver with
	  a lot of missing logic (2014-2-19).
	* arch/arm/src/lm/lm_lowputc.c and lm_serial.c:  Several errors
	  are unmasked with UARTs > UART2 are enabled.  From Gosha (2014-2-19).
	* arch/arm/src/samd/sam_spi.c:  The SPI driver is code complete,
	  but untested (2014-2-20).
	* configs/olimex-lpc1766stck/ftpc:  Configuration convert to use
	  the kconfig-frontends tools by Alan Carvalho de Assis (2014-2-20).
	* fs/fs_mkdir.c: 'unlink' can now be used to remove things from the
	  pseudo-filesystem.  A new configuration option as been added:
	  CONFIG_DISABLE_PSEUDOFS_OPERATIONS that effectively can be set
	  back out these recent changes in rmdir, mkdir, unlink, and rename
	  for operations on the pseudo-filesystem (2014-2-20).
	* Kconfig:  Add an option to select default values for configuration
	  variables based upon whether you want a smaller footprint or more
	  features.  CONFIG_DEFAULT_SMALL is used in sched/Kconfig and
	  fs/Kconfig and in apps/.  It turns out this this is not very useful
	  if you are modifying existing configurations because then the
	  defaults do not apply (2014-2-20).
	* arch/arm/src/sam34/chip/sam4e_vectors.h:  Add vector definitions
	  for the SAM4E (2014-2-21).
	* arch/arm/src/sam34/chip/sam4e_memorymap.h:  Add SAM4E memory map
	  (2014-2-21).
	* arch/arm/src/sam34/sam4e_gpio.h, sam4e_periphclks.h, and chip/sam4e_pio.h:
	  Add PIO support for the SAM4E (2014-2-21).
	* configs/stm3220g-eval/nsh/defconfig: Converted to use kconfig-frontends
	  by Alan Carvalho de Assis (2014-2-10)
	* configs/*/defconfig: Comment out all CONFIG_APPS_DIR settings.  These
	  should not be set in the default configurations because we don't know
	  where the apps/ directly will reside until configuration time (2014-2-21).
	* arch/arm/src/sam34/chip/sam4e_pinmap.h:  SAM4E pin multiplexing
	  definitions (2014-2-21).
	* sched/sched_processtimer.c and fs/procfs/fs_procfscpuload.c:  Add
	  logic to measure and calculate the CPU load percentage.  From David
	  Alessio (2014-2-22).
	* sched/sched_processtimer.c, sched_cpuload.c, fs/procfs/fs_procfscpuload.c,
	  and fs_procfscpuload.c:  CPU load logic extended to keep counts on each
	  thread.  The per-thread CPU is now reported in the procfs under
	  <pid>/loadavg (2014-2-23).
	* include/stddef.h:  ptrdiff_t is defined twice in stddef.h and also in
	  sys/types.h.  stdef.h is the correct location for the definition, but
	  it includes sys/types.h so, at least for now, the definition will be
	  retained in sys/types.h (2014-2-25).
	* net/net_close.c:  Fix one place where the connection reference count
	  was not being decremented.  This is really a cosmetic change BUT
	  when CONFIG_DEBUG_NET is enable, it will cause assertions (2014-2-25).
	* arch/arm/src/sama5/sam_adc.h:  Fix typos in the SAMA5 ADC register
	  definition header file (2014-2-26).
	* arch/arm/src/sam34:  The port to the SAM4E is code complete (2014-2-16).
	* include/cxx: Fix some bad idempotence definitions in header files
	  (2014-2-27).
	* sched/sched_cpuload.c:  Change calculation of the total count when the
	  time constant related delay elapsed.  The total count is now always
	  guaranteed to add up to 100% (excepting only truncation errors)
	  (2014-2-27).
	* fs/procfs/fs_procfscpuload.c and fs_procfsproc.c:  Remove the newline
	  at the end of the percentage so that the returned strings can be
	  printed on the same line as other values (2014-2-27).
	* sched/Kconfig, sched_cpuload.c, and nuttx/sched/sched_processtimer.c:
	  An asynchronous, "external" clock may now be used to drive the CPU
	  load calculations for more accurate load measurements when needed
	  (2014-2-27).
	* configs/*/defconfig:  If CONFIG_NSH_LIBRARY=y then set CONFIG_NSH_READLINE=y
	  otherwise the CLE will be selected by default the next time that
	  make menuconfig is used (2014-2-28).
	* include/cxx/cstdbool:  Ignore _Bool8 if CONFIG_C99_BOOL8=y. (2014-2-28).
	* configs/*/defconfig:  Set CONFIG_DEFAULT_SMALL on all tiny MCU
	  configurations (2014-2-28).
	* configs/stm3240g-eval/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-2-28).
	* configs/*/ostest:  Removed most OS test configurations (except in a few
	  cases where there was some good argument to retain the ostest
	  configuration) (2014-2-28).
	* configs/stm3240g-eval/nsh2: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/stm3220g-eval/nsh2: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/stm3210e-eval/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/stm3210e-eval/nsh2: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/lincoln60/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/lpcxpresso-lpc1768/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/nucleus2g/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/vsn/nsh: Configuration converted to use the kconfig-frontends
	  tools (2014-3-1).
	* configs/mirtoo/nsh: Configuration converted to use the kconfig-frontends
	  tools (2014-3-1).
	* configs/pic32-starterkit/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/pic32-starterkit/nsh2: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1)
	* configs/pic32mx7mmb/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/ubw32/nsh: Configuration converted to use the kconfig-frontends
	  tools (2014-3-1).
	* configs/sim/nsh2: Configuration converted to use the kconfig-frontends
	  tools (2014-3-1).
	* configs/lm3s6432-s2e/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1)
	* configs/lm3s8962-ek/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/eagle100/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/stm32f4discovery/src/Makefile: Fix typo: stm32_pwm.c not
	  stm32_psm.c.  Noted by Max Kriegleder (2014-3-1).
	* configs/lpc4330-xplorer/nsh Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	*  configs/ea3152/ostest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-1).
	* configs/stm3210e-eval/RIDE, nxlines, and nxtext:  Remove some old
	  style configurations that are not worth converting to use the
	  kconfig-frontends tools (2014-3-2).
	* configs/stm3210e-eval/nx: Configuration converted to use the
	  kconfig-frontends tools (2014-3-2).
	* configs/mirtoo/nxffs: Configuration converted to use the
	  kconfig-frontends tools (2014-3-2).
	* arch/arm/src/lpc2378/Kconfig: Create Kconfig file for the LPC2378.
	  Change most configuration variable names to avoid collisions with
	  other platforms  (2014-3-2)
	* configs/olimex-lpc2378/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-2)
	* configs/olimex-lpc1766stk/nx: Configuration converted to use the
	  kconfig-frontends tools (2014-3-2)
	* configs/lpcxpresso-lpc1768/nx: Configuration converted to use the
	  kconfig-frontends tools (2014-3-2)
	* configs/lm3s8962-ek/nx: Configuration converted to use the
	  kconfig-frontends tools (2014-3-2)
	* configs/sim/nx: Configuration converted to use the kconfig-frontends
	  tools (2014-3-2)
	* configs/c5471evm/nettest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/olimex-strp11/nettest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/eagle100/nettest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3).
	* configs/ez80f910200zco/nettest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3).
	* configs/stm3220g-eval/nettest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3).
	* configs/stm3240g-eval/nettest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3).
	* configs/sim/nettest: Configuration converted to use the kconfig-frontends
	  tools (2014-3-3).
	* configs/ez80f910200zco/dhcpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3).
	* configs/stm3220g-eval/dhcpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3).
	* configs/stm3240g-eval/dhcpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3).
	* configs/lpcxpresso-lpc1768/dhcpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/olimex-lpc1766stk/usbmsc: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/nucleus2g/usbmsc: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/lpcxpresso-lpc1768/usbmsc: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/stm3210e-eval/usbmsc: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/hymini-stm32v/usbmsc: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/ea3131/usbmsc: Configuration removed.  It could not possible
	  useful because there is no MCI driver for the EA3131 (2014-3-3)
	* configs/mcu123-lpc214x/usbmsc: Configuration converted to use the
	  kconfig-frontends tools (2014-3-3)
	* configs/teensy/nettest: Configuration converted to use the kconfig-frontends
	  tools (2014-3-3).
	* configs/*/dhcpd:  Add missing DHCPD configuration settings (2014-3-3).
	* configs/stm32f4discovery/pm: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/stm3210e-eval/pm: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/stm3240g-eval/nxconsole: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/stm3210e-eval/nxconsole: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/stm3240g-eval/telnetd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/stm3220g-eval/telnetd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* fs/fat/fs_fat32.c:  Fix an error in the FAT logic that can cause file
	  corruption.  The error conditions are rare and only seen with very
	  large files.  From Andrew Tridgell.  This replaces a previous, partial
	  fix for the same problem (2014-3-4).
	* configs/hymini-stm32v/usbserial: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/ea3131/usbserial: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/mcu123-lpc214x/usbserial: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/olimex-lpc1766stk/thttpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/lpcxpresso-lpc1768/thttpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/eagle100/thttpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/eagle100/httpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/ez80f910200zco/httpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/c5471evm/httpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/eagle100/nxflat: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/sim/touchscreen: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/sim/pashello: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/sim/nx11: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/ez80f910200zco/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/ez80f910200zco/poll: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/olimex-lpc1766stk/slip-httpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-4)
	* configs/c5471evm/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/compal_e99/nsh_compalram: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/compal_e99/nsh_highram: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/mcu123-lpc214x/composite: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/olimex-strp711/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/amber/hello: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/micropendous3/hello: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/teensy/hello: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/teensy/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* arch/avr/Kconfig, avr32/Kconfig, at32uc3/Kconfig, atmega/Kconfig, and
	  at90usb/Kconfig:  Reshuffle lots of AVR-related configuration names to
	  make space for AVR32.  Populate AVR32 Kconfig file (2014-3-5).
	* configs/avr32dev1/ostest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/avr32dev1/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/ntosd-dm320/nettest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/ntosd-dm320/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/ntosd-dm320/poll: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/ntosd-dm320/thttpd: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/ntosd-dm320/udp: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/ntosd-dm320/uip: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* arch/Kconfig, arch/arm/Kconfig, configs/ea3131/Kconfig,
	  configs/ea3131/pgnsh/defconfig, configs/ea3131/src/up_fillpage.c,
	  configs/ea3152/Kconfig, nuttx/configs/ea3152/src/up_fillpage.c,
	  include/nuttx/page.h, and tools/cfgdefine.c:  Add configuration
	  settings for the on-demand paging option (2014-3-5).
	* configs/ea3131/pgnsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/qemu-i486/ostest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* configs/qemu-i486/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-5)
	* Many files:  Use common naming for all buildroot toolchains
	  (2014-3-5).
	* Many files:  Use common naming for rest of the toolchains (2014-3-5).
	* configs/ne64badge/ostest and demo9s12nec64/ostest: Configurations
	  converted to use the kconfig-frontends tools (2014-3-5)
	* fs/nxffs/nxffs_open.c: Missing call to nxffs_freeentry() causes
	  memory leak.  From Lzyy (2014-3-6).
	* fs/nxffs/nxffs_stat.c: Looks like stat() has the same problem as
	  the one reported by Lzyy (2014-3-6).
	* configs/skp16c26/ostest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/us7032evb1/ostest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/us7032evb1/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/mx1ads/ostest: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/pjrc-8051: Configuration converted to use the kconfig-frontends
	  tools (2014-3-6)
	* configs/rgmp/arm/default: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/rgmp/arm/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/rgmp/x86/default: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/rgmp/x86/nsh: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/rgmp/x86/helloxx: Configuration converted to use the
	  kconfig-frontends tools (2014-3-6)
	* configs/rgmp/x86/cxxtest: Configuration converted to use the
	  kconfig-frontends tools.  This completes the conversion of all
	  configurations to the newer format (2014-3-6)
	* Removed the CONFIG_NUTTX_NEWCONFIG setting from every defconfig
	  file (2014-3-6).
	* The legacy, manual configuration is no longer supported by the
	  NuttX build system.  Only the newer configurations generated by
	  the kconfig-frontends tools will generate viable NuttX
	  configurations.  All board configurations in the NuttX source tree
	  have been converted to use the newer configuration, but if you have
	  some older style configurations for you board, you will need to
	  convert those configurations to use the kconfig-frontends tools.
	  See http://www.nuttx.org/doku.php?id=wiki:howtos:convertconfig for
	  some guidelines (2014-3-6).
	* drivers/serial/Kconfig:  Correct an error introduced in this file
	  in very recent commits (2013-3-6).
	* configs/*sam*:  Refresh all SAM* configurations with the latest
	  Kconfig files (2014-3-6).
	* configs/stm32f4discovery:  Refresh all configurations (except
	  winbuild) with the latest Kconfig files (2014-3-6).
	* configs/viewtool-stm32f107:  Refresh all configurations with the
	  latest Kconfig files (2014-3-6).
	* configs/16z, mikroe-stm32f4, olimex-lpc1766stk, px4fmu-v2_upstream,
	  sim, and stm32f429i-disco: Refresh all configurations (2014-3-6).
	* Documentation/NuttShell.html:  Update per recommendations from Max
	  Kriegleder (2014-3-6).
	* configs/pic32-starterkit, pic32mx7mmb, stm3210e-eval, stm3220g-eval,
	  and stm3240g-eval:  Refresh all configurations with the latest
	  Kconfig files (2014-3-7).
	* configs/qemu-i486/src:  Files renamed to correspond with current
	  thinking about naming (2014-3-8).
	* arch/x86/src/qemu/qemu_keypad.c and qemu_vga.c:  New QEMU keyboard
	  and VGA drivers from Lizhuoyi (2014-3-8).
	* configs/olimex-lpc2378/src:  Files renamed to correspond with current
	  thinking about naming (2014-3-8).
	* arch/arm/src/lpc2378/lpc23xx_i2c.c and lpc23xx_spi.c:  I2C and SPI
	  drivers for the LPC23xx from Lizhuoyi (2014-3-8).
	* arch/arm/include/tiva and src/tiva:  The old lm/ directories were
	  renamed tiva/ to better support new products coming down the pipe
	  from TI (2014-3-8).
	* arch/arm/include/tiva, src/tiva, and configs/:  All files and all
	  all functions beginning with the name lm_ changed to tiva_
	  (2014-3-8).
	* configs/: Refresh all LM3/4/Tiva configurations (2014-3-9).
	* arch/arm/src/tiva/chip/tm4c_pinmap.h:  Add pin multiplex definitions
	  for the TM4C123 (2014-3-9).
	* arch/arm/src/tiva/chip/tm4c_memorymap.h:  Add memory map for the
	  TM4C123 (2014-3-9).
	* arch/arm/src/tiva/:  Add GPIO and SYCONTROL register bit definitions
	  for the TM4C123 (2014-3-10).
	* configs/tm4c123g-launchpad:  Add basic board support for the
	  TM4C123G-Launchpad (2014-3-10).
	* configs/sam4e-ek:  Add basic board support for the SAM4E-EK board.
	  More work is needed.  The initial commit is little more than the
	  SAM3U-EK with name changes (2014-3-10).
	* configs/spark: Refresh all spark configurations (2014-3-11).
	* arch/arm/src/tiva/chip/tm4c_memorymap.h:  Fix typos reported by
	  Daniel Pereira de Carvalho (2014-2-12).
	* arch/arm/src/sam34/sam_emac.c:  Add an Ethernet MAC driver for the
	  SAM4E.  The initial checkin is essentially the SAMA5D3 EMAC driver
	  with naming changes as appropriate (2014-3-12).
	* arch/arm/src/sam34/sam_cmcc.c:  Add logic to manage the Cortex-M
	  Cache Control block.  Untested on initial check-in (2014-3-12).
	* arch/arm/src/sam34/sam_emac.c:  Fix EMAC pin configuration (was been
	  set up for RMII instead of MII).  Now the driver EMAC appears to be
	  functional (2014-3-13).
	* configs/sam4e-ek/nsh:  Networking support is now enabled by default
	  in the NSH configuration (2014-3-13).
	* arch/arm/src/sam34/sam_spi.c:  Backported the SAMA5 SPI driver to
	  the SAM3/4 architecture.  The SAMA5 version supports both multiple
	  SPI peripherals as needed by the SAM3A and SAM3X and also supports
	  DMAC (but not PDC).  The initial commit is untested and may very
	  well have (temporarily) broken SPI for the SAM3/4/ family (2014-3-13).
	* configs/sam4e-ek/src/sam_at25.c and sam_hsmci.c:  Added support for
	  the AT25 serial FLASH.  Restructured the logic that registers the
	  HSMCI block driver (2014-3-13).
	* arch/arm/src/sam34/sam_dmac.c and sam_spi.c:  Fixes to DMA in general
	  and to SPI in particular (2014-3-14).
	* configs/sam4e-ek/nsh:  DMA-based SPI and a FAT file system on the
	  AT25 Serial FLASH are now supported by default in the NSH configuration
	  (2014-3-14).
	* sched/nanosleep.c:  Fix a missing call to re-enable interrupts.  From
	  Jason Jiang (2014-3-15).

7.2 2014-04-29 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/sam34/sam_udp.c and .h:  Add a USB full speed device
	  driver (UDP) for the SAM4E (2014-3-17).
	* Documentation/NuttxPortingGuide.html:  Typo fixes from Vijay Kumar
	  (2014-3-18).
	* arch/arm/Kconfig:  Improved documentation of the use of the
	  BASEPRI register from Vijay Kumar (2014-3-19).
	* include/nuttx/i2c.h:  More typo fixes from Vijay Kumar (2014-3-19).
	* arch/Kconfig and *_assert.h:  Add a configuration option to enable
	  dumping of the USB trace buffer on assertion (2014-3-19).
	* drivers/usbdev/Kconfig, arch/arm/src/sam34/Kconfig, and
	  drivers/usbdev/usbmsc_scsi.c:  If DCD can support queuing of stall
	  requests, then the USB MSC stall work around delays are not necessary
	  (2014-3-20).
	* net/netdev_findbyaddr.c:  Skip network devices that are in the
	  "down" state.  It does not make sense to consider an address match
	  with a "down" device.  From Brennan Ashton (2014-3-20).
	* configs/sam4e-ek/usbnsh:  Add a NSH configuration that uses the
	  NSH console (2014-3-22).
	* arch/arm/src/stm32/stm32_eth.c:  Add IGMP hashing support.  From
	  Manuel Stühn (2014-3-24).
	* net/netdev_ioctl.c and uip/uip_input.c:  IGMP-related bug fixes
	  from Manuel Stühn (2014-3-24).
	* arch/arm/src/sam34:  Add missing HSCMI configuration settings to
	  Kconfig; update naming to include SAM34_ (2014-3-24).
	* configs/sam4e-ek/include/board.h:  Update HSMCI timing to use the
	  CLKODD bit (2014-3-24).
	* drivers/include/mtd/Kconfig, sector512.c, and include/nuttx/mtd/mtd.h:
	  Add a new MTD driver that can be used to contain another driver and
	  force its apparent sector size to be 512 bytes (2014-3-24).
	* arch/arm/src/sam34/sam_lowputc.c sam_serial.c:  Fix a mysterious
	  multithreading bug that can lock up the serial port (2014-3-14).
	* drivers/usbdev/Kconfig, usbmsc.c, usbmsc.h, and usbmsc_scsi.c:
	  Redesign threading module used with the USB MSC driver.  It was using
	  pthreads before and these were changed to a kernel thread.  The reason
	  for this has to do with task grouping:  A pthread is a memory of the
	  group of the task that started it.  A kernel thread is independent of
	  the task that started in (other than knowing it as the parent).  This
	  allows me to remove so kludge logic to "deparent" the pthread on
	  startup (2014-3-25).
	* tools/astyle.sh:  A code formatting tool from Lorenz Meier.  This
	  tool should do a better job than the old tools/indent.sh tool
	  (2014-3-26).
	* arch/arm/src/sam_hsmci.c and sam_spi.c:  Add support to invalidate
	  cached memory if the CMCC is enabled (not yet tested, 2014-3-26).
	* arch/arm/src/sam_spi.c:  Add logic to handle SPI word widths > 8
	  (also untested on initial checkin, 2014-3-26).
	* configs/sam4e-ek:  All configurations updated to run with 120MHz
	  CPU speed and with the CMCC enabled.  Calibrated delay loop
	  (2014-3-26).
	* drivers/lcd/Kconfig:  Add missing configuration for the MIO283QT-9A
	  LCD.  Reported by Toby Duckworth (2014-3-27).
	* arch/arm/include/sama5/chip.h and arch/arm/src/sama5/Kconfig:  Add
	  support for the SAMA5D36 (2014-3-28).
	* libc/strings/lib_strncpy.c:  Change ordering of test and copy.  Logic
	  would have failed if n=0; one byte was always copying before testing
	  for the end of the copy.
	* nuttx/configs/sama5d3-xplained/:  Add a board support configuration
	  for the Atmel SAMA5D3 Xplained board.  The initial check in is not
	  finished. For example, it still builds to run out of NOR FLASH but
	  the SAMA5D Xlpained has no NOR FLASH (2013-4-28).
	* arch/arm/src/sama5/sam_pmc.c and .h:  Add functions to calculate
	  PLLACK, PCK, and MCK frequencies given the main clock frequency
	  (2014-3-29).
	* configs/sama5d*/include/board.h, board_sdram.h, and other files:
	  When booting from SDRAM, we need to query the PMC registers (using
	  the functions in sam_pmc.c) to determine the MCK, PCK, etc.  We assume
	  that the MCK input clock is well known main crystal oscillator
	  frequency (2014-3-29).
	* configs/sama5d3x-ek:  Change all configuration names to board-
	  specific names so that this are no name collisions with other
	  boards that have similar configuration variables (2013-3-30).
	* configs/nuttx/compiler.h:  Add macro UNUSED() that can be used
	  to eliminate warnings about variables that are set to values
	  that are not used (2014-3-30).
	* arch/arm/src/sama5/sam_hsmci_clkciv.c:  Remove HSCMI-related
	  functions that did not belong in sam_pmc.c and give them their
	  own file (2014-3-30).
	* arch/arm/src/sama5/sam_boot.c:  Fix some backward conditional
	  compilation (2014-3-30).
	* libc/stdio/lib_sccanf.c:  Fix a counting error in the return
	  value from sscanf().  Noted by kfrolov.  Also, sscanf() should
	  return EOF if no values were converted (2014-3-30).
	* include/time.h and sched/clock_settime(): Add support for
	  CLOCK_REALTIME.  From Macs N (2014-3-31).
	* libc/stdio/lib_ferror.c, lib_fread.c, lib_libfflush.c,
	  lib_libfread.c, and lib_libfwrite.c:  Finish incomplete support
	  for ferror().  From Macs N (2014-3-14).
	* libc/stdio/lib_ftell.c:  Fix a logic error in ftell().  It was
	  simply using the file offset and did not take into account data
	  buffered in memory.  From Macs N (2013-3-31).
	* Add CONFIG_CLOCK_MONOTONIC that case used to disable CLOCK_MONOTONIC
	  for a smaller footprint (2013-3-31).
	* sched/Kconfig:  Menu has gotten too long.  And another layer of
	  menuing in order to simplify this layer (2014-3-31).
	* arch/arm/src/sama5_boot.c:  Fix double mapping of SDRAM when executing
	  out of SDRAM.  In this case, the SDRAM was already mapping in
	  arm_head.S (2014-3-31).
	* arch/arm/src/sama5/chip/sam_dbgu.h:  Add SAMA5D3 DBGU definition
	  header file (2014-3031).
	* arch/arm/src/sama5/sam_dbgu.c and .h:  Add support for the SAMA5D3
	  DBGU (2014-4-1).
	* configs/sama5d3-xplained/nsh:  Configurations now use the DBGU for
	  the serial console (instead of USART1) (2014-4-1).
	* libc/stdio/lib_sccanf.c:  Use stroul() vs strol() with %u format
	  otherwise, range of values is restricted because of sign bit
	  from kfrolov (2014-4-2).
	* arch/arm/src/sama5/sam_boot.c, sam_irq.c, chip/sama5d3x_memorymap.h:
	  When running from SDRAM, vectors must lie in SRAM (2014-4-2).
	* arch/arm/src/armv7-a/arm_head.S and cache.h:  On start-up, make
	  certain that the MMU and caches are disabled (probably un-necessary)
	  (2014-4-2).
	* arch/arm/src/sama5/sam_boot.c:  If we have to copy vectors, then
	  make sure to clean the DCache to be sure that the copied vectors are
	  in the physical RAM (2014-4-2).
	* arch/arm/src/sama5/sam_irq.c:  After we modify the AXI MATRIX, make
	  sure to invalidate all caches and TLBs (probably un-necessary)
	  (2014-4-2).
	* arch/arm/src/sama5/sam_irq.c: Set the VBAR register to zero.  If
	  were started by a bootloader (vs. a RESET), then the VBAR register
	  may not be in its reset state (zero, 2014-4-3).
	* arch/arm/src/sama5/sam_boot.c, sam_irq.c, and chip/sama5d3x_memorymap.h:
	  When booting from SDRAM, don't relocated vectors to ISRAM.  Instead,
	  just set the VBAR register to address of the vectors in SDRAM.
	* arch/arm/src/sama5/sam_clockconfig.c: BMS Fixed to match what the HW
	  does.  From David Sidrane (2014-4-3).
	* arch/arm/src/sama5/Kconfig, sam_boot.c, andsam_clockconfig.c:  On some
	  hardware, reconfiguring the PLL while executing out of NOR FLASH causes
	  crashes.  This was fixed by David Sidrane by implementing RAM functions.
	  The killer code is copied and executed from ISRAM and the crash is
	  avoided (2014-4-3).
	* configs/sama5d3-xplained/Kconfig and include/board*.h;
	  configs/sama5d3x-ek/Kconfig and include/board*.h:  Add support for
	  528MHz CPU clock (2014-4-3).
	* arch/arm/src/sama5/Make.defs:  Fix a build error that occurs when
	  only USB device tracing is enabled (2014-4-4).
	* Documentation/UsbTrace.html:  Add some discussion of the USB monitor
	  (2014-4-4).
	* nuttx/arch/arm/src/armv7-a/mmu.h:  Bufferable bit did not do what
	  I thought it was going to do.  Result was the NOR FLASH accesses
	  were very slow (2014-4-3).
	* arch/arm/src/sama5/sam_udphs.c:  Fix a case where received status
	  was not being cleared, causing OUT SETUP commands to fail (2014-4-6).
	* arch/arm/src/tiva/tiva_syscontrol.c:  Add logic for TM4C125GXL based
	  on logic from Daniel Carvalho with modifications.  I think the
	  LM4F120 may have broken before as well(?).  In any event, the LM4F120
	  also works well with this change (2014-4-7).
	* Back out part of 610e2aa0c224e2936fe8009ef4a2351ce607067a: Need to
	  be able to select USB console devices when there is no /dev/console
	  enabled. Noted by Librae (2014-4-8).
	* configs/*/defconfig:  Increase the number of preallocated watchdogs
	  in all configurations that use networking or USB (2014-3-9).
	* include/nuttx/syslog/syslog.h and ramlog.h:  Move syslog.h and
	  ramlog.h to include/nutt/syslog (2014-4-10).
	* sched/errno_getptr.c and getpid.c:  Add some checks.  If these
	  functions are called early in initialization before the tasking
	  structures are initialized, they will not behave properly
	  (2014-4-10).
	* arch/arm/src/sama5/sam_twi.c: TWI data sending is fails to increment
	  the number of bytes transferred on first byte sent.  From David Sidrane
	  (2014-4-10).
	* configs/sama5d3x-ek/src: The red LED is controlled by PE24 which is
	  also the camera/ISI interface reset line.  So if the a camera is
	  installed, then we must avoid controlling the red LED or we inadvertently
	  also reset the camera module.  Noted by David Sidrane (2014-4-11).
	* arch/arm/src/stm32/stm32_usbhost.c/.h and stm32_otgfshost.c:  USB host
	  tracing added by Leo (2014-4-12).
	* arch/arm/src/sama5/sam_adc.c, sam_can.c, sam_emac.c, sam_gmac.c,
	  sam_ssc.c, and sam_twi.c:  If running from SDRAM, then BOARD_MCK_FREQUENCY
	  is not a constant and cannot be used in conditional compilation (2014-4-16).
	* drivers/lcd/mio283qt9a.c and include/nuttx/lcd/mio283qt9a.h:  Update the
	  MIO183QT-9A LCD driver to support reading from the LCD.  From Toby
	  Duckworth (2014-4-16).
	* arch/arm/src/stm32/chip/stm32f20xxx_pinmap.h:  Correct a mapping for
	  SPI MOSI pin.  From dlsitzer (2014-4-26).
	* arm/src/sama5/sam_clockconfig.c and common/up_internal.h: Move the
	  un-definitions of __ramfuncs__ from the .c file to the .h file or,
	  otherwise, the attribute will be applied differently for the prototype
	  and the function definition.  Sourceforge patch 38 from Luciano Neri
	  (2014-4-17).
	* arch/arm/src/sama5/sam_emac.c:  Add missing right parentheses.  This
	  introduced in the above change and is Sourceforge patch 39 from Luciano
	  Neri (2014-4-17).
	* configs/sama5dx-ek/include/board.h and sama5d3-xplained.h:  These files
	  reference type xcpt_t and so must include nuttx/irq.h.  This is
	  Sourceforge bug 25 submitted by Luciano Neri (2014-4-17).
	* arch/arm/src/stm32/stm32_otgfshost.c:  Some fixes related to low-speed
	  devices and interrupt endpoints from Leo (2014-4-17).
	* configs/stm32f4discovery/src/stm32_usb.c:  Add support to register
	  keyboard and mouse classes if so configured.  From Leo (2014-4-17).
	* include/nuttx/usb/usbhost:  Fix some USB HID-related conditional
	  compilation.  From Leo (2014-4-17).
	* drivers/usbhost/usbhost_hidmouse.c: Don't include NAKs from the device
	  in the error count.  From Leo (2014-4-17).
	* arch/arm/src/sam34/sam_irq.c:  Fix initialization of the default
	  priorities (2014-4-17).
	* arch/arm/src/kinetis/kinetis_irq.c, lpc17xx/lpc17_irq.c, and
	  tiva/tiva_irq.c:  Modify the logic to disables the interrupts and sets
	  the default interrupt priority so that it uses the ICTR to get the
	  number of interrupt lines/registers.  This is instead of using some
	  fixed number of initializations based a priori knowledge of the number
	  of interrupt lines in the MCU.  This logic is untested on some MCUs
	  on initial check-in0 (2014-4-17).
	* arm/src/lpc17xx/Kconfig and lpc17_ethernet.c:  The default interrupt
	  priority should be default, not the highest priority (2014-4-19).
	* configs/lpcxpresso-lpc1768: Refreshed all defconfig files (2014-4-19).
	* configs/olimex-lpc1766stk: Refreshed all defconfig files (2014-4-19).
	* configs/zkit-arm-1769: Refreshed all defconfig files (2014-4-19).
	* include/nuttx/binfmt/ieee695.h:  Beginning of header file for IEEE
	  695 OMF header file (2014-4-19).
	* arch/arm/include/stm32/chip.h and src/stm32/Kconfig:  Add support
	  for the STM401RE.  From Frank Bennett (2014-4-20).
	* README.txt, Documentation/README.html, configs/Kconfig and README.txt,
	  configs/nucleo-f401re:  Add support for the Nucleo-F401RE board.  From
	  Frank Bennett (2014-4-20).
	* arch/arm/src/sam34/sam_rtc.c/.h:  Port RTC driver from SAMA5 to
	  SAM3/4.  From Bob Doiron (2014-4-21)
	* arch/arm/src/sam34/sam4s_periphclks.h: Fix error in macros that
	  disable peripheral clocking.  From Bob Doiron (2014-4-21)
	* drivers/mmcsd/mmcsd_sdio.c/.h:  Misc improvements from Bob Doiron
	  (2014-4-21)
	* arch/arm/src/sam34/sam_hsmci.c and chip/sam_hsmci.h:  Extensions
	  from Bob Doiron needed to support PDC-based HSMCI DMA transfers
	  (2014-4-21).
	* configs/sam4s-xplained-pro:  Support for the SAM4S Xplained Pro
	  board from Bob Doiron (2014-4-21).
	* configs/sam4s-xplained-pro: Added card detect (kind of broken
	  still); added proc/vfat mounting during init to save some typing.
	  From Bob Doiron (2014-4-21).
	* configs/sam4s-xplained-pro: Boost PLLA to 240MHz to allow USB. From
	  Bob Doiron (2014-4-21).
	* arch/arm/src/sam34/sam_wdt.c/.h:  Add watchdog driver.  From Bob
	  Doiron (2014-4-21).
	* nuttx/configs/sam4s-xplained-pro:  Add board-specific watchdog
	  timer support.  From Bob Doiron (2014-4-21).
	* drivers/timer.c and include/nuttx/timer.h:  Timer "upper half"
	  driver and lower half interface definition from Bob Doiron
	  (2014-40-22).
	* arch/z16/src/z16f/z16f_espi.c:  Add ZNEO ESPI driver (2014-4-24).
	* arch/arm/src/stm32/stm32_sdio.c:  The dmaflight method must
	  be conditioned on CONFIG_SDIO_PREFLIGHT.  Noted by Pelle
	  Windestam (2014-4-25)
	* configs/nucleo-f401re:  Removed bogus references to the MPU
	  (2014-4-25).
	* arch/z16/src/z16f_timerisr.c:  Fix calculation of timer
	  reload and prescaler.  The timer frequency was way too fast
	  (2014-4-25).
	* arch/arm/src/stm32/stm32_otgfsdev.c and others: Sourceforge
	  Ticket #26.  up_prioritize_irq should not be called if
	  CONFIG_ARCH_IRQPRIO is not defined (2014-4-25).

7.3 2014-06-25 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/sama5/sam_clockconfig.c:  Needed function sam_pmcwait()
	  is needed when UDPHS, EHCI, or OHCI is configured but may not be
	  compiled in due to insufficient conditional logic.  From Luciano Neri
	  (SourceForge patch #40) (2014-4-29).
	* arch/arm/include/stm32/chip.h, src/stm32/Kconfig, stm32_allocateheap.c,
	  configs/nucleo-f401re/nsh/defconfig, and scripts/ld.script:  Numerous
	  changes, most correcting memory usage on the Nucleo-F401RE (2014-4-30).
	* /drivers/mtd/w25.c: Extended by Mark Whitehorn to support the 8Mbit
	  W25Q80BV part (2014-4-30).
	* configs/sam4s-xplained-pro:  Update LED control logic from Bob Doiron
	  (2014-4-30).
	* drivers/timer.c and include/nuttx/timer.h: Enhanced timer interface
	  from Bob Doiron (2014-4-30).
	* arch/arm/src/sam34/Kconfig and sam_tc.c: Enhanced timer/counter driver
	  from Bob Doiron (2014-4-30).
	* configs/sam4s-xplained-pro/Kconfig, nsh/defconfig, and src/sam_tc.c:
	  The SAM4S Xplained Pro now uses the extended timer/counter features.
	  From Bob Doiron (2014-4-30).
	* include/nuttx/arch.h and sched/os_internal.h:  If the CPU load
	  measurements are being driven by an external clock, then the prototype
	  for sched_process_cpuload() must be available in include/nuttx/arch.h
	  (2014-4-30).
	* Documentation/NuttShell.html and many defconfig files:  The alternate
	  console device CONFIG_NSH_CONDEV must not be defined unconditionally.
	  This causes errors when using Telnet sessions.  This was solved by
	  adding CONFIG_NSH_ALTCONDEV: CONFIG_NSH_ALTCONDEV enables or disables
	  the feature then, if enabled, CONFIG_NSH_CONDEV provides the alternative
	  console device name (2014-5-5).
	* arch/arm/src/sam34/sam_rtt.c/.h:  RTT driver from Bob Doiron.  Also
	  added high resolution RTC emulation using the RTT for the sub-second
	  counter (2014-5-5).
	* configs/sam4s-xplained-pro:  Clean-up of LED usage and also some
	  integration of new timer features.  From Bob Doiron  (2014-5-5).
	* drivers/timer.c and include/nuttx/timer.h:  Timer driver updates from
	  Bob Doiron (2014-5-5).
	* binfmt/symtab_findorderedbyname.c:  Fix an error in the symbol search
	  function.  Noted by Pelle Windestam (2014-5-6).
	* arch/arm/src/stm32/stm32f40xxx_rcc.c and configs/nucleo-f401re/include/board.h:
	  The Nucleo-F401RE has no on-board crystals and, hence, needs to run
	  with the PLL input from the on-chip HSI clock (2014-5-6).
	* arch/arm/src/armv7-a/arm_memcpy.S:  This is the same optimized memcpy()
	  function that Mike Smith brought in for the ARMv7-M with minor tweaks
	  by David Sidrane to work with the ARMv7-A (2014-5-6).
	* binfmt/libpcode, pcode.c, include/nuttx/poff.h, and binfmt/pcode.h:
	  Framework to support Pascal P-Code as a binary format.  At present this
	  logic is incomplete and really nothing more than a thought experiment
	  to determine the feasibility of the P-code binary format (2014-5-7).
	* drivers/sensors/Make.defs:  Correct build dependency.  Sourceforge
	  ticket #41 from Kosma Moczek (2014-5-8).
	* drivers/serial.c, include/nuttx/serial.h, arch/arm/src/stm32/stm32_serial.c
	  and minor updates to all other drivers using the serial interface:  Add an
	  rxflowcontrol method to the serial interface to better support RX flow control.
	  From Jussi Kivilinna (2014-5-8).
	* arch/arm/include/stm32 and src/stm32:  Add support for the STM32152 and
	  STM32162 Medium+ density parts (plus miscellaneous other improvements to
	  the original STM32151 logic).  From Jussi Kivilinna and Sami Pelkonen
	  (2014-5-8).
	* binfmt/binfmt_dumpmodule.c, binfmt_loadmodule.c, binfmt_unloadmdoule.c,
	  builtin.c, elf.c, nxflat.c, pcode.c, and include/nuttx/binfmt/binfmt.h:
	  Extend the binfmt interface to handle error conditions where format-specific
	  binfmt clean-up is needed in the event of error conditions.  This is needed
	  by the P-Code binfmt (2014-5-8).
	* binfmt/libpcode, pcode.c, include/nuttx/poff.h, and binfmt/pcode.h:
	  Now uses apps/interpreters/prun and is basically functional.  More work
	  is needed because (1) it is too coupled with apps/ and (2) will not work
	  with CONFIG_NUTTX_KERNEL (2014-5-9).
	* arch/arm/src/stm32/stm32_i2c.c:  Bring in PX4 fix for I2C in very high
	  noise environments or with rogue perpipherals.  Taken from the PX4 commit
	  099b2017ccfa0fc7696f168db2a0c2e13fe5edbc by Tridge here:
	  https://github.com/PX4/NuttX (2014-5-10).
	* include/nuttx/video/rgbcolors.h:  Fix typo in several macros: RBG -> RGB.
	  (2014-5-12).
	* drivers/mtd/ramtron.c: Add support for Fujitsu MB85RS1MT part.  From
	  Charles Ash (2014-5-12).
	* configs/sam4e-ek/src/sam_ili9325.c:  Add an LCD driver for the SAM4E-EK
	  board.  Untested on initial check-in (2014-5-13).
	* configs/sam4e-ek/src/sam_ads7843e.c:  Add a touchscreen driver for the
	  SAM4E-EK board.  Untested on initial check-in (2014-5-13).
	* arch/arm/src/stm32/stm32_i2c_alt.c: Add an alternative I2C implementation
	  for the STM32 F03 that works around errata in that part.  From Patrizio
	  Simona (2014-5-14).
	* arch/arm/src/sam34/sam_gpio.c:  Fix some SAM4E compiler errors when
	  CONFIG_DEBUG_GPIO is enabled (2014-5-15).
	* sched/sig_mqnotempty.c:  Test for a valid signal number is inverted; this
	  function could not have been working correctly???  From eero.nurkkala
	  (2014-5-20).
	* arch/arm/src/stm32/stm32_lowputc.c:  Fix error in conditional
	  compilation. From Sami PelKonen (2014-5-20).
	* arch/*/src/* (several files):  Make sure that all references to
	  up_prioritize_irq() are conditioned on CONFIG_ARCH_IRQPRIO.  Problem
	  noted by Mike Smith (2014-05-20).
	* drivers/wireless/cc3000/Kconfig: Correct SPI mode for CC3000 is CPOL=0
	  CHPA=1. See http://processors.wiki.ti.com/index.php/CC3000_Serial_Port_Interface_(SPI)
	  From Jussi Kivilinna (2014-5-21).
	* drivers/wireless/cc3000/cc3000.c and include/nuttx/wireless/cc3000/include/cc3000_upif.h:
	  Configuration has CC3000_SPI_MODE settings but source uses
	  CONFIG_CC3000_SPIMODE. From Jussi Kivilinna (2014-5-21).
	* drivers/wireless/cc3000/cc3000drv.c: unsoliced_thread does
	  initialization of message queue, but main thread might block that
	  thread from running and use the uninitialized message queue. The main
	  thread must wait until unsolice_thread initializes the required
	  structures before proceeding. From Jussi Kivilinna (2014-5-21).
	* drivers/wireless/cc3000/cc3000.c: Fix build when POLL is enabled.
	  From Jussi Kivilinna (2014-5-21).
	* arch/arm/include/armv7-m/irq.h:  Change bne to bne.n in irqrestore()
	  (2014-5-22).
	* Many files: Convert all old-style variadic macros to the C99 form.
	  Recent GCC changes tightens up that behavior and can cause some problems
	  (at least for the IAR compiler for some reason).  See
	  https://gcc.gnu.org/onlinedocs/cpp/Variadic-Macros.html#Variadic-Macros.
	  Noted by Bob Grimes (2014-5-22).
	* configs/viewtool-stm32f107/nsh: Configuration refreshed (2014-5-23).
	* arch/arm/src/stm32/stm32_i2c_alt.c: Final driver from Max Kriegleder et al.
	  Reduces footprint and fixes a bug.  (2014-5-23).
	* tools/configure.sh:  In-place SED edit messes up permissions on windows.
	  From Hannes Delago (2014-5-25).
	* include/nuttx/mtd/mtd.h:  Needs forward reference to struct spi_dev_s.
	  (2014-5-25).
	* arch/arm/src/stm32/stm32_i2c.c and stm32_i2c_alt.c:  Back out PX4 fixes
	  that were reverted in the PX4 repositories (2014-5-25).
	* sched/Kconfig:  CONFIG_START_YEAR/MONTH/DAY are not required if the
	  RTC is enabled (2014-5-26).
	* arch/arm/src/stm32/stm32_rtcc.c:  Add retry logic to RTC initialization.
	  It sometimes takes longer for the RTC to initialize, at least as noted
	  on an F2 part.  From dlsitzer (2014-5-27).
	* libc/stdio/lib_snprintf.c:  If the size passed to snprintf() is zero,
	  then snprintf() must write nothing, but instead return the size of the
	  buffer needed to hold the entire string.  From Sami Pelkonen (2014-5-30).
	* net/arp:  Move arp related files from net/uip to net/arp.  Files renamed
	  with arp_ prefix (2014-5-30).
	* include/nuttx/net/arp.h and net/arp/arp_timer.c:  Moved
	  include/nuttx/net/uip/uip-arp.h to include/nuttx/net/arp.h; moved
	  net/net_arptimer to arp/arp_timer.c. (2014-5-30).
	* net/igmp:  Moved IGMP files from net/uip to net/igmp (2014-5-30).
	* net/icmp:  Moved ICMP files from net/uip to net/icmp (2014-5-30).
	* net/uip/uip_tcptimer.c:  NET: Notify upper layer when TIME_WAIT or
	  FIN_WAIT_2 timeout occurs. Otherwise connections possibly won't get
	  freed. From Max Holtzberg (2014-6-2).
	* TCP fallback allocation: Added all states in which the connections are
	  about to be closed.  Fallback mechanism is disabled when SO_LINGER is
	  enabled to prevent deadlocks in netclose_disconnect().  From Max Holtzberg
	  (2014-6-2).
	* configs/olimex-stm32_h405:  Support for the Olimex STM32 H405 board
	  contributed by Martin Lederhilger (2014-6-3).
	* net/arp/Make.defs:  Fix an error introduced recently in the net/ build
	  (2014-6-3).
	* net/iob:  Add generic I/O buffering.  Not currently used by anything.
	  (2014-6-4).
	* arch/arm/include/sama5 and arch/arm/src/sama5:  Basic framework to
	  support the SAMA5D4 family.  Incomplete on initial check-in (2014-6-3).
	* arch/arm/src/sama5/chip/sam_xdmac.h: Beginning of XDMAC register
	  definition header file (incomplete) (2014-6-4).
	* arch/arm/src/sama5/chip/sam_l2cc.h:  Add SAMA5D4 L2CC register definition
	  header file (incomplete on initial check-in) (2014-6-5).
	* drivers/usbdev/cdcacm.c:  Reset RX head to avoid resending last serial
	  data when USB cable disconnected/re-connected.  From Lizhuoyi (2014-6-6).
	* drivers/usbdev/pl2303.c:  Same change cloned for PL2303 (2014-6-6).
	* arch/arm/src/lpc2378:  Fix several typos. From Lizhuoyi (2014-6-6).
	* arch/arm/src/lpc17xx/lpc17_gpdma.c:  Fix an error when DMA is
	  started:  The read-modify-write fails when the DMA is started.  This
	  is because the value read is not the same as the value set (on write
	  it is the number of transfers to do; on read it is the number of
	  transfers completed).  From Lizhuoyi (2014-6-6).
	* configs/sama5d4-ek:  Initial board support for the SAMA5D4-EK board.
	  This initial check-in is basically the SAMA5D3-Xplained board support
	  with appropriate name changes (2014-6-6).
	* stm32/arch/arm/src/stm32_serial.c:  Handle configuration for the
	  case of 8-bit data with parity.  From Freddie Chopin (2014-6-11).
	* binfmt/libelf/elf.c:  Fix a compilation error when CONFIG_ELF_DUMPBUFFER
	  is defined.  From Pelle Windestam (2014-6-12).
	* net/, include/nutt/net, and include/netpacket:  Add support for "raw"
	  sockets.  From Lazlo Sitzer (2014-6-12).
	* arch/arm/src/sama5:  Add SAMA5D4 XDMAC driver.  Initial check-in is
	  just the DMAC driver with a few naming changes (2014-6-12).
	* configs/sama5d4x-ek/ramtest:  Add an SDRAM test configuration
	  (2014-6-14).
	* libc/stdio/lib_libsnoflush.c, lib_memsistream.c, and lib_memsostream.c:
	  Add support for seekable memory streams (2014-6-14).
	* libc/stdio/lib_rawsistream.c, and lib_rawsostream.c:  Add support for
	  seekable raw streams (2014-6-14).
	* libc/stdio/lib_stdsistream.c, and lib_stdsostream.c:  Add support for
	  seekable standard streams (2014-6-14).
	* configs/sam4x-xplained*/src/sam_buttons.c: Button interrupts not being
	  disabled after being detached.  (2014-6-15).
	* binfmt/binfmt_exec.c:  Fix a critical error in exec(); argv was not
	  being passed (2014-6-15).
	* arch/arm/src/sama5/sam_dmac.h:  Fix some critical typos in the SAMA5D3
	  DMA definitions (2014-6-17).
	* nuttx/net/net_send_unbuffered.c: Notify the device driver of the
	  availability of TX data.  From Daniel Lazlo Sitzer (2014-6-18).
	* net/net_close.c, net_send_unbuffered.c, socket.c, and uip_poll.c:
	  Various fixes for raw sockets from Daniel Lazlo Sitzer: (1) properly
	  free the socket in psock_close(), (2)  socket() returns failure when
	  there is no free socket/connection, and (3) Set number of bytes to
	  transmit is set in the uip_driver_s instance (2014-6-18).
	* net/tcp:  Move all TCP files from net/uip to net/tcp (2014-6-18).
	* net/udp:  Move all UDP files from net/uip to net/udp (2014-6-18).
	* net/pkt:  Move all AF_PACKET files from net/uip to net/pkt (2014-6-18).
	* net/Kconfig:  Add option to select CONFIG_NET_GUARDSIZE (2014-6-18).
	* net/net_send_buffered.c:  Add checks from buffer allocation failures.
	  from Max/Himax (2014-6-19).
	* tools/mkfsdata.pl:  Apparently, the trailing the 0x00 in http server
	  files is seen as a bug in javascript and images.  From Max/Himax
	  (2014-6-19).
	* net/ and include/nutt/net (many files):  Conversion of the TCP
	  write buffering logic to use I/O buffer chains (not tested on initial
	  check-in) (2014-6-22).
	* include/time.h and sched/clock_gettime.c:  Fix typo in conditional
	  compilation:  CONFIG_CLOCK_MONOTONIC vs. CLOCK_MONOTONIC.  From Manuel
	  Stühn (2014-6-23).
	* arch/avr/Kconfig and arch/avr/src/avr32/Kconfig:  Fix typos in
	  Kconfig files from Stefan Sperling (2014-6-23).
	* net/net_send_unbuffered.c:  Remove some spurious white space from
	  field selectors.  SourceForge ticket #42 (2014-6-23).
	* arch/arm/src/lpc17xx and configs/lpcexpresso-lpc1768:  Added support
	  for the lpcxpresso's rtc handler, adc, dac, timers, pwm and mcpwm
	  drivers.  From Max (himax) (2014-6-23).
	* net/tcp/Kconfig:  Cannot enable bother TCP write buffering AND raw
	  packet sockets.  This should not logically be the case, but is because
	  the implementations are presently too coupled.  The logic packet
	  socket logic in net/net_send_unbuffered.c needs to be broken out into
	  a separate file so that write buffered TCP and packet socket transfers
	  can co-exist (2014-6-23).
	* net/uip/uip_pktsend.c:  Move the logic that copies data into the
	  device buffer from net/net_send_unbuffered.c to net/uip/uip_pktsend.c.
	  This makes the packet socket design more consistent with TCP and UDP
	  (2014-6-23).
	* net/: Separate net/net_send_buffered.c and net/net_send_unbuffered.c
	  to net/tcp/tcp_send_buffered.c, net/tcp/tcp_send_unbuffered.c, and
	  pkt/pkt_send.c (2014-6-24).
	* include/net/if.h and /net/arp/arp_inout.c:  Suppress ARP requests on
	  data sent from packet sockets (2014-6-24).
	* include/nuttx/net/netconfig.h: Move include/nuttx/net/uip/uipopt.h to
	  include/nuttx/net/netconfig.h (2014-6-24).
	* include/nuttx/net/netdev.h: Move include/nuttx/net/uip/uip-arch.h to
	  include/nuttx/net/netdev.h (2014-6-24).
	* include/nuttx/net/tcp.h: Move include/nuttx/net/uip/uip-tcp.h to
	  include/nuttx/net/tcp.h (2014-6-24).
	* include/nuttx/net/udp.h: Move include/nuttx/net/uip/uip-udp.h to
	  include/nuttx/net/udp.h (2014-6-24).
	* include/nuttx/net/pkt.h: Move include/nuttx/net/uip/uip-pkt.h to
	  include/nuttx/net/pkt.h (2014-6-24).
	* include/nuttx/net/icmp.h: Move include/nuttx/net/uip/uip-icmp.h to
	  include/nuttx/net/icmp.h (2014-6-24).
	* include/nuttx/net/igmp.h: Move include/nuttx/net/uip/uip-igmp.h to
	  include/nuttx/net/igmp.h (2014-6-24).
	* include/nuttx/net/ip.h: Move include/nuttx/net/uip/uip-ipopt.h to
	  include/nuttx/net/ip.h (2014-6-24).
	* include/nuttx/net/uip.h: Move include/nuttx/net/uip/uip.h to
	  include/nuttx/net/uip.h (2014-6-24).
	* net/uip/uip.h: Rename net/uip/uip_internal.h to net/uip/uip.h
	  (2014-6-24).
	* net/iob:  Add support for throttling read-ahead buffering if the
	  read-ahead buffering is competing with write buffering for I/O
	  buffers (2014-6-24).
	* net/: Many files changed.  Convert existing TCP read-ahead logic
	  to use I/O buffer chains (2014-6-24).
	* net/: Clean up all TCP and UDP related naming (204-6-24).
	* net/: Clean up all ICMP, IGMP, ARP, and PKT related naming
	  (204-6-25).
	* arch/arm/src/sam34 and include/sam34:  Add support for the SAM4CM
	  family.  From Max Neklyudov (2014-6-25).

7.4 2014-08-15 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32/stm32_i2c.c:  Fix missing configuration of
	  GPIO pins in I2C driver.  Fix from Alex D. (2014-6-25).
	* NET: Fix an include file ordering problem when CONFIG_NET_STATISTICS=y.
	  (2014-6-26).
	* include/nuttx/net/netstats.h: Move statistics from uip.h to new netstats.h
	  to remove nasty circular inclusion problem (2014-6-26).
	* arch/arm/src/sama5:  Add logic to redirect all SAMA5D4 interrupts to
	  the AIC (2014-6-26).
	* net/route: Move routing table functions to net/route (2014-6-26).
	* net/utils: Move some files into net/utils (2014-6-26).
	* net/:  Repartition initialization logic so that net/uip is at the bottom
	  of the food chain, instead of at the top.
	* apps/include/hex2bin.h:  The hex2bin library did not build with
	  debug disabled (2014-6-26).
	* configs/sama5d4-ek/dramboot and src/dram_main.c:  Add a boot loader that
	  runs from ISRAM and loads an Intel HEX file into DRAM (2014-6-26).
	* configs/sama5d4-ek/nsh and scripts/: Setup the SAMA5D4-EK NSH
	  configuration to use the DRAMBOOT loader by default (2014-6-26).
	* binfmt: Various changes associated with symbol tables.  Most from Pelle
	  Windestam (2014-6-27).
	* Networking: Add network device ioctl to access PHY registers. From Daniel
	  Lazlo Sitzer (2014-6-27).
	* net/netdev:  Move net/netdev*.c to net/netdev/netdev*.c (2014-6-27).
	* arch/arm/src/sam34/chip/sam4cm_ipc.h:  Add SAM4CM IPC register header
	  file.  From Max Neklyudov (2104-6-27).
	* arch/arm/src/sam34:  Various fixes PMC and clock configuration for the
	  SAM4CM port from Max Neklyudov (2104-6-27).
	* configs/sama5d4-ek/src/dram_main.c: SAMA5D4:  Bootloader needs to flush
	  D-Cache to memory before disabling the caches (2014-6-27).
	* net/Makefile: Fix a Make.defs inclusion omitted in a previous check-in
	  (2014-6-17).
	* net/utils:  Move net/uip/uip_chksum.c to net/utils/net_chksum.c
	  (2014-6-17).
	* configs/sama5d4-ek/at25boot and src/at25_main.c:  Add a configuration
	  that will load a bootloader into AT25 Serial FLASH (2014-6-28).
	* libc/math: Change double_t to double in rint().  Add rintf() and rintl()
	  while we are at it (2014-6-28).
	* net/iob: Fix some errors in recent network I/O buffering when stack runs
	  from interrupt level.  Reported by Manuel Stühn (2014-6-28).
	* net/sockets:  Create the net/sockets directory and hook it into the
	  build system.  Move all socket-related C files into net/socket.  Move
	  net/net.h to net/socket/socket.h (2014-6-28).
	* net/ipv6:  Move IPv6 files from net/uip to net/ipv6 (2014-6-28).
	* net/devif:  Rename net/uip to net/devif.  Rename uip/uip.h to
	  devif/devif.h (2014-6-28).
	* net/devif: Rename many functions in net/devif from uip_* to devif_*
	  (2014-6-28).
	* configs/sama5d4-ek/src/nsh:  The SAMA5D4-EK NSH configuration now
	  supports the RTC by default (2014-6-29).
	* arch/arm/src/sama5/Kconfig and sam_hsmci.c:  Add configuration to
	  assign an XDMAC channel to an HSMCI (2014-6029).
	* Various fixes for networking and tiny webserver from Max (2014-6-29).
	* SAMA5: Various fixes related to DMA in order to get the HSMCI
	  driver to build for the SAMA5D4 (2014-6-29).
	* SAMA5D4-EK: Fix HSMCI card-detect pin selection (2014-6-29).
	* net/:  Still renaming, mostly uip_* to net_* (2014-6-29).
	* arch/arm/src/stm32/stm32_i2c.c and stm32_i2c_alt.c, and
	  libc/time/lib_daysbeforemonth.c:  Make variable definitions
	  'static const' when possible to save RAM usage.  From Kosma
	  Moczek (2014-6-30).
	* include/stdint.h: Correct naming of [U]INT_LEASTn_{MAX|MIN}
	  and [U]INT_FASTn{MAX|MIN}. From Kosma Moczek (2014-6-30).
	* drivers/mtd/mtd-config:  Extend erase block size to 18-bits in
	  order (decrease block size to 14-bits) to handle parts with large
	  erase blocks. From Kosma Moczek (2014-6-30).
	* drivers/analog/adc.c: Remove empty ADC write method. From Kosma
	  Moczek (2014-6-30).
	* arch/arm/src/stm32/stm32_serial.c: Unconfigure GPIO pins when
	  closing a serial port to prevent back effects from back-powering on
	  the TX pin. From Kosma Moczek (2014-6-30)
	* arch/arm/src/stm32/Kconfig:  Move temperature ranges from chip
	  selection configuration prompts. Reorder MCUs in choice menu;
	  remove duplicates. Add support for the STM32F103RC and RD.  From
	  Kosma Moczek (2014-6-30)
	* configs/sam4s-xplained-pro:  Correct description of LEDs and
	  usage. From Kosma Moczek (2014-6-30)
	* include/unistd.h: Some POSIX_* and _POSIX_* macros are defined
	  without value, whereas (as far as I can tell) the newer versions
	  of the standard require them to have the value corresponding to
	  the standard version implemented, like 200809L. Are the any plans
	  to clean this up? For now I've put together a quick patch that
	  defines those macros to 1, consistent with the rest of unistd.h.
	  From Kosma Moczek (2014-6-30)
	* arch/arm/src/sama5/sam_memories.c:  Fix some logic in conversion
	  of physical and virtual DRAM addresses when running out of DRAM.  This
	  is an important bug fix for the SAMA5D3 and 4 when running out of
	  DRAM (2014-6-30).
	* arch/arm/src/sama5/sam_pio.c:  Another *critical* SAMA5D3 and 4 bug
	  fix:  PIO clocking must be enabled for all input pins or else the
	  value that is read never changes. (2014-6-30).
	* net/:  Many more functions renamed to follow new modularization of
	  the networking code.  This is part of an ongoing repartitioning
	  effort and there is still more to be done.  There will be no additional
	  notations in this ChangeLog until the renaming is complete (2014-6-30).
	* arch/arm/src/sam34/sam_emac.c, sama5/sam_emaca.c, sam_emacb.c, and
	  sam_gmac.c:  Fix cloned error:  Wrong bits being cleared before ORing
	  in new bits (2014-7-1).
	* drivers/syslog/ramlog.c: syslog_putc needs to set the errno and
	  return EOF on a failure (2014-7-1).
	* SAM3/4 and SAMA5 Ethernet:  Fix an error in the function that
	  determines the number of free TX descriptors.  This is an important
	  bugfix on busy networks (2014-7-2).
	* SAM4 AES driver.  Contributed by Max Neklyudov (2014-7-3).
	* crypto/ and include/crypto:  Beginnings of a crypto/ subsystem from
	  Max Neklyudov (2014-7-3).
	* arch/arm/src/stm32 and fs/procfs:  Add a procfs entry to show the
	  state of the CCM heap usage.  From Pelle Winderstam (2013-7-3).
	* SAMA5 OHCI: Fix an error in a DEBUGASSERT statement.  Caused assertion
	  to fire inappropriately when a low- or full-speed device was removed
	  and CONFIG_DEBUG=y (2013-7-3).
	* SmartFS.  Fix for a bug that would show up if CONFIG_MTD_BYTE_WRITE
	  was not selected and the SMART sector size was larger than the mt
	  device's block size (like it would be if using SMARTFS on larger
	  flash devices).  From Ken Pettit (2014-7-3).
	* tools/mkdeps.c: NAME_MAX not available on SunOS; use FILENAME_MAX
	  or MAXNAMELEN.  Noted by Douglas Beattie (2014-7-4).
	* drivers/mtd/smart.c: Increase some variables from uint16_t to uint32_t
	  to handle larger device sizes.  From Ken Pettit (2014-7-4).
	* SAMA5 OHCI: Pointers to allocated port values were not being nullified
	  after being deallocated.  This caused some assertions to fire when
	  debug was enabled (2014-7-4).
	* include/nuttx/net/ip.h and ipopt.h:  ip.h renamed ipopt.h.  Moved
	  parts of uip.h to net.h. Renamed the rest of uip.h to ip.h.  Removed
	  all includes of uip.h; added includes of ip.h wherever needed.
	  Tried to fix problems of the now missing sneak inclusions because
	  uip.h was removed.  There are probably a few of these that were
	  missed! (2014-7-4).
	* drivers/input/mxt.c/h and include/nuttx/input/mxt.h:  Add very basic
	  support for the Atmel maXTouch touchscreen controller (2014-7-5).
	* net/*/*.h: Start moving the private definitions from header files
	  at include/nuttx/net to the corresponding header file under net/.
	  So far pkt.h, upd.h, and igmp.h have been sanitized.  Still a few
	  to go (2014-7-5)
	* configs/sama5d4-ek/src/sam_maxtouch.c:  Add board support for the
	  maXTouch touchscreen controller (2014-7-5).
	* net/*/*.h: Finish moving the private definitions from header files
	  at include/nuttx/net to the corresponding header file under net/.
	  This additional header files have been sanitized: arp.h, icmp.h, tcp.h
	  (2014-7-6)
	* net/: Add a few missing configuration options to the Kconfig files
	  (2014-7-8).
	* net/iob/iob_trimhead_queue.c and socket/recvfrom.c:  Important fix to
	  the read-ahead buffer queue management: Consumed bytes were being
	  trimmed from the head of the queue, but the queue head itself was
	  not being updated.  From Rony XLN (2014-7-7).
	* drivers/bch:  Add configurable AES encryption support to block-to-
	  character (BCH) driver.  This allows any block device to be accessed
	  as an encrypted character device.  From  Max Nekludov (2014-7-7).
	* SAM3/4: Fix compile of sam_aes.c if CONFIG_CRYPTO_AES is defined.
	  From  Max Nekludov (2014-7-7)
	* SAMA5D3/4 I2C: Test for read or write operation was reversed.  How
	  could this have worked before? (2014-7-7).
	* SAMA5D3/4 PIO Interrupts:  Correct a typo in
	  arch/arm/src/sama5/sam_pio.h that could disable PIO interrupt support
	  if only PIOE interrupts were enabled (2014-7-7).
	* SAMA5D4 PIO Interrupts: Macro SAM_PION_VBASE is not defined for the
	  SAMA5D4 and must be replaced with a table lookup (2014-7-7).
	* configs/sam*: Fix some cloned errors in SAM GPIO interrupt setup
	  (1014-7-7).
	* arch/arm/src/sama5/Kconfig and sam_allocateheap.c:  Add a
	  configuration option to reserve DRAM for a framebuffer when executing
	  out of DRAM.  This optional was available before when executing out of
	  NOR, but needs to work a little differently in this case (2014-7-7).
	* arch/arm/src/sama5/sam_lcd.c and chip/sam_lcdc.h: Adapt the SAMA5D3
	  LCDC driver to work with the SAMA5D4 which has no hardware cursor
	  (2014-7-8).
	* configs/sama5d4-ek:  Add options to support an LCD (2014-7-7).
	* arch/arm/src/sama5/sam_twi.c:  Now support the up_i2creset() method
	  (2014-7-9)
	* drivers/input/mxt.c:  Use i2c_reset() if it thinks that the bus
	  might by hung (2014-7-9).
	* arch/arm/src/sama5/sam_pio.c/.h:  Add a new interface
	  sam_pio_forceclk() that can be used to force PIO clocking on.  I am
	  afraid I was too conservative with PIO clocking in the initial design;
	  this is the price (2014-7-9).
	* arch/arm/src/sama5/sam_twi.c: Use sam_pio_forceclk() so that we can
	  read the current state of an open-drain output in the TWI reset logic
	  (2014-7-9).
	* arch/arm/src/sama5/sam_pio.c/.h: Fix a typo in Schmitt trigger
	  configuration; Configure pin as a a vanilla input first so that final
	  pin configuration is more read-able (i.e., easier to debug)
	  (2014-7-9).
	* drivers/input/mxt:  The maXTouch driver works! (2014-7-10).
	* configs/sama5d4-ek:  The TM7000 LCD works! (2014-7-10).
	* configs/sama5d4-ek/NxWM:  Add an NxWM configuration (2014-7-10).
	* drivers/mtc_rwbuffer.c (and others): Add an MTD layer that will add
	  read-ahead or write buffering to any MTD driver (incomplete) (2014-7-11).
	* arch/arm/src/lpc17xx/lpc17_ethernet.c: Comment out an assertion that
	  is reported to fire inappropriately.  From Max (2014-7-11).
	* drivers/mtd (mostly): Addition rwbuffer interfaces should not be
	  enabled unless they are needed; if rwbuffer support is enabled, it
	  should not be unconditionally enabled in SMART and FTL (2014-7-11).
	* libnx/nxglib/nxglib_colorcmp.c and include/nuttx/nx/nxglib.h: New
	  utility to compare two colors (2014-7-11).
	* graphics/Kconfig and nxbe/nxbe_configure.c: The initial background
	  color is now configurable (2014-7-11).
	* graphics/nxmu/nxmu_server.c and nxsu/nx_setbgcolor.c:  Don't change
	  the background if the color did not really change (2014-7-11).
	* arch/arm/src/sama5/sam_ldc.c and sama5d4-ek/include/board.h:  Back
	  out the delay kludge.  The actual fix to the LDC instability was to
	  drive the LCD at 2xMCK instead of 1xMCK (2013-7-12).
	* drivers/input/mxt.c:  Fix an error in the state machine (2014-7-12).
	* drivers/input/mxt.c:  Add thresholding so that "move" reports are not
	  generated unless there is a significant change in the reported
	  position (2014-7-12).
	* SAMA5D4-EK MXT: The maXTouch should be able to handler an I2C
	  frequency of 400KHz.  Valid interrupts should occur only on the
	  falling edge of the ~CHG signal (2014-7-12).
	* SAMA5D3x-EK: Use larger icons in NxWM configuration instead of
	  scaling (2014-7-14).
	* Graphics: Rename CONFIG_NX_MOUSE to CONFIG_NX_INPUT, then add
	  CONFIG_NX_XYINPUT_MOUSE and CONFIG_XYINPUT_TOUCHSCREEN (2014-7-16).
	* drivers/input/mxt.c:  Fix error in threshoold test... backward
	  logic (2014-7-16).
	* graphics/nxconsole/nxcon_scroll.c:  Fix scrolling in the NxConsole
	  for the case of the framebuffer device.  In this case, the logic
	  for clearing the vacated region at the bottom was missing so garbage
	  up from the last, uncleared line (2014-7-17).
	* drivers/audio/wm8904.c/.h and include/nuttx/audio.wm8904.h:  Framework
	  for a WM8904 audio driver.  The initial driver check-in is simply Ken
	  Pettit's VS1053 driver forced to compile with only WM8904 definitions
	  (2014-7-18).
	* configs/sama5d4-ek/src/sam_wm8904.c:  Add logic to configure and
	  initialize the WM8904 audio CODEC (2014-7-17).
	* arch/arm/src/sama5/sam_sckc.c/.h and chip/sam_sckc.h:  Add SAMA5
	  slow clock support.
	* arch/arm/src/sama5/sam_pck.c and .h:  Add support to use the slow
	  clock as the PCK clock source (2014-7-19).
	* drivers/audio/wm8904.c/:  The WM8904 audio driver is mostly code
	  complete and ready to begin initial testing (2014-7-19).
	* arch/arm/src/sama5/sam_pio.c:  Logic for Schmitt trigger selection
	  backward (2014-7-20).
	* drivers/net/slip.c:  Fix an error in SLIP escaping.  From Max
	  Neklyudov (2014-7-22).
	* drivers/input/Kconfg: Add missing configuration option to select the
	  MAX11802 touchscreen controller. From Petteri Aimonen (2014-7-22).
	* arm/src/stm32/chip/stm32_dac.h:  Fix typos, from Peterri Aimonen
	  (2014-7-22).
	* arch/arm/src/stm32/stm32_otgfsdev.c: STM32 OTGFS device:  Various
	  changes to try to reduce that amount of time in interrupts handles and
	  with interrupts disbled.  Needs verification on other platforms.  From
	  Petteri Aimonen (2014-7-22).
	* arch/arm/src/sama5/sam_pck.c: Fix a recently introduced typo that was
	  being masked by some bad conditional compilation (2015=4-7-22).
	* drivers/audio/wm8904.c and include/nuttx/audio/wm8904.h: Remove WM8904
	  driver unused parameters, clean-up comments, remove some kruft in
	  capability reporting (2014-7-22).
	* audio/Makefile and pcm_decode.c, include/nuttx/audio/pcm_decode.c,
	  configs/sama5d4-ek/src/sam_wm8904.c and others:  Add new framework for
	  the PCM decoder.  It is now a 'front end' for lower-level drivers like
	  the WM8904 that performs the PCM decoding from end (2014-7-22).
	* audio/pcm_decode.c, configs/sama5d4-ek/src/sam_wm8904.c,
	  drivers/audio/wm8904.c, and include/nuttx/audio/pcm.h:  Rename
	  pcm_decode.h to pcm.h since it will hold more than just decoding
	  definitions.  Fix some porting errors like idbg should auddbg, etc.
	  Add wav file header and a few low-level wav utilities (2014-7-22).
	* audio/pcm_decode.c and include/nuttx/audio/pcm.h:  Flesh out a few
	  more PCM methods, still incomplete.  Re-vision PCM structure
	  definition (2014-7-22).
	* configs/sama*:  Disable MMC/SD multiblock transfers in all SAMA5D3/4
	  configurations.  I suspect an issue but have not had time to run it
	  down yet so the easiest thing is simply to disable the feature for
	  now (2014-7-23).
	* drivers/audio/audio_null.c, include/nuttx/audio/audio_null.c, and
	  configs/sama5d4-ek/src/sam_audio_null.c: Add a NULL audio device that
	  can be used to simply unit-level testing of audio decoders (2014-7/23).
	* audio/pcm_decode.c, include/nuttx/audio/audio.h, and drivers/audio/audio_null.c
	  and wm8904.c: Add ioctls so that PCM decoder can configure the driver
	  bitrate, num channels, and sample width (2014-7-23).
	* drivers/audio/Kconfig: Fix a typo in the audio Kconfig file,
	  UDIO->AUDIO (2014-7-23).
	* configs/sama5d4-ek/nxwm/defconfig:  The NxPlayer and audio system are
	  now enabled in the default configuration (although they have not yet
	  been fully integrated into the NxWM media player) (2014-7-23).
	* configs/sama5d4-ek/nsh/defconfig: Enable the command line media player
	  in the NSH configuration as well (still does not work, however)
	  (2014-7-23).
	* audio/Kconfig, audio.c, and include/nuttx/audio/audio.h: Add hooks for
	  fast-forward and rewind needed by CMediaPlayer; add hooks for
	  equalizer settings needed by the WM8904 (2014-7-24).
	* drivers/audio/audio_null.c and wm8904.c: Fix some compile errors when
	  audio DEBUG is enabled (2014-7-24).
	* SAMA5D4-EK NxWM:  Configuration refreshed (2014-7-24).
	* arch/arm/src/armv7-m/up_initialstate.c:  Correct the initial value of
	  the BASEPRI register.  This was apparently never being initialized!
	  From Max (2014-7-24).
	* configs/mbed/src/up_adc.c, up_dac.c, and up_pwm.c and include/board.h:
	  Port ADC, DAC, and PWM logic from the configs/zkit-arm-1769.  From Max
	  (2014-7-24).
	* arch/arm/src/lpc17xx/lpc176x_rtc.c: Eliminate warnings.  From Max
	  (2014-7-24).
	* arch/arm/src/lpc17xx/lpc17_pwm.c, lpc17_timer.c, lpc17_dac.c: Mostly
	  cosmetic updates from Max (2014-7-24).
	* arch/arm/src/lpc17xx/lpc17_adc.c and Kconfig : Added burstmode ADC
	  conversion mode, with CONFIG_ADC_BURSTMODE option in Kconfig.  From
	  Max (2014-7-24).
	* arch/arm/src/lpc17xx/lpc17_ethernet.c: Added option to use the kernel
	  worker thread to do most of the workload with CONFIG_NET_WORKER_THREAD
	  option in Kconfig.  Eliminated a problem with PHY DP83848C : it doesn't
	  need a specific initialization on mbed. Critical bugfix: From time to
	  time (after some hours) the Ethernet receiver would lose one receive
	  interrupt and the IP stack never recover because there is no receive
	  watchdog as the transmit watchdog.  From Max (2013-7-24).
	* audio/pcm_decode.c: Add missing audio callback forwarding logic
	  (2014-7-25).
	* arch/arm/armv7-a/l2cc_pl310.h:  Move arch/arm/sama5/chip/sam_l2cc.h to
	  arch/arm/armv7-a/l2cc_pl310.h.  Adjust the two corresponding Kconfig
	  files as well (2014-7-25).
	* arch/arm/src/armv7-a/arm_l2cc_pl310.c, l2cc.h, l2cc_pl310.h, Kconfig:
	  Add initial support for the ARM L2CC-PL310 L2 cache (2014-7-26).
	* arch/arm/src/armv7-a/cp15_cacheops.h: Rename ARMv7-A cache.h to
	  cp15_cache.h.  Things will be broken on this commit until I get the
	  new cache.h in place (2014-7-26).
	* arch/arm/src/armv7-a/cache.h: New cache.h file.  Renames all functions
	  like cp15_XYZ_cache() to arch_XYZ_cache() and adds L2 cache support if
	  L2 cache is enabled (2014-7-26).
	* arch/arm/src/sama5/*.c (many files): Change naming from cp_XYZ_cache()
	  to arch_XYP_cache() so that all cache operations will pick up L2
	  support if it is enabled (2014-7-26).
	* arch/arm/src/sama5/sam_boot.c: Enables cache early in boot-up sequence
	  (2014-7-26).
	* arch/arm/src/armv7-a/arm_l2cc_pl310.c and l2cc.h: Minor bugfixes/
	  improvements (2014-7-26)
	* arch/arm/src/armv7-a/Kconfig: L2 Cache currently depends on
	  EXPERIMENTAL because it does not yet work properly (2014-7-26).
	* include/nuttx/audio/audio.h: Move sub-sampling rate definitions from
	  nxplayer.h to audio.h (2014-7-17).
	* audio/pcm_decode.c: PCM: First cut at fast forward by sub-sampling.
	  This design is overkill:  It manages too many audio buffers.  I think
	  that a cleaner design could do all sub-sampling in place without
	  managing additional audio buffers (2014-7-27).
	* drivers/audio/audio_null.c:  Was not returning buffers to the upper
	  level (2014-7-27)
	* include/nuttx/audio/audio.h and audio/pcm_decode.c: Misc bugfixes
	  while integrating fast forward by sub-sampling (2014-7-27).
	* audio/pcm_decode.c: Back out a change; the fix really belongs in
	  NxPlayer. (2014-7-27).
	* arch/arm/src/lpc17xx/lpc17_adc.c and arch/arm/src/lpc17xx/lpc17_ethernet.c:
	  ADC updates from Max.  Also fixes some syntax errors that I introduced in
	  the last commit (2014-7-28).
	* audio/pcm_decode.c:  Fix a logic error in a DEBUG assertion (2014-7-28).
	* configs/sama5d4-ek/src/sam_pmic.c, dram_main.c, sama5d4-ek.h, Makefile.
	  Add logic to disable the faulty PMIC.  This must be done with JP23 open.
	  It is performed only from the DRAMBOOT loader (2014-7-28).
	* drivers/audio/wm8904.c: Fix some compile problems with the WM8904 driver
	  due to recent audio subsystem changes (2014-7-28).
	* arch/arm/src/sama5/sam_timerisr.c and configs/sama5d3*/include/board*.h:
	  Correct system timer frequency.  Input clock is MCK/2, not MCK
	  (2014-7-29).
	* fs/fs_automount.c and include/nuttx/fs/automount.h (plus hooks in other
	  files):  Add support for an auto-mounter that will automatically mount
	  and unmount a file system a media is inserted and removed (2014-7-29 .
	* configs/sama5d4-ek/src/sam_automount.c:  Add automounter support for
	  HSMCI0 and HSMCI1 (2014-7-29).
	* configs/sama5d4-ek/Kconfig and src/sam_hsmci.c: Minor warning/latent
	  bug clean-up of auto-mounter logic (2014-7-29).
	* configs/sama5d4-ek/README.txt anand src/sam_nsh.c, fs/fs_automount.c,
	  and include/nuttx/fs/automount.h: Cosmetic updates to comments and
	  README files and some naming (2014-7-29).
	* configs/sama5d4-ek/nsh/defconfig and nxwm/defconfig: The SAMA5D4-EK
	  NSH and NxWM configurations now have the auto-mounter configured to
	  automatically mount the FAT file system on HSMCI0 at /mnt/sdcard
	  (2014-7-29).
	* arch/arm/src/sama5/sam_hsmci.c: Add method to do RX transfer without
	  DMA.  The 8-byte SCR transfer was failing silently with the DMA
	  transfer, leaving the SD card in single bit mode (2014-7-29).
	* arch/arm/src/sama5/sam_hsmci.c: Fix a problem on card insertion/removal
	  callback handling.  Interrupts were being disable so that the callbacks
	  occurred with interrupts disabled.  This resulted in loss of some
	  interrupts and some not-so-good behaviors.  The solution is to perform
	  all callbacks on the work thread unconditionally (2014-7-30).
	* nuttx/fs/fs_automount.c: Auto-mounter:  Fix state setting.  Not
	  harmful other than it can cause a debug assertion to fire if you
	  manually unmount the media before removing it which is, of course,
	  what you are supposed to do (2014-7-30).
	* arch/arm/src/sama5/sam_hsmci.c and README files: Re-enable TX DMA and
	  verify that DMA writes to the SD card are functional.  They are so now
	  TX DMA is re-enabled in the driver.  This might affect the SAMA5D3
	  platforms where the TX DMA problem was found.  The SAMA4D3 and 4 use
	  the same HSMCI driver.  Much has change since then and it is not
	  surprising that DMA is now functional.  However, the has not be re-
	  verified on the SAMA5D3 which has a different DMA controller
	  (2014-7-30).
	* arch/arm/src/sama5/sam_dmac.c, sam_pio.c, and sam_pioirq.c: Changes
	  needed for a clean SAMA5D3 build after all of the recent SAMA5D4
	  changes (2014-7-31).
	* configs/sama5d3x-ek/nsh/defconfig: Refresh configuration (2014-7-31).
	* configs/sama5d3x-ek/Kconfig, README.txt, src/sam_wm8904.c, Makefile,
	  sam_nsh.c, and sama5d3x-ek.h: Add support for the WM8904 audio CODEC
	  (2014-7-31).
	* configs/sama5d3x-ek/nxplayer:  Add a configuration to support the
	  command line NxPlayer (2014-7-31).
	* audio/audio.c: More debug output (2014-7-31).
	* configs/sama5d3x-ek/README.txt: REAME update (2014-7-31).
	* drivers/audio/wm8904.c:  Was not saving I2S interface instance
	  (2014-7-31).
	* sched/sem_wait.c: Use set_errno() and get_errno().  Direct access
	  inside the OS may not be supported in the future (2014-7-31).
	* drivers/audio/audio_null.c, vs1053.c, wm8904.c, include/nuttx/audio/audio.h,
	  libc/audio/lib_buffer.c: Change how the end of the audio stream is
	  detected by the leaf audio component.  This used to be done by looking
	  for the first partial buffer.  That does not work with the in-place
	  sub-sampling performed by the PCM decoder:  That always reduces the
	  size of the buffer so that all buffers only partially filled by the
	  time they get to the leaf.  Now, a flag is set in the audio buffer
	  flags set to indicate the final buffer in the stream (2014-7-31).
	* arch/arm/src/sama5/sam_ssc.c:  Needs to account for data offset in
	  audio buffer (2014-7-31).
	* drivers/audio/wm8904.c:  Can't reset the WM8904 unless we also
	  reinitialize all registers.  Try to get a saner timeout based on
	  sample rate, bits-per-sample, and buffer size (2014-7-31).
	* arch/arm/src/sama5/Kconfig and sam_ssc.c:  SCC Frame Synch Delay and
	  Start Delay are now configurable (2014-8-1).
	* drivers/audio/wm8904_debug.c:  Add logic to dump WM8904 registers
	  (2014-8-1).
	* drivers/audio/wm8904.c: Fix an error in write logic.  I am not sure
	  why this fixes the problem (2014-8-1).
	* include/nuttx/audio/wm8904.h (and implementers of the interface):
	  the WM8904 driver needs to know the frequency of the MCLK in order
	  to set up the FLL to generate the correct bitrate (2014-8-1).
	* WM8904:  Add an option to control WM8904 register dumping (2014-8-2).
	* WM8904:  Add logic to program the FLL to achieve the bitrate
	  (2014-8-1).
	* arch/arm/src/sama5/sam_ssc.c:  Verify that the requested bit width
	  is supported.  Correct some alignment tests that depend upon the data
	  bit width (2014-8-2).
	* audio/pcm_decode.c:  Correct the end of audio stream handling.  It was
	  not being detected before so that logic was not examining the WAV
	  header in the first buffer of the next audio file (2014-8-2).
	* configs/sama5d3x-ek/nxplayer/defconfig:  Update with last WM8904
	  settings (2014-8-2).
	* drivers/audio/wm8904.c:  Disable the FFL at the end of playing
	  (2014-8-2).
	* include/nuttx/audio/wm8904.h:  Fix wm8904_dump_registers macro:
	  Wrong number of parameters (2014-8-2).
	* arch/arm/src/sama5/sam_pck.* and all SAMA5D board header files:
	  Add Main clock as an option for the PCK clock source (2014-8-3).
	* configs/sama5d*-ek/Kconfig and src/sam_wm8904.c: Add option to
	  use MAINCK as source fort he WM8904 MCLK (2015-8-3).
	* include/nuttx/audio/wm8904.h, configs/sama5d3x-ek/src/sam_wm8904.cm,
	  and sama5d4-ek/src/sam_wm8904.c: WM8904 interface enable method now
	  returns the previous interrupt state (2014-8-4).
	* configs/sama5d3x-ek/src/sama5d3x-ek.h and sama5d4-ek/src/sama5d4-ek.h:
	  Correct the WM8904 interrupt configuration, active high level. Fix
	  that and don't pull-up (2014-8-4).
	* configs/sama5d3x-ek/src/sam_wm8904.cm, and sama5d4-ek/src/sam_wm8904.c:
	  Correct ordering of some WM8904initialization: Need to provide MCLK
	  before initializing the WM8904, not after (2014-8-4).
	* drivers/audio/wm8904.c and .h: Correct calculation of bitrate (I am
	  not sure why this is correct). LR clock divisor is now a constant 32-
	  bits per frame. Conditioned out interrupt logic; it is not being used.
	  Also added some FLL lock interrupt/poll logic (which was subsequently
	  disabled) (2014-8-4).
	* SAMA5D3x-EK and SAMA4D4-EK: Add/update usage documents for media
	  players (2014-8-4).
	* drivers/audio/wm8904.c and .h:  Add reset logic to put the part back
	  in its initial state after playing each WAV file.  Base samples per
	  second on frame length, not bits-per-sample.  Use a different frame
	  length for 8-bit and 16-bit data (2014-8-4).
	* arch/arm/src/sama5/sam_hsmci.c:  TX DMA is again disabled for the
	  SAMA5D3 family.  Although it works with the SAMA5D4 (which has a
	  different DMA subsystem), it does not work with the SAMA5D3 (2014-8-5,
	  see also 2014-7-30).
	* audio/pcm_decode.c: Handle errors in the PCM WAV file in a way that
	  the Nxplayer can recover gracefully:  Send and Audio Complete message
	  (2014-8-5).
	* arch/*/src/*/*_timerisr.c, up_initialize.c, and up_internal.h: Re-name
	  up_timerinit() to up_timer_intialaize() for compatibility with new
	  tickless OS interface name (2014-8-6).
	* arch/*/src/*/Make.def:  Don't build existing timer initialization
	  logic if CONFIG_SCHED_TICKLESS is defined (2014-8-6).
	* include/nuttx/arch.h:  First cut at platform-specific interfaces
	  needed to support tickless OS option (2014-8-6).
	* sched/Kconfig: Add a new option CONFIG_SCHED_TICKLESS to enable the
	  tickless OS.  This is a work in progress but should be relatively
	  safe since the new features are only enabled by this option (Safer
	  but not 100% safe since it does not protect from typos and other
	  dumb errors) (2014-8-6).
	* arch/sim/src/Makefile, up_idle.c, up_internal.h, and up_tickless.c:
	  Add support for a simulated interval timer support verification of
	  the tickless OS (2014-8-6).
	* include/nuttx/arch.h: Added another tickless OS interface to get
	  the timer remaining on the interval timer (2014-8-6).
	* include/nuttx/clock.h, sched/clock_initialize.c and clock_internal.h:
	  If CONFIG_SCHED_TICKLESS is defined, then the global variable
	  g_system_timer does not exist (2014-8-6).
	* sched/Makefile: Don't build in sched_processtimer.c if
	  CONFIG_SCHED_TICKLESS is selected (2014-8-6).
	* sched/clock_gettime.c and clock_settime.c: Use the clock_systimer()
	  macro, do access the g_system_timer() global directly (2014-8-6).
	* sched/clock_systimer.c: Uses interval timer interfaces to get the
	  time if CONFIG_SCHED_TICKLESS is selected (2014-8-6).
	* sched/sched_timerexpiration.c, Makefile, os_internal.h,
	  sched_addreadytorun.c, sched_processtimer.c, sched_unlock.c,
	  wd_cancel.c, wd_internal.h, and wd_start.c: Implements the
	  tickless OS (2014-8-7).
	* Many files: Remove CONFIG_DISABLE_CLOCK.  Why?  This option is not
	  really very useful and was only selected in a few unusable, mostly
	  unusable configurations anyway (m9s12/ostest, kl25z/minnsh,
	  z180/ostest, 8051, sh1, z80, and z8).  The only real loss is probably
	  to the kl25z/minsh configuration .  And with the addition of the
	  tickless OS, I just wanted to make the pain go away (2014-8-7).
	* Many files: Change CONFIG_MSEC_PER_TICK to CONFIG_USEC_PER_TICK.
	  This gives more options for system timers in general, but more
	  importantly, let's us realize higher resolution for the case of
	  CONFIG_SCHED_TICKLESS=y -- of course, at the risk of some new
	  integer overflow problems 2014-8-7).
	* Many files: Change all time conversions.  Yech.  New timer units
	  in microseconds breaks all existing logic that used milliseconds
	  in the conversions.  Something likely got broken doing this,
	  probably because I confused a MSEC2TICK conversion with a TICK2MSEC
	  conversion (2014-8-7).
	* arch/sim/src/up_tickless.c and sched/sched_timerexpiration.c: The
	  tickless OS now appears fully functional and passes the OS test
	  on the simulator with no errors (2014-8-7).
	* sched/mqueue: Move POSIX message queue files from sched/ to
	  sched/mqueue (2014-8-8).
	* sched/signal: Move signal-related files from sched/ to sched/signal
	  (2014-8-8).
	* sched/pthread: Move all pthread files from sched/ to sched/pthread
	  (2014-8-8).
	* sched/semaphore: Move POSIX counting semaphore files from sched/ to
	  sched/semaphore (2014-8-8).
	* sched/environ: Move environment files from sched/ to sched/environ
	  (2014-8-8).
	* sched/group: Move group logic from sched/ to sched/group (2014-8-8).
	* sched/wdog: Move watchdog functions from sched/ to sched/wdog
	  (2014-8-8).
	* sched/irq: Move interrupt dispatch logic from sched/ to sched/irq
	  (2014-8-8).
	* sched/clock: Move clock functions from sched/ to sched/clock
	  (2014-8-8).
	* sched/timer: Move POSIX timer files from sched/ to sched/timer
	  (2014-8-8).
	* sched/paging: Move page fill sources from sched/ to sched/paging
	  (2014-8-8).
	* sched/init: Move initialization functions from sched/ to sched/init
	  (2014-8-8).
	* sched/errno: Move errno related files from sched/ to sched/errno
	  (2014-8-8).
	* sched/task: Move task control files from sched/ to sched/task
	  (2014-8-8).
	* sched/: Move a few files in sched/ that did not seem to have a home to
	  sched/signal and sched/task (2014-8-8).
	* sched/sched: Move scheduler files from sched/ to sched/sched
	  (2014-8-8).
	* (Many files): Replace os_internal.h with sched/sched.h in files that
	  actually reference something in sched.h (2014-8-8).
	* sched/task/exit.c: Move sched/exit.c to sched/task/exit.c (2014-8-8).
	* (Many files): Remove os_internal.h it has been replace by several new
	  header files under sched/.  There have been some sneak inclusion paths
	  via os_internal.h, so expect a few compilation errors for some
	  architectures (2014-8-8).
	* Documentation/NuttxPortingGuide.html, arch/sim/src/up_tickless.c, and
	  include/nuttx/arch.h: Fix errors in documentation and comments related
	  to the Tickless OS.  From Vijay Kumar (2014-9-9).
	* arch/arm/src/sama5/sam_tc.c and .h: Can now handle non-constant
	  BOARD_MCK_FREQUENCY. Also now supports methods to attach user
	  interrupt handlers (2014-8-9).
	* drivers/audio/audio_null.c: Fix an error in a variable name
	  (2014-8-9).
	* arch/arm/src/sama5/sam_oneshot.c, .h, Kconfig, Make.defs, sam_tc.c,
	  .h, and sam_adc.c: Add support for a one-shot timer wrapper around
	  the low-level timer/counter logic.  This also involved several changes
	  that rippled into the ADC driver (untested) (2014-8-9).
	* arch/arm/src/sama5/sam_freerun.c, .h, Kconfig, and Make.defs: Add
	  support for a free-running timer wrapper around the low-level
	  timer/counter logic (2014-8-9).
	* arch/arm/Kconfig, src/sama5/sam_tickless.c, Kconfig, Make.defs: Use
	  the one-shot and free-running timers to implement tickless OS support
	  for SAMA5 (2014-8-9).
	* arch/arm/src/sama5/sam_oneshot.c and sam_tc.c: Fix several bugs in
	  timer/counter interrupt logic and one-shot timer logic.  Comments and
	  debug output updated in additional files (2014-8-10).
	* sched/wdog/wd_start.c: Correct a bug in Tickless OS support: logic to
	  detect changes in head of timer list was wrong (2014-5-10).
	* sched/sched/sched_timerexperation.c, sched.h, and wdog/wd_start.c:  In
	  tickless mode, need to stop the interval timer before inserted a new
	  delay into the timer list.  Otherwise, the time is incorrect on the
	  first entry of the list (2014-8-11).
	* arch/arm/src/sama5/sam_freerun.c and sam_oneshot.c:  Correct bad time
	  conversion, 1000000 not 1000 to convert seconds to microseconds
	  (2014-8-11).
	* sched/sched/sched_timerexpiration.c:  Fix inaccurate time conversion.
	  Remove MSEC_PER_TICK from calculation and convert uint32_t to uin64_t
	  (2014-8-11).
	* libc/time/lib_localtime.c, private.h, tzfile.h and several header and
	  make-related files:  Adds support for localtime.  From Max Neklyudov
	  (2014-8-12)

7.5 2014-09-28 Gregory Nutt <gnutt@nuttx.org>

	* clock/clock_systimespec.c and sched/clock/clock_gettime.c:  When
	  reading the system timer, don't read a struct timespec, convert it
	  to a fake tick count, then back to a timespec (2014-8-15).
	* sched/clock/Make.defs, clock_gettime.c, clock_settime.c, include/time.h,
	  nuttx/clock.h, configs/vsn/src/sif.c: Remove CLOCK_ACTIVETIME. It is non-
	  standard, unused, and gets in the way of maintaining clocks (2014-8-15).
	* libc/time/lib_localtime.c:  Modified to that the coding style is much
	  closer to NuttX coding style.  The local header files private.h and
	  tzfile.h were removed and incorporated into lib_localtime.c.  All
	  conditional compilation within lib_localtime.c that unconditionally
	  evaluated to FALSE was removed (2014-8-15).
	* drivers/net/Kconfig and include/nuttx/arch.h: Standardize a PHY
	  interrupt attachment interface (2014-8-16).
	* configs/Kconfig, sama5d3-xplained, sama5d3x-ek, and sama5d4-ek:
	  Convert existing board specific PHY interrupt interfaces to use newly
	  defined standard interface (2014-8-16).
	* include/net/slip.h:  Move SLIP prototypes from net.h to slip.h
	  (2014-8-16).
	* include/net/net.h and net/: Fix some missing function headers
	  (2014-8-16).
	* drivers/net/phy_notify.c, include/nuttxarch.h, net/phy.h, and
	  ioctl.h: Add support for an ioctl that can be used to notify an
	  application when there is a change in the network status signalled
	  by a PHY interrupt (2014-8-16).
	* drivers/net/phy_notify.c, include/net/if.h, ioctl.h, netdev.h, phy.h,
	  and net/netdev/netdev_ioctl.c: Finishes the ioctl definition to
	  subscribe to PHY events. Revamp network ioctl signature to support
	  arguments other than struct mii_ioctl_data (2014-8-16).
	* arch/arm/src/stm32/stm32_eth.c: Modified to support the change to the
	  network ioctl signature changes.  Also add support for new ioctl to
	  setup PHY event notifications (2014-8-16).
	* arch/arm/src/sama5/sam_emaca.c, sam_emacb.c, and sam_gmac.c: Implement
	  all network ioctls, including the new ioctl to setup PHY event
	  notifications (2014-8-16).
	* include/net/if.h:  Add some helper macros to make the code that uses
	  the ioctls a little more compact (2014-8-17).
	* libc/stdio/lib_sscanf.c: NuttX libc tried to guess how many characters
	  to parse, extracted them into a buffer, then ran strtol() on that
	  buffer. That guess is often wrong. A better approach would be to
	  call strtol() directly on the input data, using the endptr return
	  value to determine how many characters to skip after parsing.  From
	  Kosma Moczek (2014-8-18).
	* net/arp/arp_dump.c:  Add missing configuration option to select
	  dumping of ARP packet headers.  Move ARP dumping logic from
	  arp_inout.c to its own file (2014-8-18).
	* net/arp/arp_out.c: Move arp_out() from arp_inout.c to its own file
	  (2014-8-18).
	* net/arp/arp_arpin.c: Move arp_arpin() from arp_inout.c to its own file
	  (2014-8-18).
	* net/arp/arp_ipin.c: Rename arp_inout.c to arpipin.c because that is
	  all that is left in the file (2014-8-18).
	* net/arp/arp_format.c: Move the logic that formats an ARP packet into a
	  separate file where it can be re-used.  (2014-8-18).
	* net/arp/arp_out.c and net/pkt/pkt_send.c:  Change how the IFF_NOARP
	  flag is handled.  This should be set only when data is moved into the
	  buffer and cleared after tested by the ARP logic.  Setting it globally
	  can cause packets to be sent with no valid MAC addresses (2014-8-18).
	* net/arp/arp_send.c: Partial implementation of logic to send ARP
	  requests to assure that an IP address mapping is present in the ARP
	  table (2014-8-18).
	* net/arp/arp_poll.c: Finished the implementation of logic to send ARP
	  requests.  Complete, fully hooked into the networking logic, and ready
	  for test (but still untested) (2014-8-18).
	* net/icmp/icmp_ping.c, net/socket/net_sendfile.c, sendto.c,
	  net/tcp/tcp_send_buffered.c, and tcp_send_unbuffered.c:  If
	  CONFIG_NET_ARP_SEND is enabled, then all ICMP, TCP, and UDP send
	  operations will call arp_send() before attempting the real send
	  operation.  arp_send() will check if the IP address mapping is in
	  the ARP table and, if not send ARP requests periodically until it is.
	  This eliminates losing the first outgoing message because there is not
	  mapping in the ARP table (2014-8-18).
	* net/arp/arp_notify.c, arp_send.c, arp_arpin.c, and arp.h:  Add
	  signalling logic so that we do not have to wait so long with the
	  network responses to ARP requests quickly (2014-8-19).
	* include/nuttx/lcd/ili9341.h: Add a register definition header file
	  for the ILI9341 LCD (2014-8-19).
	* net/arp/Kconfig: ARP request logic is no longer EXPERIMENTAL
	  (2014-8-20).
	* net/arp/arp_send.c: ARP request logic needs to do the right thing if
	  (1) the address is a broadcast or multicast address, and (2) if the
	  IP address lies outside of the network.  Problem noted by Manuel Stuehn
	  (2014-8-20).
	* configs/sam4e-ek/src/Kconfig and src/sam_ili9341.c: Add ILI9341-based
	  LCD driver.  Fully functional (2014-8-20).
	* configs/sam4e-ek/nxwm:  Add an NxWM configuration for the SAM4E-EK
	  (2014-8-21).
	* configs/viewtool-stm32f107: Refresh some configurations (2014-8-20).
	* nuttx/sched/wdog: If we run out of pre-allocated watchdog times, the
	  logic will allocate additional timers from the heap.  A reserve of
	  pre-allocated watchdog timers is maintained so that there will always
	  be timers available for interrupt handlers (2014-8-21).
	* include/nuttx/wdog.h (and many affected files):  wdog.h does not
	  contain any application interface, only internal OS interface.
	  Further, it is non-standard.  Move wdog.h from include/ to
	  include/nuttx (2014-8-21).
	* Documentation/NuttxPortingGuide.h:  For the same reason as above, move
	  the description of the watchdog timer interfaces from the Users Guide
	  to the Porting Guide (2014-8-21).
	* arch/arm/src/stm32/stm32_uart.h: STM32 F401: Correct support for
	  USART6 on this chip.  From Freddie Chopin (2014-8-22).
	* nuttx/sched/wdog and include/nuttx/wdog.h:  Add support for statically
	  allocated watchdog timer (also eliminate some unconventional typing)
	  (2014-8-22).
	* configs/p112/ostest and tools/mkdeps.c:  Changes to try to get P112 to
	  compile with latest SDCC (it still does not) (2014-8-22).
	* sched/group/group_leave.c: Need to release the address environment when
	  the task group is released (2014-8-22).
	* mm/mm_granreserve.c and and mm_granmark.c: gran_reserve():  Add a
	  new function to reserve unallocatable regions in the granule heap
	  (2014-8-23).
	* include/nuttx/pgalloc.h and mm/mm_pgalloc.c:  Add a simple page
	  allocator based on the existing NuttX granule allocator.  I am not
	  certain if the granule allocator is sufficiently deterministic for
	  long range use, but it gets get a page allocator in place for testing
	  very quickly (2014-8-23).
	* ARMv7-A: Add skeleton implementation and build support for process
	  address environments (2014-8-23).
	* Many files: Change CONFIG_ADDRENV to CONFIG_ARCH_ADDRENV; change how
	  it is selected -- the architecture must first declare support
	  (2014-8-24).
	* include/nuttx/addrenv.h, arch/arm/include/arch.h, armv7-a/irq.h, and
	  other files:  Add addrenv.h; First cut at Cortex-A address environment
	  structures; Add configuration options to setup address environment
	  (2014-8-24).
	* addrenv interface changes: up_addrenv_create() may need to create
	  .text and .bss/.data separately because of differing access privileges
	  (read/execute vs read/write).  And, as a consequence, up_addrenv_vaddr()
	  needs to be split into up_addrenv_vtext() and up_addrenv_vdata().
	  Affects several files (2014-8-24).
	* arch/arm/src/armv7-a/arch_coherent_cache.c:  New file.  These cache
	  operations are called from the ELF loader in order to flush D-cache
	  and invalidate I-cache after an ELF module has been loaded into memory.
	  With this change, ELF modules work correctly on the SAMA5/Cortex-A
	  platform (2014-8-24).
	* configs/sim: Add build support for ELF modules.  Useless at the moment
	  because there is no x86 relocation logic support (2014-8-25).
	* configs/sim: Update some sim/ defconfig files.  This now automatically
	  switches them to x86_64 builds (2014-8-25).
	* arch/arm/include/arch.h, armv7-a/irq.h, src/armv7-a/arm_addrenv.c,
	  armv7-a/arm_mmu.c/.h, sama5/Kconfig, Make.defs, sam_pgalloc.c,
	  include/nuttx/addrenv.h, arch.h, pgalloc.h, mm/Kconfig, mm_pgalloc.c,
	  sched/init/os_start.c: Cortex-A/SAMA5 address environment support is
	  code complete (untested) (2014-8-25).
	* arch/arm/include/tiva and src/tive:  Add support for the TI CC3200.
	  From Jim Ewing (2014-8-26).
	* configs/cc3200-launchpad:  Add support for the TI CC3200 Launchpad.
	  From Jim Ewing (2014-8-26).
	* arch/*/*_blocktask.c, arch/*/*_unblocktask.c, and arch/*/*_exit.c:
	  Add address environment support to all implementation of up_block_task(),
	  up_unblock_task(), and _exit() (2014-8-31).
	* arch/arm/src/stm32/stm32_flash.c and chip/stm32_flash.h,
	  include/nuttx/progmem.h, and configs/vsn/src/sif.c: STM32 FLASH fixes:
	  use size_t instead of uint16_t, make interface more generic.  From
	  Freddie Chopin (2014-8-28).
	* Kconfig, Makefile.unix, Makefile.win, syscall/Kconfig,
	  arch/arm/src/armv6-m/svcall.h, up_svcall.c, armv7-m/svcall.h, and
	  up_svcall.c: The system call library can now be built with
	  CONFIG_NUTTX_KERNEL.  New selection: CONFIG_LIB_SYSCALL (2014-8-28).
	* arch/arm/src/armv7-a/syscall.h: "Add an ARMv7-A system call definition
	  header file (2014-8-28).
	* arch/arm/include/armv7-a/irq.h, arm_syscall.c, syscall/Kconfig,
	  syscall_funclookup.c, syscall_nparms.c, and syscall_stublookup.c:
	  ARMv7-A:  Add SYSCALL handling logic (2014-8-28).
	* nuttx/fs/, drivers/, and sched/:  Remove explicit references to errno.
	  That is a problem from within the kernel for certain configurations
	  (there are still more references to be fixed) (2014-8-28).
	* sched/clock/clock.h: In some configurations, g_system_tmer must be
	  extern'ed as a private variable in the OS (2014-8-28).
	* include/errno.h and nuttx/clock.h:  errno and g_system_timer must be
	  handled in a special way if there are external modules (2014-8-28).
	* include/sys/syscall.h: System definitions should depend on
	  CONFIG_LIB_SYSCALL not CONFIG_NUTTX_KERNEL (2014-8-28).
	* arch/arm/src/armv7-a: Rename syscall.h to svcall.h to work around
	  some include path name collisions; fix some compilation errors in
	  SYSCALL logic when debug is enabled (2014-8-29).
	* arch/arm/include/arm/syscall.h and armv7-a/syscall.h: Fix ARM7/9
	  and Cortex-A SYSCALLs:  For threads in SVC mode, the SVC instructions
	  clobbers R14.  This must be taken account in the inline assembly
	  (2014-8029).
	* arch/arm/src/armv7-a/arm_syscall.c: Fix hard coded values in
	  dispatch_syscall() inline assembly. Back out/correct part of last
	  change; that was going the wrong direction.  With this change, the
	  apps/examples/elf test works with address environments and call
	  gates! (2014-8029).
	* Many, many files:  Renamed CONFIG_NUTTX_KERNEL to CONFIG_BUILD_PROTECTED.
	  Added configuration CONFIG_BUILD_KERNEL that will be used to generate
	  a kernel (only) with full process support and will execute programs
	  only from a file system.  This new configuration is defined but only
	  partially integrated (2014-8-29).
	* tools/refresh.sh: Add a tool to make refreshing configurations easier
	  when you want to do a lot of them (2014-8-29).
	* tools/mksyscall.c: Build syscalls that do not need header files (there
	  are none, however) (2014-8-30).
	* include/nuttx/errno.h syscall/syscall.csv and syscall_funclookup.c:
	  Yet more issues with errno access via syscalls fixed (2014-8-30).
	* Makefile.unix, Makefile.win, Directories.mk, FlatLibs.mk, ProtectedLibs.mk,
	  and KernelLibs.mk:  Separate the common directory selection logic
	  into Directories.mk; add support for kernel build.  Move library
	  selection logic in common *.mk files, one each for flat-, protected-,
	  and kernel- mode builds (2014-8-30).
	* include/nuttx/syscall.h syscall/syscall.csv: clock_systimer needs the
	  same fix as for get/set_errno when used with system calls (2014-8-30).
	* sched/Kconfig sched/init/os_bringup.c tools/cfgdefine.c: Add
	  configuration options to start the system from a program on a file
	  system (2014-8-30).
	* mm/ and include/nuttx/mm.h: Remove CONFIG_MM_MULTIHEAP.  Non-multiheap
	  operation is no longer supported (2014-8-31).
	* configs/sama5d4-ek/kernel: Add a configuration for testing the
	  kernel build configuration (still a work in progress) (2014-8-31).
	* include/nuttx/arch.h, kmalloc.h, mm.h, sched/init/os_start.c,
	  sched/sched_free.c, and arch/arm/src/sama5/sam_allocateheap.c: Clean
	  up some kernel build heap allocation issues.  The Cortex-A kernel
	  build now compiles without errors (but cannot link until brk() and
	  sbrk() are implemented) (2014-8-31).
	* mm/*mm_brkaddr.c, *mm_extend.c, Makefile, and include/nuttx/mm.h: Add
	  low-level memory management hooks that will be needed to support brk()
	  and sbrk() (2014-8-31).
	* Rename krealloc() to kmm_realloc() and kmemalign to kmm_memalign() for
	  consistency with the rest of the naming (2014-8-31).
	* Rename kurealloc() to kumm_realloc(), kumemalign to kumm_memalign(),
	  and kufree to kumm_free for consistency with the rest of the naming
	  (2014-8-31).
	* Rename kumalloc() to kumm_malloc() and kuzalloc to kumm_zalloc() for
	  consistency with the rest of the naming (2014-8-31).
	* Rename kmalloc() to kmm_malloc(), kzalloc() to kmm_zalloc(), and
	  kfree() to kmm_free() and kuzalloc to kumm_zalloc() for consistency
	  with the rest of the naming (2014-8-31).
	* mm/mm_sbrk.c, kmm_sbrk.c, umm_sbrk.c, and include/unistd.h: Initial
	  implementation of sbrk() (2014-9-1).
	* arch/arm/src/armv7-a/arm_pgalloc.c, mm/umm_malloc.c, and mm_zalloc.c:
	  Completes the implementation of sbrk() (untested) (2014-9-1).
	* configs/cc3200-launchpad:  Updates to the CC3200-Launchpad configuration
	  for better compatibility.  From Jim Ewing (2014-9-1).
	* Removed all support from the 8051 from the NuttX source tree.  The
	  obsoleted code along with the removal patch can now be found at
	  misc/Obsoleted/ (2014-9-1).
	* sched/sched/sched_releasetcb.c and task_setup.c, include/nuttx/arch.h
	  and sched.h, and arch/*/*/*/Make.defs:  There used to be two ways to
	  pass parameters to new tasks, depending upon the configuration:  Either
	  (1) argv[] as created as an array with each string strdup'ed.  Or (1)
	  argv[] array and strings were created on the stack before the new task
	  was started.   Now, there is only one way, way (1).  Way (2) might be
	  slightly more compact, but this is not worth carry the complexity of
	  two different ways of doing the same thing (2014-9-1).
	* sched/init/os_start.c: Fix error in initialize of IDLE TCB due to last
	  change.  The argument list is no long in the TCB, but in the stack.
	  But not for the IDLE task.  It needs its own mini-argv[] list so that
	  it looks more like other threads (2014-9-1).
	* arch/arm/src/armv7-a/arm_addrenv.c, include/nuttx/addrenv.h, and
	  mm/umm_*.c: Space at the beginning of the process data space is now
	  reserved for user heap management structures.  In the kernel build
	  mode, these heap structures are shared between the kernel and use
	  code in order to allocate user-specific data (2014-9-2).
	* include/unistd.h, nuttx/mm.h, and kmalloc.h, sched/init/os_start.c
	  and sched/sched/sched_free.c, mm/kmm_sbrk.c and mm_sbrk.c, and
	  arch/arm/src/sama5/sam_allocateheap.c:  Restructuring of build to
	  allow use of use-space allocators by kernel logic in the kernel
	  build (2014-9-2).
	* arch/arm/include/armv7-a/irq.h, arm_syscall.c, crt0.c,
	  include/nuttx/addrenv.h, and mm/umm_*.c:  Add support for delivery
	  of use-mode signals in the kernel build (2014-9-2).
	* mm/mm_graninit.c: Granule allocator initialization uses wrong
	  allocator to setting aside kernel memory (2014-9-3).
	* sched/init/os_start.c: IDLE TCB setup needs to indicate that the
	  IDLE thread is a privileged, kernel thread (2014-9-3).
	* include/nuttx/sched.h: Add a flag to group structure:  If the group
	  is created by a kernel thread, then all resources in the group must
	  be privileged (2014-9-3).
	* sched/group/group_malloc.c, group_zalloc.c, group_free.c,
	  group_create.c, group.h: Group creation logic must use new group flag
	  when allocating resources so that the privileges on the resource are
	  set correctly (2014-9-3).
	* sched/Kconfig and sched/init/os_bringup.c: Add capability to perform
	  initial board initialization on a separate worker thread (2014-9-3).
	* tools/mkexport.sh: Fix 'make export'.  Adding subdirectories to the
	  sched/ directory broke the header file collection logic (2014-9-4).
	* Makefile.unix, Makefile.win, FlatLibs.mk, KernelLibs.mk, and
	  ProtectedLibs.mk: In the kernel or protected builds, only the user
	  libraries should be exported (2014-9-4).
	* Makefile.unix, Makefile.win, and tools/mkexport.sh: In 'make export',
	  do not copy internal header files or build scripts if this is a
	  kernel or protected build (014-9-4).
	* tools/mkexport.sh, arch/*/src/Makefile, arm/src/a1x/Make.defs,
	  sama5/Make.defs, armv7-a/crt0.c:  The 'make export' target needs to
	  bundle up the user C startup file (crt0), not the kernel head object
	  for the kernel and protected builds (2014-9-4).
	* tools/mkexport.sh: Add .config file to export package (2014-9-5).
	* configs/16z:  Support for this board has been removed from the NuttX
	  source tree (but still can be found in the misc/Obsoleted directory).
	  This port is not ready for usage but may return to the NuttX tree
	  at some point in the future (2014-9-5).
	* tools/Makefile.export and mkexport.sh: The apps/ import build requires
	  that we extract more information from the platform Make.defs file
	  (2014-9-5).
	* tools/Makefile.export and mkexport.sh: Need to export the setting of
	  WINTOOL as well (2014-9-5).
	* SAMA5D4-EK kernel configuration now builds NSH instead of examples/elf
	  (2014-9-6).
	* libc/pthread/pthread_attrinit.c, sched/pthread/pthread_create.c, and
	  include/nuttx/pthread.h:  Fix some conditional compilation in kernel
	  build mode.  And, while we are touching this logic, make
	  g_default_pthread_attr const (2014-9-7).
	* arch/arm/src/armv7-a/arm_addrenv.c: Correct size comparison (pages vs.
	  sections) (2014-9-7).
	* configs/sama5d4-ek/src/sam_bringup.c and sama5d4-ek.h:  Need to call
	  elf_initialize() on bring-up before attempting to load ELF modules
	  (2014-9-7).
	* arch/arm/src/armv7-a/arm_addrenv.c: Fix loop counter... was overrunning
	  a table on larger ELF files (2104-9-7).
	* arch/arm/src/sama5/sam_memories.c, sam_pgalloc.c, and sam_pgalloc.h: In
	  kernel build with address environment, need logic to map user virtual
	  addresses to physical addresses, and vice versa (2104-9-7).
	* SAM3X/Arduino Due: Fix typo in sam3x_periphclks.h; add SCLK
	  definitions to board.h header file.  From Fabien Comte (2014-9-8).
	* Several pthread interfaces: Add const storage class to to phthread
	  parameters.  From Freddie Chopin (2014-9-8).
	* libc/math: Corrected atan2 implementations from Denis Arnst (2014-9-8).
	* sama5d4-ek/knsh:  Rename the kernel configuration to knsh to better
	  match the naming used with other platforms (2014-9-8).
	* configs/cc3200-launchpad/README.txt: Add README file for the CC3200
	  Launchpad (2014-9-9).
	* configs/sama5d4-ek/README.txt, Kconfig, knsh/defconfig.ROMFS,
	  src/sam_bringup.c, and sama5d4-ek.h: SAMA5D4-EK kernel config can now
	  boot from a ROMFS file system (2014-9-9).
	* LibTargets.mk, Makefile.unix, and Makefile.win: Move common library
	  targets out of Makefile.unix and Makefile.win into a new LibTargets.mk
	  (2014-9-9).
	* LibTargets.mk and configs/sama5d4-ek/knsh/Make.defs: Add logic that will
	  permit us to build user libraries with different CFLAGS than kernel
	  code.  This is needed because we need the -fno-common option when
	  building ELF code to prevent SHN_COMMON relocations (2014-9-8).
	* binfmt/libelf/libelf_symbols.c, libelf_bind.c, and all implementations
	  of up_relocate(): ELF relocations.  Some relocation types do not have
	  a named symbol associated with them.  The design did not account for
	  that case (2014-9-9).
	* binfmt/binfmt_execmodule.c: When allocating a stack for a new process
	  using the user-space allocator, need to select the address environment
	  first (2014-9-9).
	* arch/Kconfig, arm/src/armv7-a/pginline.h, arm_addrenv.c, and
	  arm_pgalloc.c and include/nuttx/addrenv.h: Add configuration to use
	  the fixed DRAM mapping for the page pool (if available) instead of
	  remapping dynamically to access L2 page tables and page data.  Also,
	  add logic in address environment creation to initialize the shared
	  data at the beginning of the .bss/.data process memory region
	  (2014-9-10).
	* configs/sama5d4-ek/elf and knsh: These configurations now use the
	  fixed DRAM mapping for manipulating the page memory pool (2014-9-10).
	* arch/arm/include/arch.h and src/armv7-a/arm_addrenv.c,
	  nuttx/binfmt/binfmt_execmodule.c, libelf/libelf_addrenv.c,
	  libelf_load.c, libnxflat/libnxflat_addrenv.c, include/nuttx/arch.h, and
 	  mm/umm_initialize.c:  Add logic to initialize the per-process user
	  heap when each user process is started (2014-9-10).
	* sched/clock/clock.h, clock_initialize.c, and clock_settime.c: Remove
	  vestiges of g_tickbias; apply bias instead to g_basetime (2014-9-10).
	* include/nuttx/lib.h, sched/init/os_start.c, and
	  configs/ea3131/locked/mklocked.sh: Replace the empty lib_initialize()
	  function with a pre-processor macro (2014-9-11).
	* libc/misc/lib_stream.c: When a privileged thread exits, we have to use
	  the kernel allocator to free memory; when an unprivileged thread exits,
	  we don't have to do anything... heap memory will be cleaned up when the
	  address environment is torn down (2014-9-11).
	* arch/arm/src/stm32/stm32_serial.c and chip/stm32f20xxx_rcc.h: Fix for
	  UART7 and UART8 on STM32 clock enable from Aton (2014-9-11).
	* arch/arm/src/armv7-a/arm_vectors.S: ARMv7-A: Exception register
	  save/restore needs to work a little differently if we support user
	  mode processes (2014-9-11).
	* configs/cc3200-launchpad/src/cc3200_leds.c and other board files: Add
	  LED support for the CC3200 Launchpad.  From Jim Ewing (2014-9-11).
	* arch/arm/src/armv7-a/arm_initialstate.c:  All tasks, even user mode
	  tasks, must start in supervisor mode until they get past the start-up
	  trampoline (2014-9-11).
	* arch/arm/src/armv7-a/arm_vectors.S: Fix logic for returning from
	  exceptions to user-mode contexts.  NuttX processes are now functional
	  on the Cortex-A (2014-9-11).
	* arch/arm/src/armv7-a/arm_fullcontextrestore.S, arm_syscall.c, crt0.c,
	  and svcall.h: Modify up_fullcontextrestore() for CONFIG_BUILD_KERNEL.
	  It changed CPSR while in kernel.  That will crash if the new CPSR is
	  user mode while executing in kernel space.  Fixed by adding a
	  SYS_context_restore system call.  There is an alternative, simpler
	  modification to up_fullcontextrestore() that could have been done:  It
	  might have been possible to use the SPSR instead of the CPRSR and then
	  do an exception return from up_fullcontextrestore().  That would be
	  more efficient, but I never tried it (2014-9-12).
	* binfmt/libelf/libelf_load.c: ELF: Critical bugfix.. BSS was not being
	  cleared (2014-9-12).
	* configs/sama5d4-ek/knsh/defconfig and defconfig.ROMFS: Enable NSH
	  file applications in these configurations (2014-9-12).
	* libc/Kconfig, unistd/lib_execsymtab.c, configs/sim/nsh/defconfig, and
	  stm32f4discovery/posix_spawn/defconfig: Having a symbol table is an
	  option.  There are no symbol tables with CONFIG_BUILD_KERNEL, for
	  example (2014-9-12).
	* syscall/syscall.csv and include/sys/syscall.h: exevc, execvl,
	  posix_spawn, and posix_spawnp were not properly integrated as system
	  calls (2014-9-12).
	* syscall/syscall_lookup.h: Fix typos in the stub lookup table
	  (2014-9-12).
	* configs/stm32f4discovery/netnsh, Kconfig, README.txt, and
	  include/board.h: Add the network enabled NSH configuration for the
	  STM32F4Discovery board with the STM32F4DIS-BB base board installed
	  (2014-9-13).
	* nuttx/mm/umm_sbrk.c: Fix a typo in use of a configuration setting
	  (2014-9-13).
	* configs/stm32f4discovery/README.txt: Add STM32F4DIS-BB GPIO pin
	  usage (2014-9-13).
	* arch/Kconfig, arch/arm/include/arch.h, src/armv7-a/arm_addrenv.c,
	  sama5/sam_pgalloc.c, and include/nuttx/addrenv.h: Add a configuration
	  option for dynamic stack management (stack management not yet
	  implemented) (2014-9-13).
	* arch/Kconfig arm/src/armv7-a/addrenv.h, arm_addrenv.c, and
	  arm_addrenv_utils.c, a1x/Make.defs, and sama5/Make.defs,
	  include/nuttx/addrenv.h and arch.h: Move static helper routines from
	  arm_addrenv.c and may them global so that they can be shared by
	  forthcoming stack address environment logic (2014-9-13).
	* arch/arm/src/armv7-a/arm_addrenv_stack.c, arm_addrenv.c,
	  a1x/Make.defs, sama5/Make.defs, and include/nuttx/arch.h: Add logic
	  needed to manage a virtualized stack.  Not yet incorporated into
	  base OS logic (2014-9-13).
	* sched/task/task_posixspawn.c: Kernel proxy thread should be a kernel
	  thread, not a user task (2014-9-14).
	* include/sched.h and spawn.h, libc/Kconfig, spawn/Make.defs,
	  lib_psa_getstacksize.c, lib_psa_init.c, and lib_psa_setstacksize.c,
	  sched/task/Make.defs, task_create.c, and task_spawn.c: Don't build
	  task_create() or task_spawn() interfaces if there is an address
	  environment (2014-9-14).
	* arch/arm/src/armv7-a/arm_addrenv_ustack.c, include/nuttx/addrenv.h,
	  arch.h, and other files: Rename everything associated with the dynamic
	  process stack to ustack to make room in the name space for a kstack
	  (2014-9-14).
	* arch/arm/src/armv7-a/arm_addrenv_kstack.c, include/nuttx/addrenv.h,
	  arch.h, and other files:  Add the initial implementation of the process
	  kernel stack logic.  Not yet integrated into the main OS logic nor
	  tested (2014-9-14).
	* binfmt/binfmt_execsymtab.c and Makefile, sched/task/task_execv.c,
	  task_posixspawn.c, and Make.defs, include/unistd.h,
	  include/nuttx/binfmt/symtab.h, and libc/unistd/Make.defs: execv() is
	  a basic system interface.  It should not be in libc/ but rather in
	  sched/task.  Its symbol table helper logic also belongs in the kernel
	  but belongs in binfmt/ with the other symbol table logic (2014-9-15).
	* include/sys/syscall.h, syscall/syscall.csv, syscall_lookup.h, and
	  syscall_stublookup.c:  execl() is not a system interface.  It belongs
	  in libc and should not have a system call associated with it
	  (2014-9-15).
	* arch/arm/include/armv7-a/irq.h and src/armv7-a/arm_syscall.c: If we
	  are configured to use a kernel stack while in SYSCALL handling, then
	  we need to switch back to the user stack to deliver a signal (2014-9-15).
	* arch/arm/src/armv6-m/up_svcall.c, armv7-a/arm_syscall.c, and
	  armv7-m/up_svcall.c: Fix a typo in system call when fetching parameter
	  from the stack:  regs[REG_PC]+4 is the address, not regs[REG_PC+4]
	  (2014-9-15).
	* sched/sched/sched_releasetcb.c: Don't release user stack in kernel
	  build.  Already destroyed with all of the address environment
	  (2014-9-15).
	* arch/arm/src/armv6-m/up_signal_dispatch.c, src/armv7-a/arm_signal_dispatch.c,
	  and arch/arm/src/armv7-m/up_signal_dispatch.c:  Move
	  common/up_signal_dispatch.c to armv6-m, armv7-m, and armv7-a.  The
	  armv7-a version needs to be different to handle the case where we
	  are dispatch kernel mode signals when running under a user mode group
	  (2014-9-16).
	* arch/arm/src/armv7-a/arm_syscall.c: Correct stack handling if signal
	  deliver to user processes (2014-9-16).
	* arch/arm/src/armv7-a/arm_physpgaddr.c, pgalloc.h, sama5/sam_pgalloc.c,
	  and sam_pgalloc.h: Move some share-able logic from sama5/sam_pgalloc.c
	  to armv7-a/arm_physpgaddr.c (2014-9-16).
	* arch/arm/src/sam34/sam_rtt.c: Only SAM4 family has RTTDIS bit in the
	  MR register. SourceForge bug #33 from Fabien Comte (2014-9-17).
	* arch/arm/src/stm32/stm32_can.c: At the end of the interrupt handler,
	  the interrupts were being disabled, if all packets have been
	  transferred when the interrupt handler was invoked. This is
	  problematic, because the interrupt handler calls can_txdone of the
	  upper half which can enqueue new packets to send. Removed the block
	  altogether, because can_txdone calls can_xmit which disables
	  interrupts if there are no new packets to send.  From  Daniel Lazlo
	  Sitzer (2014-9-17).
	* drivers/can.c: In can_txdone, waiters on the semaphore should be
	  informed regardless of the return value of can_xmit. First it returns
	  -EIO if there are no new packets, and second the information of the
	  waiters is about the last transferred packet.  From  Daniel Lazlo
	  Sitzer (2014-9-17).
	* SAMA5D4-EK:  Add documentation/support for Rev E. board. Refresh NSH
	  configuration.  Fix some build errors/warnings introduced with recent
	  work with the knsh configuration (2014-9-17).
	* arch/sim/Kconfig, src/up_spiflash.c, Makefile, up_initialize.c, and
	  up_internal.h: Emulated SPI FLASH driver for the sim target from Ken
	  Pettit (2014-9-19).
	* configs/stm32f4discovery/include/board.h, netnsh/defconfig,
	  src/Makefile, stm32_sdio.c, stm32_boot.c, stm32_nsh.c,
	  stm32_bringup.c, and stm32f4discovery.h: STM32F4Discovery:  Add
	  support for the microSD card slot on the STM32F4DIS-BB base board
	  (2014-9-20).
	* Change all occurrences of NxConsole to NxTerm (2014-9-20).
	* include/sys/ipc.h, shm.h, mman.h, and types.h: Add shared memory
	  definitions, types, prototypes (2014-9-22).
	* fs/smartfs/smartfs_smart.c: SMART FS update from Ken Pettit
	  (2014-9-22).
	* mm/mm_gran/:  Move granule allocator and page allocator from mm/. to
	  mm/mm_gran/. (2014-9-22).
	* mm/kmm_heap/:  Move kernel heap allocator from mm/. to mm/kmm_heap/.
	  (2014-9-22).
	* mm/umm_heap/:  Move user heap allocator from mm/. to mm/umm_heap/.
	  (2014-9-22).
	* mm/mm_heap/:  Move common heap logic from mm/. to mm/mm_heap/.
	  (2014-9-22).
	* mm/shm/:  Create a home for forthcoming shared memory logic
	  (2014-9-22).
	* fs/procfs/fs_procfs.c: Fix some procfs breakage introduced by
	  reorganizing some un-reorganizable data structures.  From Ken
	  Pettit (2014-9-22).
	* drivers/mtd/smart.c, fs/smartfs/smartfs.h, smartfs_procfs.c, and
	  smartfs_utils.c, include/nuttx/fs/ioctl.h, and mtd/smart.h: Updated
	  SMART FS procfs support.  From Ken Pettit
	* configs/mikroe-stm32f4: Fix a few compile bugs and minor corrections
	  to the mikroe-stm32f4 configuration source.  From Ken Pettit
	  (2014-9-22).
	* mm/Kconfig, shm/Make.defs, shmat.c, shmctl.c, shmdt.c, shmget.c, and
	  Documentation/NuttxUserGuide.html: Add the documentation, build
	  framework, and skeleton files for the shared memory feature (no logic
	  yet provided) (2014-9-22).
	* include/sys/syscall.h, syscall/syscall.csv, syscall_lookup.h, and
	  syscall_stublookup.c: Add system calls for shared memory interfaces
	  (2014-9-22).
	* include/nuttx/shm.h, mm/shm/shm.h, and shm_initialize.c: Add shared
	  memory initialization logic (2014-9-23).
	* include/nuttx/arch.h, Documentation/NuttxPortingGuide.html, and
	  NuttxUserGuide.html: Add platform-specific interface definitions
	  needed to support the shared memory feature (2014-9-23).
	* arch/arm/include/arch.h, src/armv7-a/addrenv.h, arm_addrenv.c,
	  arm_addrenv_ustack.c, and arm_addrenv_utils.c: Add logic necessary
	  to handle remapping of shared memory on context switches (2014-9-23).
	* include/nuttx/gran.h, mm/mm_gran/mm_granrelease.c, and Make.defs: Add
	  interfaces to support un-initializing a granule allocator (2014-9-23).
	* arch/arm/src/armv7-a/arm_pgalloc.cm  sched/group/group_addrenv.c, and
	  other files: Fix some inconsistent field name in struct task_group_s:
	  addrenv should be tg_addrenv (2014-9-23).
	* arch/arm/src/armv7-a/pgalloc.h: Extend virtual/physical address
	  conversions to include addresses in shared memory (2014-9-23).
	* include/nuttx/shm.h, sched.h, mm/shm/shm_initialize.c,
	  binfmt/binfmt_execmodule.c, sched/group/group_leave.c: Add support
	  for a per-process virtual page allocator.  This is a new member of
	  the task_group_s structure.  The allocator must be initialized when a
	  new user process is started and uninitialize when the process group
	  is finally destroyed.  It is used by shmat() and shmdt() to pick the
	  virtual address onto which to map the shared physical memory
	  (2014-9-23).
	* mm/shm/shmat.c and shmdt.c: Completes the implementation of the core
	  shared memory logic:  shmget(), shmctl(), shmat(), and shmdt().  This
	  is still some unfinished platform-specific code that needs to be done
	  before we can begin testing (2014-9-23).
	* include/nuttx/mm:  Move mm.h, gran.h, and shm.h from include/nuttx to
	  include/nuttx/mm (2014-9-24).
	* arch/arm/src/stm32/stm32_can.c: STM32 CAN correction suggested by Max
	  Holtzberg (2014-9-24).
	* arch/arm/src/armv7-a/addrenv.h, arm_addrenv_shm.c,
	  arm_addrenv_utils.c, and pgalloc.h: This completes the implementation
	  of shared memory support for the Cortex-A platforms (2014-9-24).
	* fs/fs_poll.c: Fix unnecessary delays and timing jitter in the
	  implementation of poll(): No delay if timeout is zero; If timeout is
	  greater than zero, first check if events are already pending events
	  before starting the delay.  From Johannes Hampel (2014-9-25).
	* drivers/mtd/at45db.c: In at45db_bwrite , the buffer is not increased
	  when writing more than 1 page.  Sourceforge bug #34 (2014-9-25).
	* crypto/cryptodev.c: Path segments reversed in include file path.
	  Noted by Brennan Ashton (2014-9-25).
	* drivers/mtd/mtd_rwbuffer.c:  The MTD Read-ahead/Write buffer layer
	  appears to be functional (2014-9-25).
	* libc/stdio/lib_libdtoa.c: Change to lib_dtoa() to fix precision error
	  from trailing zeroes.  From Bob Doiron (2014-9-26)
	* fs/fs_poll.c:  Re-implemented poll() delay using sem_timedwait()
	  (2014-9-26).

7.6 2014-11-26 Gregory Nutt <gnutt@nuttx.org>

	* fs/fs.h and other files:  Rename fs/fs_internal.h to fs/fs.h (2014-9-28).
	* include/nuttx/semaphore.h and fs/fs.h:  Add data structures that will
	  allow us to move name semaphore support out of the OS and into the
	  VFS (not complete) (2014-9-28).
	* fs/inode: Move inode and VFS utils from fs/. to fs/inode/. (2014-9-28).
	* fs/driver: Move driver logic from fs/. to fs/driver/. (2014-9-28).
	* fs/dirent: Move directory operations from fs/. to fs/dirent/. (2014-9-23).
	* fs/mount: Move mount-related files from fs/. to fs/mount/. (2014-9-23).
	* fs/vfs: Move renaming files in fs/. to fs/vfs/. (Don't all belong there)
	  (2014-9-23).
	* fs/semaphore: Create a build structure that will (eventually) support
	  using the VFS to manage named semaphores (2014-9-23).
	* configs/stm32f4discovery/include/board.h: STM32F4-Discovery: Fix some
	  backward conditional compilation (2104-9-29).
	* nuttx/sched/init/os_start.c, semaphore/Make.defs, sem_initialize.c,
	  and semaphore.h: Semaphore initialization is now only required if
	  priority inheritance is enabled (2014-9-29).
	* fs/Makefile and mqueue/: Add build support for messages queues as part
	  of the VFS (only build logic, no C files yet) (2014-9-29).
	* fs/inode/inode.h and fs/driver/driver.h:  Move fs/fs.h to fs/inode/inode.h
	  and some to fs/driver/driver.h (2014-9-29).
	* sched/task/task_vfork.c: Fix vfork().  Now that arguments are kept on
	  the stack, the way that arguments are passed from parent to child in
	  vfork() must change.  This bug has always been present, but was not
	  visible with the old strdup() way of passing arguments (2014-9-29).
	* arch/arm/src/common/up_vfork.c: Another vfork() problem: If we get to
	  vfork() via system call, then we need to clone some system call
	  information so that the return form the cloned system call works
	  correctly (2014-9-29).
	* fs/mqueue: Move mq_open(), mq_close(), and mq_unlink() logic from
	  sched/mqueue to fs/mqueue.  Convert the logic so that it uses the VFS to
	  managed the message queue namespace (instead of custom logic).  By
	  default, now message queues can be seen in /var/mqueue (2014-9-29).
	* arch/sim/src/up_simuart.c, up_uartwait.c:  Removed old, strange
	  up_stdio.c and implemented a simulated UART driver to provide the
	  console input.  Starts a separate, Linux domain pthread to read
	  the console input in raw mode and provides the incoming data to
	  NuttX via standard NuttX domain IPCs (2014-9-30).
	* arch/sim/src/up_setjmp32.S, up_setjmp64.S, Kconfig, Makefile,
	  up_initialstate.c, up_internal.h, up_stackframe.c, and include/irq.h:
	  Add support for 64-bit longjmp/setjmp in simulator platform.  This
	  will permit operation of the simulation natively on a 64-bit platform
	  (2014-10-2).
	* include/fcntl.h: Implement create() as a macro (2014-10-4).
	* fs/vfs/Make.defs,  fs_pread.c fs_pwrite.c, and include/unistd.h: Add
	  pread() and pwrite() (2014-10-4).
	* include/sys/syscall.h syscall/syscall.csv, syscall_lookup.h, and
	  syscall_stublookup.c: Add pread() and pwrite() system calls
	  (2014-10-4).
	* include/aio.h:  Add aio.h header file (2014-10-4).
	* libc/aio/lio_listio.c and Make.defs: Add empty skeleton file where
	  lio_listio() will eventually be implemented (2014-10-4).
	* libc/Kconfig, aio/aio_read.c, aio_write.c, aio_return.c, aio_error.c
	  aio.h, and Make.defs: Initial implementation of aio_read(),
	  aio_write(), aio_return(), and aio_error() (2014-10-4).
	* include/signal.h and sched/Kconfig:  Add definitions for SIGPOLL
	  (2014-9-5).
	* libc/aio/aio_signal.c, Make.defs, and aio.h: Move AIO signal logic
	  to a common location in aio_signal.c.  Also fix several typos
	  (2014-9-5).
	* libc/aio/aio_suspend.c, aio_cancel.c, aio_fsync.c, lio_listio.c and
	  Make.defs:  Initial implementation of aio_suspend(), aio_cancel(),
	  lio_listio.c, and aio_fsync.c.  This completes this implementation
	  of the asynchronous I/O interfaces but there are still untested
	  (2014-9-5).
	* fs/aio/Make.defs, aio.h, aio_cancel.c, aio_fsync.c, aio_read.c,
	  aio_signal.c, and aio_write.c: Move all file operations from libc/aio
	  to fs/aio.  These will need to be kernel routines in order to
	  handler issues with using file descriptors on worker thread
	  (2014-10-5).
	* fs/aio/aio.h, Kconfig, aio_initialize.c, aioc_contain.c, Make.defs,
	  and include/aio.h: Add a AIO control container to increase the
	  payload with OS internal stuff (2014-10-6).
	* fs/aio/aio_cancel.c, aio_fsync.c, aio_read.c, aio_signal.c, and
	  aio_write.c: Modify logic to use AIO control block container
	  (2014-10-6).
	* fs/fs_initialize.c, Makefile, fs/inode/fs_inode.c, and inode.h:
	  Modify FS initialization logic to handle AIO container
	  initialization (2014-10-6).
	* Too many files to list:  Major structuring of file system functions
	  to better support asynchronous I/O.  Repository should not be
	  trusted until I have a chance to verify everything (2014-10-6).
	* include/nuttx/mm/mm.h: Fix a place in the memory manager where it
	  explicitly assumed that the size of a pointer is 4 bytes.  That is OK
	  if the actual size is smaller but makes the heap unstable when used
	  with the x86_64 host simulation (2014-10-6).
	* sched/wqueue, include/nuttx/wqueue.h,  and libc/Kconfig sched/Makefile:
	  Add support for priority inheritance on the low priority worker queue
	  (2014-10-7).
	* sched/Makefile and sched/*/Make.defs: Simplify how C source files are
	  selected in the build (2014-10-7).
	* fs/aio/aio_queue.c, Make.defs, aio.h, aio_fsync.c, aio_read.c, and
	  aio_write.c: The asynch I/O implementation now satisfies POSIX
	  priority requirements; it uses the new low priority worker thread
	  interfaces to adjust the priority of the worker thread according to
	  the priority of the client thread (2014-10-7).
	* arch/arm/src/stm32/chip/stm32_otghs.hstm32_otghs.c/h and
	  chip/stm32_otghs.h: Add files that implement true high speed support
	  for the STM32 OTGHS peripheral.  From Brennan Ashton (2014-10-7).
	* arch/arm/src/stm32/ (several files):  Integrates OTGHS support into
	  the STM32; Eliminates the older OTGHS in FS mode logic.  From Brennan
	  Ashton (2014-10-7).
	* arch/arm/src/stm32/Kconfig, stm32_otgfsdev.c, chip/stm32f40xxx_pinmap.h,
	  configs/stm32f429i-disco/ (several files): Remove non-functional
	  vestiges of OTGHS in FS mode (including OTGFS2); try to convert the
	  stm32f429i-disco configuration to use OTGHS instead of OTFHS in F
	  mode (OTGFS2).  But I don't have the boards and can't test (2014-10-7).
	* include/syslog.h, debug.h, libc/libc.csv, misc/lib_dbg.c,
	  lib_dumpbuffer.c, stdio/lib_lowsyslog.c, lib_printf.c, lib_syslog.c,
	  and fs/driver/fs_syslog.c: Make standard syslog and vsyslog POSIX
	  compliant (also modify non-standard syslog functions for
	  compatibility).  This will break a lot of things until ALL usage of
	  syslog is updated to use the modified interfaces (2014-10-8).
	* drivers/: Correct everything under nuttx/drivers, nuttx/arch, nuttx/net,
	  nuttx/binfmt, and nuttx/configs to use the corrected syslog interfaces
	  (2014-10-8).
	* libc/syslog and fs/syslog: Move syslog logic from libc/misc and
	  libc/stdio to libc/syslog and fs/syslog.  Also move some syslog logic
	  from fs/driver to fs/syslog (2014-10-8).
	* fs/syslog/fs_syslogmask.c:  Implement syslogmask() (2014-10-8).
	* include/sys/syscall.h, syscall/syscall.csv, syscall_lookup.h, and
	  syscall_stublookup.c:  Add syslog system calls (2014-10-8).
	* fs/Kconfig, syslog/fs_syslogenable, and include/syslog.h:  Remove
	  non-standard, conditional syslog_enable(), instead only the
	  required, standard setlogmask() (2014-10-9).
	* arch/arm/src/stm32/chip/stm32_exti.h: Correct STM32 RTC EXTI bit
	  definition.  From Lazlo (2014-10-9).
	* include/syscall.h, syscall/, and libc/: Remove syslog interfaces
	  from the set of system calls (2014-10-9).
	* libc/syslog: Move syslog back out of the kernel into the C libary
	  (2014-10-9).
	* arch/mips/src/pic32mx/pic32mx-devcfg.h: For PIC32MX7, DEVCFG0 bit
	  2 must be set.  Writing bit 2 as zero can brick the CPU on some
	  versions.  From Cris Kvist (2014-10-9).
	* sched/wqueue/, libc/wqueue, and include/nuttx/wqeueue.h:  Separate
	  kernel- and user-mode work queue logic. Decouple work queue data
	  structures.  This is part of the preparation to support multiple
	  low-priority worker threads (2014-10-10).
	* include/nuttx/wqueue.h, libc/wqueue/Make.defs, work_usrthread.c,
	  work_usrstart.c sched/init/os_bringup.c wqueue/kwork_hpthread.c,
	  kwork_lpthread.c, and wqueue.h: Modularize starting of worker
	  threads to better isolate individual initialization characteristics
	  (2014-10-10).
	* arch/arm/src/ stm32_iwdg.c, stm32_wwdg.c, and chip/stm32_dbgmcu.h:
	  Fix watchdog stop bit usage.  From Lazlo (2014-10-10).
	* sched/wqueue/, libc/wqueue, and include/nuttx/wqueue.h:  Add support
	  for multiple low-priority worker threads.  This is a necessary
	  piece of the support for asynchronous I/O (2014-10-10).
	* sched/wqueue/work_inherit.c:  Add logic for priority inheritance with
	  multiple worker threads.  How should this work?  Tentatively, the all
	  get reprioritized together.  It would be best to just reprioritize the
	  single thread doing the high priority work, but we don't know which
	  that will be in advance (2014-10-10).
	* fs/aio/ and include/aio.h:  Add support for socket-based transfers
	  (2014-10-11).
	* arch/arm/include/stm32/chip.h, /src/stm32/Kconfig, and
	  stm32_allocateheap.c: Support for the STM32 F411RE from Serg Podtynnyi
	  (2014-10-14).
	* configs/Kconfig, README.txt, and nucleo-f401re:  Extend this board
	  configuration to also support the Nucleo-F411RE.  From Serg Podtynnyi
	  (2014-10-14).
	* tools/Config.mk:  Add a PRELINK macro to Config.mk.  From Kriegleder
	  (2014-10-17).
	* arch/arm/src/efm32 and arch/arm/include/efm32: Add a basic port for
	  the SiLabs EFM32 family.  Includes many files contributed by Pierre-noel
	  Bouteville (2104-10-20).
	* configs/efm32-gxxx-stk:  Add board support for the EFM32 Gecko Starter
	  Kit (2014-10-20).
	* configs/olimex-efm32g880f128-stk: Add board support for the Olimex
	  EFM32G8809128 STK (2014-10-20).
	* drivers/lcd/Kconfig, ili9341.c, Make.defs, and include/nuttx/lcd/ili9341.h:
	  Add support for a generic ILI9341 driver.  From Marco Krahl (2014-10-20).
	* configs/stm32f429i-disco/Kconfig, src/ and lcd/:  Add support for the
	  STM32F429i Discovery's LCD.  From Marco Krahl (2014-10-20).
	* arch/arm/src/lpc43xx/lpc43_gpioint.c, .h, lpc43_irq.c, and
	  chip/lpc43_gpio.h: Fixes to allow compile of lpc43_gpioint.c.  It
	  likely doesn't work.  From Brandon Warhurst (2014-10-21).
	* arch/arm/src/stm32/chip/stm32f103r_pinmap.h: Add ADC pinmap
	  definitions for the STM32 F103R from Martin Lederhilger  (2014-10-21).
	* arch/arm/src/armv7-m/up_itm.c and itm.h: Add CMSIS ITM header file and
	  library.  From Pierre-noel Bouteville (2104-10-21).
	* arch/arm/src/armv7-m/dwt.h and tpi.h: Add CMSIS DWT and TPI header files.
	  From Pierre-noel Bouteville (2104-10-21).
	* arch/arm/src/armv7-m/arm_item_syslog.c, itm_syslog.h, and Kconfig: Add
	  ARMv7 support to use ITM for SYSLOG debug output. Includes logic from
	  Pierre-noel Bouteville (2014-10-22).
	* arch/arm/src/efm32/efm32_clockconfig.c, efm32_start.c, and Make.defs:
	  Add logic to initialize and use ITM for syslog. Includes logic from
	  Pierre-noel Bouteville (2014-10-22).
	* sched/sched/sched_timerexpiration.c and include/nuttx/arch.h:  Fixes
	  to tickless operation code, especially in alarm mode.  From Brandon
	  Warhurst (2014-10-23).
	* nuttx/arch/arm/src/lpc43xx/lpc43_rit.c, lpc43_rit.h, and related
	  files: Add support for tickless operation using the NXP LPC43xx.  From
	  Brandon Warhurst (2014-10-23).
	* arch/arm/src/efm32/efm32_gpio.c and efm32_gpioirq.c: EFM32 port and
	  pin decoding backward in every case.  From  Pierre-Noel Bouteville
	  (2014-10-23).
	* arch/arm/src/armv7-m/up_itm_syslog.c:  Correct file naming and fix
	  compilation errors in up_itm_syslog.c.  From  Pierre-Noel Bouteville
	  (2014-10-23).
	* configs/sam4e-ek/src/sam_ethernet.c (and other files):SAM4E-EK: Add
	  support for PHY interrupt (2014-10-24).
	* include/wchar.h:  Add a mostly bogus wchar.h header file.  This file
	  is mostly bogus because none of the wide character operations are
	  currently supported in the Nuttx C library (2014-10-27).
	* include/termios.h, libc/termios/lib_isatty.c, and Make.defs: Add
	  isatty() function. From  Alan Carvalho de Assis (2014-10-27).
	* arch/arm/include/efm32, src/efm32, and configs/efm32-gxxx-stk:
	  The EFM32 Gecko Starter Kit port is now functional.  At least
	  NSH is running over LEUART0 on the board (2014-10-29).
	* arch/arm/src/sam34/sam_serial.c and Kconfig:  Add support for SAM3/4
	  basic TERMIOS and flow control.  There are issues with IFLOW control:
	  PDC or DMAC support is required (2014-10-29).
	* configs/sam4e-ek/src/sam4e-ek.h: Fix an error in a USART1 pin number
	  (2014-10-29).
	* configs/efm32gg-stk3700:  Board support for the SiLabs EFM32GG
	  Giant Gecko Starter kit.  Current with basic NSH configuration only.
	  Testing is on hold until I receive hardware (2014-11-03).
	* libc/Kconfig: Move CONFIG_NSH_TMPDIR to CONFIG_LIBC_TMPDIR (2014-11-05).
	* libc/stdlib/lib_mkstemp.c, lib_mktemp.c, Make.defs and include/stdlib.h:
	  Add mktemp() and mkstemp() (2014-11-05).
	* libc/stdio/lib_tempnam.c, lib_tmpnam.c, Kconfig, Make.defs and
	  include/stdio.h: Add tmpnam() and tempnam() (2014-11-05).
	* drivers/rwbuffer.c: Fix typo that can cause compiler error (2014-11-05).
	* drivers/mtd/m25px.c: Extend MTD support to M25P16. From Sébastien
	  Lorquet (2014-11-07).
	* arch/arm/src/stm32/Kconfig, chip.h, and include/stm32/chip.h: Support
	  for the STM32F103RG.  From Murilo Ponte (2014-11-10).
	* configs/stm32f100rc_generic:  Removed this generic board configuration.
	  I have decided to stop support of generic board configurations.  Generic
	  board configurations do not provide support for any specific hardware
	  but can be useful only if there are not other examples for the setup
	  for a particular architecture. Not the case here (2014-11-10).
	* include/nuttx/vt100.h: Add foreground and background color commands
	  (2014-11-10).
	* sched/wdog/wd_create.c: Fix an important bug in the watchdog creation
	  logic (2014-11-10).
	* include/unistd.h, libc/unistd/lib_access.c and Make.defs: From Lorenz
	  Meier: The implementation of access() as vararg macro has the issue that
	  any function call with the same name (even in a C++ class) will match
	  with it and result in a compile error. I have replaced it with a small
	  function, and tried to have decent documentation as well. This resolves
	  the compile issue, and shouldn’t have negative side effects for users
	  of the function (2014-11-11).
	* mm/mm_gran/mm_granrelease.c:  If the INTR granule allocator mode is
	  enabled, there is no semaphore to destroy.  From Lorenz Meier (2014-11-12).
	* fs/nxffs/nxffs_dump.c: Fix problems with redefinitions of fdb macro.
	  With the fix to the syslog prototype, a LOG priority must now be the
	  first parameter.  Fixed by replacing all occurrences of fdbg with
	  syslog(LOG_DEBUG, and eliminating the macro redefinitions.  Noted by
	  Sebastien Lorquet (2014-11-12).
	* arch/arm/src/common/up_internal.h: Add protection from C++ name
	  mangling in the ARM up_internal.h.  From Lorenz Meier (2014-11-12).
	* include/nuttx/compiler.h:  Defines inline functions as not
	  instrumented - this is relevant for anyone using instrumentation.  From
	  Lorenz Meier (2014-11-12).
	* libc/string/lib_strncpy.c:  The definition of strncpy() is that empty
	  space should be zero-filled, the patch adds the zero filling (I didn’t
	  know this, see e.g. the POSIX spec here:
	  http://pubs.opengroup.org/onlinepubs/7908799/xsh/strncpy.html). From
	  Lorenz Meier (2014-11-12).
	* arch/arm/include/limits.h:  Remove the definition of INT_FAST32_MIN
	  which is already defined in stdint.h (the correct location).  From
	  Lorenz Meier (2014-11-12).
	* arch/arm/src/efm32/efm32_clockconfig.c, configs/efm32gg-stk3700/README.txt
	  and include/board.h:  Fixes to get the EFM32GG-STK3700 basic NSH
	  configuration running.  It works! (2014-11-12).
	* drivers/bch/bchdev_driver.c: Add support for seeking in BCH.  From
	  Sébastien Lorquet. (2014-11-13).
	* sched/Kconfigs and configs/*/*/defconfig:  Remove CONFIG_MAX_TASK_ARGS
	  (2014-11-13).
	* binfmt/: Remove use of CONFIG_MAX_TASK_ARGS in exec() and unload_module()
	  (2014-11-13).
	* libc/unistd:  Remove use of CONFIG_MAX_TASK_ARGS in execl() (2014-11-13).
	* sched/: Remove some misc. usage of CONFIG_MAX_TASK_ARGS in task_start(),
	  task_setup(), and vfork() (2014-11-13).
	* arch/arm/src/stm32/chip/stm32_otgfs.h: Correct a typo in the STM32 OTGFS
	  register bit definitions (2014-11-13).
	* drivers/lcd/st7565.c/.h and include/nuttx/lcd/st7565.h: Add driver for
	  ST7565 that works with NHD�C12864KGZ display.  From Pierre-noel
	  Bouteville (2014-11-13).
	* net/route/net_router.c:  I don't think that the net_route function has
	  ever worked correctly.  The source ip was updated in the match struct
	  instead of the route ip.  From Brennan Ashton (2014-11-14).
	* net/Kconfig arp/Make.defs, arp_send.c, and drivers/net/slip.c: ARP:
	  Add support for the case where there are multiple networks:  One being
	  Ethernet and the other not.  Suggested by Brennan Ashton (2014-11-14).
	* net/Kconfig, netdev/netdev_register.c, arp/arp_send.c,
	  include/nuttx/net/net.h, netdev.h and several network drivers in arch/
	  and drivers/: Add a parameter to netdev_register() to indicate the
	  link protocol supported by the driver.  Use this value to replace some
	  logic committed yesterday (2014-11-15).
	* configs/stm32f4discovery/netnsh/defconfig:  Needs to set MAC address
	  (2014-11-15).
	* arch/ and drivers/: Remove use of NET_LL_HDRLEN from Ethernet drivers.
	  Use ETH_HDRLEN instead (2014-11-15).
	* net/arp/: Remove use of NET_LL_HDRLEN from net/arp logic.  Use
	  ETH_HDRLEN instead (2014-11-15).
	* net/ and include/nuttx/net:  All network logic will now handle
	  variable length link layer protocol headers within incoming packets.
	  This permits use of multiple network interfaces with differing data
	  links.  For example, ETHERNET + SLIP (2014-11-15).
	* arch/arm/src/sam34/sam4s_periphclks.h:  Add missing SPI0 clock
	  configuration macro for the SAM4S.  From spasbyspas (2014-11-16).
	* arch/arm/src/efm32/efm32_lowputc.c: EFM32 USART setup: Computation of
	  BAUD includes shift; Eliminate additional shift.  From  Pierre-noel
	  Bouteville (2014-11-16).
	* net/, include/, drivers/, arch/, various files:  Rename
	  CONFIG_NET_BUFSIZE to CONFIG_NET_ETH_MTU; Add CONFIG_NET_SLIP_MTU.
	  Add data structures and logic to handle different MTUs when both
	  Ethernet and SLIP are enabled (2014-11-16).
	* net/, include/, various files:  Rename CONFIG_NET_RECEIVE_WINDOW to
	  CONFIG_NET_ETH_TCP_RECVWNDO and CONFIG_NET_SLIP_TCP_RECVWNDO.  Add
	  data structures and logic to handler different TCP receive windows
	  when both Ethernet and SLIP are enabled (2014-11-16).
	* configs/sama5d4-ek/bridge: Add a simple test for the dual EMACs on
	  the SAMA5D4 (2014-11-17).
	* arch/arm/src/sama5/sam_emacb.c:  Fix several typos that will prevent
	  EMAC1 from initializing properly (2014-11-17).
	* include/nuttx/net/ip.h and tcp.h, net/icmp/icmp_send.c and
	  igmp/igmp_send.c: Move IP header flags from tcp.h to ip.h and rename
	  IP_FLAGS vs TCPFLAGS.  The problem fixed here is that there IP flags
	  were not available when TCP was disabled.  The IP flags are used in
	  ICMP and IGMP (2014-11-17).
	* sched/clock/clock_abstime2ticks.c: Calling mq_timedreceived() with
	  immediate timeout was getting stuck and not timing out. Immediate
	  timeout is achieved by setting absolute timeout value to past time,
	  for example abstime={ .tv_sec=0, .tv_nsec=0 }. However absolute
	  time was converted to relative time using unsigned integer arithmetic
	  and resulted large ticks count by clock_abstime2ticks, instead of
	  expected negative ticks value.  Change corrects clock_abstime2ticks()
	  to return negative ticks, if absolute time is in the past.  From
	  Jussi Kivilinna (2014-11-19).
	* fs/vfs/fs_poll.c: poll() was not waking up from signals (for example
	  mq_notify() events).  From Jussi Kivilinna (2014-11-19).
	* arch/arm/src/stm32/stm32_otghs.c, Make.defs,
	  configs/stm32f429i-disco/src/stm32_usb.c and Makefile: STM32 F4 OTGHS
	  device controller driver from Brennan Ashton (2014-11-20).
	* configs/sama5d3-xplained/bridge: Add a simple test for the EMAC
	  and GMAC on the SAMA5D3 working together (2014-11-20).
	* libnx/nxtk/nxtk_drawframe.c: Remove warnings when CONFIG_NXTK_BORDERWIDTH
	  is set to zero.  From Pierre-Noel Bouteville (2014-11-20).
	* fs/vfs/fs_poll.c: Add proper handling for sem_timedwait errnos.
	  From Jussi Kivilinna (2014-11-21).
	* net/udp/udp_conn.c and udp.h:  Extensions to UDP "connection" structure
	  for the case of multiple networks.  In this case, assigned port numbers
	  only have to be unique with respect to the IP address.  So, for
	  example, you could have multiple port 80's, one on each network
	  (2014-11-21).
	* net/tcp/tcp_conn.c and tcp.h: Make tcp_listener static scope; it is
	  not used outside of tcp_conn.c (2014-11-22).
	* net/udp/tcp_conn.c and tcp.h:  Extensions to TCP connection structure
	  for the case of multiple networks.  See the description of the similar
	  change for UDP above (2014-11-22).
	* net/route/net_router.c:  Refuse to perform routing table lookups for
	  the Broadcast IP address.  From Brennan Ashton.
	* net/netdev/netdev_findbyaddr.c and netdev:  Add logic to netdev_findbyaddr()
	  to return the correct network device for the case where a broadcast
	  address is used.  This change caused trivial ripples through other
	  files because additional parameters are required for netdev_findbyaddr()
	  when CONFIG_NET_MULTINIC.  Those other file include net/netdev/netdev_rxnotify.c,
	  netdev_txnotify.c which, in turn, for changes to arp/arp_send.c,
	  icmp/icmp_ping.c, socket/net_sendfile.c, recvfrom.c, sendto.c,
	  tcp/tcp_send_buffered.c, and tcp_send_unbuffered.c (2014-11-23).
	* arch/arm/src/kl/chip/kl_i2c.h:  I2C header file for the Freescale KL
	  family.  From Alan Carvalho de Assis (2014-11-23).
	* include/nuttx/fs/fs.h: Fix typo in conditional compilation.  From
	  Alan Carvalho de Assis (2014-11-23).

7.7 2015-01-26 Gregory Nutt <gnutt@nuttx.org>

	* nuttx/drivers/eeprom and include/nuttx/eeprom/: Add support for generic
	  EEPROM access via a character driver.  Add also the EEPROM driver itself.
	  From Sébastien Lorquet (2014-11-26).
	* libnx/nxfonts/nxfonts_pixel-lcd-machine.h and nxfonts_pixel-unicode.h,
	  include/nuttx/nx/nxfonts.h, graphpics/Kconfig, and build-related files
	  in libnx/nxfonts: Two new fonts from Pierre-noel Bouteville (2014-11-26).
	* configs/lpc4357-evb, arch/arm/src/pc43xx/chip/, configs/Kconfig, and
	  and other related files:  A port of NuttX to the LPC4357-EVB from
	  Toby Duckworth.  This port is a leverage of the LPC3330-Xplorer port
	  and still have a some misinformation from that port that needs to be
	  updated for the LPC4357-EVB (2014-11-26).
	* arch/arm/include/stm32/chip.h, src/stm32/Kconfig, chip.h, and
	  chip/stm32f102_pinmap.h:  Enable support for the STM32 F102.  From
	  https://github.com/PX4/NuttX/pull/28.diff (2014-11-27).
	* drivers/loop.c:  Loop device should return -EINTR is interrupt by a
	  signal (2014-11-27).
	* drivers/input/djoystick.c and include/nuttx/input/djoystick.h.  Also
	  drivers/input/Kconfig and Make.defs, and include/nuttx/fs/ioctl.h: Add
	  an interface definition and upper half driver for a discrete joystick
	  device (2014-11-27).
	* arch/arm/src/efm32/Kconfig and efm32_serial.c: Add support for serial
	  termios TCGET and TCSET.  For the moment, only set/get speed is
	  implemented.  From Pierre-noel Bouteville (2014-11-27).
	* drivers/wireless/ and include/nuttx/wireless/cc3000.h:  A set of 11
	  patches correcting issues with the CC3000 networking.  All from Jussi
	  Kivilinna (2014-11-28).  Among these:
	  03/11: CC3000 driver was getting stuck at recv() when remote host
	    closed connection and application tried to read data from remotely
	    shutdown socket. This patch adds proper handling for remotely closed
	    socket event.
	  07/11: Socket state initialization was done in 'register', while it
	    should be initialized in 'open' and deinitialized in 'close'. Old
	    way caused problems when device is closed, power-cycled and then
	    reopened as old socket state was left enabled.
	  08/11: Select thread was getting stuck after 'close, power-cycle,
	    reopen', since selectsem was not properly setup and cleaned up.
	  09/11: 'maxFD' was not properly reset in select worker and not checked
	    for before calling cc3000_select().
	  10/11: After wlan_stop()/cc3000_close(), irqsem was left with count
	    '-1'. Therefore on next wlan_start()/cc3000_open(), initial value
	    for irqsem was wrong. Additional repeated wlan_start()/wlan_stop()
	    decreased irqsem value further. Obviously this causes driver not to
	    function correctly and freeze. Patch moves initialization and
	    destruction of waitsem, irqsem and readysem to
	    cc3000_open/cc3000_close.
	* include/cxx/cctype: Undefine macros defined ctype.h so that builtin
	  C++ implementations will be used intead.  From Lorenz Meier
	  (2014-11-28).
	* configs/stm3210e-eval/src/stm32_djoystick.c:  Add a discrete Joystick
	  supportfor the STM3210E-EVAL (2014-11-28).
	* drivers/input/djoystick.c include/nuttx/input/djoystick.h: Add a new
	  ioctl to get the supported joystick discrete signals (2014-11-28).
	* drivers/input/ajoystick.c and include/nuttx/input/ajoystick.h.  Also
	  drivers/input/Kconfig and Make.defs, and include/nuttx/fs/ioctl.h: Add
	  an interface definition and upper half driver for an analog joystick
	  device. Initial check-in is only a little more of a clone of the
	  discrete joystick driver and is as-of-yet untested (2014-11-27).
	* libc/Kconfig, misc/Make.defs, misc/lib_ioctl.c, fs/vfs/fs_ioctl.c,
	  include/nuttx/fs/fs.h, include/sys/ioctl.h, syscall.h, and several
	  files in syscall/: Add support for a variadic ioctl() function.  The
	  ioctl() interface is a non-standard, Unix interface.  NuttX has always
	  used the older, three-parameter version.  Most contemporary systems
	  now, however, use a variadic form of the ioctl() function.  Added an
	  option to insert a shim layer to adapt the three-parameter ioctl() to
	  use the variadic interface form.  Internally, the ioctl handling is
	  the same three-parameter logic.  The only real complexity to the shim
	  is in how the system calls must be handled (2014-11-29).
	* arch/arm/src/stm32/stm32_i2c.c: Port Tridge's I2C noise resilience
	  logic from the PX4 repository (2014-11-29).
	* arch/arm/src/stm32/chip/stm32l15xxx_pinmap.h:  Fix a typo in the
	  MCO pin definition.  From Jussi Kivilinna (2014-12-02).
	* arch/arm/src/stm32/stm32_rcc.h:  Add missing MCO configuration for
	  the STM32L1xxx.  From Jussi Kivilinna (2014-12-02).
	* configs/sama5d3-xplained/src/sam_ajoystick.c:  Add analog Joystick
	  shield support for the SAMA5D3 Xplained board (2014-12-3).
	* configs/ucleo-f4x1re/src/sam_ajoystick.c and sam_adc.c:  Add
	  analog Joystick shield support for the Nucleo F4x1RE boards.  There
	  are still some ADC issues to be worke through as of the initial
	  commit (2014-12-3).
	* /drivers/eeprom/spi_xx25xx.c and /include/nuttx/eeprom/spi_xx25xx.h:
	  Add support for ST Micro EEPROM device geometries.  From Sebastien
	  Lorquet (2014-12-5).
	* sched/mqueue: msg type should be char * not void * in mq_send,
	  mq_timedsend, mq_receive, and mq_timedreceive.  Noted by  Pierre-Noel
	  Bouteville (2014-12-05).
	* fs/mqueue/mq_open.c and sched/mqueue/mq_msgqalloc.c: In message queue
	  creation return ENOSPC error if size exceeds the configured size of
	  pre-allocated messages; Use ENOSPC vs ENOMEM per OpenGroup.org.  From
	  Pierre-Noel Bouteville (2014-12-6).
	* Add sys/custom_file.h.  Used when CUSTOM_FILE_IO is define and avoids
	  re-definition errors about the FILE define.  From Thomas Gruber via
	  the PX4 repository (2014-12-06).
	* tools/bfd-converter.c and mkdeps.c:  Eliminate a warnging about
	  redefined strtok_r on some platforms (2014-12-8).
	* arch/sim/Kconfig:  Allow building the simulated framebuffer driver
	  even if NX is not enabled (12014-12-8).
	* configs/sim/traveler and README.txt:  Add a configuration build and test
	  the Traveler first person game using the simulator (2014-12-8).
	* arch/arm/src/stm32/chip/stm32f20xxx_pinmap.h and stm32f40xxx_pinmap.h:
	  Set the GPIO_SPEED_50MHz on all F2 and F4 SPI pin configurations.
	  This is based on an F411 SPI1 errata but the fixed is generalized to
	  all SPI and all F2 and F4 (let me know if this introduces any other
	  issues).  Discovered and fixed by Sebastien Lorquet after much
	  consternation (2014-12-8).
	* libc/stdio/lib_avsprintf.c: avsprintf():  Fix a bug in usage of
	  va_list on x86.  On x86, va_list is a pointer to a single copy on the
	  stack.  avsprintf() calls lib_vsprintf() twice and so traverses the
	  va_list twice using va_start.  va_start modifies that single copy on
	  the stack so that the second call to lib_vsprintf() fails.  This appears
	  to be an issue with x86 only so far (2014-12-8).
	* stdint.h:  Don't use hex values to specify minimum values of fixed
	  width, signed values.  Hex values are inherently unsigned and not
	  usable for this purpose in all contexts (2014-12-8).
	* arch/arm/src/tiva/tiva_i2c.c, tiva_i2c.h, Kconfig, and Make.defs: Add
	  build framework and skeleton files for Tiva I2C driver.  Initial
	  commit is just the STM32 I2C driver with name changes and STM32-
	  specific logic removed (2014-12-9).
	* fs/procfs/fs_procfs.c:  Add procfs write support.  From Ken Pettit
	  (2014-12-9).
	* include/crc8.h, libc/misc/lib_crc8.c, and Make.defs: Add CRC8 support.
	  From Ken Pettit (2014-12-9).
	* drivers/mtd/smart.c, Kconfig, fs/smartfs/smartfs_smart.c,
	  smartfs_procfs.c, smartfs_utils.c, smartfs.h, Kconfig,
	  include/nuttx/fs/ioctl.h, smart.h, and mtd/smart.h: Implements wear-
	  leveling in the SmartFS.  From Ken Pettit (2014-12-9).
	* arch/arm/src/tiva/tiva_i2c.c: Driver is code complete but still
	  untested (2014-12-10).
	* configs/tm4c123g-launchpad/src/tm4c_at24.c, tm4c_bringup.c, and other
	  files:  Add initialization logic for an external AT24 EEPROM.  This
	  is intended only to support testing of the Tiva I2C driver
	  (2014-12-10).
	* libnx/Makefile, libnx/nxfonts/nxfonts_x11-misc-fixed-*.h, Make.defs,
	  Makefile.sources, nxfonts_bitmaps.c, graphics/Kconfig, and
	  include/nuttx/nx/nxfonts.h:  Lots of fonts that derive from
	  X11-misc-fixed-* fonts.  Converted for use by NuttX by Pierre-Noel
	  Bouteville (2014-12-10).
	* nuttx/drivers/mtd/m25px.c; M25P serial flash driver:  Add subsector
	  size of the M24P16 part.  From Lazlo (2014-12-10).
	* libc/string/lib_strncpy.c:  Commit d0c76ccacf0dc8988f9617ad82bf4349f456bb08
	  will trash a lot of memory if n == 0.  From Yasuhiro Osaki (2014-12-11).
	* arch/arm/src/stm32/stm32_otghsdev.c.  Fix for OTGHS device driver
	  working in FS mode.  From Ken Pettit (2014-12-12).
	* libc/stdio/lib_sscanf.c: Accept %X as well as %x as a format
	  specifier.  From Sébastien Lorquet (2014-12-12).
	* libc/stdio/lib_sscanf.c: Also accept %F as well as %f (2014-12-12).
	* arch/arm/src/stm32/stm32_otghsdev.c: For STM32 OTG HS DEV (in FS
	  mode): Disable ULPI clock enable in RCC AHB1 Register.  If Both ULPI
	  and the FS clock enable bits are set in FS mode, then the ARM never
	  awakens from WFI due to a chip issue.  This is only an issue if you
	  are using the internal PHY.  From Ken Pettit (2014-12-13).
	* drivers/serial/serial.c: In case a thread is doing a blocking
	  operation (e.g. read()) on a serial device, while it is being
	  terminated by pthread_cancel(), then uart_close() gets called, but
	  the semaphore (dev->recv.sem in the above example) is still blocked.
	  This means that once the serial device is opened next time, data will
	  arrive on the serial port (and driver interrupts handled as normal),
	  but the received characters never arrive in the reader thread.
	  The problem was fixed by re-initializing the semaphores on the last
	  uart_close() on the device. From Harald Welte (2014-12-13).
	* sched/semaphore/sem_recover.c, Make.defs, seamphore.c,
	  sched/wdog/wd_recover.c, Make.defs, wdog.h, sched/task/task_recover.c:
	  Add logic to clean up after task_delete() or pthread_cancel() if the
	  task happens to be waiting on a semaphore when it is cancelled
	  (2014-12-13).
	* arch/arm/src/kl/kl_gpioirq.c, Kconfig, Make.defs, and kl_irq.c: Add
	  GPIO interrupt capability for the KL architecture. The patch is
	  almost the same as kinetis_pinirq.c, just minor modifications and
	  rename kl_pinirq to kl_gpioirq to make it more generic to developers.
	  From Alan Carvalho de Assis (2014-12-13).
	* arch/sim/src/up_ajoystick.c, Kconfig, Makefile, up_idle.c,
	  up_internal.h, up_x11eventloop.c, up_x11framebuffer.c,
	  configs/sim/src/Makefile, sim_boot.c, and traveler/defconfig: Add an
	  X11 mouse-based simulation of an analog joystick device (2014-12-14).
	* drivers/sensors/adxl345*, include/nuttx/sensors/adxl345.h and other
	  files:  Add driver support for the ADXL345 accelerometer.  From  Alan
	  Carvalho de Assis (2014-12-16).
	* configs/freedom-kl25z: Add board support for the ADXL345 accelerometer.
	  From  Alan Carvalho de Assis (2014-12-16).
	* Kconfig, include/debug.h, drivers/sensors/*, and Qencoder logic in
	  arch/arm/src/stm32 and various QEncoder board support files under
	  config/: Unify sensor debug.  ADX driver was using input debug; LM75
	  and QENCODE that their own custom debug.  Now all use
	  CONFIG_DEBUG_SENSOR, sndbg() (2014-12-16).
	* configs/dk-tm4c129x:  Initial board support for the Tiva DK-TM4C129x
	  Connected Development Kit.  The initial commit is just the Tiva
	  TM4C123G-Launchpad board support with naming changes (2014-12-16).
	* include/nuttx/sched.h, sched/Kconfig, sched/init/os_start.c,
	  sched/pthread/pthread_create.c, sched/task/task_prctl.c,
	  sched/task/task_setup.c: strncpy() will not copy the terminating \0
	  into the destination if the source is larger than the size of the
	  destination. Ensure that the last byte is always zero and let strncpy
	  only copy CONFIG_TASK_NAME_SIZE bytes. The issue of unterminated names
	  can be observed in ps when creating a pthread while
	  CONFIG_TASK_NAME_SIZE is set to 8.  From  Daniel Willmann (2014-12-17).
	* configs/*/*/defconfig: The previous change increased the task name
	  size allocation by one to hold a NUL terminator.  This changes reduces
	  the configured name size by one so that no additional memory is used
	  (2014-12-17).
	* drivers/wireless/cc3000/cc3000.c: CC3000 Fix: Data can be unaligned.
	  When dereferenced as an input ntosh(), a bad value is returned.
	  Reported by Alan Carvalho de Assis (2014-12-18).
	* configs/freedom-kl25z: Update the Freedom KL25Z board CC3000 support
	  to use the current CC300 interfaces.  From Alan Carvalho de Assis
	  (2014-12-18).
	* arch/arm/src/tiva, include/tiva, and many configurations:  Change
	  negative Tiva logic CONFIG_TIVA_DISABLE_GPIOx_IRQS to positive logic
	  CONFIG_TIVA_GPIOx_IRQ (2014-12-18).
	* arch/arm/src/tiva/Kconfig:  Fix configuration logic for IRQ interrupts.
	  The various parts support varying numbers of GPIO blocks and with varying
	  capabilities to support interrupts on the pins of different GPIO blocks
	  (2014-12-18).
	* arch/arm/src/stm32/chip/stm32f40xxx_rcc.h: PLLSAI register name to
	  this one in the reference manual. From Marco Krahl (2014-12-19).
	* arch/arm/src/stm32/chip/stm32_ltdc.h: Rename CFBLR register name to
	  the name used in the reference manual. From Marco Krahl (2014-12-19).
	* arch/arm/src/stm32/chip/stm32_ltdc.h: Add missing clut register
	  definition. From Marco Krahl (2014-12-19).
	* arch/arm/src/stm32/stm32f40xxx_rcc.c:  Configure PLLSAI clock to
	  enable ltdc register access. From Marco Krahl (2014-12-19).
	* configs/stm32f429i-disco/include/board.h:  Update board definition for
	  the ili9341 LCD display. This configures all LCD settings for the RGB
	  interface. Also adds a customer LCD display template. From Marco Krahl
	  (2014-12-19).
	* arch/arm/src/stm32/stm32_ltdc.h: Define a common layer description for
	  the ltdc and dma2d controller. From Marco Krahl (2014-12-19).
	* arch/arm/src/stm32/stm32_dma2d.c/.h and related files:  Add
	  infrastructure for dma2d support. From Marco Krahl (2014-12-19).
	* arch/arm/include/stm32/ltdc.h:  Add interface to perform hardware
	  accelerated layer operation. The following methods must be supported
	  by the implementation: gevideoinfo, getplaneinfo, getlid, setclut,
	  getclut, setcolor, getcolor, setcolorkey, getcolorkey, setalpha,
	  getalpha, setblendmode, getblendmode, setarea, getarea, and update.
	  And if DMA2D is supported: blit and blend.  The method up_ltdcgetlayer
	  provides access to a reference of a specific ltdc layer. From Marco
	  Krahl (2014-12-19).
	* arch/arm/src/stm32/stm32_ltdc.c: Implements ltdc frambuffer support
	  for the generic nuttx framebuffer interface, (see nuttx/video/fb.h).
	  This also implements the interface to perform hardware accelerated
	  layer operation by the ltdc controller and dma2d controller later
	  (see nuttx/video/ltdc.h). The following methods are supported by the
	  ltdc interface: getvideoinfo, getplaneinfo, getlid, setclut, getclut,
	  setcolor, getcolor, setcolorkey, getcolorkey, setalpha, getalpha,
	  setblendmode, getblendmode, setarea, getarea, and update. From Marco
	  Krahl (2014-12-19).
	* include/nuttx/lcd/ili9341.h: Update interface control definitions.
	  From Marco Krahl (2014-12-19).
	* configs/stm32f429i-disco/src/stm32_lcd.c:  Add support for
	  initializing ltdc framebuffer and the configured lcd display.  This
	  adds support for initializing of the ltdc controller and the lcd
	  device connected on the stm32f429i-disco. The following methods are
	  provided for the generic fb interface: up_fbinitialize,
	  up_fbgetvplane, and up_fbuninitialize. The following methods are
	  provided for the ltdc interface: up_ltdcgetlayer. From Marco Krahl
	  (2014-12-19).
	* zrch/arm/src/stm32/Kconfig: Add configuration option for ltdc.  This
	  adds the following ltdc configuration options: dither support, cmap
	  support, is this the right place for CONFIG_FB_CMAP?, support for
	  extended ltdc interface. From Marco Krahl (2014-12-19).
	*  nuttx/configs/stm32f429i-disco: Enable configuration of framebuffer
	  support for the ltdc controller. From Marco Krahl (2014-12-19).
	* configs/stm32f429i-disco/src/stm32_boot.c: Initialize ltdc during
	  bootup. From Marco Krahl (2014-12-19).
	* configs/stm32f429i-disco/ltdc: Add default platform configuration to
	  test framebuffer support for the ltdc. From Marco Krahl
	  (2014-12-19).
	* libnx/nxfonts/nxfonts_getfont.c: A patch to add previous added font
	  into nxf_getfonthandle function.  From  Pierre-Noel Bouteville
	  (2014-12-19).
	* arch/arm/src/tiva, include/tiva, and many configurations:  Change
	  negative Tiva logic CONFIG_SSIx_DISABLE to positive logic
	  CONFIG_TIVA_SSIx.  Add support for SSI2 and SSI3 (2014-12-21).
	* arch/arm/src/efm32/efm32_pwm.c/.h, efm32_timer.c/.h, and related
	  build files: Add support for timer/PWM on the EFM32GG.  From
	  Pierre-noel Bouteville (2014-12-26).
	* drivers/serial/Kconfig, serial.c, serialirq.c, and
	  include/nuttx/serial/serial.h:  Add watermark levels to the serial
	  RX flow control logic.  Modify the rxflowcontrol method to accept
	  the number of bytes in the buffer and a boolean indication of which
	  watermark was crossed (2014-12-27).
	* sched/semaphore/sem_waitirq.c must be built when signals are disabled.
	  That is because not handles not only the case of semaphore wait
	  being awakened by a signal, but also the case with sem_timedwait.c
	  when the semaphore wait is awakened by a timeout (2014-12-28).
	* arch/arm/src/stm32/stm32_ltdc.c: stm32:  Fix faulty access to non-
	  existing layer.  This disables operation that requires double layer
	  support, when configured for single layer only.  From Marco Krahl
	  (2014-12-29).
	* arch/arm/src/stm32/stm32_ltdc.c: stm32:  Fix wait upon vertical blank.
	  This should never have occurred before.  From Marco Krahl (2014-12-29).
	* configs/stm32f429i-disco/ltdc/defconfig and src/stm32_boot.c:
	  stm32f429i-disco: change ltdc initializing during boot up. This moves
	  initializing of the ili9341 lcd and ltdc driver to the board specific
	  initializing routine.  From Marco Krahl (2014-12-29).
	* arch/arm/src/stm32/stm32_ltdc.c:  Clean up documentation, some
	  formatting improvements.  From Marco Krahl (2014-12-29).
	* arch/arm/src/tiva/chip/tiva_ethernet.h, lm3s_ethernet.c, and
	  tm4c_ethernet.h:  Add logic to discriminate between LM3S class Ethernet
	  register definitions and TM4C129X class Ethernet register definitions.
	  Add TM4C129X Ethernet register definitions (2014-12-30).
	* arch/arm/src/tiva/tm4c_ethernet.c, lm3s_ethernet.c, Kconfig, and
	  Make.defs: First cut at TM4C129X Ethernet driver.  Initial commit is
	  basically just the STM32 Ethernet driver with modifications for a clean
	  compilation in the Tiva environment (2014-12-31).
	* arch/arm/src/stm32/stm32_rtc.c, stm32_rcc.c, Kconfig: Add support for
	  the internal low speed clock (LSI) as a source of the RTC clock.  Some
	  boards do not have the external 32khz oscillator installed, for those
	  boards we must fallback to the crummy internal RC clock.  Turn on by
	  defining CONFIG_RTC_LSICLOCK.  From Kevin Hester (2015-01-02).
	* net/tcp/tcp_conn.c:  Fix a logic error when CONFIG_NETDEV_MULTINIC is
	  selected: net_unlock(flags) will be called will an uninitialized
	  variable (2015-01-03).
	* arch/arm/src/tiva/tiva_irq.c:  Fix Tiva IRQ control logic; was limited
	  to only 64 IRQs.  That is a problem for higher numbered IRQs on many
	  platforms (2015-01-06).
	* arch/arm/src/stm32/stm32_sdio.c, drivers/mmcsd/mmcsd_sdio.c and Kconfig,
	  and include/nuttx/sdio.h: MMCSD SDIO:  Add support for a new
	  SDWAIT_WRCOMPLETE condition.  The previous logic used a busy-wait loop
	  to poll the card R1 status to determine when the card was ready for
	  the next transfer.  That busy-wait can be quite long -- up to hundreds
	  of milliseconds.  An alternative is to look the SD D0 pin which
	  will change state when the card is no longer busy.  This change avoids
	  the busy-wait poll by reconfiguring the SD D0 pin as a GPIO interrupt,
	  then waiting for the card to become ready without taking up CPU
	  cycles.  This change is conditioned on CONFIG_MMCSD_SDIOWATI_WRCOMPLETE
	  and is currently only implemented for the STM32 SDIO driver. From
	  David Sidrane (2015-01-08).
	* arch/arm/src/tiva/tiva_timerlib.c and .h:  Add a timer library for
	  generic support of Tiva timers (2015-01-08).
	* arch/arm/src/tiva/tiva_timerlow32.c:  Add a driver lower half for
	  drivers/timer.c.  Only 32-bit periodic timers are supported.  This
	  provides userspace access to timers.
	* configs/px4-v2_upstream, Kconfig, README.txt: Remove the px4-v2_upstream
	  configuration.  Moved to misc/Obsoleted/configs.  This was not the
	  official configuration for the PX4 board and has led to confusion by
	  NuttX users.  The board configuration also requires some ongoing
	  maintenance and customization to support ongoing PX4 testing and
	  evaluation.  It is best retained the PX4 repositories where it can be
	  properly maintained and not in the upstream NuttX repository
	  (2015-01-14).
	* net/netdev/netdev_ioctl.c and include/nuttx/net/ioctl.h:  Add support
	  for IPv6 ioctls to manipulate IP addresses (2015-01-14).
	* net/icmpv6:  Create a future home for ICMPv6 (2015-01-14).
	* net/icmp:  Remove all logic conditioned on CONFIG_NET_IPv6
	  (2015-01-14).
	* net/, include/nuttx/net, and a few other files: (1) Copied all ICMP
	  sources files to net/icmpv6 with proper renaming and removal of IPv4
	  logic, (2) remove IPv6 logic from files in net/icmp, (3) copied
	  include/nuttx/icmp.h to icmpv6.h and removed IPv4 specific logic, (4)
	  removed all IPv6 logic from icmp.h, (5) IP_HDRLEN became IPv4_HDRLEN
	  and IPv6_HDRLEN, (6) ip_chksum() became ipv4_chksum() and
	  ipv6_chksum(), and (7) added partial support for ICMPv6 statistics
	  (2015-01-14).
	* arch/, drivers/net/, include/nuttx/net, and net/devif:  (1) Rename
	  devif_input() ipv4_input(), (2) copy net/devif/devif_input.c to
	  ipv6_input.c, remove all IPv4-specific logic, (3) rename
	  net/devif/devif_input.c to ipv4_input.c, remove all IPv6-specific
	  logic, and (4) xplit IPv4 header structure out as net_ipv4hdr_s from
	  net_iphdr_s (2015-01-15).
	* arch/ and drivers/net:  All Ethernet drivers:  Call ipv6_input() if
	  IPv6 is enabled and an IPv6 packet is received (2015-01-15).
	* net/devif, net/tcp, net/ucp, include/nuttx/net:  Separate tcp_input()
	  and udp_input() into separate functions tcp_ipv4_input(),
	  tcp_ipv6_input(), udp_ipv4_input(), and upd_ipv6_input() than can deal
	  will the data offsets caused by the differing sizes of the IP header
	  (2015-01-15).
	* net/utils/net_ipv6_maskcmp.c:  Add missing implementation of
	  net_ipv6_maskcmp() (2015-01-15).
	* Networking: Drivers can have both IPv4 and IPv6 addresses, but a
	  socket can only only one or the other; The socket connection
	  structures need to include a union of IPv4 and IPv6 addresses for
	  the local address binding and for the remote address connections
	  (2015-01-16).
	* Networking:  Replace all references to net_ipaddr_t with either
	  in_addr_t on net_ipv6addr_t.  The goal is to support both IPv4 and
	  IPv6 simultaneously.  This requires that the two types be distinct
	  and not conditionally typedef'ed to net_ipaddr_t (2015-01-16).
	* Networking:  Replace all references to the macros net_ipaddr_copy,
	  net_ipaddr_hdrcopy, net_ipaddr_cmp, net_ipaddr_hdrcmp, and
	  net_ipaddr_maskcmp with the appropriate IPv4 or IPv6 version of the
	  macro (such as net_ipv4addr_copy).  The goal is to support both
	  IPv4 and IPv6 simultaneously.  This requires that the macros be
	  distinct and not conditionally defined to one on or the other
	  (2015-01-16).
	* Networking: UDP and TCP MSS depends on the IP header size (as well
	  as the link layer header size) and cannot be represented with a
	  single value (2015-01-16).
	* net/neighbor:  Move net/ipv6 to net/neighbor (2015-01-16).
	* include/net/if.h:  Add a bit to the device flags to indicate if the
	  device packet buffer holds an IPv4 or an IPv6 domain packet.
	  Set/clear the flag along with the correct offset to the application
	  payload data as each packet is received (2015-01-17).
	* net/socket, net/tcp, net/udp:  Add logic to select the domain of the
	  outgoing packet before sending any UDP or TCP packet.  This sets the
	  bit to indicate the IPv4 or IPv6 domain and the correct offset to the
	  output going payload data (2015-01-17).
	* net/socket and net/tcp: When we are ready to receive data or when we
	  have outgoing data ready to be sent, we need to the notify the
	  appropriate device driver of this condition.  The notifying socket
	  will be configured as either PF_INET or PF_INET6 and must look up the
	  correct driver using the correct IP domain (2015-01-17).
	* net/socket/accept.c:  Fix accept() so that it returns the correct IP
	  address for the selected socket IP domain (2015-01-17).
	* Networking: Final detangling off IPv4 and IPv6 TCP/UDP send logic.
	  The networking subsystem now compiles with IPv6 enabled (2015-01-18).
	* arch/arm/src/tiva/tm4c_ethernet.c:  When calling into the stack
	  from the worker thread, it is necessary to have the stack locked
	  (2015-01-18).
	* nuttx/arch/arm/src/stm32/stm32_serial.c:  Fix declaration and
	definition of up_receive() and up_dma_receive() to match fields of
	  uart_ops_s from nuttx/include/nuttx/serial/serial.h.  From Freddie
	  Chopin (2015-01-19).
	* drivers/pipes/pipe.c, drivers/usbdev/cdcacm.c, and
	  mm/mm_gran/mm_granalloc.c: Fixes some issues found by the PX4 team
	  using Coverity.  From Pavel Krienko (2015-01-19).
	* net/icmpv6/icmpv6_solicit.c, net/neighbor/neighbor_out.c, and other
	  files: Add logic to search the Neighbor Table and update the
	  destination address in the output Ethernet header OR to send an
	  ICMPv6 Neighbor Solicitation if there is no entry in the Neighbor
	  table for the IPv6 address (2015-01-20).
	* arch/ and drivers/net:  Add missing raw/packet socket support to
	  all Ethernet driverss (2015-01-20).
	* arch/ and drivers/net: Networking:  Modify all Ethernet drivers:
	  Do neighbor look-up on all outgoing IPv6 packs in order to properly
	  set the destination link layer address (2015-01-20).
	* Networking:  When sending ICMPv6 advertisements and solicitations,
	  set the NOARP bit so that we don't overwrite the destination MAC
	  address (2015-01-20).
	* Many files: Correct name of fields in struct sockaddr_in6:  sin6_port
	  and sin6_family, not sin_port and sin_family (2015-01-20).
	* net/socket/accept.c: Correct the value returned by accept() in the
	  case where net_lockingwait() is called.  It was returning -1 and
	  losing the errno value.  Noted by Rony Xln (2015-01-22).
	* net/: After some significant effort, ICMPv6 and TCP are both
	  functional when IPv6 is selected.  UDP still requires testing
	  (2015-01-22).
	* configs/dk-tm4c129x/ipv6:  Add an IPv6-enabled NSH configuration
	  (2015-01-23)
	* include/nuttx/net/icmpv6.h and net/icmpv6/icmpv6_ping.c: First cut
	  at ICMPv6 ping logic.  It works in both directions! (2015-01-23).
	* arch/arm/src/efm32/efm32_rmu.c and .h: Add support for the EFM32
	  reset management unit (RMU).  From Pierre-noel Bouteville
	  (2015-01-23).
	* include/nuttx/math.h: Adds support for the expm1 functions:
	  http://pubs.opengroup.org/onlinepubs/009695399/functions/expm1.html.
	  From Brennan Ashton (2015-01-23).
	* Many file: Add CONFIG_STACK_COLORATION that does the same thing as
	  CONFIG_DEBUG_STACK but without enabling debug.  From David Sidrane
	  (2015-01-24).
	* Remove CONFIG_DEBUG_STACK.  Adding CONFIG_STACK_COLORATION makes
	  this configuration option pointless (2015-01-24).
	* net/: Clean up network status collection for IPv6 (2015-01-24).
	* arch/ and configs/: Changes to get USART 2 & 3 working on
	  lpc4357-evb. These changes are required to get USART 2 and 3 working
	  on the Embest development board.  From Toby Duckworth.

7.8 2015-02-11 Gregory Nutt <gnutt@nuttx.org>

	* include/nuttx/math.h and libc/math: Add support for inverse
	  hyperbolic functions.  From Brennan Ashton (2015-01-26).
	* include/nuttx/math.h: Add math library definition for isfinite().
	  From Brennan Ashton (2015-01-26).
	* include/nuttx/math.h and libc/math/lib_erf*.c: Add error function
	  to math library.  From Brennan Ashton (2015-01-26).
	* include/nuttx/math.h and libc/math: Add math library defines for
	  nan(), copysign(), and trunc() functions.  From Brennan Ashton
	  (2015-01-26).
	* sched/wqueue/kwork_process and libc/wqueue/lib_usrthread.c:  Fix
	  a backward calculation when determining the time to the next event.
	  This is a bug in the back-up, "fail safe", work queue timing so it
	  not as bad as it seems.  From Liio Chen via the PX4 repository
	 (2015-01-27).
	* arch/arm/src/stm32/stm32_exti_gpio.c:  Disabling any of EXTI 5-9
	  interrupts was disabling interrupts for all EXTI 5-9. Same issue with
	  EXTI 10-15.  From Jussi Kivilinna (2015-01-27).
	* arch/arm/src/stm32/stm32_rtcc.c and Kconfig:  Recent changes to
	  stm32_rtcc.c do not compile with STM32L15XX configurations.  From
	  Jussi Kivilinna (2015-01-27).
	* net/local:  Add initial support for local, Unix domain sockets.
	  Initial support is limited to SOCK_STREAM and is untested on
	  initial commit (2014-01-27).
	* net/iob, net/tcp/tcp_callback.c, and include/nuttx/net/iob.h:  There
	  were issues with the TCP write-ahead buffering if CONFIG_NET_NOINTS was
	  enabled:  There is a possibility of deadlocks in certain timing conditions.
	  I have not seen this with the Tiva driver that I have been users but
	  other people claim to see the issue on other platforms.  Certainly it
	  is a logic error:  The network should never wait for TCP read-ahead
	  buffering space to be available.  It should drop the packets
	  immediately. This was fixed by duplicating most of the IOB interfaces:
	  The versions that waited are still present (like iob_alloc()), but now
	  there are non-waiting versions of the same interfaces (like
	  iob_tryalloc()).  The TCP read-ahead logic now uses only these non-
	  waiting interfaces (2015-01-27).
	* net/tcp/tcp_send_buffered.c and tcp_wrbuffer.c: Fix another deadlock
	  condition.  tcp_write_buffer_alloc() calls sem_wait() with network
	  locked.  That worked if CONFIG_NET_NOINTS was not defined because
	  interrupts are automatically restored when the wait happens.  But
	  with CONFIG_NET_NOINTS=y, the wait blocks with the network locked --
	  bad style and also can lead to a deadlock condition (2015-01-28).
	* arch/arm/src/armv7-a/arm_memcpy.S and arch/arm/src/armv7-m/up_memcpy.S:
	  ARM assembly language memcpy.S's were not returning a value in R0 they
	  are required to do.  From David Sidrane (2015-01-29).
	* net/local:  Extend Unix domain socket support to include support
	  for datagram Unix domain sockets (2015-01-29).
	* net/socket/accept.c:  Fix a major TCP bug introduced with commit
	  e71c09ce9777ff732cb60bd07fb43d85522f79d6.  Some connection logic was
	  reordered; setting the socket as 'connected' got moved to BEFORE the point
	  where the check was made if the socket was already connected.  The
	  resulting behavior was odd:  Telnet would connect, but then when you
	  exit and reconnect, it would fail to connect.  But then if try again, it
	  would connect okay. So the symptom was connect-fail-connect-fail-...
	  (2015-01-29).
	* net/socket/net_poll.c, recvfrom.c, and udp/udp_callback.c: Add UDP
	  read-ahead support.  This enables support for for poll/select on UDP
	  sockets and also non-blocking UDP sockets.  From Macs N (2015-01-30).
	* net/local/local_netpoll.c, socket/net_poll.c, and udp/udp_netpoll.c:
	  Separate out UDP poll logic from net_poll.c into a new udp_netpoll.c;
	  Create a skeleton local_netpoll (2015-01-30).
	* net/socket/net_poll.c and tcp/tcp_netpoll.c: Separate TCP poll logic
	  out of net_poll.c and move it into the new tcp_netpoll.c (2015-01-30).
	* arch/arm/src/efm32/efm32_clockconfig.c: Logic to unconditionally enable
	  LE clocking. Even you don't use core clock LE as source for LFA or LFB,
	  to read are write any register not clocked by HFPERCLK or HFCORECLK,
	  HFCORECLKLE should be enabled.  From Pierre-noel Bouteville (2015-01-30).
	* drivers/net/slip.c: SLIP interface improvements.  From Macs N
	  (2015-01-30).
	* clock_systimespec():  Fixes for compilation errors in certain
	  configurations.  From Macs N.
	* drivers/pipes/fifo.c, include/nuttx/fs/ioctl.h, and net/local/local_fifo.c:
	  Fix a race condition between FIFO buffer operations and the opening and
	  closing of FIFOs which necessary when the FIFOs are used to support
	  Unix domain, datagram sockets.  The default policy is the deallocate
	  FIFO buffering when the last client closes the pipe.  When when used
	  for datagram communications, packets left in the FIFO will be lost.
	  Some like UDP read-ahead is needed:  The buffered data in the FIFO
	  needs to be retained until the reader gets a chance to re-open the
	  FIFO.  Added an ioctl (PIPEIOC_POLICY) to control the buffer policy.
	  Default (0) is the legacy behavior; Unix domain datagram logic sets
	  the alternative policy so that the packet data persists after the FIFO
	  is closed (2015-01-30).
	* net/local:  Add configuration options so that Unix domain stream and
	  datagram support can be separately enabled (2015-01-31).
	* fs/vfs/fs_unlink.c and include/nuttx/fs/fs.h: Add an unlink method to
	  both the character and block driver interface.  This is important
	  because if the driver inode is unlinked and there are no open references
	  to the driver, then the driver resources will be stranded.  On the unlink
	  call, the driver has the opportunity (1) check if there an any open
	  references, and if not, (2) free the driver resources (2015-01-31).
	* drivers/pipes:  Implement the unlink method.  If the pipe/FIFO is
	  unlinked, it will marked the pipe/FIFO as unlinked.  If/when all open
	  references to the driver are closed, all of the driver resources will
	  be freed (2015-01-31).
	* arch/avr: Added architecture support for the Atmel AVR ATMega1284P
	  MCU.  From Jedi Tek'Unum (2015-01-31).
	* configs/moteino-mega: Added support for the LowPowerLab MoteinoMEGA
	  that is based on the Atmel AVR ATMega1284P MCU.  From Jedi Tek'Unum
	  (2015-01-31).
	* EFM32 RTC:  RTC driver using BURTC. From Pierre-Noel Bouteville
	  (2015-02-01).
	* drivers/ramdisk.c, include/nuttx/fs/ramdisk.h, and other files:  Add
	  logic to dispose of the driver and RAM buffer when the RAM disk has
	  been unlinked and all open references to the RAM disk have been
	  closed.  Add new parameters to romdisk() to specify what should be
	  done with the RAM/ROM buffer -- Should it be freed or not?  Changed
	  all calls to ramdisk() to use these new parameters (2015-02-01).
	* net/icmpv6/icmpv6_neighbor.c, icmpv6_notify.c (and other files): Adds
	  basic logic to support verification that we have the IPv6 address in
	  the Neighbor Table.  This feature is important because otherwise the
	  first packet sent to a remote peer will fail (it will be replaced
	  with a Neighbor Solicitation) (2015-01-02).
	* net/arp/arp.h, arp_notify.c, and arp_send.c: Fixes another
	  CONFIG_NET_NOINTS issues.  When called sem_timedwait() with the
	  network locked, the network stays locked while we wait which is not
	  what we want (without CONFIG_NET_NOINTS, interrupts are re-enabled
	  while we wait and all is well) (2015-02-02).
	* net/icmpv6/icmpv6.h, icmpv6_neighbor.c, icmpv6_notify.c: Apply the
	  same fix as for ARP to the Neighbor Solicitation logic (2015-02-02).
	* sched/sched/sched_timerexpiration.c, Kconfig, and include/nuttx/arch.h:
	  On my platform I have just 16-bit timer clocked at 32kHz. As result
	  oneshot timer max delay is 2s. The patch adds limit of maximum ticks
	  in sched_timer_start(). From Macs N (2015-02-03).
	* arch/arm/src/sam34:  Add support for Tickless mode of operation for
	  the SAM4CM platform.  From Macs N (2015-02-03).
	* include/nuttx/net/icmpv6.h and net/icmpv6/Kconfig: Add support for
	  sending ICMPv6 Router Solicitation and receiving Router advertisement.
	  This is a part of the ICMPv6 auto-configuration logic is still not
	  complete (2015-02-03).
	* libnx/nxfonts/nxfonts_getfont.c and nxfonts_sans39x48.h: Fixes a
	  problem with one of the font files.  From Pierre-noel Bouteville
	 (2015-02-03).
	* arch/arm/src/efm32/efm32_rtc_burtc.c:  Remove a misbehaving assertion.
	  From Pierre-noel Bouteville (2015-02-03).
	* net/icmpv6:  Implemented the ICMPv6 Autonomous Auto-Configuration
	  logic.  This is an IPv6 alternative to DHCP.  It obtains the IPv6
	  addresses and masks using ICMPv6 Router Solicitation and
	  Advertisement messages (2015-02-03).
	* arch/arm/src/stm32/stm32_aes.c, stm32_aes.h, and
	  chip/stm32l15xxx_aes.h:  Add driver for STM32L162XX AES peripheral.
	  From Juha Niskanen (2015-02-04).
	* net/icmpv6/icmpv6_radvertise.c, Kconfig, and other files: Add option
	  to send Router Advertisement Messages (2015-02-05).
	* net/icmpv6/icmpv6_input.c, arch/arm/src/tiva/tm4c_ethernet.c, and
	  stm32/stm32_eth.c: Add logic to behave like a router (if so
	  configured):  NuttX will not send the router advertisement message
	  in response to any router solicitation messages (2015-02-05).
	* configs/stm32f4discovery/ipv6 and arch/arm/src/stm32/stm32_eth.c: Add
	  an IPv6 configuration for the STM32F4-Discovery board (with the
	  STM32-DISCO_BB base board).  Verify that the STM32 Ethernet driver
	  works with IPv6 (2015-02-05).
	* net/icmpv6/icmpv6_input.c and icmpv6_rnotify.c:  With these two
	  changes both ICMPv6 autonomous autoconfiguration and router
	  functionality appear to be working with no problems (2015-02-05).
	* arch/arm/src/tiva and configs/tm4c123g-launchpad:  Adds support for
	  TM4C123G timers; integrates with the TM4C123G Launchpad.  From Calvin
	  Maguranis (2015-02-05).
	* arc/arc/src/tiva/tiva_adc.c and .h: Adds a Tiva ADC driver.  From
	  Calvin Maguranis (2015-02-05).
	* tmv4c123g-launchpad:  Add Tiva ADC support to the TM4C123G-Launchpad.
	  From Calvin Maguranis (2015-02-05).
	* arch/arm/src/stm32/stm32_spi.c: The source clock for SPI 4,5, and 6
	  should be PCLK2, not PCLK1 (for F411, F427, and F429).  Per David
	  Sidrane (2015-02-07).
	* drivers/syslog/syslog_console.c, include/nuttx/syslog/syslog_console.h,
	  and the console device initialization logic for all architectures: Add
	  an option to use the syslog'ing device as the system console.  This
	  option enables a low-level, write-only console device at /dev/console
	  (similar to the low-level UART console device).  From Pierre-noel
	  Bouteville (2015-02-08).
	* net/utils:  Clean up and consolidate some clunky stuff in ARP and
	  ICMPv6 time waiting logic by adding new net_timedwait() function
	  (2015-4-09).
	* arch/arm/src/stm32/stm32_eth.c: Add logic so that STM32 Ethernet
	  driver can avoid interrupt level processing and, instead, execute on
	  the work thread (2015-4-09).
	* configs/stm32f4discovery/netnsh and ipv6: Convert all STM32F4-
	  Discovery configurations (with base board) to configure the Ethernet
	  driver to use the work queue (vs. interrupt level processing)
	  (2015-4-09).
	* libc/unisted/lib_execl.c:   Fix bad logic in counting the number of
	  arguments.  This could never have worked.  Noted by Pierre-noel
	  Bouteville (2015-4-09).
	* arch/arm/src/sama5/sam_emacb.c: Add support for Multicast address
	  matching and IPv6 in the SAMA5D4 Ethernet driver (2015-02-09).
	* configs/sama5d4-ek/ipv6: Add a configuration for testing IPv6 with
	  the SAMA5D4-EK (2015-02-09).
	* arch/arm/src/armv7-a/arm_doirq.c: ARMv7-A interrupt handler should not
	  automatically re-enable interrupts on interrupt return.  That
	  interferes with the driver's ability to manage interrupts (2015-02-09).
	* arch/arm/src/sama5/sam_emacb.c: Add support for CONFIG_NET_NOINTS in
	  the SAMA5D4 Ethernet driver so that the driver can operate from the
	  work queue thread instead of doing everything from the interrupt level
	  (2015-02-09).
	* SAMA5D4-EK: CONFIG_NET_NOINTS is now enabled in the nsh and ipv6
	  configurations (2015-02-09).
	* arch/arm/src/a1x, arm, c5471, common, dm320, imx, lpc2378, lpc31xx,
	  sama5, str71x, hc/src.common, sh/src/common, x86/src/common,
	  z16/src/common, z16f, z80/src/z8: Big, very risky change:  Remove all
	  occurrences of up_maskack_irq() that disable and enable interrupts
	  with up_ack_irq() that only acknowledges the interrupts.  This is only
	  used in interrupt decoding logic.  Also remove the logic that
	  unconditionally re-enables interrupts with the interrupt exits.  This
	  interferes with the drivers ability to control the interrupt state.
	  This is a necessary, sweeping, global change and unfortunately
	  to test (2015-02-09).
	* mtd/ramtron.c:  Table of parts is not terminated properly if
	  CONFIG_RAMTRON_FRAM_NON_JEDEC is not defined.  Noted by David
	  Sidrane (2015-02-09).
	* arch/arm/src/sam34/sam_emac.c, sama5/sam_emaca.c, and sama5/sam_gmac.c:
	  Clone the SAMA5D4 IPv6 support to the SAM4E EMAC and SAMAd3 EMAC and
	  GMAC drivers  (2015-02-09).
	* net/:  Lots of build problems introduced into multiple NIC support.
	  Many places where conditional logic based on CONFIG_NETDEV_MULTINIC is
	  confused with CONFIG_NET_MULTILINK.  Lots of code changed with IPv6
	  that was never compiled with MULTINIC enabled.  Still some problem
	  with parameter passing in the MULTINIC configuration(2015-02-09).
	* net/iob/Kconfig: In IOB Configuration, the default number of IOB
	  chains must be more than zero is UDP read-ahead is enabled (2015-02-10).
	* net/tcp/tcp_conn.c and udp/udp_conn.c: Fix several build errors/warning
	  with IPv4 + IPv6 + multiple networks are enabled (2015-02-10).
	* arch/arm/src/sam34/sam_emac.c: SAM4 Ethernet driver bow supports
	  operation using the high priority work queue so that packet processing
	  can occur outside of interrupt level processing (2015-02-10).
	* SAM4E-EK: The nsh configuration now configures the Ethernet driver
	  for execution on the HP work thread (2015-02-10).
	* arch/arm/src/lpc17xx/lpc17_ethernet.c: Add IPv6 support to the LPC17
	  Ethernet driver.  Untested... I no longer have a proper environment
	  for LPC17 debug (2015-02-10).
	* include/netinet/in.h and libc/net/lib_addrconfig.c: Some extensions
	  to netinet/in.h adding some Linux compatible definitions.  From Macs N
	  (2015-02-11).
	* arch/arm/src/kl:  Add architectural support for the K26Z128VLH4 chip.
	  From Derek B. Noonburg (2015-02-11).
	* configs/freedom-kl26z: Add board support for the Freedom KL26Z board.
	  From Derek B. Noonburg (2015-02-11).

7.9 2015-04-14 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/tiva:  Add support for the TM4C1294.  Contributed by
	  Frank Sautter (2015-02-11).
	* configs/tm4c1294-launchpad:  Add support for the TM4C1294 Launchpad.
	  Contributed by Frank Sautter (2015-02-11).
	* gettimeofday():  Move gettimeofdady() from sched/clock to libc/time.
	  Remove gettimeofday() from NuttX system calls.  It is only a wrapper
	  around clock_settime() and does not need a trap.  gettimeofday() is
	  no longer treated as a core OS interface (2015-02-12).
	* settimeofday(): gettimeofday has been decrecated in POSIX 2008.
	  settimeofday() was never part of POSIX, but I decided to add it to
	  libc as well just for symmetry (2015-02-12).
	* drivers/sensors/mpl115a.c and include/nuttx/sensors/mpl115a.h: Add
	  driver for the Feescale MPL115A baramoter.  From Alan Carvalho de
	  Assis (2015-02-12).
	* configs/viewtool-stm32f107:  Add support for an optional, add-on
	  Freescale MPL115A baramoter.  From Alan Carvalho de Assis
	  (2015-02-12).
	* sched/clock/clock_systimer.c: Fix a problem in clock_systimer64 that
	  occurs when (1) the 64-bit system time is enabled, and (2) the value
	  of CONFIG_USEC_PER_TICK is less than 1 milliseconds (such as when using
	  the tickless mode of operation).  In that case, the conversion of time
	  to 64-bit millisecond value in clock_systmer64() causes some bad times
	  to be returned.  Time was converted to milliseconds, then to configured
	  ticks.  Precision was lost in the millisecond conversion. The fix is
	  to first convert time to a 64-bit microsecond value, then to the
	  configured tick value. Noted by David Sidrane (2015-02-13).
	* include/nuttx/rtc.h, arch.h, and arch/*/src/*_rtc.h: Removed all of the
	  old, malformed RTC interface definitions from include/nuttx/rtc.h.  The
	  necessary prototypes have been removed, renamed, scattered to the wind,
	  hidden under rocks, -- whatever it takes to make it clear that there is
	  no RTC interface callable from application code (2015-02-13).
	* include/nuttx/rtc.h and fs/ioctl.h:  Begin the definition of a proper,
	  driver based RTC interfaces that is better suited to the architectural
	  goals of nuttx (2015-02-13).
	* drivers/timers/timer.c and watchdog.c: Move timer-related drivers from
	  drivers/ to drivers/timers (2015-02-13).
	* drivers/timers/rtc.c:  Add an RTC upper half driver.  This is the driver
	  that is documented in include/nutt/rtc.h (2015-02-13).
	* arch/arm/src/stm32/stm32_rtcc.c and stm32_rtc.h: Break out a new internal
	  interface, stm32_rtc_setdatetime().  This eliminates some un-necessary
	  time conversions.  From Freddie Chopin (2015-02-13).
	* arch/arm/src/stm32/stm32_rtc_lowerhalf.c, Make.defs, and stm32_rtc.h: Add
	  a skeleton implementation of the RTC lower half interface at
	  arch/arm/src/stm32/stm32_rtc_lowerhalf.c.  This is just the framework for
	  the RTC lower half.  None of the interface methods have yet been
	  implemented (2015-02-13).
	* net/icmpv6/icmpv6_advertise.c and icmpv6_solicit.c:  Add inclusion of
	  nuttx/net.h to two files.  Without these there can be compilation errors
	  in certain configurations.  From Max Neklyudov (2015-02-13).
	* net/net_initialize.c, sched/init/os_start.c, and a few other files:
	  Divide net_intiialize() into net_setup() and net_initialize() to solve
	  a chicken-and-egg problem.  net_setup() must be called before
	  up_initialize() is called so that networking data structures are ready
	  to register new network devices.  net_initialize() now does only timer
	  related operations and is called AFTER up_initialize() where the timers
	  are configured.  Problem note by Max Neklyudov (2015-02-14).
	* include/time.h and sys/time.h: Move struct timeval from include/time.h
	  to include/sys/time.h where it belongs (2015-02-15).
	* arch/arm/src/stm32/stm32_rtcc.c, stm32_rtc.h, and Kconfig: Extend the
	  RTC interface to support reading subseconds.  From Jussi Kivilinna
	  (2015-02-16).
	* arch/arm/src/efm32/efm32_usbdev.c: EFM32 USB Device is now basically
	  functional with this change.  From Pierre-noel Bouteville (2015-02-16).
	* include/nuttx/net/ip.h:  Move macros and common logic for IPv4-mapped
	  IPv6 addresses from files in net/ to include/nuttx/ip.h.  These are
	  currently only used for UDP, but will need to be be used in many places
	  in the future (2015-02-17).
	* includes/nuttx/compiler.h:  Add support for the restrict keyword
	  (2015-02-17).
	* include/netdb.h:  Add a mostly-commented-out version of the standard
	  netdb.h header file (2015-02-17).
	* arch/arm/src/tiva/:  Updated files to allow for ADC triggering by the
	  timer. I’ve cleaned up some parts of the ADC code, too, and fleshed
	  out the PWM triggering ioctl.  From Calvin Maguranis (2015-02-17).
	* configs/tm4c123g-launchpad: Add ADC support.  From Calvin Maguranis
	  (2015-02-17).
	* fs/fat/fs_mkfatfs.c:  Use DMA memory for mkfatfs when needed. This makes
	  mkfatfs use fat_dma_alloc() when CONFIG_FAT_DMAMEMORY is set. This is
	  needed to ensure mkfatfs operates with boards that use DMA for microSD.
	  From Andrew Tridgell via the PX4/NuttX repository (2015-02-17).
	* include/nuttx/rtc.h, fs/fs.h, drivers/ramdisk.c, pipes/, and
	  timers/rtc.c: The inode unlink method should not be support if
	  operations on the root pseudo-filesystem are disabled (2015-02-18).
	* include/nuttx/sched timing functions:  Fix some nanosecond comparisons.
	  Comparisons should be greate than OR EQUAL TO 1000000000 for maximum
	  value of nanoseconds in struct tm.  From Juha Niskanen (2015-02-20).
	* tm4c123g-launchpad: Add board button interrupt logic.  From Calvin
	  Maguranis (2015-02-20).
	* "Tiva: Move GPIO prototypes out of arch/arm/include/tiva/irq.h to
	  arch/arm/tiva/tiva_gpio.h where they belong (2015-02-20).
	* arch/arm/src/tiva: Tiva GPIO clean-up by Calvin Maguranis (2015-02-20).
	* arch/arm/src/stm32/stm32_pwr.c, stm32_pwr.h, and stm32_rtcc.c: Changes
	  to support fully write protecting the backup domain. N.B.
	  stm32_pwr_enablebkp did not account for the delay from enable to the
	  domain being writable. The KISS solution is a up_udelay. A more
	  complex solution would be a negated write test with restore.  From
	  David Sidrane (2015-02-21).
	* arch/arm/src/stm32/stm32_bbsram.c, stm32_bbsram.h, Kconfig, and
	  Make.defs: Adds the ability to use the STM32F2 and STM32F4 Battery
	  Backedup SRAM in the file system. With an option to Save Panic
	  context to one of the files. From David Sidrane (2015-02-21).
	* configs/pic32mx-starterkit:  Rename from pic32-starterkit to make
	  room on the namespace for a pic3mz-starterkit.  Update src/ directory
	  file naming to match current standard.  Refresh configurations.  Move
	  linker scripts to a new scripts/directory.  Make sure that it builds
	  using the Pinquino toolchain (2015-02-21).
	* arch/mips/src/mips32/Toolchain.mk: Current Pinguino toolchain uses
	  the prefix p32- instead of mips- (2015-02-21).
	* configs/pic32mz-starterkit: Add basic board support for the PIC32MZ
	  (can't build yet of course because there is not yet any PIC32MZ
	  support) (2015-02-22).
	* arch/mips/src/pic32mz and include/pic32mz:  Add some PIC32MZ header
	  file definitions and just enough logic in the source directory so
	  that we can run 'make menuconfig'.  Still a very long way from being
	  complete (2015-02-22).
	* libc/time/lib/lib_sfrtime.c:  Missing implementation of %C in
	  sfrtime() C (was being treated as %y).  From Freddie Chopin
	  (2015-02-23).
	* drivers/can.c: In the can_open function: this line
	  'dev->cd_ocount = tmp;' needs to be moved a few lines down otherwise
	  the open count will only be incremented from 0 to 1. This causes
	  problems when trying to open the can bus from two different tasks.
	  SourceForge Patch #46 from Anonymous (2015-02-23).
	* Tiva TM4c1294: Updates from Frank Sautter (2015-02-24).
	* fs/aio: correct some backward tests in aio_read() and aio_write():
	  Socket descriptors have higher numbers than file descriptors.  In
	  aio_contain(),  Copy u.ptr (void *) when initializing aioc and not
	  the case specific u.aioc_filep.  From Michal Ulianko (2015-02-24).
	* include/pthread.h: Fix PTHREAD_COND_INITIALIZER (2015-02-24).
	* sched/clock/clock_systimespec.c:  When an RTC is used clock_systimespec()
	  must subtract the basetime from the returned time.  It needs to
	  return the time since power up, no the current time.  Issue noted
	  by Max Neklyudov (2015-02-25).
	* fs/vfs/fs_select.c and sched/semaphore/sem_timedwait.c: Fix places
	  where the errno value was being overwritten by subsequent actions so
	  that the returned errno value was incorrect.  From Max Neklyudov
	  (2015-02-25).
	* include/sys/select.h: Extend the fd_set type definition so that it
	  can handle more than 32 descriptors (if so configured).  From Max
	  Neklyudov (2015-02-25).
	* net/netdev/netdev_unregister.c:  Fix a list handling error in
	  netdev_unregister().  From Max Neklyudov (2015-02-27).
	* net/netdev/netdev_register.c: Improve the network device registration
	  logic.  When multiple link types are used, modify how each interface
	  number is assigned to the device name by incrementing the device
	  number individually for each interface link type.  From Max Neklyudov
	  (2015-02-27).
	* include/nuttx/board.h:  Remove common board function prototypes from
	  other files and consolidate them in this new header file (2015-02-27).
	* arch/mips/src/pic32mz/: Implement support IO port interrupts
	  (2015-03-01).
	* configs/pic32mz-starterkit/src: Add support for on-board buttons
	  (2015-03-01).
	* include/nuttx/spi/spi.h:  Add an SPIDEV_USER so that there can be
	  board-specific definitions of SPI devices (2015-03-01).
	* arch/arm/src/stm32 and arch/arm/src/stm32: Adds architecture support
	  for the STM32F372 and F373 (no board support yet). Only tested on
	  STM32F373CC, but should work on the rest.  Contributed by  Marten
	  Svanfeldt (2015-03-01).
	* arch/mips/src/pic32mz/pic32mz-spi.c and chip/pic32mz-spi.h:  Add
	  support for a basic SPI driver for the PIC32MZ (2015-03-03).
	* include/nuttx/i2c.h:  Add a user provided void * argument to the
	  I2C callback method for the I2C slave interface.  Suggested by
	  Nate Weibley (2015-03-03).
	* crypto/, include/nuttx/crypto, and arm/src/common/up_initialize.c:
	  Fix issues when AES support was added for the STM32L1.  From Juha
	  Niskanen (2015-03-04).
	* arch/arm/src/stm32/stm32_spi.c and .h: Add missing SPI callback
	  functions to the STM32 SPI driver.  From Freddie Chopin (2015-03-04).
	* arch/*/src/*/*_assert.c, configs/Kconfig, and include/nuttx/board.h:
	  Add support for dumping board-specific information on assertion.
	  From David Sidrane (2015-03-04).
	* drivers/spi/Kconfig: Add missing CONFIG_SPI_CALLBACK selection.  Noted
	  by Freddie Chopin (2015-03-04).
	* arch/arm/src/samv7 and include/samv7:  Add basic build directories
	  and configuration logic for the Atmel SAMV7 family (2015-03-05).
	* arch/arm/src/Makefile, armv7-m/Toolchain.defs: Make ARM build system
	  Cortex-M7 ready (2015-03-05).
	* arch/arm/src/sam34/sam_start.c:  Leverage start-up logic from STM32
	  to (1) Enable the FPU and (2) perform IDLE stack coloration
	  (2015-03-05).
	* arch/arm/src/armv7-m/up_lazyexception.S, Kconfig and severl other
	  files:  Add support for lazy FPU state saving.  Not yet verified.
	  (2015-03-06).
	* arch/arm/Kconfig, Make.defs, sam_start.c, configs/Kconfig,
	  samv71-xult: Add a bare bones framework that will do nothing more than
	  support configuration for the Atmel SAMV71 Xplained Ultra board.  Very
	  much a work in progress (2015-03-06).
	* sched/mqueue/mq_timedsend.c:  Should not check for valid time if
	  there is space in the message queue.  Noted by Freddie Chopin
	  (2015-03-10).
	* arch/arm/src/tiva/tiva_timerlib.c:  Fix a typo in peripheral wait
	  logic:  gptm, not gpio.  From Bradley Noyes (2015-03-10).
	* drivers/net/tun.c, Make.defs, include/nuttx/net/net.h, tun.h, and
	  net/Kconfig: Add TUN device.  From Max Neklyudov (2015-03-11).
	* fs/fat/fs_fat32.c: fat_unbind() was accessing 'fs->fs_sem' after
	  freeing the 'fs' struct. From Juha Niskanen (2015-03-11).
	* fs/procfs/fs_procfsproc.c: fs_procfsproc: Fix potential NULL pointer
	  dereference of 'node'.  From Juha Niskanen (2015-03-12).
	* sched/sched/sched_waitpid.c: Do not use uninitialized boolean in
	  waitpid().  From Juha Niskanen (2015-03-12).
	* libc/stdio/lib_ungetc.c:Fix NULL pointer dereference in ungetc().
	  If 'stream' was NULL, 'stream->fs_oflags' was evaluated.  From Juha
	  Niskanen (2015-03-12).
	* arch/arm/src/stm32/stm32_i2c.c: Add missing NULL check.  From Juha
	  Niskanen (2015-03-12).
	* drivers/usbdev/usbmsc_scsi.c: Add NULL pointer check.  From Juha
	  Niskanen (2015-03-12).
	* drivers/bch/bchdev_driver.c: Avoid NULL pointer dereference when
	  bch->refs  == 255.  From Juha Niskanen (2015-03-12).
	* arch/arm/src/armv7-m/mpu.h:  Bad syntax in ARMv7-M MPU logic would
	  cause failure to write the correct value to the MPU_RASR register.
	  From Juha Niskanen (2015-03-12).
	* net/socket/net_dupsd.c: Do not call sockfd_socket() twice.  From
	  Juha Niskanen (2015-03-12).
	* arch/arm/src/stm32/stm32_usbdev.c: Fix stale initialization
	  invalidating later NULL check.  From Juha Niskanen (2015-03-12).
	* arch/arm/src/stm32/stm32_serial.c and chip/stm32f10xxx_dma.h: Fix
	  RX DMA setup for UART5.  From  Jussi Kivilinna (2015-03-13).
	* arch/arm/src/stm32/stm32_serial.c: Make input hardware flow-control
	  work with RX DMA.  From Jussi Kivilinna (2015-03-13).
	* drivers/pipes/pipe_common.c: Fix zero-lenth writes to pipes/FIFOs.
	  From Jussi Kivilinna (2015-03-13).
	* drivers/serial/serial.c: Report correct number of bytes free in
	  serial buffer with FIONWRITE.  From Sami Pelkonen via Jussi Kivilinna
	  (2015-03-13).
	* drivers/mmcsd/mmcsd_spi.c: Debugging and manuals (this one
	  https://www.sdcard.org/downloads/pls/simplified_specs/part1_410.pdf
	  and this one https://www.sdcard.org/downloads/pls/simplified_specs/part1_410.pdf)
	  shows that ACMD23 must be preceded with CMD55 command as any other
	  ACMD commands. Also, after the block reading wait loop must be
	  inserted before writing the next block of data to the sd card.  From
	  Dmitry Nikolaev via Jussi Kivilinna (2015-03-13).
	* arch/arm/src/efm32/efm32_i2c.c:  Add I2C driver.  From Pierre-noel
	  Bouteville (2015-03-14).
	* fs/mount/, include.sys/mount, syscall/:  Add umount2().  umount() is
	  now a macro that just calls umount2() with flags = 0 (2015-03-14).
	* fs/mount/fs_umount2.c, all file systems, include/nuttx/fs/fs.h:  Pass
	  the umount2() flags to every unbind() implementation.  That is where
	  the decision to umount or not will be made (2015-03-14).
	* fs/fat/fs_fat32.c: Fix a bug in the FAT unbind() logic.  There were
	  problems with the way certain internal list handling was implemented.
	  The end result is that newly opened or cloned file structures were
	  never being added to the list of open files.  So when the unmount()
	  happens, it always looked like there were not open files and a crash
	  could ensue (2015-03-14).
	* fs/fat/fs_fat32.c and fs_fat32.h: Add support for umount2(target,
	  MNT_FORCE) in the FAT file system (2015-03-15).
	* drivers/mmcsd/mmcsd_sdio.c:  Fix some bad logic when file system debug
	  is turned on:  Arguments to syslog were missing so that garbage was
	  being printed (2015-03-15).
	* arch/arm/src/sama5/sam_hsmci.c:  Fix a bug in SAMA5 HSMCI.  The
	  bitfield mask and shift values were reversed resulting in a trashed
	  value for the number of blocks in the BLOCKR register.  This was
	  sufficient to prevent DMA writes from working (2015-03-15).
	* drivers/mtd/at24xx.c, Kconfig, and include/nuttx/fs/ioctl.h:  Add
	  support for (1) the byte-oriented read() method, (2) devices that
	  have extended memory regions, and (3) devices that use 8-bit
	  addressing (2015-03-17).
	* arch/mips/src/mips32/Kconfig, Toolchain.defs, and
	  configs/pic32mz-starterkit/nsh/Make.defs:  Changes that will permit
	  building of the PIC32MZ Start Kit configuration using MPLAB and the
	  XC32 toolchain.  From David Sidrane (2015-03-17).
	* arch/arm/src/stm32/stm32_rtc_lowerhalf.c:  Fix some errors in the
	  STM32 RTC lower-half driver that cause compilation failures.  From
	  shilo.xyz (2015-03-19).
	* arch/arm/src/sama5/chip/sam_tc.h: Fix typos in timer/counter header
	  file.  From Bob Doiron (2015-03-20).
	* configs/olimexino-stm32: Board support for the Olimexino STM32 board
	  from David Sidrane (2015-03-20).
	* PIC32MZ:  Incorporated a set of patches that makes the basic NSH
	  configuration on the PIC32MZ Starter Kit.  From Kristopher Tate
	  (2015-03-22).
	* arch/arm/src/tiva: (1) ADC driver has been re-organized; configuration
	  is now handled in code instead of Kconfig to help reduce bloat and
	  confusion. (2) Timer changed to remove ADC coupling in Kconfig to code
	  and moved configuration up from arch/arm/src/tiva to
	  configs/tm4c123g-launchpad/src. (3) GPIO driver needed small fixes in
	  the configuration routines and discovered false-positive bugs in
	  interrupt testing: interrupts are now verified to actually be working
	  reliably. (4) Attempt to apply some consistency in the tiva arch/
	  level's interface to the config/board/ level driver configuration.
	  From Calvin Maguranis (2015-03-23).
	* arch/mips/src/pic32mz: Various fixes for Ethernet support.  Still
	  not fully functional.  From Kristopher Tate (2015-030-29).
	* arch/arm/src/armv7-m:  Add configuration option and logic to support
	  the D-Cache in write-through mode (2015-03-29).
	* arch/arm/src/stm32/Kconfig, stm32_lse.c, stm32_lsi.c, stm32_rtc.c/.h,
	  stm32_rtcc.c, stm32_rtcounter.c, and stm32f*_rcc.c: The
	  STM32F4Discovery board doesn't come with a Low speed external
	  oscillator so the default LSE source for the RTC doesn't work. In
	  stm32_rtcc.c the up_rtc_initialize() logic doesn't work with the LSI.
	  The check on RTC_MAGIC on the BK0R register lead to rtc_setup() call
	  that rightfully enables the lsi clock; but the next times, when the
	  rtc is already setup, the rtc_resume() call does NOT start the lsi
	  clock! The right place to put LSE/LSI initialization is inside
	  stm32_stdclockconfig() in stm32fxxxxx_rcc.c.  Doing this I checked
	  the possible uses of the LSI and the LSE sources: the LSI can be used
	  for RTC and/or the IWDG, while the LSE only for the RTC (and to output
	  the MCO1 pin). This change is not verifed for any other platforms.
	  From Leo Aloe3132
	* Rename arch_nshinitialize() to board_app_initialize() (2015-03-30).
	* ./*.mk, configs/.gitignore, Makefile, boardctl.c, include/nuttx/fs/ioctl,
	  include/sys/boardctl.h, syscall.h, and syscall/:  Add a new non-
	  standard OS interface called boardctl().  This is similar to a driver
	  IOCTL call.  But this is an IOCTL call directly on the board logic.
	  This function will eventually replace all of the ad hoc OS interfaces
	  that are current used to perform application specific initialization
	  and application driver test configuration.  It essentially formalizes
	  and institutionalizes these rogue interface in to at least a single
	  crazy call (2015-03-31).
	* configs/: Modify all configurations:  Make sure that
	  CONFIG_LIB_BOARDCTL=y appears wherever CONFIG_NSH_ARCHINIT=y appears.
	  Remove support for CONFIG_NSH_ARCHMAC.  It is not used and there are
	  better ways to do that operation (2015-03-31).
	* configs/Kconfig, boardctl.c, all touchscreen driver setup functions,
	  include/board.h, include/sys/boardctl.h, and
	  include/nuttx/input/touchscreen.h: arch_tcinitialize() and
	  arch_tcunitinitialize() renamed to board_tsc_setup() and
	  board_tsc_teardown().  These are not long called directly by
	  applications but only indirectly throught the crappy boardctl() OS
	  interface (2015-03-31).
	* configs/Kconfig, boardctl.c, include/nuttx/board.h, include/sys/boardctl.h,
	  and several ADC files in configs/<board>/src/:  Rename adc_devinit() to
	  board_adc_setup().  Add support to the boardctl() interface so that it
	  can call board_adc_setup() on behalf of an application.  Make sure that
	  the proper features are enabled in the defconfig files that have
	  CONFIG_EXAMPLES_ADC=y (2015-03-31).
	* configs/*/defconfig:  Make sure that all defconfig files that require
	  external graphics intiialization also enable the correct boarctl()
	  settings (2015-03-31).
	* include/nuttx/board.h, include/sys/boardctl.h, nuttx/configs/Kconfig and
	  boardctl.c, and board configurations and PWM implementations: Rename
	  pwm_devinit() to board_pwm_setup().  Add CONFIG_BOARDCTL_PWMTEST that
	  will enable calling board_pwm_setup() from boardctl().  In all
	  configurations that enable the apps/examples/pwm test, make sure that
	  boardctl() support is properly enabled (2015-03-31).
	* Move include/nuttx/timer.h, rtc.h and watchdog.h to include/nuttx/timers/.
	  (2015-04-01).
	* drivers/timer/cs2100-cp.c and include/nuttx/timers/cs2100-cp.h: Add a
	  very basic driver for the CS2100-CP Fractional-N Multipler chip (2015-04-02).
	* configs/, graphics/, include/nuttx:  More renaming: up_lcdinitialize->board_lcd_initialize,
	  up_lcdgetdev->board_lcd_getdev, up_lcduninitialize->board_lcd_uninitialize
	  (2015-04-04).
	* include/nuttx/nx, libnx/nx, libnx/nxtk: Add a new 'capped' parameter to
	  nx_drawline(), nxtk_drawlinetoolbar(), and nxtk_drawlinewindow()
	  (2015-04-05).
	* libnx/nx/nx_drawline.c, libnx/nxtk/nxtk_drawlinetoolbar.c and
	  nxtk_drawlinewindow.c: Implement line caps by drawing a file circle at
	  the each endpoint of a line with a radius equal to half of the width
	  of the line (2015-04-05).
	* include/time.h, nuttx/time.h, libc/time/lib_dayofweek.c and
	  lib_gmtimer.c: Implements CONFIG_TIME_EXTENDED as we discussed
	  relative to providing the last 3 members of the tm struct and support
	  for filling them in and even using the wday in the STM32 RTC. From
	  David Sidrane.
	* arch/arm/src/sam34/sam_serial.c and samv7/sam_serial.c:  A side-effect
	  of changing serial settings via TERMIOS (such as tcsetattr) is that
	  serial interrupts were being left disabled.  This is not a problem if
	  the serial configuration is changed when there are no open references
	  to the serial device.  In that case, serial interrupts are disabled and
	  will not be enabled enabled until the serial device is first opened.
	  But it is fatal if the serial device is already opened and if there is
	  a task waiting to receive data.  In that case, the side-effect of
	  disabling interrupts is fatal:  That task is then left hanging with
	  interrupts disabled (2015-04-08)
	* arch/arm/src/sama5/sam_serial.c:  Backport support for flowcontrol and
	  termios from SAM3/4 -- UNVERIFIED. (2015-04-08).
	* arch/arm/src/sam34/sam_serial.c and samv7/sam_serial.c: The IMR
	  register is read-only.  This means that sam_restoreints() did not
	  actually re-enable UART interrupts (2015-04-08).
	* sigaddset() and sigdelset(): Need to set errno if a bad signal number
	  is received (2015-04-09).
	* sighold(), sigrelse(), sigignore(), sigset() and sigpause():  New
	  signal handling functions (2015-04-09).
	* Fixes to asinh(), atanh(), and sinh():  The 'basic' expansions all
	  exhibited bad cancellation errors near zero (<= 1E-10). This can be
	  easily seen e.g. with x = 1E-30, the results are all zero though they
	  should be extremely close to x. The cutoff values (1E-5, 1E-9) are
	  chosen so that the next term in the Taylor series is negligible (for
	  double). Functions could maybe be optimized to use only first term (x)
	  and a smaller cutoff, just bigger than where the cancellation occurs
	  (2015-04-09).
	* syscall/syscall.csv: Last changes to message queue prototypes did not
	  make it into call gate logic (2015-04-09).
	* syscall/syscall_stublookup.c: Fix some errors that crept in recently
	  (2015-04-09).
	* libc/time/lib_localtime.c: Inconsistent configuration name:
	  CONFIG_LIBC_TZDIR vs CONFIG_LIBC_TZ_TZDIR.  Former wins (2015-04-11).
	* libc/time/lib_calendar2utc.c and lib_mktime.c: Fix an error in time
	  initialization when there is not RTC and the time is initialized from
	  a fixed configured value. The call to clock_calendar2utc() was
	  returning the time in units of seconds.  The initialization logic,
	  however, was expecting to get time in units of days.  This problem
	  has been there forever but obviously has not significant impact to
	  behavior in systems where time is not visible (2015-04-12).
	* fs/fat/fs_fat32utils.c:  Fix misthink when CONFIG_ENDIAN_BIG=y.  From
	  Lwazi Dube (2015-04-12).
	* include/nuttx/net/netdev.h, net/devif/ipv6_input.c,
	  icmpv6/icmpv6_rsolicit.c and net/icmpv6/icmpv6_solicit.c: Use common
	  macro(s) for calculating link layer header length.  From Brennan
	  Ashton (2015-04-13).
	* apps/netutils/pppd/Kconfig, pppd.c, and ntpv3.h (removed):  Remove
	  ntpclient header file in and NTP client references from the pppd
	  dir.  From Brennan Ashton (2015-04-13).
	* configs/galileo: Remove all references to the Galileo board.  That
	  port is not going to happen (I don't even have the hardware anymore)
	  (2015-04-13).
	* drivers/input/max11802.c:  Fix possible unmatched IRQ restore.  Noted
	  by Juha Niskanen (2015-04-14).
	* atexit(): Fix reference to undefined variable in certain
	  configurations.  From Juha Niskanen (2015-04-14).

7.10 2015-06-09 Gregory Nutt <gnutt@nuttx.org>

	* configs/sim/src/sim.h, sim_zoneinfo.c, Makefile, and sim_boot.c: Add
	  logic to test localtime and TZ database.  See apps/system/README.txt
	  for info (2015-04-15).
	* libc/Kconfig: Fix defaults for timezone limits.  They need to be much
	  larger (2015-04-15).
	* Watchdog files:  Fix repeated typo wachog.h in several watchdog
	  drivers (2015-04-15).
	* configs/boardctl.c and Kconfig:  Add missing causing that caused
	  failures of PWM test (2015-04-15).
	* arch/arm/src/stm32: Defines a second interface for the dma2d controller.
	  Controlling both LTDC and DMA2D was unpractical from the programmers
	  view because both controllers are to different. LTDC only controls the
	  display visibility but the DMA2D controller changes the content of the
	  frame buffer (buffer of the layer).

	  The main features are:

	  1. DMA2D interface
	     Supports the nuttx pixel formats:
	     - FB_FMT_RGB8
	     - FB_FMT_RGB24
	     - FB_FMT_RGB16_565
	     Dynamic layer allocation during runtime for the supported formats
	     - The number of allocatable layer can be configured.
	     Supported dma2d operation:
	     - blit (Copy content from source to destination layer) also works
	       with selectable area.
	     - blend (Blend two layer and copy the result to a destination layer
	       which canbe a third layer or one of the source layer) also works
	       awith selectablerea.
	     - fillarea (Fill a defined area of the whole layer with a specific
	       color)

	  As a result of that the dma2d controller can't transfer data from the
	  core coupled memory, CCM is disabled but usable by the ccm allocator.
	  Currently the ccm allocator is used for allocating the layer structure
	  only. For the dma memory (layers frame buffer) memory is allocated from
	  heap 2 and 3.

	  2. LTDC interface
	     I have changed the api for the currently non implemented operations:
	     - blit (Copy content from a dma2d layer to an ltdc layer) also works with
	       selectable area.
	     - blend (Blend two dma2d layer and copy the result to a destination ltdc
	       layer) also  works with selectable area.

	       Note! ltdc layer is a layer referenced by the ltdc interface. dma2d layer
	       is a layer referenced by the dma2d interface.

	       One of the most important questions for me was, How can i flexible use an
	       ltdc layer with the dma2d interface, e.g. as source layer for dma2d
	       operations?
	       Get the layer id of the related dma2d layer by a special flag when using
	       getlid() function of the ltdc interface and use the layer id to reference
	       the specific dma2d layer by the dma2d interface.

	       The ltdc coupled dma2d layers are predefined and can't be dynamically
	       allocated of freed. They use the same frame buffer memory and the same
	       color lookup table.

	     Changes:
	     - layer internal format of the clut table
	     - interrupt handling for register reload (vertical vblank) instead using
	       waiting loop
	     - small fixes and refactoring
	  From Marco Krahl (2015-04-16).
	* Add support for the new DMA2D features to the STM32F429i-Disco LTDC
	  configuration.  From Marco Krahl (2015-04-16).
	* stdlib.h:  MAX_RAND should be RAND_MAX (2015-04-16).
	* STM32F429i Disco: (1) Fix a bad return value if the LCD driver is already
	  initialized. (2) The LCD driver initialization is now performed during the
	  early boot sequence.  (3) Increased the size of the message queue from 32
	  to 64 in the lcd configuration.  From Marco, ocram.lhark@yahoo.com
	  (2015-04-17).
	* STM23 RTC: Fix an error introduced into stm32_pwr_enablebkp().  That
	  function must preserve the previous state of backup domain access on
	  return (2015-04-19).
	* include/nuttx/usb/hub.h: Add USB hub header file from Kaushal Parikh
	  (2015-04-18).
	* drivers/usbhost/usbhost_hub.c: Bring in USB hub-related files from
	  https://github.com/kaushalparikh/nuttx.  This is the work of Kaushal
	  Parikh.  This initial commit is incomplete.  This is quite a bit more
	  hub logic that needs to come in before the port is complete
	  (2015-04-18).
	* arch/arm/src/stm32/stm32_rtcounter.c: Now need to enable backup
	  domain write access when setting the time.  From Darcy Gong (2015-04-19).
	* include/nuttx/usb/usbhost.h:  Bring in more logic from
	  https://github.com/kaushalparikh/nuttx (2015-04-19).
	* drivers/usbhost/usbhost_enumerate.c: Last of USB hub logic from
	  https://github.com/kaushalparikh/nuttx (2015-04-19).
	* include/time.h:  Add prototypes for localtime() and localtimer_r()
	  (2015-04-21).
	* include/assert.h: Wrap definitions of assertion macros in do while.
	  Suggested by orbitalfox (2015-04-22).
	* sched/semaphore/sem_wait.c:  Missing comma on debug statement caused
	  compile error with DEBUG on.  Why hasn't that been noted before?
	  (2015-04-23).
	* drivers/lcd and include/nuttx/drivers: RA8875 LCD driver contributed
	  by Marten Svanfeldt (2015-04-24).
	* arch/arm/src/stm32/chip/stm32_pwr.c and .h: Adds support for STM32's
	  Programmable Voltage Detector (PVD) feature. Register access is behind
	  CONFIG_STM32_ENERGYLITE as the feature has not been verified for
	  F1/F2/F4 etc. manuals. Tested on STM32L1. PVD interrupt looks generic,
	  at least #defines it needs are in headers for every chip variant.  By
	  Dmitry Nikolaev, submitted by Juha Niskanen (2015-04-28).
	* arch/arm/src/stm32/chip/stm32_exti.h, stm32f30xxx_memorymap.h, and
	  stm32f37xxx_memorymap.h:  Added missing EXTI definitions for the STM32
	  F3; Correct an error the port D base address in the STM32 F30x and F37x
	  memory maps.  From Greg Meiste (2015-05-01).
	* arch/arm/src/lpc17xx/lpc176x_gpio.c:  Reorder steps when an output
	  GPIO is configured in order to avoid transient bad values from being
	  output.  From Hal Glenn (2015-05-02).
	* arch/arm/src/stm32/stm32_otgfsdev.c and stm32_otghsdev.c: Add
	  protection in the event that out-of-bound endpoint numbers are
	  received.  From David Sidrane (2015-05-02).
	* USB host:  Merged in the USB hub support that has been happening on
	  a separate branch up until this point.  The interfaces are complete
	  and most platforms have been verified (still a little to be done
	  however). (2015-05-02)
	* arch/arm/src/lpc31xx/lpc31_ehci.c, chip.h, sama5/sam_ehci.c, and
	  chip.h:  Fix cache related problem in LPC31 and SAMA5Dx EHCI drivers.
	  All buffers are now aligned with the cache line size in both starting
	  address and in length.  This cause major problems in unlucky builds
	  where the USB host buffers where unaligned and abutting other data.
	  The cache flush and invalidate operations could be subverted by
	  accesses to adjacent data or could have unexpected side effects.  This
	  bug has been in the ECHI drivers forever, but was only revealed due to
	  unlucky memory allocations during the integration of the hub feature
	  (2015-05-03).
	* arch/arm/src/lpc17xx/lpc17_usbhost.c:  Correct some initialization of
	  data structures.  When hub support is enabled, it would overwrite the
	  end of an array and clobber some OS data structures (2015-05-03).
	* configs/olimex-lpc1766stk:  Make stacks usage configurable for USB
	  host waiter. It needs to be a lot deeper when hub support is enabled
	  (2015-05-03).
	* fs/vfs/fs_poll.c: Fix resource leak and memory corruption on poll
	  failure.  From Jussi Kivilinna (2015-05-04).
	* All USB host drivers in arch/ and all USB class drivers in drivers/usbhost:
	  Modify the transfer() and asynch() methods so that the actual size of
	  the transfer is returned.  Unverified on initial commit (2015-05-05).
	* drivers/usbhost/usbhost_cdcacm.c: Add initial implementation of a host-
	  side CDC/ACM driver.  Completely untested on initial commit (2015-05-06).
	* configs/, drivers/usbhost/usbhost_storage.c, and included/nuttx/usb/usbhost.h:
	  Rename usbhost_storageinit() to usbhost_msc_initialize().  Add calls
	  to usbhost_cdcacm_initialize() if CONFIG_USBHOST_CDCACM is selected
	 (2015-05-06).
	* arch/arm/include/kl and src/kl: Add support for the KL25Z64.  The
	  KL25Z64 is a lower memory variant of the KL25Z128 and is used on the
	  Teensy LC.  From Michael as SourceForge patch 50 (2015-05-07)
	* configs/teensy-lc and related board support files: Add board support
	  for the Teensy LC board.  Support is based off the Freedom KL25Z board.
	  LED, PWM, and UART0 have been tested. The SPI pins are mapped
	  correctly but have not yet been tested.  From Michael Hope as
	  SourceForge patch 51 (2015-05-07).
	* arch/arm/src/kl/kl_pwm.c:  Fix PWM debugging. TPM1 and TPM2 have two
	  channels instead of six and will hard fault if you try to read the
	  missing channels.  From Michael Hope (2015-05-07).
	* arch/arm/src/kl/kl_lowputc.c: enable the clocks to UART1 and UART2.
	  The previous version would cause a hard fault on startup due to the
	  modules not being clocked.  Also drop the GPIO configuration as it's
	  done during kl_start().  From Michael Hope (2015-05-07).
	* teensy-lc: remap UART0 to the standard pins. From Michael Hope
	  (2015-05-07).
	* arch/arm/src/stm32 and include/stm32: Added support for STM32F302K8
	  and STM32F302K6.  From Ben Dyer via PX4/David Sidrane (2015-05-08).
	* configs/compal_e86: Calypso Compal-E86: Updates for execution out of
	  FLASH on the C139 phone.  From Craig Comstock (2015-05-08).
	* STM32 F3:  Add DBGMCU register definitions for the F3 family.  From
	  Greg Meiste (2015-05-09).
	* arch/arm/src/stm32/chip/stm32_exti.h: Add EXTI line definitions for
	  the STM32L family (2015-05-09).
	* net/tcp/tcp.h:  Correct failures in long Telnet sessions by increasing
	  the size of the number of bytes sent from uint16_t to uint32_t.  This
	  avoids an integer overflow that causes a Telnet sessions to be closed
	  unexpectedly.  From Rony XLN (2015-05-12).
	* include/stdio.h, sys/statfs.h, cxx/cstdio, and syscall/syscall.csv:
	  Remove duplicate prototype of statfs from stdio.h.  Belongs in
	  sys/statfs.h only.  Note by Michael Hope (2015-05-12).
	* arch/arm/include/kl/chip.h: Fix typo in header file. From Michael
	  Hope (2015-05-12).
	* arch/arm/src/kl/chip/kl_tpm.h: Fix offset to the TPM status register.
	  From Michael Hope (2015-05-12).
	* net/local/local_connect.c: Correct some network lock logic:  Two
	  error conditions where the network was not being unlocked and one
	  where it was getting unlocked twice.  From Jussi Kivilinna (2015-05-12).
	* net/local/, fs/vfs/fs_poll.c, drivers/pipes/pipe_common.c/.h,
	  include/nuttx/fs/fs.h: Add poll support for Unix stream sockets.  From
	  Jussi Kivilinna (2015-05-12).
	* net/local/: Local stream sockets had problem of double releasing pipes
	  (both server and client attempt release), which causes wrong pipe pair
	  being closed in multi-client case. Solve by adding per connection
	  instance ID to pipe names.  From  Jussi Kivilinna (2015-05-12).
	* drivers/usbdev/ all class drivers:  There needs to be a check to make
	  sure that the size of a returned string does not exceed the size of
	  the allocated request buffer.  Strings such as vendor names or product
	  names will be truncated to fit in the request buffer (2015-05-12).
	* arch/arm/src/samv7/sam_twihs.c:  Fix SAMV TWIHS logic that performs
	  multi-message transfers with and without repeated starts (2015-05-12).
	* maXTouch Xplained Pro:  The above TWIHS fix was the last barrier to
	  getting the touchscreen working in the maXTouch Xplained Pro LCD
	  (2015-05-12).
	* net/route/ and net/netdev/netdev_ioctl.c: Complete implementation of
	  the IPv6 routing logic.  From Max Neklyudov (2015-05-13).
	* net/udp/: Add inclusion of assert.h in networking files where needed
	  to avoid compilation errors.  From Max Neklyudov (2015-05-13).
	* /net/route/netdev_router.c: Fix bug in IPv6 router from Max Neklyudov
	  (2015-05-13).
	* sched/pthread/pthread_kill.c: Re-implemented pthread_kill().  It was
	  just a simple wrapper around kill() but since the correct dispatching
	  of signals for multi-threaded task groups has been implemented,
	  calling kill() does not do what pthread_kill() is supposed to do.  The
	  corrected implementation of pthread_kill() will direct the signal
	  specifically to the specific pthread and no other (2015-05-13).
	* arch/arm/include/samdl, arch/arm/src/samdl, configs/samd20-xplained:
	  Rename the samd/ directories and configuration varialbes to samdl to
	  all the same directory structure to support the SAML21 (2015-05-14).
	* arch/arm/include/samdl and arch/arm/src/samdl: And chip definitions,
	  configuration framework, and placeholder memory map and pin
	  configuration files for SAML21 support.  Still incomplete on initial
	  commit (2015-05-14).
	* include/nuttx/wdog.h, sched/mqueue/mq_timed*.c, semaphore/sem_timed*.c,
	  signal/sig_timed*.c, timer/timer_settime.c, and wdog/wd_start.c:
	  Update the type passed to watchdog timer handlers.  Using uint32_t is
	  a problem for 64-bit machines (2015-05-18).
	* configs/saml21-xplained:  Add a board build configuration for the
	  SAML21 Xplained Pro.  Initial commit is just the SAMD20 Xplained Pro
	  board support with naming changed.  Does not yet build (2015-05-18).
	* libc/net/lib_inetntoa.c: Correct errors in printing IP address when
	  type char is signed.  From Max Neklyudov (2015-05-19).
	* arch/arm/src/efm32/efm32_rtc_burtc.c: Updated EFM32 RTC driver from
	  Pierre-noel Bouteville (2015-05-19).
	* arch/arm/src/tiva/chip/tm4c_memorymap.h, tm4c_pinmap.h, and vectors.h.
	  configs/tm4c1294-launchpad/include/board.h and src/tm4c_autoleds.c:
	  Fixes for Tiva TM4C1294NCPDT.  From Frank Sautter.  (2015-05-20).
	* configs/tm4c1294-launchpad/include/board.h:  Added TM4C1294NCPDT
	  EN0_LED2 (10/100-Base-Tx); removed all booster pack pin definitions.
	  From Frank Sautter (2015-05-20).
	* nuttx/arch/arm/src/sam34/sam_serial.c:  In NONBLOCKING mode serial
	  does not receive bytes from UART.  This happens because RX interrupt
	  was disabled in the setup routine.  To fix this I save interrupt
	  configuration before UART shutdown and restore it after.  From Max
	  Neklyudov (2015-05-21).
	* arch/arm/include/lpc11xx and src/lpc11xx:  Support for the LPC11xx
	  family (the LPC1115 MCU in particular).  Contributed by Alan Carvalho
	  de Assis (2015-05-22).
	* configs/lpcxpresso-lpc1115:  Support for the LPCXpression LPC1115
	  board.  Contributed by Alan Carvalho de Assis (2015-05-22).
	* arch/arm/src/sam34/Kconfig, sam_serial.c, and chip/sam_uart.h:  Add
	  support for optical mode for the SAM4CM UART1.  From Max Neklyudov
	  (2015-05-23).
	* arch/arm/src/lpc11xx/: Add support for up_getc() which is needed
	  for NSH if there is no file system.  From Alan Carvalho de Assis
	  (2015-05-23).
	* LPCXpresso-LPC1115:  Add a minimal NSH configuration that has the
	  file system disabled.  Update README with OpenOCD instructions.
	  From Alan Carvalho de Assis (2015-05-23).
	* Fix numerous typos in configuration variable names.  Tracked down
	  by Alan Carvalho de Assis (2015-05-23).
	* configs/teensy-2.0:  Rename configs/teensy so that it is clearly
	  distinguished from teensy-lc and teensy-3.1 (2015-05-15).
	* include/nuttx/mtd/mtd.h:  Increase the size of the fields in the
	  geometry structure (again) to support larger FLASH sizes.  Needed
	  by Sébastien Lorquet (2015-05-26).
	* SAM4CM and SAMA5D Free-running timer: Logic that samples the free
	  running counter reads the pending interrupt status register and
	  can cause interrupts to be lost.  So, if when the status register
	  is read, the logic must also handle the timer overflow event.
	  Found and fixed by Max Neklyudov (2015-05-26).
	* arch/arm/include/kinetis and arch/arm/src/kinetis: Basic support
	  for the Kinetis K20 architecture.  Taken from PX4.  This is the
	  work of Jakob Odersky (2015-05-26).
	* net/: Move some ICMP event lists to the device structure.  That
	  allows for both device-specific event processing and also devices
	  to generate events like network down.  From Max Neklyudov (2015-05-27).
	* net/: Extend Macs logic to ARP and ICMPv6.  Also found and fix
	  several IPv6-related compilation errors that have crept in.  IPv6
	  has been broken for awhile (2015-05-27).
	* net/tcp:  Fix an important TCP networking bug: 16-bit flags was
	  being converted to 8-bits in a few locations, causing loss of
	  status indications (2015-05-27).
	* net/socket and net/tcp: net_startmonitor.c always returned OK.  In
	  the case where a socket has already been closed, it correctly handled
	  the disconnection event but still returned OK.  Returning OK caused
	  the callers of net_startmonitor to assume that the connection was
	  okay, undoing the good things that net_startmonitor did and causing
	  the socket to be marked as connected.  This behavior was noted by
	  Pelle Windestam (2015-05-28).
	* include/nuttx/net, net/arp, net/devif, net/icmp, net/icmpv6,
	  net/netdev, net/pkt, net/tcp, net/udp: Modify event list handling:
	  Now there are two event lists each device structure:  (1) One is
	  for ARP and ICMP data related events, the other is for device
	  related events.  Callback allocation/free routines no accept a
	  device parameter as well as a list: If the device parameter is
	  added, then the callback goes into both the connection-related
	  list AND the device event list.  Thus each socket type can
	  received both custom data-related events as well as common
	  device related events (2015-05-28).
	* net/socket and net/utils: setsockopt() fails when setting timeouts
	  to values less that an 100 msec.  That is because the timeout is
	  limited to stops of 1 decisecond and because the conversion of
	  structure timeval was truncating the microsecond remainder.  The
	  utility net_timeval2dsec now accepts and option to determine how it
	  handles the remainder:  truncate, discarding the remainder, use the
	  remainder to round to the closed decisecond value, or use any non-zero
	  remainder to the next larger whole decisecond value.  Bug discovered
	  by Librae (2015-05-29).
	* configs/stm32f4discovery/src: Move up_cxxinitialize from
	  nuttx/configs/stm32f4discovery/src to apps/platform/stm32f4discovery
	  where it belongs (2015-05-29).
	* net/sockets, net/tcp, net/udp: UDP Networking: Add support for
	  device event notification for UDP transfers (2015-05-29).
	* net/sockets and net/tcp: TCP Networking: Add support for device event
	  notification for UDP transfers (2015-05-30).
	* libc/Kconfig and stdio/lib_libvsprintf.c: Add an option to disable
	  support for long long formats in lib_vsprintf.  From Alan Carvalho
	  de Assis (2015-05-30).
	* net/net_initialize.c, net/detdev, and net/socket: The network device
	  list was protected by a re-entrant semaphore.  With the recent change
	  to support network device callback, the network stack needs to access
	  the network device list too. Some drivers, however, run the network
	  stack from the interrupt level -- this is bad but a fact in the
	  current state.  Of course, those drivers are unable to take the
	  semaphore and would assert.
	  The solution here is to eliminate the device devices semaphore
	  altogether.  This eliminates netdev_semtake() and netdev_semgive()
	  and replace them with net_lock() and net_unlock() which have the
	  larger scope that is needed and will integrate properly with the
	  dinosaur interrupt driven stack (2015-05-31).
	* net/socket/connect.c: In the TCP connection operation, it was trying
	  to setup the network monitor BEFORE the socket was successfully
	  connected.  This, of course, has ALWAYS failed because the socket is
	  not yet connected and the TCP state is not yet correct for a connected
	  socket.  However, because of other changes net_startmonitor() now
	  returns a failure condition that causes worse problems when trying to
	  connect.  The fix is to move the logic that starts the network monitor
	  to AFTER the socket has been successfully connected (2015-05-31).
	* tools/configure.c: Fix test for the existence of the apps/ directory.
	  Fix backward interpretation of options, -l was selecting Windows and
	  -w was selecting Linux. This was SourceForege Ticket #39 (2015-05-31).
	* arch/include/stm32/chip.h and arch/src/stm32/Kconfig: Add basic
	  support for the STM32F205RG.  From SourceForge Ticket 40 (anonymous,
	  2015-05-31).
	* arch/arm/src/lpc17xx: Review, update, and modify the Ethernet driver
	  so that it works better with CONFIG_NET_NOINTS=y (2015-06-01).
	* configs/: Update all LPC17xx networking configurations so that they
	  have CONFIG_NET_NOTINTS=y selected (2015-06-01).
	* /arch/arm/src/armv7-m, binfmt/libelf, configs/stm32f4discovery/scripts,
	  /include/nuttx/binfmt, and libxx: Add support uClibc++ exceptions.  This
	  involves additional handling for relative relation types, additional
	  support for unwinding, as well as additional changes.  The culmination
	  of a big effort from Leo Aloe3132 (2015-06-01).
	* configs/olimex-lpc1766stk: Rename the thttpd configuration to thttpd-nxflat.
	  Add a new configuration, thttpd-binfs, that provides an example of how
	  to build apps/netutils/thttpd using binfs instead NXFLAT+ROMFS
	  (2015-06-02).
	* tools/cfgdefine.c: Extend the mkconfig tool so that it can dequote a
	  quoted list of quoted strings.  THTTPD uses such a configuration
	  setting to provide the list of index files (2015-06-02).
	* mq_timedreceive(): move the location where the errno value is set; the
	  ETIMEDOUT errno setting was being overwritten by subsequent actions
	  before returning.  Noted by Freddie Chopin (2015-06-03).
	* Networking:  Modify how callback structures are stored to avoid
	  another potential use of a stale pointer (2015-06-03).
	* POSIX message queues:  Move mq_setattr() and mq_getattr() from
	  nuttx/libc/mqueue to nuttx/sched/mqueue.  Also add syscall support
	  for mq_setattr() and mq_getattr().  This is necessary in protected and
	  kernel builds because in those cases the message queue structure is
	  protected and cannot be accessed directly from user mode code (2015-06-03).
	* drivers/net/tun.c: TUN driver bug fix.  From Max Neklyudov (2015-06-03.
	* drivers/net/Kconfig, include/nuttx/net/mii.h, and
	  arch/arm/src/lpc17xx/lpc17_ethernet.c: Add support for the Micrel
	  KSZ8041 PHY to the LPC17xx Ethernet driver (2015-06-03).
	* configs/lincoln60/netnsh:  Add a network enabled configuration for
	  the Lincoln60 board (2015-06-03).
	* drivers/net/tun.c: Misc. improvements to the TUN driver, mostly related
	  to poll().  From Max Neklyudov (2015-06-04).
	* fs/, fs/unionfs, include/nuttx, include/sys, Documentation: Add
	  support for a union file system that can be used to overlay and merge
	  the content of two mounted file systems (2015-06-05).
	* arch/arm/src/efm32/efm32_spi.c: Add SPI GPIO pin initialization.  From
	  Pierre-noel Bouteville (2015-06-05).
	* configs/sim/unionfs:  Add a configuration for testing the Union File
	  System (2015-06-05).
	* configs/lincoln60/thttpd-binfs: Add a thttpd-binfs configuration for
	  the Lincoln60.  That configuration still does not work on initial
	  commit (2015-06-06).
	* arch/arm/src/sama5/sam_can.c: Fix SAMA5 CAN frame construction.  From
	  Max Holtzberg (2015-06-07).

7.11 2015-08-13 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/efm32/efm32_spi.c: Correct write to incorrect register in
	  EFM32 SPI driver.  From Pierre-noel Bouteville (2015-06-09).
	* configs/teensy-3.x:  Add board support for the PJRC Teensy-3.1 board
	  (2015-06-09).
	* arch/arm/src/samdl, configs/samd20-xplained, and configs/saml21-xplained:
	  In the SAML21, SERCOM5 uses a different SLOW clock channel (and, hence,
	  also a different SLOW GCLK generator).  This means that the channel
	  selection cannot be a global definition but must be a per SERCOM
	  configuration setting (2015-06-10).
	* arch/arm/src/kinetis and include/kinetis: Add support for MK20DN--VLH5
	  and MK20DX---VLH5.  Needed for backward compatible support for
	  Teensy-3.0 (2015-06-10).
	* configs/Kconfig and configs/teensy-3.x:  Add support for Teensy-3.0
	  (2015-06-10).
	* arch/arm/src/stm32/stm32l15xxx_rcc.c: STM322 F15x stm32_stdclockconfig()
	  was calling stm32_pw_setvos() which accessed PWR_CR via an inactive APB
	  From Juha Niskaneni (2015-06-11).
	* fs/mount: Add the ability to mount a file system on top of en existing
	  node in the pseudo-file system (2015-06-11).
	* arch/arm/src/sam34/sam_clockconfig.c: Add default loop optimization if
	  EEFC_FMR is available in the configuration (i.e., for SAM4S and 4E).
	  From Marco Aurélio da Cruz (2015-06-11).
	* include/time.h and libc/time: Add asctime(), asctime_r(), ctime(), and
	  ctime_r() (2015-06-12).
	* include/ and arch/: Clean up and review of header files for conformance
	  to standards (2015-06-12).
	* arch/arm/src/samdl: Add build framework for SAML21 DMA support.
	  Nothing there yet except for skeletal logic taken from SAM3/4
	  (2015-06-12).
	* include/pthread.h and nuttx/sched/pthread: Use -1 instead of 0 as PID
	  for unclaimed mutexes.  From Juha Niskanen (2015-06-16).
	* sched/pthread: Implement pthread_mutex_trylock() for recursive mutexes.
	  From Juha Niskanen (2015-06-16).
	* libc/unistd/lib_getopt.c:  Uninitialized variable can cause hardfault
	  from getopt if required argument is missing. From George McWilliams
	  (2015-06-18)
	* arch/arm/include/samdl and arch/arm/src/samdl:  Add architecture support
	  for the SAMD21 family (2015-06-19).
	* configs/samd21-xplained:  Board configuration for the SAMD21 Xplained
	  board (2015-06-21).
	* arch/arm/src/sam34/sam_lowputc.c: Back out an error introduced with
	  commit 02c33f66c5a8be774034cd40e4125e9323c7b4d8.  Causes an infinite
	  loop in up_lowputc().  From Max Neklyudov (2015-06-22).
	* arch/arm/src/samv7/sam_lowput.c: Also back the bad change to sam_lowputc.c
	  for SAMV7 platform (2015-06-22).
	* include/nuttx/fs/ioctl.h and power/relay.h: Add relay IOCTL definitions.
	  From Max Neklyudov (2015-06-22).
	* sched/clock/clock_gettime.c: Use up_timer_gettime for CLOCK_MONOTONIC
	  in tickless mode.  From  Max Neklyudov (2015-06-22).
	* crypto/ and SAM4CM: Add CFB and MAC AES modes.  From Max Neklyudov
	  (2015-06-22).
	* SAM4CM: Fix SUPC register definitions. From Max Neklyudov.  Also
	  removed conditional logic form non-SAM4CM parts (Gregory Nutt)
	  (2015-06-22).
	* SAM3/4:  Add a TWI driver for the SAM4CM.  From  Max Neklyudov
	  (2015-06-22).
	* SAMV7 Xplained: In clock configuration, divider was set to 25 to get
	  25*12MHz=300MHz CPU clock.  The correct multiplier is 24 because the
	  calculation if (24+1)*12MHz.  So the board was running at 312MHz.
	  From Efim Monjak (2015-06-26).
	* NFS client: Fix prototype of unbind method.  The function prototype
	  was not updated for NFS after a recent change to the file system
	  interface.  From Manuel Stühn (2015-06-25).
	* Broke the NuttX GIT repository into several, smaller repositories.
	  Eliminated the misc/ directory and the content under misc/Obsoleted
	  and misc/sims (2015-06-27).
	* Removed the Documentation/ directory.  Replaced with a GIT submodule
	  that will bring in the new standalone Documentation directory
	  (2015-06-29).
	* Removed the configs/ directory.  Replaced with a GIT submodule
	  that will bring in the new standalone boards directory (2015-06-29).
	* arch/arm/src/armv6-m/up_exception.S: Fix Cortex-M0 assembly error
	  when the interrupt stack is enabled.  From Alan Carvalho de Assis
	  (2015-06-30).
	* arch/arm/src/armv6-m/up_assert.c: Port some per-process stack
	  dumping logic from ARMv7-M to ARMv6-M.  From Alan Carvalho de Assis
	  (2015-06-30).
	* tools/testbuild.sh:  Add a script that can be used to perform
	  building testing for several board configurations (2015-06-30).
	* sched/pthread/pthread_create.c:  Group binding needs to be cleared
	  before sched_releasetcb(), as otherwise group_leave() will be called
	  and group->tg_nmembers decremented or group being released.
	  group_leave() should be called only after group_join() is called,
	  not after group_bind().  From Jussi Kivilinna (2015-07-01).
	* arch/arm/src/sama5/sam_ehci.c:  Fix some bad conditional compilation
	  that left a function undefined if CONFIG_USBHOST_ASYNCH is not
	  selected (2015-07-01).
	* arch/arm/src/common/up_vfork.c:  Fix a Cortex-A compilation error
	  when system calls are enabled in modes other than CONFIG_BUILD_KERNEL
	  (2015-07-01)
	* include/nuttx/net/netconfig.h:  Fix some backward compilation that was
	  emitting #error in the wrong condition when SLIP was enabled (2015-07-01).
	* drivers/net/slip.c:  Fix a missed name change when many of network
	  interface names changed sometime back but were apparently never updated
	  for SLIP (2015-07-01).
	* drivers/input/stmpe811_base.c:  In stmpe811_instanciate() when
	  CONFIG_STMPE811_MULTIPLE is enabled, and the call to stmpe811_checkid()
	  fails, then the linked device list is not restored to its previous state.
	  From Sebastien Lorquet (2015-07-02).
	* sched/sched/sched_waitpid.c: Implement WNOHANG for waitpid() only and
	  for the case of CONFIG_SCHED_HAVE_PARENT not selected.  From Max
	  Neklyudov (2015-07-02).
	* arch/sim/src/up_head.S: Implement board_power_off() for the simulation
	  platform (2015-07-04).
	* libc/unistd/lib_gethostname.c: Add support for sethostname() (2015-07-05).
	* libc/net:  Add support for gethostbyname() and gethostbyaddr().  Also
	  support included for the non-standard gethostbyname_r() and
	  gethostbyaddr_r() (2015-07-08).
	* drivers/ioexpander and include/nuttx/ioexpander: This commit adds:
	  - headers in nuttx/ioexpander to define the "generic" ioexpander
	    framework
	  - files in drivers/ioexpander for the implementation of the NXP
	    PCA9555 framework
	  - bindings in drivers/Kconfig and drivers/Makefile
	  From Sebastien Lorquet
	* arch/arm/src/lpc43xx/chip/lpc4310203050_pinconfig.h: Correct some
	  LPC4350 GPIO pin configurations.  From Alessandro Temil (2015-07-09).
	* mm/umm_heap, include/nuttx/kmalloc.h, userspace.h, mm/mm.h, and all
	  configurations that support protected mode:  Redesigned how the user
	  space heap is accessed from the kernel code in protected mode.  It
	  used to call memory management functions in user space via function
	  pointers in the userspace interface.  That is inefficient because the
	  first thing that those memory management functions do is to trap back
	  into the kernel to get the current PID.  Worse, that operation can be
	  fatal is certain fragile situations such as when a task is exiting.
	  The solution is to remove all of the memory management function calls
	  from the interface.  Instead, the interface exports the users pace
	  heap structure and then kernel size implementations of those memory
	  management functions will operate on the userspace heap structure.
	  This avoids the unnecessary system calls and, more importantly,
	  failures do to freeing memory when a test exits (2015-07-10).
	* libc/netdb:  Move netdb functions from lib/net to lib/netdb.  Move
	  the DNS client logic from apps/netutils/dnscient to libc/netdb.
	  Add support to gethostbyname() so that it will attempt a DNS host
	  lookup before consulting the host table (if so enabled) (2015-07-10).
	* arch/arm/src/samdl/chip/saml_usb.h:  Several fixes to register
	  definitions and types. From Janne Rosberg (2015-07-10).
	* include/nuttx/net/ and libc/netdb: Repartitioning of DNS client
	  logic in preparation for IPv6 support (2015-07-12):
	  - Rename include/nuttx/net/dnsclient.h to dns.h
	  - Move internal DNS prototypes from dns.h to libc/netdb/lib_dns.h
	  - Global standard DNS definitions from libc/netdb/dns_soccket.c to
	    dns.h
	  - Eliminate dns_gethostip().  This is now an internal part of
	    gethostbyname()
	  - Eliminate interface dns_whois().  Not needed in this new context.
	* include/nuttx/net/ and libc/netdb: Modifications to DNS client logic
	  and to dns_get/setserver() interfaces to support DNS clients at IPv6
	  addresses (still no support for resolution to IPv6 addresses)
	  (2015-07-12).
	* include/nuttx/net/ and libc/netdb: Implement the low-level network DNS
	  packet protocol to request and receive IPv6 address mappings
	  (2015-07-12).
	* libc/netdb:  Add a default value for DNS server IP address.  Make
	  sure that the IP address has been initialized before permitting DNS
	  queries (2015-07-13).
	* libc/netdb:  Add support for a DNS host name resolution cache.  This
	  can save a lot of DNS name server lookups (but might also have the
	  negative consequence of using stale IP address mappings (2015-07-13).
	* graphics/, libnx/, and include/nuttx/nx:  Implement anti-aliasing in
	  order to clean the drawing of all edges (2015-07-14).
	* drivers/lcd/ and include/nuttx/lcd: Modify the SSD1306 LCD driver to
	  support either the SPI or I2C interface.  From Alan Carvalho de Assis
	  (2015-07-15).
	* arch/src/stm32f7 and arch/include/stm32f7:  Add architecture support
	  for the STMicro STM32 F7 (2015-07-15).
	* drivers/can.c:  Fix an issue in the CAN driver where the rx_sem
	  count can grow beyond bounds (2015-07-15).
	* configs/stm32f762g-disco/:  Add initialize support for the STMicro
	  STM32 F7 Discovery board.  This is a work in progress and will be a
	  while before it is fully functional (2015-07-16).
	* arch/../up_etherstub.c, arch/../up_initialize, and other files: Add
	  CONFIG_NETDEV_LATEINIT that can be used to suppress calls to
	  up_netinitialize() from early in initialization (2015-07-17).
	* arch/arm/src/stm32: Extend STM32 Ethernet operating frequency to
	  180MHz.  From Sebastien Lorquet (2015-07-17).
	* STM32 F7 Discovery:  Basic NSH configuration is functional with a
	  serial console.  I-/D-Caches and DTCM have been enabled.  The delay
	  loop has been calibrated -- very fast (2015-07-19).
	* drivers/sensor and include/nuttx/sensors: Add support to Bosch BMP180
	  barometer.  From Alan Carvalho de Assis (2015-07-20).
	* configs/stm32f4discovery/: Add support to BMP180 driver on the
	  STM32F4Discovery.  From Alan Carvalho de Assis (2015-07-20).
	* arch/arm/src/stm32f7:  Add an STM32 F7 Ethernet driver (2015-07-20).
	* arch/arm/src/stm32f7:  Port the STM32 F4 DMA driver.  Untested on
	  initial commit (2015-07-20).
	* arch/arm/src/sam34: Correct some problems with SAM3/4 watchdog driver.
	  Includes some small improvements.  From Max Neklyudov (2015-07-21).
	* arch/arm/src/stm32 and include/stm32:  Add support for the STMicro
	  STM32 F446.  From David Sidrane (2015-07-22).
	* include/nuttx/sched.h, sched/, and fs/procfs:  Increase the size of
	  the scheduling policy field from 1 to 2 bits to allow additional,
	  planned scheduling policies (2015-07-23).
	* pthread_create: Fix an (unlikely) error in fallback value in the
	  event of a failure (which should never occur) (2015-07-23).
	* include/, sched/, and libc/: Add support for sporadic scheduling
	  parameters in struct sched_param, posix_spawnattr_t, and pthread_attr_t.
	  Update all user interfaces to pass sporadic scheduling parameters.
	  (2015-07-23).
	* sched/: Separate the round-robin logic into a separate file so that
	  it is symmetric with the sporadic stuff.  Integrate the sporadic
	  scheduler into the time tick interrupt handling and into the tickless
	  operation (2015-07-24).
	* arch/arm/src/moxart/: Add support for MoxaRT SoC found in the most
	  Moxa serial converters such as NP51x0, NP66xx, UC72xx.  From Anton
	  D. Kachalov (2015-07-29).
	* configs/moxa: Moxa NP51x0 series of 2-port advanced RS-232/422/485
	  serial device servers.  From Anton D. Kachalov (2015-07-29).
	* drivers/net/ and include/nuttx/net: Add support for a Faraday
	* FTMAC100 Ethernet MAC Driver.  From Anton D. Kachalov (2015-07-29).
	* 16550 UART Driver: Add a configuration option to indicate the
	  THR empty bit is inverted.  This is the case for the moxART SoC.
	  Based comments from Anton D. Kachalov (2015-07-29).
	* STM32 F4:  Add DMA support to the ADC driver for STM32 F4.  From
	  Max Kriegler (2015-07-30).
	* sem_tickwait():  Added this function for internal use within the
	  OS.  It is a non-standard but more efficient version of sem_timedwait()
	  for use in higher performance device drivers (2015-08-01).
	* drivers/net/slip.c:  Fix another compilation error (2015-08-02).
	* drivers/can.c include/nuttx/can.h, and fs/fs.h:  Add CAN IOCTL command
	  definitions to manage CAN message filtering (2015-08-05)
	* drivers/Kconfig and can.c:  Add configuration to support DLC to byte
	  conversions needed for CAN FD mode (2015-08-05).
	* arch/arm/src/samv7:  Add an MCAN driver for the SAMV7 platform
	  (2015-08-06).
	* drivers/sensors/lm92.c and include/nuttx/sensors/lm92.h:  Add a driver
	  for the LM92 temperature sensor.  Contributed by Paul Alexander Patience
	  (2015-08-06).
	* drivers/sensors/as5048b.c and include/nuttx/sensors/as5048b.h: Add
	  support for an AS5048B rotary magnetic sensor.  From Paul Alexander
	  Patience (2015-08-07).
	* include/nuttx/spi/slave.h:  Add a definition of an SPI slave
	  interface (2015-08-08).
	* arch/arm/src/samv7: Add the framework for an SPI slave driver.  This
	  driver has a lot of missing logic on initial commit (2015-08-09).
	* arch/arm/src/samv7: Basic, no-DMA SPI slave driver is in place
	  (2015-08-10).
	* fs/vfs/epoll.c and include/sys/epoll.h: Add a very simple epoll layer
	  just around poll calls. To satisfy build app requirements.  From Anton
	  D. Kachalov (2015-08-10).
	* drivers/mtd/ramtron.c:  Update to include supportf for newer
	  RAMTRON parts.  From David Sidrane (2015-08-10).
	* Networking:  Allow receipt of empty UDP packets.  From Max Neklyudov
	  (2015-08-11).
	* drivers/sensors/mb7040.c and include/nuttx/sensors/mb7040.h: Add
	  support for a MB7040 sonar driver.  From Paul Alexander Patience
	  (2015-08-11).
	* net/udp:  Add support for send() for connected UDP sockets
	  (2015-08-11).
	* drivers/sensors/ms5805.c and include/nuttx/sensors/ms5805.h: Add
	  support for an MS5805 altimeter.  From Paul Alexander Patience
	  (2015-08-12).

7.12 2015-10-01 Gregory Nutt <gnutt@nuttx.org>

	* fs/vfs/fs_poll.c:  Use sem_tickwait() instead of sem_timedwait()
	  From Macs Neklyudov (2015-08-13).
	* fs/vfs/fs_poll.c:  If we fail to setup the poll for any file
	  descriptor, for any reason, set the POLLERR bit (2015-08-13).
	* libc/stdlib: Add support for div() to the C library.  From
	  OrbitalFox (2015-08-14).
	* libc/stdlib:  Might as well add ldiv() and lldiv() to since
	  these are equivalent to div() with long and long long types,
	  respectively, instead of int (2015-08-14).
	* include/signal.h and files that include it:  Add si_errno to
	  siginfo_t (2015-08-14).
	* drivers/sensors/mx58xx.c and include/nuttx/sensors/ms58xx.h:
	  Generalize the MS5805 altimeter driver to support other family
	  members and rename to ms58xx. From Paul Alexander Patience
	  (2015-08-14).
	* Network drivers. Fix bug in tun interface driver.  From Max
	  Neklyudov (2015-08-17).
	* STM32:  Added definitions for STM32F303K6, STM32F303K8, STM32F303C6,
	  STM32F303C8, STM32F303RD, and STM32F303RE devices.  From Paul
	  Alexander Patience (2015-08-17).
	* include/nuttx/can.h and all CAN drivers: Add an error indication
	  bit to the CAN message report.  This indication must then be cleared
	  in all existing drivers.  More to come (2015-08-18).
	* arch/arm/src/lpc17/lpc17_irq.c: Set NVIC vector address so that
	  code can execute with a bootloader or can execute from RAM.  From
	  Pavel Pisa (2015-08-20).
	* All ARMV7-M IRQ setup:  Always set the NVIC vector table address
	  unconditionally.  This is needed in cases where the code is running
	  with a bootload and when the code is running from RAM.  It is also
	  needed by the logic of up_ramvec_initialize() which gets the vector
	  base address from the NVIC.  Suggested by Pavel Pisa (2015-08-21).
	* SAMV7 USBHS DCD: The device controller driver is (finally) functional
	  (2015-08-21).
	* recvfrom(): Correct wait for new data when NET_UDP_READAHEAD is
	  enabled.  Fix size accounting when recvfrom_udpreadahead() sets
	  state.rf_recvlen == -1.  I have not checked if data are accumulated
	  to the right position in the buffer however. From Pavel Pisa
	  (2015-08-21).
	* sched/wdog/wd_create.c:  Correct a counting error in the number
	  of available watchdog timers.  When the number of free timers is
	  low, the counter could be incremented below zero (2015-08-21).
	* arch/arm/src/stm32: Add OTG support for STM32F44x.  From David
	  Sidrane (2015-08-21).
	* arch/arm/src/lpc17: Actually implement options to use external
	  SDRAM and or SRAM for the heap.  From Pavel Pisa (2015-08-21).
	* gethostbyname(): correct returned address format when DNS is used.
	  The hostent.h_addr_list should point to raw in_addr or in6_addr
	  as defined in the standard. Original implementation used that
	  for numeric addresses but for DNS lookup returned pointer to
	  whole sockaddr_in or sockaddr_in6.  From Pavel Pisa  (2015-08-21).
	* tools/mksymtab: declare g_symtab array as const to occupy RO
	  section (Flash).  From Pavel Pisa (2015-08-23).
	* libc/libc.csv and syscalls/syscalls.csv:  Define some symbol
	  export conditions, correct errno and add sleep and usleep. From
	  Pavel Pisa (2015-08-23).
	* net/ and include/nuttx/net:  Remove references to PPP as a
	  link layer protocol (2015-08-24).
	* net/, drivers/net, and include/net:  Add definitions to support
	  a local loopback device and link layer (2015-08-24).
	* libc/netdb, net/loopback, include/nuttx/net:  Add NetDB support
	  for the local loopback device (2015-08-24).
	* drivers/net/loopback.c:  Add basic prototype of a local loopback
	  device (2015-08-24).
	* networking:  Correct return value from psock_tcp_accept().  From
	  SaeHie Park (2015-08-25).
	* drivers/mtd/s25fl1.c: Add a driver for ST25L1*K QuadSPI parts
	  (2015-08-25).
	* include/nuttx/spi/qspi.h:  Develop a new interface for QSPI, at
	  least the way that QSPI is implemented on the SAMV71.  Originally
	  planned to use the SPI interface, but it is just now compatible
	  with the SAMV71 QSPI hardware (2015-08-25).
	* drivers/rwbuffer.c: Fix some logic errors.  From Dmitry Nikolaev
	  via Juha Niskanen (2015-08-26).
	* net/socket and net/tcp: Fix a problem in when there are multiple
	  network devices.  Polls were being sent to all TCP sockets before.
	  This is not good because it means that packets may sometimes be
	  sent out on the wrong device.  That is inefficient because it
	  will cause retransmissions and bad performance.  But, worse, when
	  one of the devices is not Ethernet, it will have a different MSS
	  and, as a result, incorrect data transfers can cause crashes.
	  The fix is to lock into a single device once the MSS is locked
	  locked down (2015-08-27).
	* drivers/lcd and include/nuttx/lcd:  Add SSD1351 OLED controller
	  support.  Contributed by Paul Alexander Patience (2015-08-28).
	* include/nuttx/mtd/mtd.h:  Move MTD ioctl command definitions from
	  include/nuttx/fs/fs.h to include/nuttx/mtd.h.  Add ioctl commands
	  to protect and unprotect memory (2015-08-29).
	* binfmt/builtin.c:  Fix a memory leak: File was not being closed.
	  From Bruno Herrera (2015-08-30).
	* fs/romfs: One allocation was not being freed if there was a
	  subsequent failure to allocation I/O buffers resulting in a memory
	  leak on certain error conditions.  From Bruno Herrera (2015-08-30).
	* arch/arm/src/up_internal.h and several ARM Make.defs files:  In the
	  original implementation, !defined(CONFIG_ARMV7M_CMNVECTOR) was a
	  sufficient test to determine if lazy floating point register saving
	  was being used.  But recents changes added common lazy register as
	  well so now that test must be (!defined(CONFIG_ARMV7M_CMNVECTOR) ||
	  defined(CONFIG_ARMV7M_LAZYFPU)) (2015-08-31).
	* arch/arm/include/sama5 and src/sama5:  Add basic chip description,
	  configuration support and interrupt definitions for the SAMA5D2
	  (2015-08-31).
	* LPC43xx: Fix NVIC_SYSH_PRIORITY_STEP define.  From Ilya Averyanov
	  (2015-09-01).
	* LPC43xx: Fix missing #define in eeprom.  From Ilya Averyanov
	  (2015-09-01).
	* libc/math/lib_asin.c: The function did not convert for some input
	  values.  Asin did not convert for values which do not belong to the
	  domain of the function. But aside of that the function also did not
	  converge for some allowed values.  I achieved a conversion of the
	  function by reducing the DBL_EPSION and by checking if the input
	  value is in the domain of the function. This is a fix for the
	  problem but the function should always terminate after a given
	  number of iterations.  From Stefan Kolb (2015-09-01).
	* arch/arm/src/lpc43xx/lpc43_spi.c: Fix SPI driver.  From Ilya
	  Averyanov (2015-09-02).
	* arch/arm/src/lpc43xx/lpc43_ethernet.c: Add Ethernet support.  From
	  Ilya Averyanov (2015-09-02).
	* net/tcp:  The logic that binds a specific network device to
	  a connection was faulty for the case of multiple network
	  devices.  On bind(), the local address should be used to associate
	  a device with the connection (if the local address is not INADDR_ANY);
	  On connect(), the remote address should be used (in case the local
	  address is INADDR_ANY).  On accept(), it does not matter but the
	  remote address is the one guaranteed to be available (2015-09-02).
	* configs/Board.mk and configs/*/src/Makefile: Simplify configs/
	  Makefiles by combining common logic into a new Board.mk Makefile
	  fragment.  From Paul Alexander Patience (2015-09-04).
	* configs/sama5d2-xult: Add a very basic configuration for the SAMAD2
	  Xplained Ultra board.  This configuration is incomplete and only
	  intended to support the initial board bring-up (2015-09-05).
	* up_initialize() all architectures:  Automatically initialize all
	  the TUN device if it is in the configuration (2015-09-06).
	* Change all references from avsprintf to vasprintf.  From Sebastien
	  Lorquet (2015-09-07).
	* net/tcp: Fix unbuffered send compilation error when Ethernet is not
	  enabled.  From Alan Cavalho de Assis (2015-09-07).
	* LPC31 and SAMA5D EHCI: Fix qh_ioccheck to move bp to next QH.  From
	  Ilya Averyanov (2015-09-07).
	* LPC31 and SAMA5D EHCI:  Performance improvement:  Do not disable the
	  asynchronous queue when adding a new QH structure.  From  Ilya
	  Averyanov (2015-09-07).
	* arch/arm/src/sama5: Separate memory mapping tables for SAMA5D2, 3,
	  and 4 (2015-09-08).
	* libc/net/lib_shutdown.c:  Add an empty implementation of the
	  standard shutdown function.  This provides only the framework for
	  the shutdown function; the internal logic is not included
	  (2015-09-09).
	* configs/nucleo-f303re: Support for the STMicro Nucleo F303RE board
	  from Paul Alexander Patience (2015-09-10).
	* arch/arm/src/lpc43xx/lpc43_ehci.c and .h:  LPC43xx EHCI driver from
	  Ilya Averyanov (2015-09-10).
	* ARMv7-M, all "lazy" interrupt stack logic.  Assembly instruction
	  that fetches the saved value is incorrect; replace with more
	  traditional push and pop.  This is an important fix.  Noted by
	  Stefan Kolb (2015-09-14).
	* All ARMV7-M: Force 8-byte stack alignment when calling from assembly
	  to C to interrupt handling (2015-09-15).
	* drivers/power/battery_gauge.c and include/nuttx/power/battery_gauge.h:
	  battery.c/h renamed to batter_gauge.c/.h since it really only
	  implements a battery fuel gauge.  From Alan Carvalho de Assis (2015-09-19).
	* drivers/power/battery_charger.c and include/nuttx/power/batter_charger.h:
	  Add a new framework to support a batter charger interface.  From Alan
	  Carvalho de Assis (2015-09-19).
	* drivers/power/bq2425x.c and .h: Battery Charger: Add BQ24250 driver.
	  From Alan Carvalho de Assis (2015-09-20).
	* fs/mqueue/mq_open.c: When message queue is opened, inode_reserve()
	  leaves the reference count at zero.  mq_open() logic must assure
	  that the reference count of the newly created inode is one (2015-09-23).
	* arch/sim/src/Kconfig, Makefile, up_setjmp64.S:  Modern Cygwin X86_64
	  machines follow the Microsoft ABI for parameter passing.  The older,
	  Linux System 5 ABI will not work on X86_64-based Cygwin machines.  Also,
	  the newer Cygwin tool chains do nor pre-pend symbol names with the
	  underscore character.  With these changes the simulator agains works
	  with the newer Cygwin64 platform (2015-09-24).
	* arch/arm/src/lpc43xx: Extensive I2C and clocking updates from Lok Tep
	  (2015-09-29).
	* configs/lpc4370-link2: Support for the NXP LPC4370-Link2 development
	  board from Lok Tep  (2015-09-29).
	* configs/nucleo-f303re: Add SSD1351 SPI 4-wire interface.  From Paul
	  Alexander Patience (2015-09-29).
	* arch/arm/src/armv7-m/up_schedulesigaction.c: Fix logic that determines
	  if there is a pending signal action before scheduling the next signal
	  action.  Both the test and the scheduling action need to be atomic
	  (2015-09-30).
	* sched/wqueue/kwork_queue.c and libc/wqueue/work_queue.c: Logic that
	  sets the queued indication and the logic that does the actual queuing
	  must be atomic (2015-09-20).

7.13 2015-12-05 Gregory Nutt <gnutt@nuttx.org>

	* libc/stdlib/lib_bsearch.c and include/stdlib.h:  Add the bsearch()
	  function from NetBSD (2015-10-02).
	* libc/stdlib/lib_qsort.c and include/stdlib.h:  Make coding style
	  more conformant, take description from OpenGroup.org, rename formal
	  parameters to match names used on OpenGroup.org (2015-10-02).
	* drivers/lcd/st7565.c:  Extend to include support for the ERC12864-3.
	  From  Pierre-noel Bouteville (2015-10-07).
	* fs/tmpfs:  Created a directory that will eventually hold a trivial
	  temporary RAM file file system (2015-10-0i8).
	* tools/: Add crappy style checking tool nxstyle.c.  See thee tools/
	  README file for more info (2015-10-08).
	* stm32 F4:  Fix some TIM12 pin mappings.  From Max Kriegleder
	  (2015-10-9).
	* fs/tmpfs: TMPFS file system is code complete and bascially functional
	  although it has not been heavily tested (2015-10-9).
	* drivers/input/button_upper.c and include/nuttx/input/buttons.h:  Add a
	  driver to support application access to board buttons (2015-10-12).
	* drivers/input/button_lower.c:  Add a generic lower half button driver.
	  This lower half driver is only usable in a limited number of
	  situations, but can still serve as a module for the lower half button
	  driver.  (2015-10-13).
	* drivers/sensors/zerocross.c and include/nuttx/sensors/zerocross.h:
	  Add Zero Cross device driver support.  From Alan Carvalho de Assis
	  (2015-10-13).
	* configs/stm32f4discovery/src/stm32_zerocross.c: Add low level support
	  for the Zero Cross driver for the STM32F4-Discovery.  From Alan
	  Carvalho de Assis (2015-10-13).
	* drivers/sensors/max6675.c and include/nuttx/sensors/max6675.h:  Add
	  support to Thermocouple-to-Digital converter MAX6675.  From Alan
	  Carvalho de Assis (2015-10-18).
	* configs/stm32f4discovery/src: Add board config to support MAX6675.
	  From Alan Carvalho de Assis (2015-10-18).
	* arch/arm/src/samv7/sam_lowputc.c: Reconfigure System I/O when using
	  USART1.  From Frank Benkert (2015-10-20).
	* fs/semaphore: Named semaphores:  Bad cast in sem_close().  Fixed by
	  reordering fields of struct nsem_inode_s so that the cast will work
	  (2015-10-22).
	* Many files: Rename board_led_* functions to board_autoled_* functions.
	  This makes room in the namespace to handler user LED functions
	  (2015-11-01).
	* Many files: Standardize naming of the user LED interface functions.
	  The new user LED interface functions are now prototyped in only in
	  include/nuttx/board.h and have name like board_userled_* (2015-11-01).
	* drivers/leds/usersled_upper.c and include/leds/usersled.h:  Add
	  a generic character driver that may be used by applications to write
	  to board LEDs (2015-11-01).
	* drivers/leds/usersled_lower.c:  Add a generic lower-half user LED
	  driver that may be used by any board that supports the standard
	  board user LED interfaces (2015-11-01).
	* sched/clock: Fix error in clock_timespec_subtract().  Found by Lok
	  (2015-11-03).
	* drivers/can.c and include/nuttx/can.h:  Fix a problem in the CAN
	  upper-half driver that occurs only for CAN hardware that support a
	  H/W FIFO of outgoing CAN messages.  In this case, there can be a
	  hang condition if both the H/W and S/W FIFOs are both full.  In that
	  case, there may be no event to awaken the upper half driver.  Add a
	  new (conditional) CAN upper half interface called can_txready() that
	  can be used by the lower half driver to avoid this hang condition
	  (2015-11-03).
	* arch/arm/src/samv7:  Add a call to can_txready() to the MCAN driver
	  (2015-11-03).
	* arch/arm/src/samv7:  Add MPU and protected build support (2015-11-06).
	* arch/arm/src/samv7:  The QSPI FLASH driver is now functional.  This
	  driver operates in the memory-mapped, Serial Memory Mode (SMM)
	  (2015-11-07).
	* drivers/bch:  Block-to-character (BCH) driver should forward ioctl()
	  calls to the contained block driver (2015-11-09).
	* arch/arm/samv7/sam_qspi.c: The QuadSPI driver is now functional
	  (2015-11-10).
	* drivers/mtd/s25fl1.c:  The S25FL1xx QuadSPI FLASH driver is now
	  functional (2015-10-11).
	* arch/arm/samv7:  Add an on-chip FLASH driver (2015-11-12).
	* drivers/mtd/mtd_progmem.c:  Add an upper half MTD device that can
	  use the interfaces defined in included/nuttx/progmem.h to provide
	  a standard MTD interface (2015-11-12).
	* drivers/serial/serial.c, serialirq.c and include/nuttx/serial/serial.h:
	  Implement high level DMA infrastructure for serial devices.  From
	  Max Neklyudov (2015-11-12).
	* arch/arm/src/samv7 and arch/arm/include/samv7:  Add support for the
	  SAME70 family of chips (2015-11-14).
	* configs/stm32f429i-disco: configs/stm32f429i-disco/src/stm32_nsh.c
	  file calculated partition boundries based on page block sizes but
	  mtd_partition() is expecting calculations based on erase block size.
	  From Alan Carvalho de Assis (2015-11-16).
	* Move rivers/wireless/cc3000/security.c to crypto/aes.c; move
	  include/nuttx/wireless/cc3000/security.h to include/nuttx/crypto/aes.h
	  (2015-11-16).
	* drivers/mtd/at24xx.c:  Add support for multiple AT24xx EEPROM parts,
	  each with unique I2C addresses, but otherwise identical (2015-11-17).
	* drivers/timers/ds3231.c:  Add support for the DS3231 I2C RTC.  Untested
	  on the initial commit (2015-11-17).
	* arch/arm/src/stm32/stm32_tim_lowerhalf.c:  Add a compatible lower-half
	  timer driver for use with drivers/timers/timer.c.  From Wail Khemir
	  (2015-11-17).
	* drivers/sensors/ms58xx.c:  Fix some issues with initialization and with
	  CRC calculation.  From Karim Keddam (2015-11-17).
	* drivers/mtd/w25.c: Fix W25 FLASH driver page read/write logic. From
	  Ken Pettit (2015-11-18).
	* drivers/mtd/smart.c: Fix a Smart wear-leveling bug. From Ken Pettit
	  (2015-11-18).
	* arch/sim/src/up_spiflash.c:  Add support for W25 FLASH simulation.
	  From Ken Pettit (2015-11-18).
	* configs/boardctl.h, Kconfig, include/sys/boardctl.h, and nuttx/board.h:
	  Add a command to the boardctl() interface to obtain a board unique ID
	  (2015-11-18).
	* drivers/timers/ds3231.c:  Driver extended to include support for the
	  DS1307 RTC (2015-11-18).
	* configs/same70-xplained:  Add basic NSH configuration for the SAME70
	  Xplained board.  Initial commit is just the SAMV71-XULT files with
	  names changed appropriately (2015-11-18).
	* drivers/mtd/smart.c: Fixed SmartFS wear level error that occurs when
	  the logical sector size is too small to save all wear level status
	  bytes in a single sector.  Logical sectors 1 and 2 were simply not
	  being allocated and then the read_sector and write_sector routines
	  were failing.  From Ken Pettit (2015-11-18).
	* drivers/timers/ds3231.c:  Untested support for DS1302 and DS3232.
	  Also definitions for the DS3234, but that is an unsupported SPI RTC
	  (2015-11-19).
	* drivers/mtd/w25.c: Add support for byte write mode.  From Ken Pettit
	  (2015-11-20).
	* drivers/timers/pcf85263.c and include/nuttx/times/pcf85263.h:  Add
	  a driver for the NXP PCF85263 I2C RTC.  Untested on initial commit
	  (2015-11-20).
	* fs/driver/fs_blockproxy.c: Add logic to create a temporary char driver
	  using drivers/bch to mediate character oriented accessed to a block
	  driver (2015-11-21).
	* fs/vfs/open.c: If the use attempts to open a block driver, use
	  block_proxy() to insert a character driver conversion layer in front
	  of the block driver (2015-11-21).
	* libc/stdio/lib_freopen.c and include/stdio.h:  Add support for
	  freopen() (2015-11-22).
	* include/sys/types.h and include/nuttx/mm.h: When building on a 64-bit
	  machine, the size of size_t should be 64-bits. In general, I believe
	  that sizeof(size_t) should be the same as sizeof(uinptr_t).  mmsize_t
	  should always be 32-bits in any event.  The last change to stddef has
	  been backed out.  With these changes, the simulator builds without
	* fs/hostfs and arch/sim/src:  Add a special file system for use with
	  simulator that supports access to the host file system from the
	  simulation.  From Ken Pettit (2015-11-25).
	* libc/time/lib_strftime.c:  Add day-of-week support. (2015-11-25).
	* drivers/lcd/ili9432.c:  Fixed errors in orientation. Portrait,
	  RPortrait, and RLandscript should work correly now.  They were
	  displayed mirrored.  From  Marco Krahl (2015-11-25).
	* drivers/mtd/mtd/mtd_procfs/c and include/nuttx/mtd/mtd.h:  Add an
	  interface to un-register an MTD procfs entry.  From Ken Pettit
	  (2015-11-25).
	* drivers/mtd/filemtd.c:  A new MTD conversion layer that will
	  convert a regular file (or driver file) to an MTD device.  This is
	  useful for testing on the simulation using the hostfs.  From Ken
	  Pettit (2015-11-25).
	* drivers/loop:  Add a loop character device.  losetup() and
	  loteardown() should not be called directory from applications.
	  Rather, these functions are now available as IOCTL commands to the
	  loop driver (2015-11-25).
	* include/nuttx/net/netdev.h and several Ethernet drivers in arch/:
	  Most network drivers do not support statistics.  Those that do only
	  support them when DEBUG is enabled.  Each driver collects an
	  architecture specific set of statistics and there is no mechanism in
	  place to view those statistics.  Thus, the driver feature was mostly
	  useless.  This change standardizes the driver statistics and puts the
	  definition in the common network device structure defined in netdev.h
	  where they can be accessed by network applications.  All Ethernet
	  drivers that collect statistics have been adapted to use these common
	  statistics (2015-11-26).
	* net/net_procfs.c:  Add basic support for networking entries in the
	  procfs (2015-11-27).
	* mtd/filemtd.c and smart.c:  Add support for a /dev/smart loop device.
	  From Ken Pettit (2015-11-28).
	* sched/pthread/: CRITICAL BUGFIX: Logic was wiping out the indication
	  that of the type of a pthread.  Hence, it could be confused as a
	  task.  Found because this was causing a crash when /proc/nnn/cmdline
	  was printed (2015-11-29).
	* configs/same70-xplained/nsh:  The NSH configuration now seems fully
	  functional:  serial console, LEDs, buttons, SDRAM, and HSMCI SD card
	  (2015-11-30).
	* configs/same70-xplained/netnsh:  Added and verified a network-enabled
	  NSH configuration for the SAME70-Xplained board (2015-11-20).
	* net/: Remove CONFIG_NET_PINGADDRCONF.  This was a uIP way of assigning
	  IP addresses, but is not standard and not a appropriate feature in
	  general (2015-12-01).
	* fs/procfs:  The procfs file system can now be configured so that it
	  supports a runtime registration of procfs entries with
	  CONFIG_FS_PROCFS_REGISTER=y (2015-12-01).
	* arch/arm/src/stm32/stm32_ccm_procfs.c: Is no longer a part of the
	  'base' procfs entries and can now only be supported via run time
	  registration with CONFIG_FS_PROCFS_REGISTER=y (2015-12-01).
	* arch/arm/src/samv7/sam_tc.c:  Port the SAMA5 timer/counter driver
	  to the SAMV7 (2015-12-02).
	* arm/arm/src/samv7/sam_tickless.c:  Port the SAMA5/SAM4CM tickless
	  logic to the SAMV7 (2015-12-02).
	* fs/semaphore: Named semaphores:  Back out "fix" of 2015-10-22.  It was
	  correct before.  The change of 2015-10-22 probably broke named
	  semaphores (2015-12-02).
	* arch/arm/src/samv7: Bring programmable clock logic from SAMA5 into
	  SAMV7 (2015-12-03).
	* arch/arm/src/samv7: Add PCK6 as an optional source for the timer/
	  counter clock (2015-12-04).
	* configs/samv7-xult/: If Tickless mode is selected then enable PCK6
	  as a timer/counter clock source (2015-12-04).

7.14 2016-01-28 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/samv7:  Port the TRNG driver from the SAMA5D3/4 to the
	  SAMV7 (2015-12-06).
	* arch/arm/src/samv7:  Port the WDT driver from the SAMA5D3/4 to the
	  SAMV7 (2015-12-06).
	* arch/arm/src/samv7:  Add an RSWDT driver (2015-12-06).
	* drivers/net/telnet.c:  Move the Telnet driver from apps/netutils/telnetd
	  to drivers/net.  It is a driver a belongs in the OS.  There are still
	  some interface related issues, however (2015-12-07).
	* configs/:  Update all configurations that use the Telnet daemon; those
	  configurations now need to separately enable the Telnet drvier
	  (2015-12-07).
	* drivers/net/telnet.c:  Now works like the loop device.  A new interface
	  called telnet_initialize() registers a telnet session "factory"
	  device at /dev/telnet.  Via ioctl, the factory device can create
	  instances of the telnet character devices at /dev/telnetN to support
	  Telnet sessions (2015-12-07).
	* arch/arm/src/samv7: In USBHS device driver, fix check if zero length
	  packet is needed (2015-12-08).
	* sched/pthread/: CRITICAL BUGFIX: Logic was wiping out the indication
	  that of the type of a pthread.  Hence, it could be confused as a
	  task.  Same problem as fixed on 2015-11-29, but in different location
	  (2015-12-09).
	* sched/module:  Add support for kernel modules.  Initial commit is
	  just the ELF module support with name changes (2015-12-10).
	* configs/samv71-xult/module:  Add configuration for testing OS
	  modules (2015-12-12).
	* sched/module:  Add an implementation of rmmod() (2015-12-12).
	* sched/module and fs/procfs:  Add some basic module procfs support
	  (2015-12-12),
	* arch/arm/src/armv7-r:  Add basic architecture support for the ARMv7-R
	  processor family (2015-12-13).
	* drivers/led:  Adds a driver for the PCA9635PW I2C LED driver IC which
	  can be used to control the intensity of up to 16 LEDs.  From Alexander
	  Entinger (2015-12-15).
	* configs/launchxl-tms57004:  Add basic board support for TI LaunchXL-
	  TMS57004.  Not much to see there yet (2015-12-15).
	* waitpid:  CRITICAL BUGFIX.  Add a reference count to prevent waitpid
	  from using stale memory released by the waited-for task group
	  (2015-12-22).
	* sys/time.h: Add timeradd(), timersub(), timerclear(), timerisset(),
	  and timercmp() as macros. These are non-POSIX interfaces, but
	  included in most BSD deriviatives, including Linux.  From Manuel Stühn
	  (2015-12-23).
	* arch/arm/src/stm32:  Add timer input capture driver.  From Pierre-Noel
	  Bouteville (2015-12-24).
	* arch/avr:  Add support for the Atmega2560.  From Dimitry Kloper
	  (2015-12-19).
	* configs/arduino-mega2560: Add support for the Arduino-Mega2560.  From
	  Dimitry Koper (2015-12-29).
	* sched/signal, sched/mqueue, sched/timer, include/signal.h,
	  include/nuttx/signal, fs/aio, libc/aio, and probably other
	  directories:  Add support for the SIGEV_THREAD notification method in
	  struct sigevent.  This initial implementation will only work in the
	  FLAT build.  See the top-level TODO file for additional details
	  (2015-12-30).
	* include/nuttx/compiler.h, include/nuttx/streams.h include/stdio.h
	  include/syslog.h libc/stdio/, and libc/syslog: introduce support for
	  Atmel toolchain in-flash strings.  Atmel toolchain AVR compiler
	  provides a transparent in-flash object support using __flash and
	  __memx symbols. The former indicates to compiler that this is a flash-
	  based object.  The later used with pointer indicates that the referenced
	  object may reside either in flash or in RAM. The compiler automatically
	  makes 32-bit pointer with flag indicating whether referenced object is
	  in flash or RAM and generates code to access either in run-time. Thus,
	  any function that accepts __memx object can transparently work with RAM
	  and flash objects.
	  For platforms with a Harvard architecture and a very small RAM like AVR
	  this allows to move all constant strings used in trace messages to flash
	  in the instruction address space, releasing resources for other things.
	  This change introduces IOBJ and IPTR type qualifiers.  The 'I' indicates
	  that the object may lie in instruction space on a Harvard architecture
	  machine. For platforms that do not have __flash and __memx or similar
	  symbols IOBJ and IPTR are empty, making the types equivalent to, for
	  example, 'const char' and 'const char*'.  For Atmel compiler these will
	  become 'const __flash char' and 'const __memx char*'.  All printf()
	  functions and syslog() functions are changed so that the qualifier is
	  used with the format parameter.  From Dimitry Kloper (2016-01-05).
	* drivers/net/tun.c:  Fix a compile time error in the TUN driver.  From
	  Vladimir Komendantskiy (2016-01-05).
	* Kconfig and include/debug.h:  Add configuration to support an
	  architecture-specific debug.h header file. From Dimitri Kloper
	  (2016-01-09).
	* arch/avr/include/debug.h: Add an AVR-specific header file used when
	  the AVR MEMX pointer is used.  From Dimitri Kloper (2016-01-09).
	* tools/cnvwindeps.c:  Add a tool that will convert paths in
	  dependencies generated by a Windows compiler so that they can be
	  used with the Cygwin make (2016-01-09).
	* tools/mkwindeps.sh: A script that coordinates use of cnvwindeps.exe
	  (2016-01-09).
	* tools/mkdeps.c:  Deleted mkdeps.sh and mkdeps.bat.  The mkdeps
	  executable generated from mkdeps.c is now that the only supported
	  way to make dependencies (2016-01-09).
	* tools/mkdeps.c:  Extended/fixed support for --winpath option.
	  Dependencies now work under Cygwin with a native Windows toolchain
	  (2016-01-10).
	* libc/netdb:  Add support for the use of a DNS resolver file like
	  /etc/resolv.conf (2016-01-14).
	* drivers/sensors/mcp9844.c and include/nuttx/sensors/mcp9844.h: Driver
	  for the MCP9844 I2C digital temperature sensor with a selectable
	  resolution.  From Alexander Entinger (2016-01-15).
	* arch/arm/src/lpc43xx: Numerous LPC43 improvements to SPIFI and ADC
	  from Lok Tep (2016-01-15).
	* configs/lpc4337-ws:  Support for the WaveShare LPC4337-WS board.  From
	  Lok Tep (2016-01-15).
	* drivers/wireless/pn532.c: Add driver for the NXP pn532 NFC-chip.  From
	  Janne Rosberg and others at Offcode Ltd (2016-01-17).
	* drivers/sensors/lsm9ds1.c:  Add driver for the STMicro LSM9DS1 chip.
	  The LSM9DS1 is a system-in-package featuring a 3D digital linear
	  acceleration sensor, a 3D digital angular rate sensor, and a 3D
	  digital magnetic sensor.  From Paul Alexander Patience (2016-01-17).
	* configs/olimex-stm32-h407:  Added a port to the Olimex STM32 H407
	  board. This board features the STMicro STM32F407ZGT6 (144 pins).
	  Contributed by Neil Hancock. (2016-01-18)
	* arch/arm/src/stm32/stm32_otgfs/hs/host.c:  Fix some backward
	  arguments to stm32_putreg().  Note by Hang Xu (2016-01-18).
	* include/nuttx/can.h and several CAN drivers:  Add more extensive
	  error reporting capaibility to the CAN interface.  From Frank
	  Benkert (2016-01-18).
	* libc/misc/lib_tea.h and include/nuttx/crypto/tea.h:  Add an
	  implementation of the Tiny Encryption Algorithm (2016-01-19).
	* sim/include: Now supports a customizable startup script with a
	  read-only passwd file (2016-01-20).
	* sim/nsh:  Uses the custom start up script, includes hooks for
	  an MOTD message. (2016-01-20).
	* include/clock.h and lots of other files:  If the 64-bit timer is
	  selected, then use it whenever clock_systimer() is called rather
	  then chopping the 64-bit timer down to 32-bits.  Add a new type,
	  systime_t to represent the 32- or 64-bit system timer (2016-01-21).
	* sched/clock/clock_systimespec.c:  Fix an error in a time
	  conversion (2016-01-21).
	* include/nuttx/clock.h:  Get rid of clock_systimer32() and
	  clock_systime64().  There is now only clock_systimer() (2016-01-21).
	* arch/arm/src/kinetis:  Numerous updates to the Kinetis ENET driver.
	  From Andrew Webster (2016-01-21).
	* arch/arm/src/kinetis: Add support for the MK60N512VLL100 Kinetis part.
	  From Andrew Webster (2016-01-21).
	* net/tcp and net/iob:  Numerous fixes, mostly relate to TCP and IOB
	  buffering and race conditions.  These were necessary for for the
	  NuttX networking later to be stable in some stress testing.  From
	  Andrew Webster (2016-01-22).
	* include/spi/spi.h:  Add an optional hwfeatures() method to the
	  SPI interface (2016-01-23).
	* drivers/spi/Kconfig and many other files:  Remove CONFIG_SPI_OWNBUS:
	  Now its not just a good idea, its the law (2015-01-23).
	* include/nuttx/math32.h and libc/misc:  Add some utilities to support
	  64-bit arithmetic operations for platforms that do not support long
	  long types.  Not yet used anywhere (2015-01-25).
	* arch/arm/src/samv7/chip:  Add an AFEC header file (2016-01-25).
	* net/iob:  iob_alloc_qentry() has the same issues as did iob_alloc()
	  fixed on 2016-01-23. (2016-01-26).
	* drivers/usbhost/hid_parser.c:  Wrong size used in memcpy().  From Hang
	  Xu (2016-01-25).
	* drivers/ioexpander/pca9555.c: Fixed a bug in the function pca9555_setbit
	  which occurs if someone tries to set one of the pins 8-15. The problem is
	  that after the check if the pin is greater than 7 the variable addr is
	  incremented and used in the Call I2C_WRITEREAD. But later in the call to
	  the I2C_WRITE buf[0] is used as address but this address is not incremented
	  as it should be. Note address does mean the address to the register in the
	  ioexpander and not the I2C address.  From Stefan Kolb (2016-01-26).
	* drivers/ioexpander/pca9555: Convert to use I2C_TRANSFER vs. I2C_WRITEREAD,
	  the former is thread safe while the latter is deprecated (2016-01-26).
	* drivers/i2c/i2c_writeread.c:  Create a wrapper that uses I2C_TRANSFER
	  to implement I2C_WRITEREAD functionality (2016-01-26).
	* I2C: Eliminate the I2C_WRITEREAD method (2016-01-26).
	* drivers/i2c/i2c_read.c and i2c_write.c: Convert to use I2C_TRANSFER vs.
	  I2C_READ and I2C_WRITE which are not thread safe (2016-01-26).
	* SPI: Rename the STM32 up_spiinitialize() to stm32_spibus_initialize()
	  (2016-01-26).
	* SPI: Rename the SAM up_spiinitialize() to sam_spibus_initialize()
	  (2016-01-26).
	* SPI: Rename the Tiva up_spiinitialize() to tiva_spibus_intialize()
	  (2016-01-26).
	* SPI: Rename the PIC32MX/MZ up_spiinitialize() to pic32mx/mz_spibus_intialize()
	  (2016-01-26).
	* SPI: Rename EFM32's efm32_spi_initialize to efm32_spibus_initialize()
	  for compatibility with these other changes (2016-01-26).
	* SPI: Rename the KL up_spiinitialize() to kl_spibus_intialize() (2016-01-26).
	* SPI: Rename the Kinetis up_spiinitialize() to kinetis_spibus_intialize()
	  (2016-01-26).
	* SPI: Rename the LPC31xx up_spiinitialize() to lpc31_spibus_intialize(),
	  Rename the LPC17xx lpc17_spiinitialize() to lpc31_spibus_intialize(),
	  Rename the LPC43xx up_spiinitialize() to lpc43_spibus_intialize()
	  (2016-01-26).
	* SPI: Rename the AVR up_spiinitialize() to avr_spibus_intialize(),
	  Rename the LPC2148 up_spiinitialize() to lpc214x_spibus_intialize(),
	  Rename the Calypso up_spiinitialize() to calypso_spibus_intialize(),
	  Rename the ez80 up_spiinitialize() to ez80_spibus_intialize(),
	  Rename the STR71xx up_spiinitialize() to str71_spibus_intialize(),
	  Rename the i.MX1 up_spiinitialize() to imx_spibus_intialize(),
	  Rename the LPC2378 up_spiinitialize() to lpc23_spibus_intialize(),
	  Rename the M9S12 up_spiinitialize() to hcs12_spibus_intialize(),
	  Rename the x86 up_spiinitialize() to i486_spibus_intialize(),
	  Rename the z16f up_spiinitialize() to z16_spibus_intialize().
	  up_spiinitialize() has been completely eliminated. (2016-01-27).
	* fs/vfs/fs_poll.c: Fix handling of sem_tickwait() return value
	  sem_tickwait() does not return an -1+errno, it returns a negated
	  errno value.  Noted by Freddie Chopin.

7.15 2016-03-27 Gregory Nutt <gnutt@nuttx.org>

	* drivers/analog/ads1242.c and include/nuttx/analog/ads1242.h:  Driver
	  for the  24-Bit Differential Input ADC ADS1242 that communicates via
	  SPI with a MCU. Reading the ADC conversion result as well as configuring
	  the ADC, setting the input channel, etc. is implemented via ioctl calls.
	  However, it does not yet implement the standard ADC interface.  From
	  Alexander Entinger (2016-01-29)
	* configs/board/src/xyz_cxxinitialize.c:  Move C++ initialization logic
	  out of the RTOS and into the application space, specifically to
	  apps/platform/board, where it belongs (2016-01-29).
	* drivers/modem/u-blox.c and include/nuttx/drivers/u-blox.h:  Add an upper
	  half driver for the U-Blox Modem.  From Vladimir Komendantskiy
	  (2016-01-30).
	* arch/arm/src/lpc17xx: Backport lpc43xx I2C driver, replacing the
	  lpc17xx I2C driver.  This gives us the I2C_TRANSFER method (2016-01-30).
	* arch/arm/src/lpc11xx: Backport the lpc17xx I2C driver, replacing the
	  lpc11xx I2C driver.  This gives us the I2C_TRANSFER method (2016-01-30).
	* arch/arm/src/lpc2378: Backo the Lpc17xx I2C driver, replacing the
	  lpc2378 I2C driver.  This gives us the I2C_TRANSFER method (2016-01-30).
	* configs/u-blox-c027:  Support for the u-blox GSM and GPS module evaluation
	  board with NXP LPCExpresso LPC1768.  The GSM module is one of LISA-C200,
	  LISA-U200 or SARA-G350. The GPS module is one of MAX-M7 or MAX-M8.  From
	  Vladimir Komendantskiy (2016-01-31).
	* drivers/, arch/, include/, numerous files:  Restructuring of the I2C
	  interface necessary to eliminate some thread-safety issues inherent in
	  the legacy I2C interface design.  This effects the interface definition,
	  all I2C clients, and all low-level I2C drivers.  I have used caution,
	  but I still expect a change of this magnitude to introduce some errors.
	  Any bug reports of bug fixes will be much appreciated (2016-02-01).
	* drivers/i2c/i2c_driver.c:  Add an I2C character drivers to support
	  raw I2C data transfers for test applications (2016-02-02).
	* I2C_RESET:  Eliminate up_i2creset().  It should not be a global function;
	  Now it is an I2C interface method (2016-02-02).
	* I2C: Rename up_i2cinitialize and up_i2cuninitilize to follow the correct
	  naming convention.  These are not common interfaces used by the OS;
	  these are MCU-specific interfaces used only be MCU-specific code.  The
	  the correct naming is xyz_i2cbus_initialize and xzy_i2cbus_uninitialize
	  where xzy is the MCU mnemonic (2016-02-02).
	* Networking drivers that support CONFIG_NET_NOINTS:  Fix a race condition
	  that can cause the TX poll timer to stop running.  From Manuel Stuhn
	  (2016-02-03).
	* All Network drivers:  Remove the hsec parameter from devif_timer().
	  We can get better timing accuracy without it (2016-02-03).
	* drivers/ioexpander/pca555.c:  Add logic to make the PCA555 driver
	  thread safe (2016-02-03).
	* sched/init/os_start.c and include/nuttx/init.h:  Add a state variable
	  that provides the current level of OS initialization.  This is needed by
	  some logic that may attempt to run early in the start-up sequence but
	  cannot run if a sufficient level of initialization has not yet occurred
	  (2016-02-05).
	* libc/syslog/lib_syslog.c: If syslog timestamping is enabled, don't try to
	  get the time if the timer hardware has not yet been initialized
	  (2016-02-05).
	* fs/procfs/fs_procfskmm.c:  Add /proc/kmm entry that shows that state of
	  the kernel heap.  Only useful in PROTECTED and KERNEL build modes where
	  there is a kernel heap (2016-02-06).
	* sched/ and arch/: Replace explicit access to the OS internal data structure
	  g_readytorun() with the wrapper this_task() which hides the implementation
	  and will permit such things as more scalable representations of task queues
	  and SMP (2016-02-06).
	* include/nuttx/net/arp.h, include/nuttx/net/ioctl.h, net/netdev/netdev_ioctl.c,
	  and ARP-related files: Add support for IOCTL commands to manage the
	  ARP table (2016-02-08).
	* ARMv7-A, ARMv7-R, and ARMv7-A: Add test-and-set logic and definitions
	  needed to supports spinlocks (2016-02-09).
	* include/nuttx/spinlock.h:  Add basic definitions for spinlocks.  Not yet
	  used by NuttX (2016-02-09).
	* include/nuttx/arch.h, sched/sched/sched.h:  Add some basic definitions
	  that may be needed for SMP support (2016-02-10).
	* sched/init/os_start.c, sched/init/os_smpstart.c, and include/nuttx/arch.h:
	  Add some tentative SMP start-up logic (2016-02-10).
	* arch/arm/sim/up_head.c and up_simsmp.c:  Add multi-CPU support to the
	  simulation to support SMP investigation..  Currently crashes when CONFIG_SMP
	  is enabled as expected (2016-02-10).
	* sched/sched.h and other files:  Replace the bool 'prioritized' in the task
	  list table with a uint8_t bit set so that additional attributes of a task
	  list can be provided without adding more booleans (2016-10-11).
	* Everywhere: Replace irqsave() with enter_critical_section(); replace
	  irqrestore() with leave_critical_section().  This is part of the onging
	  development of SMP support (2016-02-13).
	* Conform to naming convention:  Rename irqsave() to up_irq_save(); rename
	  irqrestore() to up_irq_restore().  These should no longer be used.  If
	  your code still uses them, please switch to enter_critical_section()
	  and leave_critical_section() (2016-02-14).
	* Also rename irqdisable() and irqenable() to up_irq_disable() and
	  up_irq_enable() (2016-02-14).
	* sched/signal and include/nuttx/sched.h:  Move the list of signal
	  actions from the TCB to the group structure.  Signal handlers are not
	  per thread but, rather, per task group.  I know, I preferred it the
	  other way too, but this is more compliant with POSIX (2016-02-18).
	* fs/ procfs/fs_procfsproc.c: Add support for showing CPU if SMP is
	  enabled (2016-02-19).
	* include/pthread.h, sched.h, sys/types.h and other files: Rename
	  cpuset_t to cpu_set_t which is the type used in some non-standard
	  Linux/GNU interfaces.  Move definitions of cpu_set_t to include/sys/types.h.
	  Add prototypes for sched_setaffinity(), sched_getaffinity(),
	  pthread_attr_setaffinity_np(), pthread_attr_getaffinity_np(),
	  pthread_setaffinity_np(), and pthread_getaffinity_np().  No implementation
	  is yet in place (2016-02-19).
	* sched/sched_cpuselect.c, include/nuttx/sched.h, and other files.  Add
	  a CPU affinity set to the TCB if SMP is enabled and use this CPU set as
	  a mask for determining which CPUs the thread may run on (2016-02-19).
	* libc/pthread, sched/pthread/pthread_start.c, and include/pthread.h:
	  Add an affinity field to the attrributes to permit controlling
	  which CPUs a pthread may run on.  Implements pthread_att_setaffinity_np()
	  and pthread_attr_getaffinity_np() (2016-02-19).
	* sched/pthread:  Add pthread_setaffinity() and pthread_getaffinity()
	  (2016-02-19).
	* sched/sched: Add sched_setaffinity() and sched_getaffinity() (2016-02-19).
	* drivers/leds/rgbled.c: Add a driver to manage a RGB LED via PWM.  From
	  Alan Carvalho de Assis (2016-02-22).
	* arch/arm/src/stm32f4discovery: Add PWM support for the onboard RGB LED
	  From Alan Carvalho de Assis (2016-02-22).
	* arch/arm/src/samv7: HSMCI driver can now be configured to handle unaligned
	  data buffers (2016-02-22).
	* fs/fat:  Add an option to force all transfers to be performed indirectly
	  using the FAT file system's internal sector buffers (2016-02-22).
	* drivers/wireless/ieee802154: New directory.  Nothing there yet (2016-02-25).
	* wireless/: New top level directory.  Nothing there yet (2015-02-26).
	* wireless/ieee802154: Add an new directory to the build.  Nothing there
	  yet (2016-02-26).
	* include/nuttx/wireless/ieee802154: Add directory (and dummy header file)
	  (2016-02-16).
	* arch/arm/include and src: Rename the imx directories to imx1 to make room
	  in the namespace for other members of the i.MX family (2016-02-27).
	* arch/arm/include/imx6 and src/imx6:  Evolving support for the NXP/Freescale
	  i.MX6Q (2016-02-28).
	* configs/sabre-6quad:  Placeholder that will eventually become board support
	  for the NXP/Freescale Sabre 6Quad board (2016-02-28).
	* arch/arm/src/stm32:  Support for STM32F46xx from Paul Alexander Patience
	* sched/semaphore/sem_reset.c and include/nuttx/semaphore.h: Add an internal,
	  non-standard interface to reset a semaphore count.  This is sometimes
	  needed by drivers in order to recover from error conditions (2016-03-05)
	* AT24xx driver: Correct missing address calculation logic.  From Frank
	  Benkert (2016-03-08).
	* arch/ renaming:  current_regs renamed to g_current_regs in all
	  architectures.  For ARM which is slowly developing SMP capability,
	  g_current_regs is now an array of dimension 1 in most case but of higher
	  dimension of the architecuture supports multiple CPUs (2016-03-09).
	* MTD: Increase block size in mtd_geometry_s to 32-bits (2016-03-09).
	* include/nuttx/clock.h:  Missing parenteses in MSEC2TICK macro can
	  cause wrong calculations.  From Stefan Kolb (2016-03-09).
	* Build system:  Added a 'make olddefconfig' target that will refresh
	  a .config file without interaction.  tools/refesh.sh now has a --silent
	  option so that it can be used in batch modes without human input
	  (2016-03-09).
	* tools/testbuild.sh:  .config files were not being updated because (a)
	  kconfig-conf was being called in the wrong directory and (b) apps/Kconfig
	  had not yet been created.  Now uses 'make olddefconfig' (2016-03-09).
	* arch/arm/src/stm32l4 and include/stm32l4:  Add support for the STM32L4
	  family.  From Sebastien Lorquet (2016-03-10).
	* configs/nucleo-l476:  Add support for the Nucleo-L476 board.  From
	  Sebastien Lorquet (2016-03-10).
	* sched/tls and include/nuttx/tls.h:  Basic definitions needed to support
	  thread local storage (TLS).  Not used anywhere yet (and may not be used
	  in the near future either) (2016-03-10).
	* sched/sched_note.c and include/nuttx/sched_note.c:  Add a configuration
	  option to buffer RTOS instrumentation data in an in-memory buffer
	  (2016-03-17).
	* drivers/syslog/note_driver.c:  Add a character driver that will allow
	  an application to read buffered scheduler instrumentation data (2016-03-17).
	* arch/arm/src/samv7/sam_usbdevhs.c:  The USB driver has had some issue that
	  would occasionally cause loss of packets.  Back last December, a fix was
	  put in for this but the fix apparently worsens the problem; now causing
	  hangs.  The basic problem is that the number of busy banks (NBUSYBKS)
	  status is not real time but is delayed.  This was fixed; now when the DMA
	  completes and NBUSYBKS > 0, the NBUSYBK is interrupt is enabled and the
	  operations are deferred until NBUSYBKS is truly zero (2016-03-17).
	* net/tcp/tcp_timer.c:  Fix some logic when there are multiple network
	  interfaces.  In this case, TCP timeout events can really only being
	  processed when the poll from the correct device is received (2016-03-20).
	* sched/wqueue/kwork_signal.c:  Fix logic to find an IDLE worker thread;
	  the test for busy was backward.  From Linfei Chen (2016-03-22).
	* include/sys/boardctl.h, configs/boardctl.c, and many configurations:  Add
	  boardctl() support that will permit applications to control USB devices
	  (2016-03-25).
	* configs/stm32l476vg-disco: Add support for the STM32L476VG Discovery
	  board.  From Dave (2016-03-25).

7.16 2016-06-01 Gregory Nutt <gnutt@nuttx.org>

	* PM: Add activity domain to all PM interfaces and driver callbacks.  If
	  CONFIG_PM_NDOMAINS == 1, then the legacy behavior is preserved.  If
	  CONFIG_PM_NDOMAINS > 1, then multiple PM domains are supported.  This
	  will allow separate control for certain power management groups.  For
	  example, a network can be shut down without affect an ongoing UI (and
	  vice versa) (2016-03-27).
	* apps/configs/vsn:  Removed the VSN configuration from the main NuttX
	  repository.  The VSN can still be found in the Obsoleted repository
	  (along with a full explanation in the README file there) (2016-03-29).
	* arch/arm/src/armv7-m and stm32:  Add support for the IAR toolchain for
	  the limited case of the ARMv7-M architecture and the STM32 chip.  From
	  Aleksandr Vyhovanec (2016-04-02).
	* arch/arm/src/stm32/stm32f40xxx_rtc.c:  Add a custom RTC driver.  From
	  Neil Hancock (2016-04-02).
	* include/nuttx/timer/rtc.h and drivers/timers/rtc.c:  Simplify the RTC
	  interface.  The old interface was way to complex and was not fully
	  implemented anywhere (2016-04-02).
	* Moved NuttX repository to https://bitbucket.org/nuttx/nuttx (2016-04-06).
	* arch/arm/src/armv7-m/iar:  Convert more assembly language files for
	  use with the IAR toolchain.  From Kha Vo (2016-04-08)
	* Fix miscellaneous build issues for the IAR compiler.  From Kha Vo
	  (2016-04-08).
	* tools/ide_exporter.py:  IDE exported Python script for use with the
	  IAR toolchain.  From Kha Vo (2016-04-08).
	* STM3220G-EVAL:  Add support for both the IAR and uVision GCC IDEs
	  From Kha Vo (2016-04-08).
	* STM32F429I Discovery:  Add support for the uVision GCC IDE.   From
	  Kha Vo (2016-04-08).
	* libc/signal and include/signal.h: Rename sigset() to signal().
	  sigset() is the System V function; signal() is the obsoleted POSIX
	  name.  These seem to be equivalent.  Neither are relevant in modern
	  POSIX programming but the name signal() probably has the better
	  credentials.  sigset() is now relegated to a #define in signal.h that
	  makes it equivalent to signal() (2016-04-10).
	* configs/nucleus2g:  Removed the Nucleus2G configuration.  There has
	  not been any activity with the commercial board in a few years and it
	  no longer appears to be available from the 2g-eng.com website.
	  Since the board is commercial and no longer publicly available, it
	  no longer qualifies for inclusion in the open source repositories.
	  The code as of this data is still available in the Obsoleted
	  repository at configs/nucleus2g (2016-04-12).
	* arch/arm/src/stm32l4: Fix the STM32L4 SPI driver.  That SPI driver is
	  quite different. They now handle frames of arbitrary size between 4
	  and 16 bits. It was broken before a new bit has to be set (RX fifo
	  threshold) to handle <= 8-bit transactions. If not set, the default is
	  16-bit packed >=8-bit frames and the RXNE bit is never set (it is set
	  when 16-bits are received). weird things as always.
	  This also add 8-bit access routines to the data register, because a
	  16-bit access to the data register when the frame size is below 9 bits
	  is interpreted as a packed dual frame exchange. Sebastien Lorquet
	  (2016-04-13).
	* net/sockets/listen.c and accept.c and include/nuttx/net:  Separate
	  out psock_listen() and psock_accept() for internal OS usage
	  (2016-04-14).
	* fs/inode/, fs/vfs/, and sched/task/:  File and socket descriptors are
	  no longer allocated for kernel threads.  They must use SYSLOG for
	  output and the low-level psock interfaces for network I/O.  This
	  saves a little memory which might be important for small footprint
	  configurations (2015-04-14).
	* Framebuffer driver:  Add a display number to each interface in order
	  to support multiple display devices (2015-04-14).
	* drivers/wireless/nrf24l01.c: Fix backward calculation of relative
	  frequency.  Noted by Henry Zhang (2015-04-15).
	* drivers/sensors/h1750fvi.c:  Add a character driver for Rohm Ambient
	  Light Sensor BH1750FVI.  From Alan Carvalho de Assis (2016-04-15).
	* configs/stm32f4discovery: Integrate BH1750FVI driver in the
	  STM32F4Discovery board.  From Alan Carvalho de Assis (2016-04-15).
	* drivers/mtd: Add MTD support for Micron N25Qxxx family of QSPI flash.
	  From Dave dev@ziggurat29.com (2016-04-17).
	* arch/arm/src/stm32l: Add a QSPI driver. From Dave dev@ziggurat29.com
	  (2016-04-18).
	* configs/stm32l476vb-disco:  Add support for QSPI based N25Qxxx flash.
	  From Dave dev@ziggurat29.com (2016-04-18).
	* graphics/vnc:  Add support for a VNC server.  This logic is code
	  complete, but untested and so not ready for prime time (2016-04-18).
	* configs/samv71-xult/vnc:  Add a configuration that will be used to
	  verify VNC (also untested) (2016-04-18).
	* drivers/ioexpander: Fix an error in the PCA9555 driver: Under certain
	  error conditions, interrupts were not being re-enabled.  Sebastien
	  Lorquet (2016-04-20).
	* arch/arm/src/stm32 and configs/stm32f429i-disco:  Correct some bad
	  commits that broke the LTDC display example.  From Marco Krahl
	  (2016-04-22).
	* configs/samv71-xult/vncwwm:  Add a more complex NxWM configuration
	  to support further VNC testing (particularly of VNC keyboard and
	  mouse inputs).  Initial configuration is not functional (2016-04-23).
	* arch/arm/src/stm32l4: Add support for QSPI DMA. From Dave
	  dev@ziggurat29.com (2016-04-24).
	* configs/stm32l476vg-disco: Update stm32l4 disco board to reflect QSPI
	  DMA support. From Dave dev@ziggurat29.com (2016-04-24).
	* arch/arm/src/stm32l4: Add configuration options to allow SRAM2 to be
	  used for heap, or not at all, and to zero-initialize it on OS start,
	  or not at all. From Dave dev@ziggurat29.com (2016-04-24).
	* drivers/mtd/smart.c:  Return code of smart_scan not checked, can
	  cause success result in failure case, leading to 'dev' pointer being
	  invalid. From Dave dev@ziggurat29.com (2016-04-27).
	* arch/arm/src/stm32l4: Add support for QSPI memory mapped mode. From
	  Dave dev@ziggurat29.com (2016-04-27).
	* configs/stm32l476vg-disco: Add board ioctls for allowing user
	  application to cause QSPI memory mapped mode to be engaged and
	  disengaged.  Also partitioned QSPI flash for file system and other
	 (eventually xip).  From Dave dev@ziggurat29.com (2016-04-27).
	* fs/mount: Fix a backward debug assertion.  Noted by David Sidrane
	  (2016-04-29).
	* arch/arm/src/stm32l4: Add support for HSE and MSI clocks, and auto
	  trim of MSI to LSE (needed for USB).  From Dave dev@ziggurat29.com
	  (2016-04-29).
	* arch/arm/src/stm32l4: Add support for unique id function to arch;
	  modified board to support unique id boardctl.  From Dave
	  dev@ziggurat29.com (2016-05-03).
	* Makefile.unix and tools/mkexport.sh: Pass top-level make to the
	  script to allow -j greater than 1.  From David Sidrane (2016-05-04).
	* arch/arm/src/stm32, stm32f7, stm32l4: Fix typo in variable name in
	  serial BREAK logic.  Review other serial implementations for similar
	  naming problems. (2016-05-05).
	* arch/arm/src/samv7:  Fix typo in MATRIX register definitions.  From
	  Stefan Kolb (2016-05-06).
	* arch/arm/src/stm32l4: Problem with resetting backup domain clears
	  clocking options set up before in *rcc.c use INITS flag to avoid magic
	  reg value to detect power up reset state of RTC correct a problem
	  clearing interrupt flags (they weren't) which prevented an alarm from
	  ever being used more than once per reset cycle.  From Dave
	  dev@ziggurat29.com (2016-05-07).
	* arch/arm/src/tiva: Fix a bug of GPIO falling-edge interrupt for tiva.
	  From Young (2016-05-07).
	* drivrs/mtd:  Add a driver for SST26F spi/qspi flash devices (SPI mode
	  only).  From Sebastien Lorquet (2016-05-10).
	* Several Makefiles: Add .PHONY definitions to prevent 'clean up to date'
	  message weirdness when 'make clean' is done with no .config or Make.defs
	  file (2016-05-10).
	* include/nuttx/can.h and drivers/can.c:  Improve CAN error reporting.
	  From Frank Benkert (2016-05-11).
	* fs/Kconfig:  Allow CONFIG_FS_WRITABLE to be manually selectable
	  (2016-05-11).
	* Various file:  Search for places where a stray semicolon following an
	  if condition cause the if body to be executed unconditionally.  Fixes
	  in all SAM DMA logic, unionfs, OS signalling logic,
	* configs/nucleo-144: Basic port for the Nucleo-144 board with the
	  STM32F746ZG MCU.  From Kconstantin Berezenko (2015-05-12).
	* arch/arm-src/armv7-a:  Complete re-design of logic to initialize each
	  CPUn, n > 0, when CONFIG_SMP=y (2016-05-13).
	* arch/arm/src/imx6 and configs/sabre-6quad:  The basic i.MX6 port is
	  complete.  This is a very minimal port at present and probably still
	  has some as-of-yet-undiscovered issues (2016-05-17).
	* arch/*/Makefile: Add definitions that can be overrided to use GCC
	  instead of LD in the final link.  From Paul Alexander Patience
	  (2016-05-18) .
	* arch/arm/src/stm32, stm32l4, and stm32f7 serial:  Add support for
	  compliant BSD-style breaks. From David Sidrane (2016-05-18).
	* enter/leave_critical_section() may attempt to access task lists before
	  they have been initialized in the SMP configuration (2016-05-18).
	* configs/stm32f103-minimum: Add support for this minimual STM32F103CBT6
	  "blue" board.  From Alan Carvalho de Assis (2016-05-18).
	* arch/arm/src/sam* Watchdogs:  Rename up_wdginitialize() to something
	  more appropriate for an internal, MCU-specific function (2016-05-18).
	* configs/*/src/*_watchdog.c:  Remove all implementations of
	  up_wdginitialize() which was only used by apps/examples/watchdog.
	  That internal OS function is no longer called from application code.
	  If you want to use the watchdog example, you will need to configure
	  the watchdog driver by calling the appropriate, MCU-specific driver
	  configuration function from your board initialization logic
	  (2016-05-18).
	* arch/srm/src/stm32l4: Add CAN support for STM32L4.  From Sebastien
	  Lorquet (2016-05-19).
	* arch/arm/src/samv7: Adds a JTAG config and ERASE config to  Kconfig to
	  set the CCFG_SYSIO SYSIO Pins.  From David Sidrane (2016-05-19).
	* arch/sim/src:  Enhance networking support for the simulation under Linux.
	  Includes updated support for Linux TUN/TAP, and the addition of support
	  for Linux bridge devices.  From Steve (2016-05-20).
	* configs/stm32f411e-disco:  Add basic configuration for stm32f411e-disco
	  board with STM32F411VE chip.  From Konstantin Berezenko (2016-05-20).
	* i.MX6 Sabre-6Quad: Basic SMP NSH configuration is now working.  But
	  this is probably only because the SMP NSH case does not stress the
	  logic.  There are know outstanding SMP issues as noted in the
	  Sabre-6Quad README.txt file (2016-05-22).
	* configs/sabre-6quad: Add an SMP configuration; Enable procfs in all
	  configurations (2016-05-22).
	* include/nuttx/crypto/aes.h:  Modifications to the crypto API needed
	  for LPC43xx.  From Alexander Vasiljev (2016-05-23).
	* arch/arm/src/lpc43xx:  Add AES support.  From Alexander Vasiljev
	  (2016-05-24).
	* configs/*/src/tiva_timer.c:  Tiva boards:  Fix a naming collision,
	  rename board-specific function from tiva_timer_initialize() to
	  tiva_timer_configure() to remove conflict (2016-05-23).
	* arch/arm/src/sam*:  Ensure that the TWIHS (i2c) hw get's its clock
	  set when the sequence of sam_i2cbus_initialize(),
	  sam_i2cbus_uninitialize(), then sam_i2cbus_initialize() or twi_reset()
	  is called.  I found this a while back in the stm32 family, so there
	  may be more arch-es with this sort of bug. I suppose any driver that
	  has the notion of "do not set the freq if it is already set" could be
	  suspect.  From David Sidrane (2016-05-23).
	* arch/arm/src/samv7: Add the up_systemreset interface to the samv7
	  arch.  The approach is slightly different in that: 1) It enables
	  ARCH_HAVE_RESET and allows the user to set if, and for how long, to
	  drive External nRST signal. It also does not contain a default
	  board_reset, as that really should be done in the config's src if
	  CONFIG_BOARDCTL_RESET is defined.  From David Sidrane (2016-05-23).
	* arch/arm/include/lpc43xx and src/lpc43xx: Adds definitions for the
	  LPC4337jet100 chip.  From Alexander Vasiljev (2016-05-24).
	* Many files:  board_app_initialize() now accepts an argument that may
	  be used to support initialization in different configurations
	  (2016-05-24).
	* arch/arm/src/samv7: Remove disabling of whole USB on suspend of USBHS.
	  This fix removes the disabling of the whole USB peripheral on suspend
	  interrupt. Its enough to freeze the clock instead. When disabling the
	  whole peripheral, the next wakeup-interrupt comes up with an disabled
	  clocking. The unfreeze clock has no effect, because the master clock
	  is disabled. This makes all registers, including the IDR unwriteable
	  and the IRQ falls in an endless loop blocking the whole system.
	  Furthermore the disabling of the peripheral clock prevents hotplugging
	  or reconnecting the USB.  From  Frank Benkert  (2015-05-25).
	* drivers/lcd: Add support for PCF8574 LCD Backpack driver. This driver
	  supports an interface board that is based on the PCF8574 io expander
	  and supports the HD44780-based (or compatible) LCD modules.  There
	  are a myriad of different vendors of such, but they are principally
	  the same, save wiring and minor features like jumpers for I2C
	  addresses. This driver supports known and unknown variants.  From
	  Dave (ziggurat29, 2013-6-26).
	* arch/arm/stm32:  Add support for a custom 1-wire driver.  The serial
	  driver already supports a 1-wire interface, but this driver uses the
	  same serial logic to implement a lower half driver much like the I2C
	  lower half driver.  From Aleksandr Vyhovanec (2015-05-25).
	* fs/: Add logic to detach a file structure from a file descriptor.
	  This is for use only within the OS.  It permits an open file or driver
	  to be used across multiple threads (2016-05-26).
	* arch/arm/src/stm32l4: Get I2C working for STM32L4.  From Dave
	  (ziggurat29) (2016-05-25).
	* fs/ and include/nuttx/fs: Add logic to detach a file structure from a
	  file descriptor.  This is for use only within the OS.  It permits an
	  open file or driver to be used across multiple threads.  (2016-05-26).
	* drivers/analog/adc.c, include/nuttx/analog/adc.h, and all ADC lower
	  half drivers:  No longer uses global adc_receive() call.  Added a new
	  bind() method to the ADC interface.  Now the ADC upper half driver
	  will register its receipt-of-data callback.  This change allows the
	  ADC lower half driver to be used with a differ ADC upper half
	  (2016-05-26).
	* drivers/analog/ads1255.c: Must not do SPI access from interrupt
	  handler.  Use the worker thread instead.  Must also lock the SPI bus
	  before using it. (2015-05-26).
	* drivers/:  Several SPI-based drivers modified.  All drivers that use
	  SPI must call SPI_LOCK and SPI_UNLOCK.  This is not optional
	  (2016-05-26).
	* drivers/sensors:  Fix a bug in crc computation for ms583730.
	  Implement POSIX read (2016-05-27).
	* arch/arm/src/samv7: This is a fix to a problem in the handling of the
	  oneshot timer. Due to a wrong assumption concerning the behavior
	  directly after the start of the timer/counter the function
	  sam_oneshot_cancel(…) calculates the wrong remaining time. The code
	  assumes that the counter register is zero directly after the start of
	  the timer, but this is not true. To start the time/counter a software
	  trigger is invoked, this trigger starts the timer/count and sets the
	  counter register to zero, but the reset of the counter register is not
	  performed instantly. According to the datasheet: "The counter can be
	  reset by a trigger. In this case, the counter value passes to zero on
	  the next valid edge of the selected clock." Thus the counter is set to
	  zero between 0 and USEC_PER_TICK microseconds after the clock was
	  started.
	  In my fix I use the freerun count value to determine if at least one
	  tick passed since the start of the timer and thus if the value of the
	  oneshot counter is correct. I also tried to use the function
	  up_timer_gettime(…) to achieve this but, at least if compiled with no
	  optimization the problem vanishes without using the value of the
	  function, the function call takes too long.
	  Another problem treated in the fix is that if the oneshot timer/counter
	  is canceled, we only know the remaining time with a precision of
	  USEC_PER_TICK microseconds. This means the calculated remaining time
	  is between 0 and USEC_PER_TICK microseconds  too long. To fix this I
	  subtract one tick if the calculated remaining time is greater than one
	  tick and otherwise set the remaining time to zero. By doing so the
	  measured times are much more precise as without it.  From Stefan Kolb
	  (2016-05-27).
	* arch/arm/src/sama5:  Stefan Kolb's change to the SAMV7 Oneshot Timer
	  should also be applied to the SAMA5 oneshot time since the drivers are
	  identical (2016-05-27).
	* arch/arm/src/stm32l4: Add support for SPI 4 and 5 on stm32f411 chips.
	  From Konstantin Berezenko (2016-05-27).
	* arch/arm/src/sam34:  Stefan Kolb's change to the SAMV7 Oneshot Timer
	  should also be applied to the SAM3/4 oneshot time since the drivers
	  are identical (2016-05-29).
	* arch/arm/src/stm32: Allow to not use all channel in a lower part of
	  PWM.  From Pierre-noel Bouteville (2016-05-30).
	* libc/math: Add a NAN test on 'x' in asin function of lib_asin.c.
	  Suggested by Pierre-noel Bouteville (2016-05-31).
	* arch/arm/src/stm32: Fix logic in F4 RTCC driver that prevent ALARM
	  interrupt.  From Neil Hancock (2016-05-31).
	* arch/arm/src/stm32: Fix STM32 ValueLine ADC IRQ number selection.
	  From David Sidrane (2016-05-31).
	* arch/arm/src/samv7: Fix missing unlock of device in MCAN
	  mcan_txempty().  From Frank Benkert (2016-06-01).

7.17 2016-07-25 Gregory Nutt <gnutt@nuttx.org>

	* drivers/mtd/flash_eraseall.c:  Removed.  This is no longer used
	  in the OS and is simply a wrapper around the MDIOC_BULKERASE
	  IOCTL command.  It used to be called (only) from
	  apps/system/flash_eraseall, but that has been removed because it
	  violated the OS/application interface -- by calling flash_eraseall().
	  The old code can be found in the Obsoleted' repository (and a revised
	  version can be found at apps/fsutils/flash_eraseall) (2016-06-03).
	* arch/arm/src/stm32: STM32 Timer Driver: Change calculation of per-
	  timer pre-scaler value.  Add support for all timers (2016-6-03)
	* drivers/lcd:  Correct conditional compilation in ST7565 driver.  From
	  Pierre-noel Bouteville (2016-6-03)
	* arch/arm/src/stm32: Correct conditional compilation in STM32 timer
	  capture logic.  From Pierre-noel Bouteville (2016-6-03)
	* arch/arm/src/efm32: Fix EFM32 FLASH conditional compilation.  From
	  Pierre-noel Bouteville (2016-6-03)
	* arch/arm/src/lpc43xx: Fix errors in GPIO interrupt logic.  From v01d
	  (phreakuencies) (2016-06-04)
	* arch/arm/src/kl and lpc11xx: rename xyz_lowputc to up_putc.  Remove
	  all references to up_lowputc, everywhere (2016-06-04).
	* configs/stm32f103-minimum: Add minnsh configuration.  From Alan
	  Carvalho de Assis  (2016-06-04).
	* arch/arm/src/stm32: Add the up_getc() function to STM32 in order to
	  support the minnsh configuration.  From Alan Carvalho de Assis
	  (2016-06-04).
	* include/sys/boardctl.h:  Needs to be usable with C++ files (2016-06-05).
	* tools/tesbuild.sh will now build NxWM configurations (2016-06-05).
	* arch/arm/src/stm32:  In PWM driver, just update duty if frequency is
	  not changed and PSM started.  This removeis glitch or blinking when
	  only duty is frequently changed.  From Pierre-noel Bouteville (2016-06-05).
	* arch/arm/src/kinetis:  Add a USB device controller driver.  Derived from
	  the pic32mx usb driver, which uses the same usb controller.  From kfazz
	  (2016-06).
	* configs/teensy-3.x:  Add USB support and a usbnsh configuration.  From
	  kfazz (2016-06).
	* arch/arm/src/stm32:  Add support for the STM32F105R.  From Konstantin
	  Berezenko  (2016-06-06).
	* include/signal.h:  Change type of SIG_ERR, SIG_IGN, ... to
	  _sa_handler_t.  The type void does not work with the IAR toolchain.
	  From Aleksandr Vyhovanec (2016-06-07).
	* configs/nucleo-144: Refactored configs/nucleo-144 sub-directories to
	  support additional nucleo-144 board.  Add support for the Nucleo-F767ZI
	  board.  From David Sidrane (2016-06-07).
	* arch/arm/src/stm32f7 and include/stm32f7:  Added STM32F76xxx and
	  STM32F77xx families. From David Sidrane (2016-06-08).
	* Refactoring configs/nucleo-144 sub-directories to support additional
	  nucleo-144 board.  Add support for the Nucleo-F767ZI board. From David
	  Sidrane (2016-06-08).
	* include/assert.h: Check if NDEBUG is defined.  From Paul Alexander
	  Patience (2016-06-08).
	* arch/arm/src/stm32: Fix STM32 DMA code and configuration for STM32F37X
	  chips.  From Marten Svanfeldt (2016-06-08).
	* drivers/mtd: Add a driver of IS25xP SPI flash devices.  From Marten
	  Svanfeldt (2016-06-09).
	* arch/arm/src/Kconfig and configs/teensy-3.x: Teensy clock fixes.  The
	  High Gain bit in MCG_C1 was preventing teensy from booting except
	  after a programming session. The second change doesn't appear to
	  change any functionality, but complies with restrictions in the k20
	  family reference manual on FEI -> FBE clock transiions.  From kfazz
	  (2016-06-09).
	* configs/*/include/board.h: Fix timer input clock definitions.  From
	  David Sidrane (2016-06-09).
	* Networking:  In both IPv6 and IPv4 incoming logic:  (1) Should check
	  if the packet size is large enough before trying to access the packet
	  length in the IP header.  (2) In the comparison between the IP length
	  and the full packet length, need to subtract the size of the link
	  layer header before making the comparison or we will get false
	  positives (i.e., the packet is really too small) (2016-06-09)
	* configs/: All configurations that have both CONFIG_NSH_LIBRARY=y and
	  CONFIG_NET=y must now also have CONFIG_NSH_NETINIT=y (2016-06-09).
	* arch/arm/src/kinetis: Kinetis pwm support, based on kl_pwm driver.
	  From kfazz (2016-06-09).
	* arch/srm/src/stm32: Fix compilation errors in debug mode of
	  stm32_pwm.c.  From Konstantin Berezenko (2016-06-09).
	* arch/arm/src/kinetis: Support up to 8 channels per timer.  From kfazz
	  (2016-06-09).
	* lib/: crc16:  Fix error. From  Paul Alexander Patience (2016-06-10).
	* lib/: Add crc64 support. From  Paul Alexander Patience (2016-06-10).
	* arch/arm/src/kinetis: Added kl_dumpgpio functionality as
	  kinetis_pindump. From kfazz (2016-06-10).
	* arch/arm/src/sam34: Fix some errors in AFEC header file.  From
	  OrbitalFox (2016-06-10).
	* arch/arm/include/stm32: Correct the can2 rx irq number for stm32f10xx
	  chips. From Konstantin Berezenko (2016-06-10).
	* drivers/include/input: Button upper half driver:  Add definitions
	  needed for compilation with the poll() interface is not disabled
	  (2016-06-11).
	* Kconfig/, include/debug.h, and many other files:  (1) Debug features
	  are now enabled separately from debug output. CONFIG_DEBUG is gone.
	  It is replaced with CONFIG_DEBUG_FEATURES. (2) The macros dbg() and
	  vdbg() have renamed as err() and info(), respectively. This also
	  applies to all of the variants as well, lldbg(), llvdbg(), XXdbg(),
	  XXvdbg(), XXlldbg(), and XXllvdbg().  (3) Add a new debug level,
	  warn() (and all variants vwarn(), llwarn(), etc.). (4) Debug
	  assertions can now be enabled separately from debug output. (5) You
	  can now enable subsystem/device driver debug output at different
	  output levels. For example, CONFIG_DEBUG_FS no longer enables file
	  system debug output. It enables general file system debug logic and
	  enables selection of CONFIG_DEBUG_FS_ERROR, CONFIG_DEBUG_FS_WARN,
	  and CONFIG_DEBUG_FS_INFO (2016-06-12).
	* strtoul() and strtoull():  Fix errno settings required by function
	  definition.  Resolved Bitbucket Issue #1. From Sebastien Lorquet
	  (2016-06-13)
	* arch/arm/src/stm32f7:  Add SPI driver.  DMA not yet supported.  From
	  David Sidrane (2016-06-14).
	* configs/nucleo-144:  Add test for STM32 F7 SPI.  From David Sidrane
	  (2016-06-14).
	* alert(): New debug macro: alert().  This is high priority,
	  unconditional output and is used to simplify and stanardize crash
	  error reporting(2016-06-14).
	* arch/arm/src/tiva: Bug Fix in tiva_serial.c - UART5, UART6 and UART7
	  were not being configured as TTYS0 for printing over serial console.
	  From Shirshak Sengupta (2016-06-14).
	* SAMV7: SPI: SPI-Freq. 40MHz; VARSELECT; hw-features
	  This change adds the following improvements:
	  - Increase the allowed SPI-Frequency from 20 to 40 MHz.
	  - Correct and rename the "VARSELECT" option
	    This option was included in the code as "CONFIG_SPI_VARSELECT" but
	    nowhere  defined in a Kconfig file. The change renames it to
	    "CONFIG_SAMV7_SPI_VARSELECT" and corrects the implementation
	    according the datasheet of Atmel. In short, this option switches
	    the processor from "fixed peripheral selection" (single device) to
	    "variable peripheral selection" (multiple devices on the bus).
	  - Add a new Function to the interface to control the timing and delays
	    of the chip according the ChipSelect lines. This function can
	    control the delay between the assertion of the ChipSelect and the
	    first bit, between the last bit and the de-assertion of the
	    ChipSelect and between two ChipSelects. This is needed to tune the
	    transfer according the specification of the connected devices.
	  - Add three "hw-features" for the SAMV7, which controls the behavior
	    of the ChipSelect:
	    - force CS inactive after transfer: this forces a (short)
	      de-assertion of the CS after a transfer, even if more data is
	      available in time
	    - force CS active after transfer: this forces the CS to stay active
	      after a transfer, even if the chip runs out of data.
	      Btw.: this is a prerequisit to make the LASTXFER bit working at all.
	    - escape LASTXFER: this suppresses the LASTXFER bit at the end of the
	      next transfer. The "escape"-Flag is reset automatically.
	  From Frank Benkert (2016-06-14)
	* Many CONFIG_DEBUG_* options did not have matching macros defined in
	  include/debug.h.  Rather, there were various definitions scattered
	  throughout the sourse tree.  These were collected together and
	  centralized with single macro definitions in include/debug.h
	  (2016-06-15)
	* STM32F7: Add SPI, I2C, and ADC drivers.  From Lok Tep (2016-06-15).
	* err(), warn(), info(), and alert() renamed to include leading '_'.
	  This was done to avoid some naming collisions (2-06-16
	* STM32: Move backup domain reset to to earlier in the initialization
	  sequence (stm32_rcc.c() in order to avoid disabling LSE during RTC
	  initialiation.  From Alan Carvalho de Assis (2016-06-16).
	* SYSLOG: syslog() will now automatically redirect output to lowsyslog()
	  if called from an interrupt handler (2016-06-16).
	* STM32: When configuring a GPIO via stm32_configgpio() the function
	  will first set the mode to output and then set the initial state of
	  the gpio later on.  If you have an application with an externaly
	  pulled-up pin, this would lead to a glitch on the line that may be
	  dangerous in some applications (e.G. Reset Line for other chips,
	  etc).  This changes sets the output state before configuring the pin
	  as an output.  From Pascal Speck  (2016-06-17).
	* STM32 F7: Apply Pascal Speck's GPIO STM32 change to STM32 L4
	  (2016-06-17).
	* STM32 L4: Apply Pascal Speck's GPIO STM32 change to STM32 L4.
	  From Sebastien Lorquet (2016-06-17).
	* Review all uses of *err().  These macro family should indicate only
	  error conditions.  Convert *err() to either *info() or add ERROR:,
	  depending on if an error is reported (2016-06-17).
	* STM32F7: Review, correct, and update I2C, SPI, and ADC drivers.  From
	  David Sidrane (2016-06-17).
	* LPC17 Ethernet:  Needs to correctly ignore PHYID2 revision number
	  when comparing PHY IDs (2016-06-18).
	* SYSLOG: Consolidate all SYSLOG logic in drivers/syslog.  Add an
	  abstraction layer that supports:  (1) redirection of SYSLOG outpout.
	  This is usually so that you can boot with one SYSLOG output but
	  transition to another SYSLOG output when the OS has initialialized,
	  (2) adds common serialization of interrupt output as a configuration
	  option.  Without this configuration setting, interrupt level output
	  will be asynchronous.  And (3) vsyslog is now a system call and is
	  usable with other-than-FLAT builds (2016-06-19).
	* TCP Networking: While working with version 7.10 I discovered a
	  problem in TCP stack that could be observed on high network load.
	  Generally speaking, the problem is that RST flag is set in
	  unnecessary case, in which between loss of some TCP packet and its
	  proper retransmission, another packets had been successfully sent.
	  The scenario is as follows:  NuttX did not receive ACK for some
	  sent packet, so it has been probably lost somewhere. But before
	  its retransmission starts, NuttX is correctly issuing next TCP
	  packets, with sequence numbers increasing properly. When the
	  retransmission of previously lost packet finally succeeds, tcp_input
	  receives the accumulated ACK value, which acknowledges also the
	  packets sent in the meantime (i.e. between unsuccessful sending of
	  lost packet and its proper retransmission). However, variable unackseq
	  is still set to conn->isn + conn->sent, which is truth only if no
	  further packets transmission occurred in the meantime.  Because of
	  incorrect (in such specific case) unackseq value, few lines further
	  condition if (ackseq <= unackseq)is not met, and, as a result, we
	  are going to reset label.  From  Jakub �ągwa (2016-06-20).
	* SYSLOG: Remove lowsyslog(), vlowsyslog(), and associated macros
	  *llinfo(), *llwarn(), and llerr().  In the redesigned syslog() logic,
	  these serve no purpose (2016-06-20).
	* Make system: Need to build the drivers/ directory even it file
	  descriptors are not supported.  There are things in the drivers/
	  directory that are still needed (like SYSLOG logic) (2016-06-20).
	* assert.h: Define static assert for C++ usage.  From Paul Alexander
	  Patience (2016-06-21).
	* arch/arm/src/stm32l4:  Add ioctls to set/get bit timing in stm32l4.
	  Add ioctl hooks to allow future management of can id filters. From
	  Sebastien Lorquet (2016-06-21).
	* drivers/can.c:  Add support for poll. From Paul Alexander Patience
	  (2016-06-21).
	* drivers/syslog: Extend SYSLOG logic so that we can send SYSLOG output
	  to a file.  Not verified on initial commit  (2016-06-21).
	* arch/arm/src/stm32l4: Add some CAN mode IOCTL calls.  These will be
	  useful for device autotest when the application boots.  They are
	  redundant with the CONFIG_CAN_LOOPBACK option, which can now just be
	  interpreted as a default setting.  From Sebastien Lorquet (2016-06-22).
	* drivers/syslog: syslog_dev_flush() needs to check if the inode is a
	  mountpoint before calling the flush() method.  Noted by David Sidrane
	  (2016-06-22).
	* arch/arm/src/stm32f7: Adds SDMMC1 for stm32F7 74-75.  From Lok Tep
	  (2016-06-22).
	* drivers/syslog: SYSLOG character device channel will now expand LF to
	  CR-LF.  Controllable with a configuration option (2016-06-22).
	* arch/arm/src/stm32l4: Implementation of loopback IOCTLs.  From
	  Sebastien Lorquet (2016-06-22).
	* Documentation: Add SYSLOG documentation to the porting guide
	  (2016-06-22).
	* configs/stm32f746g-disco:  Removed knsh configuration it failed to
	  refresh (via tools/refresh.sh).  I assume that it is a hand-edited
	  configuration and, hence, must be removed from the repository
	  (2016-06-23).
	* arch/arm/arc/sam34: DAC bugfix: DACC_WPMR_WPKEY_MASK -> DACC_WPMR_WPKEY.
	  Timer bugfix:  Fix ops check in TCIOC_STOP.  From Wolfgang Reissnegge
	  (2016-06-23).
	* configs/nucleo-144: Added SDMMC support to Nucleo-144. From David
	  Sidrane (2016-06-23).
	* arch/arm/src/stm32: Port STM32L4 CAN IOCTLs to STM32.  From Sebastien
	  Lorquet (2016-06-24).
	* drivers/ioexpander:  Add support for a very simple GPIO driver.  It
	  supports only pre-conrigured input and output pins and only basic
	  input and output operations (2016-06-24).
	* arch/arm/src/lpc43xx:  Correct auto-negotiation mode in the LPC43xx
	  Ethernet.  From Alexander Vasiljev (2016-06-24)
	* arch/arm/src/samv7: TWIHS Driver improved and GPIO-Driver fixed for
	  Open-Drain Pins
	  - sam_gpioread: Now the actual line level from the pin is read back.
	    This is extremely important for Open-Drain Pins, which can be used
	    bidirectionally
	  - Re-Implemented twi_reset-function and enhanced it so it can be
	    called from inside the driver (see next point)
	  - Glitch-Filter: Added a configuration option to enable the twi-built-
	    in glitch filter
	  - Added a "Single Master Mode": In EMC Testing the TWI-Bus got stuck
	    because the TWI-Master detected a Multi-Master access (but there is
	    no second master). With the option "Single Master" we detect these
	    events and automatically trigger a twi_reset. We also do an
	    automatic recovery if a slave got stuck (SDA stays low).
	  With the above changes I²C-Bus reliability in harsh environments (eg.
	  EMC) is greatly improved. The small change in the GPIO-Driver was
	  necessary because otherwise you cannot read back the correct line
	  status of Open-Drain Outputs and this is needed by the twi_reset
	  function.  From Michael Spahlinger (2016-06-24)
	* arch/arm/src/stm32f7:  BUGFIX:PLLs IS2 and SAI P Calculation. From
	  David Sidrane (2016-06-24).
	* arch/arm/src/stm32f7: USB support.  From Lok Tep (2016-06-27).
	* configs/olimex-stm32-e407:  Add support for Olimex STM32 E407
	  board.  From Mateusz Szafoni (2016-06-27).
	* drivers/ioexpander: Shadow-Mode: The output- and configuration
	  registers of the IO-Expander are held in the microcontrollers memory
	  and only written to the IO-Expander.  This reduces bus traffic and
	  is more error-proof than the normal read-modify-write operation. Retry
	  Mode: If enabled and an error occurs while writing to the IO-Expander
	  the current transmission is automatically repeated once. From Michael
	  Spahlinger (2016-06-27).
	* libc/hex2bin:  Move the portable library portion of apps/system/hex2bin
	  to nuttx/libc/hex2bin where it can be shared with the OS internals
	  (2016-06-27).
	* configs/nucleo-144: Added USB OTG device to Nucleo-144.  From David
	  Sidrane (2016-06-27).
	* arch/arm/src/stm32l4:  STM32 CAN fixes need to be backported to
	  STM32L4 as well (2016-06-27).
	* ARM stack check: Fix double fault on IDLE task with stack size = 0.
	  From David Sidrane (2016-06-27).
	* configs/nucleo-144: Added bbsram test to Nucleo-144.  From David
	  Sidrane (2016-06-27).
	* arch/arm/src/stm32f7: Added PWR, RTC, and BBSRAM support for stm32f7.
	  From David Sidrane (2016-06-27).
	* Build system: Fixed build of SAMV71-XULT/nsh.  With the changes from
	  26f7b8c the build process of the default configuration did not succeed
	  anymore.  From Michael Spahlinger (2016-06-28).
	* sched/semaphore: Need to set errno to EINVAL on errors in sem_post()
	  and sem_wait(). From Paul Alexander Patience (2016-06-28).
	* Build system: This change fixes a build problem that only occurs when
	  reconfiguring from Linux to Windows or vice-versa.  It is a problem
	  that was present but not usually experienced until two things happened:
	  (1) The pre_config target was added to run before the menconfig
	  operation and (2) the context target was added before the pre_config
	  target in order to set up the correct symbolic links (in the apps/platform
	  directory) needed by the pre_config target.
	  But then now if you start with a Linux system and run 'make menuconfig'
	  to switch to Linux, the context target will execute first and set up
	  POSIX style symbolic links before doing the menuconfig.  Then after the
	  menuconfig, the make will fail on Windows if you are using a Windows
	  native toolchain because that native toolchain cannot follow the Cygwin-
	  style symbolic links.
	  The fix here is to also execute the clean_context AFTER executing
	  menuconfig.  A lot more happens now:  It used to be that doing 'make
	  menuconfig' only did the menuconfig operation.  Now it does context,
	  pre_config, menuconfig, clean_context.  Not nearly as snappy as it used
	  to be (2016-06-28).
	* arch/arm/src/efm32, lcp43, stm32, stm32l4: disable interrupts with
	  NVIC_IRQ_CLEAR.  From Paul Alexander Patience (2016-06-28).
	* arch/arm/src/stm32f7: STMF7xxx RTC: (1) Remove proxy #defines, (2)
	  Ensure the LSE(ON) etal are set and remembered in a) A cold start
	  (RTC_MAGIC invalid) of the RTC, and b) A warm start (RTC_MAGIC valid)
	  of the RTC but a clock change.  The change was needed because in bench
	  testing a merge of the latest's STM32  53ec3ca (and friends) it became
	  apparent that the sequence of operation is wrong in the reset of the
	  Backup Domain in the RCC code.  PWR is required before the Backup
	  Domain can be futzed with. !!!This Code should be tested on STM32 and
	  if needed rippled to the STM32 families.  From David Sidrane
	  (2016-06-28).
	* arch/arm/src/stm32f7: Added STMF7xxx RTC.  From David Sidrane
	  (2016-06-28).
	* arch/arm/src/stm32: STM32 BBSRAM fixed (and formatted) flags.  From
	  David Sidrane (2016-06-28).
	* arch/arm/src/stm32f7: STM32F7 BBSRAM fixed (and formatted) flags.
	  From David Sidrane (2016-06-28).
	* arch/arm/src/stm32f7: Added STM32F7 DBGMCU.  From David Sidrane
	  (2016-06-28).
	* arch/arm/src/samv7: SAMV7: CAN Message Filtering fixed: (1) stdfilters
	  didn't work because the filter was never enabled (wrong number of bits
	  to shift), and (2) Filters were never used because the configuration
	  register cannot be written without using the initialization mode.
	  Both bugs are fixed by this change. Filtering has been tested with
	  both standard and extended identifiers and is now working properly.
	  From Michael Spahlinger (2016-06-29).
	* configs/Kconfig and dummy/: Add logic to support custom board
	  directories that include a Kconfig file.  During the context phase
	  of the build, any Kconfig file in the custom board directory is copied
	  into configs/dummy, replacing the existing Kconfig file with the
	  target Kconfig file (2016-06-29).
	* arch/arm/src/stm32l4: Port support for both RX FIFOs from STM32 CAN.
	  From Paul Alexander Patience (2016-06-29).
	* Remove all inclusion of header files from the apps/include directory.
	  This caused a lot of reshuffling of logic:  binfmt pcode support,
	  usbmonitor is now a kernel thread, TZ/Olson database moved to
	  libc/zoneinfo (2016-06-29).
	* drivers/mtd: Several MTD FLASH drivers nullify the freed 'priv'
	  structure and failed to return NULL as stated in the comments.
	  Result, will operate on a NULL pointer later.  Noted by David Sidrane
	  (2016-06-30).
	* arch/arm/src/kinetis:  Add basic support for the K64 family.  I
	  leveraged the changes from https://github.com/jmacintyre/nuttx-k64f
	  and merged into the existing kinetis code  with a lot of changes and
	  additions (like pin multiplexing definitions).  (2016-07-01).
	* configs/freedom-k64f: Add support for the NXP Freedom-K64F board.
	  This is primarily the work of Jordan Macintyre.  I leveraged this
	  code from https://github.com/jmacintyre/nuttx-k64f but with
	  significant corrections (LEDs, buttons, README, etc) and extensions
	  and updates to match more recent BSPs (2016-07-01).
	* libc/signal: Add raise() (2016-07-04).
	* drivers/syslog: Add a SYSLOG character device that can be used to re-
	  direct output to the SYSLOG (2016-07-05).
	* net/netdev: Break out internal interface psock_ioctl() (2016-07-06).
	* configs/stm32f4disovery:  Add can driver for stm32f4discovery.  From
	  Matthias Renner (2016-07-06).
	* configs/freedom-k64f: Increase MCU clock to 120MHz (2016-07-06).
	* arch/arm/src/stm32:  Add support for Tickless mode (two timer
	  implementation).  From Max Neklyudov (2016-07-06).
	* drivers/usbdev: cdcacm_unbind leaks write request objects.  This
	  arises due to freeing the bulk IN endpoint before the loop that
	  frees the requests via cdcasm_freereq.  That function checks the
	  parameters and skips the freeing if either is NULL.  Freeing the bulk
	  IN enpoint will cause the first param to be NULL, thereby bypassing
	  the free operation.  To fix, I moved the release of the bulk IN
	  endpoint until after to loop (much as was the case for the OUT and
	  read requests, which did not exhibit the problem).  From ziggurat29
	  (2016-07-07).
	* arch/arm/src/stm32l4: Update usb dev/host controller drivers to
	  reflect new(ish) logging standards; augment device enpoint and fifo
	  allocation #defines to do more sanity checking, and be automatically
	  adaptive to size changes.  Update README.txt to reflect current status
	  of the implementation.  From ziggurat29 (2016-07-07).
	* arch/arm/src/stm32f7: Fixed STM32F7 DMA stm32_dmacapable.  DMA working
	  on SDMMC.  From David Sidrane (2016-07-07).
	* configs/stm32f4discovery:  add configuration files for canard.  From
	  Matthias Renner (2016-07-08).
	* drivers/pipe: Add missing configuration for pipe ring buffer size.
	  From Frank Benkert (2016-07-08).
	* STM32L4: Fix incorrect clock setup for LPTIM1.  From ziggurat29
	  (2016-07-08).
	* nucleo-l476rg and stm32lf76vg-disco: Define timer clock frequencies on
	  STM32L4-based boards.  From ziggurat29 (2016-07-08).
	* STM32L4: Add support for tickless OS, and incidentally timers, pwm,
	  oneshot, free-running....  From ziggurat29 (2016-07-08).
	* SAM3/4 I2C: Fix reversed logic in twi_startmessage().  From Wolfgang
	  Reissnegger (2016-07-09).
	* VFS ioctl().  Per comments from David Sidrane, file_ioctl() should not
	  return succeed if the ioctl method is not supported.  It probably
	  should return ENOTTY in that case (2016-07-09).
	* libm: This change should significantly improve the performance of
	  single precision floating point math library functions. The vast
	  majority of changes have to do with preventing the compiler from
	  needlessly promoting floats to doubles, performing the calculation
	  with doubles, only to demote the result to float. These changes only
	  affect the math lib functions that return float. From David Alessio
	  (2016-07-11).
	* STM32F4 Discovery: Add FPU support for ostest for the STM32F4Discovery
	  platform. From David Alessio (2016-07-11).
	* Build system:  Remove the includes/apps link to apps/include.  It is
	  no longer used.  From Sebastien Lorquet (2016-07-11).
	* printf(): If there are no streams, let printf() fall back to use
	  syslog() for output (2016-07-11).
	* Qemu-i486: Fix qemu-i486/ostest/Make.defs test for M32.  From Heath
	  Petersen (2016-07-12).
	* UART 16550: Handle when CONFIG_SERIAL_UART_ARCH_IOCTL is not enabled.
	  From Heath Petersen (2016-07-12).
	* Kinetis Ethernet:  Add support for the KSZ8081 PHY (2016-07-12).
	* SST26 Driver: Before accessing the sst26 flash, the "Global Unlock"
	  command must me executed, which I do in the sst26 driver.  BUT re-
	  reading the datasheet, the WREN instruction is required to enable the
	  execution of this command. This was not done. I have no idea how the
	  driver currently works except by chance. The writes should never
	  happen at all, the flash is half-enabled!  From Sebastien Lorquet
	  (2016-07-12).
	* Freedom K64F: Add a networking NSH configuration. (2016-07-12).
	* N25Qxx Driver: Alter the notion of 'blocksize' to be equivalent to
	  'flash write page size' in order to align with assumptions in the
	  smartfs driver (at least, maybe other things do as well).  Correct a
	  bug that was previously masked by having blocksize=eraseblocksize
	  which would cause buffer overflows and delicious hardfaults.  Trivial
	  spelling changes in comments, etc.  From ziggurat29 (2016-07-12).
	* STM32L476 Discovery: Update stm32l476 disco to include init code for
	  smartfs and nxffs for cases where those fs are included in build.
	  From ziggurat29 (2016-07-12).
	* Kinetis Ethernet and Freedom-K64F:  Freedcom-K64F PHY address was
	  wrong.  Modified Ethernet driver to try all PHY addresses and then
	  only fail if the driver cannot find a usable PHY address.  MDIO pin
	  must have an internal pull-up on the Freedom-K64F (2016-07-12).
	* Kinetis Ethernet:  Add support for CONFIG_NET_NOINTS (2016-07-12).
	* SmartFS: Fix a 32-byte memory leak.  From Ken Pettit (2016-07-12).
	* Freedom-K64F: SDHC is now enabled in the nsh configuration (but does
	  not work)Add hooks for automounter; Change NSH configuration to use
	  Windows (2016-07-13).
	* SAMV7 USBHS Device:  This change solves a problem which causes data
	  loss while sending data via USB. This problem is caused by an incorrect
	  handling of the endpoint state in the USB driver sam_usbdevhs.  This
	  leads under some circumstances to situations in which an DMA transfer
	  is setup while a previous DMA transfer is currently active. Amongst
	  other things I introduced the new endpoint state USBHS_EPSTATE_SENDING_DMA
	  for the fix.  To reproduce the problem, I used a program which send as
	  many data as possible via a CDC/ACM device and verified the received
	  data on the PC.  From Stefan Kolb (2016-07-13).
	* STM32: Fix bug in oneshot timer.  From Max Neklyudov (2016-07-13).
	* STM32L4: Port foward bugfix from stm32 of oneshot timer.  From
	  ziggurat29 (2016-07-13).
	* STM32 and EFM32: I'm using syslog through ITM. In this case
	  syslog_channel function is call before RAM initialization in
	  stm32_clockconfig. But syslog channel uses a global variable that is
	  reset to default by the RAM initialization.  From Pierre-noel
	  Bouteville (2016-07-14).
	* LPC43xx SPIFI: If CONFIG_SPIFI_SECTOR512 undefined, lpc43_bwrite
	  doesn't do actual write (probably copy/paste errors). Still not sure
	  about current state of lpc43_spifi implementation, but for me NXFFS
	  works with this patch.  From Vytautas Lukenskas (2016-07-14).
	* SMART MTD layer: Fixes freesector logic error when sectorsPerBlk=256,
	  adds DEBUGASSERT for invalid geometry and additional memory debug
	  logic.  Also fixes the dangling pointer on error bug.  From Ken
	  Pettit (2016-07-14).
	* arch/arm/src/lpc43xx: Extend LPC43xx EMC code to support SDRAM on a
	  dynamic memory interface.  From Vytautas Lukenskas (2016-07-19).
	* arch/sim/src:  Add the simulated QSPI (N25Q) flash to the simulation
	  and modify sim up_spiflash.c to enable it to run with different MTD
	  drivers based on config options (currently m25p, sst26 and w25).
	  From Ken Pettit (2016-07-19).
	* drivers/pipe:  Add support to allocating different sizes for pipe and
	  fifo buffers.  Adds mkfifo2() and pipe2() which are just like mkfifo()
	  and pipe(), but allow control of the size of the underlying, in-memory
	  circular buffer .  Move pipe() and mkpipe() to nuttx/libc, they are no
	  longer core OS interfaces.  Capability currenty used only by PTY logic
	  to support, configurable, smaller buffers for PTYs (2016-07-19).
	* include/nuttx/drivers:  Move driver-related files from include/nuttx
	  to include/nuttx/drivers.  Move driver related prototypes out of
	  include/nuttx/fs/fs.h and into new include/drivers/drivers.h
	  (2016-07-20).
	* include /nuttx/lib: Move library-related files from include/nuttx to
	  include/nuttx/lib  (2016-07-21).
	* drivers/serial/serial.c:  Fix a race condition noted by Stefan Kolb.
	  Between the test if the TX buffer is full and entering a critical
	  section, bytes may be removed from the TX buffer making the wait
	  unnecessary.  The unnecessary wait is an inefficiency, but not really
	  a problem.  But with USB CDC/ACM it can be a problem because the
	  entire TX buffer may be emptied when we lose the race.  If that
	  happens that uart_putxmitchar() can hang waiting for data to be
	  removed from an empty TX buffer (2016-07-22).
	* arch/arm/src/stm32 and stm32l4: STM32 F4/L4 RTC ALARM: were enabling
	  interrupts too early in the power-up sequence,  BEFORE the interrupt
	  system was being initialized (2016-07-23).
	* drivers/ioexpander: GPIO driver: Add support for receiving signals
	  from interrupt pins (2016-07-23).
	* drivers/usbdev: USBMSC: Add locks when removing request from queue.
	  From Wolfgang Reissnegger (2016-07-23).
	* drivers/usbdev: USBMSC: Fix reversed logic on waiting for SCSI thread
	  start.  The scsi thread was waiting for the wrong condition. However,
	  this was masked by the fact that the code creating the scsi thread was
	  also holding usbmsc_scsi_lock(priv) while initializing data, hence
	  this lock synchronized the scsi thread start with init completion.
	  From Wolfgang Reissnegger (2016-07-23).
	* arch/arm/src/sam34: SAM3/4 UDP: Fix handling of endpoint RX FIFO
	  banks.  This fixes a race condition where the HW fills a FIFO bank
	  while the SW is busy, resulting in out of sequence USB packets
	  (2016-07-23).
	* Freedom-K64F:  Add PWM support.  From Jordan MacIntyre (2016-07-25).

7.18 2016-10-08 Gregory Nutt <gnutt@nuttx.org>

	* drivers/serial/pty.c, serial.c, usbdev/cdcacm.c, include/nuttx/fs/ioctl.h:
	  Fix FIONWRITE and add FIONSPACE.  All implementations of FIONWRITE
	  were wrong.  FIONWRITE should return the number of bytes waiting in
	  the outgoing send queue, not the free space.  Rather, FIONSPACE should
	  return the free space in the send queue (2016-07-25).
	* lib_dumpbuffer:  Now prints a large on-stack buffer first to avoid
	  problems when the syslog output is prefixed with time.  From Pierre-
	  noel Bouteville (2016-07-27).
	* sched/clock and sched/sched: Add standard adjtime() interface and
	  basic timekeeping support.  Normally used with an NTP client to keep
	  system time in synchronizationi.  From Max Neklyudov (Merged on
	  20160-07-28).
	* arch/arm/src/stm32:  Add timekeeping support for the STM32 tickless
	  mode.  From Max Neklyudov (Merged on 20160-07-28).
	* Top-Level Makefiles.  Fix a chicken-and-egg problem. In the menuconfig
	  target, the context dependency was executed before kconfig-mconf.
	  That was necessary because the link at apps/platform/board needed to
	  be set up before creating the apps/Kconfig file.  Otherwise, the
	  platform Kconfig files would not be included.  But this introduces
	  the chicken-and-egg problem in some configurations.
	  In particular:  (1) An NX graphics configuration is used that requires
	  auto-generation of source files using cpp, (2) the configuration is
	  set for Linux, but (3) we are running under Cygwin with (4) a Windows
	  native toolchain.  In this case, POSIX-style symbolic links are set
	  up but the Windows native toolchain cannot follow them.
	  The reason we are running 'make menuconfig' is to change from Linux
	  to Cygwin, but the target fails.  During the context phase, NX runs
	  CPP to generate source files but that fails because the Windows native
	  toolchain cannot follow the links.  Checkmate.
	  This was fixed by changing all of the make menuconfig (and related)
	  targets.  They no longer depend on context being run.  Instead, they
	  depend only on the dirlinks target.  The dirlinks target only sets
	  up the directory links but does not try to run all of the context
	  setup; the compiler is never invoked; no code is autogeneraed; and
	  things work (2016-07-28).
	* tools/refresh.sh: Recent complexities added to apps/ means that
	  configuration needs correct Make.defs file in place in order to
	  configure properly (2016-07-28).
	* tools/kconfig2html.c: Update to handle absolute paths when sourcing
	  Kconfig files (2016-07-29).
	* libc/math: This fixes the following libc/math issues: (1) asin[f l]()
	  use Newton’s method to converge on a solution. But Newton’s method
	  converges very slowly (> 500,000 iterations) for values of x close
	  to 1.0; and, in the case of asinl(), sometimes fails to converge
	  (loops forever). The attached patch uses an trig identity for
	  values of x > sqrt(2). The resultant functions converge in no more
	  than 5 iterations, 6 for asinl().  (2) The NuttX erf[f l]() functions
	  are based on Chebyshev fitting to a good guess. The problem there’s a
	  bug in the implementation that causes the functions to blow up with x
	  near -3.0. This patch fixes that problem. It should be noted that
	  this method returns the error function erf(x) with fractional error
	  less than 1.2E-07 and that’s fine for the float version erff(), but
	  the same method is used for double and long double version which
	  will yield only slightly better precision. This patch doesn't address
	  the issue of lower precision for erf() and erfl(). (3) a faster
	  version of copysignf() for floats is included. From David S. Alessio
	  (2016-07-30).
	* I/O Expander: Remove hard-coded PCA9555 fields from ioexpander.h
	  definitons.  Add support for an attach() method that may be used when
	  any subset of pin interrupts occur (2016-07-31).
	* PCA9555 Driver:  Replace the signalling logic with a simple callback
	  using the new definitons of ioexpander.h.  This repartitioning of
	  functionality is necessary because (1) the I/O expander driver is the
	  lower-lower part of any driver that uses GPIOs (include the GPIO
	  driver itself) and should not be interacting directly with the much
	  higher level application layer.  And (2) in order to be compatible
	  with the GPIO driver (and any arbitrary upper half driver), the
	  PCA9555 should not directly signal, but should call back into the
	  upper half.  The upper half driver that interacts directly with the
	  application is the appropriate place to be generating signal
	  (2016-07-31).
	* drivers/ioexpander/skeleton.c: Add a skeleton I/O Expander driver
	  (based on the PCA9555 driver) (2016-07-31).
	* I/O Expander Interface:  Encode and extend I/O expander options to
	  include interrupt configuration (2016-07-31).
	* drivers/ioexpander: Add an (untested) TCA64XX I/O Expander driver
	  leveraged from Project Ara (2016-07-31).
	* I/O Expander Interface:  Add argument to interrupt callback.  Add a
	  method to detach the interrupt (2016-08-01).
	* drivers/ioexpander: Add a GPIO lower-half driver that can be used to
	  register a GPIO character driver for accessing pins on an I/O expander
	  (2016-08-01).
	* drivers/ioexpander: Add PCF8574 I/O Expander driver.  Some cleanup
	  also of other expander drivers (2016-08-01).
	* drivers/ioexpander: GPIO driver:  Add IOCTLs to get the pin type and
	  to unregister a signal handler (2016-08-01).
	* configs/sim: Add simulator-based test support for apps/examples/gpio
	  2016-08-01).
	* drivers/sensors:  Add KXTJ9 Accelerometer driver from the Motorola
	  Moto Z MDK (2016-08-02).
	* arch/arm/sim: Add a simulated I/O Expander driver (2016-08-03).
	* configs/sim: Add logic to set the simulated I/O expander for testing
	  with apps/examples/gpio (2016-08-03).
	* fs/fat: FAT performance improvement. In large files, seeking to a
	  position from the beginning of the file can be very time consuming.
	  ftell does lssek(fd, 0, SET_CURR).  In that case, that is wasted time
	  since we are going to seek to the same position.  This fix short-
	  circutes fat_seek() in all cases where we attempt to seek to current
	  position.  Suggested by Nate Weibley (2016-08-03).
	* tools/sethost.sh: Add sethost.sh.   This is a script that you can use
	  to quickly change the host platform from Linux to Windows/Cygwin.
	  Might save you a lot of headaches (2016-08-03).
	* arch/arm/src/tiva: Add tiva PWM lower-half driver implementation.
	  From Young  (2016-08-05).
	* drivers/spi/spi_transfer.c: Add a helper function that encapsulates
	  and manages a sequence of SPI transfers (2016-08-05).
	* drivers/spi: Add an SPI character driver that will permit access to
	  the SPI bus for testing purposes.  This driver is a simple wrapper
	  around spi_transfer() (2016-08-05).
	* drivers/wireless: Add MFRC522 RFID ISO14443 and Mifare transceiver
	  driver.  From Alan Carvalho de Assis (2016-08-06).
	* configs/stm32f103-minimum: Add board support to MFRC522 driver.  From
	  Alan Carvalho de Assis (2016-08-06).
	* arch/renesas: Rename arch/sh to arch/renesas (2016-08-06).
	* arch/arm/src/efm32, stm32, stm32l4: STM32 and EFM32 SPI drivers
	  adopted an incompatible conventions somewhere along the line.  The
	  set the number of bits to negative when calling SPI_SETBITS which had
	  the magical side-effect of setting LSB first order of bit
	  transmission.  This is not only a hokey way to pass control
	  information but is supported by no other SPI drivers.  This change
	  three things:  (1) It adds HWFEAT_LSBFIRST as a new H/W feature.
	  (2) It changes the implementations of SPI_SETBITS in the STM32 and
	  EFM32 derivers so that negated bit numbers are simply errors and it
	  adds the SPI_HWFEATURES method that can set the LSB bit order, and
	  (3) It changes all calls with negative number of bits from all
	  drivers: The number of bits is now always positive and SPI_HWFEATURES
	  is called with HWFEAT_LSBFIRST to set the bit order (2016-08-08).
	* arch/arm/src/stm32:  Add missing SPI2 and SPI3 support for STM32F3F3.
	  Add STM32F37XX DMA channel configuration.  For STM32F37XX,
	  SYSCFG_EXTICR_PORTE defined twice.  From Alan Carvalho de Assis
	  (2016-08-08).
	* arch/arm/src/stm32:  Make stm32_pwr_enablebkp thread safe.  From
	  Max Neklyudov (2016-08-09).
	* arch/arm/src/stm32: SAM3/4 GPIO: Enable peripheral clock for GPIO port
	  when GPIO is configured as input. The value of a GPIO input is only
	  sampled when the peripheral clock for the port controller the GPIO
	  resides in is enabled. Therefore we need to enable the clock even when
	  polling a GPIO.  From Wolfgang Reissnegger (2016-08-09).
	* arch/arm/src/tiva: Fix two bugs of tiva pwm lower-half driver
	  implementation. From Young (2016-08-10).
	* sched/group: Explicitly initialize the group tg_exitsem with
	  sem_init().  The existing logic worked because the correct
	  initialization value is all zero, but it is better to initialize the
	  semaphore explicitly (2016-08-10).
	* arch/arm/stm32: Fix bad pllmul values for STM32F1XX connectivity line.
	  STM32F1XX connectivity line supports only x4, x5, x6, x7, x8, x9 and
	  x6.5 values. From Michał �yszczek (2016-08-11).
	* include/nuttx/timers: Add oneshot timer lower half interface
	  (2016-08-11).
	* arch/arm/src/stm32: Add a experimental oneshot, lower-half driver for
	  STM32 (2016-08-11).
	* arch/arm/src/samv7: Add option to support oneshot timer without free-
	  running timer.  Add oneshot lower half driver (2016-08-11).
	* arch/arm/src/sama5: Add option to support oneshot timer without free-
	  running timer.  Add oneshot lower half driver (2016-08-11).
	* arch/arm/src/sam34: SAM4CM: Add option to support oneshot timer without
	  free-running timer.  Add oneshot lower half driver (2016-08-11).
	* arch/arm/src/stm32l4: Add oneshot lower half driver (2016-08-11).
	* libc/stdlib: strtod() was not returning endptr on error conditions
	  (2016-08-11).
	* libc/math: floor(), floorf(), and floorl(): Fix logic error.  Was not
	  correctly handling negative integral value (2016-08-11).
	* configs/sim: Add a configuration useful for testing Mini Basic
	  (2016-08-12).
	* drivers/timers: Add an upper-half, oneshot timer character driver
	  (2016-08-12).
	* arch/sim/src: Add a simulated oneshot lowerhalf driver (2016-08-12).
	* arch/arm/src/stm32: STM32F3 SPI:  Fix the number of bit setting for
	  the F3.  That and data packing work differently on the STM32F3 than
	  for other STM32 parts (2016-08-12).
	* arch/arm/stm32 and stm32l4: Enabling SPI DMA loses other bits in CR2
	  (2016-08-13).
	* arch/arm/src/stm32: STM32F3 SPI:  Cannot write always 16-bit value to
	  DR register because of how the F3 implements data packing (2016-08-13).
	* Kinetis: Add support for I2C and RTC.  From v01d (phreakuencies)
	  (2016-08-13).
	* teensy 3.x i2c.  From v01d (phreakuencies) (2016-08-13).
	* SH1106 0.96 OLED module support (SSD1306 compatible) + I2C fixes.
	  From v01d (phreakuencies) (2016-08-13).
	* Add support for SAMV7 DACC module.  From iotr Mienkowski (2016-08-15).
	* Add oneshot board initialization to stm32f103-minimum.  From Alan
	  Carvalho de Assis (2016-08-15).
	* drivers/audio/tone.c: Add Audio Tone Generator for NuttX.  From Alan
	  Carvalho de Assis (2016-08-16).
	* configs/stm32f103-minimum: Add board configuration to initialize Audio
	  Tone Generator.  From Alan Carvalho de Assis (2016-08-16).
	* STM32F411 and STM32F446 map i2c2_sda_4 to different alternate function
	  numbers.  From Konstantin Berezenko (2016-08-17).
	* STM32 DMA Fix: Change stm32 adc dma callback to send channel number
	  instead of index.  From Konstantin Berezenko (2016-08-17).
	* SAMA5:  Add missing oneshot max_delay method (2016-08-18).
	* configs/stm32bufferfly2: Add support for the Kamami stm32butterfly2
	  development board with optional ETH phy.  From  Michał �yszczek
	  (2016-08-19).
	* libc/misc: Separate XorShift128 PRNG from /dev/urandom and make it
	  generally available (2016-08-20).
	* sched/sched_cpuload_oneshot:  Use the oneshot timer with optional
	  entropy to measure cPU load if so configured (2016-08-20).
	* drivers/usbhost/usbhost_composite.c: An an EXPERIMENTAL prototype of
	  how USB host support for composite devices might be implemented.  This
	  feature is EXPERIMENTAL because (1) it is untested and (2) has some
	  know design issues that must be addressed before it can be of use
	  (2016-08-28).
	* CXXFLAGS:  Add -fcheck-new whenever -fno-exceptions is used.  From Beat
	  Küng (2016-08-23).
	* tools/mkfsdata.pl was still generating the old-style apps/include
	  inclusion paths (2016-08-23).
	* drivers/sensors:  Add drvier for the LIS3MDL 3 axis magnetometer. From
	  Alexander Entinger (2016-08-23).
	* drivers/sensors: Add driver for the  MLX90393 3 axis magnetometer.
	  From Alexander Entinger (2016-08-23).
	* drivers/mtd: Add Fujistu MB85RS256B ramtron support.  From Beat Küng
	  (2016-08-23).
	* drivers/sensors: Add driver for the LIS3DSH 3 axis accelerometer. From
	  Alexander Entinger (2016-08-24).
	* drivers/sensors: Add driver for the Bosch BMG160 3 axis gyroscope.
	  From Alexander Entinger (2016-08-24).
	* STM32: Add IAR-style STM32F1xx vectors. Tested on STM32F103RB and
	  STM32F107RC.  From Aleksandr Vyhovanec (2016-08-24).
	* libc/header files: Add POSIX type sig_atomic_t.  From Sebastien
	  Lorquet (2016-08-24).
	* libc/header files: isatty() should be prototypes in unstid.h, not
	  termios.h.  From Sebastien Lorquet (2016-08-24).
	* Documentation:  Update to NuttX C coding style document with additions
	  discussing long comments on the right side of a statement or data
	  definition (2016-08-24).
	* LPC43xx serial: Fix typos in LPC43 serial driver.  Found by Vytautas
	  Lukenskas (2016-08-24).
	* libc/time: This commit adds the difftime() function.  The function
	  depends on the toolchain-dependent CONFIG_HAVE_DOUBLE so is not
	  available on tiny platforms.  From Sebastien Lorquet (2016-08-24).
	* libc/stdio: Add support for remove().  From Sebastien Lorquet
	  (2016-08-25).
	* STM32 OTGFS device: Fix for lost first word from FIFO

	    1) Do not overwrite Reserved Bits in GINTSTS (per ref manual)*
	    2) Acknowledge all pending int on entry to ISR that are Only rc_w1*
	    3) Do not disable RXFVL*
	    4) Loop until RXFVL is cleared*
	    5) Only clear the NAK on the endpoint on the
	       OTGFS_GRXSTSD_PKTSTS_SETUPDONE to not loose the first WORD of
	      FIFO all the data  (Bug Fix)

	  Changed marked *are just driver clean up and ensure ints are not lost.
	  The bug fix is #5

	  Test case open putty and observer the Set/Get LineCoding. Without this
	  fix #5 the Get will not match the Set, and in fact the data might be
	  skewed by 4 bytes, that are lost from the FIFO if the
	  OTGFS_DOEPCTL0_CNAK bit is set in the OTGFS_GRXSTSD_PKTSTS_SETUPRECVD
	  as opposed to the OTGFS_GRXSTSD_PKTSTS_SETUPDONE

	    Set Line Coding DATA1: 4B | 00 c2 01 00 00 00 08 | c8 1B
	    Get Line Coding DATA1: 4B | .. .. .. .. 00 00 08   c8 .. 00 00 07 | 7a 72

	  From David Sidrane (2016-08-25).
	* Add system() to stdlib.h.  Actual implementation is in
	  apps/system/system (2016-08-25).
	* include/nuttx/input: Add missing prototype for btn_lower_initialize()
	  (2016-08-27).
	* configs/stm32f103-minimum: Add board config support to SPI LCD module
	  JLX12864G-086.  From Alan Carvalho de Assis (2016-08-28).
	* net/tcp:  tcp_ipvX_bind() not actually using the ported selected with
	  port==0.  Also removes duplicate call to pkt_input().  Issues noted by
	  Pascal Speck (2016-08-30).
	* STM32 F7: Remove duplicate call to pkt_input from Ethernet driver.
	  Issues noted by Pascal Speck (2016-08-30).
	* STM32L4 OTGFS device: Apply stm32 fix to stm32l4.  From Sebastien
	  Lorquet (2016-08-31).
	* drivers/contactless:  Remove contactless drivers from drivers/wireless
	  to drivers contactless.  From Sebastien Lorquet (2016-08-31).
	* USB host composite is at least partially functional. No longer depends
	  on CONFIG_EXPERIMENTAL (2016-09-02).
	* MTD: Fixed cloned typos in several FLASH drivers.  From Aleksandr
	  Vyhovanec (2016-09-02).
	* MTD: SPI-based driver for Macronix MX25L3233F or MX25L6433F.  From
	  Aleksandr Vyhovanec (2016-09-02).
	* sched/: The TCB nchildren field should not be incremented when
	  pthreads are created (2016-09-06).
	* sched/: Move fields related to parent/child task relationship out of
	  TCB into group structure (2016-09-06).
	* STM32L4: Add support for USART3-USART5.  For STM32L4 parts, the higher
	  number USART ports supported varies.  Add the HAVE_USARTx definitions
	  to the configuration to allow enabling the higher numbered USART ports.
	  From Jim Wylder (2016-09-15).
	* configs/stm32l476-mdk: Support basic booting and nsh on Motorola MDK.
	  The Motorola MDK is based off of an earlier version of NuttX.  This
	  only provides a basic NSH shell.  From Jim Wylder (2016-09-15).
	* STM32 USB: Set USB address to avoid a failed assertion.  From Pierre-noel
	  Bouteville (2016-09-15).
	* STM32 L4 and L7 USB: Pierre's assertion-avoidance change should also be
	  applied to STM32 F7 and L4 (2016-09-15).
	* sched/: mq_send() was not setting the errno value on certain failures
	  to allocate a message (2016-09-15).
	* include/nuttx/modem:  Move all modem-related IOCTL commands to a common
	  file to assure that they will be unique (2016-09-16).
	* STM32 F4 Discovery:  Add support for XEN1210 3D-board.  From Alan
	  Carvalho de Assis (2016-09-17).
	* drivers/sensors: Adds support for the  Sensixs XEN1210 3D-board.  This
	  sensor is used on NANOSATC-BR2 a Brazillian CUBESAT project.  From
	  Alan Carvalho de Assis (2016-09-16).
	* include/analog/dac.h: Make DAC structure packed.  From Marc Rechté
	  (2016-09-20).
	* All SAM Ethernet Drivers: Add support so that the drivers can be built
	  with CONFIG_NET_MULTIBUFFER=y (2016-09-20).
	* Tiva Ethernet:  Needs support for CONFIG_NET_MULTIBUFFER=y (2016-09-20).
	* drivers/net: NET_TUN=y => NET_MULTIBUFFER=y.  From Vladimir
	  Komendantskiy (2016-09-20).
	* SAM3/4: Fix GPIO pull-up/down code. Enabling the pull-down resistor
	  while the pull-up resistor is still enabled is not possible. In this
	  case, the write of PIO_PPDER for the relevant I/O line is discarded.
	  Likewise, enabling the pull-up resistor while the pull-down resistor
	  is still enabled is not possible. In this case, the write of PIO_PUER
	  for the relevant I/O line is discarded.  From Wolfgang Reißnegger
	  (2016-09-20).
	* SAM GPIO: Apply Wolfgang's change for SAM3/4 to SAMA5 and SAMV7
	  (2016-09-20).
	* Tiva QEI: Add QEI lower-half driver impl. for Tiva series chip.  From
	  Young (2016-09-21).
	* STM32, L4, and F7: Remove GPIO_ETH_RMII_TX_CLK. TX_CLK is not present
	  in RMII. Mateusz Szafoni (2016-09-22).
	* sched/: Define 'group' even if HAVE_GROUPID is not set.  From Mateusz
	  Szafoni (2016-09-22).
	* sched/: vector table should have dimension NR_IRQS, not NR_IRQS+1.
	  From Sagitta Li (2016-09-22).
	* fs/mount: Corrects a bad assertion noted by Pierre-noel Bouteville.
	  Also fixes a reference counting problem in an error condition:  When
	  the mountpoint inode is found but is not an appropriate mountpoint,
	  the reference count on the inode was not being decremented (2016-09-22).
	* libnx/nxglib: Fix handling of near-horizontal lines of width 1 in
	  nxgl_splitline().  Missing handling for degenerate condition caused
	  width 1 lines such as (0, 0) - (100, 10) to have gaps in the drawing.
	  From Petteri Aimonen (2016-09-22).
	* drivers/net/slip.c: Fix calculations using MSEC_PER_TICK.  If
	  USEC_PER_TICK is less than 1000, then MSEC_PER_TICK will be zero.  It
	  will be inaccurate in any case (2016-09-25).
	* Tiva QEI: Add a new ioctl command (set MAXPOS) for tiva QEI.  From
	  Young (2016-09-26).
	* LPC43xx Serial: There are some small problems in LPC43xx RS485 mode
	  configuration. In particular: (1) UART0,2,3 do not have DTR pins
	  (different from UART1), so, Kconfig needs to be adjusted. (2)
	  lpc43_uart.c in RS485 mode only configures DIR pin, but doesn't enable
	  pin output for UART0,2,3. (3) should be option to reverse DIR control
	  pin output polarity. (4) lpc43xx/chip/lpc43_uart.h doesn't have USART3
	  definitions.  NOTE: I didn't modified and didn't tested USART1, as it
	  has different hardware.  From Vytautas Lukenskas.  From Vytautas
	  Lukenskas (2016-09-30).
	* STM32 Ethernet: Correct typo in conditional logic.  From Neil Hancock
	  (2016-10-01).
	* sched/pthread and task:  When a pthread is started, there is a small
	  bit of logic that will run on the thread of execution of the new
	  pthread.  In the case where the new pthread has a lower priority than
	  the parent thread, then this could cause both the parent thread and
	  the new pthread to be blocked at the priority of the lower priority
	  pthread (assuming that CONFIG_PRIORITY_INHERITANCE is not selected).
	  This change temporarily boosts the priority of the new pthread to at
	  least the priority of the new pthread to at least the priority of the
	  parent thread.  When that bit of logic has executed on the thread of
	  execution of the new pthread, it will then drop to the correct
	  priority (if necessary) before calling into the new pthread's entry
	  point (2016-10-01).
	* configs/stm32f103-minimum: Add stm32_bringup support and userled
	  example to STM32F103 Minimum board.  From Alan Carvalho de Assis
	  (2016-10-02).
	* STM32 L4: Add support for quadrature encoders on STM32L4. Sebastien
	  Lorquet (2016-10-02).
	* configs: Add support for qencoders on various nucleo boards.  From
	  Sebastien Lorquet (2016-10-03).
	* STM32 L4 USB Device: Fixed L4 USB Driver by avoiding SETUPDONE and
	  EPOUT_SETUP.  From David Sidrane (2016-10-04).
	* configs/olimex-stm32-e407: Add some networking configurations.  From
	  Mateusz Szafoni (2016-10-06).
	* STM32 SPI: stm32_modifycr2 should be available on all platforms if DMA
	  is enabled. (2016-10-06).
	* STM32 DMA2D:  Fix an error in up_dma2dcreatelayer where an invalid
	  pointer was returned when a certain underlying function failed.  From
	  Jens Gräf (2016-10-07).

7.19 2016-12-26 Gregory Nutt <gnutt@nuttx.org>

	* include/nuttx/fs/nxffs.h: Needs forward reference to struct mtd_dev_s
	  and needs to include stdbool.h (2016-10-09).
	* STM32F103 Minimum: Note in Kconfig that the board supports buttons.
	  From Alan Carvalho de Assis (2016-10-11).
	* STM32F103 Minimum: Add button support.   From Alan Carvalho de Assis
	  (2016-10-11).
	* arch/arm/kinetis and configs/freedom-k64f: Add UID Unique ID.  From
	  Neil Hancock (2016-10-13).
	* arch/arm/src/stm32l4: (1) too many parentheses when calculating max
	  chan count and (2) channel 4 does not have a complementary output. From
	  Sebastien Lorquet (2016-10-14).
	* arch/arm/src/stm32l4: Support Complementary PWM outputs on STM32L4.
	  From Sebastien Lorquet (2016-10-14).
	* Support PWM testing on board nucleo-l476.  From Sebastien Lorquet
	  (2016-10-14).
	* arch/arm/src/stm32: Support oversampling by 8 for the STM32 F4.
	  From David Sidrane (2016-10-15).
	* libc/stdio: Fixes sscanf %sn where strlen(data) < n.  From David
	  Sidrane (2016-10-15).
	* arch/risc-v: Add support for the RISC-V architecture and
	  configs/nr5m100-nexys4 board.  I will be making the FPGA code for
	  this available soon (within a week I would say).  The board support on
	  this is pretty thin, but it seems like maybe a good idea to get the base
	  RISC-V stuff in since there are people interested in it.  From Ken
	  Pettit (2016-10-16).
	* C library:  Add a dummy setlocale() function to avoid drawing the
	  function from newlib (2016-10-17).
	* libc/wchar: Add wcslen, wmemchr, wmemcmp, wmemcpy and wmemset to NuttX.
	  From Alan Carvalho de Assis (2016-10-17).
	* syscalls: Add setlocale to libc.csv (2016-10-17).
	* libc/locale: Add clocale header file (2016-10-18).
	* libc/wchar:  Add functions btowc, mbrtowc, mbtowc, wcscmp, wcscoll,
	  wmemmove.  From Alan Carvalho de Assis (2016-10-18).
	* usbhost/enumerate:  Fix possible buffer overwrite.  From Janne Rosberg
	  (2016-10-18).
	* configs/Board.mk: Add extra clean operations (2016-10-18).
	* usbhost/composite:  Fix compile; missing semicolons.  From Jann
	  Rosberg (2016-10-18).
	* libc/stdio: Include wchar.h in lib_libvsprintf.c to fix compilation
	  error.  From Alan Carvalho de Assis (2016-10-18).
	* arch/arm/src/kinetis: Added missing headers.  From David Sidrane
	  (2016-10-18).
	* arch/arm/src/kinetis: Kinetis broke out SPI to kinetis/kinetis_spi.h.
	  From David Sidrane (2016-10-18).
	* arch/arm/src/kinetis: Broke out DMA to use the modern Nuttx chip
	  inclusion - still STUBS.  From David Sidrane (2016-10-18).
	* arch/arm/src/kinetis: Kinetis Support ARMV7 Common Vector and FPU.
	  From David Sidrane (2016-10-18).
	* arch/arm/src/kinetis: Kinetis Allow CONFIG_ARMV7M_CMNVECTOR,
	  CONFIG_STACK_COLORATION, CONFIG_ARCH_FPU.  From David Sidrane
	  (2016-10-18).
	* arch/arm/src/kinetis: Kinetis i2c driver offset swapped for value
	  in kinetis_i2c_putreg.  From David Sidrane (2016-10-18).
	* Add functions wcrtomb, wcslcpy, wcsxfrm, wctob, wctomb, wctype,
	  localeconv, strcoll, strxfrm. From Alan Carvalho de Assis
	  (2016-10-18).
	* libc/wctype: Add wctype.h; Move lib_wctype.c to libc/wctype.
	  From Alan Carvalho de Assis (2016-10-18).
	* include/: Modify locale.h to add localeconv() and lconv structure.
	  From Alan Carvalho de Assis (2016-10-18).
	* include/sys/time.h: timersub macro modified per recommendations of
	  phreakuencies (2016-10-18).
	* include/: Add isblank() macro to ctype.h.  From Alan Carvalho de
	  Assis (2016-10-19).
	* libc/wctype: Add iswctype, towlower, towupper and wcsftime functions.
	  From Alan Carvalho de Assis (2016-10-19).
	* syslog: Fixes required for file syslog output.  From Max Kriegleder
	  (2016-10-19).
	* arch/arm/src/stm32:  Add TIM8 to STM32F103V pinmap.  From Maciej Wójcik
	  (2016-10-19).
	* libc/locale: Allows c++ code to compile with or without
	  CONFIG_LIBC_LOCALE and will generate a link error if CONFIG_LIBC_LOCALE
	  is not defined and setlocale is referenced. With CONFIG_LIBC_LOCALE
	  defined setlocale will act as if MB string is not supported and return
	  "C" for POSIX. C and "". From David Sidrane (2016-10-19).
	* Xtensa ESP32: Add vectors for interrupt levels 2-6 (2016-10-20).
	* strtof():  Add strtof() as simply a copy of strtod with types and
	  limits changed (2016-10-20).
	* arch/arm/src/stm32v7:  Register the watchdog device at the configured
	  device path CONFIG_WATCHDOG_DEVPATH vs. hard-coded /dev/wdt.  From Frank
	  Benkert (2016-10-21).
	* configs/*/defconfig: The buttons example was changed to archbuttons.  As
	  a result all of the button configurations are broken and need some
	  renaming in the defconfig files.  Noted by Frank Berkert (2016-10-21).
	* configs/stm32f103-minimum: Add support to PWM on STM32F103-Minimum
	  board.  From Alan Carvalho de Assis (2016-10-21).
	* include/ctype.h and cxx/cctype: Implement ctype.h functions as inline
	  if possible.  cctype can then properly select namespace (2016-10-22).
	* libc/unisted: Add strtold() (2016-10-22).
	* sscanf:  Use strtof() instead of strtod() if a short floating point
	  value was requested.  The should help performance with MCUs with 32-bit
	  FPU support with some additional code size (2016-10-22).
	* Remove support for software prioritization of interrupts (2016-10-23).
	* drivers/net/tun.c: Fix bug in TUN interface driver.  From  Max
	  Nekludov (2016-10-24).
	* arch/arm/src/stm32: A new implementation of the STM32 F4 I2C bottom
	  half.  The commin I2C as this did not handled correctly in the current
	  implementation (see also https://github.com/PX4/NuttX/issues/54).  The
	  changes almost exclusively affect the ISR.  From Max Kriegleder
	  (2016-10-24).
	* arch/arm/src/stm32l4: Fix I2C devices RCC registers.  From Sebastien
	  Lorquet (2016-10-25).
	* arch/arm/src/stm32l4: Enable and renames for 32l4 UARTs 4 and 5.
	  From Sebastien Lorquet (2016-10-25).
	* configs/stm32f103-minimum: Fix Timers 2 to 7 clock frequencies.
	  From Alan Carvalho de Assis (2016-10-25).
	* arch/arm/src/stm32: Initial implemention of the STM32 F37xx SDADC
	  module. There are also changes to ADC, DAC modules. SDADC has only been
	  tested in DMA mode and does not support external TIMER triggers. This
	  is a work in progress.  From  Marc Rechté (2016-10-25).
	* Add logic to attach peripheral interrupt sources to CPU interrupts
	  (2016-10-25).
	* CHxN channels are always outputs.  From Sebastien Lorquet
	  (2016-10-26).
	* sched/semaphore: Within the OS, when a thread obtains a semaphore
	  count it must call sem_addholder() if CONFIG_PRIORITY_INHERITANCE is
	  enabled.  If a count is available, then sem_wait() calls
	  sem_addholder(), otherwise it waited for the semaphore and called
	  sem_addholder() when it eventually received the count.

	  This caused a problem when the thread calling sem_wait() was very
	  low priority.  When it received the count, there may be higher
	  priority threads "hogging" the CPU that prevent the lower priority
	  task from running and, as a result, the sem_addholder() may be
	  elayed indefinitely.

	  The fix was to have sem_post() call sem_addholder() just before
	  restarting the thread waiting for the semaphore count.

	  This problem was noted by Benix Vincent who also suggested the
	  solution (2016-10-26).
	* configs/stm32f103-minimum: Add RGB LED support on STM32F103 Minimum
	  board.  From Alan Carvalho de Assis (2016-10-26).
	* arch/arm/src/stm32f7: stm32_i2c.c Dejavu.  Fixes a bug previously
	  found in the F4. From David Sidrane (2016-10-26).
	* arch/arm/src/stm32f7: stm32f76xx77xx_pinmap.h Missed one.  From
	  David Sidrane (2016-10-26).
	* LPC43xx serial: Fix a typo in ioctl TIOCSRS485 ioctl.  From Vytautas
	  Lukenskas (2016-10-27).
	* sched/clock: Correct clock initialization.  The correct range for
	  the month is 0-11 but is entered as 1-12 in the .config file
	  (2016-10-27).
	* arch/*/include: Add architecture-specific inttypes.h.  From Paul
	  A. Patience (2016-10-27).
	* sched/Kconfig:  Add ranges to START_YEAR, MONTH, and DAY (2016-10-28).
	* configs/nucleo-f303re: Add STM32 F303RE hello configuration; remove
	  duplicate setting from board.h.   From  Marc Rechté (2016-10-18).
	* arch/arm/src/lpc43xx: Restore RS485 mode on serial port open (if
	  RS485 is enabled via menuconfig).  From Vytautas Lukenskas (2016-10-28).
	* arch/arm/src/stm32f7:  otgdev fixed typo.  From David Sidrane
	  (2016-10-28).
	* arch/xtensa: Basic architectural support for Xtensa processors and
	  the Expressif. ESP32 added.  Totally untested on initial release
	  (2016-10-31).
	* configs/esp32-core: Basic support for Expressif ESP32 Core v2 board
	  added.  The initial release includes an NSH and an SMP test
	  configuration.  Totally untested on initial relesae (2016-10-31).
	* configs/bambino-200e: Add basic support to Micromint Bambino 200E
	  board.  This includes contributions from Jim Wolfman.  From Alan
	  Carvalho de Assis (2016-11-01).
	* drivers/mtd/at24xx.c: Added EEPROM timeout.  Fromo Aleksandr
	  Vyhovanec (2016-11-02).
	* arch/misoc:  Adds basic support for the Misoc procoessors and the
	  LM32 in particular.  From Ramtin Amin (2016-11-01).
	* configs/misoc.  Board support for testing Misoc LM32 with Qemu.
	  From Ramtin Amin (2016-11-01).
	* arch/arm/src/stm32: I think, that Size is (highest address+1 - Base
	  address).  Base address has been removed and if address+count >= size
	  we are outside of the Flash.  From David Sidrane (2016-11-01).
	* sched/semaphore, sched/phread/, libc/semaphore, libc/pthread: Add
	  pthread_mutexattr_get/set_protocol and non-standard sem_get/set_protocol.
	  These may use to enable or disable priority inheritance on a single
	  semaphore (2016-11-02).
	* arch/arm/src/stm32:  Fix ADC compilation error when DMA isn't enabled.
	  From Paul A. Patience (2016-11-02).
	* drivers/ and drivers/spi: Fix Kconfig warning.  This commit moves the
	  ARCH_HAVE_SPI options outside the check for SPI.  Those options don't
	  depend on SPI, and Kconfig files  in arch/ enable them even if SPI
	  isn't  enabled.  Source the driver's Kconfig in drivers/Kconfig only
	  if support for the driver is enabled prevents us from defining these
	  ARCH_HAVE options in the driver's Kconfig. We should probably remove
	  the other checks in drivers/Kconfig and check if the drivers are
	  enabled only in their Kconfig.  From Paul A. Patience (2016-11-02).
	* Move protoypes for the non-standard include/semaphore.h file to the
	  non-standard include/nuttx/semaphore.h with the other non-standard
	  semaphore interfaces (2016-11-02).
	* include/semaphores.h: Provide macros for sem_setprotocol() and
	  sem_getprotocol() if priority inheritance is not enabled.  More
	  SEM_PRIO_* definitions to include/nuttx/semaphore.h (2016-11-02).
	* drivers/serial.c: Make sure that priority inheritance is not
	  enabled for the signaling semaphores used in the serial driver
	  (2016-11-03).
	* arch/arm/src/stm32f7: Fix to SPI-Master driver.  Without this the
	  chip select decoding feature will not work properly.  From Michael
	  Spahlinger (2016-11-03).
	* drivers/, net/, fs/, sched, arch/, graphics/, libnx,: Disable
	  priority inheritance on all semaphores used for signaling (2016-11-03).
	* sched/semaphore:   Handle a case of missing proxy for sem_setprotocol.
	  Reorder so that (1) this error is avoided, and (2) >No proxy is needed
	  if priority inheritance is not enabled (2016-11-03).
	* config/*/defconfgs: More fallout from name change of
	  apps/examples/buttons to archbuttons (2016-11-03).
	* configs/nucleo_f303re: Various fixes to get the adc configuration
	  building again after PR.  Refresh all configurations (2016-11-03).
	* arch/misoc/src/common:  Add interrupting Misoc serial driver.  From
	  Ramtin Amin (2016-11-04)
	* Fix a number of header files with mismatched 'extern C {' and '}'
	  (2016-11-05).
	* Provide do-nothing stubs for mutex attribute interfaces if features
	  ot enabled.  pthread_cond includes a signaling semaphore and should
	  call sem_setprotocol (2016-11-05).
	* arch/arm/src/armv7-r:  Fix compilation error.  This commit fixes
	  compilation errors on MPU support for ARMv7-R.  From Heesub Shin
	  (2016-11-06).
	* arch/arm/src/armv7-r:  Fix invalid drbar handling.  In ARMv7-R,
	  [31:5] bits of DRBAR is physical base address and other bits are
	  reserved and SBZ. Thus, there is no point in passing other than the
	  base address.  From Heesub Shin (2016-11-06).
	* arch/arm/src/armv7-r:  Remove the redundant update on SCTLR.
	  mpu_control() is invoking cp15_wrsctlr() around SCTLR update
	  redundantly.  From Heesub Shin (2016-11-06).
	* arch/arm/src/armv7-r:  Add new Kconfig entries for d/i-cache.
	  Unlike in ARMv7-A/M, Kconfig entries for data and instruction caches
	  are currently missing in ARMv7-R. This commit adds those missing
	  Kconfig entries. Actual implmenetation for those functions will be
	  added in the subsequent patches.  From Heesub Shin (2016-11-06).
	* arch/arm/src/armv7-r:  Add cache handling functions.  This commit
	  adds functions for enabling and disabling d/i-caches which were
	  missing for ARMv7-R.  From Heesub Shin (2016-11-06).
	* arch/arm/src/armv7-r:  Fix typo in mpu support.  s/ARMV7M/ARMV7R/g.
	  From Heesub Shin (2016-11-06).
	* arch/arm/src/armv7-r:  Fix CPSR corruption after exception handling.
	  A sporadic hang with consequent crash was observed when booting. It
	  seemed to be caused by the corrupted or wrong CPSR restored on return
	  from exception. NuttX restores the context using code like this:

	      msr spsr, r1

	  GCC translates this to:

	      msr spsr_fc, r1

	  As a result, not all SPSR fields are updated on exception return.
	  This should be:

	      msr spsr_fsxc, r1

	  On some evaluation boards, spsr_svc may have totally invalid value at
	  power-on-reset. As it is not initialized at boot, the code above may
	  result in the corruption of cpsr and thus unexpected behavior.

	  From Heesub Shin (2016-11-06).
	* arch/arm/src/armv7-r:  Fix to restore the Thumb flag in CPSR.  Thumb
	  flag in CPSR is not restored back when the context switch occurs while
	  executing thumb instruction.  From Heesub Shin (2016-11-06).
	* sched/wqueue:  When queuing new LP work, don't signal any threads
	  if they are all busy.  From Heesub Shin (2016-11-06).
	* sched/wqueue: Signal sent from work_signal() may interrupt the low
	  priority worker thread that is already running. For example, the worker
	  thread that is waiting for a semaphore could be woken up by the signal
	  and break any synchronization assumption as a result. It also does not
	  make any sense to send signal if it is already running and busy. This
	  commit fixes it.  From Heesub Shin (2016-11-06).
	* arch/arm/src/stm32f7: STM32F7 SD/MMC driver depends on
	  CONFIG_SDIO_DMA which is only defined in stm32/Kconfig.  Changed to
	  CONFIG_STM32F7_SDMMC_DMA and defined in stm32f7/Kconfig (2016-11-07).
	* arch/arm/src/stm32: Add PWM driver support for STMF37xx.  The
	  changes have been tested successfuly for TIM4 and TIM17 (different
	  IPs).  From  Marc Rechté (2016-11-07).
	* sched/semaphore:  sem_trywait() no longer modifies the errno value
	  UNLESS an error occurs.  This allows these functions to be used
	  internally without clobbering the errno value.  From Freddie Chopin
	  (2016-11-09).
	* arch/arm/src/stm32l4: Change the way to configure quadrature encoder
	  prescalers.  From Sebastien Lorquet (2016-11-09).
	* libc/unisted: Patch brings strtol() and related functions more
	  conformant with POSIX.  Corner cases like strtol(-2147483648, NULL, 10)
	  now pass clang -fsanitize=integer without warnings.  From Juha Niskanen
	  (2016-11-10).
	* drivers/sensors and configs/stm32f103-minimum: Add Vishay VEML6070
	  driver and support for STM32F103-Minimum board.  From   From Alan
	  Carvalho de Assis(2016-11-13).
	* Misoc LM32: Corrects a bug that never occured in qemu on simulation or
	  real fpga. The error was that the r1 register was being modified out of
	  context switching and not restoring it.  From Ramtin Amin (2016-11-14)
	* arch/arm/src/samv71: A problem occurred with the SAMV7 USBDEVHS driver
	  if the USB cable is unplugged while a large amount of data is send over
	  an IN endpoint using DMA. If the USB cable is plugged in again after a
	  few seconds it is not possible to send data over this IN endpoint again,
	  all other endpoints work as expected.

	  The problem occurs because if the USB cable is unplugged while an DMA
	  transfer is in flight the transfer is canceled but the register
	  SAM_USBHS_DEVDMACTRL is left in an undefined state.  The problem was
	  fixed the problem by resetting the register SAM_USBHS_DEVDMACTRL to a
	  known state. Additionally all pending interrupts are cleared.

	  From Stefan Kolb (2016-11-14).
	* configs/esp32-core: ESP32 Core v2: Add configuration to supporting
	  linking NuttX for execution out of IRAM (2016-11-14).
	* libc/unistd: sleep() was returning remaining nanoseconds (kind of),
	  instead the remaining seconds.  From Eunbong Song (2016-11-15).
	* sched/irq:  Fixes for the SMP case: (1) Change order for SMP case in
	  enter_critical_section:  (1) Disable local interrupts BEFORE taking
	  spinlock and (2) If SMP is enabled, if any interrupt handler calls
	  enter_critical_section(), it should take the spinlock. (2016-11-15).
	* arch/xtensa: Add EXPERIMENTAL hooks to support lazy Xtensa co-
	  processor state restore in the future (2016-11-16).
	* Add some experimental changes to enter/leave_critical_section to
	  deal with the case where interrupts are disabled only on the local
	  CPU (2016-11-16).
	* sched/irq:  Add logic to handled nested calls to
	  enter_critical_section() from interrupts handlers (with SMP)
	  (2016-11-16).
	* drivers/timer:  Remove the timer driver TIOC_SETHANDLER IOCTL call.
	  This calls directly from the timer driver into application code.  That
	  is non-standard, non-portable, and cannot be supported (2016-11-17).
	*drivers/timer:  Add timer driver hooks to support signal notification
	  of timer expiration.  Commented out because invasive interface changes
	  would also be required to complete the implementation (2016-11-17).
	* arch/arm/src/armv7-m: Fix double allocation of MPU region in mmu.h
	  (2016-11-17).
	* timer driver: Use signal to notify of timer expiration. Add generic
	  argument so that there can be additional usage.  From Sebastien Lorquet
	  (2016-11-17).
	* All timer lower half drivers.  Port Sebastien's changes to all all
	  other implementations of the timer lower half.  Many changes and
	  untested.  Expect some problems. (2016-11-17).
	* sched/irq: irq_csection() has a bad assumption in the SMP case.  It
	  assumed that the state of certain variables.  That was true on entry
	  into the interrupt handler, but might change to the execution of logic
	  within the interrupt handler (2016-11-18).
	* config/ nucleo-l476rg: Add support for timers to nucleo l476.  From
	  Sebastien Lorquet (2016-11-18).
	* drivers/net:  Add option to use low-priority work queue to all drivers
	  in drivers/net.  Not yet added to all architecture-specific network
	  drivers (2016-11-18).
	* sched/wdog: Most interrupt handling logic interacts with tasks via
	  standard mechanism such as sem_post, sigqueue, mq_send, etc.  These all
	  call enter_critical_section and are assumed to be safe in the SMP case.

	  But certain logic interacts with tasks in different ways.  The only one
	  that comes to mind are wdogs.  There is a tasking interface that to
	  manipulate wdogs, and a different interface in the timer interrupt
	  handling logic to manage wdog expirations.

	  In the normal case, this is fine.  Since the tasking level code calls
	  enter_critical_section, interrupts are disabled an no conflicts can
	  occur.  But that may not be the case in the SMP case.  Most
	  architectures do not permit disabling interrupts on other CPUs so
	  enter_critical_section must work differently:  Locks are required to
	  protect code.

	  So this change adds locking (via enter_critical section) to wdog
	  expiration logic for the case if the SMP configuration
	  (2016-11-18).
	* SAM3/4: Add delay between setting and clearing the endpoint RESET bit
	  in sam_ep_resume().  We need to add a delay between setting and
	  clearing the endpoint reset bit in SAM_UDP_RSTEP. Without the delay the
	  USB controller will (may?) not reset the endpoint.  If the endpoint is
	  not being reset, the Data Toggle (DTGLE) bit will not to be cleared
	  which will cause the next transaction to fail if DTGLE is 1. If that
	  happens the host will time-out and reset the bus.  Adding this delay
	  may also fix the USBMSC_STALL_RACEWAR in usbmsc_scsi.c, however this
	  has not been verified yet.  From Wolfgang Reißnegger (2016-11-18).
	* SAM3/4: Remove unused 'halted' flag in UDP driver.  From Wolfgang
	  Reißnegger (2016-11-18).
	* SAM3/4: Remove 'stalled' flag in UDP driver.  The flag is not necessary.
	  The state of the endpoint can be determined using 'epstate' instead.
	  From Wolfgang Reißnegger (2016-11-18).
	* USBMSC: Fix length of mode6 sense reply packet.  From Wolfgang
	  Reißnegger (2016-11-18).
	* configs/dk-tm4c129x: Typo fix.  From Wolfgang Reißnegger (2016-11-18).
	* Typo fix in sam_udp.c.  From Wolfgang Reißnegger (2016-11-18).
	* STM32: STM32F303xB and STM32F303xC chips have 4 ADCs.  From Paul A.
	  Patience (2016-11-19).
	* vfork(): Fix a race condition in the SMP case.  Existing logic
	  depended on the fact that the child would not run until waitpid was
	  called because the child had the same priority as the parent.  BUT
	  in the SMP case that is not true... the child may run immediately on
	  a different CPU (2016-11-19).
	* arch/:  Add option to use low-priority work queue to all Ethernet
	  drivers in arch that support CONFIG_NET_NOINTS (2016-11-19).
	* sched/clock:  Correct calculation for the case of Tickless mode with
	  a 32-bit timer.  In that case, the calculation was returning
	  millisecond accuracy.  That is not good when the timer accuracy is < 1
	  msec.  From Rajan Gill (2016-11-19).
	* sched/task: task_restart() test not supported on SMP systems.  This is
	  not fully implemented (2016-11-19).
	* This commit adds a new internal interfaces and fixes a problem with
	  three APIs in the SMP configuration.  The new internal interface is
	  sched_cpu_pause(tcb).  This function will pause a CPU if the task
	  associated with 'tcb' is running on that CPU.  This allows a different
	  CPU to modify that OS data stuctures associated with the CPU.  When the
	  other CPU is resumed, those modifications can safely take place.  The
	  three fixes are to handle cases in the SMP configuration where one CPU
	  does need to make modifications to TCB and data structures on a task
	  that could be running running on another CPU.  Those three cases are
	  task_delete(), task_restart(), and execution of signal handles.  In
	  all three cases the solutions is basically the same:  (1) Call
	  sched_cpu_pause(tcb) to pause the CPU on which the task is running,
	  (2) perform the necessary operations, then (3) call up_cpu_resume() to
	  restart the paused CPU (2016-11-20).
	* task_restart: Make sure new task starts with pre-emption disabled and
	  not in a critical section (2016-11-21).
	* Fix a typo in a spinlock macro (2016-11-21).
	* Spinlocks:  Added capability to provide architecture-specific memory
	  barriers.  This was for i.MX6 but does not help with the SMP problems.
	  It is still a good feature (2016-11-21).
	* Remove a assertion condition that appears to rarely cause false-alarm
	  assertions.  Teported by Petteri Aimonen (2016-11-21).
	* The examples/qencoder app was trying to init the encoder by a direct
	  call into the board, cheating in a local header to declare the normally
	  unavailable function prototype.  From Sebastien Lorquet (2016-11-22).
	* configs:  All QE encoder files.  Last change made timer hard-coded to 3.
	  Make configurable (2016-11-22).
	* configs: Remove all traces of the no-longer existent ARCHBUTTONS
	  example.  Remove all button configurations that depended on the
	  obsoleted ARCHBUTTON example (2016-11-22).
	* nucleo-l476rg: Add better selection of timer (2016-11-22).
	* implementation of dumpgpio for stm32l4, was required for pwm debug.
	  From Sebastien Lorquet (2016-11-22).
	* SMP: Add logic to avoid a deadlock condition when CPU1 is hung waiting
	  for g_cpu_irqlock and CPU0 is waitin for g_cpu_paused (2016-11-22).
	* Misoc:  Add timer driver.  From Ramtin Amin (2016-11-22).
	* Misoc:  Add commits and warnings about missing caculation of the timer
	  reload value (2016-11-22).
	* SAM3/4: Name of method is now setcallback, not sethandler (2016-11-22).
	* sam4s-xplained-pro/nsh: Configuration uses old, improper timer interface.
	  CONFIG_TIMER disabled in configuration. (2016-11-22).
	* sam4s-xplained-pro:  Remove obsolete timer initialization logic
	  (2016-11-22).
	* Misoc LM32: Make system timer configurable via CONFIG_USEC_PER_TICK.
	  From Ramtin Amin (2016-11-23).
	* LPC43xx: Add timer driver; configs/bambino-200e: Add support for timer
	  driver.  From Alan Carvalho de Assis (2016-11-23).
	* SMP: Fix backward condition in test (2016-11-23).
	* ARMv7-A SMP: Add a little logic to signal handling (2016-11-24).
	* Misoc LM32: Add signal handling logic.  From Ramtin Amin (2016-11-24).
	* SMP: Add spin_trylock().  Use this in conditions where other CPUs need
	  to stopped but we cannot call enter_critical_section (2016-11-24).
	* Fix for F1 RTC Clock, tested on F103.  From Maciej Wójcik (2016-11-25).
	* SMP:  Fix yet another potential deadlock (2016-11-25).
	* Enable CONFIG_RTC in the hymini-stm32v/nsh2 (kitchensink) config.
	  From Maciej Wójcik (2016-11-26).
	* This adds support for keeping i.MX6 inter-processor communication data
	  in a non-cached address region (2016-11-26).
	* i.MX6: Disable non-cached region support.  Add SCU register definitions
	  (2016-11-26).
	* i.MX6: Add some controls to enable SMP cache coherency in SMP mode
	  (2016-11-26).
	* ARMv7-A: Fix some SCU SMP logic (2016-11-26).
	* ARMv7-A/i.MX6:  Modify handling of the SMP cache coherency
	  configuration so that it is identical to the steps from the TRM.
	  Makes no differenct, however (2016-11-27).
	* The Smoothie project needs to compile C++ inside config/boardname/src/
	  to use with High Priority Interruption, then I modified the board
	  configs Makefile to support it.  It works fine for the first time
	  compilation, but if we execute "touch config/boardname/src/Pin.cxx"
	  and execute "make" it will not detect that Pin.cxx was modified. I
	  think there is some other place I should modify, but I didn't find
	  it.  From Alan Carvalho de Assis (2016-11-27).
	* ARMv7-A/i.MX6 SMP: Move SMP coherent cache setup to earlier in
	  initialization of CPUn, n>0 (2016-11-27).
	* ARMv7 GIC: SGIs are non-maskable but go through the same path as other,
	  maskable interrupts.  Added logic to serialize SGI processing when
	  necessary (2016-11-27).
	* sched_note: Extend OS instrumentation to include some SMP events
	  (2016-11-27).
	* sched_note: Add spinlock instrumentation; In SMP configurations,
	  select to log only notes from certain CPUs (2016-11-28).
	* Misoc LM3: Add Misoc Ethernet driver.  Integrate network support into
	  configs/misoc/hello.  Remove configs/misoc/include/generated directory.
	  I suppose the intent now is that this is a symbolic link?  DANGER!
	  This means that you cannot compile this code with first generating
	  these files a providing a symbolic link to this location!  From Ramtin
	  Amin (2016-11-28).
	* Add tools/showsize.sh (2016-11-28).
	* configs/misoc:  Add a sample directory containing generated sources.
	  This is really only useful for performing test builds.  You really
	  must generate the Misoc architecture for a real-life build.  From
	  Ramtin Amin (2016-11-28).
	* sched_note: Permit spinlock and critical section notes in in-memory
	  buffer iff sched_not_get() interfaces is disabled (2016-11-28).
	* STM32 DAC:  Fix shift value whenever there are is a DAC2 and, hence,
	  up to three interfaces.  From Marc Rechté (2016-11-29).
	* Back out a debug change that was included in commit (2016-11-29).
	* i.MX6: Don't output the alphabet if CONFIG_DEBUG_FEATURES is not set
	  (2016-11-29).
	* Misoc LM32: Add logic to flush/invalidate caches.  From Ramtin Amin
	  (2016-11-29).
	* drivers/net/: Adapt all Ethernet drivers to work as though
	  CONFIG_NET_MULTIBUFFER were set.  Remove all references to
	  CONFIG_NET_MULTIBUFFER (2016-11-29).
	* stm32_otghshost: if STM32F446 increase number of channels to 16.  From
	  Janne Rosberg (2016-11-30).
	* usbhost_composite:  Fix end offset in usbhost_copyinterface().  From
	  Janne Rosberg (2016-11-30).
	* usbhost_cdcacm:  Add CDC_SUBCLASS_ACM and CDC_PROTO_ATM to supported
	  class and proto.  From Janne Rosberg (2016-11-30).
	* LPC43 SD/MMC:  Correct some git definitions on SMMC control register
	  in lpc43_sdmmc.h.  From Alan Carvalho de Assis (2016-11-30).
	* STM32L4: Correct USART1/2 definitions.  Use default mbed UART4
	  settings.  From Sebastien Lorquet (2016-12-01).
	* boardctl:  Add new boardctl() command ,BOARDIOC_NX_START, to start the
	  NX server as a kernel thread (2016-12-01).
	* GPDMA driver for the LPC43xx.  The GPDMA block is basically the same
	  as the LPC17xx.  Only the clock configuration is different and LPC43xx
	  has four different DMA request sources, where LPC17xx has only two.
	  From Alan Carvalho de Assis (2016-12-01).
	* Remove RGMP and RGMP drivers (2016-12-02).
	* i.MX6:  Add an untested SPI driver taken directly from the i.MX1 port
	  (2016-12-02).
	* Eliminate CONFIG_NO_NOINTS.  There is no longer any support for
	  interrupt level processing of the network stack. Lots of files changed
	  -> lots of testing needed (2016-12-03).
	* Fix DEBUGASSERT() in group_signal.c.  From Masayuki Ishikawa
	  (2016-12-04).
	* Add support for the SAM5CMP-DB board.  From Masayuki Ishikawa
	  (2016-12-04).
	* SAM3/4:  Add SMP support for the dual-core SAM4CM.  From Masayuki
	  Ishikawa (2016-12-04).
	* C Library: Allow option to enable IP address conversions even when the
	  IP address family is not supported (2016-12-04).
	* SSD1306: Fix errors in SPI mode configuration.  From Gong Darcy
	  (2016-12-04).
	* SAMA5 does not build when executing from SDRAM before board
	  frequencies are not constant.  Rather, the bootloader configures the
	  clocking and we must derive the clocking from the MCK left by the
	  bootloader.  This means lots more computations.  This is untested on
	  initial commit because I don't have a good PWM test setup right now
	  (2016-12-04).
	* Olimex-LPC1766-STK: Enable procfs in NSH configuration. Automount
	  /proc on startup (2016-12-05).
	* SAM4CMP-DB: Add hooks to auto-mount the procfs file system on startup
	  in board bring-up logic (2016-12-05).
	* Remove all references to BOARDIOC_PWMSETUP and board_pwm_setup()
	  (2016-12-05).
	* Remove all references to BOARDIOC_ADCSETUP and board_adc_setup()
	  (2016-12-05).
	* Added Timers 2-5 and control of SAI and I2S PLLs.  From David Sidrane
	  (2016-12-05).
	* Added support for stmf469 SAI and I2S PLL configuration and STM446
	  fixes.  From David Sidrane (2016-12-05).
	* Expanded otgfs support to stm32F469 and stm32f446.  Added missing bits
	  definitions, Used stm32F469 and stm32f446 bit definitions,  Removed
	  unsed header file.  From David Sidrane (2016-12-05).
	* Remove BOARDIOC_CAN_INITIALIZE.  CAN initialization is now done in the
	  board initialization logic just like every other device driver
	  (2016-12-06).
	* STM32F7: Allow the config to override the clock edge setting.  From
	  David Sidrane (2016-12-06).
	* For Cortex-A9, should also set ACTLR.FW in SMP mode to enble TLB and
	  cache broadcasts.  Does not fix SMP cache problem (2016-12-07).
	* sched notes: Add additional note to see if/when CPU is started in SMP
	  mode (2016-12-07).
	* EFM32: Fix a compilation error.  From Pierre-noel Bouteville
	  (2016-12-07).
	* pthreads:  Add pthread_cleanup_push() and pthread_cleanup_pop()
	  (2016-12-08).
	* BUGFIX:STM32F427 was rebooting. Over reached family.  From David
	  Sidrane (2016-12-08).
	* Add pthread_setcanceltype() and pthread_testcancel() (2016-12-09).
	* Added STM32F469 RAM size and deliberated STM32F446 size.  From David
	  Sidrane (2016-12-09).
	* Typo in stm32f76xx77xx_pinmap.h edited online with Bitbucket.  From
	  David Sidrane (2016-12-09).
	* stm32_allocateheap.c edited online with Bitbucket.  From David Sidrane
	  (2016-12-09).
	* LPC43xx SD card: Correct pin configuration options needed for SD card
	  pins.  From Alan Carvalho de Assis (2016-12-09).
	* pthread_mutex_destroy(): Fix an error in destroying a mutex which can
	  occur after a pthread has been canceled while holding the mutex
	  (2016-12-09).
	* Add support for cancellation points (2016-12-09).
	* Forgot to add some files in the last commit (2016-12-10).
	* Correct some default font IDs.  From Pierre-Noel Bouteville
	  (2016-12-10).
	* task_delete() now obeys all cancellation point semantics (2016-12-10).
	* Add task_setcancelstate(), task_setcanceltype(), and task_testcancel().
	  These are non-standard interfaces analogous to the correponding pthread_
	  interfaces that provide cancellation controls for tasks (2016-12-10).
	* i.MX6 interrupt handling:  Additional logic needed to handle nested
	  interrupts when an interrupt stack is used (2016-12-13).
	* SAMV7 MCAN: Prevent Interrupt-Flooding of ACKE when not connected to
	  CAN-BUS. An Acknowledge-Error will occur every time no other CAN Node
	  acknowledges the message sent. This will also occur if the device is
	  not connected to the can-bus. The CAN-Standard declares, that the Chip
	  has to retry a given message as long as it is not sent successfully (or
	  it is not cancelled by the application). Every time the chip tries to
	  resend the message an Acknowledge-Error-Interrupt is generated. At high
	  baud rates this can lead in extremely high CPU load just for handling
	  the interrupts (and possibly the error handling in the application). To
	  prevent this Interrupt-Flooding we disable the ACKE once it is seen as
	  long we didn't transfer at least one message successfully.  From Frank
	  Benkert (2016-12-13).
	* i.MX6: Remove non-cached, inter-cpu memory region.  Not a useful
	  concept (2016-12-13).
	* minnsh Configurations: Remove minnsh configurations and support logic:
	  up_getc() and lowinstream.  This was an interesting exercise to see
	  just how small you could get NuttX, but otherwise it was not useful:
	  (1) the NSH code violated the OS interface layer by callup up_getc and
	  up_putc directly, and (2) while waiting for character input, NSH would
	  call up_getc() which would hog all of the CPU.  Not a reasonable
	  solution other than as a proof of concept (2016-12-13).
	* Calypso Boards: Remove all Calypso board configurations (2016-12-13).
	* Calypso: Remove Calypso architecture support and support for Calypso
	  SERCOMM driver (2016-12-13).
	* ESP32 core v2: Two changes (1) flushes the UART TX buffer in the esp32
	  serial shutdown routine. The ROM bootloader does not flush the FIFO
	  before handing over to user code, so some of this output is not
	  currently seen when the UART is reconfigured in early stages of
	  startup.  And changes the openocd config file's default flash voltage
	  from 1.8V to 3.3V. This is not necessary right now, but may save some
	  hard-to-debug moments down the track (3.3V-only flash running at 1.8V
	  often half-works and does weird things...).  From Angus Gratton
	  (2016-12-14).
	* Xtensa ESP32: Add missing ENTRY() and RET() macros in C callable
	  assembly language.  At one time I though the that the ESP32 support the
	  CALL0 ABI.  I was mistaken so there may be a few more like this
	  (2016-12-14).
	* Xtensa ESP32: Fix a couple of bugs associated with handling of CPU
	  interrupts (2016-12-14).
	* Xtensa ESP32: Fix several build-related issues associated with vector
	  section (2016-12-15).
	* Xtensa ESP32: Fix missing CALL0 ABI condition (2016-12-15).
	* Xtensa EPS32: Make sure that all C callable assembly functions includes
	  ENTRY prologue and RET epilogue (2016-12-15).
	* Xtensa ESP32: Fix windowspill register handling + Use r6, not r2 when
	  passing paramters with call4 (2016-12-16).
	* Xtensa ESP32: Use r6, not r2 when passing paramters with call4
	  (2016-12-16).
	* Xtensa ESP32: Correct a logic problem the prevented dumping the IDLE
	  thread's stack on an assertion (2016-12-16).
	* Xtensa ESP32: Fix some missing SMP logic (2016-12-16).
	* Xtensa ESP32: Basically a redesign of the interrupt dispatch logic
	  (2016-12-16).
	* Xtensa ESP32: Level 1 interrupts should return via RFE (2016-12-17).
	* Xtensa ESP32: One register getting clobber on context save (2016-12-17).
	* STM32 F7: Fix some STM32F7 copy paste errors.  From David Sidrane
	  (2016-12-17).
	* CDC/ACM Device Class: uart_ops_s portion of cdcacm will not be
	  initalized with correct functions if CONFIG_SERIAL_DMA is lit
	  (2016-12-17).
	* Xtensa ESP32: Using wrong register to disable interrupts (2016-12-17).
	* Xtensa ESP32: Fix clobbered a9 in co-processor context save/restore
	  (2016-12-17).
	* Xtensa ESP32: Need to clone some logic for synchronous context switch.
	  Window spill logic in the conmon restores logic is inappropriate in
	  this context (2016-12-17).
	* sscanf(): Add scansets to the scanf function. Enabled
	  CONFIG_LIBC_SCANSET option.  From  Aleksandr Vyhovanec (2016-12-17).
	* Xtensa ESP32: Fix context save logic when called in window ABI
	  configuration. Add an IDLE stack.  Don't depend on the mystery stack
	  received from the bootloader (2016-12-18).
	* Xtensa ESP32: Need to spill registers to memory as the last dying
	  action before switching to a new thread (2016-12-18).
	* ESP32 Serial: Add logic to prevent infinite loops in interrupt handler
	  (2016-12-18).
	* Xtensa ESP32: Automatically mount /proc at start-up (2016-12-19).
	* Xtensa ESP32: Corrects timer initialization and timer input frequency
	  (2016-12-19).
	* Tiva PWM: Support PWM_PULSECOUNT feature for TI tiva.  From Young.Mu
	  (2016-12-20).
	* Xtensa ESP32: Missing prologue/epilogue macros on C callable function
	  (2016-12-20).
	* Xtensa ESP32: Update APP CPU startup logic to match current Expressif
	  example code.  Fix errors APP CPU startup (2016-12-20).
	* fs/procfs: Fix procfs status for SMP case (2016-12-20).
	* Xtensa ESP32:  Clock frequency is different if running from IRAM or is
	  booting from FLASH.   This is a booltloader issue (2016-12-20).
	* Xtensa ESP32:  Basic port is function in both single CPU and dual CPU
	  SMP configurations.  There is an NSH configuration for each CPU
	  configuration (2016-12-21).
	* STM32 F4: Merge in support for the Olimex STM32 P407 board (2016-12-21).
	* Xtensa ESP32: Add an OS test to verify the port (2016-12-22).
	* Xtensa ESP32:  Corrects a problem with dispatching to signal handlers:
	  Cannot vector directly to the signal handling function as in other ABIs
	  under the Xtensa Window ABI.  In that case, we need to go through a
	  tiny hook when performs the correct window call (call4) otherwise
	  registers will be scrambled in the signal handler (2016-12-22).
	* SAMV7 CAN: Make delete_filter functions more robust.  From Frank
	  Benkert (2016-12-23).
	* Xtensa ESP32: Add stack checking logic (2016-12-23).
	* sched note: record ID enumeration now results on constant values; ID
	  values do not change with configuration.  This makes writing
	  post-processing software much easier (2016-12-24).
	* STM32 F3: Forgot to update chip.h for STM32F303x[BC]'s 4 ADCs
	  (2016-12-24).
	* STM32 F4: Allow dma in 1 bit mode in STM32F4xxx.  From David Sidrane
	  (2016-12-24).
	* termios.h:  Fix CRTSCTS define to include input and output flow.
	  From  Lorenz Meier (2016-12-26).
	* SMP: Enforce this rule: Tasks which are normally restored when
	  sched_unlock() is called must remain pending (1) if we are in a
	  critical section, i.e., g_cpu_irqlock is locked , or (2) other CPUs
	  still have pre-emption disabled, i.e., g_cpu_schedlock is locked.  In
	  those cases, the release of the pending tasks must be deferred until
	  those conditions are met (2016-12-26).

7.20 2017-03-08 Gregory Nutt <gnutt@nuttx.org>

	* i.MX6 SMP/NSH configuration: Enable examples/smp test (2016-12-27).
	* SMP: There were certain conditions that we must avoid by preventing the
	  release of the pending tasks while withn a critical section.  But this
	  logic was incomplete; there was no logic to prevent other CPUs from
	  adding new, running tasks while on CPU is in a critical section.  This
	  commit corrects this.  This is matching logic in sched_addreadytorun to
	  avoid starting new tasks within the critical section (unless the CPU is
	  the holder of the lock).  The holder of the IRQ lock must be permitted
	  to do whatever it needs to do (2016-12-27).
	* i.MX6: Fix clearing GPT status register.  From Masayuki Ishikawa
	  (2016-12-28).
	* SMP: Make checks for CPU lock set more robust.  There are certains
	  conditions early in initialization on during interrupt handling where
	  things need to be done a little differently (2016-12-28).
	* sched_cpulocked:  Avoid use of spinlock.  That has been reported to
	  cause a deadlock (2016-12-28).
	* SMP: Fix a gap where we may try to make modifications to the task lists
	  without being in a critical sections.  That permits concurrent access to
	  the tasks lists and many subtle problems.  This fix just remains in the
	  critical section throughout the operation (and possible until the task
	  is restore in the event of a context switch).  Makes a big difference in
	  stability (2016-12-28).
	* SMP: Move sharable function to common file as irq_cpu_locked().  Use
	  irq_cpu_locked() in sched_unlock().  Use irq_cpu_locked() in
	  sched_removereadytorun() and sched_setpriority().  Use irq_cpu_locked()
	  in sched_mergepending() (2016-12-29).
	* Add configuration support for builds with Ubuntu under Windows 10
	  (2017-01-01).
	* Add support for Tom Thumb small mono-space font. From Alan Carvalho de
	  Assis (2017-01-03).
	* Alternative way to encode font spacing for Tom Thumb font (2017-01-04).
	* Graphics: Initial separation of font cache from graphics/nxterm.  Now in
	  libnx/nxfronts where it can be shared with other grapics applications
	  (2017-01-05).
	* Font cache:  Fix a reference counting issue: count not be initialized
	  when font cache created.  Fix initialization of a semaphore. Enforce
	  mutually exclusive access to the font cache Replace fixed-size array
	  with variable size link list. Font cache in libnx needs to use
	  context-specific memory allocators (2017-01-06).
	* Add debug assertion in libdtoa to catch attempts to use floating point
	  output formats from within an interrupt handler.  That will cause
	  assertions or crashes downstream because __dtoa will attempt to allocate
	  memory.  From Pierre-noel Bouteville (2017-01-06).
	* procfs:  Correct to snprintf-related errors in fs_procfsproc.c.
	  Resolves issue #24 (2017-01-07).
	* STM32F429i Discovery: Add support for NxWM on STM32F429i-Disco board.
	  From Alan Carvalho de Assis (2017-01-07).
	* STM32F429i-DISCO: Enable keyboard input in nxwm configuration
	  (2017-01-07).
	* STM32F429i-DISCO:  Change NxWM cursor character from 137 (graphics
	  block) to 95 (underscore).  NxWM is configured to use a 7-bit character
	  set so 137 is not a valid character code (2017-01-07).
	* NX server: Correct message queue names.  Should not be at /dev, but
	  rather relative to /var/mqueue (2017-01-08).
	* NxWM configurations.  If using a 7-bit character set, then the cursor
	  character cannot be 137 (graphic block).  Use 95 (underscore) instead
	  (2017-01-08).
	* packed_struct replaced by begin_packed_struct and end_packed_struct.
	  From Aleksandr Vyhovanec (2017-01-09).
	* sched_note: Fix spinlock instrumentation.  From Masayuki Ishikawa
	  (2017-01-12).
	* SMP: Fix an error in critical section logic when performing a context
	  switch from an interrupt handler.  The g_cpu_irqset bit was not being
	  set for the CPU so other CPUs did not know about the critical section
	  (2017-01-13).
	* Kinetis: Added support for CHIP_MK60FN1M0VLQ12 chip.  From Maciej
	  Skrzypek (2017-01-13).
	* Kinetis: Fixed wrong MCG VDIV calculation on new NXP K60.  From Maciej
	  Skrzypek (2017-01-13).
	* Kinetis Serial: Fixed compile error when UART5 is selected.  From Maciej
	  Skrzypek (2017-01-13).
	* Kinetis: Need to set HAVE_UART_DEVICE when UART4 is selected.  From
	  Maciej Skrzypek (2017-01-13).
	* Kinetis MCG: Wrong FRDIV set in MCG_C1.  From Maciej Skrzypek
	  (2017-01-13).
	* Kinetis:  New K60 has no Flex memory.  From Maciej Skrzypek (2017-01-13).
	* In all implementations of _exit(), use enter_critical_section() vs.
	  disabling local interrupts (2017-01-13).
	* i.MX6:  Corrects behavior of last SMP patch with i.MX6 (2017-01-13).
	* SMP Signals: Fix some SMP signal delivery logic. Was not handling some
	  critical sections correctly and was missing logic to signal tasks
	  running on other CPUs (2017-01-14).
	* STM32F103 Minimum: Add support for nRF24 on STM32F103-Minimum board.
	  From Alan Carvalho de Assis (2017-01-15).
	* Kinetis:  Add support for K64/K66 RTC lower half driver. From Neil
	  Hancock (2017-01-17).
	* Networking: Fixed some issues that prevented ipv6 to work with ipv4
	  enabled.  From Pascal Speck (2017-01-18).
	* STM32 Oneshot: Fix logic so that it can support multiple oneshot timers
	  (2017-01-18).
	* STM32L4:  Port fix for multiple oneshot timers from STM32.  Also fixes a
	  few issues with original STM32 implementation (2017-01-18).
	* SAM3/4: Add support for ATSAM4S4C.  From Wolfgang Reißnegger (2017-01-18).
	* Math library: Leverage optimized ARM functions from BSD license ARM file
	  (2017-01-19).
	* Math library optimatizations for FPU only apply to ARMv8 which is not
	  yet supported (2017-01-20).
	* Move optimized ARM memcpy functions from arch/arm/src/ to
	  libc/machine/.  This is necessary for the PROTECTED and KERNEL build
	  modes.  Otherwise, memcpy() will be built in to kernel space and not
	  accessible to applications (2017-01-20).
	* libc: Fix ARMv7-A/R memcpy assembly (2017-01-20).
	* ARM memcpy():  Use DWord vs. HWord offset.  ARM 32-bit instructions must
	  be aligned to DWord boundaries and this gives us more range in the jump
	  tables (2017-01-20).
	* Fix a compile error: in sched_cpuload.c:Line136, the variables ts and
	  secs are not defined if CONFIG_CPULOAD_ONESHOT_ENTROPY = 0. However,
	  these variables are used regardless of CONFIG_CPULOAD_ONESHOT_ENTROPY at
	  lines~180:onwards.  From Rajan Gill (2017-01-22).
	* CPU load: Correct computation of the nominal period to use when the
	  source is a oneshot timer (2017-01-22).
	* Kernel Modules:  Module initializer may now return a symbol table
	  (2017-01-22).
	* Modules:  Extend the module interface so that we can access symbols
	  exported by the module (2017-01-22).
	* Shared Libraries:  In the FLAT build mode, kernel modules may be used to
	  provide minimal shared library functionality (2017-01-22).
	* Shared libraries:  Add a non-standard dllfnc.h function to set the
	  symbol table (2017-01-23).
	* Olimex-stm32-p407: Add a NSH protected build configuration; Enable
	  procfs/ in all configurations (2017-01-23).
	* SMP:  Fix timer related issues:  Round robin and sporadic scheduling
	  were only being performed for tasks running on the CPU that processes
	  the system timer interrupt.  Similary, CPU load measurements were only
	  be processed for running on the CPU that receives the sampling interrupt
	  (2017-01-23).
	* STM32 F7: Added missing ARCH_HAVE_RESET for F7.  From David Sidrane
	  (2017-01-23).
	* STM32: Add missing STM32_BKP_BASE.  From David Sidrane (2017-01-23).
	* Configurations that enable OSTEST must not disable signals (2017-01-24).
	* Add missing sched_note_*() calls to sam4cm SMP functions (2017-01-24).
	* Fix return value if x is NaN.  From Aleksandr Vyhovanec (2017-01-25).
	* MMCSD_SDIO: Only wait for card ejected if card detection is supported.
	  From Alan Carvalho de Assis (2017-01-26).
	* LPC43 pinset definitions:  Add more 1 bit to pinset to reach
	  SFSCLK0-SFSCLK3. Remove PINCONFIG_DIGITAL.  From Alan Carvalho de Assis
	  (2017-01-26).
	* sched/modules:  Add support for dependencies between modules (2017-01-27).
	* Back out use on inline functions to access 16-bit registers.  The inline
	  functions were a work-around for misbehaving compiler years and years
	  ago.  The mon standard macro-ized version should work just fine
	  (2017-01-27).
	* Olimex STM32 P407: Add support for on-board microSD slot.  Does not
	  work... Currently all commands to the SD card timeout (2017-01-28).
	* libc/modlib:  Add build a configuration logic for a shared module
	  library (2017-01-29).
	* Module names are not needed in libc/modlib when the module library is
	  used only for shared library support (2017-01-29).
	* Shared Libs: Implement module based shared libraries for the PROTECTED
	  mode build (2017-01-29).
	* Typos withim mtd/ with Macronix MX25L.  In NuttX/drivers/mtd/Make.defs
	  letters X between M and 25 are missing.  Noted by Oleg Evseev
	  (2017-01-x30x).
	* SAME70-Xplained: Clone some recent SAMV71-XULT changes (2017-01-30).
	* Add capabilities() method to SDIO interface.  Remove
	  CONFIG_SDIO_WIDTH_D1_ONLY.  That should not be a global propertie, but
	  rather a capability/limitation of single slot when there may be multiple
	  slots (2017-01-31).
	* Removed dmasupported() method from the SDIO interface.  That is now a
	  bit in the capability set (2017-01-31).
	* STM32F7 SDMMC:  Add support for single bit operation on SDMMC2
	  (2017-01-31).
	* STM32F103-Minimum:  Fix a compile error.
	  CONFIG_STM32_TICKLESS_ONESHOT_TIMER is only defined in TICKLESS mode.
	  Somebody has been hand editing .config files (2017-01-31).
	* Timer logic: Add private function prototypes to eliminate a warning;
	  Functions should not be inline because the may recurse (2017-01-31).
	* STM32F7 SDMMC: Make sure that all SDMMC configuration variables begin
	  with STM32F7_; Eliminate CONFIG_SDMMC1/2_DMA altogether.  Does not
	  appear to be used (2017-01-31).
	* STM32F429-DISCO:  Move some board initialization logic that is not
	  usable because it lacks the configuration options to make it so
	  (2017-01-31).
	* Cancellation points:  Fix some backward logic in conditional compilation
	  (2017-02-02).
	* Soft links:  Add an implementation of readlink() (2017-02-03).
	* inode_find:  Now takes struct inode_desc_s type as input.  That
	  structure includes some data storage.  It was used within inode_find(),
	  but that means that the life of the data was the life of inode_find().
	  That data must persist longer.  It is now provided by the caller so that
	  the life of the data persists for the entire life of the caller
	  (2017-02-05).
	* tools/noteinfo.c: A hack tool that I use to analyze some sched_note
	  output.  Needs a home and may be useful to others (2017-02-05).
	* Pseudo File System:  Add support for soft links in the top-level pseudo
	  file system (2017-02-05).
	* Updates to Kinetis SDHC driver.  From Marc Rechté (2017-02-06).
	* SDIO interface: Handle all possible DMA combinations in all SDIO drivers
	  (2017-02-07).
	* up_timer_initialize() is named incorrectly.  The prefix should be the
	  architecture name, not up_ since it is private to the architecture.
	  up_timerisr() is similarly misnamed and should also be private since it
	  is used only with the xyz_timerisr.c files (2017-02-07).
	* MCG defines are based on the MCG feature configuration.  We define the
	  bits as a common set of names. This means that an index may be added to
	  a name i.e. LOCK is LOCK0 as that is the superset name.  From David
	  Sidrane (2017-02-07).
	* Fixes illdefined BOARD_FR_DIV with BOARD_FRDIV from MCG.  Original
	  BOARD_FR_DIV was never used - that is a good thing because the value ws
	  defined shifted and the code also shifted it.  From David Sidrane
	  (2017-02-07).
	* Added MCG settings that are defiend on the K64 SoC.  Added
	  BOARD_MCG_C2_FCFTRIM and BOARD_MCG_C2_LOCRE0 to configure the MCG_C2
	  register cleanup of some comments.  From David Sidrane (2017-02-07).
	* Better granualarity and errno checking of the board's MCG settings.
	  Allow for complete MCG_C2 definition from the boart.h file.  Moved
	  #ifdef out of code by setting default values.  Allow for individule bit
	  setting in MCG_C2 for BOARD_EXTCLOCK_MCG_C2, BOARD_MCG_C2_FCFTRIM,
	  BOARD_MCG_C2_LOCRE0.  Added range and sanity checking.  From David
	  Sidrane (2017-02-07).
	* Cosmetic changes from review of last PR (2017-02-07).
	* C library: Remove comments blocks before empty sections (2017-02-08).
	* C Library: Add a very limited, first step implementation of setvbuf().
	  This is a collaborative effort.  Alan Carvalho de Assis did the initial
	  prototype (2017-02-08).
	* setvbuf: Add support for configuration of line buffering (2017-02-08).
	* Bamboo-200E: Add netnsh configuration.  From Alan Carvalho de Assis
	  (2017-02-08).
	* USBMSC: Always set LUN readonly flag.  From Wolfgang Reißnegger
	  (2017-02-08).
	* drivers/lcd:  ssd1306_configspi() must have global scope (2017-02-09).
	* SIM:  Add readlink and setvbuf to nuttx-names.dat (2017-02-09).
	* setvbuf:  Add support for disabling I/O bufferin (2017-02-09).
	* setvbuf: Fix some compile errors in first build of logic to
	  enable/disable buffering (2017-02-09).
	* C Library:  Clean-up buffer selections in Kconfig (2017-02-09).
	* sem_open():  Fix a compiler error introduced with the setvbuf() changes
	  (2017-02-09).
	* MMC/SD SDIO:  Some drivers need to start DMA before sending CMD24 and
	  some AFTER.  From Alan Carvalho de Assis (2017-02-09).
	* Kinetis SDHC driver fixes.  From Marc Rechté (2017-02-09).
	* Bambino-200E: Use .elf extension on all executables.  From Alan Carvalho
	  de Assis (2017-02-09).
	* Kinetis:  Add support for K66 family.  From David Sidrane (2017-02-09).
	* Created a kinetis MCG versioning scheme pulled in by Kinetis chip.h

	  The motivations is to version the IP blocks of the Kinetis K series
	  family of parts.

	  This added versioning and configuration features for the Kinetis MCG IP
	  block.

	  It is envisioned that in the long term as a chip is added.  The author
	  of the new chip definitions will either find the exact configuration in
	  an existing  chip define and add the new chip to it Or add the MCG
	  feature configuration #defines to the chip ifdef list in
	  arch/arm/include/kinetis/kinetis_mcg.h  In either case the author should
	  mark it as "Verified to Document Number:" taken from the reference manual.

	  The version KINETIS_MCG_VERSION_UKN has been applied to most all the
	  SoCs in the kinetis arch prior to this commit.

	  The exceptions are the CONFIG_ARCH_CHIP_MK60FN1M0VLQ12, All K64 and K66
	  which not have Verified MCG configurations.

	  From David Sidrane (2017-02-09).
	* Kinetis chip Adding K66 and including MCG versioning.  This includes
	  arch/arm/include/kinetis/kinetis_mcg.h to bring in the MCG versioning
	  and defines the KINETIS_K66 family for the added SoCs:

	     --------------- ------- --- ------- ------- ------ ------ ------ -----
	     PART NUMBER     CPU     PIN PACKAGE  TOTAL  PROGRAM EEPROM SRAM  GPIO
	                     FREQ    CNT          FLASH  FLASH
	     --------------- ------- --- ------- ------- ------ ------ ------ -----
	     MK66FN2M0VMD18  180 MHz 144 MAPBGA   2   MB    —    — KB  260 KB 100
	     MK66FX1M0VMD18  180 MHz 144 MAPBGA  1.25 MB  1 MB   4 KB  256 KB 100
	     MK66FN2M0VLQ18  180 MHz 144 LQFP     2   MB    —    — KB  260 KB 100
	     MK66FX1M0VLQ18  180 MHz 144 LQFP    1.25 MB  1 MB   4 KB  256 KB 100

	  From David Sidrane (2017-02-09).
	* STM32: Fixes the bkp reference counter issue.  From David Sidrane
	  (2017-02-09).
	* STM32F7: Fixes the bkp reference counter issue.  From David Sidrane
	  (2017-02-09).
	* C Library: Add setbuf() which is a trivial wrapper around setvbuf()
	  (2017-02-09).
	* tools/mkconfig.c: Add logic to keep all of the buffering options in sync
	  (2017-02-10).
	* VFS rename: Fix issues with rename to subdirectories and some softlink
	  issues (2017-02-11).
	* Add logic to VFS rename:  If target of rename exists and is a directory,
	  then the source file should be moved 'under' the target directory.
	  POSIX also requires that if the target is a file, then that old file
	  must be deleted (2017-02-11).
	* rename: An inode with no operations should be treated like a directory
	  for the purposes of rename (2017-02-12).
	* rename(): Correct more issues.  (1) Move to the root directory in the
	  pseudo file system, (2) Fix path naming calculation when the path is the
	  root directory of a mounted file system, and (3) dont't do the rename if
	  the source and destination of the rename are the same (2017-02-12).
	* Add basic fstat() support (2017-02-12).
	* Add fstat support to binfs (2017-02-12).
	* fstat:  Add fstat() support to romfs (2017-02-12).
	* fstat:  Add fstat() support to unionfs (2017-02-12).
	* I found an issue inside the cp15_coherent_dcache function in file,
	  arch/arm/src/armv7-r/cp15_coherent_dcache.S.

	  The "mcr CP15_BPIALLIS(r0)" instruction is used for invalidating entire
	  branch predictor.  But the problem is, since this is the generic code
	  and can be called on any armv7-r architecture based CPU's.  It is a
	  problem, if this instruction is called in uni processor configuration.
	  Because, BPIALLIS (c7, 0, c1, 6) instruction is only added as part of
	  the "Multiprocessing Extensions" (As per ARM® Architecture Reference
	  Manual /ARMv7-A and ARMv7-R edition)

	  So in my opinion, this instruction should be under SMP configuration. In
	  non-SMP configuration this instruction could become undefined.

	  From Manohara HK (2017-02-13).
	* fstat:  Add fstat() support to tmpfs (2017-02-13).
	* fstat:  Add fstat() support to nxffs (2017-02-13).
	* fstat:  Add fstat() support to nfs (2017-02-13).
	* NFS: Use clock_gettime() instead of deprecated gettimeofday()
	  (2017-02-13).
	* fstat:  Add fstat() support to FAT.  From Alan Carvalho de Assis
	  (2017-02-13).
	* ROMFS: stat() and fstat() should always indicate that directories are
	  executable (2017-02-13).
	* Kinetis SDHC - Enable clock after selected.  From David Sidrane
	  (2017-02-14).
	* Kinetis SPI and I2C are 0 based.  The K whole family line has max 4 or
	  each. But the supported parts have the maximums listed below:

	  K46 and K66    3 SPI SPI0-SPI2
	  K46 and K66    4 I2C I2C0-I2C3

	  From David Sidrane (2017-02-10).
	* Add support for NXP Freedom-k66f development board.  From David Sidrane
	  (2017-02-14).
	* Kinetis: Define Alternate addresses for IP blocks in both AIPS0 &
	  AIPS1.  Added ALT version of RNGA, FTM2, DAC0 as a facility to later
	  define secondary access via AIPS1 to these peripherals.  From David
	  Sidrane (2017-02-14).
	* Kinetis:  Add support for K66.  From David Sidrane (2017-02-14).
	* procfs:  stat() left several fields in uninitialized state (2017-02-14).
	* hostfs: Add support for fstat() (2017-02-14).
	* procfs: Add support for fstat() (2017-02-14).
	* smartfs: Add support for fstat() (2017-02-14).
	* Kinetis Freedom K66F:  Add Ethernet support.  From David Sidrane
	  (2017-02-14).
	* LPC43 serial:  Correct conditional logic that selects /dev/ttySN.
	  Problem noted by Alan Carvalho de Assis (2017-02-14).
	* Add usbnsh config to Bambino 200E board.  From Alan Carvalho de Assis
	  (2017-02-14).
	* procfs:  Most stat() implementations were not initializating the
	  st_atime, st_ctime, and st_mtime fields (2017-02-15).
	* Kinetis Support RMII clock source select.  This defined the RMII clock
	  source select bits and allows the selection to be made via Kconfig.
	  From David Sidrane (2017-02-15).
	* Kinetis PWM:  Add FTM3 to PWM.  From David Sidrane (2017-02-15).
	* Kinetis:Freedom-K66F uses ENET_1588_CLKIN as RMII clock.   From David
	  Sidrane (2017-02-15).
	* Fix for SAMv7 SPI: DLYBS value was calculated, but never written to any
	  registers. This led to incorrect timings on the bus.  From Michael
	  Spahlinger (2017-02-16).
	* C library:  Add swab() (2017-02-16).
	* C library: Add strtoimax and strtoumax (2017-02-16).
	* C library:  Add ffs(), rindex(), an index().  Add strings.h.  Move
	  strcasecmp, strncasecmp, bzero, bcmp, and bcopy to where they belong in
	  strings.h.h, not string.h.  bzero, bcmp, and bcopy are legacy functions;
	  the contemporary counterparts should be used instead (2017-02-16).
	* Allow board to configure HSE clock in bypass-mode. This is needed to
	  enable HSE with Nucleo-F746ZG board.  From Jussi Kivilinna (2017-02-17).
	* C library: Add fstatfs(); fix  a reference counting error in fstat()
	  (2017-02-17).
	* Update cwchar.  Add cwctype (2017-02-17).
	* Add setbuf and setvbuf to cstdio (2017-02-17).
	* Port STM32L4 SAI driver from MDK (2017-02-17).
	* STM32L4:  Bring power management logic from Motrola MDK into NuttX
	  (2017-02-18).
	* STM32L4:  Bring LPTIM driver in from the Motorola MDK (2017-02-18).
	* drivers/sensors: Add driver for the ST L3GD20 3 axis gyro.  From
	  raiden00 (2017-02-19).
	* config/stm32f429i-disco:  Add support for the L3GD20 driver.  From
	  raiden00 (2017-02-19).
	* STM32L4 COMP: Port from Motorola MDK (2017-02-19).
	* Add twr-k64f120m config and fix some ENET related problems.  From Marc
	  Rechté (2017-02-19).
	* STM32 F7: stm32_allocateheap: allow use DTCM memory for heap.  STM32F7
	  has up to 128KiB of DTCM memory that is currently left unused.  This
	  change adds DTCM to main heap if CONFIG_STM32F7_DTCMEXCLUDE is not
	  enabled.  From Jussi Kivilinna (2017-02-20).
	* This should resolve issue #30: Audio Tone Generator and PWM Multiple
	  Output Channel options.  I don't actually have a setup to verify it,
	  however (2017-02-20).
	* drivers/tone.c:  50% duty needs to be expressed a a fixed precision
	  number (2017-02-21).
	* Kinetis:  Created a kinetis SIM versioning scheme pulled in by Kinetis
	  chip.h.

	  The motvations is to version the IP blocks of the Kinetis K series
	  family of parts.

	  This added versioning and configuration features for the Kinetis SIM IP
	  block.

	  It is envisioned that in the long term as a chip is added.  The author
	  of the new chip definitions will either find the exact configuration in
	  an existing chip define and add the new chip to it Or add the SIM
	  feature configuration #defines to the chip ifdef list in
	  arch/arm/include/kinetis/kinetis_sim.h  In either case the author should
	  mark it as "Verified to Document Number:"  taken from the reference
	  manual.

	  The version KINETIS_SIM_VERSION_UKN has been applied to most all the
	  SoCs in the kinetis arch prior to this commit.

	  The exceptions are the CONFIG_ARCH_CHIP_MK60FN1M0VLQ12, All K64 and K66
	  which not have Verified SIM configurations.

	  From David Sidrane (2017-02-21).
	* Created a kinetis PMC versioning scheme pulled in by Kinetis chip.h.

	  The motivation is to version the IP blocks of the Kinetis K series
	  family of parts.  This added versioning and configuration features for
	  the Kinetis PMC IP block. It is envisioned that in the long term as a
	  chip is added. The author of the new chip definitions will either find
	  the exact configuration in an existing chip define and add the new chip
	  to it Or add the PMC fature configuration #defines to the chip ifdef
	  list in arch/arm/include/kinetis/kinetis_pmc.h  In either case the
	  author should mark it as "Verified to Document Number:"  taken from the
	  reference manual.

	  The version KINETIS_PMC_VERSION_UKN has been applied to most all the
	  SoCs in the kinetis arch prior to this commit.

	  The exceptions are the CONFIG_ARCH_CHIP_MK60FN1M0VLQ12,
	  CONFIG_ARCH_CHIP_MK20DXxxxVLH7 All K64 and K66 have been verified PMC
	  configurations.  From David Sidrane (2017-02-22).
	* Kinetis: kinetis_clockconfig uses the correct ACKISO. ACKISO is located
	  in the PMC_REGSC on the majority of the Kinetis SoCs. With the exception
	  of the MK40DXxxxZVLQ10 where ACKISO is located in LLWU_CS (2017-02-22).
	* Kinetis: Refactor you use SIM_SOPT2_PLLFLLSEL, added warning. The
	  warning has been added because: SIM_SOPT2_PLLFLLSEL is a clock selection
	  that may feed many clock subsystem:  USB, TPM, SDHCSRC, LPUARTSRC.
	  Therefore, there needs to be a global board level setting to select  the
	  source for SIM_SOPT2_PLLFLLSEL and then  derive all the  sub selections
	  and proper fractions/divisors for each modules clock.  From David
	  Sidrane (2017-02-22).
	* Add support to QEncoder on STM32F103Minimum board.   From Alan Carvalho
	  de Assis (2017-02-23).
	* Olimex STM32 p407:  Add external SRAM support.  Unfortunately not usable
	  or testable unless you also disable the serial console (2017-02-23).
	* drivers/spi/Kconfig:  There is too much SPI in the configuration menu;
	  SPI Driver Support menu is empty.  From Maciej Wójcik (2017-02-23).
	* Kinetis:  SIM add paramiterized SIM_CLKDIVx_xxFRAC|DIV macros. The makes
	  for cleaner board definitions.  From David Sidrane (2017-02-23).
	* kinetis_enet.c add #define for number of loops for auto negotiation to
	  complete.  From Marc Rechté (2017-02-23).
	* STM32F4 Discovery: Fix issues with QEncoder support.  From Alan Carvalho
	  de Assis (2017-02-23).
	* sigtimedwait:  When timer expires, up_unblock_task() is called.  This is
	  okay in the single CPU case because interrupts are disable in the timer
	  interrupt handler.  But it is insufficient in the SMP case.  enter_ and
	  leave_critical_section() must be called in order to manage spinlocks
	  correctly (2017-02-23).
	* Fix QEncoder driver, based on STM32L4 driver.  From Alan Carvalho de
	  Assis (2017-02-23).
	* STM32 QEncoder.  Enable clocking to the timer on QE setup; disable clock
	  on QE teardown (2017-02-23).
	* Kinetis:  Extend clockconfig to support SOPT2_PLLFLLSEL and
	  SIM_CLKDIV3.  A board.h file can now specify the: 1)
	  BOARD_SOPT2_PLLFLLSEL to select the output of the SIM_SOPT2 MUX from:
	  MCGFLLCLK, MCGPLLCLK, USB1PFD, and IRC48MHZ.  2) If it defines
	  BOARD_SIM_CLKDIV3_FREQ then it must define BOARD_SIM_CLKDIV3_PLLFLLFRAC
	  and BOARD_SIM_CLKDIV3_PLLFLLDIV which wil be used to cpnfigure
	  SIM_CLKDIV3 [PLLFLLFRAC, PLLFLLDIV].  From David Sidrane (2017-02-23).
	* Kinetis serial:  Added configurable 1|2 stop bits. HAVE_SERIAL_CONSOLE
	  -> HAVE_UART_CONSOLE to be consistent with HAVE_LPUART_CONSOLE naming.
	  From David Sidrane (2017-02-23).
	* Kinetis:  Add LPUART serial driver and Clock configuartaion to
	  freedom-k66f board.  Pin out LPUART0 for testing.  Define
	  BOARD_SOPT2_PLLFLLSEL ti select MCGPLLCLK.  Define
	  BOARD_SIM_CLKDIV3_FREQ etal to provide BOARD_LPUART0_FREQ.  From David
	  Sidrane (2017-02-25).
	* QEncoder: Add mechanism to assure that architecture-specific IOCTL
	  commands do not overlap (2017-02-25).
	* include/nuttx/analog:  Add an ioctl.h header file to coordinate analogic
	  driver IOCTL commands (2017-02-25).
	* CAN: Add infrastructure to assure that all CAN IOCTL commands are
	  uniquely numbered (2017-02-25).
	* Wireless and TSC: Add infrastructure to assure that all IOCTL commands
	  are uniquely numbered (2017-02-25).
	* Add basic support for the STM32F334 and Nucleo F334R8 board.  From
	  Mateusz Szafoni (2017-02-16).
	* SAM3/4: GPIO bit numbering typo fixes.  From Wolfgang Reißnegger
	  (2017-02-26).
	* Add SDCard support over SPI on STM32F103-Minimum board.  From Alan
	  Carvalho de Assis (2017-02-26).
	* option to enable Memory Card debug output was hidden with SD cards
	  connected through SPI.   From Maciej Wójcik (2017-02-27).
	* Kinetis serial:  Fixed up_rxint - did not disable the RX interuppts.
	  There was an OR where and AND NOT was needed.  From David Sidrane
	  (2017-02-27).
	* Kinetis:Add the configuring SIM_CLKDIV2[USBFRAC, USBDIV] in
	  kinetis_clockconfig.    If a board.h provides BOARD_SIM_CLKDIV2_FREQ it
	  will configure the SIM_CLKDIV2 based on the additional provided
	  BOARD_SIM_CLKDIV2_USBFRAC and BOARD_SIM_CLKDIV2_USBDIV.  The reason for
	  doing this globaly is that the output the SIM_CLKDIV2 divisor may be
	  also used for other IP blocks in future configurations (as is done for
	  SIM_CLKDIV3).   From David Sidrane (2017-02-27).
	* Kinetis:  Refactor clocking in kinetis_usbdev.  (1) Removed
	  SIM_CLKDIV2[USBFRAC, USBDIV] setting as it is now, done in
	  kinetis_clockconfig, (2) Use BOARD_USB_CLKSRC to select the clock source
	  to the USB block, (3) Removed CONFIG_TEENSY_3X_OVERCLOCK from the driver
	  as the board.h will now provide BOARD_SIM_CLKDIV2_USBDIV and
	  BOARD_SIM_CLKDIV2_USBFRAC to the kinetis_clockconfig.  From David
	  Sidrane (2017-02-27).
	* Kinetis:  Use BOARD_xxxx to drive system clocking: (1) Shifted the clock
	  speed of MK20DX128VLH5 to 48 Mhz to be able to uses USB. (2) Set
	  BOARD_OUTDIV3 to 0 - there is no BOARD_OUTDIV3 on a MK20DX128VLH5 or
	  K20DX256VLH7, (3) Added BOARD_SOPT2_PLLFLLSEL and BOARD_SOPT2_FREQ along
	  with settings for BOARD_SIM_CLKDIV2_USBFRAC and BOARD_SIM_CLKDIV2_USBDIV
	  base on the BOARD_SOPT2_FREQ.  From David Sidrane (2017-02-27).
	* Kinetis:  Define uart and lpuart versions of [early]serialinit.  Add
	  serial init to centralize UART/LPUART management.  Use kinetis_ not up_
	  where arch specific.  Defined kinetis_[lp]uart_[early]serialinit to
	  facilitate bring up both UARTs and LPUARTs as devices and a console.
	  Support ordering and merging of serial devices names.  From David
	  Sidrane (2017-02-27).
	* Adapt more drivers to utilize the IRQ argument feature (2107-02-28).
	* irq_attach() and type xcpt_t.  irq_attach now accepts a argument that
	  will be provided to the interrupt handler when the interrupt ocurrs.
	  This affects many files by replace ad hoc parameter passing logic with a
	  standardized approach.  From Mark Schulte (2017-03-01).
	* Fix open() a block device with CONFIG_DISABLE_PSEUDOFS_OPERATIONS=y.
	  From Masayuki Ishikawa (2017-03-01).
	* net/:  Fixed a nullptr-dereference on iob_clone.  From Pascal Speck
	  (2017-03-01).
	* configs/: All functions that used to return an xcpt_t old handler value,
	  not return NULL.  The oldhandler value is no longer useful with the
	  recent changes to the interrupt argument passing (2017-03-02).
	* arch_phy_irq:  Now returns int instead of xcpt_t oldhandler.  The
	  oldhandler is useless after the changes to the interrupt argument.  Also
	  access an argument for the PHY interrupt.  phy_notify.c driver changed
	  to exploit new interrupt argument passing (2017-03-02).
	* STM32/F7/L4: EXTI PVD function no longer returns the xcpt_t oldhandler.
	  There value is useless and dangerous after the recent changes to
	  interrupt argument passing (2017-03-02).
	* STM3 L4: EXTI COMP function no longer returns the xcpt_t oldhandler.
	  There value is useless and dangerous after the recent changes to
	  interrupt argument passing (2017-03-02).
	* STM32/F7/L4: EXTI ALARM function no longer returns the xcpt_t
	  oldhandler.  There value is useless and dangerous after the recent
	  changes to interrupt argument passing (2017-03-02).
	* Add support to USB Device on STM32F103-Minimum board.  From Alan
	  Carvalho de Assis (2017-03-02).
	* Kinetis GPIO: Pin IRQ logic no longer returns the xcpt_t oldhandler.
	  There value is useless and dangerous after the recent changes to
	  interrupt argument passing (2017-03-02).
	* STM32 Ethernet: Need two work structures so that pending poll work is
	  not lost when an interrupt occurs (2017-03-02).
	* Kinetis-L GPIO: Pin IRQ logic no longer returns the xcpt_t oldhandler.
	  There value is useless and dangerous after the recent changes to
	  interrupt argument passing (2017-03-02).
	* PIC32MX: Pin IRQ logic no longer returns the xcpt_t oldhandler.  There
	  value is useless and dangerous after the recent changes to interrupt
	  argument passing (2017-03-02).
	* PIC32MZ: Pin IRQ logic no longer returns the xcpt_t oldhandler.  There
	  value is useless and dangerous after the recent changes to interrupt
	  argument passing (2017-03-02).
	* STM32 L4: Pin IRQ logic no longer returns the xcpt_t oldhandler.  There
	  value is useless and dangerous after the recent changes to interrupt
	  argument passing (2017-03-02).
	* Tiva: Pin IRQ logic no longer returns the xcpt_t oldhandler.  There
	  value is useless and dangerous after the recent changes to interrupt
	  argument passing (2017-03-02).
	* board_button_irq: Button IRQ logic no longer returns the xcpt_t
	  oldhandler.  There value is useless and dangerous after the recent
	  changes to interrupt argument passing (2017-03-02).
	* stm32_gpiosetevent: GPIO IRQ logic no longer returns the xcpt_t
	  oldhandler.  This value is useless and dangerous after the recent
	  changes to interrupt argument passing (2017-03-02).
	* Implements support for smaller interrupt tables as described at
	  http://www.nuttx.org/doku.php?id=wiki:howtos:smallvectors .  This is
	  largely the work of Mark Schulte.  However, I have made several changes
	  to match with the Wiki document.  If you like the change, thanks go to
	  Marc.  For any errors you can blame me (2017-03-03).
	* Experimental change to STM32 Ethernet driver a success.  Porting change
	  to all other Ethernet drivers (2017-03-03).
	* FS: Don't build block driver proxy if PSEUDOFS_OPERATIONS are disabled
	  (2017-03-04).
	* drivers/net:  Add framework for serialization in the case where multiple
	  low-priority work queues are used (2017-03-04).
	* net/drivers/skeleton.c:  Back out serialization changes of the last
	  commit.  They are not necessary in the skeleton.c example because the
	  calls to net_lock() at the beginning of each worker function will
	  enforce serialization (2017-03-04).
	* STM32F33XX DAC, OPAMP, COMP and ADC headers.   From Mateusz Szafoni
	  (2017-03-04).
	* STM32 F7 SDMMC: Use new interrupt argument facility (2017-03-05).
	* stm32f33xxx: Add HRTIM header file.  From  Mateusz Szafoni (2017-03-05).
	* sendfile():  Fix error introduced with commit
	  ff73be870e38959b0aaee5961dc47b4b58dc2d86.  Noted by Maciej Wójcik
	  (2017-03-05).
	* Kinetis:  Eliminate warning when USE_EARLYSERIALINIT is not defined
	  (2017-03-05).
	* STM3210E-EVAL: Eliminte a warning.  Return type of board_button_irq is
	  now type int (2017-03-05).
	* dk-tm4c129x: Remove warning for variable that is set but not used
	  (2017-03-05).
	* SAMA5D4-EK:  Eliminate warning.  Correct type of return value
	  (2017-03-05).
	* STM32F103 Minimum: Eliminate warning stm32_usbdev.o givne twice in same
	  rule (2017-03-05).
	* STM32 OTGHS host:  stm32_in_transfer() fails and returns NAK if a
	  short transfer is received.  This causes problems from class drivers
	  like CDC/ACM where short packets are expected.  In those protocols,
	  any transfer may be terminated by sending short or NUL packet.  From
	  Janne Rosberg.  Adapt Janne Rosberg's patch to STM32 OTGHS host to
	  OTGFS host, and to similar USB host implementations for STM32 L4 and
	  F7 (2017-03-07).
	* usbhost_cdcacm:  Fix tx outbuffer overflow and remove now invalid
	  assert.  From Janne Rosberg (2017-03-07).

7.21 2017-06-05 Gregory Nutt <gnutt@nuttx.org>

	* tools/kconfig2html:  Need to increase the maximum number of default
	  values (2017-03-08).
	* C library:  Add strerror_r() (2017-03-08).
	* C Library: Add wcstoull(), swprintf(), wcstod(), wcstof(), wcstol(),
	  wcstold(), wcstoul(), wcstoll() functions.  Add mbsnrtowcs() and
	  wcsnrtombs() (just returning success).  Add mbtowc() and wctomb() to
	  C++ std namespace.  From Alan Carvalho de Assis (2017-03-08).
	* Kinetis:  Fixed GPIO _PIN_OUTPUT_LOWDRIVE swapped with
	  _PIN_OUTPUT_OPENDRAIN.  From David Sidrane (2017-03-08).
	* Ensure interrupts are back on BEFORE running code dependant on
	  clock_systimer.  From David Sidrane (2017-03-08).
	* Enable compilation of libc++ same way as uClibc++.  From Alan
	  Carvalho de Assis (2017-03-08).
	* Add LPC4337FET256.  From Andreas Bihlmaier (2017-03-09).
	* Change Kconfig type of ADC0_MASK from hex to int; add ADC driver
	  options to lpc43xx.  From Andreas Bihlmaier (2017-03-09).
	* Add missing PINCONF_INBUFFER in several places of
	  lpc4310203050_pinconfig.h.  From Andreas Bihlmaier (2017-03-09).
	* Rename LPC43_GPDMA_GLOBAL_CONFIG (already slipped previous commit C
	  file); fix GPDMA_CONTROL_SBSIZE_*, improve usability of
	  GPDMA_CONTROL_{S,D} macros.  From Andreas Bihlmaier (2017-03-09).
	* Fix errors in LPC43 SCT and SGPIO headers.  From Andreas Bihlmaier
	  (2017-03-09).
	* Fix logic error in lpc43_adc.  From Andreas Bihlmaier (2017-03-09).
	* Fix logic in preprocessor checks and correct arguments to
	  lpc43_pin_config initialization.  From Andreas Bihlmaier (2017-03-09).
	* Use correct macro for irqid (fortunately both point to
	  LPC43_IRQ_EXTINT+18).  From Andreas Bihlmaier (2017-03-09).
	* Actually write modified value to register.  From Andreas Bihlmaier
	  (2017-03-09).
	* Increase number of supported PWM channels from 4 to 6.  From Andreas
	  Bihlmaier (2017-03-09).
	* Fix as5048b by adding missing frequency parameter.  From Andreas
	  Bihlmaier (2017-03-09).
	* Kinetis:  Allow Board to add Pullups on SDHC lines.  From David
	  Sidrane (2017-03-09).
	* EZ80F910200KITG: Missing support logic in configs/Kconfig (2017-03-09).
	* Olimex-STM32-P407:  Update USB host support (2017-03-09).
	* Olimex STM32 P407:  USB host support for USB FLASH sticks is now
	  supported in the base nsh configuration (2017-03-09).
	* STM32, STM32 F7, and STM32 L4:  Back out part of
	  3331e9c49aaaa6dcc3aefa6a9e2c80422ffedcd3.  Returning immediately in
	  the case of a NAK makes the Mass Storage Class driver unreliable.
	  The retry/timeout logic is necessary.  This implementation tries to
	  implement a compromise:  If a NAK is received after some data is
	  received, then the partial data received is returned as with
	  3331e9c49aaaa6dcc3aefa6a9e2c80422ffedcd3.  If if a NAK is received
	  with no data, then no longer returns the NAK error immediately but
	  retries until data is received or a timeout occurs.  Initial testing
	  indicates that this fixes the issues the MSC.  However, I have
	  concerns that if multiple sectors are read in one transfer, there
	  could be NAKs between sectors as well and, in that case, then change
	  will still cause failures (2017-03-09).
	* STM32F2:  Add USB OTG HS support for stm32f20xxx cores.  From Simon
	  Piriou (2017-03-09).
	* Remove all references to arch_usbhost_initialize().  That was
	  incorrectly called from apps/examples/hidkbd.  That is violation of
	  the OS interfacing rules and will no longer be supported.  USB host
	  should be initialized as part of the board bring-up logic was with
	  any other devices and should not involve illegal calls from
	  applications into the OS (2017-03-09).
	* STM32, STM32 F7, STM32 L4:  OTG host drivers: Do not do data toggle
	  if interrupt transfer is NAKed.  Sugested by webbbn@gmail.com
	  (2017-03-09).
	* apps/examples/usbterm is gone because it can be configured to perform
	  an illegal call into the OS.  Remove all traces of
	  CONFIG_EXAMPLES_USBTERM* and all of the illegal device support
	  (2017-03-09).
	* Save elapsed time before handling I2C in stm32_i2c_sem_waitstop().
	  This patch follows the same logic as in previous fix to
	  stm32_i2c_sem_waitdone().  It is possible that a context switch
	  occurs after I2C registers are read but before elapsed time is saved
	  in stm32_i2c_sem_waitstop(). It is then possible that the registers
	  were read only once with "elapsed time" equal 0. When scheduler
	  resumes this thread it is quite possible that now "elapsed time" will
	  be well above timeout threshold. In that case the function returns
	  and reports a timeout, even though the registers were not read
	  "recently". Fix this by inverting the order of operations in the loop
	  - save elapsed time before reading registers. This way a context
	  switch anywhere in the loop will not cause an erroneous "timeout"
	  error.  From Freddie Chopin (2017-03-10).
	* pthreads:  Fix pthread_mutexattr_init().  It was not initializing the
	  protocol field when priority inheritance is enabled (2017-03-10).
	* Priority inheritance:  When CONFIG_SEM_PREALLOCHOLDERS==0, there is
	  only a single, hard-allocated holder structure.  This is problem
	  because in sem_wait() the holder is released, but needs to remain in
	  the holder container until sem_restorebaseprio() is called.  The call
	  to sem_restorebaseprio() must be one of the last things the
	  sem_wait() does because it can cause the task to be suspended. If in
	  sem_wait(), a new task gets the semaphore count then it will fail to
	  allocate the holder and will not participate in priority
	  inheritance.  This fix is to add two hard-allocated holders in the
	  sem_t structure:  One of the old holder and one for the new holder
	  (2017-03-10).
	* STM32, STM32 F7, and STM32 L4:  Clone Freddie Chopin's I2C change to
	  similar STM32 I2C drivers.  From David Sidrane (2017-03-10).
	* Priority Inversion fixes:  Initalization.  From David Sidrane
	  (2017-03-10).
	* configs:  Add Particle Photon board support.  From Simon Piriou
	  (2017-03-10).
	* tools/testbuild.sh:  Add debug option (-d) (2017-03-10).
	* multiple fixes in nrf24l01 driver:  (1) signal POLLIN if there is
	  already data in the FIFO, (2) send ETIMEDOUT to userspace after 2
	  seconds if TX IRQ was not received, (3) handle FIFO overflow, (4)
	  handle invalid pipes/empty FIFO, and (5) multiple cosmetics (missing
	  static, duplicate define, missing \n).  From Leif Jakob (2017-03-10).
	* STM32 F33 ADC:  Correct bad definitions of base addresses;  Fix
	  naming collision by changing colliding STM32_ADC12_BASE to
	  STM32_ADC12_CMN_BASE (2017-03-10).
	* photon:  Add iwdg timer support.  From Simon Piriou (2017-03-11).
	* photon:  Add usb otg hs support and usbnsh app.  From Simon Piriou
	  (2017-03-11).
	* photon:  Add LEDs and BUTTONS support.  From Simon Piriou (2017-03-11).
	* As discovered by dcabecinhas.  This fix assume the 8 byte alignment
	  options for size stack size or this will overwrite the first word
	  after TOS.  See
	  https://github.com/PX4/Firmware/issues/6613#issuecomment-285869778.
	  From David Sidrane (2017-03-11).
	* STM32F20xxx:  Add BOARD_DISABLE_USBOTG_HSULPI flag.  From Simon
	  Piriou (2017-03-11).
	* STM32:  Propagate STM32 F2 changes of last PR to STM32 F4 and F7
	  OTGHS (2017-03-11).
	* STM32 OTG HS:  A little research reveals that only the F2 RCC
	  initialization set the OTGHSULPIEN bit and Photon is the only F2
	  board configuration that uses OTG.  Therefore, we can simplify the
	  conditional logic of the last PR.  Negative logic was used (#ifndef
	  BOARD_DISABLE_USBOTG_HSULPI) to prevent bad settings in other
	  configurations.  But giveh these facts, the preferred positive logic
	  now makes more sense (#ifdef BOARD_ENABLE_USBOTG_HSULPI) (2017-03-11).
	* STM32:  OTG host implementations of stm32_in_transfer() must obey the
	  polling interval for the case of isochronous and interrupt endpoints
	  (2017-03-12).
	* Photon:  Add basic support for wlan chip.  From Simon Piriou
	  (2017-03-12).
	* Networking:  Add registration support for integrated ieee80211
	  wireless drivers.  Rename CONFIG_IEEE802154 to
	  CONFIG_WIRELESS_IEEE8021514 following the convention of including the
	  location of the configuration variable as a part of its name
	  (2017-03-12).
	* If whence is SEEK_END, the file offset shall be set to the size of
	  the file plus offset. Noted by eunb.song@samsung.com (2017-03-13).
	* Move IEEE 802.11 wireless IOCTLs from include/nuttx/net/ioctl to
	  include/nuttx/wireless/wireless.h.  Add some Linux compatible
	  structures to use with the IOCTL commands. (2017-03-13).
	* semaphore:  sem_holder sem_findholder missing inintalization of
	  pholder.  sem_findholder would fail and code optimization covered
	  this up.  From David Sidrane (2017-03-13).
	* Partial Fix priority inheritance CONFIG_SEM_PREALLOCHOLDERS=0.  From
	  David Sidrane (2017-03-13).
	* semaphore:  sem_boostholderprio prevent overrun of pend_reprios.  The
	  second case rtcb->sched_priority <= htcb->sched_priority did not
	  check if there is sufficient space in the pend_reprios array.  From
	  David Sidrane (2017-03-13).
	* Include C++ library to 'make export'.  From Alan Carvalho de Assis
	  (2017-03-13).
	* arch/arm/src/xmc4:  Initial, partial support for Infineon XMC4xxx
	  (2017-03-14).
	* photon:  Porting wlan device.  From Simon Piriou (2017-03-14).
	* lp_worker:  Guard from pend_reprios overlow.  From David Sidrane
	  (2017-03-15).
	* wireless/ieee802154: Renamed file ieee802154_device to
	  radio802154_device.  From Anthony Merlino (2017-03-15).
	* Add option to enable wireless debug output (2017-03-15).
	* wireless/ieee802.15.4:  Refactors ieee802154_dev character driver to
	  be radio802154_device.  From Anthony Merlino (2017-03-15).
	* Integrate use of new wireless debug macros.  Replace ad hoc debug
	  macros.  Convert obsolete dbg() macros to current info(), warn(),
	  err() macros (2017-03-15).
	* sem_holder: Fixes improper restoration of base_priority in the case
	  of CONFIG_SEM_PREALLOCHOLDERS=0.  The call to
	  sem_restorebaseprio_task context switches in the
	  sem_foreachholder(sem, sem_restoreholderprioB, stcb); call prior to
	  releasing the holder. So the running task is left as a holder as is
	  the started task. Leaving both slots filled thus failing to perform
	  the boost/or restoration on the correct tcb.  This PR fixes this by
	  releasing the running task slot prior to reprioritization that can
	  lead to the context switch.  To faclitate this, the interface to
	  sem_restorebaseprio needed to take the tcb from the holder prior to
	  the holder being freed. In the failure case where sched_verifytcb
	  fails it added the overhead of looking up the holder.  There is also
	  the additional thunking on the foreach to get from holer to
	  holder->tcb.  An alternate approach could be to leve the interface
	  the same and allocate a holder on the stack of sem_restoreholderprioB
	  copy the sem's holder to it, free it as is done in this pr and and
	  then pass that address sem_restoreholderprio as the holder. It could
	  then get the holder's tcb but we would keep the same sem_findholder
	  in sched_verifytcb.  From David Sidrane (2017-03-15).
	* ARM:  Remove redundant interrupt stack coloring.  From David
	  Cabecinhas (2017-03-16).
	* ARM:  Set EABI stack alignment for all ARM architectures (remove OABI
	  code).  From David Cabecinhas (2017-03-16).
	* Remove redundant interrupt stack coloring and OABI code.  From David
	  Cabecinhas (2017-03-16).
	* Fixed descritpions of NUC100/120.  From no1wudi (2017-03-16).
	* XMC4500 Relax:  Add basic board support infrastructure of Infineon
	  XMC4500 Relax Lite v1 (2017-03-16).
	* Fix mksyscall host binary name.  From Alan Carvalho de Assis
	  (2017-03-16).
	* sem_holder:  The logic for the list version is unchanged.  From David
	  Sidrane (2017-03-16).
	* sem_holder:  Fixes improper restoration of base_priority.  From David
	  Sidrane (2017-03-17).
	* C Library: printf:  Fix precision for string formatting.  Fixes use
	  of format precision to truncate input string.  From Jussi Kivilinna
	  (2017-03-17).
	* vsnprintf():  If size is zero, then vsnprintf() should return the
	  size of the required buffer without writing anything.  This is same
	  fix that was done for snprintf in 2014 by commit
	  59846a8fe928abb389e3776ebdbb52022da45be3.  From Jussi Kivilinna
	  (2017-03-17).
	* Adds driver support for the XBox One controller.  Currently only the
	  latest version (XBox One X) controller works.  The older XBox One
	  controllers do not enumerate correctly.  From Brian Webb (2017-03-17).
	* USB Host driver for the XBox One game controller.  From Brian Webb
	  (2017-03-18).
	* ARM: Fix off-by-one interrupt stack allocation in 8-byte aligned
	  architectures.  From David Cabecinhas (2017-03-18).
	* configs/nucleo_f334r8:  Add ADC example.  From Mateusz Szafoni
	  (2017-03-18).
	* mtd/progmem:  Fix incorrect target address calculation.
	  progmem_read/write() is incorrectly calculating the target address,
	  expecting the offset argument is given in a block number. This is
	  completely wrong and as a result invalid flash region is accessed.
	  Byte-oriented read/write interfaces of mtd device accept the target
	  address in a byte offset, not a block number.  From Heesub Shin
	  (2017-03-18).
	* STM32F33: Move DMA logic to a separate files + add ADC support.  From
	  Mateusz Szafoni (2017-03-18).
	* Nucleo-F334R8: Add COMP support.  From Mateusz Szafoni (2017-03-19).
	* STM32F3:  Add COMP support.  From Mateusz Szafoni (2017-03-19).
	* XMC4xxx/XMC4500 Relax:  First, clean build of basic NSH configurtion
	  (2017-03-20).
	* XMC4500-Relax:  Add LED support (2017-03-20).
	* input/mxt:  Prevent overriding i2c transfer return value.
	  put_reg/get_reg function was overriding i2c transfer error code with
	  i2creset return value, that lead to OK status although actual
	  transfer failed.  From Juha Niskanen (2017-03-21).
	* drivers/audio/wm8904:  WM8904 has same problem as that fixed by Juha
	  Niskanen in the MaxTouch driver (2017-03-21).
	* drivers/lcd/st7565.c:  Extend to include support for the AQM_1248A.
	  From Masayuki Ishikawa (2017-03-21).
	* Fixed wrong assert on udp dgram send.  From Pascal Speck (2017-03-21).
	* sem_holder:  Indexing error.  From David Sidrane (2017-03-21).

	    if (sem->holder[0].htcb != NULL || sem->holder[**1**].htcb != NULL)
	* sched/semaphore: Convert strange use of DEBUGASSERT to DEBUGPANIC
	  (2017-03-21).
	* sched/semaphore: Fix a warning aout an unused variable when priority
	  inheritance is enabled (2017-03-21).
	* Clicker2-STM32: Add support for Mikroelektronika Clicker 2 for
	  STM32.  From Anthony Merlino (2017-03-21).
	* Implement DMA support for the stm32f4 I2C.  Max and I have verified
	  that it works on our systems.  From Rajan Gill (2017-03-21).
	* drivers/lcd/st7565.c:  Use ST7565_POWERCTRL_INT instead of
	  ST7565_POWERCTRL_BRF.  From Masayuki Ishikawa (2017-03-21).
	* SMP Kconfig: Change the minimum SMP_NCPUS to 1.  From Masayuki
	  Ishikawa (2017-03-21).
	* SMP: Setting CONFIG_SMP_NCPUS=1 should only be permitted in a debug
	  configuration (2017-03-22).
	* Clicker2-STM32:  Create src/, kernel/, and scripts/ directories
	  (2017-03-22).
	* Clicker2-STM32:  Add an NSH configuration (2017-03-22).
	* Clicker2 STM32:  Add SPI support (2017-03-22).
	* XMC4xxx:  Add FPU support.  From David S. Alessio (2017-03-22).
	* Clicker2-STM32: Add definitions for remaining mikroBUS pins
	  (2017-03-22).
	* STM32:  Fix erase sector number for microcontrolers with more than 11
	  sectors.  Erase a sector from the second bank cause the bit 4 of SNB
	  being set but never unsed, so trying to erase a sector from the first
	  bank was acually eraseing a sector from the second bank.  From José
	  Roberto de Souza (2017-03-22).
	* STM32:  Make up_progmem thread safe.  Writing to a flash sector while
	  starting the erase of other sector have a undefined behavior so lets
	  add a semaphore and syncronize access to Flash registers.  But for
	  the semaphore to work it needs to be initialized so each board needs
	  call stm32_flash_initialize() on initialization, so to avoid runtime
	  problems it is only using semaphore and making it thread safe if
	  initialized, after all boards starts to call stm32_flash_initialize()
	  we can remove the boolean and the check.  From José Roberto de Souza
	  (2017-03-22).
	* STM32:  Add workaround for flash data cache corruption on
	  read-while-write.  This is a known hardware issue on some STM32 see
	  the errata of your model and if you make use of both memory banks you
	  should enable it.  From José Roberto de Souza (2017-03-22).
	* Clicker2-STM32: Add framework for MRF24J40 support.  Untested and
	  still some missing logic (2017-03-22).
	* STM32 Flash fixes.  From José Roberto de Souza (2017-03-22).
	* STM32F7:  In stm32_allocateheap.c There are 5 not 4 configurations.
	  From David Sidrane (2017-03-23).
	* Clicker2-STM32:  Add logic to register the MRF24J40 radio character
	  device (2017-03-23).
	* Clicker2-STM32:  Add some mostly bogus MAC initializatinon logic
	  (2017-03-23).
	* STM32 I2C:  Do not allow CONFIG_I2C_POLLED and CONFIG_I2C_DMA.  From
	  Rajan Gill (2017-03-23).
	* stm32_flash:  Need conditinal on non F4 targets.  From David Sidrane
	  (2017-03-23).
	* stm32_i2c_alt:  Duplicate non CS dev of regval.  From David Sidrane
	  (2017-03-23).
	* stm32f40xxx_i2c:  Duplicate non CS dev of regval.  From David Sidrane
	  (2017-03-23).
	* stm32_i2c_alt:  Move def of regval to top func def per CS.  From
	  David Sidrane (2017-03-31).
	* stm322_flash:  Missing unlock on F1 HSI off path.  From David Sidrane
	  (2017-03-24).
	* Fix compile error when disabled the flash data cache corruption for
	  stm32 f1xx.  From no1wudi (2017-03-24).
	* The interrupt occurs over the counter overflow.  From Aleksandr
	  Vyhovanec (2017-03-24).
	* I needed to use DS3231, I remember that in past it worked ok, but now
	  for stm32f4xx is used another driver (chip
	  specific, stm32f40xxx_i2c.c) and DS3231 driver doesn't work.  After
	  investigating a problem I found that I2C driver (isr routine) has a
	  few places there it sends stop bit even if not all messages are
	  managed. So, e.g., removing stm32_i2c_sendstop (#1744) and adding
	  stm32_i2c_sendstart after data reading helps to make DS3231 working.
	  From  Alexander Oryshchenko; verified by David Sidrane (2017-03-24).
	* wireless/ieee802154:  Adds IOCTL definitions for accessing PHY
	  layer.  From Anthony Merlino (2017-03-24).
	* Add ffsl(), ffsll(), fls(), flsl(), flsll() and use GCC's
	  __builtin_ctz/__builtin_clz for faster implementation of these.  From
	  Jussi Kivilinna (2017-03-24).
	* MRF24J40/Clicker2:  Add an MRF24J40 radio configuration to the
	  Clicker2 STM32 board.  Fix a few errors discovered during build
	  (2017-03-24).
	* configs/:  Rename all stm32_wireless.c files to stm32_cc3000.c
	  (2017-03-24).
	* configs/:  Rename all xyz_wifi.c files to stm32_cc3000.c (2017-03-24).
	* Clicker2-STM32:  Add usbnsh configuration (2017-03-25).
	* drivers/analog:  Add basic COMP driver.  From Mateusz Szafoni
	  (2017-03-25).
	* STM32F33:  Support for COMP character driver.  From Mateusz Szafoni
	  (2017-03-25).
	* Nucleo-F334R8:  Use new COMP driver.  From Mateusz Szafoni
	  (2017-03-25).
	* stm32/Kconfig:  Update COMP and OPAMP definitions.  From Mateusz
	  Szafoni (2017-03-26).
	* pthreads:  Add more robustness characteristics: pthread_mutex_lock()
	  and trylock() will now return EOWNERDEAD if the mutex is locked by a
	  thread that no longer exists.  Add pthread_mutex_consistent() to
	  recover from this situation (2017-03-26).
	* pthread:  Fix return value of pthread_give/takesemaphore().  Add
	  option to pthread_takesemaphore to ignore EINTR or not (2017-03-26).
	* pthreads:  Partial implementation of final part of robust mutexes:
	  Keep list of all mutexes held by a thread in a list in the TCB
	  (2017-03-26).
	* when pthread exits or is cancelled, mutexes held by thread are marked
	  inconsistent and the highest priority thread waiting for the mutex is
	  awakened (2017-03-26).
	* pthreads:  Add a configuration option to disable robust mutexes and
	  revert to the traditional unsafe mutexes (2017-03-26).
	* pthread mutexes:  Add option to support both unsafe and robust
	  mutexes via pthread_mutexattr_get/setrobust() (2017-03-26).
	* pthread mutexes:  Finish logic to support configuration mutex
	  robustness (2017-03-27).
	* Rename CONFIG_MUTEX_TYPES to CONFIG_PTHREAD_MUTEX_TYPES (2017-03-27).
	* Make sure that CONFIG_PTHREAD_MUTEX_ROBUST=y is selected every
	  configuration that enabled pthreads (2017-03-27).
	* Add syscall support for pthread_mutex_consistent() (2017-03-27).
	* Include wcstold in C++ cwchar header file.  From Alan Carvalho de
	  Assis (2017-03-27).
	* AT86RF23x:  Clean-up, standardize lower half interface.  Take
	  advantage of new OS features for interrupt parameter passing
	  (2017-03-27).
	* MRF24J40: Take advantage of new OS features for interrupt parameter
	  passing (2017-03-27).
	* lcd/:  PCF8574 backpack logic needs to include poll.h
	  CONFIG_DISABLE_POLL is not set (2017-03-27).
	* drivers/analog:  Add driver for the LTC1767L ADC.  From Martin
	  Lederhilger (2017-03-28).
	* realloc():  When realloc() has to fall back to calling malloc(), size
	  including overhead was being provided to malloc(), causing a slightly
	  larger allocation than needed.  Noted by initialkjc@yahoo.com
	  (2017-03-28).
	* Fix PTHREAD_MUTEX_INITIALIZER which was not updated with last mutex
	  changes.  From Jussi Kivilinna (2017-03-28).
	* STM32 F7:  Add stm32 RNG support.  This is copied from stm32l4.
	  Tested on STM32F746ZG board.  From Juha Niskanen (2017-03-29).
	* STM32 RNG:  Fix semaphore initial value and disable priority
	  inheritance.  From Juha Niskanen (2017-03-29).
	* Fix an assertion noted by Jussi Kivilinna.  This was a consequence of
	  the recent robust mutex changes.  If robust mutexes are selected,
	  then each mutex that a thread takes is retained in a list in threads
	  TCB.  If the thread exits and that list is not empty, then we know
	  that the thread exitted while holding mutexes.  And, in that case,
	  each will be marked as inconsistent and the any waiter for the thread
	  is awakened.  For the case of pthread_mutex_trywait(), the mutex was
	  not being added to the list!  while not usually a fatal error, this
	  was caught by an assertion when pthread_mutex_unlock() was called:
	  It tried to remove the mutex from the TCB list and it was not there
	  when, of course, it shoule be.  The fix was to add
	  pthread_mutex_trytake() which does sem_trywait() and if successful,
	  does correctly add the mutext to the TCB list.  This should
	  eliminated the assertion (2017-03-29).
	* 6LoWPAN: IEEE802.15.4 MAC driver will need a special form of the
	  network device structure to manage fragmentation of the large packet
	  into frames (2017-03-29).
	* wireless/ieee802154:  Adds MAC character driver structure.
	  Nonfunctional.  From Anthony Merlino (2017-03-29).
	* configs/clicker2-STM32:  Adds logic to create an 802.15.4 MAC and
	  register a character driver.  From Anthony Merlino (2017-03-29).
	* net/local: connect:  Fix warning with gcc-arm-none-eabi-5-2016q1.
	  Using compiler from gcc-arm-none-eabi-5-2016q1 toolchain:

	    gcc version 5.3.1 20160307 (release) [ARM/embedded-5-branch revision 234589] (GNU Tools for ARM Embedded Processors)

	  gives error:

	    local/local_connect.c:188:7: error: '_local_semtake' is static but used in inline function 'local_stream_connect' which is not static [-Werror]

	  this is due to compiler enforcing ISO/IEC 9899:1999 6.7.4.3:  "An
	  inline definition of a function with external linkage shall not
	  contain a definition of a modifiable object with static storage
	  duration, and shall not contain a reference to an identifier with
	  internal linkage."  Fix by making inlined caller to have internal
	  linkage as well.  From Juha Niskanen (2017-03-30).
	* Add entropy pool and strong random number generator.   Entropy pool
	  gathers environmental noise from device drivers, user-space, etc.,
	  and returns good random numbers, suitable for cryptographic use.
	  Based on entropy pool design from *BSDs and uses BLAKE2Xs algorithm
	  for CSPRNG output.  Patch also adds /dev/urandom support for using
	  entropy pool RNG and new 'getrandom' system call for getting
	  randomness without file-descriptor usage (thus avoiding
	  file-descriptor exhaustion attacks). The 'getrandom' interface is
	  similar as 'getentropy' and 'getrandom' available on OpenBSD and
	  Linux respectively.  From Jussi Kivilinna (2017-03-30).
	* Change STM32 tickless to use only one timer.  From Konstantin
	  Berezenko (2017-03-30).
	* drivers/sensors: Add driver for ST HTS221 humidity sensor.  From Juha
	  Niskanen (2017-03-30).
	* HTS221 driver:  Modify to use new interrupt parameter passing hooks
	  (2017-03-31).
	* drivers/sensors:  Add driver for ST LPS25H pressure sensor.  From
	  Juha Niskanen (2017-03-31).
	* drivers/usbmisc:  Add driver for Fairchild FUSB301 USB type-C
	  controller.  From Harri Luhtala <harri.luhtala@haltian.com>. Tested
	  with earlier version of NuttX; with current version checked that it
	  compiles.  Via Juha Niskane (2017-03-31).
	* Add user-space networking stack API (usrsock).  User-space networking
	  stack API allows user-space daemon to provide TCP/IP stack
	  implementation for NuttX network.  Main use for this is to allow use
	  and seamless integration of HW-provided TCP/IP stacks to NuttX.  For
	  example, user-space daemon can translate /dev/usrsock API requests to
	  HW TCP/IP API requests while rest of the user-space can access
	  standard socket API, with socket descriptors that can be used with
	  NuttX system calls.  From Jussi Kivilinna (2017-03-31).
	* STM32F7:  Add support for LSE RTC and enable RTC subseconds.  From
	  Jussi Kivilinna (2017-03-31).
	* TCP/IPv6: Fix a compile issue when IPv6, but not IPv4 is enabled
	  (2017-03-31).
	* net/:  Fix MULTINIC/MULTILINK selection when 6LoWPAN selected
	  (2017-03-31).
	* net/:  Permit net/neighbor to build when IPv6 is defined, but not
	  Ethernet.  Needs more work to support 6LoWPAN (2017-03-31).
	* stm32f7:  Serial fix for dropped data:  (1) Revert the inherited dma
	  bug from the stm32.  see
	  https://bitbucket.org/nuttx/nuttx/commits/df9ae3c13fc2fff2c21ebdb098c520b11f43280d

	  for details.  And (2) Most all CR1-CR3 settings can not be configured
	  while UE is true. Threfore we make all operation atomic and disable
	  UE and restore it's originalstate on exit.  From David Sidrane
	  (2017-03-31).
	* stm32f7:  stm32_sdmmc removed stray semicolon.  From David Sidrane
	  (2017-03-31).
	* 6LoWPAN: Contiki 6LoWPAN port is now complete (but completely
	  untested) (2017-04-02).
	* iee802154 loopback:  Eliminate dependency on CONFIG_NET_LOOPBACK
	  (2017-04-02).
	* drivers/sensors: Add driver for ST LIS2DH accelerometer.  From Timo
	  Voutilainen <time.voutilainen@haltian.com> et al. via Juha Niskanen
	  (2017-04-03).
	* net/socket/accept:  Fix building with CONFIG_NET_LOCAL_STREAM.  From
	  Jussi Kivilinna (2017-04-03).
	* STM32:  Fix IWDG and WWDG debug mode stop for STM32L15XX.  From Juha
	  Niskanen (2017-04-03).
	* STM32:  Add STM32L162VE to chip.h.  From Juha Niskanen (2017-04-03).
	* iee802154 loopback:  Eliminate dependency on CONFIG_NET_LOOPBACK
	  (2017-04-02).
	* sim:  Add a configuration for testing 6LoWPAN (2017-04-03).
	* wireless/ieee802154:  Add initialization logic for loopback driver;
	  configs/sim: Add configuration for testing 6LoWPAN; net/sixlowpan:
	  Fix for compilation with debug output enabled (2017-04-03).
	* 6LoWPAN:  Updates/fixes from initial testing with the IEEE802.15.4
	  loopback driver (2017-04-03).
	* STM32:  Add I2C3 SDA pin mapping for STM32F411.  From no1wudi
	  (2017-04-04).
	* sensors: lis2dh:  Fix hardfault when reading from unconfigured
	  sensor.  From Juha Niskanen (2017-04-04).
	* STM32: stm32_flash:  Add EEPROM writing for STM32L15XX.  From Juha
	  Niskanen (2017-04-04).
	* 6LoWPAN:  Add option to dump buffers (2017-04-04).
	* STM32: stm32l15xx_rcc:  Add support for using MSI as system clock.
	  From Juha Niskanen (2017-04-05).
	* STM32:  stm32l15xxx_rcc: configure medium performance voltage range
	  and zero wait-state when allowed by SYSCLK setting.  Zero wait-state
	  for flash can be configured when:  (1) Range 1 and SYSCLK <= 16 Mhz,
	  (2) Range 2 and SYSCLK <= 8 Mhz, or (3) Range 3 and SYSCLK <= 4.2
	  Mhz.  Medium performance voltage range (1.5V) can be configured when
	  SYSCLK is up to 16 Mhz and PLLVCO up to 48 Mhz.  From Juha Niskanen
	  (2017-04-05).
	* wireless/ieee802154:  Initial MAC char driver write functionality.
	  From Anthony Merlino (2017-04-05).
	* photon:  wlan support.  From Simon Piriou (2017-04-03).
	* Document set [{+|-}{e|x|xe|ex}] [<name> <value>].  From David Sidrane
	  (2017-04-05).
	* STM32:  Fix SYSCFG_CFGR1_I2C_PBXFMP_SHIFT value.  From Alan Carvalho
	  de Assis (2017-04-06).
	* STM32F7:  Serial:  Add interface to get uart_dev_t by USART number,
	  stm32_serial_get_uart.  From Jussi Kivilinna (2017-04-06).
	* STM32F7:  Default CONFIG_STM32F7_DMACAPABLE to 'n'.  STM32F7 does not
	  have CCM RAM but DTCM, so this option does not need to enabled.  DTCM
	  RAM is DMA-able through CPU AHBS bus.  From Jussi Kivilinna
	  (2017-04-06).
	* STM32F7:  Fix UART7 and UART8 IFLOWCONTROL options.  From Jussi
	  Kivilinna (2017-04-06).
	* STM32F7:  Add warning for RXDMA + IFLOWCONTROL combination.
	  Combination of RXDMA + IFLOWCONTROL does not work as one might
	  expect.  Since RXDMA uses circular DMA-buffer, DMA will always keep
	  reading new data from USART peripheral even if DMA buffer underruns.
	  Thus this combination only does following: RTS is asserted on USART
	  setup and deasserted on shutdown and does not perform actual RTS
	  flow-control.  Data loss can be demonstrated by doing long up_mdelay
	  inside irq critical section and feeding data to RXDMA+IFLOWCONTROL
	  UART.  From Jussi Kivilinna (2017-04-06).
	* sim/sixlowpan:  Now supports apps/examples/udpblaster too (2017-04-06).
	* SAMV7: Watchdog:  Fix Forbidden Window Value.  According the Datasheet
	  the WDD Value is the lower bound of a so called Forbidden Window and
	  to disable this we have to set the WDD Value greater than or equal to
	  the WDV Value.  This seems to be a bug in the datasheet. It looks
	  like we have to set it to a greater value than the WDV to really
	  disable this Thing.  When triggering the Watchdog faster than the
	  (very slow) clock source of the Watchdog fires, this Forbidden Window
	  Feature resets the System if WDD equals to WDV.  This Changeset
	  disables the Forbidden Window by setting the WDD Value to the Maximum
	  (0xfff) Value possible.  From Frank Benkert (2017-04-06).
	* RTC:  Add interface for check if RTC time has been set.  New interface
	  allows checking if RTC time has been set.  This allows to application
	  to detect if RTC has valid time (after reset) or should application
	  attempt to get real time by other means (for example, by launching
	  ntpclient or GPS).  From Jussi Kivilinna (2017-04-06).
	* 6LoWPAN:  Add network IOCTL support to set the node address
	  (2017-04-06).
	* EFM32 I2C: Fix timeout calculation.  From Masayuki Ishikawa
	  (2017-04-06).
	* Disable serial console on stm32f103-minimum usbnsh example project
	  config. Devices enumerate after this change.  From Bob Ryan
	  (2017-04-07).
	* pthreads: Adding rwlock implementation.  Adding an implementation for
	  read/write locks into the pthread library.  These locks are writer
	  priority, such that if any writers come in they are given priority
	  for writing.  From Mark Schulte (2017-04-07).
	* pthread rwlock bugfixes.  From Mark Schulte (2017-04-07).
	* 6LoWPAN:  Add calculation of TCP header size.  It is not a constant
	  (2017-04-07).
	* Restore TCP_HDRLEN to MSS calculation.  Also add to UDP MSS
	  calculation where it never appearred.  Add some missing MSS and
	  RDVWNDO definitions for 6loWOPAN (2017-04-08).
	* pthread.h:  Remove duplicate, possible erroneous definition of
	  PTHREAD_MUTEX_INITIALIZER that crept in with some recent changes
	  (2017-04-08).
	* pthread.h: Fix rwlock initializer.  From Mark Schulte (2017-04-08).
	* Add configuration/build support for an IEEE802.15.4 network device
	  (2017-04-08).
	* Fix some old-style interrupt handling logic in drivers/net/skeleton.c
	  (2017-04-08).
	* wireless/ieee802154:  Add a implementation of the IEEE802.15.4
	  network driver.  This is very incomplete on the initial commit
	  (2017-04-08).
	* Buttons:  Change return value of board_buttons() and the type of
	  btn_buttonset_t to uint32_t so that more than 8 buttons can be
	  supported (2017-04-09).
	* Add support for NuttX controlled LEDS and for board_initialize.
	  Separate initialization logic to stm32_bringup.c so that in
	  initialization can occur either through board_initialize() or through
	  board_app_initialize().  Same as with most other newer board
	  configurations (2017-04-09).
	* net procfs: Some long lines were being generated that cause
	  buffer-related problems and corrupted output (2017-04-09).
	* stm32 COMP:  Logic in stm32_comp.h must be configured on
	  CONFIG_STM32_COMP or otherwise it causes an error via #error on every
	  platform without COMP support (2017-04-09).
	* Photon:  Add logic to automatically mount the procfs file system on
	  startup.  Fix some LED-related configuration conflicts (2017-04-09).
	* Buttons:  Correct some comments left after last button-related
	  change:  32- vs 8-bit bit set (2017-04-09).
	* pthread:  Use cancel cleanup handlers in rwlock.  From Juha Niskanen
	  (2017-04-10).
	* STM32F7: serial: disallow broken configuration combination of
	  CONFIG_STM32F7_FLOWCONTROL_BROKEN=y and
	  CONFIG_SERIAL_IFLOWCONTROL_WATERMARKS not set.  From Jussi Kivilinna
	  (2017-04-11).
	* STM32F7: serial: do not stop processing input in SW flow-control
	  mode.  From Jussi Kivilinna (2017-04-11).
	* STM32XX: Fix Pending Register definition.  From Alan Carvalho de
	  Assis (2017-04-11).
	* Add logic to disable cancellation points within the OS.  This is
	  useful when an internal OS function that is NOT a cancellation point
	  calls an OS function which is a cancellation point.  In that case,
	  irrecoverable states may occur if the cancellation is within the OS.
	  From Juha Niskanen (2017-04-11).
	* Fix LLVM libc++ undefined reference to __cxa_guard_*.  From Alan
	  Carvalho de Assis (2017-04-11).
	* libc/netdb: in dns_query_callback, ret != -EADDRNOTAVAIL condition
	  consumes error returns including EAGAIN in this case, dns query
	  retransmission doesn't work.  From Ritajina (2017-04-12).
	* STM32L4 DMA: Correct bad channel definition.  From Sebastien Lorquet
	  (2017-04-12).
	* TUN driver: Implement TAP (OSI layer 2) mode. Enable by setting the
	  IFF_TAP flag instead of the IFF_TUN flag in ifr_flags.  From Thomas
	  Keh (2017-04-13).
	* Adds USB host support to stm32f411-disco board.  From Brian Webb
	  (2017-04-13).
	* ieee802.15.4 radio:  Add data structure definitions for Radio IOCTLs
	  (2017-04-13).
	* ieee802.15.4 MAC:  Add data structure definitions for MAC IOCTLs
	  (2017-04-13).
	* ieee802154 radio:  Implement IOCTL decode and dispatch in all radio
	   drivers (2017-04-13).
	* drivers/net/skeleton.c:  Add support for IOCTL handling (2017-04-13).
	* ieee802.15.4 netdev:  Add IOCTL support (2017-04-13).
	* ieee802.15.4 radio:  Remove interface methods that duplicate IOCTL
	  commands (2017-04-13).
	* ieee802.15.4:  de-couple MAC driver interface.  Now works more like
	  other drivers (2017-04-13).
	* sched:  Fix tg_flags check with GROUP_FLAG_NOCLDWAIT.  From Masayuki
	  Ishikawa (2017-04-14).
	* Add basic support for STM32F0.  From Alan Carvalho de Assis
	  (2017-04-14).
	* Add stm32f0discovery board support.  From Alan Carvalho de Assis
	  (2017-04-14).
	* arch/arm/Kconfig:  Add option for STM32F0 (2017-04-14).
	* IEEE802.15.4:  There is only one instance of the IEEE802.15.4 MAC
	  lower level.  There is no need for the interface to be indirect via a
	  vtable.  In this case, standard global functions should be used
	  (2017-04-14).
	* ieee802.15.4:  New global functions exported by the lower MAC layer
	  should be private to the MAC module.  Function prototypes moved from
	  include/nuttx/wireless/ieee802154/ieee802154_mac.h to
	  wireless/ieee802154/mac802154.h (2017-04-14).
	* radio802154_device.c now accesses the PHY layer via the IOCTL helper
	  functions (2017-04-14).
	* photon:  Add sdpcm + thread support for wlan.  From Simon Piriou
	  (2017-04-13).
	* Not a clean fix, but at least makes DHCP working with
	  CONFIG_NETDEV_MULTINIC.  From Andreas Bihlmaier (2017-04-15).
	* networking:  IPv4 change of last PR should also be applied to
	  corresponding IPv6 logic (2017-04-15).
	* 6LoWPAN:  Add some checks for the case where there are multiple
	  network devices and multiple link layer protocols (2017-04-15).
	* net/:  Add IOCTL support for forwarding IEEE802.15.4 MAC and PHY
	  IOCTLs (2017-04-15).
	* Argument of network device IOCTL should be unsigned long, just as
	  will all other IOCTL methods (2017-04-15).
	* wireless/ieee802154:  Adds ability to receive notifications from MAC
	  char driver.  From Anthony Merlino (2017-04-05).
	* wireless/ieee802154/mrf24j40:  Added bind method.  From Anthony
	  Merlino (2017-04-15).
	* wireless/ieee802154:  Starts adding MAC request data functionality.
	  From Anthony Merlino (2017-04-15).
	* wireless/ieee802154:  Starts defining interface between PHY layer and
	  next highest layer.  From Anthony Merlino (2017-04-15).
	* wireless/ieee802154:  Skeleton code for request associate.  From
	  Anthony Merlino (2017-04-15).
	* wireless/ieee802154:  Bind MAC phyif to radio.  From Anthony Merlino
	  (2017-04-15).
	* STM32:  Provide TIM5 definition for STM32F429.  From Matias v01d
	  (2017-04-15).
	* photon:  Add sdpcm tx basic support.  From Simon Piriou (2017-04-16).
	* photon:  Request firmware version and MAC address.  From Simon Piriou
	  (2017-04-16).
	* 6LoWPAN network driver:  Still only a skeleton but has some added
	  thought experimentation (2017-04-16).
	* 6LoWPAN:  Correct ordering of headers.  fragmentation header was
	  coming out before FCF (2017-04-16).
	* wireless/ieee802154:  Continues development on transmit structure.
	  From Anthony Merlino (2017-04-17).
	* STM32F0:  Enable the clock for all GPIO ports.  From Alan Carvalho de
	  Assis (2017-04-17).
	* STM32F0:  Fix HSI clock definition.  From Alan Carvalho de Assis
	  (2017-04-17).
	* STM32F0:  Fix System Clock value to 48MHz and remove MCLK
	  definition.  From Alan Carvalho de Assis (2017-04-17).
	* Update coding standard document to discuss un-named structure fields
	  (2017-04-17).
	* STM32F0:  Add basic support for STM32F07x family (2017-04-17).
	* STM32F0:  Move enabling of GPIO peripherals form UART setup to
	  clockconfig.  This is not a UART function.  It is needed by all
	  peripherals (2017-04-17).
	* STM32F0:  Add logic to enable other USARTs.  No UART4/5.  Rather
	  USART4/5 (2017-04-17).
	* STM32F7:  Warn if no DMA2 configured when using ADC with DMA.  Also
	  correct ADC channel numbers that DMA callback passes to upper half
	  driver.  From Juha Niskanen (2017-04-18).
	* STM32F7: stm32_adc:  Do not override ADCPRE_DIV when measuring
	  internal voltage.  From Juha Niskanen (2017-04-18).
	* Move CONFIG_ADC_NO_START_CONV from drivers/adc/Kconfig to
	  arch/arm/src/stm32[f7]/Kconfig as STM32[F7]_ADC_NO_START_CONV.
	  Refresh all configurations with any reference to
	  CONFIG_ADC_NO_START_CONV (2017-04-18).
	* STM32F0:  The STM32F2 does not have use alternate function groupings
	  as does the F1.  Rather, it is like other members of the STM32 family
	  with An alternate setting AF0-AF7 for each pin (2017-04-18).
	* Nucleo-F072RB: Add board configuration (2017-04-18).
	* wireless/ieee802154: Lots of small fixes to eliminate build issues.
	  Generally cleans things up and fixes lots of small issues preventing a
	  successful build.  Does not completely build, but there are
	  significantly less errors.  From Anthony Merlino (2017-04-18).
	* Coding standard:  Defining structures within the scope of another
	  structure is discouraged (2017-04-18).
	* Nucleo-F072RB:  Enable board_app_inititalize, procfs, and built-in
	  functions (2017-04-19).
	* wireless/ieee802154:  Simplifies MAC callback interface.  Adds
	  missing data type definitions.  From Anthony Merlino (2017-04-19).
	* wireless/ieee802154:  Renames mac802154_devwrapper_s to
	  mac802154_chardevice_s.  From Anthony Merlino (2017-04-19).
	* wireless/ieee802154:  Changes radio interface to match MAC callback
	  design.  From Anthony Merlino (2017-04-19).
	* 6LoWPAN:  Fix a missing source address in header.  Correct
	  calculation of payload size (2017-04-19).
	* SAMV7 EMAC:  Add conditional logic to account the fact that the
	  SAMV71 has 6 rather than 3 queues after version 1.  From Ian McAfee
	  (2017-04-19).
	* wireless/ieee802154:  Starts structuring transmission completion
	  handling.  From Anthony Merlino (2017-04-19).
	* 6LoWPAN:  Add an IOCTL to set the IEEE802.15.4 PAN ID (2017-04-19).
	* STM32 L1: stm32l15xx_rcc: Allow board to configure HSE clock in
	  bypass-mode.  Allows using MCO output from ST-link chip (on Nucleo
	  and Discovery boards) as HSE input.  From Juha Niskanen (2017-04-20).
	* Add support for STM32L152CC, STM32L152RC and STM32L152VC.  Update
	  some bits and comments for other STM32L1 parts in chip.h.  From Juha
	  Niskanen (2017-04-20).
	* UART 16550:  Missing left parenthesis in function prototype.  This is
	  Bitbucket Issue #41 (2017-04-20).
	* procfs:  Fix wrong member IDs are displayed when 'cat
	  /proc/<pid>/group/status'.  From Nobutaka Toyoshima (2017-04-28).
	* STM32F0:  Add support for HSI48 (2017-04-20).
	* STM32F0:  Add an untested port of the F1 USB device to the STM32F0
	  (2017-04-20).
	* Move include/nuttx/net/iob.h to include/drivers/iob.h; rename
	  CONFIG_NET_IOB to CONFIG_DRIVERS_IOB (2017-04-20).
	* Move net/iob to drivers/iob so that the I/O buffering feature can be
	  available to other drivers when networking is disabled (2017-04-20).
	* VFS poll():  Add some error handling logic (2017-04-20).
	* Add support for the STM32F09X family.  From Juha Niskanen (2017-04-21).
	* clock:  Add clock_resynchronize and use subseconds RTC.  Add
	  clock_resynchronize for better synchronization of CLOCK_REALTIME and
	  CLOCK_MONOTONIC to match RTC after resume from low-power state.  Add
	  up_rtc_getdatetime_with_subseconds under
	  CONFIG_ARCH_HAVE_RTC_SUBSECONDS to allow initializing (and
	  resynchronizing) system clock with subseconds accuracy RTC.  From
	  Jussi Kivilinna (2017-04-21).
	* clock:  Add new type ssystime_t for relative 64-bit ticks, change
	  ticks<->time conversion functions to use ssystime_t.  From Jussi
	  Kivilinna (2017-04-21).
	* clock:  add testing for 32-bit overflow of 64-bit system timer.  From
	  Jussi Kivilinna (2017-04-21).
	* wireless/ieee802154:  Simplifies TX completion interface.  Documents
	  and cleans up some functions.  From Anthony Merlino (2017-04-21).
	* Remove the 6LoWPAN PANID IOCTLs they are redundant (2017-04-21).
	* 6LoWPAN:  Remove the PAN ID from the 6LoWPAN data structure.  This is
	  owned by the radio driver.  Rather, use an IOCTL to obtain the PAN ID
	  from the downstream radio driver (2017-04-21).
	* photon:  Add basic wlan scan function.  From Simon Piriou (2017-04-22).
	* 6LoWPAN:  Separate MAC-related definitions from sixlowpan.h.  Put in
	  ieee802154.h (2017-04-22).
	* net/:  network drver now retains Ethernet MAC address in a union so
	  that other link layer addresses may be used in a MULTILINK
	  environment (2017-04-22).
	* 6LoWPAN: Add IEEE802.15.4 Rime address to union of link layer
	  addresses in the network driver (2017-04-22).
	* SAM3/4:  Fixed configurations for TWI master.  Obviously an
	  incomplete port from SAMA5 (2017-04-23).
	* SAM3/4:  Remove inappropriate semicolon.  From kc_dtm (2017-04-23).
	* configs/photon:  Add DOWNLOAD function to upload firmware through
	  DFU.  From Simon Piriou (2017-04-23).
	* drivers/ieee80211/:  Change all occurrences of _info, _warn, and _err
	  to wlinfo, wlwarn, and wlerr (2017-04-23).
	* USBMSC:  Fix a wrong lun number issue.  From Masayuki Ishikawa
	  (2017-04-24).
	* sched:  Fix CHILD_FLAG_EXITED in include/nuttx/sched.h.  From
	  Masayuki Ishikawa (2017-04-24).
	* wireless/ieee80211:  Add skeleton for a broadcom network driver
	  (2017-04-24).
	* wiress/ieee80211: Broadcom network driver needs to register as an
	  ieee802.11 driver, not an Ethernet driver (2017-04-24).
	* wireless/ieee80211:  Add broadcom network device registration logic
	  (2017-04-24).
	* drivers/wireless/bcmf:  Register network driver + update defconfig
	  file.  From Simon Piriou (2017-04-24).
	* procfs:  Fix incorrect uptime with CONFIG_SYSTEM_TIME64.  From
	  Masayuki Ishikawa (2017-04-25).
	* configs/photon/wlan:  Minor config changes to get a clean build
	  (2017-04-25).
	* STM32L4:  Add support for the STM32L496XX family.  From Juha Niskanen
	  (2017-04-25).
	* configs/photon:  Rename ld.script to photon_jtag.ld for symmetry
	  (2017-04-25).
	* configs/photon/src/stm32_wlan.c:  Remove unused, inappropriate
	  network driver registration (2017-04-25).
	* netdev_register:  If there is only one ieee80211 and both
	  CONFIG_ETHERNET and CONFIG_DRIVERS_IEEE8011, then use the wlan0
	  naming, not the eth0 naming (2017-04-25).
	* configs/nucle-f072rb/nsh:  Correct amount of available SRAM in
	  defconfig (2017-04-26).
	* CONFIG_DEBUG_HARDFAULT should be available for Cortex-M0 too
	  (2017-04-26).
	* drivers/wireless/bcmf:  Enable DMA for SDIO transfers.  From Simon
	  Piriou (2017-04-26).
	* configs:  Remove all setenv.bat files.  Remove all references to
	  setenv.sh and setenv.bat from all config README files (2017-04-26).
	* drivers/syslog:  Use monotonic clock for timestamp when available.
	  From Jussi Kivilinna (2017-04-26).
	* Enable wireless IOCTL commands in photon/wlan configuration
	  (2017-04-26).
	* Network IOCTLs:  Correct a compilation error when wireless IOCTLs are
	  enabled (2017-04-26).
	* binfmt/elf:  Fix offset value when calling elf_read() in
	  elf_symname().  From Masayuki Ishikawa (2017-04-26).
	* STM32, STM32F7, STM32L4: Remove incorrect comment about STM32L1
	  LSE/RTC/LCD.  From Juha Niskanen (2017-04-27).
	* STM32L4:  Add some defines for the new peripherals in STM32L496
	  parts.  From Juha Niskanen (2017-04-27).
	* STM32F0:  Fix some missing settings in the clock configuration logic
	  (2017-04-27).
	* IOCTLS.  Separate wireless character driver IOCTL commands from
	  wireless network driver IOCTL commands.  Move from wireless.h to
	  ioctl.h (2017-04-27).
	* IEEE 802.15.4:  Move MAC character driver IOCTL commands from
	  ieee802154_mac.h to ieee802154_ioctl.h (2017-04-27).
	* Wireless IOCTLs: Correct use of _WLIOC where _WLCIOC is required
	  (2017-04-27).
	* net/socket:  Fix cloning of local and raw sockets.  From Jussi
	  Kivilinna (2017-04-28).
	* STM32L4: stm32l4_i2c:  Add I2C4 code.  From Juha Niskanen (2017-04-28).
	* STM32L4:  I2C was not using current interrupt handling parameter
	  passing logic (2017-04-28).
	* vfs/poll: round timeout up to next full tick.  Calling poll() with
	  timeout less than half tick (thus MSEC2TICK(timeout) => 0) caused
	  returning error with EAGAIN. Instead of rounding timeout down, value
	  should be rounded up. Open Group spec for poll says:
	  "Implementations may place limitations on the granularity of timeout
	  intervals. If the requested timeout interval requires a finer
	  granularity than the implementation supports, the actual timeout
	  interval will be rounded up to the next supported value."  From Jussi
	  Kivilinna (2017-04-28).
	* In last change to poll(), converted timeout to unsigned to eliminate
	  the possibility of overflow of signed overflow (2017-04-28).
	* drivers/wireless/bcmf:  Add escan ioctls support + cleanup.  From
	  Simon Piriou (2017-04-28).
	* Add all network IOCTLs to include/sys/ioctl.h (2017-04-28).
	* Add all ieee802.15.4 IOCTLs to include/sys/ioctl.h (2017-04-28).
	* 6LoWPAN:  Can't reuse same header on each fragment.  DSN needs to
	  increment (2017-04-29).
	* SPI:  Add an instance argument to the SPIDEV definitions (2017-04-29).
	* STM32F0:  Add some protection.  There is only one interrupt for
	  USART3-8.  Current interrupt handling logic will support only one
	  interrupt in that range (2017-04-29).
	* STM32F0 I2C:  Initial cut at driver.  Still a work in progress.  From
	  Alan Carvalho de Assis (2017-04-29).
	* STM32F33:  Add OPAMP support.  From Mateusz Szafoni (2017-04-30).
	* drivers/analog:  Add basic OPAMP driver.  From Mateusz Szafoni
	  (2017-04-30).
	* Nucleo-F334R8:  Add OPAMP support.  From Mateusz Szafoni (2017-04-30).
	* Nucleo-F072RB:  Add support for the I2C driver used by I2C tools
	  (2017-04-20).
	* drivers/i2c:  Fix compile issus if CONFIG_DISABLE_PSEUDOFS_OPERATIONS
	  is enabled (2017-04-30).
	* STM32F0 I2C:  Update driver to use the standard interrupt parameter
	  passing logic (2017-04-30).
	* STM32F0 I2C:  Pin definitions should specify open drain (and probably
	  50Mhz) (2017-04-30).
	* EFM32, STM32, and STM32 F7 I2C:  Update to use the standard parameter
	  passing to interrupt handlers (2017-04-30).
	* drivers/wireless/bcmf:  Add netdev support for Broadcom FullMAC
	  driver.  From Simon Piriou (2017-04-30).
	* Tiva I2C:  Update to use the standard parameter passing to interrupt
	  handlers (2017-04-30).
	* ieee802.11:  Bring some BSD licensed header files in from FreeBSD
	  (2017-04-30).
	* Clicker2-STM32:  Add protected build knsh configuration (2017-05-01).
	* STM32F0:  Fix I2C frequency table.  From Alan Carvalho de Assis
	  (2017-05-01).
	* STM32F0:  I2C frequency quantization.  Add logic to get closer if an
	  oddball frequency is used (2017-05-01).
	* pthread: Fix compilation error on pthread_cond_wait when
	  CONFIG_CANCELLATION_POINTS and CONFIG_PTHREAD_MUTEX_UNSAFE are
	  enabled.  From  EunBong Song (2017-05-02).
	* binfmt/elf:  Fix offset value when calling elf_read() in
	  elf_sectname().  From Masayuki Ishikawa (2017-05-02).
	* configs:  Add nucleo-l496zg board files.  From Juha Niskanen
	  (2017-05-02).
	* configs:  Add nucleo-f091rc board files.  From Juha Niskanen
	  (2017-05-02).
	* STM32L4:  Don't think these chips have DPFPU, DTCM or ITCM.  From
	  Juha Niskanen (2017-05-02).
	* STM32L4:  Add GPIO_PORTI definition.  From Juha Niskanen (2017-05-02).
	* STM32L4:  Delete more references to DFPU, ITCM, and DTCM (2017-05-02).
	* wireless/ieee802154:  Changes transmit data path to use IOBs and
	  exposes function for getting size of MAC header.  From Anthony
	  Merlino (2017-05-02).
	* Extend wireless.h with definitions needed by wext.  From Simon Piriou
	  (2017-05-02).
	* drivers/wireless/bcmf: implement basic wext interface for
	  authentication.  From Simon Piriou (2017-05-02).
	* First attempt at a nucleo-l432kc board.  From Sebastien Lorquet
	  (2017-05-02).
	* STM32F7:  Flash: macro naming errors, there is no FLASH_CONFIG_F for
	  F7.  From Juha Niskanen (2017-05-02).
	* STM32L4: stm32l4x6xx_pinmap:  Update I2C4 and DCMI pins.  From Juha
	  Niskanen (2017-05-02).
	* 6LoWPAN: Add basic call path to interface with the MAC layer through
	  the MAC network driver.  Logic has not yet been implemented.  This is
	  just a structural change in preparation for additional changes
	  (2017-05-02).
	* wireless/ieee802154:  Sets up default PIB attributes.  From Anthony
	  Merlino (2017-05-02).
	* wireless/ieee802154:  Finishes some IOCTL logic for MAC layer.  From
	  Anthony Merlino (2017-05-02).
	* 6LoWPAN:  Changes to use new MAC interfaces.  Incomplete and needs
	  some clean-up of dangling, unused definitions (2017-05-03).
	* wireless/ieee802154: Starts work on setting PIB attributes.  From
	  Anthony Merlino (2017-05-03).
	* 6LoWPAN:  Fixes hang in loopback test (2017-05-03).
	* drivers/wireless/bcmf:  Fix frame not freed when dropped + cleanup.
	  From Simon Piriou (2017-05-03).
	* STM32L4: stm32l4_i2c:  Change wrong macro to CONFIG_I2C_POLLED.  From
	  Juha Niskanen (2017-05-04).
	* STM32L4: modularize Kconfig to support different product
	  lines/families.  This is modeled after STM32F7. Idea is to declare
	  each chip in Kconfig but allow for flash size override. Commit adds
	  many STM32L4_HAVE_XXX feature test macros.  From Juha Niskanen
	  (2017-05-02).
	* STM32L4:  Changes needed for STM32L452 and Nucleo-L452RE board.  GPIO
	  and UART seem similar across STMicro product matrix, so renamed files
	  accordingly. RCC is cloned just in case, while conflicting
	  differences there seem to be very minor.  From Juha Niskanen
	  (2017-05-02).
	* STM32L4:  Flash: update override config macros and add
	  FLASH_CONFIG_B.  From Juha Niskanen (2017-05-02).
	* configs:  Add nucleo-l452re board files.  From Juha Niskanen
	  (2017-05-04).
	* fixedmath:  Add square root and b32_t conversion operators.  From
	  Jussi Kivilinna (2017-05-04).
	* Fix STM32F7 I2C interrupt handler.  From Jussi Kivilinna (2017-05-04).
	* STM32F7 serial:  Allow configuring Rx DMA buffer size.  From Jussi
	  Kivilinna (2017-05-04).
	* 6LoWPAN: Replace Rime address naming with more consistent
	  short/exended address terminology (2017-05-04).
	* 6LoWPAN:  Remove all ieee802.15.4 MAC knowledge from 6LoWPAN.  Now
	  relies on wires/ieee802154 for all MAC-related operations (2017-05-04).
	* 6LoWPAN:  Local address length is fixed by the configuration.  The
	  remote address be with short or extended (2017-05-04).
	* STM32L4:  Separate SYSCFG into product line specific files for
	  clarity.  From Juha Niskanen (2017-05-05).
	* STM32L4:  firewall for stm32l4x3xx.  Not tested for any product
	  family, but now it at least compiles.  L496 devices can have one bit
	  wider Volatile Data Segment.  From Juha Niskanen (2017-05-05).
	* STM32L4:  Add more chips to Kconfig.  This also removes
	  DPFPU/DTCM/ITCM features again, fixing a recent git history hickup.
	  From Juha Niskanen (2017-05-05).
	* configs/nucleo-l496zg:  Kconfig was copied from nucleo-144.  Removed
	  as most options have not been tested.  From Juha Niskanen (2017-05-05).
	* nucleo-144:  Default for choice in Kconfig was not one of the
	  possible choices (2017-05-05).
	* Kinetis:  Add TPM to K66 chip.  From David Sidrane (2017-05-05).
	* Kinetis:  Fixed CLKSRC Bit Names.  From David Sidrane (2017-05-05).
	* Kinetis:  Add OSC_DIV to the kinetis_osc header.  From David Sidrane
	  (2017-05-05).
	* Kinetis:  Use optional BOARD_OSC_CR and BOARD_OSC_DIV in clock
	  configuration.  From David Sidrane (2017-05-05).
	* Kinetis:  Added HW flow control and termios.  From David Sidrane
	  (2017-05-05).
	* wireless/ieee802154:  Changes rxenable at radio layer.  From Anthony
	  Merlino (2017-05-03).
	* wireless/ieee802154:  Finishes promiscuous mode IOCTL.  From Anthony
	  Merlino (2017-05-03).
	* wireless/ieee802154:  Removes radio IOCTL.  Starts bringing radio and
	  MAC closer with well-defined interface.  From Anthony Merlino
	  (2017-05-05).
	* STM32L4:  Add support for many new MCUs from STM32L4X3XX product line
	  and Nucleo-L452 board.  From Juha Niskanen (2017-05-05).
	* 6LoWPAN:  Use information in struct ieee802154_data_ind_s when
	  reassembling a packet (2017-05-05).
	* ieee 802.15.4: Add a pool-based memory allocator for RX frame
	  meta-data (2017-05-05).
	* kinetis k66, k64, k60, k40, k20: Pin mux configure all I2C signals as
	  Open Drain.  The output structure of the GPIO for I2C needs to be
	  open drain.  When left at the default, one can observe on a scope the
	  slave contending with the push-pull during the ACK.  From David
	  Sidrane (2017-05-05).
	* wireless/ieee802154: Removes msdu_length from meta-data since it is
	  intrinsically in the IOB.  From Anthony Merlino (2017-05-06).
	* wireless/ieee802154: Reworks data_ind allocation to include IOB
	  allocation/deallocation. Hides private data.  From Anthony Merlino
	  (2017-05-05).
	* wireless/ieee802154: Completes Rx data flow through MAC layer to
	  callback.  From Anthony Merlino (2017-05-06).
	* Kinetis:  Add ARCH_HAVE_I2CRESET.  From David Sidrane (2017-05-06).
	* Reworks data_ind allocation to include IOB allocation/deallocation.
	  Hides private data.  From Anthony Merlino (2017-05-06).
	* STM32:  Serial Allow configuring Rx DMA buffer size.  From David
	  Sidrane (2017-05-06).
	* 6LoWPAN: Minor cleanup and re-verification of all compression modes
	  after so many recent changes (2017-05-06).
	* Update the C coding standard document (2017-05-06).
	* IEEE 802.15.4 network driver.  Remove support for multicast address
	  filtering; doesn't work that way on an IEEE 802.15.4 network
	  (2017-05-08).
	* STM32:  Serial DMA buffer round off not up.  From David Sidrane
	  (2017-05-08).
	* STM32 TIM:  Add method to get timer width.  Freerun timer: Use timer
	  width to get the correct clock rollover point (2017-05-08).
	* wireless/ieee802154: Finishes MAC processing of received data frame.
	  From Anthony Merlino (2017-05-08).
	* wireless/ieee802154: Finishes MAC char driver read functionality.
	  From Anthony Merlino (2017-05-08).
	* wireless/ieee802154: MRF24J40: Finishes receive functionality,
	  supports promicuous mode, and rxonidle attributes.  From Anthony
	  Merlino (2017-05-08).
	* wireless/ieee802154: Completes basic receive functionality.  From
	  Anthony Merlino (2017-05-08).
	* Final fixes to get the nucleo-l432kc config build.  Execution not
	  tested yet.  From Sebastien Lorquet (2017-05-09).
	* Adapt stm32l43x pin definitions.  From Sebastien Lorquet (2017-05-09).
	* More unbuilt stm32 -> stm32l4 changes.  From Sebastien Lorquet
	  (2017-05-09).
	* Restore settings for UARTs 4 and 5.  From Sebastien Lorquet
	  (2017-05-09).
	* IOBs:  Move from driver/iob to a better location in mm/iob
	  (2017-05-09).
	* STM32L4:  Add dbgmcu header files.  From Juha Niskanen (2017-05-09).
	* wireless/ieee802154: Fixes missing handle of read/write being able to
	  be interrupted.  From Anthony Merlino (2017-05-09).
	* wireless/ieee802154:  Starts implementing START.request primitive.
	  From Anthony Merlino (2017-05-09).
	* drivers/serial: I discovered a problem in the file
	  drivers/serial/serial.c concerning the function uart_close(…). In the
	  case that a serial device is opened with the flag O_NONBLOCK the
	  function uart_close(…) blocks until all data in the buffer is
	  transmitted. The function close(…) called on an handle opened with
	  O_NONBLOCK should not block. The problem occurred with a CDC/ACM
	  device.  From Stefan Kolb (2017-05-10).
	* mtd/config:  erase block between block read and write.  From Juha
	  Niskanen (2017-05-10).
	* Moved LIS3DSH from the I2C-dependent block to the SPI-block to make
	  Make.defs consistent with the driver (SPI only) and
	  drivers/sensors/Kconfig.  From Floxx (2017-05-10).
	* syslog:  Add option to buffer SYSLOG output to avoid interleaving
	  (2017-05-10).
	* syslog buffering:  Use IOBs to buffer data, not an on-stack buffer
	  (2017-05-10).
	* STM32L4:  Add internal flash write support.  From Juha Niskanen
	  (2017-05-11).
	* When syslog message has addition characters after last new-line. With
	  buffering those now get lost as vsyslog does not flush output after
	  lib_sprintf. Additional trailing characters could be ANSI escape
	  sequence to reset state that message setups. For example, macro here
	  uses colors and resets state after actual message (including '\n'):
	  With flushing added to vsyslog, then there is problem that next
	  syslog line might come from other task before reset sequence, causing
	  wrong line getting color. This could be avoided by not flushing on
	  '\n' but only if IOB is full and/or at end of vsyslog.  Would this
	  make sense?.  From Jussi Kivilinna (2017-05-11).
	* Syslog:  Need inclusion of errno.h for fix building with
	  CONFIG_SYSLOG_TIMESTMAP=y (2017-05-11).
	* mtd:  Build RAMTRON and AT45DB drivers only if selected.  From Juha
	  Niskanen (2017-05-11).
	* mtd/config:  Fix byte read interface test.  From Juha Niskanen
	  (2017-05-11).
	* mtd:  Fix some unallocated and NULL pointer issues.  rwb->wrflush and
	  rwb->wrmaxblocks in rwbuffer could get unallocated values from
	  ftl_initialize() in some configurations.  Also fixes related assert:

	    up_assert: Assertion failed at file:rwbuffer.c line: 643

	  that can happen with the following configuration:

	    CONFIG_FTL_WRITEBUFFER=y
	    CONFIG_DRVR_WRITEBUFFER=y
	    # CONFIG_FS_WRITABLE is not set

	  These problems are caused by CONFIG variable differences between the
	  buffer layers. TODO: This is not a perfect solution. readahead
	  support has similar issues.  From Juha Niskanen (2017-05-11).
	* STM32L4: port stm32l4_serial_get_uart function from STM32F7.  From
	  Juha Niskanen (2017-05-12).
	* syslog:  Avoid flushing syslog_stream buffer, if possible, until
	  lib_vsprintf() completely parses the format.  This assures that the
	  flush will flush the entire output, even data that may potentially
	  follow the linefeed.  And, in that case, it cannot be interleaved
	  with other devug output.  Suggested by Jussi Kivilinna (2017-05-12).
	* syslog:  There is yet another place where the output can get split.
	  That is in syslog_dev_write():  It will break up the stream to insert
	  a CR before the LF.  This can that can be avoid be generating the
	  CR-LF sequence in the buffer and then detecting and ignoring valid
	  CR-LF sequences, rather than expecting syslog_dev_write() to insert
	  the CR in this case.  I don't like the idea that syslog_dev_write()
	  still scans the entire output buffer to expand CR-LF sequence.  This
	  seems really wasteful, especially in this case where we can be sure
	  that the is no CR or LF without a matching LF or CR.  Bu, I think,
	  the existing behavior in syslog_dev_write() must be retained because
	  it is needed in other contexts (2017-05-12).
	* Bitbucket Issue 47: Some of last syslog changes needed to be
	  condition on #ifdef CONFIG_SYSLOG_BUFFER in order to be built without
	  syslog buffering enabled (2017-05-12).
	* Move CAN subsystem to its own directory and put device drivers
	  there.  From Alan Carvalho de Assis (2017-05-12).
	* locale.h:  Add a bogus definition of locale_t.  From  (2017-05-12).
	* kinetis K66:  Fixed TMP2_CH1 definition.  From David Sidrane
	  (2017-05-12).
	* kinetis K66:  Define ALT1 to match ref manual.  From David Sidrane
	  (2017-05-12).
	* kinetis K66:  GPIO and pin mux cleanup.  From David Sidrane
	  (2017-05-13).
	* STM32F410:  Add support for STM32F410.  STM32F410 is a version of
	  STM32F4 with 32 KB of RAM and 62 or 128 KB of flash.  From Gwenhael
	  Goavec-Merou (2017-05-13).
	* Kconfig/deconfigs:  Add CONFIG_ARCH_TOOLCHAIN_GNU to indicate that
	  the toolchain is based on GNU gcc/as/ld.  This is in addition to the
	  CPU-specific versions of the same definition (2017-05-13).
	* Remove CONFIG_ARM_TOOLCHAIN_GNU; replace with
	  CONFIG_ARCH_TOOLCHAIN_GNU (2017-05-13).
	* Tiva I2C:  Correct an error in conditional compilation (2017-05-13).
	* Kconfig:  Rename CONFIG_ARM_TOOLCHAIN_IAR to
	  CONFIG_ARCH_TOOLCHAIN_IAR (2017-05-13).
	* Move prototype for up_cxxinitialize() from nuttx/include/nuttx/arch.h
	  to apps/include/platform/cxxinitialize.h (2017-05-13).
	* libc/wchar: Versions mbrlen and mbsrtowcs taken and adapted from
	  FreeBSD code (at https://github.com/freebsd/freebsd/).  From Matias
	  v01d (2017-05-13).
	* tcp:  wait for 3-Way Handshare before accept() returns.  From Simon
	  Piriou (2017-05-14).
	* configs/photon/wlan:  disable network logs and add nsh over telnet.
	  From Simon Piriou (2017-05-14).
	* TCP: Send RST if applicaiton 'unlistens()' before we complete the
	  connection sequence (2017-05-14).
	* drivers:  fix some bad NULL checks.  From Juha Niskanen (2017-05-15).
	* drivers:  rename newly introduced up_i2creset to I2C_RESET.  From
	  Juha Niskanen (2017-05-15).
	* TCP: An RST received during the 3-way handshake requires a little
	  more clean-up (2017-05-15).
	* STM32 CAN: I had the problem that the transmit FIFO size (= actual
	  elements in FIFO) was slowly increasing over time, and was full after
	  a few hours.  The reason was that the code hit the line
	  "canerr("ERROR: No available mailbox\n");" in stm32_cansend, so
	  can_xmit thinks it has sent the packet to the hardware, but actually
	  has not. Therefore the transmit interrupt never happens which would
	  call can_txdone, and so the size of the FIFO size does not decrease.
	  The reason why the code actually hit the mentioned line above, is
	  because stm32can_txready uses a different (incomplete) condition than
	  stm32can_send to determine if the mailbox can be used for sending,
	  and thus can_xmit forwards the packet to stm32can_send.
	  stm32can_txready considered mailboxes OK for sending if the mailbox
	  was empty, but did not consider that mailboxes may not yet be used if
	  the request completed bit is set - stm32can_txinterrupt has to
	  process these mailboxes first.  Note that I have also modified
	  stm32can_txinterrupt - I removed the if condition, because the CAN
	  controller retries to send the packet until it succeeds. Also if the
	  condition would not evaluate to true, can_txdone would not be called
	  and the FIFO size would not decrease also.  From Lederhilger Martin
	  (2017-05-16).
	* drivers/bch: BCH character driver bch_ioctl() always returns -ENOTTY
	  for DIOC_GETPRIV command.  It should returns OK if DIOC_GETPRIV
	  command succeeds.  From  EunBong Song (2017-05-16).
	* There can be a failure in IOB allocation to some asynchronous
	  behavior caused by the use of sem_post().  Consider this scenario:
	  (1) Task A holds an IOB.  There are no further IOBs.  The value of
	  semcount is zero. Task B calls iob_alloc().  Since there are not
	  IOBs, it calls sem_wait().  The value of semcount is now -1.  (2)
	  Task A frees the IOB.  iob_free() adds the IOB to the free list and
	  calls sem_post() this makes Task B ready to run and sets semcount to
	  zero NOT 1.  There is one IOB in the free list and semcount is zero.
	  When Task B wakes up it would increment the sem_count back to the
	  correct value.  (3) But an interrupt or another task runs occurs
	  before Task B executes.  The interrupt or other tak takes the IOB off
	  of the free list and decrements the semcount.  But since semcount is
	  then < 0, this causes the assertion because that is an invalid state
	  in the interrupt handler. So I think that the root cause is that
	  there the asynchrony between incrementing the semcount.  This change
	  separates the list of IOBs:  Currently there is only a free list of
	  IOBs.  The problem, I believe, is because of asynchronies due
	  sem_post() post cause the semcount and the list content to become out
	  of sync.  This change adds a new 'committed' list:  When there is a
	  task waiting for an IOB, it will go into the committed list rather
	  than the free list before the semaphore is posted.  On the waiting
	  side, when awakened from the semaphore wait, it will expect to find
	  its IOB in the committed list, rather than free list.  In this way,
	  the content of the free list and the value of the semaphore count
	  always remain in sync (2017-05-16).
	* stm32_serial:  Fix freezing serial port.  Serial interrupt
	  enable/disable functions do not disable interrupts and can freeze
	  device when serial interrupt is received while execution is at those
	  functions. Trivially triggered with two or more threads write to
	  regular syslog stream and to emergency stream. In this case, freeze
	  happens because of mismatch of priv->ie (TXEIE == 0) and actually
	  enabled interrupts in USART registers (TXEIE == 1), which leads to
	  unhandled TXE interrupt and causes interrupt storm for USART.  From
	  Jussi Kivilinna (2017-05-17).
	* STM32 Ethernet: Add support for KSZ8081 PHY interrupts.  From
	  Sebastien Lorquet (2017-05-17).
	* IPv6: Fix net_ipv6_pref2mask().  From Masayuki Ishikawa (2017-05-18).
	* net procfs: Fix buffer corruption and refactor netdev_statistics.c.
	  From Masayuki Ishikawa (2017-05-19).
	* binfmt: Fix .dtor memory allocation.  From Masayuki Ishikawa
	  (2017-05-19).
	* stm32_i2c: make private symbols static.  From Juha Niskanen
	  (2017-05-19).
	* network IOCTL commands:  The only place in net/netdev/netdev_ioctl.c
	  where the interface state should change is for SIOCSIFFLAGS.  The
	  other ones .. SIOCSIFADDR, SIOSLIFADDR, SIODIFADDR ..  should not
	  change the link state.  From Sebastien Lorquet (2017-05-19).
	* drivers/wireless/ieee80211: Add support for AP scanning.  From Simon
	  Piriou (2017-05-21).
	* drivers/audio:  Add cs43l22 audio driver  STM32F4: Add I2S driver.
	  From Taras Drozdovsky (2017-05-21).
	* This is based on a patch by Taras Drozdovsky.  Basically, the delay
	  that was added during the integration of the CDC/ACM host driver was
	  interfering with streaming audio.  That delay was put there to
	  prevent build endpoints from hogging the system bandwidth.  So what
	  do we do?  Do we hog the bandwidth or do we insert arbitrarity
	  delays.  I think both ideas such (2017-05-21).
	* Replace sprintf() with snprintf() in pipe.c.  From Nobutaka Toyoshima
	  (2017-05-22).
	* drivers/bch: Fix 'Missing Unlock' in bchdev_driver.c.  From Masayuki
	  Ishikawa (2017-05-22).
	* FAT: Fix 'Missing unlock' in fs_fat32.c.  From Masayuki Ishikawa
	  (2017-05-22).
	* netdb: Fix time info in lib_dnscache.c.  From Masayuki Ishikawa
	  (2017-05-23).
	* STM32L4:  Add IWDG peripheral.  This is the same as for STM32 except
	  that prescale and reload can be changed after watchdog has been
	  started, as this seems to work on L4.  From Juha Niskanen (2017-05-23).
	* drivers/can: Add Microchip MCP2515 CAN Bus controller driver.  From
	  Alan Carvalho de Assis (2017-05-23).
	* button_upper:  Fix interrupt enabling for poll-events.  From Jussi
	  Kivilinna (2017-05-24).
	* netdb: Fix bugs in lib_gethostbynamer.c. This fix sets h_name in
	  struct hostent returned by gethostbyname().  From Masayuki Ishikawa
	  (2017-05-25).
	* TCP: Fix tcp_findlistner() in dual stack mode.  From Masayuki
	  Ishikawa (2017-05-25).
	* TCP: tcp_input() now receives IP domain as an input parameter vs.
	  deriving from the IP header length (2017-05-25).
	* Kinetis ADC: Various corrections and updates.  From David Sidrane
	  (2017-05-25).
	* drivers/lcd: Add driver for Nokia 5110 (Philips PCD8544).  From Alan
	  Carvalho de Assis (2017-05-26).
	* configs/stm32f103-miniumum: Add board support to use the Nokia 5110
	  LCD display driver.  From Alan Carvalho de Assis (2017-05-26).
	* configs/pic32mx7mmb:  Add support for the Pinquino toolchain
	  (2017-05-27).
	* configs/pic32mx7mmb: Repartition files to match newer
	  configurations.   Add support for PROCFS file system.  Default is now
	  Pinguino toolchain.  Verify networking (2017-05-27).
	* pthread_trylock: Fixes a problem in pthread_trylock() noted by
	  initialkjc@yahoo.com.  When CONFIG_PTHREAD_MUTEX_UNSAFE=y, the
	  special return value EAGAIN was not being detected due to differences
	  in reporting of returned values (2017-05-29).
	* vfs: fdopen:  Add missing file stream flags clearing.  Clear file
	  stream structure regardless of config options. Structure clearing is
	  needed as previous use of stream list entry might leave fs_flags
	  set.  From Harri Luhtala (2017-05-31).
	* drivers/input:  Add Cypress MBR3108 CapSense touch button driver.
	  From Juha Niskanen (2017-05-31).
	* STM32L4: gpio: put back EXTI line source selection.  From Juha
	  Niskanen (2017-05-31).
	* mtd/smart: Fix use of uninitialized variable.  From Jussi Kivilinna
	  (2017-05-31).
	* drivers/mtd/w25.c:  Erase sector only if it is not in erased state.
	  From Jussi Kivilinna (2017-05-31).
	* stm32f7:  Add SPI DMA support.  From Jussi Kivilinna (2017-05-31).
	* drivers/mtd/w25.c: Enable short delay after sector/chip erase.  From
	  Jussi Kivilinna (2017-05-31).
	* pthread robust mutexes:  Fix memmory trashing problem:  the main task
	  may also use mutexes; need to check thread type before accessing
	  pthread-specific mutex data structures.  Problem noted by Jussi
	  Kivilinna (2017-05-31).
	* STM32L4 RTC: store RTC MAGIC to backup reg, not to address zero.
	  From Juha Niskanen (2017-06-01).
	* drivers/{sensors,usbmisc}:  Fix uninitialized I2C frequency.  From
	  Juha Niskanen (2017-06-01).
	* mtd/config:  Add some error checks for I/O errors.  From Juha
	  Niskanen (2017-06-01).
	* pthread mutex:  Remove bogus DEBUGASSERT.  Problem noted by Jussi
	  Kivilinna (2017-06-01).
	* Tiva SSI:  Resolves issue 52 'Copy-Paste error in
	  tiva_ssibus_initialize()' submitted by Aleksandr Kazantsev
	  (2017-06-01).
	* nucleo-f4x1re User LEDS: Issue #51 reports compilation problems with
	  stm32_userled.c.  Reported by Gappi92 (2017-06-01).
	* tools/:  Add initialconfig.c so that perhaps in the future we will be
	  able to use this to generate a new configuration from scratch (rather
	  than having to derive new configurations from existing
	  configurations).  NOTE: Not yet intregated into the build system
	  (2017-06-02).

7.22 2017-09-06 Gregory Nutt <gnutt@nuttx.org>

	* Fix ELF loader up_checkarch on ARM arch.  From Cristian Condurache
	  (2017-05-09).
	* Kinetis:  Disable MPU when not in protected mode.  The hardware reset
	  state of the the MPU precludes any bus masters other then DMA access
	  to memory. Unfortunately USB and SDHC have there own DMA and will not
	  have access to memory in the default reset state.  This change
	  disabled the MPU if present on system startup.  From David Sidrane
	  (2017-06-02).
	* Kinetis:  teensy-3.x Define USBOTG-FS Read from FLASH access in board
	  config.  Allow the board config to define the USBOTG-FS to have Read
	  access to FLASH.  From David Sidrane (2017-06-02).
	* Kinetis:  usbdev clean up ensuring proper use of HW.  Remove magic
	  numbers from code, documented the use of undocumented bits.  Remove
	  comments and code that were not appropriate for this hardware.
	  Removed ifdef that's that were always compiled and removed code
	  blocks that were never compiled.  Ensure proper access order to
	  hardware.  Per the reference manual: disable endpoints prior to
	  configuring buffer descriptor, then enable endpoints Reorganize
	  interrupt processing order to offload data after processing errors.
	  Reorganize initialization so that there is a clear initialization
	  phase, reset phase for both the hardware and software structures.  By
	  breaking the initialization into smaller pieces, the reset interrupt
	  only resets the resources within the controller that should be reset.
	  Rework suspend and resume logic so they perform properly. Made attach
	  and detach functions optional. As they do not make sense for a bus
	  powered device.  Ensured the calls to up_usbinitalize
	  up_usbuninitalize do not violate the USB spec.  From David Sidrane
	  (2017-06-02).
	* WIP: wireless/ieee802154: More work on association/beacon-enabled
	  networks.  From Anthony Merlino (2017-06-02).
	* We developed a huge Changeset over a year ago to make USB Composite
	  configuration dynamical and be able to instanciate the CDCACM
	  multiple times inside this device.  We use this feature to switch
	  between one in normal and up to three CDCACMs in maintenance boot.
	  The control path starts in boardctl.c where the configuration for the
	  device is constructed.  There are still a few issues which I'll ask
	  you to have a look at before this beast can be merged.  (1) To be
	  able to construct the data dynamically I have changed some
	  USB-Structs to be packed. Maybe there are additional structs to
	  change (just for completeness – not for current functionality). (2)
	  I've added the Macro COMPILE_TIME_ASSERTION two times (in
	  usbmsc_desc.c and in cdcacm_desc.c) to stay private. Maybe you’ll
	  find a better place. It’s used to check the size of the structs
	  against the assumptions.  (3) I've changed the interface for some
	  USB-Functions to receive also the dynamic configuration. Maybe this
	  can be done more elegant.  (4) The original NuttX (without the patch)
	  seems to have problems with a Composite device holding a CDCACM and
	  an MSC. The USB SET CONFIGURATION request does not to work at all.
	  This makes the test fail under Windows and under Linux. Applying this
	  patch doesn’t change anything – because it only changes the
	  configuration – not the behavior. Maybe you’ll have a look at
	  this problem before applying the patch.  From Frank Benkert
	  (2017-06-01).
	* power: battery_charger: add ioctl for charging input current.  From
	  Juha Niskanen (2017-06-06).
	* MTD FLASH drivers:  The byte write method of several drivers had a
	  cloned error:  It was not locking the bus while performing byte write
	  operations (2017-06-06).
	* Kinetis:sim ensure isolation of clock dividers for 0 value case.
	  This fixes a bug were a SoC does not have a clockdivN register and
	  passes a 0 for the init value. This prevents overflow of the 0
	  decremented to -1 (0xffffffff) spilling over to other clockdivN
	  feilds.  From David Sidrane (2017-06-06).
	* teensy-3.x:Removed call to khci_usbattach.  The call is not need by
	  the driver if CONFIG_USBDEV_BUSPOWERED=y.  The class register will
	  enable the soft connect pull up. The khci_usbattach call only set a
	  flag, and that  flag is only tested in the class register. On a USB
	  powered device if we are running we are attached.  From David Sidrane
	  (2017-06-06).
	* teensy-3.x:Refreshed config and made board self powered.  From David
	  Sidrane (2017-06-06).
	* Kinetis:USB-FS driver.  Removed the notion of attached. The
	  khci_usbattach is call early in the init either in board_initalize or
	  in board_app_initalize. In either case it is always done prior to the
	  the class register.  Therefore the khci_usbattach call only set a
	  flag, and that flag is only tested in the class register. The class
	  register will enable the soft connect pull up.  From David Sidrane
	  (2017-06-06).
	* Kinetis:Fixed waning for kinetis_mpudisable. Missing header file
	  added.  From David Sidrane (2017-06-06).
	* STM32L4:  Ad support for the STM32L475 family.  Incomplete -- still
	  needs pinmap, rcc, otgfs, syscfg (2017-06-08).
	* STM32L4:  Add L475 syscfg register definitions (2017-06-08).
	* STM32L4:  Add STM32L475 RCC definitions/logic (2017-06-08).
	* STM32L4: Add STM32L475 OTGFS header file.  Not fully reviewed
	  (2017-06-08).
	* STM32L4: Add STM32L475 pinmap.  Initial cut is just the the L476
	  pinmap with unsupported devices removed (2017-06-08).
	* configs/stm32f103-minumum SPI: SPIDEV_WIRELESS used when this has
	  changed to SPIDEV_CONTACTLESS. From Nicolas Estibals (2017-06-08).
	* stm32f103-minimum: dd GPIO device driver example for
	  STM32F103-Minimum.  This chang eadds the initialization needed by
	  stm32f103-minimum board to support the NuttX GPIO Subsystem.  From
	  Alan Carvalho de Assis (2017-06-08).
	* STM32L4:  Remove some C++ style comments (2017-06-08).
	* configs/:  a few more places where SPIDEV_WIRELELSS should be
	  SPIDEV_CONTACTLESS (2017-06-08).
	* kinetis: lpserial fixed header inclusion.  From David Sidrane
	  (2017-06-08).
	* Kinetis:  SPI driver.  From David Sidrane (2017-06-08).
	* Fix C++ __guard implementation for ARM.  The standard C++ ABI that
	  most platforms follow defines __guard to be 64 bits.  The existing
	  implementation of libxx_cxa_guard.cxx follows this.  However, the
	  32-bit ARM C++ ABI defines it as 32 bits instead, and changes the
	  meaning slightly so only the lowest bit is used. This matters because
	  GCC creates guard symbols without regards to what libxx_cxa_guard.cxx
	  says.  So on ARM, gcc allocates 4 bytes, but __cxa_guard_release
	  writes 8 bytes, zeroing out another unlucky variable nearby. Fix it
	  by special-casing 32-bit ARM in libxx_cxa_guard.  From Jim Paris
	  (2017-06-09).
	* vfs/poll: fix timeout calculation.  From Jim Paris (2017-06-09).
	* stm32f103-minimum: Fix a small BUG when reading from output pin.  We
	  need a different read_ops to read from output pin. This patch fixes
	  the issue.  From Alan Carvalho de Assis (2017-06-09).
	* testbuild:Added -x to fail build on errors for CI.  On CI we want to
	  know ASAP of a failure. This adds the -x (exit on build failures)
	  option to faclitate that behavior.  Use ${MAKE} ${MAKE_FLAGS} for
	  make invocation.  When -x is provided change MAKE_FLAGS to --silent
	  --no-print-directory and set -e.  Ignore exit status when using grep
	  for checking for CONFIG_NXWM=y.  From David Sidrane (2017-06-10).
	* stm32f103-minimum: Use separated read_ops for GPIO interrupt pins.
	  From Alan Carvalho de Assis (2017-06-11).
	* STM32F33: Fix hrtim definitions, Add beginning of HRTIM driver.  From
	  Mateusz Szafoni (2017-06-11).
	* STM32 HRTIM: add character driver.  From Mateusz Szafoni
	  (2017-06-11).
	* nucleo-f334r8: add HRTIM initialization.  From Mateusz Szafoni
	  (2017-06-11).
	* i.MX6: Fix a wrong parameter passed when calling irq_attach() in
	  imx_serial.c.  From Masayuki Ishikawa (2017-06-12).
	* Based on the last PR, review all serial driver vector attachment.
	  Found one additional error and updated all relevant drivers to
	  current interrupt parameter passing (2017-06-12).
	* gethostbyname_r: Fix check for space in buffer (2017-06-12).
	* MTD M2PX: If we READ while a write/erase is pending, the command is
	  ignored and the write/erase continues. If we dont catch this
	  situation we will return garbage to the user because the flash will
	  not execute the command.  So READ MUST wait for write completion, and
	  before that, the bus must be locked since it's a precondition to
	  calling waitwritecomplete().  From Sebastien Lorquet (2017-06-12).
	* MTD FLASH driver: Clone Sebastien Lorquet's m25px change to at25,
	  is25xp, ramtron, and sst25xx (2017-06-12).
	* STM32 HRTIM: GPIOs configuration + EEV and FAULT strucutres.  From
	  Mateusz Szafoni (2017-06-12).
	* stm32/stm32l4 PWM: While attempting to output a 70 MHz square wave
	  from the timer output of a STM32 clocked at 140 MHz (which works fine
	  in baremetal C), I stumbled on what I believe to be an error in
	  arch/arm/src/stm32/stm32_pwm.c.  Line 1304 we are told that: reload =
	  timclk / info->frequency;  which I belive to be incorrect, it should
	  be:  reload = timclk / info->frequency - 1; since starting to count
	  from 0, if I want to output half of the TIM clock, I must count to 1
	  and not to 2.  Surely enough, the original code did output 140/3=47
	  MHz, while this correction does allow the output up to 70 MHz.  I am
	  not sure this affects most users generating slow PWM (e.g. PX4) but
	  for frequencies close to the PCLK, indeed the difference becomes
	  significant.  From JM (2017-06-13).
	* mtd/w25: add missing locking and fix SPI_SELECT usage for
	  w25_unprotect.  From Jussi Kivilinna (2017-06-13).
	* mtd/w25: wait for BUSY flag to clear in w25_readid and w25_unprotect.
	  W25Q128 datasheet says that all instructions expect 'Read Status
	  Register' and 'Erase/Program Suspend' are ignored when BUSY flag in
	  status register is '1'. Therefore wait for busy flag to clear in
	  w25_readid() and w25_unprotect().  From Jussi Kivilinna
	  (2017-06-13).
	* freedom-k66f:  Use SPI driver.  Initalize SPI1 on connector J6. No
	  real use, as of yet.  From David Sidrane (2017-06-13).
	* pthreads:  Move functions from sched/pthreads to libc/pthreads.
	  These functions just coordinate other OS interface calls but are not
	  a fundamental OS interfaces and, hence, do not belong within the OS:
	  pthread_yield(), pthread_once(), pthread_cond_init(),
	  pthread_cond_destroy(), pthread_barrier_init(),
	  pthread_barrier_destroy(), and pthread_barrier_wait() (2017-06-14).
	* multiple fixes for stm32f1xx RTC clock:  (1) compile issues because
	  of missing RTC_MAGIC #defines, (2) missing functionality based on
	  RTC_MAGIC in RTC based on stm32_rtcounter.c, (3) IRQ setup from
	  up_rtc_initialize was later reset in up_irqinitialize, (4) write
	  access to backup registers without enabling access to backup domain,
	  (5) possible races in set/cancel alarm.  tested with STM32F103C8
	  only.  device now wakes up from forced STANDBY mode by alarm.  From
	  Leif Jakob (2017-06-14).
	* stm32f103-minimum: Fix compiler error in MCP2415 logic (2017-06-14).
	* Fixed ARMv7-M Toolchain setting.  Cortex-M4 only have Single
	  Precision FPU.  From Hidetaka Takano (2017-06-14).
	* wireless/ieee802154: Lots of fixes, cleanup, new functionality.
	  Functional.  From Anthony Merlino (2017-06-14).
	* Fixed ARMv7-M Toolchain definition for Cortex-M4.  From Hidetaka
	  Takano (2017-06-15).
	* Improve configure.sh behavior:  (1) enable to call from top
	  directory. (2) enable to designate direct path for config.  (3)
	  install .gdbinit if the target has.  From Hidetaka Takano
	  (2017-06-15).
	* Update tools/configure.c to same functionality as configure.sh.  Add
	  an array of optional file names.  Currently, .gdbinit is the only
	  optional file but other things like IDE-specific project files might
	  need to be copied as well (2017-06-15).
	* STM32 HRTIM: outputs enable, period and compare functions, cosmetics.
	  From Mateusz Szafoni (2017-06-15).
	* tool/configure will now copy Eclipse project files if they are
	  present in the board directory file (2017-06-15).
	* configs/.gitignore:  Make sure that any .gdbinit, .project, or
	  .cproject files are ignore so that they are less likely to be
	  included in a patch or PR (2017-06-15).
	* wireless/ieee802154: Fixes issue with wrong information being sent in
	  a rejected association response frame.  From Anthony Merlino
	  (2017-06-15).
	* wireless/ieee802154: Fixes issue with wrong information being sent in
	  a rejected association response frame.  From Anthony Merlino
	  (2017-06-15).
	* Rename configs/mrf24j40-radio to mrf24j40-mac (2017-06-15).
	* clicker2-stm32: Add a configuration that will, eventually, be used
	  for 6loWPAN testing (2017-06-15).
	* Fix a typo.  And typo in Kconfig file is reflect in all defconfig
	  files (2017-06-15).
	* SAMv7:  TWIHS driver add reference counting. From David Sidrane
	  (2017-06-15).
	* STM32 HRTIM: structures for deadtime and chopper, cosmetics.  From
	  Mateusz Szafoni (2017-06-16).
	* Clicker2-STM32:  Enable RAMLOG in mrf24j40-6lowpan configuration.
	  Update README (2017-06-16).
	* STM32 F4 FLASH:  Enable/disable the flash write protection on any
	  sector.  I have verified it to work on the stm32f427.  From Sebastien
	  Lorquet (2017-06-16).
	* STM32 SPI/I2S:  Back out a bad pin mapping change from
	  4ab2a3661ea57211f4ae12fe21c5de3454ba0ef2.  Try to staighten out some
	  I2C3 and SPI3 pin configuration stuff (2017-06-16).
	* Clicker2-stm32:  Allow both IEEE 802.15.4 MAC character and network
	  devices to be registered (2017-06-16).
	* Clicker2-STM32:  Enable networking and 6loWPAN in the
	  mrf24j40-6lowpan configuration.  Fix a couple of new 6loWPAN compile
	  issues revealed by this new configuration (2017-06-16).
	* Merge remote-tracking branch 'origin/master' into ieee802154
	  (2017-06-16).
	* clicker2-stm32: mrf24j40-6lowpan configuration needs to enabled the
	  ieee 802.15.4 MAC network device as well (2017-06-16).
	* stm32:flash add CONFIG_STM32_STM32F469 to list defining OPTCR1.  From
	  David Sidrane (2017-06-17).
	* ieee802.15.4 loopback:  Better simulation addressing: sort, extended,
	  panid, and IP address conversion (2017-06-17).
	* ieee802154 MAC: Fix a warning when compiled for a target with 64-bit
	  addressing (2017-06-17).
	* Update some 6loWPAN configurations based on changes to NSH Kconfig
	  (2017-06-17).
	* wireless/ieee802154: Fixes ordering of strings associated with
	  changed enum.  From Anthony Merlino (2017-06-17).
	* wireless/ieee802154: Renames mac802154_poll to mac802154_radiopoll to
	  be more obvious.  Merges shared logic for sending data request
	  commands.  Minor improvements and simplified logic.  From Anthony
	  Merlino (2017-06-17).
	* STM32 HRTIM: Faults and events configuration, timers mode
	  configuration, add hrtim ops, ADC triggering and DAC synch events.
	  From Mateusz Szafoni (2017-06-18).
	* Add RFC6775 header file (2017-06-18).
	* rfc6775:  Fix header, add references, correct naming.  This is NOT
	  ICMPv6, but part of 6LoWPAN that acts like ICMPv6 (2017-06-18).
	* wireless/ieee802154: Renames Kconfig option, adds option for
	  unimplemented receiver priority.  From Anthony Merlino (2017-06-18).
	* STM32 HRTIM:  Fix initialization bug, minor changes.  Remove unneeded
	  definitions.  From Mateusz Szafoni (2017-06-18).
	* IEEE 802.15.4 MAC: Add list management and prioritization logic that
	  will permit the MAC layer to support bound multiple clients
	  (2017-06-18).
	* ieee 802.15.4:  Need counting protection on the logic that releases
	  the notification resources.  Otherwise, notification handlers may be
	  operating with a stale pointer (2017-06-18).
	* IEEE 802.15.4 Network Driver:  Add logic to setup the network mask,
	  update the MAC-based IPv6 addressing when the network is brought up.
	  The idea is that addressing changes are supposed to occur only while
	  the network is down but won't take effect until the network is up
	  again (2017-06-18).
	* Swithches IEEE 802.15.4 based code to using byte arrays instead of
	  uint16_t values for short address and PAN ID.  From Anthony Merlino
	  (2017-06-19).
	* Throw error when error happens in the tcp_listen function.  From
	  Roland Takacs (2017-06-19).
	* Support listening sockets in the getsockname() function.  From Roland
	  Takacs (2017-06-19).
	* IEEE 802.15.4/6LoWPAN: Correct one more usage of saddr; also update a
	  README and the TODO list (2017-06-19).
	* STM32 ADC: invalidate dma buffer before use.  Missing invalidation
	  caused old samples being fetched from cache.  From Jussi Kivilinna
	  (2017-06-19).
	* Enable UDP example in clicker1-stm32/mrf24j40-6lowpan example, make
	  sure that CONFIG_EXAMPLES_UDP_NETINIT is set in all other
	  examples/udp configurations (2017-06-19).
	* Use struct instead of pointer to the struct as sizeof argument in
	  memset in usbmsc.c.  Otherwise it leads to error: argument to
	  'sizeof' in 'memset' call is the same pointer type 'struct
	  usbmsc_lun_s *' as the destination.  From Oleg Evseev (2017-06-19).
	* /configs/clicker2-stm32/mrf24j40-6lowpan: Enables both client and
	  server UDP tests on the target; Update a README file (2017-06-19).
	* wireless/ieee802154: Cleans up some endianness issues and fixes poll
	  request issue.  From Anthony Merlino (2017-06-19).
	* STM32 L4: Set I2C SDA and SCL pins to open drain mode.  From Pekka
	  Ervasti (2017-06-20).
	* STM32 L4: I2C4 was writing to wrong RCC registers.  From Juha
	  Niskanen (2017-06-20).
	* STM32 F7: Set I2C4 SDA and SCL pins to open drain mode.  From Juha
	  Niskanen (2017-06-20).
	* 6LoWPAN: Add debug statements; Update configuration, need to specific
	  6LoWPAN compatible port numbers (2017-06-20).
	* mac802154_req_data() can return without releasing the exclsem
	  (2017-06-20).
	* STM32:  Allow clock frequencies > 168 Mhz on stm32f427/429.  We need
	  to enable the power overdrive for this case.  This patch allows the
	  required bits to be set in proper sequence.  It also modifies the
	  local register access operations to allow more than 16-bit registers.
	  From Sebastien Lorquet  (2017-06-20).
	* Kinetis:I2C driver added I2C3, reference counting and reset.
	  Refactored the driver to support reference counting and reset added
	  I2C3. From David Sidrane (2017-06-20).
	* ieee802154 network driver now retries if ieee802154_req_data()
	  returns EINTR.  In clicker2-stm32 6LoWPAN configuration, increased
	  the number of TX descriptors to match then number of IOBs
	  (2017-06-20).
	* Kinetis:I2C fixed mis-placed kinetis_i2c_endwait.  Fixed accedently
	  replaced post with wait.  From David Sidrane (2017-06-20).
	* ieee802154_req_data:  Don't modify the IOB until we are certain that
	  no EINTR errors will occur.  Otherwise, the retry will fail
	  (2017-06-20).
	* ieee802154 MAC: Free allocated TX descriptor if an error occurs after
	  the descriptor has been allocated (2017-06-20).
	* ieee802154: Adds some missing elements to start support for
	  beacon-enabled networks.  From Anthony Merlino (2017-06-20).
	* ieee802154: Fixes Kconfig naming for number of TX desc and number of
	  notifications.  From Anthony Merlino (2017-06-21).
	* pthread_mutex_unlock():  Missing check for the case where
	  pthread_mutex_lock() is called when the mutex is not locked.  In that
	  case, it would increment the underlying semaphore avove 1.  This is
	  the fix for a problem noted by initialkjc@yahoo.com (2017-06-21).
	* Missing option to select CONFIG_MAC802154_NNOTIF in Kconfig
	  (2017-06-21).
	* clicker2-stm32/mrf24j40-6lowpan:  Network now runs on LP work queue
	  (2017-06-21).
	* STM32 L4 DMA: Correct USART3_RX bad channel definition.  From Juha
	  Niskanen (2017-06-21).
	* 6LoWPAN: Correct an error in calculating the location of the UDP
	  header (2017-06-21).
	* wireless/ieee802154: Minor naming change to align better with coding
	  guidelines.  From Anthony Merlino (2017-06-21).
	* mrf24j40:  Fix a warning (which is actually an error) (2017-06-21).
	* 6LoWPAN: Correct a few addressing issues.  The apps/examples/udp test
	  now appears to be fully functional.  Also reserve two bytes at the
	  end of the frame for the FCS (2017-06-21).
	* Do not search net device when all-zeros address is used.  From Roland
	  Takacs (2017-06-22).
	* Fix problems in last commit noted by Jeongchan Kim:  last change
	  returned -EINVAL vs EINVAL; Treat the case where the mutex is already
	  unlocked just like the case where the mutex is held by another thread
	  -- return EPERM (2017-06-22).
	* Logic of a353602aa9cc50ed958df11af35e3972101b5f40 only applies if
	  CONFIG_NETDEV_MULTINIC (2017-06-22).
	* 6LoWPAN: Fixes needed when extended addressing is enabled.  Currently
	  breaks short addressing.  Loopback driver needs to initialize the MAC
	  meta data; Address decompression logic must have the MAC address to
	  handle the most common compression cases.  Fix a src/dest address
	  confusion.  Fix yet another addressing problem.  That does it.
	  Several recent, proper bugfixes unmasked a few errors in the 6LoWPAN
	  logic.  But I think full functionality is restored (2017-06-22).
	* ieee802154: Stubs out some SCAN.request code.  From Anthony Merlino
	  (2017-06-22).
	* drivers/net/tun.c: Use critical section instead of semaphore in
	  tun_ifdown().  From Masayuki Ishikawa (2017-06-23).
	* netdb:  Fixed buffer size used for sending DNS queries should depend
	  on the configured DNS name size.  From Ritjaina (2017-06-23).
	* 6LoWPAN: Add missing IPv6 address creation to HC1 decode logic. Fix a
	  typo in an index that prevented use with HC1 and extended addresses
	  (2017-06-23).
	* clicker2-stm32/mrg24j40-6lowpan: Add apps/examples/nettest.  Refresh
	  all configurations that enable the nettest (2017-06-23).
	* configs/sim/sixlowpan:  Disable I2C tool.  Not so useful in a
	  simulation (2017-06-23).
	* 6LoWPAN: TCP logic was not obeying MTU packet size limitations.
	  Other TCP-specific issues also fixed.  There remains a major
	  outstanding issue with ACK handling.  Handle case where the local
	  address is zero (listen socket).  Major re-architecting of TCP logic
	  to properly handle TCP stuf like ACKs and TPC windowing which were
	  not properly covered in the initial design.  Still does not work;
	  hangs waiting of ACKs.Various fixes for a clean build if either TCP
	  or UDP are disabled.  Given the current state of TCP, it is
	  recommended that you disable TCP.  HC06, copy TCP header as though it
	  were data.  Modify the the way TCP headers are transferred -- yet
	  again.  TCP packet reassembly now seems to work OK, but no there now
	  does not seem to be a listener on the port (2017-06-24).
	* IEEE802.15.4: Update RX statistics in network driver (2017-06-25).
	* 6LoWPAN TCP: Fix more ACK handling, fix some callback flag settings.
	  Now the TCP test appears fully functional on 6LoWPAN (2017-06-25).
	* ieee802154: Finishes transmission of beacon frames, and performing a
	  passive scan.  From Anthony Merlino (2017-06-25).
	* ieee80215: starts adding support for beacon-enabled networking.  From
	  Anthony Merlino (2017-06-26).
	* STM32L4 serial: Allow configuring Rx DMA buffer size.  From Juha
	  Niskanen (2017-06-26).
	* stm32f33xxx_rcc: cleanup + move hrtim clock source selection.  fix
	  typo in stm32f33xxx_rcc.h.  From Mateusz Szafoni (2017-06-26).
	* 6LoWPAN:  Fix duplicate and bad memcpy in loopback driver
	  (2017-06-26).
	* Beacon logic:  Damage control.  Looks like something went wrong with
	  the PR merge (2017-06-26).
	* ieee802154: Renames mac802154_indalloc to ieee802154_indalloc since
	  the functions are ieee802154 scoped functions.  Improves notification
	  freeing functionality.  Each notification now has a number of
	  clients.  When the last client calls free, the notification is freed
	  back to the pool.  From Anthony Merlino (2017-06-26).
	* Clicker2-STM32:  Add support for the Telnet client to the
	  mrf24j40-6lowpan configuration.  Useless at the moment because the
	  NuttX telnet daemon does not yet support IPv6 (2017-06-27).
	* ieee802154: Supports get request for coordinator address.  From
	  Anthony Merlino (2017-06-27).
	* ieee802154: Finishes beacon association functionality.  From Anthony
	  Merlino (2017-06-27).
	* smart: fix wrong freeing of device structure and use-after-free
	  issues on error paths.  From Jussi Kivilinna (2017-06-28).
	* net/: IPv6 packet input, Improve checks that the packet is destined
	  for us.  There might be some odd things that can happen in certain
	  forwarding scenarios (2017-06-28).
	* Fix -Werror=implicit-fallthrough on gcc7.  From Julien Lecoeur
	  (2017-06-28).
	* Fix warning implicit-fallthrough with arm-none-eabi-gcc 7.  From
	  Julien Lecoeur (2017-06-28).
	* 6LoWPAN:  Add configurable support for 6LoWPAN star topology.  With
	  this change, the endpoints which are the 'points' of the star will
	  forward all traffic to the coordinator.  The coordinator is assumed
	  to be the 'hub' of the star.  This function also implements IPv6
	  forwarding.  That forwarding implementation is minimal, just enough
	  to support the forwarding requirements of the star hub node
	  (2017-06-28).
	* Clicker2-STM32 + net/:  Add configurations to support the endpoint
	  and hub roles in a star topology.  Fix various things that broke when
	  IPv6 forwarding was enabled (2017-06-29).
	* 6LowPan:  Change how the destination node address is handled in the
	  star endpoint configuration.   When the star endpoint sent the IPv6
	  destination address, the HC06 compression logic elided the address --
	  meaning that it could be reconstructed by the recipient based on the
	  receiver's assigned short address.  However, when intercepted by the
	  hub, the uncompressed address does not know the short address of the
	  recipient and instead uses the short address of the hub.  This means
	  two things:  (1) it looks like  the hub address is the destination
	  address, and (2) the uncompressed UDP packet has a bad checksum.
	  This change assures that the destination IPv6 address is not elided
	  in the case of the star endpoint configuration (2017-06-30).
	* 6LoWPAN: Fix a misconception about HC06 16-bit IPv6 address
	  compression (2017-06-30).
	* 6LoWPAN fix compile issue in star hub configuration (2017-06-30).
	* This change backs out the 'misconception' fix of
	  76e6dba2e4bfab9515bef2866c5c59fd2a2f0fa0 and reimplements it in a way
	  that actually seems to work (2017-06-30).
	* ieee802154: Random fixes to get beacon-enabled networking more
	  stable.  From Anthony Merlino (2017-06-30).
	* 6LoWPAN:  TCP send logic was returning a failure in one case when, in
	  fact, the send was successful (2017-06-01).
	* include/nuttx/net and net/: Move private prototype of
	  netdev_foreach() from the public include/nuttx/net/net.h to the
	  private net/netdev/ndetdev.h header file where it belongs
	  (2017-07-01).
	* ieee802154: Cleans up some wireless logging.  Fixes resp_waittime
	  field in ieee802154_macattr_u.  Supports multiple incoming superframe
	  events.  From Anthony Merlino (2017-07-01).
	* Initial clang compile.  From Goran Mekić (2017-07-01).
	* Add CLANG definitions in Kconfig and Toolchain.defs (2017-07-02).
	* samv71-xult: Add support for the MRF24J40 radio and create a
	  mrf24j40-starhub configuration.  A few fixes to IPv6 and 6LoWPAN were
	  required to have 6LoWPAN and Ethernet coexisting.  Untested and
	  expect some complexity in the bring-up.  Put the serial console on
	  UART3, i.e., on a Arduino serial shield.  Add missing MRF24J40
	  bring-up logic (2017-07-02).
	* stm32f4 discovery: Add logic to register the button driver and the
	  user led driver if so configured.  From Jan Pobrislo (2017-07-02).
	* samv71-xult: Fix SP0 vs. TWHS0 in mrf24j40-starhub/defconfig; fix
	  copy-paste errors in SPI initialization logic.  Fix a typo in
	  MRF24J40 initialization (2017-07-02).
	* drivers/wireless/ieee802154: Moved radios to individual
	  sub-directories.  From Anthony Merlino (2017-07-03).
	* stm32f40xxx_rtcc ISR register and write protection fix.  From Eetu
	  Nevalainen (2017-07-03).
	* samv71-xult/mrf24j40-starhub:  Disabled CONFIG_BOARD_INITIALIZE;
	  Correct MRF24J40 interrupt edge.  Fix MRF24J40 interrupt pin.  Should
	  have pull-ups on interrupting inputs.   Reset pins backward.  Add
	  reset logic (but comment out because it is not necessary)
	  (2017-07-03).
	* Add some partial IP forwarding logic.  Add some fragments of TCP
	  forwarding logic (2017-07-03).
	* IPv6 forwarding logic must decrement the TTL and drop the packet if
	  the hop limit is exceeded (2017-07-04).
	* IP forwarding.  Adds a little more structure to handle passing
	  packets received on one network device to another network device.
	  Logic is still incomplete (2017-07-04).
	* UDP networking:  The TTL (time to live) was not being set in the IPv4
	  or IPv6 header unless the UDP socket was bound (2017-07-04).
	* SAME70-Xplained:  Add MRF24J40 support (2017-07-04).
	* I've found that the interrupts aren't enabled since nothing updates
	  them after btn_poll() marks the file descriptor structure as being
	  polling. I've managed to make it work with this change.  From Jan
	  Pobrislo (2017-07-04).
	* include/nuttx/input:  Remove bogus, obsolete keypad.h header file
	  (2017-07-04).
	* net/udp:  Fix a copy-paste error that could effect networking when
	  both IPv4 and IPv6 are enabled (2017-07-05).
	* configs/Board.mk:  Remove comment form end of line. In windows native
	  build, it appears to be trying to make that an extra parameter to the
	  AR command.  From Jeff (2017-07-05).
	* IP Forwarding: Flesh out TCP, UDP, and ICMPv6 packet forwarding
	  logic.  In checking if the Ethernet MAC address is in the
	  ARP/Neighbor table, add an additional check to skip in the case of
	  CONFIG_NET_MULTILINK and the devices is not an Ethernet device.  Add
	  IPv4 packet forwarding logic.  Initial commit is an untested clone of
	  the IPv6 forwarding logic with a few minor logic changes for IPv4
	  (2017-07-05).
	* IP forwarding: Add optional support to forward broadcast and
	  multicast packets.  Add missing ICMP support (2017-07-06).
	* FS: Remove DEBUGASSERT() in block_proxy() because the flags are
	  cleared later.  From Masayuki Ishikawa (2017-07-06).
	* Eliminate a warning with arm-none-eabi-gcc 7.1.0.  From Julien
	  Lecoeur (2017-07-06).
	* In arch/arm/src/stm32/Kconfig when the CPU is a STM32F4, some
	  STM32_HAVE_xx with xx = {OTGFS, TIM3, TIM4, SPI3, I2S3, I2C3} are
	  selected by default. But for F410 these peripherals are absent. This
	  change add tests to check if the target CPU is an F410 or not and
	  selects according to the situation.  This also adds a select for
	  STM32_HAVE_DAC1 present on this STM32 flavor.  From Gwenhael
	  Goavec-Merou (2017-07-06).
	* Rename CONFIG_STM32_STM32F40XX to CONFIG_STM32_STM32FXXXX since it is
	  used by F4 parts other than F40x (2017-07-06).
	* STM32 Kconfig: 'unfold' some of the dependencies to provide better
	  long term configuration support.  This also effective reverts the
	  recent 15b85738e7b5b9df6377f56e2a6a629346f87964 (2017-07-06).
	* ICMPv6:  Fix so that ICMPv6 can be used with 6LoWPAN (2017-07-06).
	* IPv6 Neighbor: Update table format to support IEEE 802.15.4 MAC
	  addresses (2017-07-06).
	* configs/Board.mk:  Remove quotes from CONFIG_ARCH_FAMILY.  Causes
	  problems with Windows native build.  From Jeff (2017-07-06).
	* IP forwarding design simplication; might save some memory.  Also fix
	  some compile issues introduce with last commit in MULTINIC
	  configration (2017-07-06).
	* IP Forwarding: Another IP forwarding design simplification:  Remove
	  an unnecessary field from state structure (2017-07-06).
	* ICMPv6:  Fix an address size calculation that was bungled in a recent
	  commit (2017-07-06).
	* Networking:  Improve naming and simplify some logic of previous
	  commit (2017-07-07).
	* Networking:  Correct some issues that prevent TCP from working
	  correctly when both IPv4 and IPv6 are enabled (2017-07-07).
	* Add definitions that will permit TUN-only networking (2017-07-07).
	* Move TUN ioctl commnd to include/nuttx/net/ioctl.h so that it will
	  always be unique.  It a error in netdev_register: it was not handling
	  device names properly when TUN is the only network device
	  (2017-07-07).
	* sim/ipforward:  Add an IP forwarding configuration using TUN devices
	  and apps/examples/tun (2017-07-07).
	* In TUN driver, do all polling on worker thread.  Otherwise, the stack
	  gets very deep (2017-07-07).
	* IP forwarding:  Major rearchitecting of the outgoing portion of the
	  IP forwarding logic necessary into to properly received
	  device-related forwarding events (2017-07-07).
	* ieee802154: Changes mac locking/unlocking to aid in debugging.  From
	  Anthony Merlino (2017-07-07).
	* IP forwarding:  Remove some unnecessary data structure definitions
	  (2017-07-07).
	* Makefile.unix: Add savedefconfig target.  From Gwenhael Goavec-Merou
	  (2017-07-08).
	* Add Gwenhael's change to Makefile.win and update README.txt to
	  described the new make target (2017-07-08).
	* IP forwarding:  Two bugfixes (1) IPFWD poll event must be unique and
	  different from other device poll events otherwise, some other waiting
	  task might get the poll, (2) Add logic necessary to forward 6LoWPAN
	  packets (2017-07-08).
	* net/procfs:  Fix some spacing when both IPv6 and IPv4 are enabled
	  (2017-07-08).
	* Networking routing tables: Fix a compilation error when IPv6 and
	  routing are enabled (2017-07-08).
	* ICMPv6:  Add 6LoWPAN and IP forwarding support (2017-07-09).
	* configs/b-l475e-iot01a:  Add basic support for the STMicro
	  b-l475e-iot01a board.  From Simon Piriou (2017-07-09).
	* IP Forwarding:  Fix a compile problem when IP forwarding of broadcast
	  messages is enabled (2017-07-09).
	* ieee802154: mac802154_purge_timeout was not unlocking MAC before
	  returning.  From Anthony Merlino (2017-07-09).
	* ieee802154: Minor bug fix.  Purging of indirect transaction was not
	  unlocking MAC.  From Anthony Merlino (2017-07-09).
	* Makefile.*: Add CONFIG_ARCH_CHIP_* definitions to defconfig in
	  savedefconfig target.  Last of the conversions of defconfig files to
	  compressed format (2017-07-09).
	* ieee802154: Improves internal timer logic to handle work serially.
	  Before, the MAC timer used a watchdog to schedule work with the high
	  priority worker queue.  However, since everything in the MAC is
	  supposed to be serialized through the use of the high priority work
	  queue, but the timer uses a watchdog, there are some unintended
	  consequences. To simplify, we now use the delayed work feature of the
	  work queue.  From Anthony Merlino (2017-07-09).
	* Update configure.sh, configure.bat, configure.c:  With compressed
	  format, part of the installation requires that we run 'make
	  olddefconfig' to restore the uncompressed defconfig format.  Also,
	  while I was at it, I also added options to select host platform on
	  configure command line (2017-07-10).
	* tools/refresh.sh: Now runs make savedefconfig before copying the new
	  defconfig file in place;  Also, added a new option --defaults.  Since
	  the number of defaults that you now have to answer is so large, the
	  option lets you just accept the default values.  So it works just
	  like --slilent but still prompts you for the decision to save or
	  discard the new defconfig file (2017-07-10).
	* tools/tesbuild.sh: Fix missing $ before variable name (2017-07-10).
	* configs/clicker2-stm32: Adds support for per-function-call stack
	  checking.  From Anthony Merlino (2017-07-10).
	* drivers/wireless/ieee802154/mrf24j40: Minor timing fix. Matches
	  recommended value in datasheet.  Splits up driver into multiple files
	  to make it easier to navigate.  Fixes issue with non-beacon enabled
	  mode.  From Anthony Merlino (2017-07-10).
	* IP Forwaring.  Fix some errors in ipforwar.h when
	  CONFIG_NET_STATISTICS is enabled, but CONFIG_NETDEV_MULTINIC is not.
	  Add some forward references that are needed when
	  CONFIG_NETDEV_MULTINIC is not enabled. ipfwd_dropstats needs to
	  include errno.h (2017-07-10).
	* STM32 TIM3/4 are always 16-bits; never 32-bits.  Noted by Eetu
	  Nevalainen. (2017-07-10).
	* Build System:  It is no longer necessary to have a unique Make.defs
	  file for each configuration.  A board may share a common Make.defs
	  file in the scripts directory.  Some duplicate Make.defs files
	  removed; Some common Make.defs file moved to the scripts/
	  sub-directory (2017-07-10).
	* configs/clicker2-stm32/mrf24j40-mac: Updates stack size to 2048 to
	  avoid random stack overflows when logging is enabled.  From Anthony
	  Merlino (2017-07-10).
	* Add small hello example for stm32f103-minimum board.  From Alan
	  Carvalho de Assis (2017-07-10).
	* ieee802154: Many small bug fixes clean-ups that help stabilize the
	  functionality.  From Anthony Merlino (2017-07-10).
	* SAML21 I2C driver.  Developed for and contributed with permissin from
	  Filament company.  From Alan Carvalho de Assis (2017-07-11).
	* SAMD/L21 I2C:  Another update... needs to use
	  enter/leave_critical_section vs. old irqsave/restore (2017-07-11).
	* Remove duplicate Make.defs files in configs/.  Move remaining, common
	  Make.defs files to board/scripts directory (2017-07-11).
	* SAMD21:  Fix some SPI-related issues.  From Matt Thompson
	  (2017-07-11).
	* ICMPv6 w/Autoconfiguration:  Fix a compile issue introduced with
	  recent change for 6LoWPAN support (2017-07-11).
	* sockets: Coding fix fix + minor structuring for forthcoming socket
	  interface logic (2017-07-11).
	* drivers/wireless/ieee802154/mrf24j40/: Fixes bug causing radio to
	  cease transmitting.  From Anthony Merlino (2017-07-11).
	* ieee802154: Notify radio layer of changes in devmode.  From Anthony
	  Merlino (2017-07-12).
	* drivers/mrf24j40: Hook in setdevmode from newly added radio attribute
	  setting.  From Anthony Merlino (2017-07-12).
	* ieee802154: Set devmode to endpoint on MAC layer reset.  From Anthony
	  Merlino (2017-07-12).
	* I was having issues with the bus freezing up .. slaves holding SDL
	  low.. so I rewrote a good portion of the interrupt logic based on the
	  application notes from Atmel.  One major improvement is using the
	  RXNACK flag in the STATUS register, which indicates that no device
	  responded to an address packet. Assuming that the chip will always
	  give an interrupt status, I believe it's possible to eliminate the
	  timer as well.  From Matt Thompson (2017-07-12).
	* SAMD/L21:  Add a USB driver.  Developed for Filament Inc. by Offcode,
	  LTD.  From Janne Rosberg (2017-07-12).
	* drivers/mrf24j40: Adds header guards to mrf24j40_reg.h.  From Anthony
	  Merlino (2017-07-12).
	* C library:  Fix an error in mkstemp() the could result in an infinite
	  loop.  From Alan Carvalho de Assis (2017-07-12).
	* SAMD/L21:  Need to preserve errno value across syslog() call
	  (2017-07-12).
	* SocketI/F:  Initial steps to add a socket interface to the
	  networking.  Each address family will have an interface that
	  describes how to perform socket operations on that address family.
	  Currently only a couple of methods are defined in the table as a
	  proof of concept.  More to come.  Currently there are only tables for
	  the INET/INET6 family, the Unix LOCAL family, and the raw PACKET
	  family.  Hopefully there will be AF_IEEE802154 and AF_BLUETOOTH
	  comming down the pike.  Add recvfrom() method to interface
	  (2017-07-12).
	* ieee802154: Fixes setting devmode logic.  From Anthony Merlino
	  (2017-07-13).
	* drivers/mrf24j40: Fixes issues with sleeping for beacon enabled
	  networking.  From Anthony Merlino (2017-07-13).
	* Fixes timing issues for beacon enabled coordinators and endpoints.
	  From Anthony Merlino (2017-07-13).
	* Socket I/F: Added bind(), connect(), listen(), accept(), close(),
	  addref() and sockcaps() interfaces (2017-07-13).
	* ieee802154: Fixes issue with association on beacon-enabled
	  networking.  From Anthony Merlino (2017-07-13).
	* drivers/wireless/mrf24j40: Fixes math error for calculating sleep
	  count values.  From Anthony Merlino (2017-07-13).
	* STM32 F7 Ethernet:  Fix typo in header; Add memory sync barrier
	  between writing to DMA TX descriptor and restarting DMA TX. Avoid
	  calling work_queue on pollwork if it's already queued, just skip a
	  poll cycle instead.  Nucleo-144: Fix RMII TXD1 signal, connected to
	  PB13 not to PG14.  From savinz (2017-07-14).
	* Socket I/F: Added getsockname() interfaces.  Add address family
	  support for poll() and sendfile() (2017-07-14).
	* tools/refresh.sh:  Update so that it can find the Make.defs file in
	  the new location (2017-07-15).
	* Numerous fixes, updates generalizations needed in order to merge
	  Frank Berkert's massive USB composite change of June 1 into master.
	  Too many changes to summarize adequately here (2017-07-16).
	* Makefile.win would only create uboot images for ARM.  MIPS support
	  also needed.  From Lwazi Dube (2017-07-16).
	* IEEE 802.15.4 MAC:  Disable option to select interrupt-level meta
	  data allocator (2017-07-16).
	* ieee802154: Adds retry count to tx descriptor.  Renames ack_wait_dur
	  to ack_waitdur and removes it from private mac struct.  From Anthony
	  Merlino (2017-07-16).
	* STM32 F7: I2C4_SDA can also be on GPIO PB7.  From Titus von Boxberg
	  (2017-07-16).
	* STM32 F7:  Definitions for I2C4, SDMMC2.  Adapted RAM start / size to
	  internal SRAM.  From Titus von Boxberg (2017-07-16).
	* Networking: When upd_input() cannot process a packet, it returns
	  ERROR so that network drivers may try calling ipv4_input() later.  In
	  this case, it must also set d_len to zero.  Otherwise, all network
	  drivers will assume tht there is also an outgoing packet.  This
	  results in a gratuitous ARP (2017-07-17).
	* STM32 F7:  do not enforce CONFIG_STM32_CCMEXCLUDE for
	  CONFIG_ARCH_CHIP_STM32F7, macro rename STM32 -> STM32F7, #include
	  corrections.  renamed STM32_LCDTFT_BASE to STM32_LTDC_BASE for
	  consistency.   macro rename STM32 -> STM32F7.  initial
	  (dysfunctional) lcd configuration (from STM32).  From Titus von
	  Boxberg (2017-07-17).
	* STM32 F7:  option for DSI output, inconsistency: the stm32f746 does
	  not feature a DSI interface.  compileable with LTDC_INTERFACE and
	  LTDC_USE_DSI.  From Titus von Boxberg (2017-07-18).
	* ieee802154:  Adds special attribute that can be used to perform a
	  regdump of the radio.  Sets txdesc retrycount to the maxretries MAC
	  attribute when allocated.  From Anthony Merlino (2017-07-18).
	* STM32 F7: Added functions for DSI clock source selection.  From Titus
	  von Boxberg (2017-07-18).
	* Network poll:  Remove logic conditioned on non-existent HAVE_NET_POLL
	  (2017-07-19).
	* CDC/ACM.  Fix several known problems resulting from merge of USB
	  composite device.  That merge now breaks some of the non-composite
	  USB devices.  These fixes are for CDC/ACM (2017-07-19).
	* SAMD21:  Changes needed to get USB working.  From Matt Thompson
	  (2017-07-19).
	* Initial port to STM32F769I-DISCO.  From Titus von Boxberg
	  (2017-07-20).
	* libc/math:  Fix wrong ouput in modf() API.  The sign of integral part
	  given by the modf() should be same as sign of input.  But for inputs
	  between 0 and 1, the sign of integral part was not same as sign of
	  input.  From Lokesh B V (2017-07-20).
	* libc/math: Fix wrong ouput in ceil() API.  Ex:for input x = 1.0, the
	  ouput should be 1.0, but the ouput was 2.0.    From Lokesh B V
	  (2017-07-20).
	* USB device:  Rename usbdev_description_s to usbdev_devinfo_s to avoid
	  any more confusion of naming with device descriptions in the future.
	  Instances of usbdev_devinfo_s are now called devinfo vs devdesc when
	  is a bad naming collision (2017-07-20).
	* USB MSC: Add missing logic to define endpoints.  The composite
	  changes broke the the non-composite, USB MSC only case because it
	  omitted the critical setup when USB MSC was not part of the composite
	  (2017-07-20).
	* libc/stdlib: (1) Fix an error in mkstemp() the could result in an
	  infinite loop.  (2)  Fix for wrong output in some cases.  For
	  Example: (a) input: "FILEXX", output: "FILE00" and repeats same
	  output for further invocations of mkstemp(). But, the ouput has to be
	  FILE01, FILE02, ...., FILEZZ. (b) input: "FILEXXXXXX", output:
	  "FILE100000", for next invocation "FILE200000" and so on.  But it's
	  good, if the ouput goes like FILE000001, FILE000002, ..., FILE000101,
	  ...  From Lokesh B V (2017-07-21).
	* configs: add stm32f334-disco basic support.  From Mateusz Szafoni
	  (2017-07-21).
	* USB composite:  Remove references to CDC/ACM and USB MSC from
	  composite logic.  They are no longer coupled (2017-07-21).
	* nucleo-f334r8: UART2 is default serial port (STLINK Virtual Port).
	  From Mateusz Szafoni (2017-07-22).
	* STM32 HRTIM: add slave timers private data, fix some bad definitions,
	  some assertions.  From Mateusz Szafoni (2017-07-22).
	* b-l475e-iot01a: Add initial, unverified support for the
	  SPSRGF/Spirit1 module.  Add a configuration for testing sprit radio
	  (2017-07-22).
	* epoll: fix epoll_wait function.  From Simon Piriou (2017-07-22).
	* sim arch: Add non blocking read to devconsole driver.  From Simon
	  Piriou (2017-07-22).
	* sim arch: poll for TX frames to speed up driver.  From Simon Piriou
	  (2017-07-22).
	* sim arch: fix mkdir issue in GNU target.  From Simon Piriou
	  (2017-07-22).
	* drivers:  add generic upper-half driver for SMPS.  From Mateusz
	  Szafoni (2017-07-23).
	* Add power-related debug output (2017-07-23).
	* Move SMPS driver to drivers/power (and header to
	  include/nuttx/power).  Rename debug to IOCTLs to more general power
	  naming; create a separate file to coordinate power-related IOCTL
	  commands (2017-07-23).
	* STM32 F7: enable APB2 DSI clock.  From Titus von Boxberg
	  (2017-07-26).
	* drivers/leds: Add support for inverted LEDS.  See common anode RGB
	  LED discussion in the Yahoo group.  From Jeff (2017-07-27).
	* drivers/analog:  Fix some data alignment issues in the ADC driver
	  (2017-07-27).
	* STM32 F7: added missing config option for register value debugging.
	  From Titus von Boxberg (2017-07-27).
	* STM32 F7: No FSMC, only FMC for STM32F7.  From Titus von Boxberg
	  (2017-07-27).
	* sig_timedwait:  Pending signal structure used after it has been
	  releasd.  From anonymous Bitbucket Issue 59 (2017-07-27).
	* Add driver for LTC4151 current and voltage monitor.  From Giorgio
	  Groß (2017-07-28).
	* drivers/leds: Lightness correction for RGB LED driver.  From Jeff
	  (2017-07-28).
	* We discovered a problem with the samv7 mcan driver which results,
	  under some circumstances, in a very high CPU load.  The problem
	  occurs, and is easily reproducible, if the device is connected to a
	  CAN network with a wrongly configured CAN speed (baud rate). In our
	  tests we set the CAN speed of the device to 1000000 and the speed of
	  the other CAN nodes to 500000. The device is restarted and sends a
	  CANopen "bootup message" to the CAN network. This results in huge
	  amount of errors messages on the CAN bus, probably because of the CAN
	  feature for acknowledging error messages. The error messages can’t
	  be read by the device because of the misconfigured CAN speed, instead
	  the CAN chip reports lots of errors, which are reported to the
	  application which uses the CAN driver (CONFIG_CAN_ERRORS is enabled).
	  The CAN errors are reported from the CAN chip via interrupts and thus
	  the interrupt load is very high in this scenario. To fix the problem
	  the driver now disables each RX error interrupt after it is occurred.
	  The RX error interrupts are turned back on if at least one CAN
	  message is received successfully.  From Stefan Kolb (2017-07-28).
	* tcdrain implementation based on a new term ioctl.  From Sebastien
	  Lorquet (2017-07-28).
	* Spirit Network Driver:  Create build directories, Add radio
	  initialization, interrupt handling logic, packet transmissin and
	  reception logic.  Add some hooks that will eventually support address
	  filtering (2017-07-28).
	* STM32 F7: HEAP2 depends on CONFIG_ARCH_HAVE_HEAP2, not on particular
	  FMC RAM type.  From Titus von Boxberg (2017-07-28).
	* STM32 F7:  No board specific dithering values used; corrected
	  dithering init.  Corrected LIPOS/LIPCR calculation.  Change only
	  polarity bits in LTDC_GCR.  From Titus von Boxberg (2017-07-29).
	* STM32_RCC_DCKCFGR2 has nothing to do with PLLI2S; PLLI2S is not
	  dependent on LTDC, instead on SAICLK1/2 generated from PLLI2S.  From
	  Titus von Boxberg (2017-07-29).
	* To use an external oscillator module (not just a crystal) with the
	  STM32F4, one needs to enable the HSEBYP bit in the RCC_CR register.
	  This change allows an integrator to define STM32_RCC_CR_HSEBYP in
	  their board.h file if they want this configuration.  From Jeff
	  (2017-07-30).
	* 6LoWPAN PktRadio:  Some initial changes to support raw packet radios
	  without IEEE 802.15.4 with 6LoWPAN. Add missing MetaData-related
	  prototypes and initialization logic.  Perform a major renaming to
	  make room in the 6LoWPAN name space for packet radios.  Replace
	  metadata input parameter type from struct ieee802154_data_ind_s to
	  void*.  This permits radios with different MAC metadata to interact
	  with 6LoWPAN.  Includes many changes to handle variable length radio
	  addresses.  No longer just short and exteneded; any length.Remove
	  explicit type struct ieee802154_frame_meta_s from derive interface
	  methods.  Replace with a opaque void * type so that other radio meta
	  data structures may use the interfaces.  Add a new radion interface
	  to get properties of the radio.  Spirit:  Finish packet I/O interface
	  with the network.  Fix case where source and destination IP address
	  were backward.  Fix some compile issues when star topology support is
	  enabled. Condition out some types that depend on definitions that are
	  only available with 6LoWPAN is enabled (2017-07-30).
	* STM32L4 PWR: correct PWR_SR2 REGLPS and REGLPF bits, add port I
	  registers.  Also remove duplicate section from Kconfig.  From Juha
	  Niskanen (2017-07-31).
	* STM32L1:  Add base address for TIM11.  From Juha Niskanen
	  (2017-07-31).
	* net/local: fix accept for local stream sockets.  From Jussi Kivilinna
	  (2017-07-31).
	* network: Move USRSOCK specific code from from inet_sockif to
	  usrsock_sockif.  Fix USRSOCK to work with recent changes to
	  networking layer.  From Jussi Kivilinna (2017-07-31).
	* PktRadio/6LoWPAN: Add a loopback driver for testing on the simulator.
	  Fix more issues related to single byte radio addressing.  Some
	  initial fixes resulting for early testing with loopback device
	  (2017-07-31).
	* Simulator: Protect a few more NuttX symbols from collisions with host
	  symbols (2017-07-31).
	* STM32 F7: added function for reset.  From Titus von Boxberg
	  (2017-07-31).
	* IoT Board/Spirit:  Fix a few issues that interfered with testing.
	  Move console to the VCOM port (USART) for all configurations.  Rename
	  the spirit-mac configuration to spirit-6lowpan.  Add lots of debug
	  output the spirit network driver (2017-07-31).
	* drivers/serial/serial.c:  Add support for TCFLUSH.  From Sebastien
	  Lorquet (2017-08-01).
	* Fixes for compilation of stm32f746g-disco.  From Ivan Ucherdzhiev
	  (2017-08-01).
	* stm32f746g-disco:  Make the initialization logic identical to the
	  standard way that is done for all other board (2017-08-01).
	* serial.c:  Finish implementation of TCDRAIN.  Based partly on logic
	  from Sebastien Lorquet (2017-08-01).
	* serial.c:  Use common TX drain logic when closing a driver as with
	  the TCDRAIN IOCTL (2017-08-01).
	* Spirit network driver:  Network driver needs to setup IP address
	  based on configured node address.  If no node address is provided,
	  then it will use a default.  Make sure device is in READY state after
	  reset and before changing to STANDBY.  Add a function to wait for a
	  state change with a timeout (2017-08-01).
	* network procfs:  Fix so that PktRadio address are shown correctly
	  (2017-08-01).
	* arch/arm/src/lc823450: Initial support for ON Semiconductor LC823450.
	  From Masayuki Ishikawa (2017-08-02).
	* configs/lc823450-xgevk: LC823450-XGEVK board support.  From Masayuki
	  Ishikawa (2017-08-02).
	* b-l475e-iot91a:  Add apps/examples/nettest and eamples/udp to Spirit1
	  configuration.  Add telnet support.  fix driver statistics
	  configuration (2017-08-02).
	* Networking: Add support for some packet radio IOCTL commands
	  (2017-08-02).
	* b-l475e-iot01a: crude update to +CONFIG_BOARD_LOOPSPERMSEC.  Not
	  precise but on assertions no flashes at approximately the correct
	  rate (2Hz) (2017-08-02).
	* Fix for stm32f746g-disco board for button support with interrupt.
	  This change is tested with buttons app example and it is working with
	  interrupts (signals). I tried the test with polling but at this point
	  it doesn't work.  From Ivan Ucherdzhiev (2017-08-02).
	* configs/stm32f746g-disco:  Remove inclusion of STM32-specific header
	  files from board.h (2017-08-02).
	* Spirit1 network driver:   Remove extra clear of pending interrupts,
	  could cause missing interrupts.  Fix a deadlock.  Also several other
	  design improvements to eliminate corner cases (2017-08-03).
	* poll: fix poll for regular files and block devices.  Open Group
	  documentation says that poll (and select) support regular files and
	  that 'Regular files shall always poll TRUE for reading and writing'.
	  From Jussi Kivilinna (2017-08-03).
	* mm_mallinfo: do heap end debug assert check with heap semaphore held.
	  From Jussi Kivilinna (2017-08-03).
	* Spirit1 network driver:  Modify reg needs to toggle CS to get the
	  correct status.  Make sprit_unlock an inline function.  Tx timeout
	  should run on the HP work queue (2017-08-03).
	* Simulator:  x86 stack needs to be aligned to 16-byte boundaries
	  (2017-08-04).
	* drivers: handle I2C_TRANSFER return value consistently.  Some I2C
	  peripherals transfers return zero on success, others number of
	  completed transfers.  Make drivers robust against this.  From Juha
	  Niskanen (2017-08-04).
	* syslog: Add option to use the CLOCK_MONOTONIC for time stamping.
	  From Jussi Kivilinna (2017-08-04).
	* RAMTRON: Add support for splitting block writes in chunks.  Some
	  Re-RAMs like MB85AS4MT have a write buffer size limitation.  From
	  Boris Astardzhiev (2017-08-04).
	* Spirit1 network driver:  Correct setting of the length width field;
	  Add multicast and broadcast addresses to radio properties.  Convert
	  network driver to use STack packets vs. Basic packets.  We need to
	  use the STack packets in order to provide the source address
	  (2017-08-04).
	* tools/mkdeps.c:  Eliminate a warning. MAX_PATH may already be defined
	  in included system files.  From Jeff (2017-08-04).
	* Spirit1 network drvier: Increase number of retries if there is no
	  acknowledgement; Add interrupt handling for the case where the max
	  number of retries expires.  Fix some badly implemented queue
	  management code.  With these changes the basic UDP and TCP tests
	  work.  Enable AutoACK, TX retries, and RX timeouts in the network
	  driver (2017-08-04).
	* B-L475E-IOT01A: Make spirit-6lowpan configuration match what is
	  currently under test:  Enable multicast, broadcast, but disable CRC
	  support.  Currently CRCs are not working right (2017-08-04).
	* b-l475e-iot01a:  Add configurations to support a star topology
	  (2017-08-05).
	* Spirit + 6LoWPAN:  In STAR configuration, Spirit must use a
	  configured well known hub address.  6LoWPAN cannot assume that the
	  PAN coordinator is the STAR hub; it must ask the radio to provide it
	  with the address of the star hub (2017-08-05).
	* IEEE 802.15.4 network driver:  Fix more compile issues that only show
	  up when CONFIG_NET_STARPOINT is defined (2017-08-05).
	* STM32F746-Disco:  Add ADC3 support.  From Ivan Ucherdzhiev
	  (2017-08-05).
	* Spirit Network Driver:  Attempts to eliminate RX FIFO errors.  Reduce
	  max packet length to avoid an errata.  Reducing the packet length had
	  no effect on eliminating RX FIFO errors.  Add support for watermark
	  interrupts on RX FIFO.  Restructure threading to reduce locking.
	  Still get a few RX FIFO errors (2017-08-06).
	* STM32F103-Minimum: Add support for SmartFS on Winbond W25 SPI NOR
	  Flash.  From Alan Carvalho de Assis (2017-08-06).
	* MTD: Add driver for Macronix QuadSPI flash memory.  From Simon Piriou
	  (2017-08-06).
	* b-l475e-iot01a: add basic support for external Macronix QuadSPI flash
	  memory.  From Simon Piriou (2017-08-06).
	* Spirit radio:  Dropping packet size to 94 seems to fix problem with
	  CRC failures (2017-08-06).
	* STM32F103-Minimum: (1) Enable CONFIG_MTD_PARTITION in Kconfig if
	  flash partition is enabled and (2) Update the README.txt file with
	  info needed to get SmartFS working.  From Alan Carvalho de Assis
	  (2017-08-06).
	* 6LoWPAN:  When obtaining the radio MAC address from the IP address,
	  handle the special case of broadcast and multicast address
	  (2017-08-06).
	* Networking: Move INET socket interface out of net/sockets to its own
	  directory net/inet (2017-08-06).
	* Spirit network driver:  TX timeout was never being cancelled!  Also
	  reviewed and cleaned up all error handling logic (2017-08-06).
	* sched/: Fix return value in sched_setaffinity().  From Masayuki
	  Ishikawa (2017-08-07).
	* Spirit bugfixes:  Was hanging occasionally because there was no
	  mechanism to restart the poll timer if poll was not performed because
	  Spirit ws busy.  Fixed by not checking if Spirit is busy.  The TX
	  poll can be performed asynchronouly while spirit is busy; any
	  outgoing data will queued until Spirit is ready. Fixed handling of a
	  timeout condition.  Failure to transmition to the TX state would fail
	  (timeout) if in a race condition Spirit already committed to the RX
	  state.  The driver needs to recover the state properly and avoid
	  debug assertions in this event (2017-08-07).
	* STM32 USB:  I'm working on bringing up USB full-speed support on
	  STM32F405.  My board does not include a USB power switch, VBus
	  sensing, over current detection, or ID pin.  This commit add a
	  config STM32_OTGFS_VBUS_ CONTROL which lets us selectively disable
	  VBus sensing and control.  I also sneaked in a change to disable the
	  configgpio call for the ID pin, which is only used in OTG mode which
	  isn't supported yet.  The only pins that need to be initialized
	  should be OTGFS_DP and OTGFS_DM.  These changes let a USB mouse
	  enumerate on my platform if it's plugged in on power-up.  Plugging,
	  unplugging, clicking, or moving the mouse cause NSH to stop
	  responding.  Because I'm using the ramlog, I don't have useful debug
	  messaging yet, so there's a lot more work I have to do to
	  troubleshoot it or get my JTAG debugging set up, but these patches
	  shouldn't hurt anything.  I'm hoping my issue is something simple I
	  overlooked in configuration.  From Jeff (2017-08-07).
	* I discovered while working on the SAMV7 mcan driver that the
	  implementation of the CAN error handling is suboptimal. In the
	  current implementation the many errors are implemented as pending
	  errors.  But those errors are not pending, the errors occurred and
	  are gone directly afterwards. This commit changes the described
	  behavior and simplifies the handling of CAN errors.  From Stefan Kolb
	  (2017-08-07).
	* IPv6:  Remove comparisons to the address with all ones set.  IPv6
	  does not support broadcast addresses and certainly not in that form.
	  Replace with multicast addresses beginning with 0xff02 (2017-08-07).
	* ICMPv6: Support source link-layer address option in RA.  From
	  Masayuki Ishikawa (2017-08-08).
	* libm:  Port gamma() and lgamma() from FreeBSD to NuttX.  From Alan
	  Carvalho de Assis (2017-08-08).
	* B-L475-IOT01A: Enable UDP broadcast test in the spirit-starhub
	  configuration (2017-08-08).
	* Spirit Radio:  Add support for CSMA backoff count reached interrupt
	  (2017-08-08).
	* STM32F4-Discovery:  Add a configuration for testing libc++.  From
	  Alan Carvalho de Assis (2017-08-08).
	* Remove CONFIG_NET_MULTILINK.  This increases code size by a little,
	  but greatly reduces the complexity of the network code (2017-08-08).
	* Networking:  Fix netdev_dev_lladdrsize().  In some configurations, it
	  could return the wrong size for the address of a packet radio
	  (2017-08-08).
	* Fix IPv6 loopback driver that depended on the removed
	  g_ipv6_allonesaddr.  Noted by Masayuki Ishikawa (2017-08-09).
	* Networking: Fix typo for 802.11 devices in netdev_register().  Was
	  being masked before because depended on CONFIG_NET_MULTLINK
	  (2017-08-09).
	* Networking:  Fix a compilation issue with
	  CONFIG_NET_ICMPv6_AUTOCONF=y.  From  Masayuki Ishikawa (2017-08-09).
	* Update NSH documentation to show new usage for addroute and delroute
	  (2017-08-10).
	* cwchar:  Use CONFIG_LIBC_WCHAR to only export the wc/mb functions.
	  When a build does not want to use wide or multibyte char
	  CONFIG_LIBC_WCHAR is not set. Therefore we should to only export the
	  wc/mb functions when defined.  Regardless of the stat of
	  CONFIG_LIBC_WCHAR the non mb/wc  definitions such as mbstate_t,
	  wint_t, wctype_t need to be exported.  From David Sidrane
	  (2017-08-10).
	* inet_ntop:  Was printing negative values for fields >127
	  (2017-08-11).
	* procfs:  Add support for routing tables at proc/net/route
	  (2017-08-11).
	* Unify GCC/Clang config.  From Goran Mekić (2017-08-12).
	* procfs routing table:  Don't print the IPv4 routing table header if
	  the table is empty.  Fix a couple of places where CONFIG_NET_IPv4 was
	  used wehre IPv6 was intended (not noticed now because I am testing
	  with both enabled) (2017-08-12).
	* C++: Compilation with recent C++ compiler needs an overloaded delete
	  operator that includes a size_t size argument (2017-08-12).
	* ARM: The older ARM7 and ARM9 configurations were determining CFLAGS
	  based on the GCC version 4.x.x or not.  That needx to be extended for
	  5.x.x and 6.x.x which also behave like 4.x.x (2017-08-12).
	* STM32F7: Some STM32F7 builds failed in build testing due to undefined
	  STM32_SRAM1_BASE.  I think that is because stm32_allocateheap.c was
	  not including chip/stm32_memorymap.h (2017-08-13).
	* Fix ESP32 gpio enable reg and default UART pin. Modify default uart
	  pin for ESP-WROOM-32. Fix gpio enable reg.  From Sungki Kim
	  (2017-08-13).
	* stm32/stm32f0:  Fix some funny shifts in DAC header files.  From Juha
	  Niskanen (2017-08-14).
	* STM32L4 COMP:  Input minus pin extended selection.  From Juha
	  Niskanen (2017-08-14).
	* STM32L4 DAC:  Port from STM32.  Add ADC register definitions.  Note
	  that this does not address the somewhat confusing relation between
	  STM32L4_NDACS and DAC2 config macros that comes from original STM32
	  code.  From Juha Niskanen (2017-08-14).
	* libxx:  New sized delete operators are only for C++14 and above
	  (2017-08-14).
	* Miscellaneous fixes from astyle tool.  Noted by Arjun Hary
	  (2017-08-14).
	* SAMv71-XULT: Fix MRF24J40 interrupt GPIO number (2017-08-15).
	* Clicker2:  Configure EDBG SPI CS just to make that it is disabled
	  (2017-08-15).
	* STM32L476VG Discovery:  Add a knsh configuration that may be used to
	  test the PROTECTED build mode (2017-08-17).
	* stm32f7:DMA correct comments and document stm32_dmacapable.  Updated
	  comment to proper refernce manual for STM32F7 not STM32F4.  Added
	  stm32_dmacapable input paramaters documentation.  From David Sidrane
	  (2017-08-17).
	* STM32 F7: DMA add dcache alignment check in stm32_dmacapable.  In the
	  case dcache write-buffed mode is used (not write-through) buffer
	  alignment is required for DMA transfers because  a)
	  arch_invalidate_dcache could lose buffered writes data and b)
	  arch_flush_dcache could corrupt adjacent memory if the maddr and the
	  mend+1, the next next address are not on ARMV7M_DCACHE_LINESIZE
	  boundaries.  From David Sidrane (2017-08-17).
	* STM32 F7: SDMMC remove widebus limitation on DMA.  There is no
	  documantation for the STM32F7 that limits DMA on 1 bit vrs 4 bit
	  mode.  From David Sidrane (2017-08-17).
	* dcache write-buffed mode is used (not write-through) buffer alignment
	  is required for DMA transfers because a) arch_invalidate_dcache could
	  lose buffered writes data and b) arch_flush_dcache could corrupt
	  adjacent memory if the buffer and the bufflen, are not on
	  ARMV7M_DCACHE_LINESIZE boundaries.  From David Sidrane (2017-08-17).
	* STM32 F7: SDMMC add dcache alignment check in dma{recv|send}setup.
	  In the case where CONFIG_SDIO_PREFLIGHT is not used.
	* drivers/sensors: Add support to HC-SR04 distance sensor.  From Alan
	  Carvalho de Assis (2017-08-17).
	* PF_IEEE802154 address family:  With this commit PF_IEEE802154 address
	  family is basically functional.  More testing is needed, of course:
	  Finishes up socket interfaces connect() sendto(), recvfrom(), and
	  bind() logic.  Special initialization, device lookup, driver poll,
	  and frame input logic.  Add configs/sim configuration for testing
	  (2017-08-19).
	* STM32 COMP: add default INM configuration and some missing
	  COMP1,3,5,7 code.  From Mateusz Szafoni (2017-08-20).
	* 6LoWPAN/PF_IEEE802154:  Created radiodev.h and renamed various
	  structures to provide a better separation between 6LoWPAN networking
	  and PF_IEEE802154 address family (2017-08-20).
	* STM32 DAC: fix some configuration logic. When STM32_NDAC is greather
	  than 1, then second channel is always DAC1OUT2.  From Mateusz Szafoni
	  (2017-08-20).
	* PF_IEEE802154 address family:  IEEE 802.15.4 network device: Make
	  same changes as per loopback device so that it will build with
	  PF_IEEE802154 but without 6LoWPAN.  More fixes to device registration
	  and to IEEE 802.15.4 loopback driver for PF_IEEE802154 without
	  6LoWPAN.  Changes to conditional compilation so that PF_IEEE802154
	  can build without 6LoWPAN (2017-08-20).
	* drivers/net/tun.c:  Currently cannot support TAP mode unless Ethenet
	  is enabled (2017-08-20).
	* PktRadio loopback driver:  Fix compile problem by removing
	  inappropriate const storage class (2017-08-20).
	* Networking:  Remove driver based backlog support.  This affects the
	  entire network, but is used by only one driver.  The only supported
	  RX backlog is now via common read-ahead buffering (2017-08-21).
	* PF_IEEE802154 socket family:  (1) Improve some backlog counting
	  logic; add more assertions to catch cases where the backlog count
	  might deviate from the actual backlog. (2) Add a maximum backlog
	  option.  This will prevent overrun of the RX frame queue if many
	  frames are received from the radio, but no application is receiving
	  the queued data. (3) On input, there may be a list of frames
	  provided, not just one.  When closed() and connection is freed, also
	  need to free any frames remaining in the RX queue (2017-08-21).
	* Network procfs: Add support for network procfs statistics when
	  nothing is enabled but PF_IEEE802154 (2017-08-21).
	* STM32 DAC:  Add support for HRTIM triggering.  Separate dma buffer
	  configuration for channels.  From Mateusz Szafoni (2017-08-21).
	* ENCX24J600:  Fix some warnings.  Update interface to use newer
	  parameter passing to interrupt handlers (2017-08-21).
	* ENC28J60: Update interface to use newer parameter passing to
	  interrupt handlers (2017-08-21).
	* drivers/analog/comp: add poll support.  From Pekka Ervasti
	  (2017-08-22).
	* STM32L4 COMP:  Bind to upper half comp driver.  From Pekka Ervasti
	  (2017-08-22).
	* STM32L4 ADC: correct EXTSEL macros.  From Juha Niskanen
	  (2017-08-22).
	* drivers/lcd: ssd1306:  (1) Separate lcd_dev_s setup to separate
	  object.  g_oleddev takes 1 KiB because framebuffer and was allocated
	  to .data section because of lcd_dev_s function pointer setup. Move
	  lcd_dev_s setup out, so that g_oleddev goes to .bss and avoid wasting
	  ROM. (2) Fix memory corruption caused by ssd1306_getrun().
	  ssd1306_getrun was writing one extra byte (with value 0) past target
	  buffer when pixlen is multiple of 8. When pixlen was not multiple of
	  8, last byte of buffer was fully cleared, instead of modifying only
	  the (pixlen % 8) bits of last byte.  (3) Add support for board power
	  control.  ThingseeOne has regulator for controlling display power
	  on/off.  Patch adds support for board based power control to SSD1306
	  driver. (4) Add DD-12864WO-4A/SSD1309 support to SSD1306 driver.
	  From Jussi Kivilinna (2017-08-22).
	* Network procfs: procfs/net_procfs_route.c building error occur if
	  CONFIG_NET_ROUTE is enabled.  Fix suggested by Aleksandr Kazantsev
	  (2017-08-22).
	* Networking:  Fix ompile error if Unix domain sockets selected
	  (2017-08-23).
	* STM32L4 TIM: TIM15,16,17 are always in APB2.  From Juha Niskanen
	  (2017-08-25).
	* STM32L4 DAC: report transfer as completed in DMA callback.  Without
	  this even O_NONBLOCK writes block the calling task if DAC was using
	  DMA.  From Juha Niskanen (2017-08-25).
	* STM32L4 COMP: comparators share RCC enable bit with SYSCFG.  From
	  Juha Niskanen (2017-08-25).
	* power: add driver for TI bq2429x battery charger.  TODO: Untested.
	  Does not have poll() support.  From Juha Niskanen (2017-08-25).
	* 6LoWPAN:  The original, Contiki-based design used only a single
	  buffer for reassemblying larger packets.  This could be a problem
	  issue for hub configurations which really need the capability
	  concurrently reassemble multiple incoming streams concurrently.
	  These was also a design issue in that the reassembly buffer could be
	  corrupted by outgoing packets.  The design was extended to support
	  multiple reassembly buffers, each associated with the reassembly tag
	  and source address.  This assures that there can be be no corruption
	  of the reassembly once it has started (2017-08-26).
	* Simulator:  Adds necessary functionality to build Simulator under ARM
	  Linux. Tested only on Raspberry3. Currently setjmp/longjmp do not
	  save/restore floating point registers.  From Nickolay Semyonov
	  (2017-08-26).
	* fs: FS_AUTOMOUNTER should depend on SCHED_LPWORK.  From Nickolay
	  Semyonov (2017-08-26).
	* configs/lc823450-xgevk: Add eMMC/SD and USB support.  From Masayuki
	  Ishikawa (2017-08-27).
	* LC823450: eMMC/SD and USB support for LC823450.  From Masayuki
	  Ishikawa (2017-08-27).
	* drivers/analog/comp.c:  Fix compilation errors when poll disabled.
	  From Mateusz Szafoni (2017-08-27).
	* stm32_dac.c: conditional logic for timer triggering, fix TSEL
	  configuration when HRTIM, DMA request remapping, Add DMA buffers
	  initialization logic.  From Mateusz Szafoni (2017-08-27).
	* STM32 HRTIM: Fix DAC triggers configuration, Add missing master timer
	  logic, enable DAC triggering.  From Mateusz Szafoni (2017-08-27).
	* STM32F33: missing SYSCFG CFGR3 definitions.  From Mateusz Szafoni
	  (2017-08-27).
	* STM32 DAC: support external triggering for DMA transfer.  From
	  Mateusz Szafoni (2017-08-27).
	* ARM: Add support for STM32F433RC.  From Alan Carvalho de Assis
	  (2017-08-27).
	* STM32L4 RCC:  Enable ADC clock source.  From Juha Niskanen
	  (2017-08-28).
	* drivers: analog: adc:  Add poll support.  From Juha Niskanen
	  (2017-08-28).
	* STM32, STM32L4, STM32F7 ADC: fix channel 18 sample time.  Frpm Juha
	  Niskanen (2017-08-28).
	* STM32L4 ADC: implement peripheral.  From Juha Niskanen (2017-08-28).
	* work_queue() must cancel existing work prior to queuing new work,
	  otherwise the work queue list structure can become corrupted.
	  Problem noted by Pascal Speck (2017-08-28).
	* STM32 HRTIM:  Add DMA configuration. From Mateusz Szafoni
	  (2017-08-28).
	* Networking:  Move TCP specific files from inet/ to tcp/.  There is
	  another TCP-specific logic in inet/ that should be moved sometime,
	  but those are more entangled (2017-08-29).
	* Networking:  TCP disconnection callbacks are not retained in a list.
	  This will support mutiple callbacks per lower-level TCP connection
	  structure.  That is necessary for the cae where a socket is dup'ed
	  and shares the same lower-level connection structure.  NOTE:  There
	  still needs to be a call to tcp_start_monitor() when the socket is
	  dup'ed (2017-08-29).
	* Networking:  Start the network monitor for a socket when a TCP socket
	  is dup'ed (2017-08-29).
	* Networking:  A placeholder for some missing logic in the previous
	  change related to monitoring network status for dup'ed sockets.  If
	  one of the dup'ed socket's is closed, then network monitor resources
	  associated with that one socket must be recovered.  Also, in the
	  event that socket is being used on one thread, but then closed on
	  another, any threads waiting for events from the socket should be
	  informed of the closure.  That latter requirement is not implemented
	  because current data structures do not support it (2017-08-29).
	* Networking:  Clean up some naming that has bothered me for a long
	  time... There are no interrupts and no interrupt handlers in the
	  network.  There are events and event handler (there used to to be
	  interrupt logic in there years ago but that is long, long gone)
	  (2017-08-29).
	* configs: update STM32L4 configs for ADC changes.  From Juha Niskanen
	  (2017-08-30).
	* configs: update STM32L4 configs for ADC changes.  From Juha Niskanen
	  (2017-08-30).
	* Porting Guide:  Add usage tip for reading CAN messages from the CAN
	  driver without losing message (2017-08-30).
	* Networking:  socket dup() conditional operation was missing the test
	  for the condition (2017-08-30).
	* ARMv7-M syscall logic:  Clear bit 0 in PC settings.  Bit 0 is the
	  thumb mode indication and should not be set in the PC.  This extra
	  bit has not caused problems in the past, but seeing it set in the PC
	  is unnerving (2017-08-30).
	* Networking:  Fix a race condition.  The accept() operation is
	  performed with the network locked.  However, the network is unlocked
	  BEFORE the connected state is set.  Therefore, a context switch may
	  occur and the socket may no longer be connected when it is marked so.
	  Noted by Pascal Speck (2017-08-31).
	* Work queue:  In a recent change for a problem noted by Pascal Speck,
	  it was noted (again by Pascal Speck) that the cancellation of
	  existing work and replacement with new work must be atomic.  Thanks,
	  Pascal (2017-08-31).
	* LPC43xx: Modify up_allocate_(k)heap() to support PROTECTED mode.
	  From Alan Carvalho de Assis (2017-08-31).
	* STM32 Timer:  Add the set counter function for stm32 timers.  From
	  Sergey Ustinov (2017-08-31).
	* configs/Bambino: Add protected mode configuration to Bambino board.
	  From Alan Carvalho de Assis (2017-08-31).
	* STM32L4 DAC: add option for routing DAC output to ADC.  Actually
	  write something to the DAC DMA buffer.  From Juha Niskanen
	  (2017-08-29).
	* STM32L4 DAC: separate DMA buffer configuration for channels. From
	  Juha Niskanen (2017-08-29).
	* STM32L4 DAC: Fix naming so that DAC1 and DAC2 always refer to
	  channels 1 and 2.  User should not be bothered by details like how
	  many IP blocks there are. As no current STM32L4 has second DAC block
	  (channel 3), remove support for such hypothetical hardware. DMA
	  channels corrected.  From Juha Niskanen (2017-09-01).
	* configs/nucleo-l496zg: add DAC and missing TIM frequencies.  From
	  Juha Niskanen (2017-09-01).
	* Networking: net_timedwait() and net_lockedwait() no longer return
	  errors via errno but returned negated errno values like other
	  internal OS functions (2017-09-01).
	* Networking: Fix net_lock returning ERROR when instead of real error
	  code on failure.  From Jussi Kivilinna (2017-09-01).
	* net/local:  Fix server lc_waitsem overflow.  From Jussi Kivilinna
	  (2017-09-01).
	* drivers/bch:  Add poll support.  From Jussi Kivilinna (2017-09-01).
	* STM32 F7: do not enable read-modify-write on DTCM.  "AN 4667 -
	  STM32F7 Series system architecture and performance" recommends to
	  disable read-modify-write on DTCM: "If the DTCM-RAM is used as data
	  location and the variables used are byte or/and halfword types, since
	  there is no ECC management in this RAM on the STM32F7 Series, it is
	  recommended to disable the read-modify-write of the DTCM-RAM in the
	  DTCM interface (inthe DTCMCR register) to increase the performance."
	  From Jussi Kivilinna (2017-09-01).
	* Networking:  IGMP: Remove special support for interrupt level
	  processing (there is none) and fix some timer cancellation logic.  In
	  many files, correct comments.  There is no interrupt level processing
	  in the networking layer (2017-09-02).
	* stm32_dac.c: fix compilation when DMA disabled for channel.  From
	  Mateusz Szafoni (2017-09-02).
	* Extend the RTC framework with an alarm read ioctl (RTC_RD_ALARM).
	  Through it consumer could get configuration settings about previously
	  scheduled hardware alarms (active status, hours, minutes, seconds).
	  From Boris Astardzhiev (2017-09-03).
	* STM32 F7: Port Boris Astardzhiev's RTC change for STM32L4 to STM32F7
	  (2017-09-03).
	* STM32: Port Boris Astardzhiev's RTC change for STM32L4 to STM32
	  (2017-09-03).
	* Kinetis: Unverified implementation of the alarm read function.
	  Pretty simple because the Kinetis RTC is just a 1Hz counter
	  (2017-09-03).
	* STM32 HRTIM: add burst mode configuration, rename some definitions.
	  From Mateusz Szafoni (2017-09-03).
	* Update net_timedwait() and net_lockedwait() call sites to handle
	  negated errno in return value.  From Jussi Kivilinna (2017-09-04).
	* stm32f7:  Add new configuration option for enabling flash ART
	  Accelerator and flash prefetcher.  From Jussi Kivilinna
	  (2017-09-04).
	* Simulation:  Fix building 32-bit simulation on 32-bit X86.  From
	  Jussi Kivilinna (2017-09-04).
	* waitpid():  Corrects two problems when
	  CONFIG_SCHED_HAVE_PARENT+CONFIG_SCHED_CHILD_STATUS are enabled:  (1)
	  Was erroring out if the waited for task had already exited, and (2)
	  was not freeing resources when a wait was completed.  From Boris
	  Astardzhiev (2017-09-04).

7.23 2017-12-04 Gregory Nutt <gnutt@nuttx.org>

	* STM32L4: ADC, Kconfig small changes:
	    - STM32L4 ADC: port analog watchdog ioctls from the Motorola MDK
	    - STM32L4: Kconfig: add some L486 and L496 chips, remove duplicates
	  From Juha Niskanen (2017-09-06).
	* 6LoWPAN:  Correct an error in uncompressing multicast address
	  (2017-09-08).
	* sem_open() should return SEM_FAILED on any failures.  This is change
	  in the POSIX specification since the original sem_open() was written
	  so many years ago (2017-09-08).
	* STM32: Add logic for enabling wakeup pins.  From Oleg Evseev
	  (2017-09-08).
	* Update/fix last commit:  On some STM32's, the CSR regiser is 18 vs. 16
	  bits wide.  Need to use 32-bit register accesses (2017-09-08).
	* 6LoWPAN: I believe, based on RFC review, that with the last multicast
	  change, the NuttX 6LoWPAN is now compliant with RFC 6282 (2017-09-08).
	* arch/arm/Kconfig:  Add more classic ARM11 architecture selections
	  (2017-09-09).
	* 6LoWPAN/Radio:  Rename radio property sp_pktlen to sp_framelen.  Add
	  6LoWPAN utility to get the max frame length (not yet hooked in)
	  (2017-09-10).
	* 6LoWPAN: Remove the option to disable fragmentation support.  Two
	  reasons:  (1) First fragementation is always required because IPv6
	  requires an MTU of 1280 bytes.  The is no application use case that can
	  work without fragmentation support.  And (2) it greatly reduces the
	  complexity of the code (2017-09-10).
	* net/sixlowpan: Remove CONFIG_NET_6LOWPAN_FRAMELEN.  In this case where
	  multiple radios are supported, this may not be a constant.  6LoWPAN now
	  always queries the driver to get the maximum frame length (2017-09-10).
	* drivers/smps.c: fix error messages.  From Mateusz Szafoni (2017-09-10).
	* configs/stm32f334-disco: beginning of lower half driver for high power
	  LED (powerled).  From Mateusz Szafoni (2017-09-10).
	* Misc STM32 fixes
	    - stm32f33xxx_hrtim.h: fix definition
	    - stm32_hrtim: fix pclk calculation
	    - stm32_hrtim.c: cosmetics
	    - add upper-half driver for high power LED driver (powerled)
	  From Mateusz Szafoni (2017-09-10).
	* drivers/video/fb.c:  Add framebuffer character device (2017-09-11).
	* drivers/video/fb.c:  Add support for LCD drivers that use a simulated
	  framebuffer and must receive explicit notification when there is an
	  update to a region in the framebuffer (2017-09-11).
	* configs/lc823450-xgevk: Enable ADC and watchdog driver.  From Masayuki
	  Ishikawa (2017-09-12).
	* arch/arm/src/lc823450:  Conform to the NuttX coding style, merge the
	  latest fix in lc823450_rtc.c, add ADC driver, add watchdog driver.  From
	  Masayuki Ishikawa (2017-09-12).
	* net/sock: recvfrom:  Fix double leave_cancellation_point on error
	  path.  From Jussi Kivilinna (2017-09-12).
	* net/socket:  Do not enter cancellation point in psock_send() as this
	  is already done in send().  From Jussi Kivilinna (2017-09-12).
	* net/socket: send: verify that sockfd is valid, fixes assert when using
	  send on closed socket.  From Jussi Kivilinna (2017-09-12).
	* drivers/video/fb.c and include/nuttx/video.fb.h:  Some improvements
	  and fixes from early testing sith the sim/fb cnofiguration (2017-09-12).
	* sim/configs/fb:  Add a configuration for non-graphical testing of the
	  frambuffer character driver using apps/example/fb (2017-09-12).
	* Rename CONFIG_VIDEO_DEVICES to CONFIG_DRIVERS_VIDEO to conform better
	  to the evolving configuration naming standard (2017-09-12).
	* Rename CONFIG_AUDIO_DEVICES to CONFIG_DRIVERS_AUDIO to conform better
	  to the evolving configuration naming standard (2017-09-12).
	* stm32:  stm32 alt I2C ensure proper error handling. Injecting data
	  errors would cause the driver to continually reenter the isr with BERR
	  an RxNE.  This fix allows the error to be cleared and propagated to the
	  waiting task.  From David Sidrane (2017-09-12).
	* stm32x i2c fixes, stm32: Fix coding standard error, stm32f7 I2C: fixed
	  typo in comment.  From David Sidrane (2017-09-13).
	* STM32 Tickless: Fixes compilation error when timer info/debug messages
	  are enabled.  From Rajan Gill (2017-09-13).
	* net/: Fix some errors found by Coverity.
	* STM32/STM32 F7:  Fix some errors found by Coverity (2017-09-13).
	* drivers/video/fb.c: File offset is in units of bytes, not pixels
	  (2017-09-14).
	* drivers/lis3dsh.c:  Added the argument parameter (FAR void *arg) to
	  the interrupt handler provided by the LIS3DSH driver to fit the
	  definition for ISRs in xcpt_t.  Changed the check for working queue
	  availability in lis3dsh interrupt handler to use work_available() and
	  not crash in case of an overrun.  From Florian Olbrich (2017-09-14).
	* configs/stm32f4discover: Added initialization code and Kconfig entries
	  to set up the LIS3DSH accelerometer driver on STM32F4Discovery rev. C
	  boards and attach the associated interrupt callback.  From Florian
	  Olbrich (2017-09-14).
	* Added initialization code and Kconfig entries for LIS3DSH
	  accelerometer on STM32F4Discovery + associated changes to LIS3DSH
	  driver.  From Florian Olbrich (2017-09-14).
	* LPC31xx: Change naming of some global variables to match coding
	  standard (2017-09-14).
	* wireless/ieee802154/: Moves MAC802154IOC from ieee802154_ioctl.h and
	  renames ieee802154_ioctl.h to ieee802154_device.h since it only contains
	  types relevant to the MAC char device now.  From Anthony Merlino
	  (2017-09-15).
	* wireless/ieee802154: Adds support for receiving MAC events via IOCTL
	  through socket interface. Other small fixes and cleanup.  From Anthony
	  Merlino (2017-09-15).
	* drivers/wireless:  Adds XBee S2C (802.15.4 firmware) support. XBee
	  driver emulates mac802154 interface.  From Anthony Merlino (2017-09-15).
	* sched/waitpid.c: Eliminate a warning detected by GCC 6 (2017-09-15).
	* drivers/xbee: Fixes a few warnings
	    - drivers/xbee: Fixes a few warnings
	    - configs/clicker2-stm32: Updates sections about i8sak usage in the
	      README
	  From Anthony Merlino (2017-09-15).
	* STM32 Tickless: The attached patch removes the restriction to 16bit
	  counts when a 32bit timer is used for the new tickless on the stm32. As
	  it is now, the restriction is very limiting, especially if one wants
	  high granularity and large achievable intervals and has the hardware
	  (namely the 32bit timers) available.  From Rajan Gill (2017-09-16).
	* configs/open1788:  Initialization now follows the pattern of other
	  boards.  Add initialization of fb driver.  Add a configuration for
	  testing the framebuffer driver (2017-09-16).
	* drivers/video: fb driver now clears framebuffer initially.  Eliminates
	  (or minimizes) initial garbage on the display (2017-09-16).
	* SAMV71-XULT: Add support for fb_driver (2017-09-17).
	* drivers/lcd:  Add suppose for a generic front-end that will convert
	  any LCD driver into a framebuffer driver (2017-09-17).
	* SAMv71-XULT:  Add a configuration to test the LCD framebuffer driver.
	  Not quite yet working properly (2017-09-17).
	* configs/stm3210e-eval:  Rename stm32_appinit.c to stm32_bringup.c so
	  that the start up logic is compatible with other, new boards.  Bring in
	  new stm32_appinit.c, add board_initialize(), add support for FB
	  character driver (2017-09-17).
	* configs/stm3240g-eval:  Rename stm32_appinit.c to stm32_bringup.c to
	  better match other architectures.  Replace the old-style stm32_appinit.c
	  with tne new one from the STM32F4-Discovery.  Add a configuration for
	  testing the FB character driver at drivers/video/fb.c using the LCD
	  frame driver front end at drivers/lcd/lcd_framebuffer.c.  Appears to be
	  fully functional (2017-09-17).
	* netinet/in.h:  Add missing IN6_IS_ADDR_V4COMPAT macro (2017-09-18).
	* configs/stm32f4discovery: Update README.  Add summary of differences
	  with the newest STM32F407G-DISC1 part.  Remove a lot of old discussion
	  that is really no longer helpful (2017-09-18).
	* Networking: sockgetname() files need to include udp/udp.h and
	  tcp/tcp.h or otherwise NET_UDP_HAVE_STACK and NET_TCP_HAVE_STACK are
	  undefined and the logic is never compiled.  Noted by Anthony Merlino
	  (2017-09-18).
	* Add driver for APA102 LED controller.  These LEDs are used on LED
	  Strips and are controlled over SPI (2017-09-18).
	* configs/stm32f103-minimum: Add board support for APA102 driver.  From
	  Alan Carvalho de Assis (2017-09-18).
	* sched/env_dup.c:  Fix an error in the duplication of the child tasks
	  environment in the special case where the parent's environment was
	  created, but then all of the variables were unset.  In that case, there
	  is still an allocation in place but the size of the allocation is zero.
	  This case was not being handled correctly when a child task attempts to
	  create its environment and inherit the zero-size partent environment.
	  Noted by Anthony Merlino (2017-09-18).
	* STM32L4 DFSDM: add peripheral, DAC, TIM: small changes
	    - STM32L4 DAC: do not configure output pin if it is not used
	    - STM32L4 TIM: fix compilation of timers with complementary outputs
	      when not PWM_MULTICHAN
	    - STM32L4 DFSDM: peripheral for digital filters for sigma-delta ADCs
	  Initial version. Timer trigger support is not completed and there is
	  some issue with DMA.
	  From Juha Niskanen (2017-09-19).
	* stm3240g-eval: Remove some bad conditional compilation (2017-09-19).
	* Networking: IPv4 getsockname(): Fix a typo that can cause a compile
	  error (2017-09-19).
	* viewtool-stm32f107: Enable NSH arch-specific initialization.  Rename
	  stm32_appinit.c to stm32_bringup.c for consistency with other boards.
	  Replace old stm32_appinit.c (now stm32_bringup.c) with 'standard'
	  stm32_appinit.c from the STM32F4-Discovery.  Add CONFIG_BOARD_INITIALIZE
	  logic to stm32_boot.c.  Add support to auto-mount the procfs file system
	  (2017-09-19).
	* Networking:  Add implementation of logic for SIOCGIFCONF and
	  SIOCGLIFCOF IOCTL commnds (2017-09-19).
	* Networking: drivers/net/loopback.c: Eliminate a warning.
	  net/netdev/netdev_ifconfig.c: Was not returning all of the address info
	  (2017-09-19).
	* STM32L4 ADC, DFSDM: add routing of ADC data to DFSDM filters.   From
	  Juha Niskanen
	    - configs/nucleo-l496zg: add DFSDM initialization
	    - STM32L4 ADC: add option for routing ADC data to DFSDM, fix DFSDM
	      DMA (2017-09-20).
	* SIOCGIFCONF and SIOCGLIFCONF IOCTL commands should only report on
	  network adatpors in the UP state (2017-09-20).
	* In some cases, packets are still not sent behind the router. I found
	  that NuttX sends the ARP requests not to the router but to the target.
	  Mistake in file net/route/netdev_router.c.  From Aleksandr Kazantsev
	  (2017-09-20).
	* stm32: stm32f40xxx I2C ensure proper isr handling.  Injecting data
	  errors that causes a STOP to be perceived by the driver, will
	  continually re-enter the isr with SB not set and BTF
	  and RxNE set.  This changes allows the interrupts to be cleared and
	  propagates a I2C_SR1_TIMEOUT to the waiting task.  From David Sidrane
	  (2017-09-21).
	* include/nuttx/net/net.h:  Add missing semicolon in prototype.  Fixes
	  error in certain combinations of configuration options.  From Pavel Pisa
	  (2017-09-21).
	* drivers/pipes: pipe_common:  Fix writing large buffers not triggering
	  POLLIN for reader poll.  From Jussi Kivilinna (2017-09-21).
	* drivers/usbdev:  Add support for RX flow control to the CDC/ACM driver
	  (2017-09-22).
	* STM32 Serial:  Fix some incorrect conditional compilation (2017-09-23).
	* drivers/usbdev:  Add support for flow control TERMIOs in CDC/ACM
	  driver (2017-09-23).
	* drivers/usbdev:  CDC/ACM should reset all 'irregular' notifications to
	  zero after sending the SerialState packet (2017-09-23).
	* drivers/usbdev:  Fix some bad conditional logic (2017-09-23).
	* Fixes several errors preventing icmpv6_radvertise.c from being
	  compiled. Fixes conversions to network byte order (namely vlifetime,
	  plifetime, mtu).  IPv6 source address is set to link-local IP address
	  instead of the address in the netdev structure. This is in compliance to
	  RFC 4861. RA didn't work on Linux before this change.  Finally, router
	  prefix and prefix length are derived from the IPv6 address and netmask
	  in the netdev structure. This seems to make more sense than using a
	  predefined, separate prefix from the config.  From Sakari Kapanen
	  (2017-09-24).
	* drivers/usbdev/usbdev: Add RNDIS-over-USB driver.  From Sakari Kapanen
	  (2017-09-24).
	* net/igmp/igmp_send.c:  Fix incoming IGMP checksum calculation.  From
	  Louis Mayencourt (2017-09-25).
	* Fixes for problems found by Coverity in the nuttx repository:
	    - net/socket/recvfrom.c: Check fromlen integrity before using it.
	    - net/socket/net_sockets.c: Always check for valid psock before using.
	    - net/tcp/tcp_send_unbuffered.c:  Avoid using psock beforing
	      checking its integrity.
	    - sched/timer/timer_create.c: Fix watchdog resource leak if cannot
	      allocate a new timer.
	  From Bruno Herrera (2017-09-25).
	* drivers/usbdev/Kconfig: Add comments in regard to RNDIS selection
	  (2017-09-25).
	* configs/nucleo-f410rb:  Add support for the nucleo-F410RB board.  From
	  Gwenhael Goavec-Merou (2017-09-25).
	* STM32 L4: Add SDMMC driver.  From Miha Vrhovnik (2017-09-26).
	* Nucleo-L496ZG: Add support for SDMMC driver.  From Miha Vrhovnik
	  (2017-09-26).
	* drivers/usbdev/cdcacm.c: Avoid using priv before checking its
	  validity.  From Juha Niskanen (2017-09-26).
	* drivers/usbdev/cdcacm.c:  Change design for queuing RX packets that
	  cannot be processed.  Previous design had a logic problem that could
	  cause data loss (2017-09-26).
	* drivers/usbdev/cdcacm.c:  Add a failsafe time to assure that the RX
	  pending queue cannot stall indefinitely.  I can imagine a corner case
	  where the serial driver's RX buffer is full and it stops accepting data
	  and where all of the read requests are queued and there is not event to
	  restart RX processing.  I am not sure that that scenario can really
	  happen, but the failsafe timer gives me peace of mind (2017-09-26).
	* Build break fix: define PWM_TIM2_CH1CFG for channel 1 PWM.  From
	  Tomasz Wozniak (2017-09-26).
	* Fixed directory unlocking in tmpfs_opendir.   From Dmitriy Linikov
	  (2017-09-27).
	* drivers/usbdev/cdcacm.c:  Add some missing logic when flow control is
	  disabled.  Also make sure that the flowcontrol and rxint can handle
	  being re-entered when cdcacm_release_rxpending() is called (2017-09-27).
	* drivers/usbdev/cdcacm.c:  Fix confusion between flow control being
	  enabled and being active.  Different things (2017-09-27).
	* drivers/usbdev/cdcacm.c:  Change ordering of some operations to avoid
	  races; Add missing uppder watermark logic that is normally in
	  serial_io.c but must be duplicated in cdcacm.c (2017-09-27).
	* net/route: Permit IPv4 and IPv6 routing tables to be of different
	  sizes (2017-09-27).
	* ROMFS for STM32F4 Discovery board.  From Tomasz Wozniak (2017-09-28).
	* STM32 PWR:  Adds stm32_pwr_getsbf and stm32_pwr_getwuf functions that
	  return the standby flag and the wakeup flag PWR power control/status
	  register.  From Oleg Evseev (2017-09-28).
	* net/arp/arp_out.c:  Fix IGMP Ethernet address computation.  From Louis
	  Mayencourt (2017-09-28).
	* net/route:  Adds support for read-only routing tables.  Prior to this
	  change, routing tables were only support in RAM and had to be
	  initialized with explicit logic to add the necessary routes to the
	  routing table.  With this change, routes may be defined in the
	  pre-initialized, read-only routing table provided by the board-specific
	  logic

	  This would be particularly useful, for example, in the case where
	  there is only a single network adaptor and you want all output packets
	  to go to the single adaptor in all cases.  So for that behavior you
	  could add a read-only routing table to the board-specific long that
	  contains a single entry, the default route: 0.0.0.0/0 (2017-09-28).
	* fs/vfs:  file_seek() is an internal OS interface and should not errors
	  via the errno (2017-09-28).
	* fs/vfs:  file_read() is an internal OS interface and should not errors
	  via the errno (2017-09-28).
	* fs/vfs:  file_write() and file_pwrite() are internal OS interfaces and
	  should not report errors via the errno (2017-09-28).
	* STM32L4 FLASH, DFSDM: option bytes, JEXTSEL bits, ADC1 output to DFSDM
	  chips change
	    - STM32L4 FLASH: add function for modifying device option bytes
	    - STM32L4 DFSDM: add JEXTSEL bits, ADC1 output to DFSDM chips change
	  ST's documentation hints that ADC output can be routed to DFSDM on
	  some STM32L4X3 chips, but I got confirmation from tech support that
	  this is just a documentation error so remove this from Kconfig
	  From Juha Niskanen (2017-09-29).
	* This commit adds support for routing tables in files in a file
	  system.  This might be useful for customized, per-unit routing tables.
	  There are two issues with it however:
	    1. Reading from file system on a per packet basis could be slow.  I
	      think it probably should have a small, in-memory cache of most
	      frequently used routes for good problem.
	    2. Currently the delroute logic is disabled due to a problem with
	      the design.  NuttX does not currently support truncate().
	      Therefore, it is not possible to delete entries from the routing
	      table file.
	  In this current implementation, that leaves the last entry intact at
	  the end of the file.  An alternative design might include a tag on
	  each record to indicate if the record is valid or not.  That would
	  work but would add complexity to the other routing table functions
	  (2017-09-29).
	* net/route:  Add support for an in-memory routing table cache in order
	  to improve performance when the routing table is retained in a file.
	  The cache holds the most recently used routing table entries and so can
	  eliminate some file access.  Flush the in-memory cache when any entry is
	  deleted from the routing table.  When a router matching an IP address is
	  found, add the routing table entry to the cache (2017-09-29).
	* fs/vfs:  null check for path on open and buf on write.  Null path
	  check is depend on CONFIG_DEBUG_FEATURES and CONFIG_DEBUG_ASSERTIONS,
	  added null checking so it's always performed Added null checking on buf
	  for write().  From Xiao Qin (2017-09-29).
	* net/route:  File read/write logic should be able to handle short reads
	  and writes (2017-09-29).
	* drivers/syslog:  syslog internal functions should not set the errno
	  variable:  ramlog_putc(), syslog_dev_putc(), syslog_dev_write(),
	  syslog_force() (2017-09-29).
	* net/sockets:  psock_sendto() is an internal OS interface an should not
	  set the errno variable (2017-09-29).
	* net/sockets:  psock_send() is an internal OS interface an should not
	  set the errno variable (2017-09-29).
	* psock_send() no longer sets errno, so send() must now set it
	  (2017-09-30).
	* net/: Versions of psock_send() and pock_sendto() should not set
	  errno.  That is taken care of at a higher level in the send()/sendto()
	  implementation as appropriate (2017-09-30).
	* net/: psock_accept() is an internal interface and should not set the
	  errno (2017-09-30).
	* net/: psock_bind() is an internal interface and should not set the
	  errno (2017-09-30).
	* net/: psock_connect() is an internal interface and should not set the
	  errno nor should it be a cancellation point (2017-09-30).
	* net/: psock_listen() is an internal interface and should not set the
	  errno (2017-09-30).
	* net/: psock_getsockopt() is an internal interface and should not set
	  the errno (2017-09-30).
	* net/: psock_getsockopt() and psock_socket() are an internal interfaces
	  and should not set the errno (2017-09-30).
	* net/: psock_accept() is not a cancellation point (2017-09-30).
	* net/: psock_recvfrom() is an internal interface and should not set the
	  errno nor should it be a cancellation point (2017-09-30).
	* net/ and fs/: net_vfcntl(), file_fcntl(), file_dup(), and file_dup2()
	  are all internal OS interfaces and should not modify the errno value
	  (2017-09-30).
	* net_dupsd() and net_dupsd2() are internal OS functions and should not
	  set the errno variable (2017-09-30).
	* psock_ioctl() and netdev_ioctl() are internal OS functions and should
	  not set the errno variable (2017-09-30).
	* psock_close() and net_close() are internal OS functions and should not
	  set the errno variable (2017-09-30).
	* SAMv7, STM32, STM32 L4:  DAC and ADC drivers are not permitted to set
	  the errno (2017-09-30).
	* SIM LPC31xx:  Serial and console drivers are not permitted to set the
	  errno (2017-09-30).
	* STM32, STM32 F7:  LTDC and DMA2D drivers are not permitted to set the
	  errno (2017-09-30).
	* drivers/serial: 16550 UART driver IOCTL method must not set errno; it
	  must return a negated errno value (2017-09-30).
	* drivers/lcd: ILI9341 initialize method not permitted to set errno
	  (2017-09-30).
	* drivers/sensors:  LIS331DL driver not permitted to set errno
	  (2017-09-30).
	* drivers/wireless:  CC1101 driver not permitted to set errno
	  (2017-09-30).
	* configs/z80sim and xtrs:  Serial driver lower halfs ioctl methods
	  should return a negated errno value, not set the errno variable
	  (2017-10-30).
	* compiler.h, limits.h, types.h:  Update SDCC/z80 files to include
	  support for long long, inline, __FILE__, and __func__ (2017-10-01).
	* z80 Make.defs:  Fixes dependency generation with newest SDCC compiler
	  (2017-10-01).
	* include/:  Add stdnoreturn.h (2017-10-01).
	* tools/configure.sh: Add special support so that you can start with a
	  windows native configuration and install on a different host (and vice
	  versa). (2017-10-01).
	* stm32_hrtim: add support for capture, chopper, deadtime and dump
	  registers.  From Mateusz Szafoni (2017-10-01).
	* tools/configure.c:  Duplicate new functionaity added to configure.sh
	  (2017-10-01).
	* tools/configure.sh:  Another fix for the script.  The last change only
	  worked for Windows Cygwin; for Linux, it needed to remove some
	  additional things from the defconfig file (2017-10-01).
	* configs/z80sim: convert other configurations to default to Linux
	  (2017-10-01).
	* tools/:  configure.sh and configure.c should redirect stdout to
	  /dev/null but should not suppress stderr output (2017-10-01).
	* stdnoreturn.h:  Add definitions for the C11 noreturn keyword.  Also
	  Remove C++11 dependency.  Applies to C too (2017-10-02).
	* net/route:  Add logic to mark a route as most-recently-used in the
	  route cache (2017-10-02).
	* commit b2ea300b6fb7672cdb682a0957b5dd2cff63804d broke the STM32L4 port
	  for people not using the L496xx or L4A6xx.  That was because
	  stm32l4_sdmmc.h is included from the stm32l4.h global header, and this
	  header fires an #error for other chips.  I see that ALL stm32l4 have the
	  same SDMMC except the stm32l4x2, which has none.  From Sebastien Lorquet
	  (2017-10-02).
	* net/route:  Fix an error in cache list management (2017-10-02).
	* Add support for Micron MT25Q series MT25Q128.  From Sebastien Lorquet
	  (2017-10-02).
	* binfmt/:  Don't schedule starthook if there are no constructors
	  (2017-10-02).
	* binfmt/: exec_module(), load_module(), unload_module(), and
	  schedule_unload() are internal OS functions and must not alter the errno
	  variable (2017-10-02).
	* stm32f103-minimum: Add ADC support on stm32f103-minimum board.  From
	  Alan Carvalho de Assis (2017-10-02).
	* syscall/:  The non-standard interface exec() is now enshrined as a
	  official NuttX API.  I really dislike doing this but I think that this
	  is probably the only want to load programs in the protected mode.  It is
	  currently used by some example code under apps/ that generate their own
	  symbol tables for linking.  Other file execution APIs relay on a symbol
	  table provided by the OS.  In the protected mode, the OS cannot provide
	  any meaning symbol table for execution of code in the user-space blob so
	  that is they exec() is really needed in that build case.  And, finally,
	  the interface is completely useless and will not be supported in the
	  KERNEL build mode where the contrary is true:  An application process
	  cannot provide any meaning symbolic information for use in linking a
	  different process (2017-10-03).
	* STM32L4 RTC, PM: small fixes to subseconds handling, ADC
	  power-management hooks
	    - STM32L4 ADC: add PM hooks from Motorola MDK
	    - STM32L4 RTC: add up_rtc_getdatetime_with_subseconds
	    - STM32 RTC: workaround for potential subseconds race condition.  In
	      all recent STM32 chips reading either RTC_SSR or RTC_TR is supposed
	      to lock the values in the higher-order calendar shadow registers
	      until RTC_DR is read. However many old chips have in their errata
	      this silicon bug (at least F401xB/C, F42xx, F43xx, L15xxE, L15xVD
	      and likely others):  "When reading the calendar registers with
	      BYPSHAD=0, the RTC_TR and RTC_DR registers may not be locked after
	      reading the RTC_SSR register. This happens if the read operation is
	      initiated one APB clock period before the shadow registers are
	      updated. This can result in a non-consistency of the three
	      registers. Similarly, RTC_DR register can be updated after reading
	      the RTC_TR register instead of being locked."
	    - STM32L4 RTC: correct RTC_SSR and RTC_TR read ordering.  In all
	      recent STM32 chips reading either RTC_SSR or RTC_TR is supposed to
	      lock the values in the higher-order calendar shadow registers until
	      RTC_DR is read. Change the register read ordering to match this and
	      don't keep a workaround for a hypothetical race condition (not in
	      any L4 errata, lets for once assume ST's silicon works as it is
	      documented...)
	    - STM32L4 PM: remove useless #ifdefs and old non-L4 STM32 code
	  From Juha Niskanen (2017-10-03).
	* sched/semaphore:  Rename sem_reset() to nxsem_reset() so that it is
	  clear this is an internal OS function (2017-10-03).
	* sched/semaphore:  Rename sem_tickwait() to nxsem_tickwait() so that it
	  is clear this is an internal OS function (2017-10-03).
	* libc/semaphore:  Add nxsem_init() which is identical to sem_init()
	  except that it never modifies the errno variable.  Changed all
	  references to sem_init in the OS to nxsem_init() (2017-10-03).
	* sched/semaphore:  Rename all internal private functions from sem_xyz
	  to nxsem_xyz.  The sem_ prefix is (will be) reserved only for the
	  application semaphore interfaces (2017-10-03).
	* libc/semaphore:  Add nxsem_getvalue() which is identical to
	  sem_getvalue() except that it never modifies the errno variable.
	  Changed all references to sem_getvalue in the OS to nxsem_getvalue()
	  (2017-10-03).
	* libc/semaphore and sched/semaphore:  Add nxsem_getprotocol() and
	  nxsem_setprotocola which are identical to sem_getprotocol() and
	  set_setprotocol() except that they never modifies the errno variable.
	  Changed all references to sem_setprotocol in the OS to
	  nxsem_setprotocol().  sem_getprotocol() was not used in the OS
	  (2017-10-03).
	* sched/semaphore:  Add nxsem_destroy() which is identical to
	  sem_destroy() except that it never modifies the errno variable.  Changed
	  all references to sem_destroy() in the OS to nxsem_destroy() (2017-10-03).
	* sched/semaphore:  Add nxsem_post() which is identical to sem_post()
	  except that it never modifies the errno variable.  Changed all
	  references to sem_post in the OS to nxsem_post() (2017-10-03).
	* sched/semaphore:  Add the function nxsem_wait().  This is a new
	  internal OS interface.  It is functionally equivalent to sem_wait()
	  except that (1) it is not a cancellation point, and (2) it does not set
	  the per-thread errno value on return.  In all OS functions (not
	  libraries), change sem_wait() to nxsem_wait().  This will prevent the OS
	  from creating bogus cancellation points and from modifying the per-task
	  errno variable.  This commit also backs out most of commit
	  b4747286b19d3b15193b2a5e8a0fe48fa0a8638c.  That change was added because
	  sem_wait() would sometimes cause cancellation points inappropriately.
	  But with these recent changes, nxsem_wait() is used instead and it is
	  not a cancellation point (2017-10-04).
	* sched/semaphore:  sem_timedwait() is a cancellation point and, hence,
	  cannot be called from within the OS.  Created nxsem_timedwait() that is
	  equivalent but does not modify the errno and does not cause
	  cancellation.  All calls to sem_timedwait() change to calls to
	  nxsem_timedwait() in the OS (2017-10-05).
	* sched/semaphore:  sem_trywait() modifies the errno value and, hence,
	  should not be used within the OS.  Use nxsem_trywait() instead
	  (2017-10-05).
	* This change renames all internal, private NuttX signal-related
	  functions to use the prefix nxsig_ so that they cannot be confused with
	  application interfaces that begin, primarily, with sig_.  This is
	  analogous to similar renaming that was done previously for semaphores
	  (2017-10-05).
	* drivers/input/cypress_mbr3108:  Add missing variable for nxsem_wait
	  return value.  From Jussi Kivilinna (2017-10-06).
	* fs/vfs and net/socket:  fcntl() is not return success fail for
	  F_SETFL.  Reported by Jussi Kivilinna (2017-10-06).
	* This commit adds internal versions of the signal interfaces:
	    - sigtimedwait() -> nxsig_timedwait()
	    - sigwaitinfo()  -> nxsig_waitinfo()
	    - nanosleep()    -> nxsig_nanosleep()
	  Replace all usage of sigwaitinfo(), sigtimedwait(), and nanosleep()
	  with the OS internal counterparts nxsig_waitinfo(), nxsig_timedwait(),
	  and nxsig_nanosleep().  The internal OS versions differ from the
	  standard application interfaces in that they do not create
	  cancellation points and they do not modify the application's errno
	  variable (2017-10-06).
	* Adds new OS internal functions nxsig_sleep() and nxsig_usleep.  These
	  differ from the standard sleep() and usleep() in that (1) they don't
	  cause cancellation points, and (2) don't set the errno variable (if
	  applicable).  All calls to sleep() and usleep() changed to calls to
	  nxsig_sleep() and nxsig_usleep() (2017-10-06).
	* drivers/serial/tcdrain:  tcdrain() was recently added to the NuttX C
	  library.  But there is a problem.  The specification of tcdrain()
	  requires that it be a cancellation point.  In order to do this, tcdrain
	  was moved from the C library into the OS and the addition cancellation
	  point hooks were added.  In non-FLAT builds, access via system calls is
	  also now supported (2017-10-06).
	* net/Kconfig: Remove improper use of comma in syntax (2017-10-06).
	* mm/: Heap semaphore logic needs to use nxsem_* interfaces when
	  available, but the standard semaphores only when implementing a
	  user-space heap.  Not this does introduce and issue:  the memory
	  management functions them become cancellation points because of the use
	  of sem_wait (2017-10-07).
	* syscall/: Fix some backward conditional compilation (2017-10-07).
	* sched/signal:  Add nxsig_kill() which is functionally equivalent to
	  kill() except that it does not modify the errno variable.  Replace all
	  usage kill() in the OS proper with nxsig_kill() (2017-10-07).
	* graphics/vnc/server:  Fix an error in the VNC server introduced with
	  recent big set of changes (2017-10-07).
	* sched/signal:  Add nxsig_queue() which is functionally equivalent to
	  sigqueue() except that it does not modify the errno variable.  Replace
	  all calls to sigqueue() in the OS proper with calls to nxsig_queue() to
	  avoid accessing the errno variable (2017-10-07).
	* sched/signal:  Add internal OS interface nxsig_procmask().  This
	  internal interface is equivalent to the standard sigprocmask() used by
	  applications except that it does not modify the errno value.  Also fixes
	  a problem in that the original sigprocmask() was not setting the errno.
	  Replace all calls to sigprocmask() in the OS proper with calls to
	  nxsig_procmask(). (2017-10-07).
	* sama5d4-ek:  Remove a really old defconfig example file that is so far
	  out of date that it can only be misleading (2017-10-07).
	* Fix some build problems after recent separation of internal OS from
	  application interfaces.  The build problem only occurs in the PROTECTED
	  and KERNEL builds where separate libraries are built for the
	  applications and for use within the OS. In these cases, the correct
	  interfaces must be used.  This commit fixes a few of these, so I can get
	  through build testing, but there are many more that need fixin'
	  (2017-10-08).
	* SDCC Fixes:  Change some prototypes and some assumptions about the
	  size of unsigned int to get to a clean SDCC compile (2017-10-08).
	* Fix some problems in the previous commits:  Forgot to update sigset()
	  after change to prototype.  Also there was a stray semicolon in the
	  change signal() (2017-10-08).
	* libc/stdio:  Build the lib_noflush() and lib_snoflush() stubs even if
	  CONFIG_FILE_DESCRIPTORS=0.  They may still be needed (2017-10-08).
	* configs/z80sim: Fix a naming problem.  Also, don't try to build the
	  serial driver if CONFIG_NFILE_DESCRIPTOR=0 (2017-10-08).
	*  libc and libnx:  When the libraries are built into two libraries, a
	  user space library and a OS space library (as in the PROTECTED and
	  KERNEL build).  Then the user space library must not use the OS internal
	  interfaces; similarly, the OS must avoid using the userspace interfaces
	  so that it does not muck the errno value or create spurious cancellation
	  points (2017-10-08).
	* Misc STM32 Fixes
	    - stm32_hrtim.c: fix burst mode prescaler update
	    - stm32f334-disco: add flash mode support for powerled driver +
	      cosmetics
	  From Mateusz Szafoni (2017-10-08).
	* powerled.h:  Add fault field to state structure.  From Mateusz Szafoni
	  (2017-10-08).
	* libc/termios:  Adds tcflow() (2017-10-09).
	* RNDIS: Use CONFIG_USBDEV_MAXPOWER instead of hardcoded value.  Use
	  LPWORK for network operations by default.  From Sakari Kapanen
	  (2017-10-09).
	* sched/mqueue:  Rename all OS internal functions declared in
	  sched/mqueue/mqueue.h to begin with nxmq_ vs. mq_.  The mq_ prefix is
	  reserved for standard application interfaces.  Rename all private static
	  functions for use the nxmq_ vs. mq_ naming (2017-10-09).
	* task:  Add new cancellation point interface,
	  check_cancellation_point() (2017-10-09).
	* STM32, STM32L4 serial changes:
	    - stm32: serial: add interface to get uart_dev_t by USART number,
	      stm32_serial_get_uart
	    - stm32: serial: do not stop processing input in SW flow-control mode
	    - stm32l4: serial: do not stop processing input in SW flow-control
	      mode
	    - stm32l4: serial: suspend serial for Stop mode
	  From Juha Niskanen (2017-10-09).
	* Misc STM32 Fixes
	    - stm32_powerled.c: cosmetics
	    - stm32_hrtim.c: cosmetics
	    - stm32/Kconfig: add HRTIM configuration and add DAC external
	      trigger configuration
	    - stm32f334-disco: Add powerled example configuration.  From Mateusz
	      Szafoni (2017-10-09).
	* drivers/power: Add powerled to Kconfig.  From Mateusz Szafoni
	  (2017-10-09).
	* BCM2708:  Add enough infrastructrue (more stubs) to get a clean
	  compilation of the Pi Zero configuration (with many undefined things at
	  link time).   This includes several register definition header files
	  (some from Alan Carvalho de Assis), basic interrupt handling logic,
	  boot-up files, GPIO support, build and configuration logic, basic board
	  support at configs/pizero (2017-10-09).
	* sched/mqueue:  Add internal function nxmq_send() and nxmq_timedsend()
	  that are equivalent to mq_send() and mq_timedsend() except that they do
	  not create cancellation points and do to not modify the errno variable.
	  Change all calls to mq_send() and mq_timedsend() in the OS to calls to
	  nxmq_send() and nxmq_timedsend(), making appropriate changes for
	  differences in return values (2017-10-10).
	* sched/mqueue:  Add nxmq_receive() and mxmq_timedreceive() which are
	  functionally equivalent to the standard mq_receive and mq_timedreceive()
	  except that (1) they do not create cancellation points, and (2) the do
	  not modify the application's errno variable.  Change all calls to
	  mq_receive() and mq_timedreceive() in the OS to calls to nxmq_receive()
	  and nxmq_timedreceive(), making appropriate changes for differences in
	  return values (2017-10-10).
	* Fix a few places where there was a semicolon following the 'if'
	  condition, making the following logic unconditional (2017-10-10).
	* The INA219 is a combined voltage and current sensor that can measure
	  up to 26 volts and a current that depends on an external shunt
	  resistor.  Connection happens via i2c/smbus and the chip features a
	  power supply rail that is independent from the measured voltage, so it
	  can measure low voltages.

	  This commit adds a driver for this chip.  Right now it measures bus
	  voltage and current, and does not use the internal calibrated current
	  reading, nor the available power measurement.  From Sebastien Lorquet
	  (2017-10-10).
	* configs/clicker2-stm32: Adds SD card, automount, and syslog file
	  support and fixes a few minor issues
	    - Moves defines for xbee from clicker2-stm32.h to stm32_xbee.h
	    - Adds support for uSD click boards and automount support
	    - Fixes minor guard clause
	    - Bring-up automounter before MMCSD
	    - MRF24J40 interrupt should only fire on falling edge.
	    - Adds file syslog support for logging to file on SD card
	  From Anthony Merlino (2017-10-11).
	* Z80:  Makefile fix for use with current SDCC (2017-10-11).
	* fs/vfs:  Change the return value of internal function fs_getfilep().
	  It no longer sets the errno variable but, rather, returns errors in the
	  same manner as other internal OS functions (2017-10-11).
	* Adds OS internal functions nx_send(), ns_recv(), and nx_recvfrom()
	  which are functionally equivalent to send(), recv(), and recvfrom()
	  except that they do not set the errno variable and do not cause
	  cancellation points (2017-10-11).
	* Adds OS internal function nx_write() which is functionally equivalent
	  to write() except that it does not set the errno variable and do not
	  cause cancellation points (2017-10-11).
	* sched/task:  task_exithook.c fails to link if signals are disabled
	  because was unconditionally trying to send the SIGCHLD signal to the
	  parent in certain configurations.  Noted by Jeongchan Kim (2017-10-11).
	* arch/arm/src/samv7:  Correct an error in RX DMA setup.  From Manish
	  Kumar Sharma (2017-10-11).
	* net/socket: psock_send/psock_sendto: remove assert check for null
	  psock and buf input pointers.  Removes check as 'psock == NULL'
	  altogether because that checked for later in psock_send and
	  psock_sendto. Change null check for 'buf' so that it is handled same as
	  in recvfrom.c (return -EINVAL instead of assert).  From Jussi Kivilinna
	  (2017-10-11).
	* fs/vfs:  Add new internal OS interface nx_read().  nx_read() is
	  functionally equivalent to read() except that it does not modify the
	  errno variable and it is not a cancellation point.  Changed all
	  references to read() in the OS to nx_read() (2017-10-11).
	* sched/signal:  Add logic to wake up a thread that is waiting on a
	  signal if it is canceled (2017-10-12).
	* nxsig_timedwait: Add logic to suppress the wait if there is a pending
	  cancellation (2017-10-12).
	* stm32 SPI: Add missing include required when CONFIG_SPI_CALLBACK is
	  enabled.  From Anthony Merlino (2017-10-12).
	* STM32L4 RTC fixes:
	    - STM32L4 RTC: init mode was never exited because nested locking in
	      rtc_synchwait() disabled backup domain access
	    - STM32L4 RTC:  Use backup register magic value instead of INITS
	      bit.  The INITS (bit 4) of RTC_ISR register cannot be used to
	      reliably detect backup domain reset. This is because we can operate
	      our device without ever initializing the year field in the RTC
	      calendar if our application does not care about correct date being
	      set.  Hardware also clears the bit when RTC date is set back to year
	      2000.
	    - STM32L4 RTC: put back the SSR race condition workaround.  ST has
	      confirmed that the issue has not been fixed, and that it applies to
	      STM32L4 too (was not in errata sheets due to documentation bug) See
	      discussion:        https://community.st.com/thread/43710-issue-with-rtc-maximum-time-resolution
	    - STM32F4, STM32L4, STM32F7 RTC: add more CONFIG_RTC_NALARMS > 1 to
	      reduce code size
	    - STM32L4: rename stm32l4_rtcc.c to stm32l4_rtc.c to better match
	      STM32F7
	    - STM32, STM32L4, STM32F7 RTC: stray comment and typos in
	      chip/stm32_rtcc.h
	    - STM32L4 RTC: change maximum alarm time from 24h to one month
	  From Juha Niskanen (2017-10-13).
	* TCP Networking:  When CONFIG_NET_TCP_WRITE_BUFF=y there is a situation
	  where a NULL pointer may be dereferenced.  In this configuration, the
	  TCP connection's 'semi-permanent' callback, s_sndcb was nullified in
	  tcp_close_disconnect.  However, other logic in tcp_lost_connection()
	  attempt to use that callback reference after it was nullifed.  Fixed in
	  tcp_lost_connectino() by adding a NULL pointer change before the
	  access.  This was reported by Dmitriy Linikov in Bitbucket Issue 72
	  (2017-10-13).
	* stm32f7 BBSRAM: stm32_bbsram: avoid assert in stm32_bbsram_savepanic.
	  If panic happens before stm32_bbsram is initialized,
	  stm32_bbsram_savepanic caused additional assert panic. Function has null
	  pointer check, so drop DEBUGASSERT.  From Jussi Kivilinna (2017-10-13).
	* FS FAT: Fix hard-fault when listing contents of FAT root.  From Jussi
	  Kivilinna (2017-10-13).
	* configs/stm32f4discovery:  Add a USB MSC configuration.  From Alan
	  Carvalho de Assis (2017-10-13).
	* 6LoWPAN:  Correct a bug in handling uncompressed frames (IPv6
	  dispatch) (2017-10-13).
	* 6LoWPAN:  Fix a whole in the logic of the previous commit.  It turns
	  out that g_uncomp_hdrlen has other usages so it cannot be modified as I
	  was doing.  Instead, I needed to add a separate localt variable,
	  protosize, to keep track of the two usages of g_uncomp_hdrlen
	  (2017-10-13).
	* configs/: The nx and nxtext examples no longer supports single user
	  mode (2017-10-14).
	* The lcdrw example has been removed because it violates the portable OS
	  interface (2017-10-14).
	* All configurations that use NXIMAGE or NXHELLO must select
	  NX_MULTIUSER.  All configurations that use examples/nxterm must enable
	  CONFIG_LIB_BOARDCTL (2017-10-14).
	* configs/stm32f103-minimum: Add support for LM75 in the
	  stm32f103-minimum board.  From Alan Carvalho de Assis (2017-10-14).
	* configs/: All configurations that use NXLINES must select
	  NX_MULTIUSER.  All configurations that use the NX server need to have
	  larger POSIX messages (2017-10-14).
	* boardctl():  Remove the BOARDIOC_GRAPHICS_SETUP command (2017-10-15).
	* Initial ADC support for the STM32F33XX
	    - stm32_adc.h: add JEXTSEL definitions and hrtim trigger configuration
	    - stm32_adc.c: move STM32F33 ADC logic to a separate file
	  From Mateusz Szafoni (2017-10-15).
	* configs/sim: Update touchscreen driver initialization to use only
	  multiple-user NX server logic (2017-10-15).
	* configs/sim:  Convert the traveler configuration so that it uses the
	  framebuffer driver (2017-10-16).
	* task_delete():  Do not permit user applications to delete kernel
	  threads (2017-10-16).
	* kthread_create():  Rename kernel_thread() to kthread_create() for
	  better naming consistency with task_create() and kthread_delete()
	  (2017-10-16).
	* All other STM32: SHIFTR_SUBFS_MASK was correct in STM32F0 only
	    - STM32L1: use correct EXTI line definitions (2017-10-17).
	* STM32 RTC fixes:
	    - RTC: canceling an alarm marks it as inactive
	    - STM32L4, STM32F4, STM32F7 RTC: fix reading alarm value that is
	      more than 24h in future
	    - STM32F0 RTC: fix backup register count in stm32_rtcc.h
	  From Juha Niskanen (2017-10-17)
	* BCM2708: Add system timer register definitions and a partial
	  implementation of the tickless mode timer (2017-10-17).
	* BCM2708: Add support for AUX interrupts.  Add some build configuration
	  and support logic for low-level serial output (2017-10-17).
	* drivers/usbdev: Correct input flow control logic when watermarks are
	  not enabled.  Problem noedt by and change based on suggestion by Juha
	  Niskanen (2017-10-18).
	* BCM2708:  Add hooks to support both Mini- and PL011 UARTs (2017-10-18).
	* BCM2708: Fleshes out GPIO interrupt logic (2017-10-18).
	* fs/vfs:  Fix after recent changes.  write() was return negative values
	  in errno. Noted by Jussi Kivilinna (2017-10-18).
	* drivers/usbdev:  Move test for NULL pointer before the pointer is
	  deferences.  Noted by Juha Niskanen (2017-10-18).
	* net/:  Fix some build issues noted when both IPv4 and IPv6 are
	  enabled.  From Anthony Merlino (2017-10-18).
	* photon:  Support SPI1 and SPI3.  From Anthony Merlino (2017-10-18).
	* BCM2708: Allow pass parameters with AUX interrupts; Add mini-UART
	  break capability.  BCM2708: Add Mini-UART logic.  Still missing UART
	  configuration logic (2017-10-18).
	* Alexey T, Bitbuck Issue 73:  Lower part of STM32 CAN driver
	  arch/arm/src/stm32/stm32_can.c uses all three hw tx mailboxes and clears
	  TXFP bit in the CAN_MCR register (it means transmission order is defined
	  by identifier and mailbox number).

	  This creates situation when order frames are put in upper part of CAN
	  driver (via can_write) and order frames are sent on bus can be
	  different (and I experience this in wild).  Since CAN driver API
	  pretends to be "file like" I expect data to be read from fd the same
	  order it is written. So I consider described behaviour to be a bug.

	  I propose either to set TXFP bit in the CAN_MCR register (FIFO
	  transmit order) or to use only one mailbox (2017-10-19).
	* The timer frequencies (BOARD_TIMx_FREQUENCY) are incorrectly defined
	  in configs/stm3240g-eval/include/board.h.  Since the APB prescalers are
	  set to divide by 4 and 2 respectively, the frequencies should be
	  "2xAPBx" as said in the comment.  The correct frequencies are already
	  defined but as STM32_APBx_TIMx_CLKIN.  From Mattias Edlund (2017-10-19).
	* drivers/ioexpander:  The IRQ subsystem now supports passing a void *
	  parameter to IRQ handlers.  Use that method to support multiple pc9555
	  devices, by passing a pointer to the device to the board defined irq
	  handler.  Now the CONFIG_ for multiple PCA devices just allocates device
	  structures dynamically instead of statically when not enabled.

	  The same interrupt handler is entered with the device structure
	  parameter in all situations, multiple or single PCA. One should still
	  be careful if multiple PCA devices share the same IRQ.  From Sebastien
	  Lorquet (2017-10-19).
	* libc/match:  Use of exp() vs expf() in logf() caused function to be
	  slow.  From Alan Carvalho de Assis (2017-10-19).
	* drivrs/mtd/filemtd.c: add block device MTD interface.  Block MTD
	  interface allows using block device directly as MTD instead of having to
	  use file-system in between.  NOTE that this provides the opposite
	  capability of FTL which will let you use an MTD interface directly as a
	  block device.  From Jussi Kivilinna (2017-10-19).
	* There was a reference counting problem in the TPC logic of
	  net_clone().  net_clone() which is the common logic underlying dup() and
	  dup2() for sockets.  When net_clone() calls net_start_monitor() and
	  net_start_monitor() returns a failure (because the underlying TCP
	  connection) then net_clone() must back out the reference count on the
	  structure.  Problem noted by Pascal Speck and this implementation of the
	  solution is based on his suggestion (2017-10-19).
	* There was a possible recursion that could eventually overflow the
	  stack.  The error occurred when closing the socket with inet_close()
	  while a socket callback was still queued.  When the socket callback was
	  executed by devif_conn_event(), this resulted in a call to
	  psock_send_eventhandler() with TCP_CLOSE flag set which then called
	  tcp_lost_connection().  tcp_shutdown_monitor() then called
	  tcp_callback() again, which again called psock_send_eventhandler(), and
	  so on....  Noted by Pascal Speck.  Solution is also similar to a
	  solution proposed by Pascal Speck (2017-10-19).
	* nucleo-f334r8/adc: change serial console to USART2 (STLINK COM).  From
	  Mateusz Szafoni (2017-10-19).
	* stm32f33xxx_adc.c: fix some warnings and compilation error when extsel
	  not in use.  From Mateusz Szafoni (2017-10-19).
	* net/tcp:  Same change to tcp_send_buffered.c probably also applies to
	  tcp_send_unbuffered.c (2017-10-19).
	* net/tcp:  Same change to tcp_send_buffered.c probably also applies to
	  tcp_sendfile.c (2017-10-19).
	* tcp_lost_connection() is called from two places in tcp_sendfile.c
	  (2017-10-19).
	* net/tcp:  Same change to tcp_send_buffered.c probably also applies to
	  sixlowpan_tcpsend.c and inet_recvfrom.c (2017-10-19).
	* drivers/sensor: Add driver for the APDS-9960 gesture sensor.  From
	  Alan Carvalho de Assis (2017-10-20).
	* include/nuttx/sensors/ioctl: deduplicate SNIOC_CFGR.  From Jussi
	  Kivilinna (2017-10-20).
	* drivers/sensors/hts221: power-on sensor for loading calibration data.
	  From Jussi Kivilinna (2017-10-20).
	* arch/arm/src/stm32f7/i2c: fix I2C_M_NORESTART handling.  From Jussi
	  Kivilinna (2017-10-20).
	* drivers/sensors/apds9960.c: Use work_queue to read/process data when
	  receive an IRQ.  From Alan Carvalho de Assis (2017-10-20).
	* STM32L1, STM32L4 RTC: add periodic interrupts, update L1 RTC
	  implementation
	    - STM32L4 RTC: add support experimental CONFIG_RTC_PERIODIC
	    - STM32 RTC: separate STM32L1 RTC into a separate file
	  STM32L1 RTC is very close to F4 or L4 versions, with two alarms and
	  periodic wakeup support so backported L4 peripheral to L1.
	    - RTC: Add periodic alarms to upper and lower halves
	 From Juha Niskanen (2017-10-20).
	* stm32_adc.c: clear pending interrupts.  From Mateusz Szafoni
	  (2017-10-20).
	* drivers/bch:  The character driver to block device access now supports
	  an IOCTL to get the geomtry of the underlying block device (2017-10-20).
	* fs/fat:  Remove mkfatfs from the OS.  This is a user-space application
	  and belongs in apps, not in the OS (2017-10-20).
	* configs/nucleo-f334r8: add logic for zero latency high priority
	  interrupts example.  From Mateusz Szafoni (2017-10-22).
	* Misc STM32 chagnes
	    - STM32 HRTIM:  Fix warnings related with RCC
	    - STM32F33xxx ADC:  Add some publicly visable interfaces and some
	      code to support injected channels
	    - STM32F33xxx DMA:  Add public interface to handle with DMA interrupts
	  From Mateusz Szafoni (2017-10-22).
	* stm32f103-minimum:  Add an ADPS-9960 example configuration.  From Alan
	  Carvalho de Assis (2017-10-23).
	* net/icmp: This change adds support for semi-standard IPPROTO_ICMP
	  AF_INET datagram sockets.  This replaces the old ad hoc, nonstandard way
	  of implementing ping with a more standard, socket interface (2017-10-23).
	* net/inet:  Add check for protocol before handing out TCP and UDP
	  sockets (2017-10-23).
	* arch/arm/common/up_checkstack: fix assert panic when both TLS and
	  interrupt stack are enable.  From Jussi Kivilinna (2017-10-23).
	* net/icmp:  Correct some comments, typings, spacing problems from last
	  big ICMP socket change (2017-10-23).
	* configs/:  All defconfig filess that include
	  CONFIG_NET_ICMPv6_SOCKET=y need to select CONFIG_SYSTEM_PING6=y and
	  deselect CONFIG_DISABLE_POLL (2017-10-24).
	* net/icmpv6: This commit adds support for semi-standard IPPROTO_ICMP6
	  sockets.  This is a replacement for the non-standard ICMPv6 ping support
	  that violated the portable POSIX OS interface (2017-10-24).
	* mm/mm-heap: memalign: fix heap corruption caused by using unaligned
	  chuck size.  Unaligned nodes generated by memalign later cause heap
	  corruptions when nodes are shrink further (for example, 24 bytes -> 8
	  bytes, when alignment is 16 bytes).  From Jussi Kivilinna (2017-10-24).
	* lm3s8962:  NX configuration needs CONFIG_NXSTART_EXTERNINIT=y
	  (2017-10-24).
	* sched/:  move POSIX thread specific data from pthread TCB to common
	  TCB structure.  This change allows using
	  pthread_getspecific/pthread_setspecific from main thread. Patch also
	  enables using pthread data with config option CONFIG_DISABLE_PTHREAD=y.
	  From Jussi Kivilinna (2017-10-25).
	* net/local: fix typo in config macro name.  From Juha Niskanen
	  (2017-10-25).
	* Olimex stm32-h407 serial support for the on-board UEXT connector
	  (fixed style & defconfig).  Add USART6 for UEXT connector.   Add
	  nsh_uext configuration and README update.  From Jan Pobříslo (2017-10-26).
	* configs/nucleo-l496zg/nsh: enable I2C4 bus with i2ctool.  From Jussi
	  Kivilinna (2017-10-26).
	* arch/arm/stm32f7: i2c: restore bus frequency after I2C reset.  Copy
	  frequency restoration fix from STM32L4 I2C driver to STM32F7 I2C
	  driver.  From Jussi Kivilinna (2017-10-26).
	* arch/stm32l4: port STM32F7 I2C driver to STM32L4.  STM32L4 I2C driver
	  is in work-in-progress state (plentiful of TODOs and #warnings) and lags
	  many features found in more up-to-date STM32 I2C drivers. The peripheral
	  on STM32F7 and STM32L4 are identical except for L4's 'wakeup from stop
	  mode' flag and STM32F7's I2C driver is in more 'ready to use' state.

	  Commit ports the STM32F7 I2C driver to STM32L4. The I2C clock
	  configuration is kept the same as before (I2CCLK = PCLK1 80 Mhz)
	  instead of switching to STM32F7 arch default that is I2CCLK=HSI.
	  Further work would be to add configuration option for choosing I2C
	  clock source instead of current hard-coded default.  From Jussi
	  Kivilinna (2017-10-26).
	* drivers/sensors/lis2dh: fixes for self-test.  From Jussi Kivilinna
	  (2017-10-26).
	* include/nuttx/fs/:  Move prototype of foreach_mountpoint out of
	  include/nuttx/fs/fs.h to fs/mount/mount.h (2017-10-26).
	* fs/mount:  Implements procfs /proc/fs/blocks and /proc/fs/usage files,
	  replacing the NSH df command.  Also implements procfs /proc/fs/mount
	  file, replacing the NSH mount command when there are no arguments
	  (2017-10-26).
	* Correct a problem that was causing an apparent directory to be
	  reported as a file instead of a directory by opendir.  This happened
	  after adding these three new procfs entries: fs/block, fs/mount, and
	  fs/usage.  Of course, there is no directory fs in this case, only three
	  files that have fs/ in their relative pathnames.  The logic was
	  detecting that fs was the name of the enty to report, but it was then
	  declaring that fs was a file (because fs/block is of type file).  This
	  was fixed by adding a check for matching lenghts.  i.e., if strlen(fs)
	  != strlen(fs/block), then report fs as a directory instead of a file
	  (2017-10-26).
	* fs/procfs: Missing some conditional logic for cases where mountpoint
	  procfd entries excluded (2017-10-27).
	* drivers/can/mcp2515.c: Fix the MCP2515 Bit Rate Prescale
	  calculation.   Fix BRP for SET_BITTIMING ioctl as well.  From Alan
	  Carvalho de Assis (2017-10-27).
	* sensors/lis2dh:  Fix use of obsolete dbg macro.  From Jussi Kivilinna
	  (2017-10-27).
	* nucleo-f334r8:  Add highpri example configuration.  From Mateusz
	  Szafoni (2017-10-28).
	* STM32 F33xx:  Add ADC DMA support to STM32F33 configuration.  From
	  Mateusz Szafoni (2017-10-28).
	* drivers/net:  Remove the old, unfinished Crystal LAN driver.  I don't
	  even have the hardware that it goes with anymore (2017-10-28).
	* configs/mx1ads:  This commit removes board support for the mx1ads
	  board.  That board support was never completed and I no longer even have
	  the hardware.  The unfinished board support is still available in the
	  Obsoleted repository if anyone would ever like to resurrect it
	  (2017-10-28).
	* STM32 ADC:  Added support for ADC's IO_ENABLE_TEMPER_VOLT_CH ioctl on
	  STM32F10XX and STM32F20XX.  From Dmitriy Linikov (2017-10-30).
	* STM32 F2: Fixed build for STM32F20XX platforms when
	  CONFIG_STM32_DMACAPABLE is enabled.  From Dmitriy Linikov (2017-10-30).
	* fs/userfs:  This completes coding of the UserFS client and of the
	  UserFS feature in general.  This feature is being merged to main now
	  because I believe it is innocuous.  It is, however, untesed.  The next
	  step will be to develop a test case to verify the feature.  Uses Unix
	  domain local sockets instead of message queues.  Easier to transfer big
	  data in local sockets than message queues (2017-10-30).
	* Fix DEBUGASSERT() issues with nxhello on lc823450-xgevk
	    - sched/task: Remove DEBUGASSERT in task_exitstatus() and
	      task_groupexit()
	    - graphics: Change DEBUGASSERT condition in nx_runinstance()
	  From Masayuki Ishikawa (2017-10-31).
	* Fix GPIO operation of STMPE811 driver.
	  1. STMPE811_GPIO_DIR was defined for register name and later was
	  redefined to be the pin direction mask for `stmpe811_gpioconfig`.  I
	  decided to change register name to be STMPE811_GPIO_DIR_REG, and keep
	  pin direction mask STMPE811_GPIO_DIR, so that any external code that
	  already use this driver will be unchanged.
	  2. The STMPE811 register GPIO_DIR uses bit value 1 for output and 0
	  for input, but `stmpe811_gpioconfig` set the opposite.
	  3. The call to `stmpe811_gpiowrite` from inside of
	  `stmpe811_gpioconfig` leaded to deadlock.
	  From Dmitriy Linikov (2017-10-31).
	* sim/userfs:  Add a configuration for testing the UserFS using
	  apps/examples/userfs (2017-10-31).
	* Fixes a memory leak that is caused because the client message queue is
	  not unlinked after the client disconnects from the NX server.  From
	  Masayuki Ishikawa (2017-10-31).
	* drivers/wireless/ieee80211:  Fix typos and spelling errors as needed
	  for Photon build.  From Anthony Merlino (2017-11-01).
	* net/icmpv6:  Add some header file necessary for correct build.  From
	  Anthony Merlinoo (2017-11-01).
	* libc/userfs: Correct return value from dispatchers.  Should return
	  zero on success, not the number of bytes sent (2017-11-01).
	* net/ipforward: Fixes typo that caused build error when IP forwarding
	  was enabled with CONFIG_NET_ICMPv6_NEIGHBOR enabled as well.  From
	  Anthony Merlino (2017-11-01).
	* ieee802154: Simplifies notify() and rxframe() calls to a single
	  notify() call. dataind's and all other "notifs" are now "primitives"
	  which aligns with standard terminology  From Anthony Merlino (2017-11-01).
	* fs/userfs: Correct check for response type (2017-11-01).
	* net/local: This commit modifies the Unix domain local socket design.
	  Local sockets are built on top of pipes.  The Local socket
	  implementation maintained file descriptors to interrupt with the pipes.
	  File descriptors have the bad property that they are valid only while
	  running on the thread within the task that created the local socket.

	  As a policy, all internal OS implementations must use "detached" files
	  which are valid in any context and do not depend on the validity of a
	  file descriptor at any point in time.  This commit converts the usage
	  of file descriptors to detached files throughout the local socket
	  implementation (2017-11-02).
	* fs/userfs:  There are some deadlock issues that make the UserFS
	  un-usable at the current time.  Added to the TODO list; also feature is
	  now marked EXPERIMENTAL (2017-11-02).
	* drivers/serial/serial.c:  Optimize wait time in tcdram() for buffer
	  emptying.  According to the specification, the close function must wait
	  until all data has been written before it closes the file (except
	  O_NONBLOCK is set). The maximum waiting time for this is not specified.

	  To be able to edit the file list of the process, the close function
	  has to lock the file list semaphore. After that the close function of
	  the serial driver is called.

	  Waiting for the complete transmission of all data is done in the
	  serial driver.  This causes the semaphore to remain locked until all
	  data has been sent.  However, no other thread of the process can edit
	  the file list for that time  (open, close, dup2, etc.). This is not
	  optimal in a multithreaded environment.  Therefore, we have to keep
	  the waiting time within the driver as short as possible.  From Frank
	  Benkert (2017-11-02).
	* drivers/loop: Don't use file descriptors... Use the internal file
	  system interfaces so that the loop device can be shared across threads
	  (2017-11-02).
	* drivers/mtd/filemtd.c: Don't use file descriptors... Use the internal
	  file system interfaces so that the loop device can be shared across
	  threads (2017-11-02).
	* mac802154: Fixes a warning for unused variable and returns -1 from
	  macnet_notify() if event is not used.  From Anthony Merlino (2017-11-03).
	* drivers/lcd/max7219.c: Add support to MAX7219 LED Matrix as LCD
	  interface.  From Alan Carvalho de Assis (2017-11-04).
	* configs/stm32f103-minimum: Add board support for MAX7219 LED Matrix
	  controller.  From Alan Carvalho de Assis (2017-11-04).
	* stm32f334-disco, nucleo-f334r8: add missing ram_vectors configuration
	  in linker script.  From Mateusz Szafoni (2017-11-04).
	* Kconfigs: Add CONFIG_LCD_UPDATE that works like CONFIG_NX_UPDATE but
	  can be enabled without enabling the graphics subsystem (2017-11-04).
	* SAMv71-XULT:  Remove non-functional framebuffer configuration
	  (2017-11-05).
	* stm32f103-minimum: Remove warning when selecting MMCSD support, Add
	  board_usbmsc_initialize to stm32f103-minimum.  From Alan Carvalho de
	  Assis (2017-11-05).
	* nucleo-f334r8/highpri: missing ADC trigger configuration.  From
	  Mateusz Szafoni (2017-11-05).
	* stm32f334-Disco: beginning of lower-half driver for SMPS (buck-boost
	  onboard converter).  From Mateusz Szafoni
	* Misc. STM32 Fixes:
	    - STM32 HRTIM: add helper macros
	    - STM32F33xxx ADC: injected channels support, fix some definitions,
	      add interface to disable interrupts
	  From Mateusz Szafoni (2017-11-05).
	* fs/userfs:  This commit converts the underlying IPC used by the
	  UserFS from Unix domain local sockets to UDP LocalHost loopback
	  sockets.  The problem with the local sockets is that they do require
	  operations on the top level pseudo-file system inode tree.  That tree
	  must be locked during certain traversals such as enumerate mountpoints
	  or enumerating directory entries.

	  This conversion is unfortunate in the sense that Unix local domain
	  sockets are relatively lightweight.  LocalHost UDP sockets are much
	  heavier weight since they rely on the full UDP stack.  If anyone is
	  up for a complete redesign, then using some shared memory and a POSIX
	  message queue would be lightweight again.

	  This commit also fixes several bugs that were not testable before the
	  inode tree deadlock.  I cannot say that the logic is 100% stable but
	  it does not have basic functionality (2017-11-05).
	* fs/userfs:  Fix return value from dup method.  In order to return a
	  pointer, the parameter must be a pointer to a pointer (2017-11-06).
	* configs/stm32f429i-disco/ltdc:  This configuration has been deleted
	  because it violated the portable POSIX OS interface.  It used
	  apps/examples/ltdc and include ltdc.h and dma2d.h which were also
	  removed for the same reason (2017-11-06).
	* arch/arm/include/stm32 and stm32f7:  Remove ltdc.h and dma2d.h.
	  Those header files in that location permitted inclusion into
	  application space logic and, hence, facilitated and encouraged calling
	  into the OS and violating the portable POSIX OS interface.  The
	  definitions in those header files were move the appropriate location in
	  the counterpart, architecture specific files at arch/arm/src/stm32 and
	  stm32f7 dma2d.h and ltdc.h (2017-11-06).
	* lpc43xx Ethernet:  Fix some backward logic setting full-duplex and
	  100mbps when autoconfiguration is disabled.  Noted by Anonymous in
	  Issue #76 (2017-11-06).
	* sched/sched/sched_cpuselect.c:  For SMP, In order to find the cpu
	  with the lowest priority thread, we have to remember the already found
	  lowest priority.  Noted by Anonymous in Issue #75 (2017-11-06).
	* Add IPL2 support for LC823450
	    - arch/arm/src/lc823450: Add IPL2 support
	    - configs/lc823450-xgevk: Add IPL2 support
	  From Masayuki Ishikawa (2017-11-07).
	* drivers/audio: Add WM8774 support.  From Masayuki Ishikawa
	  (2017-11-08).
	* lc823450-xgevk audio support
	    - arch/arm/src/lc823450: Add IPL2 support
	    - configs/lc823450-xgevk: Add IPL2 support
	    - libc/audio: Fix compilation error in lib_buffer.c
	    - arch/arm/src/lc823450: Add I2S support
	    - configs/lc823450-xgevk: Add WM8774 support
	  From Masayuki Ishikawa (2017-11-08).
	* drivers/usbdev/rndis.c: fix packet receiving logic.  The logic didn't
	  take single-byte termination frames in account.  From Sakari Kapanen
	  (2017-11-08).
	* net/icmpv6/icmpv6_radvertise.c: Add option to manually specify router
	  prefix.  From Sakari Kapanen (2017-11-08).
	* net/icmpv6/icmpv6_radvertise.c: set the prefix length to
	  preconfigured value (2017-11-08).
	* STM32 L4 RCC: restore backup-registers after backup-domain reset.
	  From Jussi Kivilinna (2017-11-08).
	* STM32 L4: Build stm32l4_idle.c only if  CONFIG_ARCH_IDLE_CUSTOM is
	  not enabled.  From Jussi Kivilinna (2017-11-08).
	* drivers/power/bq2429x.c: Add BATIO_OPRTN_SYSON for enabling BATFET
	  after SYSOFF.  From Jussi Kivilinna (2017-11-08).
	* lc823450 auto LED support
	    - arch/arm/src/lc823450: Add auto LED for CPU activity
	    - configs/lc823450-xgevk: Add auto LED support
	  From Masayuki Ishikawa (2017-11-09).
	* tools/configure.sh: This commit adds a -m option for macOS. For
	  anyone not aware, Apple renamed OSX to macOS recently; thus the 'm'
	  instead of 'o'. This does not change the other uses of *_OSX to macOS.
	  From jeditekunum (2017-11-09).
	* tools/configure.c:  Update functionality to match last change to
	  tools/configure.sh (2017-11-10).
	* STM32L4 serial PM interface improvements:  Check rx/tx buffers for
	  pending data in pmprepare.  Remove adhoc PM interfaces and move serial
	  suspend functionality behind CONFIG_PM.  From Jussi Kivilinna
	  (2017-11-10).
	* procfs: Fix uptime being clse to maximum 32-bit value in certain
	  config.  From Juha Niskanen (2017-11-10).
	* libc:  Add support for readv() and write(). Also includes some
	  cosmetic changes to some unrelated files (2017-11-11).
	* libc/signal:  Add support for sigwait() (2017-11-11).
	* sched/signal/sig_nanosleep.c and libc/time/lib_nanosleep.c:
	  Implement clock_nanosleep().  nanosleep() is now reduced to a libc
	  wrapper around clock_nanosleep() (2017-11-11).
	* Changes from review of clock_nanosleep():  Misplaced right bracket,
	  but return value in one failure case (2017-11-11).
	* include/netinet/tcp.h:  Add trivial standard tcp.h header file
	  (2017-11-12).
	* Trivial re-ordering of socket option bit numbers to match order
	  presented on OpenGroup.org (2017-11-12).
	* arch/arm/src/stm32/stm32f33xx_adc.c:  Eliminate warnings about
	  cj_channels and j_chanlist being set but not used (2017-11-12).
	* configs/stm32l476-mdk: Add support for the on-board LEDs (2017-11-12).
	* include/netinet/tcp.h:  Add trivial standard tcp.h header file
	  (2017-11-12).
	* configs/stm32l476-mdk:  Repartition bring-up logic so that it is more
	  like other board directories.  Add support for USERLED driver.  Add
	  bring-up initialization logic for the USERLED driver (2017-11-12).
	* drivers/usbdev/rndis.c:  Fix some issues in rndis.c  Introduce
	  rndis_transmit() and change rndis_rxdispatch() to avoid packet
	  corruption. Introduce max packet size for dual speed whichis mainly
	  used for high speed mode. Fix adjusting MTU warning on Linux host. Fix
	  data corruption if a packet size excceds MTU.  NOTE: Max packet size is
	  not configured dynamically. This should be fixed in the future
	  version.  Change HPWORK to ETHWORK.  NOTE: In the commit 07b98ccbb5,
	  max packet size of bulkout was assumed to be 64. In this commit,
	  priv->epbulkout->maxpacket is used instead.  From Masayuki Ishikawa
	  (2017-11-13).
	* configs/stm32f4discovery: RNDIS support on STM32F4Discovery
	    - Add rndis configuration.  NOTE: STM32F4Discovery + DM-STF4BB
	    - Add stm32_netinit.c to avoid a compilation error
	    - Add rndis initialization in stm32_bringup.c
	  NOTE: MAC address for the host side starts 0xaa.  This assignment
	  scheme should be fixed later.  From Masayuki Ishikawa (2017-11-13).
	* configs/:  apps/system/free has been deleted because it violates the
	  portable POSIX OS interface.  Remove CONFIG_SYSTEM_FREE=y from all
	  defconfig files (2017-11-13).
	* fs/procfs/fs_procfsprogrem:  Add /proc/progmem.  This is an
	  alternative way to get the information that was previoulsy available in
	  apps/system/free.  apps/system/free was removed beause it made illegal
	  calls into the OS violating the portable interface.  This new procfs
	  entry provides the same information with no such violation (2017-11-13).
	* Nucleo-F746ZG: Use the serial console over /dev/ttyACM0 by default.
	  The Nucleo-F746ZG doesn't come with Arduio RS-232 shield, then it is
	  better to use the serial over the /dev/ttyACM0 that is created
	  automatically when the board is plugged in the computer.  From Alan
	  Carvalho de Assis (2017-11-13).
	* SAMA5/SAMv7:  It is necessary to disable pre-emption and interrupts
	  around a loop that copies TX data into the hardware in order to avoid a
	  TX data underrun condition.  From Anthony Merlino (2017-11-13).
	* fs/profcs:  Add file to show user space heap.  This replaces the NSH
	  free command (2017-11-13).
	* fs/procfs:  Optimization of previous commits.  /proc/umm and
	  proc/progmem are deleted.  /proc/kmm is renamed /proc/meminfo and
	  contains the output that was in all three files previously (2017-11-13).
	* configs/stm32f439i-disco:  Add an fb configuration (2017-11-13).
	* configs/stm32f429i-disco/fb:  Fix a compile issue.  Disable all NX
	  features in the fb configuration.  NX is not needed (2017-11-13).
	* configs/stm32f429i-disco/fb:  Refactor initialization logic so that
	  it is a little more like other boards.  Remove double initialization of
	  framebuffer or LCD drivers (whichever is enabled) (2017-11-13).
	* configs/stm32f429i-disco:  Add logic to auto-mount procfs.  Enable
	  procfs in all configurations that use NSH (2017-11-13).
	* configs/stm32f429-disco/fb:  Enable support for the STMPE811
	  touchscreen controller and also for the apps/exmaples/touchscreen test
	  (2017-11-14).
	* Remove CONFIG_GRAN_SINGLE.  It adds no technical benefit (other than
	  some minor reduction in the number of interface arguments) but adds a
	  lot of code complexity.  Better without it (2017-11-14).
	* mm/mm_gran:  Add a function to get information about the state of the
	  granuale allocator (2017-11-14).
	* fs/procfs:  Add logic to show the state of the page allocator in
	  /proc/meminfo (2017-11-14).
	* mm/mm_gran:  Fix some issues found during test of the new gran_info()
	  interface (2017-11-14).
	* configs/stm32429i-disco/src:  Fix a compile error when
	  CONFIG_BOARD_INITIALIZE is defined (2017-11-14).
	* configs/lc823450-xgevk: Fix compilation errors on Cygwin.  From
	  Masayuki Ishikawa (2017-11-15).
	* mm/mm_gran:  Combine some common logic into a function (also fixes a
	  subtle bug) (2017-11-15).
	* Build system:  Fix CONFIG_BUILD_KERNEL logic directories that have
	  ubin and kbin subdirectories.  Conditional logic was fine for
	  CONFIG_BUILD_FLAT and CONFIG_BUILD_PROTECTED but generated useless
	  dependencies if CONFIG_BUILD_KERNEL (2017-11-15).
	* arch/arm/src/lpc43: Add LPC43xx CAN driver.  From Alexander Vasiljev
	  (2017-11-15).
	* arch/arm/src/lpc43: UART_RX pins should be configured with input
	  buffers enabled. Otherwise it cannot be read.  From Alexander Vasiljev
	  (2017-11-15).
	* STM32F429i-Disco: Convert NxWM configuration to use LTDC framebuffer
	  driver instead of SPI serial.  Also reduce number of layers from 4 to 1
	  in fb configuration.  Only one layer is used (2017-11-15).
	* configs/stm32f429i-disco/ide:  Remove the uVision IDE setup that goes
	  along with the ltdc configuration that was removed on 2017-10-28
	  (2017-11-16).
	* configs/stm3220g-eval/ide:  Remove the uVision IDE setup.  This has
	  not been used for years and it a maintenance problem for me (2017-11-16).
	* arch/arm/src/xmc4: Fix XMC4xxx USIC UART sginal to be high level when
	  in idle.  From Alan Carvalho de Assis (2017-11-16).
	* arch/arm/src/xmc4: Kconfig was not selecting XMC4_USIC for USIC1.
	  From Alan Carvalho de Assis (2017-11-16).
	* configs/xmc4500-relax: Add config for UART3 on RXD P0.0 and TXD P0.1
	  pins.  From Alan Carvalho de Assis (2017-11-16).
	* STM32 F72xx and F73xx:  Add register definition header files and
	  clocking logic.  From Bob Feretich (2017-11-17).
	* STM32F7:  Fix typos in two RCC register definition header files.
	  From Bob Feretich (2017-11-17).
	* STM32F7:  Completes architecture support for the STM32 F72x and F73x
	  families.  Adds support for the Nucleo-144 boards with STM32F722.  From
	  Bob Feretich (2017-11-18).
	* configs/sim:  Disable NX graphics support in the fb configuration.
	* libnx:  Changes to allow the font subsystem to be built without
	  enabling the entire graphics system (CONFIG_NX).  Adds CONFIG_NXFONTS
	  and CONFIG_NXGLIB.  NX and NXFONTS are still pretty heavily entangled.
	  Needed to duplicate some Kconfig setting for NXFONTs if it can be
	  configured and built independently of NX.  Also includes some
	  build-related fixes (2017-11-18).
	* configs/mcb1700: Add support for Keil MCB1700 board.  From Alan
	  Carvalho de Assis (2017-11-18).
	* configs/open1788/pdcurses:  Add a configuration for testing pdcurses
	  (2017-11-19).
	* C library: Fix sscanf character conversion (%c): do not add '\0' at
	  the end as for strings, cause, for example, parsing one character will
	  fill two bytes: character itself and zero one '\0' after it, so will
	  overflow one byte variable argument and corrupt memory for variables
	  allocated after it.  From Oleg Evseev (2017-11-19).
	* arch/arm/src/xmc4:xmc4_uart_configure() expects the channel# not
	  uartbase as an input parameter.  From Alan Carvalho de Assis
	  (2017-11-20).
	* configs/open1788:  Add support for the discrete joystick driver.
	  Update the pdcurses configuration to use apps/examples/djoystick
	  (2017-11-20).
	* net/icmpv6:  icmpv6_input() needs to set d_len to 0 after consuming
	  echo reply, otherwise, garbage will get sent out.  From Anthony Merlino
	  (2017-11-20).
	* configs/open1788:  Enable discrete joystick input.  This is
	  sufficient to get through all menuing that does not require text input
	  (2017-11-20).
	* net/sixlowpan:  Fix an endian-ness problem in 6LoWPAN address
	  decompression.  From Anthony Merlino (2017-11-20).
	* net/sixlowpan:  The logic that extracts interface identifier from the
	  IP address needs to be generalized to handle cases where the address is
	  not a link local address.  From Anthony Merlino (2017-11-20).
	* arch/arm/src/xmc4 UART: Enable RX/TX status and small fixes.  From
	  Alan Carvalho de Assis (2017-11-21).
	* Various fixes for errors ound while debugging OTG on L496
	    - STM32, STM32 L4, and STM32 M4: USB OTGFS DMA trace output fix
	    - STM32: Add dump buffer feature to stm32 F4 series
	    - STM32 and STM32 L4: Fix bad USB OTGFS register address
	    - STM32 L4:  Fix typo in USB OTGFS register usage
	    - STM32 L4:  Add check in USB OTGFS driver to assure that SYSCFG is
	      enabled
	    - Nucleo-L496ZG:  Make HSE on Nucleo-L496ZG default to enable USB
	  From Miha Vrhovnik (2017-11-21).
	* Two changes for STM32F7.
	  1) The first enables building with CONFIG_ARCH_IDLE_CUSTOM enabled.
	  2) The second allows changing voltage output scaling setting and
	     prevents enabling over-drive mode for low frequencies (STM32 F74xx,
	     75xx, 76xx, 77xx)
	  From Jussi Kivilinna (2017-11-21).
	* Replicate Jussi Kivilinna's change for the newly added STM32F2xx and
	  F3xx family members.  This change allows selecting voltage output scale
	  mode and enable over-drive only when needed (2017-11-21).
	* mm:  Add a debug assertion to check for integer overflow in malloc
	  (2017-11-21).
	* net/icmpv6:  Fix an error in the poll logic.  It was assume that the
	  input parmeter pvconn was valid.  It was not.  Instead, the poll logic
	  must work like the sendto() and recvfrom() logic:  It must keep a copy
	  of the conn structure in the private data (2017-11-21).
	* net/icmpv6:  Remove the 'list' field from struct icmpv6_conn_s.  It
	  is not used (2017-11-21).
	* net/icmp:  Ports the changes in ICMPv6 of commits
	  4629cf9461e5ac6f5f01ef8c9bee3ec9a60ce081 and
	  74a633ea94bc308cd2eca0ec6c2be798d5794e72 to ICMP.  ICMP and ICMPv6
	  sockets are nearly identical, bug-for-bug (2017-11-21).
	* net/sixlowpan:  Add htohs() in arguments to debug statements that
	  print IP addresses so that they are all shown in friendlier host
	  order.  From Anthony Merlino (2017-11-21).
	* stm32f33xxx_rcc:  Fix CAN clock enable.  From Mateusz Szafoni
	  (2017-11-22).
	* drivers/lcd_framebuffer.c:  If BPP is less then 8, then we need to
	  byte-align the update region (2017-11-22).
	* configs/stm32f103-minimum: Add framebuffer driver initialization for
	  stm32f103-minimum board.  From Alan Carvalho de Assis (2017-11-22).
	* mm: Fix a typo in a debug assertion (2017-11-22).
	* net/icmp and icmpv6:  Fix some errors in debug assertions introduced
	  with last changes in this area.  Also updates a REAME.txt file
	  (2017-11-22).
	* net/:  Fix some issues with regard to UDP broadcast handling.  This
	  is Bitbucket Issue #77.  This commit tentatively closes the issues,
	  subject to verification (2017-11-22).
	* sixlowpan: Support sending to a router that is on-link and may be
	  able to forward the packet for us if the destination is not reachable
	  directly.  From Anthony Merlino (2017-11-22).
	* Pass header-payload offset to application for use when the MAC layer
	  is in promiscuous mode
	    - mac802154_device: When in promiscuous mode, the char driver sends
	      the entire frame, including the MAC header.  This change adds an
	      offset field indicating the header-payload boundary. It is set to 0
	      when not in promiscuous mode as the header is not passed to the
	      application
	    - mac802154: Adds support for getting promiscuous mode state
	  From Anthony Merlino (2017-11-22).
	* USB RNDIS - Fixes minor build error while using USB RNDIS with USB
	  debugging information enabled.  From Anthony Merlino (2017-11-22).
	* clicker2-stm32: Adds support for USB RNDIS device.  From Anthony
	  Merlino (2017-11-22).
	* STM32 L4 USB OTGFS: Remove dumpbuffer feature added in the last
	  commit.  I don't want in features that cannot be controlled be via
	  Kconfig files and I do not accept debug code in the upstream GIT.  My
	  mistake for merging it in the first place (2017-11-22).
	* include/nuttx/video/fb.h:  Add definition for a Y2 color format.  I
	  don't know if this standard but I do have 2-bit greyscale hardware so
	  the definition is needed (2017-11-22).
	* sixlowpan: Fixes build error introduced by recent PR when routing
	  table is enabled.  From Anthony Merlino (2017-11-22).
	* sixlowpan: Fixes build error introduced by recent PR when routing
	  table is enabled.  From Anthony Merlino (2017-11-22).
	* net/netdev:  Add support for the SIOCGIFBRDADDR ioctl() command
	  (2017-11-22).
	* include/nuttx/audio: Remove CONFIG_SCHED_WORKQUEUE check in pcm.h.
	  From Masayuki Ishikawa (2017-11-23).
	* sched/semaphore/spinlock.c: Disable local interrupts in spin_setbit()
	  and spin_clrbit() in order to avoid a deadlock condition.  From
	  Masayuki Ishikawa (2017-11-23).
	* configs/stm32f4disovery: Add support for JLX12864G display on STM32F4
	  Discovery board.  From Alan Carvalho de Assis (2017-11-23).
	* configs:  All NX configuration... Because of recent changes to
	  libnx/nxfonts, Supported bit per pixel must be separated specified for
	  NXFONTs too and need to match the select BPP for NX (2017-11-24).
	* fs/procfs:  Correct ordering of procfs entries.  For consistency, use
	  alphabetical ordering (2017-11-24).
	* configs/xmc4500-relax:  Setup max. freq. 120MHz and setup pull-up to
	  UART RXD pin.  From Alan Carvalho de Assis (2017-11-24).
	* arch/arm/src/xmc4:  Do not run at 144MHz unless BOARD_FCPU_144MHZ is
	  selected in the board.h header file.  From Alan Carvalho de Assis
	  (2017-11-24).
	* configs/xtrs:  Removed the XTRS configuration This was an unverified
	  port of NuttX to a TRS-80 simulator.  It was removed because (1) it is,
	  as I said, unverified as well as unsupported, and (2) the TRS-80
	  simulation is a sub-optimal platform.  That platform includes a 16-bit
	  ROM image and only a 48Kb RAM space (2017-11-24).
	* arch/arm/src/xmc4:  Remove hard-coded values in clock configuration.
	  USB will be fixed later.  From Alan Carvalho de Assis (2017-11-25).
	* drivers/lcd:  Add support for external LCD initialization required by
	  some board logic.  configs/zpa214xpa:  Tried to get the LCD working
	  again unsuccessfully.  Too much bit rot I suppose (2017-11-25).
	* STM32F4 Discovery:  Fix some errors due to missing inclusion of
	  stm32_gpio.h (2017-11-25).
	* XMC4 Serial:  The Alternative Receive Interrupt was not being
	  configured (2017-11-25).
	* drivers/lcd:  Make LCD driver configuration indepently selected from
	  NX graphics configuration.  This makes things awkward and loses some
	  error checking but is a necessary step in order to make LCD drivers
	  usable when the NX graphics system is disabled (2017-11-25).
	* STM3240G-EVAL: Mount procfs if enabled (2017-11-25).
	* arm/src/xmc4: Include Alt. Interrupt Enable to RX_EVENTS and rename
	  serial GPIO configurations.  From Alan Carvalho de Assis (2017-11-25).
	* configs/: CONFIG_QENCODER was renamed to CONFIG_SENSORS_QENCODER:
	  update occurrences in several Kconfig files (2017-11-25).
	* configs/stm3240g-eval:  Add support for pdcurses and the pdcurses
	  demo programs in the 'fb' configuration (2017-11-26).
	* arch/arm/src/stm32:  Fix compile error when trace is enabled.
	  I2CEVENT_ERROR was used but never defined (2017-11-26).
	* configs/lc823450-xgevk: Enable CONFIG_SMP for audio.Update README.txt
	  regarding SMP audio.  From Masayuki Ishikawa (2017-11-27).
	* lc823450 smp audio
	    - arch/arm/src/lc823450: Remove a workaround in up_cpu_paused().
	      Introduce g_gpio_lock to improve write performance in SMP mode.
	      NOTE: This is a tentative solution and should be replaced with more
	      generic one. Add a workaround in up_txready() to avoid data
	      corruption.  From Masayuki Ishikawa (2017-11-27).
	* arch/arm/src/lpc43xx:  lpc43_adc.c was being selected by the build
	  system wehn DAC was selected (2017-11-27).
	* configs/lc823450-xgevk: Add rndis configuration.  From Masayuki
	  Ishikawa (2017-11-28).
	* drivers/input/nunchuck.c: Add Nintendo Wii Nunchuck driver.  From
	  Alan Carvalho de Assis (2017-11-28).
	* configs/stm32f4discovery/include/board.h: Remove only I2C pin config,
	  we can use PB6 and PB9.  From Alan Carvalho de Assis (2017-11-28).
	* configs/stm32f4discovery/src:  Add stm32f4discovery board support for
	  Nunchuck joystick.  From Alan Carvalho de Assis (2017-11-28).
	* net/devif: Do not add link layer header size to d_len inside
	  devif_forward().  From Anthony Merlino (2017-11-29).
	* Framebuffer Driver:  Small modification convention for multi-planar
	  displays (of which there are none) (2017-11-29).
	* configs/stm32f103-minimum: Add Nunchuck board support for
	  stm32f103-minimum board.  From Alan Carvalho de Assis (2017-11-29).
	* drivers/mtd:  Add a driver for Macronix MX35LFxGE4AB serial NAND
	  flash.  From Ekaterina Kovylova (2017-11-29).
	* net/pkt: Eliminate a compile error due to missing include and also a
	  warning (2017-11-29).
	* sched/task/task_exithook.c:  Clear atexit() function pointer before
	  calling it.  On most archs, up_assert() calls exit() so without this
	  change, if atexit() function triggers an assertion we are in endless
	  loop.  From Juha Niskanen (2017-11-30).
	* arch/arm/src/xmc4/Kconfig: Define user friendly SPI, I2C, LIN, and
	  I2S aliases to follow other arch names.  From Alan Carvalho de Assis
	  (2017-11-30).

7.24 2018-03-02 Gregory Nutt <gnutt@nuttx.org>

	* drivers/pipes: poll: fix off-by-one error in calculation of bytes in the
	  buffer.  Buffer calculation in pipe poll setup is off-by-one when read
	  index is larger than write index. This causes poll() not getting POLLIN when
	  buffer has one byte as calculation gives zero bytes in buffer.  From Jussi
	  Kivilinna (2017-12-07).
	* This adds basic architectural support for the LPC546xx family and
	  includes support for the LPCXpresso-LPC54628 board.  The basic NSH port is
	  almost complete... still lacking GPIO support and LED support.  There are
	  still no significant drivers available.
	* SMP: Introduce spin_lock_irqsave() and spin_unlock_irqrestore().  These
	  APIs are simplified version of enter_critical_section() and
	  leave_critical_section() to protect data (e.g. registers) in SMP mode.  By
	  using these APIs inside drivers, performance will be improved.  From
	  Masayuki Ishikawa (2017-12-07).
	* sixlowpan: Completes configuration options for specifying preloaded
	  address contexts for compression  From Anthony Merlino (2017-12-07).
	* configs/photon: Adds BOARD_TIMn_FREQUENCY macros  From Anthony Merlino
	  (2017-12-07).
	* arch/arm/src/lc823450 SMP improvements.  (1) Apply irq_spin APIs to
	  modifyregXX, (2) Do not use modifyreg32() to enable Mutex, (3) Modify IRQ
	  control for i2s.  Interrupt will be handled on CPU0 with this change.  (4)
	  Apply irq_spin APIs to dma/syscontrol/usbdev.  (5) Assign CPU1 to lpwork.
	  This change will improve load balancing for networking with RNDIS.  From
	  Masayuki Ishikawa (2017-12-08).
	* drivers/audio/wm8776.c: Improve stability in SMP mode.  Apply irq_spin
	  APIs to improve performance.  Repeat to process a message to avoid
	  deadlock.  From Masayuki Ishikawa (2017-12-08).
	* configs/lc823450-xgevk: Enable SPINLOCK_IRQ and NXPLAYER in rndis.  From
	  Masayuki Ishikawa (2017-12-08).
	* arch/arm/src/xmc4:  Only setup USB clock when USB PLL is enabled  From
	  Alan Carvalho de Assis (2017-12-08).
	* arch/arm/src/lpc54628:  LPCXpresso-LPC54628 NSH configuration is fully
	  functional.  From Gregory Nutt (2017-12-10).
	* arch/arm/src/lpc54xx:  Add basic build support for EMC and external
	  SDRAM.  From Gregory Nutt (2017-12-10).
	* configs/lpcxpresso-lp54629: Add logic to configure EMC pins.
	  arch/arm/src/lpc54xx: Update pin configuration for EMC pins.  All should
	  have the input file offset and fast slew rate.  From Gregory Nutt
	  (2017-12-11).
	* arch/arm/src/lpc54xx:  Add skeleton of SPI driver just as a starting
	  point.  From Gregory Nutt (2017-12-11).
	* arch/arm/src/lpc54xx:  SDRAM is now fully functional on this board!  From
	  Gregory Nutt (2017-12-12).
	* arch/arm/src/lpc54xx:  Add the ported LPC1788 LCD driver to use the
	  LPC54xx pin definitions and SYSCON.  From Gregory Nutt (2017-12-12).
	* configs/lpcxpresso-lpc54628:  Add the fb configuration testing the LCD.
	  From Gregory Nutt (2017-12-13).
	* arch/arm/src/lpc54xx:  Fix some LCD clocking.  There is now recognizable
	  albeit corrupted data on the display.  From Gregory Nutt (2017-12-13).
	* arch/arm/src/lpc43xx:  Adapt LPC176x RTC driver for the LPC43xx.  From
	  Gintaras Drukteinis (2017-12-14).
	*arch/arm/src/lpc54xx:  LCD.. Fix some misconceptions about how the video
	  address lines are used.  Fix some LCD BPP and BRG vs RGB settings.  From
	  Gregory Nutt (2017-12-14).
	* fs/fat:  CONFIG_FAT_MAXFNAME may not exceed NAME_MAX (CONFIG_NAME_MAX)
	  From Gregory Nutt (2017-12-15).
	* arch/arm/src/lpc54xx: Complete coding of the I2C driver.  I2C now appears
	  to be functional.  config/lpcxpresso-lpc54628:  Add support for I2C2 and
	  for the I2C tool to the nsh configuration.  From Gregory Nutt (2017-12-15).
	* arch/arm/src/stm32f7:  Completes support for the STM32F72x/73x family.
	  From Bob Feretich (2017-12-16).
	* arch/arm/src/lpc54xx:  Implement GPIO interrupt support.
	  configs/lpcxpress-lpc54628:  Add support for the USER button.  Enable the
	  apps/examples/button test in the NSH configuration.  From Gregory Nutt
	  (2017-12-16).
	* arch/arm/src/lpc54xx:  Fix some GPIO interrupt configuration errors.  Add
	  logic to acknowledge rising/falling edge events.
	  config/lpcxpresso-lpc545628:  Add an intermediate interrupt handler to
	  support acknowledgment of rising and falling edge interrupts.  From Gregory
	  Nutt (2017-12-16).
	* configs/indium-f7:  Adds support for the RAF Research Indium-F7 board.
	  From Bob Feretich (2017-12-16).
	* configs/*/include;  Remove prototype of xyz_boardinitialize() from
	  board.h files.  The authoritative prototype is in
	  arch/arm/src/xyz/xyz_start.h  From Gregory Nutt (2017-12-16).
	* fs/nfs/nfs_vfsops.c: Correctly infer file type.  The file type is in
	  struct nfs_statinfo_s's ns_type field, not in the ns_mode field.  From
	  Michael Jung (2017-12-17).
	* drivers/input/ft5x06.c:  Add a driver for the FT5x06 capacitive,
	  multi-touch, touchscreen controller.  configs/lpcxpresso-lpc54628:  Add
	  support for the the FT5x06.  Enable the driver as well as the apps/examples
	  touchscreen test.  Untested on initial commit.  From Gregory Nutt
	  (2017-12-17).
	* fs/fat:  Don't warn about the CONFIG_FAT_MAXFNAME being too large if long
	  file name support is not implemented.  From Gregory Nutt (2017-12-17).
	* configs:  Still trying to get consistent name.  button driver expects
	  board to define NUM_BUTTONS, not BOARD_NUM_BUTTONS.  That was changed in
	  all board.h header files, but there are still references in configs/ C
	  files to BOARD_NUM_BUTTONS  From Gregory Nutt (2017-12-17).
	* Fixed build of PCF8574 driver when its interrupts aren't enabled by
	  config.  From Dmitriy Linikov (2017-12-18).
	* net/tcp: Introduce tcp receive window control based on I/O buffer.  NOTE:
	  The algorithm is still experimental but useful for http streaming.  From
	  Masayuki Ishikawa (2017-12-18).
	* drivers/input/ft5x06:  Fix a misconception.. WAKE is an output, not an
	  input.  From Gregory Nutt (2017-12-18).
	* drivers/power/bq2429x.c:  Add trickle charging mode  From Juha Niskanen
	  (2017-12-18).
	* drivers/ft5x06:  Add a polled mode of operation for the FT5x06 in attempt
	  to work around the fact that the LPCXpresso-LPC54628 chose a non-interrupt
	  pin for the FT5x06 interrupt.  Driver is still not yet functional.  From
	  Gregory Nutt (2017-12-18).
	* drivers/ft5x06.c:  Add additional configuration options:  Optimize if
	  multi-touch capability is not used.  Add options to swap X/Y and
	  thresholding to reduce the rate of false alarm reports (with no motion).
	  From Gregory Nutt (2017-12-18).
	* configs/lpcxpresso-lpc54628:  Add an NxWM configuration.  Not yet
	  functional.  From Gregory Nutt (2017-12-18).
	* drivers/input/ft5x06.c:  Fix a problem was was causing missing reports
	  when the touch ends.  From Gregory Nutt (2017-12-18).
	*  arch/arm/src/lpc54xx:  Bring in LPC43xx SD/MMC driver from
	  https://github.com/Smoothieware/smoothie-nuttx/tree/master/nuttx/arch/arm/src/lpc43xx
	  From Gregory Nutt (2017-12-19).
	* arch/arm/src/lc823450: lc823450 http streaming improvements: (1) Use
	  spinlock APIs in lc823450_gpio.c.  (2) In SMP mode, H/W interrupts should
	  be handled on CPU0 to avoid deadlocks.  (3) Fix a potential race condition
	  in up_enable_irq(), (4) Use spinlock APIs instead of critical section APIs,
	  (5) Enable HRT_TIMER in lc823450_timerisr.c, (6) Call up_enable_irq() to
	  assign CPU0 for IRQ handling.  (7) Use spinlock APIs instead of critical
	  section APIs. (8) Fix race conditions in dma/usbdev. (9) Enable HRT_TIMER,
	  LC823450_MTM0_TICK, SPINLOCK_IRQ, (10) Enable NET_TCP_RWND_CONTROL,
	  NXPLAYER_HTTP_STREAMING_SUPPORT (rndis only)  From Masayuki Ishikawa
	  (2017-12-20).
	* syslog: Fixes LOG_UPTO macro to include specified log level  From Anthony
	  Merlino (2017-12-20).
	* Rename the configs/stm32f0discovery board directory to
	  configs/stm32f051-discovery.  There are others stm32f0discovery boards with
	  different MCUs and different peripherals on the board.  From Alan Carvalho
	  de Assis (2017-12-20).
	* This commit adds support for stm32f072b-disco board. This is the board. I
	  added the LEDs of this board and tested the compilation, more tests will be
	  needed.  From Alan Carvalho de Assis (2017-12-20).
	* drivers/sensors/hts221.c:  Fix sensor reset with BOOT bit  From Jussi
	  Kivilinna (2017-12-20).
	* arch/arm/src/lpc54xx: Add support for card detect and write protect to
	  SDMMC driver.  configs/lpcxpresso-lpc54628:  Add logic to bring up SDMMC.
	  SDMMC pin configurations should have SLEW on and FILTER off.  Add support
	  for power pin to SDMMC driver.  In SDMMC driver, don't do DMA if the entire
	  transfer will fit in the FIFO.  In SDMMC driver, add logic to transfer data
	  when TXDR or RXDR interrupts occur.  Also, add logic to set the RX
	  watermark to 2 when receiving short, non-DMA data transfers.  In SDMMC
	  driver, fix an error which was clobbering the interrupt mask register
	  (xfrmask).  Also, add a kludge for the missing DTO interrupt.  From Gregory
	  Nutt (2017-12-20).
	* arch/arm/src/lc823450: Add SP_DMB() into lc823450_testset.c.  In
	  lc823450, ldrex and strex are not supported. So we implemented up_testset()
	  with H/W Mutex. However, there was a bug in memory access order. This
	  change ensures correct memory access order in up_testset() for lc823450.
	  From Masatoshi.Tateishi (2017-12-21).
	* sched/semaphore/spinlock.c: Add memory barrier operations in
	  spin_unlock().  In ARM document regarding memory barriers, SP_DMB() must be
	  issued before changing a spinlock state to SP_UNLOCKED. However, we found
	  that SP_DSB() is also needed to ensure that spin_unlock() works correctly
	  for network streaming aging test.  From Masayuki Ishikawa (2017-12-21).
	* arch/arm/src/lpc43xx:  Add Windowed Watchdog Timer (WWDT) driver.  Tested
	  on LPC4357 but should be compatible for all LPC43xx MCUs.  From Gintaras
	  Drukteinis (2017-12-21).
	* arch/arm/src/lpc54xx:  SDMMC fixes.. DMA should not be enabled on non-DMA
	  transfers, the burst setting in FIFOTH is supposed to match the burst
	  setting in the BMOD reseters, Add DMA error interrupt support.  With these
	  changes DMA now works on the LPC54xx.  From Gregory Nutt (2017-12-21).
	* fs/vfs:  reopen should return NULL when oflags is less than 0, not equal
	  to 0. Because negative value is returned on failure of lib_mode2offlags
	  which converts the mode string into file open mode flag.  From Gregory Nutt
	  (2017-12-21).
	* tools/cvsparser.c:  Add a check to avoid access past the end of a fixed
	  size array  From Gregory Nutt (2017-12-21).
	* arch/arm/src/arm/up_cache.S: Fix cp15_invalidate_dcache.  In cases where
	  more than one dcache line was to be invalidated, a missing branch label
	  would result in a false branch target into cp15_flush_idcache.  Also the
	  .size macro was fixed for both cp15_invalidate_dcache.  From Michael Jung
	  (2017-12-22).
	* Leverage the LPC54xx SD/MMC back to the LPC43xx (where it came from
	  originally).  From Gregory Nutt (2017-12-22).
	* arch/arm/src/lpc54xx/43xx:  SDMMC driver:  Need to disable DMA interrupts
	  at completion of DMA.  From Gregory Nutt (2017-12-22).
	* configs/bambino-200e: Add LPC43 SDMMC board support to Bambino-200E and
	  fix errors/warns  From Alan Carvalho de Assis (2017-12-22).
	* arch/arm/src/lpc43xx/lpc54xx SDMDC:  Don't enable internal DMA in the
	  control register if not doing internal DMA.  Clear pending DMA-related
	  interrupts before enabling them.  From Gregory Nutt (2017-12-22).
	* arch/arm/src/lpc43/54 SDMMC:  DTO is a wait event, not a transfer event.
	  Defer enabling DMA transfer interrupts until after command has been sent.
	  From Gregory Nutt (2017-12-23).
	* arch/arm/src/lpc43/lpc54 SDMMC: Add missing test for response errors in
	  interrupt handler.  From Gregory Nutt (2017-12-23).
	* arch/arm/src/lpc54xx:  Add DMA driver ported from the LPC43xx GPDMA
	  driver.  From Gregory Nutt (2017-12-24).
	* arch/arm/src/lpc54xx:  Bring in WWDT driver from LPC43.  From Gregory
	  Nutt (2017-12-24).
	* arch/arm/src/lpc54xx: Add an RTC driver and a RTC character driver lower
	  half.  configs/lpcxpresso-lpc54628:  Add logic to register the RTC
	  character driver if it is enabled.  Enable the RTC and RTC character driver
	  in the NSH configuration.  From Gregory Nutt (2017-12-25).
	* arch/arm/src/lpc54xx:  Add support for a random number generator.  From
	  Gregory Nutt (2017-12-26).
	* arch/arm/src/lpc54xx:  Add an Ethernet driver.  From Gregory Nutt
	  (2017-12-26).
	* fs/nfs/nfs_vfsops.c: Fix buffer corruption.  In case multiple read
	  requests to the NFS server are required to fill up the user provided
	  buffer, nfs_read might write behind the end of said buffer.  This is fixed
	  with this change.  From Michael Jung (2017-12-28).
	* arch/arm/src/lpc54xx:  Ethernet drivers ready for testing.
	  configs/lpcxpresso-lpc54628:  Add a netnsh configuration that will be used
	  to test the Ethernet driver.  From Gregory Nutt (2017-12-30).
	* arch/arm/src/lpc54xx:  Finishes open design issues with AVBTP
	  multi-channel operation.  From Gregory Nutt (2017-12-30).
	* net:  Fix an error introduced when ICMP and ICMP6 socket support was
	  added in NuttX-7.3.  A gratuitous ARP (or solicitation) was being sent
	  after receive of the ECHO replay (advertisement).  From Gregory Nutt
	  (2018-01-01).
	* arch/arm/src/lpc54xx:  Correct handling of the Ethernet RBU error.  With
	  this fix, Ethernet now appears to be fully functional.  From Gregory Nutt
	  (2018-01-01).
	* Add FPU to xmc4 ostest.  Remove +x from makefiles, preserve .gdbinit
	  across make clean, add FPU support to ostest on xmc4, add FPU test to
	  ostest on xmc4  From David Alessio (2018-01-02).
	* net/arp:  Fix IGMP multicast address computation on Nuttx network stack.
	  This change fixes the IGMP address computation to allow multicast UDP
	  messages. The destination address was created with the incorrect bytes of
	  the given IPv4 address.  From Louis Mayencourt (2018-01-02).
	* stm32/chip.h: minor fixes for STM32F334  From raiden00pl (2018-01-03).
	* net/route:  Adding ftruncate() support eliminates an issue in file-based
	  routing table management system.  From Gregory Nutt (2018-01-03).
	* fs/userfs: Add truncate() support for userfs, fs/unionfs:  Add truncate()
	  support to the unionfs, fs/tmpfs:  Add ftruncate() support to tmpfs,
	  syscall/: Add system call support for ftruncate().  From Gregory Nutt
	  (2018-01-03).
	* fs/vfs:  Add support for truncate() and ftruncate().  The infrastructure
	  is complete.  Now, however, the actual implementation of ftruncate() will
	  have to be done for each file.  From Gregory Nutt (2018-01-04).
	* fs/nxffs:  Add partial implementation of the truncate method:  It
	  extends files, but cannot yet shrink them.  From Gregory Nutt (2018-01-04).
	  fs/smartfs:  Add implementation of the truncate method, fs/fat:  Add
	  implementation of the truncate method.  fs/nfs:  Add support for the
	  truncate method to the NFS file system.  From Gregory Nutt (2018-01-04).
	* net/route:  Fix a couple of compile-related issues that have crept in
	  since the last time the file-based routing table was used.  From Gregory
	  Nutt (2018-01-05).
	* configs/sim:  Add support for a RAM MTD driver and initialization for use
	  with SmartFS.  From Gregory Nutt (2018-01-05).
	* FAT.  Effectively handles the situation when a new file position is
	  within the current sector.  Accelerates the work of the FS with a multitude
	  of operations to write small pieces of data within the current sector.
	  From Aleksandr Vyhovanec (2018-01-05).
	* configs/sim:  Add support for testing NXFFS.  From Gregory Nutt
	  (2018-01-06).
	* configs/flipnclick-sam3x:  Add board support for the Mikroe Flip&Click
	  SAM3X.  From Gregory Nutt (2018-01-06).
	* configs/stm32f103-minimum:  Add AT24 EEPROM support on STM32F103-Minimum
	  board  From Alan Carvalho de Assis (2018-01-06).
	* arch/mips/include/pic32mz:  Add architectural support for the PIC32MZEF
	  family.  From Gregory Nutt (2018-01-08).
	* configs/flipnclick-pic32mz:  Adds board support for the Mikroe Flip&Click
	  PIC32MZ board.  From Gregory Nutt (2018-01-08).
	* drivers/net: Add support for telnet character mode  From Masayuki
	  Ishikawa (2018-01-09).
	* arch/arm/src/lc823450: Introduce DVFS.   This version only supports
	  manual mode and Vdd1 is fixed to 1.2V.  From Masayuki Ishikawa (2018-01-10).
	* configs/lc823450-xgevk: Enable DVFS in lc823450_bringup.c.  Enable DVFS
	  in audio and rndis. Add telnet character mode to rndis.  From Masayuki
	  Ishikawa (2018-01-10).
	* arch/arm/src/samdl: In sam_spibus_initialize(), the pinmux configuration
	  was smashing the previous CTRLA register configuration. There are also some
	  typos in samd_spi.h  From Matt Thompson (2018-01-11).
	* SAMDL fix g_spi2ops and g_spi2dev using incorrect values  From Matt
	  Thompson (2018-01-11).
	* SAMD External Interrupt Controller (EIC) support  From Matt Thompson
	  (2018-01-11).
	* fs/procfs:  Fix an error in a common function that manages read data.
	  From Gregory Nutt (2018-01-12).
	* sched/irq:  Add a configuration option to show interrupt information via
	  a procfs file.  From Gregory Nutt (2018-01-12).
	* arch/arm/src/lpc54xx:  The SPI driver is code complete but still
	  untested.  This driver is 'basic' in that in only supports polled mode
	  operations.  From Gregory Nutt (2018-01-14).
	* arch/arm/src/stm32/stm32_hrtim: fix deadtime configuration.  Add
	  interface to change outputs SET/RST configuration  From Mateusz Szafoni
	  (2018-01-14).
	* drivers/loop/losetup.c:  If we want to open read-only in losetup.c, flags
	  should be O_RDONLY not O_RDWR  From Fabio D'Urso (2018-01-14).
	* sched/clock/clock_systimer.c:  Replace critical section APIs with
	  spinlock APIs. (64bit only).  If SMP=n or SMP=y && SPINLOCK_IRQ=n, this
	  works in the same way as before.  If SMP=y && SPINLOCK_IRQ=y, performance
	  will be improved.  From Masayuki Ishikawa (2018-01-15).
	* sched/clock/clock_systimer.c:  Change the way that the 64-bit time is
	  sampled.  Previously, we disabled interrupts before sampling the 64-bit
	  timer since the uint64_t access is not atomic on most CPUs.  However,
	  disabling (local) interrupts does not work in the SMP case.  In that case,
	  the timer interrupt will be running on only one of the CPUs; disabling
	  interrupts on a different CPU will provide no protection from timer
	  rollover.  To work around this, logic was added that samples 64-bit timer
	  is sampled twice and if 32-bit rollover was detected between samples, then
	  loops until there is no rollover.  From Gregory Nutt (2018-01-15).
	* configs/nucleo-l432kc/src:  Fix some bogus logic noted by Fanda.  From
	  Gregory Nutt (2018-01-15).
	* fs/smartfs:  Fix inverted ifdef for CONFIG_SMARTFS_USE_SECTOR_BUFFER in
	  smartfs_extendfile()  From Jussi Kivilinna (2018-01-16).
	* configs/nucleo-* and configs/stm32l476vg-disco:  Fix more
	  stm32_userleds.c bogus logic  From Juha Niskanen (2018-01-16).
	* Fixes two bugs in multi-block SD-card operations on the STM32F7
	  platform.  arch/arm/src/stm32f7: DBLOCKSIZE must be the size of SD-card
	  block, not the total amount of transferred bytes.   drivers/mmcsd: respect
	  SDIO_CAPS_DMABEFOREWRITE on CMD25.  From Evgeniy Bobkov (2018-01-16).
	* Fixed nucleo-l432kc broken build when CONFIG_USERLED_LOWER defined  From
	  Fanda (2018-01-16).
	* Remove the BOARDIOC_TSCTEST_TEARDOWN boardctl() command.  Remove all
	  implementations of board_tsc_teardown() (they were all stubs anyway except
	  for the simulation).  From Gregory Nutt (2018-01-16).
	* SMP: Introduce spin_lock_wo_note() and spin_unlock_wo_note().  These APIs
	  are used in sched_note.c to protect instrumentation data.  The difference
	  between these APIs to exsiting spin_lock() and spin_unlock() is that they
	  do not perform instrumentation to avoid recursive call when
	  SCHED_INSTRUMENTATION_SPINLOCKS=y.  From Masayuki Ishikawa (2018-01-17).
	* configs:  Eliminates the BOARDIOC_TSCTEST_SETUP command. Each board now
	  initializes the touchscreen controller as a normal part of its board
	  bring-up.  board_tsc_setup() is gone; the touchscreen controller is now
	  treated like any other on-board device.
	* configs:  Since the touch screen initialization is now called from
	  one-time board-initialization logic, it no longer needs protection from
	  re-entry.  From Gregory Nutt (2018-01-17).
	* configs:  CONFIG_MAX_TASKS must be a power of 2.  From Gregory Nutt
	  (2018-01-17).
	* configs:  There should be either CONFIG_LIB_BOARDCTL=y or
	  CONFIG_BOARD_INITIALIZE=y (but not both) in the defconfig of every
	  standalone NxWM configuration to assure that all of the board resources are
	  initialized... especially the touchscreen since it is now a part of the
	  board driver initialization.  From Gregory Nutt (2018-01-17).
	* arch/arm/src/samdl: SPI must be disabled before changing the mode bits in
	  CTRLA register  From Matt Thompson (2018-01-17).
	* arch/arm/src/lc823450:  Explicitly assign I2S IRQ handling to CPU0.  From
	  Masayuki Ishikawa (2018-01-18).
	* drivers/input/ft5x06.c:  Remove logic to disable polling when there there
	  is no client waiting for read data.  That was a great idea to save CPU
	  cycles when there is nothing reading from the touchscrren but,
	  unfortunately, does not work with readers that open the driver in
	  non-blocking mode.  So I think we just have to eat the CPUs even when there
	  is nothing waiting for touchscreen input.  From Gregory Nutt (2018-01-18).
	* configs/lpcxpresso-lpc54628/lvgl:  Add LittlevGL graphics demo
	  configuration.  From Gregory Nutt (2018-01-18).
	* sched/semaphore: Add DEBUGPANIC() in nxsem_post() if no waiting task is
	  found.  From Masayuki Ishikawa (2018-01-19).
	* sched/sched/sched_sporadic.c: fix compiler error when priority
	  inheritance is enabled.  Noted by eunb.song@samsung.com  From Gregory Nutt
	  (2018-01-19).
	* sched/sched:  Fix some priority inheritance related issues noted during
	  review of logic.  Also add some REVISIT comments for some issues noted in
	  the design.  From Gregory Nutt (2018-01-20).
	* Issue #85: /dev/userleds is not working for nucleo-l432kc fixed  From
	  Fanda Vacek (2018-01-20).
	* arch/arm/src/stm32/stm32_hritm.c: Add interface to get timer clock
	  frequency, fix timer freq calculation, add compare/capture registers
	  significant bits checking.  From Mateusz Szafoni (2018-01-21).
	* stm32f334-disco: add buck converter and boost converter logic  From
	  Mateusz Szafoni (2018-01-21).
	* fs/userfs: use correct req type in userfs_truncate, remove use of
	  undeclared buf  From Juha Niskanen (2018-01-22).
	* arch/arm/src/xmc4: Refactor pll setup, refactored PLL/CLK config, easier,
	  checks for correctness, call go_os_start if STACK_COLORIZED, smarter config
	  of EXTCLK output freq.  From David Alessio (2018-01-22).
	* net/: The existence of the network driver ioctl() method should depend on
	  CONFIG_NETDEV_IOCTL rather than CONFIG_NETDEV_PHY_IOCTL.  The former
	  enables the method, the later enables a subset of possible driver IOCTLs.
	  This change should be basically a no-operation.  The affected ioctl methods
	  only support those subset of driver IOCTLs selected by
	  CONFIG_NETDEV_PHY_IOCTL and the network logic will tolerate a nul ioctl
	  method.  From Gregory Nutt (2018-01-22).
	* net/tcp:  Write buffering logic should not wait for a free buffer if the
	  socket was opened non-blocking.  Also, rename the TCP write buffering
	  macros from WRB_* to TCPWB_* to make room in the namespace for write
	  buffering with other protocols.  From Gregory Nutt (2018-01-22).
	* net/udp:  Remove some conditional logic that was true if there is only a
	  single network device, but not true in the multi-device context.  From
	  Gregory Nutt (2018-01-22).
	* net/udp:  This commit adds an implementation of UDP write buffering.
	  From Gregory Nutt (2018-01-22).
	* net/udp:  In sendto(), return EHOSTUNREACH if the network is down.  From
	  Gregory Nutt (2018-01-22).
	* drivers/mtd/at24xx.c: Correct page size for AT24C02 part.  From Alexander
	  Oryshchenko (2018-01-24).
	* arch/arm/src/stm32:  Make STM32 usable with an external RTC.
	* drivers/timers/ds3231.c:  Correct some debug statments.  From Alexander
	  Oryshchenko (2018-01-24).
	* arch/arm/src/stm32/stm32_spi.c: Removed unnecessary (and incorrect) speed
	  limitation  From Alexander Oryshchenko (2018-01-24).
	* arch/arm/src/stm32/stm32f40xxx_i2c.c:  Correct some recent changes to
	  STM32F4 I2C that broke poll mode of operation.  From Alexander Oryshchenko
	  (2018-01-24).
	* arch/arm/src/samdl: Added SAMD DAC header file. Fixed SAMD EVSYS header.
	  Added SAMD TC header file. Fixed some minor typos.  Added missing EVCTRL
	  register bits in TC.  From Matt Thompson (2018-01-24).
	* configs/flipnclick-sam3x (also Arduio-Due): Remove disabling of
	  environment, mountpoints, and poll.  Add NSH arch initialization so that
	  procfs will be automounted.  Increase task name size from 0 to 32.  Update
	  README.  From Gregory Nutt (2018-01-25).
	* arch/arm/src/samdl: Added DMAC header for SAMD, fixed up sam_dmac to
	  compile with debugging enabled  From Matt Thompson (2018-01-25).
	* arch/arm/src/samv7/sam_lowputc.c: Fix undefined variable when using
	  USART1 for other purposes than UART (e.g. SPI).  From Frank Benkert
	  (2018-01-26).
	* arch/arm/src/stm32 and stm32f7:  Remove confusing, redundant, and
	  misleading definitions of STM32_BKP_BASE from the F2, F3, and F4 memory
	  maps.  Unlike the F1, these parts do not have a separate BKP address
	  region.  The BKP registers are with the RTCC address regions.  stm32_bkp.h
	  should only be used for STM32 F1. stm32_rtcc.h should be used to access BKP
	  registers on F2, F3, and F4.  From Gregory Nutt (2018-01-26).
	* stm32/Kconfig: fix COMP7 dependency.  stm32_hrtim: add HRTIM push-pull
	  mode configuration.  stm32f334-disco: add buck-boost converter mode  From
	  raiden00pl (2018-01-27).
	* arch/arm/src/samdl: Added Analog Comparator headers and basic
	  initialization  From Matt Thompson (2018-01-28).
	* arch/arm/src/stm32:  I have a SPI bus with both Mode 0 and Mode 3 devices
	  on it.  After performing SPI I/O to a Mode 0 device, switching to a Mode 3
	  device locked up the SPI interface.  Only zeroes would be read.  I traced
	  the reason for the lock-up to arm/arm/src/stm32f7/stm32_spi.c function
	  spi_setmode().  Changing the mode causes a spurious SPI clock transmission
	  that confuses the stm32f7 SPI input hardware.  This problem is solved by
	  (1) changing the SPI mode with SPI (and perhaps DMA) disabled, and (2)
	  flushing the receive FIFO if the mode change results in garbage in the
	  FIFO.  From Bob Feretich (2018-01-29).
	* drivers/sensors:  Add support to MAX44009 ambient light sensor  From Juha
	  Niskanen (2018-01-29).
	* tools/logparser:  Add a tool which (when it matures) will help me to
	  convert git logs to ChangeLog format.  From Gregory Nutt (2018-01-29).
	* tools/:  Add #define _GNU_SOURCE to all C files that call asprintf()
	  From Gregory Nutt (2018-01-29).
	* arch/arm/src/samdl: Added Timer Compare for Control registers header
	  From Matt Thompson (2018-01-29).
	* sched/sched:  Add new internal OS function nxsched_setaffinity() that is
	  identical to sched_isetaffinity() except that it does not modify the errno
	  value.  All usage of sched_setaffinity() within the OS is replaced with
	  nxsched_setaffinity().  From Gregory Nutt (2018-01-30).
	* sched/sched:  Internal functions sched_reprioritize() and
	  sched_setpriority() no longer modify the errno value.  Also renamed to
	  nxsched_reprioritize() and sched_setpriority().  From Gregory Nutt
	  (2018-01-30).
	* sched/sched:  Add new internal OS function nxsched_getscheduler() that is
	  identical to sched_getscheduler() except that it does not modify the errno
	  value.  All usage of sched_getscheduler() within the OS is replaced with
	  nxsched_getscheduler().  From Gregory Nutt (2018-01-30).
	* sched/sched:  Add new internal OS function nxsched_setparam() that is
	  identical to sched_setparam() except that it does not modify the errno
	  value.  All usage of sched_setparam() within the OS is replaced with
	  nxsched_setparam().  From Gregory Nutt (2018-01-30).
	* sched/sched:  Add new internal OS function nxsched_getparam() that is
	  identical to sched_getparam() except that it does not modify the errno
	  value (actually, the previous value erroneously neglected to set the errno
	  value to begin with, but this fixes both issues).  All usage of
	  sched_getparam() within the OS is replaced with nxsched_getparam().  From
	  Gregory Nutt (2018-01-30).
	* sched/:  Fix several inappropriate accesses to get_errno() that were
	  missed in previous changes (some going back to nuttx-.23).  Add new
	  nxsched_setscheduler() and nxsched_getaffinity() which are equivalent to
	  their counterparts without the nx on front.  These versions do not modify
	  the errno value.  Changed all calls within the OS to use these newer
	  versions of the functions.  From Gregory Nutt (2018-01-30).
	* binfmt/, configs/, grahics/, libc/, mm/, net/, sched/:  OS references to
	  the errno variable should always use the set_errno(), get_errno() macros.
	  From Gregory Nutt (2018-01-30).
	* arch/arm/src/stm32 and stm32f7:  Architecture-specific code is not
	  permitted to modify the errno variable.  drivers/ and libc/:  OS references
	  to the errno variable should always use the set_errno(), get_errno()
	  macros.  From Gregory Nutt (2018-01-30).
	* SMP: Introduce a new global IRQ clearing logic and tasklist protection.
	  The previous implementation of clearing global IRQ in sched_addreadytorun()
	  and sched_removereadytorun() was done too early. As a result, nxsem_post()
	  would have a chance to enter the critical section even nxsem_wait() is
	  still not in blocked state. This patch moves clearing global IRQ controls
	  from sched_addreadytorun() and sched_removereadytorun() to
	  sched_resumescheduler() to ensure that nxsem_post() can enter the critical
	  section correctly.  For this change, sched_resumescheduler.c is always
	  necessary for SMP configuration.  In addition, by this change, task_exit()
	  had to be modified so that it calls sched_resumescheduler() because it
	  calls sched_removescheduler() inside the function, otherwise it will cause
	  a deadlock. However, I encountered another DEBUGASSERT() in
	  sched_cpu_select() during HTTP streaming aging test on lc823450-xgevk.
	  Actually sched_cpu_select() accesses the g_assignedtasks which might be
	  changed by another CPU. Similarly, other tasklists might be modified
	  simultaneously if both CPUs are executing scheduling logic. To avoid this,
	  I introduced tasklist protetion APIs. With these changes, SMP kernel
	  stability has been much improved.  From Masayuki Ishikawa (2018-01-31).
	* arch/arm/src/samdl:  Added I2S register definitions.  From Matt Thompson
	  (2018-01-31).
	* drivers/sensors/lis2dh:  Use realtime clock if monotonic is not
	  available  From Juha Niskanen (2018-01-31).
	* fs/aio:  Fix one additional place where the errno variable is being
	  accessed inappropriately.  From Gregory Nutt (2018-01-31).
	* sched/wdog:  wd_start() is an internal OS function and should not set the
	  errno value.  Reviewed and updated every call to wd_start() to verify if
	  return value is used and if so if the errno value is accessed.  From
	  Gregory Nutt (2018-01-31).
	* sched/task:  Add nxtask_create().  Kthread_create() and nxtask_create()
	  are internal OS functions and should not modify the errno variable.
	  configs/:  threads started by board bringup logic should be kernel threads,
	  not user tasks.  From Gregory Nutt (2018-01-31).
	* drivers/:  threads started by drivers should be kernel threads, not user
	  tasks.  Review return values for all calls to kthread_start() because it no
	  longer returns an errno.  From Gregory Nutt (2018-01-31).
	* graphics/:  Review return values for all calls to kthread_start() because
	  it no longer returns an errno.  From Gregory Nutt (2018-01-31).
	* sched/:  Convert legitimate uses of task_create() to nxtask_create().
	  Review handling of returned values from all uses of kthread_create() (as
	  well as nxtask_create()).  From Gregory Nutt (2018-01-31).
	* arm/src/kinetis:  Correct some Ethernet PHY register bit tests for the
	  KSZ8081 PHY.  From Stewart (2018-02-01).
	* libc/stdio: in dtoa(), up_interrupt_context() is used in a debug
	  assertion.  up_interrupt_context() is not available in the user-mode phase
	  of the PROTECTED or KERNEL build configurations.  In those configurations,
	  enabling libc floating point support and debug assertions will result in an
	  undefined reference to up_interrupt_context().  From Gregory Nutt
	  (2018-02-01).
	* binfmt/:  Fix one more inappropriate access to the errno variable.  From
	  Gregory Nutt (2018-02-01).
	* configs/stm32f103-minimum:  Add support to BMP180 on BluePill
	  (stm32f103-minimum) board.  From Alan Carvalho de Assis (2018-02-04).
	* armv7-a, armv7-r, armv7-m:  Add atomic read-add-write and
	  read-subtract-write functions.  From Gregory Nutt (2018-02-04).
	* spin_lock_irqsave() and spin_unlock_irqrestore() are only valid if the
	  CPU supports global disabling of interrupts.  From Gregory Nutt (2018-02-04).
	* sched/sched:  SMP: Fix this_task() to be an atomic operation.  In the
	  previous implementation, this_task() was defined in sched.h by using just a
	  macro current_task(this_cpu()).  However, I found that this is not atomic
	  and actually sometimes switching CPU happened in executing the macro when
	  we tested audio steaming plus executing commands via telnet.  This change
	  resolves this issue by implementing atomic this_task()in sched_thistask.c
	  which is newly introduced.  From Masayuki Ishikawa (2018-02-04).
	* configs/stm32f429i-disco: Separate SPI4 from MTD init.  I was trying to
	  attach a non-MTD peripheral to an STM32F429I Discovery Board's SPI4 port
	  and was hitting compilation problems, since CONFIG_MTD and thus 'struct
	  mtd_geometry_s' was not defined.  This patch separates SPI4 initialization
	  logic from MTD initialization logic.  From Michael Jung (2018-02-05).
	* sched/sched:  Implements a global scheduler lock capability as part of
	  SMP support.  This allows the scheduler to be locked with no knowledge or
	  access to the TCB of the currently running task.  This is necessary because
	  accessing the TCB of the currently running task is, itself, a non-atomic
	  operation.  This global scheduler lock capability was add just to support
	  that atomic access to the TCB.  From Gregory Nutt (2018-02-05).
	* sched/sched:  Extend the last global lock change to work with the
	  lc823450-xgevk which does not support the atomic fetch add but does support
	  disabling interprocessor interrupts.  Disabling interprocessor interrupts
	  will also guarantee that the TCB address calculation is atomic.  From
	  Gregory Nutt (2018-02-05).
	* sched/irq: Fix a infinite recursion problem that a recent change
	  introduced into the i.MX6 SMP implementation.  From Gregory Nutt
	  (2018-02-06).
	* arch/arm/src/armv7-a:  Found some additional places were the new
	  this_task() function cannot be called in the i.MX6 SMP configuration.  From
	  Gregory Nutt (2018-02-06).
	* sched/ and arch/arm/src/armv7-a:  Replace a few more occurrences of
	  this_task() with current_task(cpu) in an effort to get the i.MX6 working in
	  SMP mode again.  It does not yet work, sadly.  From Gregory Nutt
	  (2018-02-06).
	* sched/task:  It is not appropriate for logic in task_exit() to call the
	  new version of this_task().  sched/irq:  Remove redundant fetch of CPU
	  index; configs/sabre-6quad: update README.  From Gregory Nutt (2018-02-06).
	* arch/arm/src/lpc17xx:  Disable LPC17 FDR when not used.  If a boot loader
	  set the fractional divider (FDR) the baud rate in nuttx will be wrong
	  (multiplied by this fraction).  So if it is not used, it should be
	  disabled. From hg42 (2018-02-08).
	* arch/mips/src/mips32:  In up_idle, the kludge that was conditionally
	  enabled if the work queue was enable appears to be needed even when he work
	  queue is not enabled on the PIC32MZ.
	* arch/mips/src/pic32mz:  Fix some typos in debug instrumentation in
	  pic32mz-gpio.c; fix some typos related to UART5 configuration in
	  pic32mz-serial.c.
	* configs/flipnclick-pic32mz/nsh:  Switch serial console to UART3.  There
	  is some problem with the UART4 RX pin documentation or configuration.  From
	  Gregory Nutt (2018-02-09).
	* arch/arm/src/xmc4/: Fix USIC_BRG_SCLKCFG definition  From Alan Carvalho
	  de Assis (2018-02-09).
	* drivers/lcd:  Add configuration support for HiletGo OLED.
	  configs/flipnclick-pic32mz:  Add board support for HiletGo OLED.  From
	  Gregory Nutt (2018-02-10).
	* configs/flipnclick-pic32mz:  Add an nxlines configuration for use in
	  testing the custom HiletGo Click board.  From Gregory Nutt (2018-02-10).
	* arch/arm/src/samdl:  Added FDPLL clock support.  Fixed sequence of OSC32K
	  calibration setup.  From Matt Thompson (2018-02-10).
	* arch/arm/src/samdl: Fix EIC interrupt edge sensitivity for pin numbers >
	  8  From Matt Thompson (2018-02-10).
	* arch/arm/src/samdl: Added loading factory USB calibration data from
	  NVRAM  From Matt Thompson (2018-02-11).
	* arch/arm/src/stm32/stm32_hritm:  Add interface to set timer frequency,
	  fix slave timers reset configuration, change POWER_INFO to TIMER_INFO  From
	  Mateusz Szafoni (2018-02-11).
	* configs/stm32f103-minimum:  Add zerocross support to STM32F103-Minimum
	  board  From Alan Carvalho de Assis (2018-02-11).
	* configs/flipnclick-sam3x:  Adds basic board support for the HiletGo
	  OLED.  From Gregory Nutt (2018-02-11).
	* arch/arm/src/lpc17xx:  DisableDisable LPC17 FDR when not used (second
	  fix).  If a boot loader sets the fractional divider (FDR) the baud rate
	  in nuttx will be wrong (multiplied by this fraction).  This also has to
	  be added to lpc17_lowputc.c.  From Harald Gutsche (2018-02-11).
	* arch/arm/src/samdl: Fix DMA controller support.  From Matt Thompson
	  (2018-02-11).
	* arch/arm/src/samdl: Added experimental DMA support to SPI driver.
	  spi_exchange() uses a pair of DMA channels for TX and RX.  From Matt
	  Thompson (2018-02-11).
	* configs/stm32f103-minimum:  Add OLED SSD1306 support to
	  STM332F103-Minimum  From Alan Carvalho de Assis (2018-02-11).
	* drivers/lcd: Fix the default I2C address of SSD1306 OLED display (7- vs
	  8-bit addressing)  From Alan Carvalho de Assis (2018-02-11).
	* net/tcp:  Fixed bad return value handling in psock_tcp_send().  send()
	  expects psock_tcp_send() to return a negated errno value, not -1 with the
	  errno set (GN: I added same change for tcp_send_buffered.c which has the
	  same issue as tcp_send_unbuffered.c)  From Pelle Windestam (2018-02-13).
	* arm/arm/src/stm32:  Corrections to STM32 F4 I2C to restore
	  functionality.  From Alexander Oryshchenko (2018-02-13).
	* arm/arm/src/stm32:  Corrections to STM32 F4 I2C to fix the NORESTART
	  flag.  From Alexander Oryshchenko (2018-02-13).
	* drivers/sensors:  Added support for LIS3DH accelerometer sensor.  From
	  Matt Thompson (2018-02-13).
	* drivers/eeprom:  EEPROM driver for AT24xx compatible EEPROMs.  From
	  Sebastien Lorquet (2018-02-14).
	* configs/stm32f103-minimum: Add board support to MAX6675 Thermocouple
	  sensor  From Alan Carvalho de Assis (2018-02-14).
	* sched/signal: Remove SMP related logic in sig_dispatch.c.   This change
	  prevents from a deadlock in up_schedulesigaction.c where inter-CPU signal
	  handling is actually implemented.  arch/arm/src/armv7-m: Fix signal
	  handling for SMP. In previous implementation, signal handling for SMP was
	  incorrect.  Thus, for example, if an inter-CPU signal happened an incorrect
	  tcb was signaled and caused ASSERT().  This change fixes the issues and
	  works for both inter-CPU signal handling and signal handling on the same
	  CPU.  From Masayuki Ishikawa (2018-02-14).
	* arch/arm/src/armv7-a:  Port the SMP change by Masayuki Ishikawa to the
	  ARMv7-A family.  From Gregory Nutt (2018-02-14).
	* arch/xtensa/common:  Port the SMP change by Masayuki Ishikawa to the
	  Xtensa family.  From Gregory Nutt (2018-02-14).
	* configs/stm32f103-minimum: Remove CONFIG_NX_LCDDRIVER dependence from
	  stm32_ssd1306.c  From Alan Carvalho de Assis (2018-02-14).
	* drivers//sensors:  LIS3DH: Fix missing shift when writing output data
	  rate to register  From Matt Thompson (2018-02-14).
	* sched/clock: Replace critical section APIs with spin lock APIs in
	  clock_gettime.c.  This change will improve performance for SMP systems but
	  nothing changes for non-SMP systems.  In SMP mode, rtrtcb is not always at
	  the g_readytorun.head. This change removes DEBUGASSERT() to avoid this
	  condition.  From Masayuki Ishikawa (2018-02-15).
	* drivers/lcd:  lcd_framebuffer.c does not need to include board-specific
	  board.h.  From Gregory Nutt (2018-02-15).
	* include/lcd:  Eliminate a warning from an SSD1306 header file by adding a
	  forward reference to struct i2c_master_s.  From Sebastien Lorquet
	  (2018-02-15).
	* lcd/ft80x:  This commit adds an FTDI/BridgeTek FT80x driver.  It is
	  untested (I don't even have hardware yet and, hence, it is marked as
	  EXPERIMENTAL (2018-02-16).
	* arch/arm/src/stm32/stm32f33xxx_rcc.c:  A flash wait state configuration.
	  Flash latency must be fixed according to sysclk frequency. If this
	  operation is not done or done after PLL configuration, the STM32 fail to
	  continue boot operation if the frequency if greater than 24MHz according to
	  the board variable STM32_SYSCLK_FREQUENCY.  Tested on stm32f334-disco
	  board.  From Gwenhael Goavec-Merou (2018-02-17).
	* configs/stm32f746g-disco: Add stm32f746g-disco Ethernet configuration.
	  Add USART1 support (connected to the USB virtual serial port)  From Louis
	  Mayencourt (2018-02-19).
	* drivers/mtd:  mtd_config.c:  Add still more error handling (to detect bad
	  underlying flash implementations).  Remove MTD_ERASE that was erasing data
	  block instead of erase block.  This is a partial revert of 4f18b4.
	  Reported-by: Pascal Speck <iktek01@yahoo.com>
	* arch/arm/src/stm32l4:  stm32l4_flash: change flash programming to use
	  page buffer for unaligned writes.  From Juha Niskanen (2018-02-19).
	* arch/arm/src/stm32: stm32_flash.c: add progmem support for STM32L15XX
	  From Juha Niskanen (2018-02-20).
	* Added ECANCELED condition to DEBUGASSERT-s checking sem_wait result  From
	  Dmitriy Linikov (2018-02-20).
	* net/tcp:  Fixes hardfault when network goes done and network monitoring
	  is in place.  From Gianpaolo Ferroni Ariani (2018-02-22).
	* arch/arm/src/sam34:  Fix a typo resulting in duplicate names in DMAC bit
	  definitions.  From Gregory Nutt (2018-02-22).
	* net/tcp: tcp_send_[un]buffered.c:  Check routing table in
	  psock_send_addrchck().  Previously only ARP table was considered when
	  determining if the data will actually be sent.  From Juho Grundstrom
	  (2018-02-22).
	* net/tcp:  Generalize Juho Grundstrom's IPv4 change for IPv6 as well.
	  From Gregory Nutt (2018-02-22).
	* arch/arm/src/lc823450: Fix up_enable_irq() timing for I2S.  In previous
	  commit, I2S IRQ might be sometimes assigned to CPU1 when CONFIG_SMP=y.
	  This change fixes this issue.  Refactor timer driver.  Introduce
	  lc823450_timer.h and move lc823450_timerisr.c to lc823450_timer.c Add MTM
	  timer APIs for DVFS.  Introduce up_rtc_gettime() for CONFIG_RTC_HIRES.
	  Introduce idle time calculation in DVFS.  Also, DVFS autonomous mode based
	  on CPU idle time is supported.  NOTE: voltage control is still disabled.
	  From Masayuki Ishikawa (2018-02-23).
	* configs/lc823450-xgevk: Update defconfigs.   Enable RTC_HIRES instead of
	  RTC_DATETIME (audio/rndis).  Disable TCP_WRITE_BUFFERS and change
	  SCHED_LPWORKPRIORITY (rndis). Update SMP and DVFS related part.  From
	  Masayuki Ishikawa (2018-02-23).
	* net/icmpv6/icmpv6:  Eliminate warnings by correct the type uses to link
	  structure into lists.  From SP (2018-02-23).
	* configs/viewtool-stm32f107:  Add support for FT80X initialization.  Add
	  ft80x configuration that will eventually be used for testing the ft80x if I
	  ever receive hardware.  From Gregory Nutt (2018-02-24).
	* Fixed parsing of DNS response packets having compressed names ending with
	  pointer.  There were troubles parsing response packets which have
	  compression of QNAME/NAME field when only trailing part of the name (not
	  the whole name) is replaced with pointer to another part of the packet.
	  This commit fixes parsing of such packets.  Also I added checks to keep
	  parsing only in bounds of the read part of DNS response packet.  From
	  Dmitriy Linikov (2018-02-26).
	* arch/arm/src/stm32f7:  Backport RTC alarm setting changes from STM32L4.
	  Most notably this fixes RTC getting stuck issue when both alarms were used.
	  Root cause was writing RTC ISR register contents to RTC CR register.  From
	  Juha Niskanen (2018-02-27).
	* stm32_hrtim: add repetition support and fix enum overflow  From Mateusz
	  Szafoni (2018-02-27).
	* drivers/i2c and drivers/spi:  Fix compile if
	  CONFIG_DISABLE_PSEUDOFS_OPERATIONS, fix bad NULL checks  From Juha Niskanen
	  (2018-03-01).

7.25 2018-06-03 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/stm32/stm32f33xxx_adc.c:  Fix bug in RCC reset logic that
	  resets ADC1 configuration when both ADC1 and ADC2 are in use  From Mateusz
	  Szafoni (2018-03-02).
	* drivers/wireless/cc1101.c:  Driver improvements from from lihaichen
	  (2018-03-03).
	* Remove all usage of printf() from the OS.  That is not an acceptable
	  context for the use of an application-oriented interface that depends on a
	  task-specific file descriptor and C buffered I/O.  From Gregory Nutt
	  (2018-03-03).
	* stm32_hrtim: fix capture_get function, add software capture trigger, add
	  software reset trigger, add outputs polarization configuration  From
	  raiden00pl (2018-03-04).
	* Per OpenGroup.org, syslog -- and, hence, nonstandard vsyslog, and debug
	  wrappers -- does not return a value.  Rename _vsyslog to nx_vsyslog.  Use
	  internal nx_vsyslog in the few cases where a return value is required.
	  From Gregory Nutt (2018-03-04).
	* arch/srm/src/stm32f7:  Add CONFIG_RTC_PERIODIC support.  Also makes the
	  RTC lowerhalf more like in STM32L4.  From Juha Niskanen (2018-03-05).
	* drivers/i2c:  Add support for the pca9540bdp i2cmultiplexer.  From Giorgio
	  Groß (2018-03-05).
	* arch/arm/src/stm32:  Add support for the STM32F401xB and STM32F401xC
	  families.  From Gregory Nutt (2018-03-05).
	* drivers/power:  Add pm_unregister  From Juha Niskanen (2018-03-06).
	* arch/srm/src/stm32f7: add PM hooks to ADC, I2C and SPI.  From Juha
	  Niskanen (2018-03-06).
	* Makefile.unix:  Eliminate the spurious errors reported by 'make
	  savedefconfig'  From Gregory Nutt (2018-03-07).
	* drivers/net/phy_notify.c:  Use phy debug macros instead of net debug
	  macros.  ninfo() and nerr() are used a bit too much, so the console output
	  is difficult to read with network debug.  From Sebastien Lorquet
	  (2018-03-09).
	* drivers/lcd/ft80x:  ACTIVE host command appears to be formatted
	  differently than other host commands; Fix ROM CHIPID.  Appears to be
	  big-ending, BCD.  Fix some compile issues when debug features are
	  enabled.  From Gregory Nutt (2018-03-09).
	* drivers/lcd/ft80x:  Fix a typo that caused the driver to fail to recognize
	  the ft801 chip version. From Gregory Nutt (2018-03-11).
	* drivrs/leds:   Userled driver was using LCD debug output instead of LED
	  debug output.  From Sebastien Lorquet (2018-03-11).
	* net/tcp:  Add support for TCP Keepalive, add SO_KEEPALIVE socket option.
	  Adds socket options needed to manage TCP-keepalive and TCP state machine
	  logic to detect if that the remote peer is alive.  From Gregory Nutt
	  (2018-03-12).
	* arch/arm/src/stm32/usb: skip recipient check for descriptor related
	  requests  From Simon Piriou (2018-03-12).
	* net/tcp:  In tcp_input(), add the logic to detect, decode, and respond to
	  TCP Keep-Alive packets.  In tcp_timer(), fix some problems with the way
	  that TCP Keep-Alive probes were being formatted.  From Gregory Nutt
	  (2018-03-12).
	* stm32f103-minimum: add support for DFU bootloader  From Simon Piriou
	  (2018-03-12).
	* arch/arm/src/stm32/lowputc:  Fix uart glitch when lowputc is enabled..
	  From Simon Piriou (2018-03-12).
	* libc/time:  Add an implementation of clock()  From Gregory Nutt
	  (2018-03-13).
	* drivers/sensors:  Add support for Sensirion SHT2x humidity sensor  From
	  Juha Niskanen (2018-03-13).
	* drivers/serial/Kconfig:  Kconfig is too big, divide into Kconfig,
	  Kconfig-uart, Kconfig-usart, Kconfig-sci, Kconfig-16550.  More than one
	  MCU supports LPUARTs.  Add Kconfig-lpuart and remove MCU-specific LPUART
	  definitions.  Affects Kinetis and STM32L4.  From Gregory Nutt (2018-03-14).
	* libc/lzf:  Add Marc Alexander Lehmann's LIBLZF3.6 library  From Boris
	  Astardzhiev (2018-03-14).
	* configs/stm32f4discover/posix_spawn:  With recent changes, needs to enable
	  boardctl() w/symbol table support.  From Gregory Nutt (2018-03-16).
	* fs/craomfs:  Add CROMFS file system.  CROMFS is a commpressed, in-memory
	  read-only file system based on LZF.  From Gregory Nutt (2018-03-19).
	* sched/sched: Fix a deadlock in SMP mode.  Two months ago, I introduced
	  sched_tasklist_lock() and sched_tasklist_unlock() to protect tasklists in
	  SMP mode.  This change works well for HTTP audio streaming aging test with
	  lc823450-xgevk.  However, I found a deadlock in the scheduler when I tried
	  similar aging tests with DVFS autonomous mode where CPU clock speed
	  changed based on cpu load. In this case, call sequences were as follows.
	  To avoid this deadlock, I added sched_tasklist_unlock() when calling
	  up_cpu_pause() and sched_addreadytorun(). Also, added
	  sched_tasklist_lock() after the call.  Also added critical sections to
	  lib_filesem.c, mm_sem.c, and net_lock.c for SMP for SMP.  From Masayuki
	  Ishikawa (2018-03-20).
	* arch/arm/src/stm32l4:  Port 1wire driver from stm32.  From Juha Niskanen
	  (2018-03-20).
	* mm/iob/iob_copyin.c:  Fixed problem with send() ret value when using
	  nonblocking io over buffered tcp socket  From Dmitriy Linikov (2018-03-20).
	* tools/gencromfs.c:  Adds tools/gencromfs.c, a tool that can be used to
	  generate CROMFS file system images.  From Gregory Nutt (2018-03-20).
	* |arch/arm/src/stm32l4:  Add PM hooks to I2C, SPI and 1-wire  From Juha
	  Niskanen (2018-03-21).
	* drivrs/sensors/lis2dh:  Clear INT1 at SNIOC_WRITE_INT1THRESHOLD ioctl
	  From Jussi Kivilinna (2018-03-21).
	* drivers/sensors/sht21:  Change I2C_TRANSFER return value so that it return
	  on zero on success, not the count of bytes transferred.  From Juha
	  Niskanen (2018-03-22).
	* i2c/i2c_master.h:   Change incorrect comment about I2C_TRANSFER return
	  value to indicate that the method returns zero on success rather than the
	  number of bytes transferred.  From Juha Niskanen (2018-03-22).
	* configs/: Remove configurations using canutils/libuavcan and
	  examples/uavcan.  libuavcan has not built for a year or so.  The basic
	  problem is that as NuttX advances, the old frozen version of libuavcan has
	  become absolute because it violates the portable POSIX OS interface.  No
	  one is maintaining the port so there is no alternative but to remove it.
	  From Gregory Nutt (2018-03-23).
	* STM32, STM32L4:  Add one bit read and write to 1-wire interface.  This is
	  needed for devices that require single bit timeslot generation and for
	  1-Wire search algorithm triplets.  From Juha Niskanen (2018-03-23).
	* arch/arm/src/imx6:  Bring in a few i.MX6 fixes that were committed on the
	  i.MX RT branch.  From Gregory Nutt (2018-03-23).
	* configs/:  Add definition of strip to many Make.defs files.  From Gregory
	  Nutt (2018-03-25).
	* arch/arm/src/nrf52:  Initial support for the NRF52 include UART and GPIO
	  support.  From Janne Rosberg (2018-03-26).
	* Per Matias Edlund:  I recently used the tcflush function and found that it
	  failed with ENOTTY. The reason is that the TCFLSH case in the function
	  uart_ioctl in the file drivers/serial/serial.c does not update the ret
	  value."  On success, the TCFLSH IOCTL logic needs to explicitly set the
	  return value (ret) to zero.  From Gregory Nutt (2018-03-26).
	* netdb: Fix boundary conditions in dns_recv_response().  Fix typos in
	  include/nuttx/net/dns.h  From Masayuki Ishikawa (2018-03-27).
	* configs/nrf52-pca10040:  Add support for the NRF52-PCA10040 board
	  including LEDs and buttons  From Janne Rosberg (2018-03-27).
	* arch/arm/src/stm32:  In case of PHY failure, usually because of the lack
	  of 25/50 MHz REFCLK input, the Ethernet block would lock up in a while
	  loop waiting for readiness, which will never happened.  This prevented the
	  board from starting at all in the case of a PHY failure.  This commit adds
	  a retry loop to avoid bricking the board if the Ethernet block is unable
	  to start.  From Sebastien Lorquet (2018-03-27).
	* mac802154: Adds basic support for RX-ENABLE.request primitive  From
	  Anthony Merlino (2018-03-28).
	* mac802154: Adds ackreq flag to TX descriptor for use by radio driver.  The
	  radio layer is responsible for a full "transaction". Because of
	  differences in radio capabilities, the radio must be responsible for the
	  handling of acks and retransmissions. This commit simply passes the ackreq
	  meta-data flag along to the radio.  Also Fixes bug where primitive was
	  freed when it shouldn't have been, causing double free call.  From Anthony
	  Merlino (2018-03-28).
	* wireless/bluetooth:  Bring in the Bluetooth stack from the Intel/Zephyr
	  arduino101_firmware_source-v1.tar package.
	* drivers/bluetooth:  Adds re-architected version of the Bluetooth UART
	  driver from the Intel/Zephyr arduino101_firmware_source-v1.tar package.
	  From Gregory Nutt (2018-03-29).
	* wireless/bluetooth and include/nutt/net:  Add support for Bluetooth IOCTL
	  commands.  From Gregory Nutt (2018-03-30).
	* net/bluetooth:  Adds basic support for AF_BLUETOOTH sockets.  From Gregory
	  Nutt (2018-03-31).
	* arch/arm/src/tiva: Fix compilation errors on Tiva ADC code when ADC is
	  enable.  From Vinicius Maciel (2018-04-01).
	* drivers/wireless/bluetooth:  Add a NULL device to support some very low
	  level testing on the Simulator.  From Gregory Nutt (2018-04-03).
	* configs/sim:  Add a configuration that will support some limited testing
	  of the Bluetooth stack.  From Gregory Nutt (2018-04-03).
	* Change all Sony related copyright to conform with our company's internal
	  rules.  From Masayuki Ishikawa (2018-04-04).
	* drivers/wireless/cc3000:  Eliminate support for the CC3000 wireless part
	  because it doesn't use the USRSOCKET.  From Alan Carvalho de Assis
	  (2018-04-04).
	* configs/spark:  Removes Spark board configuration.  Still available in the
	  Obsoleted repository.  If there is no CC3000 support, then there is no
	  purpose in supporting the Spark either.  From Gregory Nutt (2018-04-04).
	* drivers/1wire:  Add 1-wire subsystem and ds28e17 driver  From Juha
	  Niskanen (2018-04-04).
	* stm32/Kconfig:  Add ADC injected channels configuration; stm32f334-disco:
	  Add buck/boost converter example configuration  From Mateusz Szafoni
	  (2018-04-04).
	* drivers/mtd/w25.c:  Fix w25_cacheflush sector bug.  From lihaichen
	  (2018-04-04).
	* arch/arm/src/stm32 and stm32l4:  In 1wire driver, do not write useless
	  WRITEBIT zero return value to const buffer  From Juha Niskanen (2018-04-04).
	* drivers/sensors:  Add LSM330 SPI and ADXL372 drivers along with the
	  cluster driver infrastructure.  From Bob Feratich (2018-04-07).
	* drivers/power/motor.c:  Add generic upper-half motor driver  From Mateusz
	  Szafoni (2018-04-09).
	* drivers/sensors/max31855: Add multiple max31855 sensors feature and
	  support for bambino-200e and stm32f4discovery  From Tiago Almeida
	  (2018-04-09).
	* arch/arm/include/tiva and configs/cc3200-launchpad:  Remove all support
	  for the CC3200 and CC3200-Launchpad.  This was a port that was started but
	  never completed.  What good is partial CC3200-Launchpad board support with
	  no wireless support?  From Gregory Nutt (2018-04-09).
	* drivers/sensors/apds9960.c:  Fix APDS9960 work queue BUG found by Kyle
	  Lei  From Alan Carvalho de Assis (2018-04-10).
	* tools/uncrustify.cfg:  An initial cut at an uncrustify C formatting
	  script.  From Gregory Nutt (2018-04-11) Updated, corrected, and verified.
	  From Bob Feretich (2018-04-11).
	* tools/nxstyle.c;:  Add check for blank lines before and after single line
	  comments.  From Bob Feretich (2018-04-11).
	* arch/arm/src/:  Problem: stm32f30xx hangs waiting for LSE to initialize.
	  Reason for hang is that operation of setting LSE_ON does not take effect
	  because there is no clock on PWR peripheral.  this is initialized later in
	  the code  From Michał �yszczek (2018-04-11).
	* arch/arm/src/imxrt:  Brings in basic support for the i.MX RT 1050
	  'crossover' SoC.   Includes timer and UART support.  This port was the
	  joint effort of Janne Rosberg, Ivan Ucherdzhiev, and myself.  I give
	  credit to Ivan for the kill because he is the one to held on to the end.
	  From Ivan Ucherdzhiev (2018-04-12).
	* sched/sched:  Change ordering of round-robin time slice check
	  (sched_process_scheduler()) and processing of wdog timers (wd_timer()).
	  wd_timer()'s callback function can change current running task and, hence,
	  must be done after the time slice check.  The time slice check will
	  decrement the currently running task's time slice allotment.  If such a
	  context switch occurs, then the newly started task will lost one could of
	  that allotment before it even has a chance to run.  From EunBong Song
	  (2018-04-13).
	* arch/arm/src/stm32:  Adds a Bluetooth HCI UART lower half driver for the
	  STM32.  From Gregory Nutt (2018-04-13).
	* configs/imxrt1050-evk:  This commit adds support for booting from the on
	  board HYPER Flash.  From Ivan Ucherdzhiev (2018-04-13).
	* configs/stm32fdiscovery:  Add support in bringup logic to initialize the
	  HCI UART and register the HCI UART network device.  From Gregory Nutt
	  (2018-04-13).
	* fs/smartfs:  Fix a hardfault in SmartFS.  Problem occurred when opening a
	  file with O_CREAT (only) when the file arelready exists but has a size of
	  zero.  From Michał �yszczek (2018-04-14).
	* arch/arm/src/xmc4:  Add SPI support for Infineon XMC45xx microcontroller
	  From Alan Carvalho de Assis (2018-04-14).
	* fs/mount:  Fix wrong size reported by df -h.  Reason is that size in bytes
	  is calculated always on uint32_t types and cards bigger than 4GB will
	  overflow uint32_t type. Solution is to use uint64_t where possible.  From
	  Michał �yszczek (2018-04-14).
	* tools/mkromfsimg.sh:  Include an option in mkromfsimg.sh to ignore
	  FAT/RAMDISK. This permits you to build tiny systems with ROMFS but with
	  the rather large FAT FS support.  From Alan Carvalho de Assis (2018-04-14).
	* arch/arm/src/imxrt:  Corrects error in serial interrupts and baud setup.
	  Now the basic IMXRT1050-EVK port is ready. The console is working.  From
	  Ivan Ucherdzhiev (2018-04-17).
	* arch/arm/src/imxrt:  Add power management hooks  From Gregory Nutt
	  (2018-04-17).
	* net/sixlowpan:  Fix a nasty, byte-ordering/endian-ness problem.  The root
	  cause has been found and corrected.  And a half dozen or so bandaid fixes
	  were reverted.  From Gregory Nutt (2018-04-17).
	* arch/arm/include/tms570, arm/src/armv7-r, and arm/src/tms570:  Adds
	  support for the TMS570LS3137ZWT and corrects several ARMv7-R and TMS570
	  issues  From Gregory Nutt (2018-04-18).
	* configs/tms570ls31x-usb-kit:  Adds support for the TI Hercules TMS570LS31x
	  USB Kit  From Ivan Ucherdzhiev (2018-04-18).
	* drivers/ieee802154/xbee:  Adds a timeout to send logic to handle case
	  where XBee module fails to respond to a Transmit request with a Transmit
	  Status  From Anthony Merlino (2018-04-19).
	* arch/arm/src/tiva:  Allow building of Tiva platform with no serial
	  console.  From Dmitry Sharihin (2018-04-19).
	* drivers/net:  Add TAP (network bridge) mode to tun.c.   In previous
	  implementation, TAP mode did not handle a packet correctly. Also, the
	  driver did not set the link layer type and could not assign the interface
	  name. This change fixes such issues and supports TAP mode correctly.  From
	  Masayuki Ishikawa (2018-04-20).
	* arch/arm/src/nrf52:  Add watchdog timer drivers.  Includes significant
	  updates from Alan Carvalho de Assis <acassis@gmail.com>  From Levin Li
	  (2018-04-20).
	* configs/nrf52-pca10040:  Add support for starting the watchdog timer on
	  the nRF52.  From Alan Carvalho de Assis (2018-04-20).
	* net/tcp: Extended support for sending to non-blocking tcp sockets.  From
	  Pelle Windestam (2018-04-20).
	* configs/nrf52-pca10040:  Add a configuration for testing the watchdog
	  timer.  From Alan Carvalho de Assis (2018-04-20).
	* arch/arm/src/nrf52: nrf52_wdt_initialize() should return a success/fail
	  indication.  From Gregory Nutt (2018-04-20).
	* arch/arm/src/stm32:  Enable DMA for SPI on stm32f30xxx MCUs.  From Michał
	  �yszczek (2018-04-20).
	* configs/imxrt1050-evk:  Add logic to support user LED  From Jake Choy
	  (2018-04-20).
	* fs/vfs:  Fix negative errno set in fs_open.c  From Michał �yszczek
	  (2018-04-20).
	* /arch/arm/src/lpc17xx: Fix USB device endpoint allocation bookkeeping.
	  From Michael Jung (2018-04-21).
	* configs/stm32f4discovery:  Add MAX7219 support to STM32F4Discovery board
	  From Alan Carvalho de Assis (2018-04-21).
	* configs:  Review all implementations of board_lcd_initialize().  The NuttX
	  convention is that all internal functions that return errors as an 'int'
	  must return a negated errno value on failure and a non-negative value on
	  success.  Most were right but eight of them had cloned logic that returns
	  1 on success and zero on failure... both of which are interpreted as
	  success by the caller since they are non-negative.  From Gregory Nutt
	  (2018-04-21).
	* Makefile: Add support for nconfig frontend for 'make nconfig'  From Michał
	  �yszczek (2018-04-22).
	* arch/arm/sc/lpc17xx:  Freeing endpoints should be set the same allocations
	  as when endpoint was allocated.  From Gregory Nutt (2018-04-23).
	* configs/imxrt1050-evk:  Add procfs auto-mount support in imxrt_bringup.c.
	  From Ivan Ucherdzhiev (2018-04-24).
	* drivers/1wire:  Add PM hooks and unlink support to sht21 sensor (allowing
	  hot-swappable I2C bus from 1-wire converter).  Unlike most other unlink
	  implementations in NuttX drivers, this one does not allow any I2C
	  operations after unlink, making it possible to deallocate the I2C bus.
	  From Juha Niskanen (2018-04-24).
	* configs/ stm32f746g-disco.  Add clang support to stm32f746g-disco board
	  From Goran Mekić (2018-04-24).
	* net/udp:  Fix several issues using connected UDP sockets:  sendto() should
	  not accept an address.  Normally send() should be used with connect UDP
	  sockets instead.  recvfrom() is no longer necessary.  recvfrom() and
	  poll() should not reset to accept any addresses but should, instead, only
	  accept inputs and events from the connected remote peer.  On of these
	  issues was noted by �桂� <liguiding@pinecone.net>.  Changes were made as
	  summarized here:
	  http://www.masterraghu.com/subjects/np/introduction/unix_network_programming_v1.3/ch08lev1sec11.html
	  From Gregory Nutt (2018-04-25).
	* include/nuttx/wireless:  Add a setbaud() method to the HCI UART lower half
	  interface that can be used to change the default BAUD selection.
	  arch/arm/src/stm32:  Implement the setbaud() method for the STM32 HCI
	  UART.  From Gregory Nutt (2018-04-25).
	* arch/arm/src/imxrt:  Minor repartitioning to account for the fact that the
	  GPIO5 base address is not contiguous with the GPIO1-4 base addresses.
	  From Gregory Nutt (2018-04-25).
	* arch/arm/src/imxrt/chip:  Add some missing definitions for GPIO5  From
	  Gregory Nutt (2018-04-25).
	* fs/vfs:  Added support for checking if a descriptor is a socket in
	  fstat().  From Pelle Windestam (2018-04-26).
	* drivers/wiresless/ieee80211:  Correct some initialization problems with
	  BCM43362 chip.  Adds BCM43428 support.  arch/arm/src: Add support for SDIO
	  card to SDIO driver.  From hhuysqt (2018-04-26).
	* arch/arm/src/imxrt:  Add LIBCXX test configuration for IMXRT.  From
	  Gregory Nutt (2018-04-26).
	* configs/photon:  Configurations the use the SDIO card interface must
	  support CONFIG_STM32_SDIO_CARD.  From Gregory Nutt (2018-04-26).
	* arch/or1k/src and configs/or1k.  Adds basic architectural support for the
	  OpenRISK mor1kx architecture.  The initial commit was verified on a Qemu
	  simulation but is otherwise untested.  From Matt Thompson (2018-04-26).
	* configs/stm32f429i-disco: Add a LittlevGL configuration for
	  stm32f429i-disco  From seyyah (2018-04-26).
	* net/udp:  Correct an error introduce in recent fixes for UDP connected
	  sockets.  The interaction between psock_udp_send() and psock_udp_sendto()
	  was perverse:  It should always pass a NULL destinatino address.  From
	  Gregory Nutt (2018-04-26).
	* Cosmetic changes to README and to comments.  From Gregory Nutt
	  (2018-04-26).
	* arch/arm/include/nrf52:  All nRF52 IRQs above NRF52_IRQ_TEMP were wrong.
	  From Alan Carvalho de Assis (2018-04-26).
	* net/udp:  Fix a backward conditional test added in commit
	  434da18cd71ae667c801f41291fbbc205b24320b.  From Gregory Nutt (2018-04-27).
	* arch/arm/src/imxrt:  IMXRT LPUART Clock enable fix.  From Ivan Ucherdzhiev
	  (2018-04-27).
	* fs/vfs and net/udp:  Repartition logic of commit
	  0c963449d6e8f5f8b2dfe96e9de3116633a3749a, moving into net/udp.  Add
	  support to handle connected UDP sockets.  The correct 'optimal blksize' to
	  return is the MSS.  The MTU is always too big.  From Gregory Nutt
	  (2018-04-27).
	* arch/arm/src/imxrt:  Add IOMUX implemention for GPIO5.  From Jake
	  (2018-04-27).
	* net/udp:  Remove an unused variable warning.  Add some comments.  From
	  Gregory Nutt (2018-04-27).
	* arch/arm/src/kinetis: USB device fixes:  Use correct CONFIG OTG control,
	  Fix interrupt storm when cable is disconnected.  The DM, DP state were
	  incorrect because the pulldowns were not enabled.  Also the pending
	  asynchronous resume interrupt needed to be re-armed after the suspend is
	  in effect. This is now done in the isr.  From David Sidrane (2018-04-28).
	* arch/arm/src/tiva:  Add TERMIOS IOCTL support to the Tiva serial driver.
	  From Dmitry Sharihin (2018-04-28).
	* configs/nucleo-l476rg:  Add support to Nokia LCD PCD8544 on nucleo-l476rg
	  From Alan Carvalho de Assis (2018-04-28).
	* configs/nucleo-l476rg:  Add nxdemo configuration to nucleo-l476rg using
	  PCD8544  From Alan Carvalho de Assis (2018-04-28).
	* Makefile.unix:  There is a sort command in the 'make savedefconfig' file.
	  I found that sort behaves differently on different platforms based on the
	  environment variable LC_ALL.  Now, Makefile.unix will force LC_ALL=C just
	  for the sort command so that we can all generate equivalent defconfig
	  files.  From Gregory Nutt (2018-04-29).
	* arch/arm/src/tiva:  Implements an EEPROM driver in compliance with MTD
	  driver as provided by NUTTX for TM4C1294.  The EEPROM driver currently
	  supports only two functionalities - read bytes(multiple of 4) and write
	  bytes (multiple of 4).  From Shirshak Sengupta (2018-04-29).
	* arch/arm/src/tiva:  Implemented Flash CONFIG_MTD_BYTE_WRITE for TM4c1294.
	  Implemented the tiva_write function which will write an arbitrary number
	  of bytes to flash (in multiple of 4).  From Shirshak Sengupta (2018-04-29).
	* progmem interface: Discern r/w and erase page sizes.  Introduce new
	  up_progmem_erasesize architecture API to be able to communicate the
	  read/write page size independently from erase page size.  Implement
	  up_progmem_erasesize for all architectures that already support progmem,
	  assuming that for those architectures the sizes of both read/write and
	  erase pages are identical.  From Michael Jung (2018-05-01).
	* arch/arm/src/include/kinetis and src/kinetis:  Add architecture support
	  for the Kinetis K28F.  From Gregory Nutt (2018-05-01).
	* arch/arm/src/imxrt: This commit fixes more issues with the i.MX RT GPIO
	  IRQ.  Add check for interrupt mask register before dispatching ISR. The
	  GPIO_ISR bits are set independent of the GPIO_IMR bits. Fixed a range
	  check for extint in function imxrt_irqinfo().  From Jake Choy (2018-05-01).
	* configs/imxrt1050-evk:  This commit adds support for the imxrt button.
	  From Jake Choy (2018-05-01).
	* arch/arm/src/lpc17xx: This commit adds a configurable option to allow
	  using a part of LPC17xx's internal flash memory as a Memory Technology
	  Device via NuttX' mtd_progmem infrastructure. Tested with LPC1769.  From
	  Michael Jung (2018-05-01).
	* arch/arm/src/imxrt:  Add GPIO5 IRQ support.  From Jake Choy (2018-05-02).
	* configs/freedome-k28f.  Adds support for the Kinetis Freedom-K28F board.
	  From Gregory Nutt (2018-05-02).
	* fs/nfs/rpc_clnt.c:  Commit 091e3f7 broke the NFS client.  sendto() can
	  (correctly) no longer be used with a connected UDP socket.  In that case,
	  send() must be used instead.  From Michael Jung (2018-05-02).
	* drivers/rgbled: Adds support for multichannel PWM (multiple PWM channels
	  on a single timer)  From Anthony Merlino (2018-05-02).
	* drivers/sensors: Adds support for INA3221 power sensor. This has a 3
	  channel bus/shunt voltage pairs.  From Anthony Merlino (2018-05-02).
	* configs/photon: Adds RGB led support  From Anthony Merlino (2018-05-02).
	* arch/arm/src/nrf52:  Add nRF52 Flash PROGMEM support  From Alan Carvalho
	  de Assis (2018-05-04).
	* configs/freedom-k28f:  The NSH configuration is now functional on the
	  freedom-k28f board.  Also fixes corrects the active logic level for the
	  RGB LED.   arch/arm/src/kinetis/chip:  Fixes an error in vector
	  configuration.  From Gregory Nutt (2018-05-05).
	* configs/freedom-k28f:  If drivers/leds/rgbled.c is enabled, then treat the
	  board as though it had no discrete LEDs.  From Gregory Nutt (2018-05-05).
	* arch/arm/src/lpc17xx:  Add support for ARMv7-M run time stack checking on
	  NXP LPC17xx MCUs based on CONFIG_ARMV7M_STACKCHECK. Basically copied from
	  stm32.  From Michael Jung (2018-05-06).
	* arch/arm/src:  All ARM and MIPS architectures now support
	  CONFIG_ARCH_IDLE_CUSTOM  From Gregory Nutt (2018-05-07).
	* drivers/mtd/mtd_config.c: mtdconfig_register() returned OK instead of
	  -ENOMEM on failed malloc  From Michał �yszczek (2018-05-08).
	* configs/teensy-3.x/usbnsh:  Remove CONFIG_USBDEV_DUALSPEED from
	  configuration.  Hardware supports only FS.  From Gregory Nutt (2018-05-09).
	* libc/unistd:  Initial, minimal implementation of sysconf().  Only
	  sufficient to support the functionality of less standard
	  getdtabilesize().  From Michael Jung (2018-05-10).
	* Documentation/NuttShell.html:  Document the mkfatfs the -r option which
	  can be used to specify the number of entries in the FAT12/FAT16 root
	  directory.  From Gregory Nutt (2018-05-11).
	* LibTargets.mk, tools/Config.mk:  Drop executable bit on installed
	  libraries. The rules to install libraries under lib/ were modified to use
	  mode 0644 instead of the default 0755.  From Andrey Zabolotnyi (2018-05-12).
	* arch/arm/src/stm32: Add internal pull-up option for SDIO pins (also picks
	  up an unrelated change to a README.txt file)  From Alan Carvalho de Assis
	  (2018-05-12).
	* arch/arm/src/kinetis + SDHC configs:  Make Kinetis SDHC pullups work the
	  same as the STM32 SDIO pullups  From Gregory Nutt (2018-05-12).
	* net/udp: Resolve race condition in connection-less UDP sockets with
	  read-ahead buffering.  In connection-mode UDP sockets, a remote address is
	  retained in the UDP connection structure.  This determines both there
	  send() will send the packets and which packets recv() will accept.  This
	  same mechanism is used for connection-less UDP sendto:  A temporary remote
	  address is written into the connection structure to support the sendto()
	  operation.  That address persists until the next recvfrom() when it is
	  reset to accept any address.  When UDP read-ahead buffering is enabled,
	  however, that means that the old, invalid remote address can be left in
	  the connection structure for some time.  This can cause read-ahead buffer
	  to fail, dropping UDP packets.  Shortening the time between when he remote
	  address is reset (i.e., immediately after the sendto() completes) is not a
	  solution, that does not eliminate the race condition; in only makes it
	  smaller.  With this change, a flag was added to the connection structure
	  to indicate if the UDP socket is in connection mode or if it is
	  connection-less.  This change effects only UDP receive operations:  The
	  remote address in the UDP connection is always ignored if the UDP socket
	  is not in connection-mode.  No for connection-mode sockets, that remote
	  address behaves as before.  But for connection-less sockets, it is only
	  used by sendto().  From Gregory Nutt (2018-05-13).
	* include/sys:  Add resource.h  From Gregory Nutt (2018-05-13).
	* rgbled: Fixes led issues caused by uninitialized memory with
	  CONFIG_RGBLED_MULTICHAN.  The uninitialized pwm_info_s struct caused a
	  rogue channel to be started causing errros in the pwm driver  From Anthony
	  Merlino (2018-05-14).
	* arch/arm/src/imxrt/chip:  Add pin multiplexing header files.  From Gregory
	  Nutt (2018-05-14).
	* configs/nucleo-l452re:  Add buttons example  From Juha Niskanen
	  (2018-05-15).
	* arch/arm/src/imxrt/imxrt_serial.c:  Fix some interrupt instabilities; must
	  be in a critical section when modifying serial interrupts.
	  configs/imxrt1050-evk/nsh/defconfig:  Use the BASEPRI register to
	  enable/disable interrupts; enable the PROCFS file system.  From Gregory
	  Nutt (2018-05-15).
	* arch/arm/src/imxrt:  Add missing support for the Cortex-M7 caches;
	  configs/imxrt1050-evk:  Enable I- and D-Caches in the nsh configuration.
	  Calibrate the delay loop.  Add support for the on-board LED.  From Gregory
	  Nutt (2018-05-15).
	* arch/arm/src/imxrt:  Corrects some IOMUX controls.  From Jake Choy
	  (2018-05-15).
	* net/sixlowpan:  Preserve big-endian (network order) when uncompressing
	  address.  From Anthony Merlino (2018-05-15).
	* arch/arm/src/imxrt/chip:  Add DMA channel assignments.  From Gregory Nutt
	  (2018-05-15).
	* arch/arm/src/stm32f7:  Add support for the second SDMMC device.  The
	  second SDMMC device was already supported but the clock was never
	  enabled.  This fixes that.  From William Douglas (2018-05-15).
	* arch/arm/src/imxrt:  Add eDMA support (unverified).  From Gregory Nutt
	  (2018-05-16).
	* net/sixlowpan: TCP send should have PSH and ACK flags set when sending.
	  This matches the standard network (Ethernet) TCP send logic.  From Anthony
	  Merlino (2018-05-17).
	* net/udp: Recent changes to UDP in order to correct problems with UDP
	  connection mode introduced a new bug:  The 'to' address passed to sendto()
	  must now be NULL in connection mode.  But there are errors because there
	  was one place where the 'to' address was still being used.  This commit
	  adds logic to first check for UDP connection mode.  If the UDP socket is
	  connected, then the NULL 'to' address is ignored and saved connection
	  address is used instead.  From Gregory Nutt (2018-05-17).
	* arch/arm/src/stm32:  Added Vbat measurement to adc driver for STM32F20xx
	  and STM32F4xxx.  As with the MCU temperature and VREFINT measurement, this
	  change requires user to enable the corresponding channel first.  For Vbat
	  channel the ioctl cmd is IO_ENABLE_DISABLE_VBAT_CH, and its arg should be
	  a pointer to bool which must be true to enable and false to disable the
	  Vbat channel.  Moreover, since Vbat input contains a built-in voltage
	  divider, it is highly suggested to disable Vbat input channel after
	  measurement is done in order to prevent battery drain through the
	  divider.  From Dmitriy Linikov (2018-05-18).
	* configs/stm32l1discovery:  Add support for the STM32L152RCT6 version.
	  From Gregory Nutt (2018-05-18).
	* configs/stm32f4discovery/audio: Add board configuration for CS43L22 audio
	  example.  From Alan Carvalho de Assis (2018-05-19).
	* drivers/lcd and configs/olimex-lpc1766stk:  Remove support for the
	  Nokia6100 LCD.  That LCD uses a 9-bit SPI interface (the 9th bit being the
	  command/data bit that is normally a discrete).  That communication was
	  never successfully integrated.  I now believe that it would would require
	  some special support from the low-level, MCU SPI driver to manage that 9th
	  bit.  The deleted code is still available in the Obsoleted repository in
	  the nuttx/drivers/lcd, nuttx/configs/olimex-lpc1766stk, and Patches
	  directories.  From Gregory Nutt (2018-05-19).
	* arch/arm/src/lpc17xx/lpc17_usbdev.c:  Fix loss of RX initiatives.  USB
	  bulk endpoints are double buffered on LPC17xx MCUs.  This means that up to
	  two packets might be received on an OUT endpoint that can not be handled
	  immediately if the receive request queue is empty.  Thus, rxpending must
	  be a counter not a boolean flag.  From Michael Jung (2018-05-20).
	* configs/imxrt1050-evk/src:  Add support for on-board NOR FLASH boot.  From
	  Ivan Ucherdzhiev (2018-05-21).
	* fs/fat: In fs_stat(), when stat'ing the root directory, avoid calculating
	  the address of the root directory entry.  The calculation is bogus (but
	  not harmful) because the root directory does not have a directory entry.
	  Noted by Boris Astardzhiev.  From Gregory Nutt (2018-05-23).
	* fs/fat:  Avoid calculating the bogus directory entry address for the FAT
	  root directory (since it has no directory entry).  This change should have
	  no effect, other than making the logic clearer.  From Boris Astardzhiev
	  (2018-05-24).
	* configs/indium-f7:  Removes support for the Indium-F7 board.  This was
	  done for two reasons:  (1) The board support was just clone of the
	  Nucleo-144 board support with naming changes.  There has been no support
	  and no further development for the board support.  (2) There does not seem
	  to be any available Indium-F7 board available to the public anywhere on
	  the internet.  There is not even a reference to the board on the
	  rafresearch.com web stie.  Gotta go.  Its in the way.  From Gregory Nutt
	  (2018-05-24).
	* arch/arm/src/imxrt:  Add Ethernet driver.  From Jake Choy (2018-05-25).
	* arch/arm/src/imxrt:  Add cache operations to permit the Ethernet driver to
	  work with the D-Cache enabled, at least in write-through mode.  Add
	  support for PHY interrupts and PHY IOCTLs.
	* configs/imxrt1050-evk/netnsh/defconfig:  Disable LED support because pins
	  conflict with PHY.  Enable device statistics.  Enable NSH ifup and ifdown
	  commmands.  Add an NSH configuration for testing Ethernet.  From Gregory
	  Nutt (2018-05-25).
	* configs/xmc4500-relax: Add board support for SPI  From Alan Carvalho de
	  Assis (2018-05-26).
	* configs/olimex-stm32-p407:  Add a zmodem test configuration.  From Gregory
	  Nutt (2018-05-26).
	* drivers/serial:  Add a timeout to uart_tcdrain().  Even if tcflush() is
	  used to discard buffered data, the close() can still hang if (a) hardware
	  flow control is enabled, (b) CTS == 1, and (c) there is data stuck in the
	  hardware Tx FIFO.  tcflush() does not currently clear the MCU serial
	  drivers' hardware Tx FIFOs.  This is a workaround for that.  From Gregory
	  Nutt (2018-05-27).
	* Build system:  Remove fixed lib/ subdirectory and its content.  Replace
	  with new directory called staging/ that is created dynamically when
	  building and removed when 'make clean' is done.  This both improves the
	  name and eliminates a garbage directory from the repository.  From Gregory
	  Nutt (2018-05-29).
	* Build system:  Move all build-related files (except the top-level
	  Makefile) into the tools/ sub-directory.  This really cleans up the
	  top-level directory.  From Gregory Nutt (2018-05-29).
	* libs/:  This commit moves all of the libraries under a common directory
	  called libs/ (libc, libnx, and libxx).  This most certainly break libcxx
	  for now.  From Gregory Nutt (2018-05-29).
	* libs/libdsp:  Adds DSP support library.  From Mateusz Szafoni (2018-05-30).
	* arch/arm/src/kinetis:  In kinetis_lowputc.c, fix esBRFA calculation
	  effecting baudrate.  Previous BRFA was not cleared and or-ed into new
	  BRFA, hence, buadrate was wrong.  Where Baud Rate Fractional Divisor
	  (BRFD) UART baud rate = clock / (16 * (SBR + BRFD))  From David Sidrane
	  (2018-05-30).
	* arch/arm/src/kinetis:  In kinetis_lowputc.c, fixed parity settings.
	  Kinetis UART must be placed in 9 bit mode (M=1) with when 8 bit data with
	  parity is required. If left in 8 bit mode (M=0) with parity then D7 of the
	  TX/RX register becomes parity bit.  Hence what is called 9-bit or 8-bit
	  Mode Select is a misnomer.  8 bit mode when parity is enabled is realy 7
	  bit with parity.  From David Sidrane (2018-05-30).
	* arch/sim:  Various fixes necessary to build the simulator under MSYS2.
	  From Gregory Nutt (2018-05-31).
	* Makefile: The clean_context target needs to invoke a corresponding
	  clean_context target in the apps/Makefile in order to remove linkages
	  From Gregory Nutt (2018-05-31).
	* configs/stm32f4discovery:  Add Load Modules flags to STM32F4Discovery
	  board  From Alan Carvalho de Assis (2018-06-01).
	* libs/libc/modlib/modlib_verify.c:  Fix backward test for an error.  From
	  Gregory Nutt (2018-06-01).
	* Change all references from OSX to macOS  From Gregory Nutt (2018-06-01).
	* tools/sethost.sh:  Add support for macOS  From Gregory Nutt (2018-06-01).
	* configs/olimex-stm32-p407:  Add the module configuration.  From Gregory
	  Nutt (2018-06-01).
	* configs/xmc4500-relax/src: Call xmc4_spidev_initialize() in xmc4_boot.c.
	  From Alan Carvalho de Assis (2018-06-02).
	* configs/stm32f4discovery:  Add a module configuration for testing the
	  kernel module example with the STM32F4Discovery board.  From Alan Carvalho
	  de Assis (2018-06-02).

7.26 2018-09-08 Gregory Nutt <gnutt@nuttx.org>

	* tools/kconfig2html.c:  Due to new usage, tool needs to be able to
	  handle configuration files with names other than Kconfig.  From
	  Gregory Nutt (2018-06-03).
	* arch/arm/src/stm32:  Added progmem interface support for STM32F20XX
	  From Dmitriy Linikov (2018-06-05).
	* arch/arm/src/stm32/chip/stm32_flash.h:  Add register definitions for
	  F1 parts that have dual banked FLASH.  From Dmitriy Linikov
	  (2018-06-05).
	* arch/arm/src/stm32: STM32 FLASH logic has reached a limit in
	  complexity and, hence, needs to be divided into multiple C files of
	  lower complexity.  From Gregory Nutt (2018-06-05).
	* configs/lc823450-xgevk: Add loopback test for digital MIC on lc823450
	  via i2schar driver.  From Masayuki Ishikawa (2018-06-05).
	* arch/arm/src/stm32: Implement support for STM32 F1 banked FLASH  From
	  Gregory Nutt (2018-06-05).
	* arch/arm/src:  Change ASSERT macros to DEBUGASSERT.  From Juha
	  Niskanen (2018-06-06).
	* stm32f334-disco/buckboost:  Use a PID controller from libdsp  From
	  Mateusz Szafoni (2018-06-06).
	* arch/:  Make sure the up_irq_enable() is available on all
	  architectures.  From Gregory Nutt (2018-06-06).
	* Based on a change recommended by Mark Shulte:
	  Signal handlers maybe run with interrupts enabled or disabled,
	  depending on how the task the received the signal was blocked. (i.e.:
	  If sem_wait() is called, then we disable interrupts, then block the
	  currently running task). This could be dangerous, because user code
	  would be running with interrupts disabled.
	  This change forces interrupts to be enabled in up_sigdeliver() before
	  executing the signal handler calling up_irq_enable() explicitly.
	  This is safe because, when we return to normal execution, interrupts
	  will be restored to their previous state when the signal handler
	  returns.  From Gregory Nutt (2018-06-06).
	* arch/arm/src/stm32:  Ports stm32 ltdc and stm32 dma2d to use the
	  framebuffer interface  From Marco Krahl (2018-06-06).
	* syslog:  Enable a partial, crippled version of syslog_flush();
	  arch/:   Call syslog_flush() from assertion handling logic.  From
	  Gregory Nutt (2018-06-07).
	* libs/libc/net:  Add inet_aton()  From Juha Niskanen (2018-06-08).
	* libs/libc/netdb:  Add getaddrinfo() and friends.  From Juha
	  Niskanen (2018-06-08).
	* configs/imxrt1050-evk:  Add knsh configuration.. PROTECTED mode NSH
	  build.  From Gregory Nutt (2018-06-08).
	* libs/libc/termios: Add lib_cfmakeraw.c  From Masayuki Ishikawa
	  (2018-06-12).
	* drivers/xbee: Fixes issue with timeouts.  Timeouts were in ticks but
	  should have been in ms.  This caused false triggers of timeout
	  causing redundant packets, etc.  From Anthony Merlino (2018-06-13).
	* arch/arm/src/lc823450:  Add lc823450 Bluetooth support.  From
	  Masayuki Ishikawa (2018-06-13).
	* stm32f7: serial: Fix ioctl TIOCSSINGLEWIRE
	  The TRM notes that UE must be disabled in order to write HDSEL in
	  USART_CR3. This was not being done, so calls to TIOCSSINGLEWIRE were
	  silently failing.
	  This change checks the state of UE in USART_CR1, clears the UE bit
	  before writing HDSEL, then re-enables it if neccesary.  From Kurt
	  Kiefer (2018-06-14).
	* drivers/sensors:  Add support for Telair T6713 carbon dioxide
	  sensor.  From Juha Niskanen (2018-06-15).
	* arch/arm/src/stm32f7:  This change ports in Marco Krahl's STM32F4
	  framebuffer overlays for the LTDC and DMA2D into the STM32F7.  That
	  driver was same as the STM32F4 driver.  From Gregory Nutt (2018-06-15).
	* Eliminate use of the non-standard type systime_t and replace it the
	  equivalent, standard type clock_t  From Gregory Nutt (2018-06-16).
	* syscall/:  clock_systimer() is no longer a system call.  It has been
	  replaced with the equivalent, standard interface clock() as the
	  system call.
	  sched/clock:  Move the implementation of clock() from libs/libc/time
	  to sched/clock.  This is necessary because it calls the (now)
	  internal OS function clock_systimer.  clock() is now accessed only
	  via a system call in certain configurations.  From Gregory Nutt
	  (2018-06-16).
	* /arch/arm/src/xmc4:  Fix XMC4 SPI.  It was working only for the first
	  transfer  From Alan Carvalho de Assis (2018-06-16).
	* configs/xmc4500-relax: Add support to MAX6675 on XMC4500-Relax
	  board.  drivers/sensors/max6675.c:  Increases SPI frequency from
	  400Khz to 4MHz.  From Alan Carvalho de Assis (2018-06-16).
	* This commit brings in a partial STMicro STM32H7.  From Simon Laube
	  (2018-06-16).
	* configs/stm32f4discovery: Remove STM32F4BB dependence from rndis; add
	  RAMDISK support.  From Alan Carvalho de Assis (2018-06-18).
	* arch/arm/src/stm32l4:  STM32L4 has fetchadd and testset  From Juha
	  Niskanen (2018-06-18).
	* libs/libc/netdb/lib_getaddrinfo.c:  The 'port' argument to the static
	  alloc_ai() function is always in network byte order.  However, that
	  static function was still calling HTONS() on the port, incorrectly
	  converting it back to host byte order.  From Gregory Nutt (2018-06-18).
	* arch/arm/src/:  This commit removes support for the dedicated vector
	  handling from the many older architectures. Only common vectors are
	  now supported.  From Gregory Nutt (2018-06-19).
	* fs/smartfs: Fixed filesystem corruption when writing to small file
	  after open(... O_APPEND)  From Dmitriy Linikov (2018-06-20).
	* arch/arm/src/stm32f7:  Port input capture from stm32  From Juha
	  Niskanen (2018-06-21).
	* arch/arm/src/armv7a and imx6:  Add support for per-CPU IRQ and FIQ
	  interrupt stacks (bugfix).  Add support so that up_assert will print
	  the correct interrupt stack on an assertion (FIQ stack is still not
	  printed).  From Gregory Nutt (2018-06-21).
	* net/udp:  When sending a broadcast (or multicast) packet do not
	  attempt to look up the device by the destination IP address.  Rather,
	  use the locally bound address for these cases to select the correct
	  network device.  From Gregory Nutt (2018-06-22).
	* net/:  There are many different checks for IPv6 multicast addresses.
	  Most of the checks are different.  RFC 3513 clearly specifies how to
	  detect an IPv6 multicast address:  they should begin with 0xffxx.  I
	  did not change some of the checks in ipv6_input.c, however.  In that
	  file, the comments indicate that the code should only pick of certain
	  multicast address that begin withi 0xff02.  From Gregory Nutt
	  (2018-06-23).
	* net/:  Fix a sixlowpan typo bug recently introduced;  Rename
	  g_ipv6_allzeroaddre with the more meaning g_ipv6_unspecaddr since the
	  all-zero address is the IPv6 unspecified address (sometime
	  IN6_ADDR_ANY).  Replace more inline tests for IPv6 multicast with
	  common net_is_addr_mcast() macro.  From Gregory Nutt (2018-06-23).
	* net/:  Rename CONFIG_TCP_REASSEMBLY to CONFIG_IPv4_REASSEMBLY.  Add
	  some fixes to get a clean compile with CONFIG_IPv4_REASSEMBLY
	  enabled.  There are several problems with the current
	  implementation:  It is untested (and depends on
	  CONFIG_EXPERMIMENTAL).  It uses some Ethernet specific definitions
	  (and depends on CONFIG_NET_ETHERNET).  There is only a single
	  reassembly buffer.  The last two issues prevent use of this feature
	  in any context where IPv4 packets may be reassembled for multiple
	  network devices concurrently).  From Gregory Nutt (2018-06-24).
	* net/tcp:  Re-think CONFIG_NET_TCP_RWND_CONTROL TCP windowing
	  controls.  From Gregory Nutt (2018-06-24).
	* net/udp:  Fix a hole in the address lookup logic.  From Gregory Nutt
	  (2018-06-25).
	* stm32f7: Fix compile error caused by intentional use of fall through
	  From Daniel Agar (2018-06-25).
	* net/:  Add driver interface index support.  Add implementation of
	  if_nametoindex() and if indextoname().  Raw AF_PACKET sockets now
	  depend on CONFIG_NETDEV_IFINDEX.  Add syscall support for
	  if_nametoindex() and if_indextoname().
	  Includes an algorithm to prevent an interface index from being reused
	  until all network interfaces have by assigned once.  The prevents
	  removable devices from being removed, unregistered and re-installed,
	  re-registered and keeping the same interface index.  From Gregory
	  Nutt (2018-06-25).
	* net/netdev:  Fix.. Too many calls to net_unlock()  From Gregory Nutt
	  (2018-06-25).
	* net/udp:  Add support for the UDP_BINDTODEVICE protocol socket
	  option  From Sebastien Lorquet (2018-06-25).
	* configs/stm32f746g-disco:  Add support for STM32F746G-disco board
	  LCD  From Marcin Wyrwas (2018-06-25).
	* arch/arm/src/stm32f7/chip/stm32f72xx73xx_dma.h:  Macros did not
	  account for the increase from 8 to 16 DMA channels.  From Gregory
	  Nutt (2018-06-26).
	* configs/nucleo-l476rg:  Add support for an extern SPI-driver SD card
	  on the Nucleo-L476RG.  From Gregory Nutt (2018-06-26).
	* fs/mount/fs_automount.c:  Ignore return values from work_cancel().
	  From Gregory Nutt (2018-06-27).
	* arch/arm/src/lc823450:  Fix setintstack macro in chip.h.  In case of
	  CONFIG_SMP=y, g_cpu0_instack_base and g_cpu1_instack_base are not
	  allocated just after g_instack_alloc but these values show the
	  addresses for interrupt stack of each CPU. So to set the stack
	  pointer based on these variables, temporal register has to be used.
	  From Masayuki Ishikawa (2018-06-27).
	* arch/arm/src/imxrt:  Add support for the i.MXRT RTC.  This initial
	  commit is code complete (with limited features and options) but untested.
	  The HPRTC is functional.  However, if the LPSRTC is enabled, then
	  there is a hang during LPSRTC initialization.  It appears that there
	  is some problem in providing clocking and initializing the LPSRTC
	  domain.  From Gregory Nutt (2018-06-27).
	* tools/testbuild.sh:  Add option to specify location of nuttx
	  directory.  From Gregory Nutt (2018-06-27).
	* stm32f7:  I2C reset Configure I2C pins as GPIO output.  Pins were
	  reset to inputs in the deinit. This resets them to outputs.  From
	  David Sidrane (2018-06-27).
	* Commit 0c963449d6e8f5f8b2dfe96e9de3116633a3749a, 'fs/vfs:  Added
	  support for checking if a descriptor is a socket in fstat().',
	  changed sys/stat.h in way that breaks smartfs file-type stat flags.
	  CROMFS is similarly broken, as tools/gencromfs.c was not updated to
	  match the sys/stat.h changes.  This commit fixes both issues.  It
	  probably is not a good idea to use NuttX sys/stat.h bit-field values
	  directly in stored structure of filesystem.  From Jussi Kivilinna
	  (2018-06-28).
	* arch/arm/src/imxrt:  Add trivial SNVS from Rev 1. of the Reference
	  Manual.  From Gregory Nutt (2018-06-28).
	* arch/arm/src/lpc43:  Fix lpc43 CAN configuration.  Configuration
	  settings were used and documented in README.txt files, but never in
	  any Kconfig file.  From Gregory Nutt (2018-06-28).
	* tools/refresh.sh:  Add a --prompt option that will let you use
	  --silent but will prompt before overwriting the original defconfig.
	  From Gregory Nutt (2018-06-28).
	* Update tools/link.sh per suggestions by Mark so that it can be used
	  with MSYS vs copydir.sh.  From Gregory Nutt (2018-06-29).
	* configs/pcblogic-pic32mx, sure-pic32mx, ubw32:  Update configurations
	  so that either the MPLAB or Penguino toolchains may be used.  From
	  Gregory Nutt (2018-06-29).
	* net/tcp:  Re-work of TCP receive window size algorithm.  The new
	  logic is based only on the ability to buffer TCP read-ahead data.
	  From Gregory Nutt (2018-07-01).
	* arch/arm/src/xmc4/xmc4_gpio.c:  Add a specific bit encoding for
	  opendrain GPIO pin.  From Alan Carvalho de Assis (2018-07-02).
	* configs/stm32f746g-disco:  Add support for STM32F746G-disco board
	  SDRAM  Changed fb config to use SDRAM and fixed compilation  From
	  Marcin Wyrwas (2018-07-02).
	* arch/arm/src/lc823450: Add tx start threshold to lc823450_i2s.c In
	  addition, lc823450_i2s_send() now accepts byte-aligned stream.  From
	  Masayuki Ishikawa (2018-07-03).
	* drivers/usbhost/usbhost_max3421e.c:  Add support for the Maxim M3421E
	  USB host driver.  From Gregory Nutt (2018-07-03).
	* net/udp:  Restore some legacy behavior that was lost with the
	  implementation of CONFIG_NET_UDP_BINDTODEVICE:  If no device has a
	  local address when the broadcast packet is sent and the UDP socket is
	  not bound to a device, there select some arbitrary device.  This is
	  certainly lunacy in the case where there are multiple network devices
	  registered because the wrong device will probably be returned.  It
	  works find, however, for the legacy case where only a single network
	  device is registered.  From Gregory Nutt (2018-07-04).
	* arch/arm/src/samv7:  Add ability for CAN BUS_OFF autorecovery
	  according ISO11898-1:2015.  With this change we added an ioctl for
	  triggering the autorecovery sequence for BUS_OFF to the CAN-driver
	  and the SAMV7 low-level driver.  According the datasheet: If the
	  device goes Bus_Off, it will set MCAN_CCCR.INIT of its own accord,
	  stopping all bus activities. Once MCAN_CCCR.INIT has been cleared by
	  the processor (application), the device will then wait for 129
	  occurrences of Bus Idle (129 * 11 consecutive recessive bits) before
	  resuming normal operation. At the end of the Bus_Off recovery
	  sequence, the Error Management Counters will be reset. During the
	  waiting time after the resetting of MCAN_CCCR.INIT, each time a
	  sequence of 11 recessive bits has been monitored, a Bit0 Error code
	  is written to MCAN_PSR.LEC, enabling the processor to readily check
	  up whether the CAN bus is stuck at dominant or continuously disturbed
	  and to monitor the Bus_Off recovery sequence. MCAN_ECR.REC is used to
	  count these sequences.  From Frank Benkert (2018-07-04).
	* This commit attempts remove some long standard confusion in naming
	  and some actual problems that result from the naming confusion.  The
	  basic problem is the standard MTU does not include the size of the
	  Ethernet header.  For clarity, I changed the naming of most things
	  called MTU to PKTSIZE.  For example, CONFIG_NET_ETH_MTU is now
	  CONFIG_NET_ETH_PKTSIZE.
	  This makes the user interface a little hostile.  People thing of an
	  MTU of 1500 bytes, but the corresponding packet is really 1514 bytes
	  (including the 14 byte Ethernet header).  A more friendly solution
	  would configure the MTU (as before), but then derive the packet
	  buffer size by adding the MAC header length.  Instead, we define the
	  packet buffer size then derive the MTU.
	  The MTU is not common currency in networking.  On the wire, the only
	  real issue is the MSS which is derived from MTU by subtracting the IP
	  header and TCP header sizes (for the case of TCP).  Now it is derived
	  for the PKTSIZE by subtracting the IP header, the TCP header, and the
	  MAC header sizes.  So we should be all good and without the recurring
	  14 byte error in MTU's and MSS's.  From Gregory Nutt (2018-07-04).
	* arch/arm/src/stm32f7/stm32_sdmmc.c:  Add SDIO card support.  From
	  Ramtin Amin (2018-07-05).
	* net/tcp:  Set the default TCP MSS to the value required by RFC 879
	  and never change it under any circumstance unless the remote host
	  requests a larger MSS via an option the TCP header.  From Gregory
	  Nutt (2018-07-05).
	* configs/viewtool-stm32f107:  Add a TCP performance test using
	  apps/examples/tcpblaster.  From Gregory Nutt (2018-07-05).
	* net/tcp:  Fix a deadlock condition that can occur when (1) all
	  network logic runs on a single work queue, (1) TCP write buffering is
	  enabled, and (2) we run out of IOBs.  In this case, the TCP write
	  buffering logic was blocking on iob_alloc() with the network locked.
	  Since the network was locked, the device driver polls that would
	  provide take the write buffer data and release the IOBs could not
	  execute.  This fixes the problem by unlocking the network lock while
	  waiting for the IOBs.  From Gregory Nutt (2018-07-06).
	* stm32_dac.c: set OUTEN bit for DAC1CH2 and DAC2CH1
	  power/motor: direction parameter is now int8 + add overload fault
	  libdsp: all floats with f-sufix
	  libdsp: add precision option for library
	  libdsp: add debug option for library and assertions in functions
	  libdsp: add current samples correction for SVM3
	  libds:  add some motor control specific functions
	  libdsp: add basic speed observer
	  libdsp: fix phase shift in SMO observer
	  libdsp: add more logic to FOC
	  config/sim/dsptest: add dsptest configuration
	  libdsp/lib_motor.c: remove unused comparation
	  libdsp/lib_observer.c: update some comments  From Mateusz Szafoni
	  (2018-07-07).
	* drivers/leds/pca9635pw.c and
	  configs/stm32f4discovery/src/stm32_pca9635.c: Fix pca9635pw LED
	  driver compilation  From Alan Carvalho de Assis (2018-07-07).
	* arch/arm/src/lpc54xx:  The LPC54608 can only run at a maximum
	  frequency of 180Mhz.  This configuration requires uses the clk_in,
	  external crystal clock, to drive the PLL.  When that input was
	  selected, the board bootup failed waiting for the PLL to lock.  After
	  referring the driver from NXP, we should turn on power sources for
	  the ext clock if system pll input select clk_in.  NOTE that the
	  LPC54628 did not require this step... perhaps because the system
	  oscillator power was already enabled.  From kxjiang (2018-07-08).
	* tools/mkexport.sh:  Save the System.map file in the export package so
	  that it can be used to extract addresses.  From Gregory Nutt
	  (2018-07-08).
	* tools/mkexport.sh:  Save the User.map file in the export package if
	  available.  From Gregory Nutt (2018-07-09).
	* include/nuttx/fs/hostfs.h:  Update duplicated definitions in HOSTFS
	  that must match NuttX values.  From ligd (2018-07-09).
	* arch/arm/src/stm32l4/chip/: Corrects some mistakes in pin definitions
	  for the STM32L4 family.  According to datasheet of STM32L496xx,
	  STM32L475xx and STM32L443XX the AF2 of PE14 is  TIM1_BKIN2 not
	  TIM2_BKIN.  From Daniel Pereira Carvalho (2018-07-10).
	* arch/arm/src/lc823450:  Add lc832450 elf test  From Masayuki Ishikawa
	  (2018-07-12).
	* - arch/arm/src/stm32h7:  After numerous changes, the basic STM32 H7
	  NSH configuration is now functional  From Mateusz Szafoni (2018-07-12).
	* nucleo-h743zi/nsh: use Nucleo Virtual console as default serial  From
	  Mateusz Szafoni (2018-07-12).
	* STM32 F0, F1-F4, F7, L4, H7:  Added Single Wire Kconfig variable.
	  From David Sidrane (2018-07-12).
	* drivers/audio: Fix compile error in i2schar.c
	  (CONFIG_DEBUG_ASSERTIONS=y)  From Masayuki Ishikawa (2018-07-13).
	* configs/viewtool-stm32f107:  Add support for the MAX3421E to the
	  viewtool-stm32107 board support  From Gregory Nutt (2018-07-13).
	* configs/lc823450-xgevk:  Fix parallel build on lc823450-xgevk
	  This change fixes an archive file (*.a) corruption by locking
	  $(TOPDIR).  Please note that locking the current directory is
	  insufficient because some archive files such as libapps.a are
	  specified with absolute path.  From Masayuki Ishikawa (2018-07-14).
	* configs/lc82345-xgevk: Add posix_spawn configuration  From Masayuki
	  Ishikawa (2018-07-14).
	* libs/libc/unistd/Kconfig:  Fix backward conditional logic.  From
	  Gregory Nutt (2018-07-14).
	* configs/stm32f4discovery/src/stm32_rgbled.c:  Krassimir Cheshmedzhiev
	  claims that sys/types.h needs to be included to avoid undeclared
	  'OK'  From Gregory Nutt (2018-07-15).
	* arch/arm/src/stm32f7/chip/stm32f72xx73xx_pinmap.h: All of the SDMMC
	  pins were set to 50 MHz, but not the clock. This sets the clock to 50
	  MHz also.  This combined with turning on I/O compensation makes
	  intermittent failures go away.  From Bob Feritich (2018-07-15).
	* arch/arm/src/stm32f7:  Port Bob Feritich's change to SDMMC2 and to
	  all other STM32F7 architectures.  Also add a configuration option to
	  automatically enable I/O compensation.
	  arch/arm/src/stm32:  Port Bob Feritich's change to STM32 F2 and F4
	  which appear to have identical SD support and I/O compensation
	  requirements.  From Gregory Nutt (2018-07-15).
	* arch/arm/src/stm32l4: Added custom pin mapping for STM32L4X2XX
	  processors.  From Daniel P. Carvalho (2018-07-16).
	* stm32f746g-disco/nxdemo:  Add a configuration to build working nxdemo
	  application  From Fanda (2018-07-17).
	* configs/nucleo-l432kc:  Fix RAM size; STM31L4x2xx has only 64Kb of
	  RAM.  Remove references to I2C and SDIO:  There is no I2C2 or SDIO on
	  the STM32F4x2xx.  From Daniel P. Carvalho (2018-07-17).
	* net/udp/udp_finddev.c:  Fix for network byte-order issue when
	  checking if an address is a multicast address.  From Jake Choy
	  (2018-07-17).
	* arch/arm/src/lc823450: Add SPI flash driver for lc823450.  NOTE: Only
	  bus accelerator mode is supported.  From Masayuki Ishikawa
	  (2018-07-18).
	* net/ and include/nuttx/net:  Add getpeername() support  From ligd
	  (2018-07-19).
	* syscall/:  Add support for getpeername() and get_sockname() system
	  calls.  From Gregory Nutt (2018-07-19).
	* libs/libc/stdlib and include/stdlib.h:  Add implementation of
	  random() and srandom().  From Gregory Nutt (2018-07-19).
	* kinetis:  USB0 fix interrupt storm on error.  The ERROR bit of
	  USBx_ISTAT needed to be cleared once an error occurs.  From David
	  Sidrane (2018-07-19).
	* configs/lpcxpresso-lpc54628/lvgl:  Update lvgl board config to use
	  the new version  From Alan Carvalho de Assis (2018-07-19).
	* arch/arm/src/lc823450: Add support for mpu and userspace
	  configs/lc823450-xgevk: Add kostest PROTECTED build
	  configs/lc823450-xgevk: Add knsh PROTECTED build  From Masayuki
	  Ishikawa (2018-07-20).
	* syscall/:  Fix 6th parameter type of posix_spawnp in syscall.csv
	  From Masayuki Ishikawa (2018-07-20).
	* libs/libc/unistd/:  Add a crippled version of daemon().  From Gregory
	  Nutt (2018-07-20).
	* arch/arm/src/stm32f7/:  Fix data timeout errors with multiblock
	  transfers.  From Bob Feretich (2018-07-20).
	* drivers/mmcsd/mmcsd_sdio.c:  Fix an error that was causing SDIO
	  multiple block transfers from achieving full performance.  From Bob
	  Feretich (2018-07-20).
	* drivers/leds/max7219.c:  Add support to MAX7219 to control 7-segment
	  displays
	  configs/stm32f4discovery/src:  Add board support to MAX7219 as
	  numeric display controller  From Alan Carvalho de Assis (2018-07-22).
	* Rename all usage of samdl/SAMDL to samd2l2/SAMD2L2 to make room in
	  the name space for the forthcoming samd5e5/SAMD5E5  From Gregory Nutt
	  (2018-07-22).
	* syscall/:  Fix parallel build in making context.  This change avoids
	  running $(MKSYSCALL) and .context in parallel and ensures that
	  tools/mksyscall is built before it is actually used.  From Masayuki
	  Ishikawa (2018-07-23).
	* arch/arm/src/samv7/sam_mcan.c: Correct an error in the BUS_OFF
	  reporting.  In case of BUS_OFF the old implementation was leading to
	  a package storm.  Now it reports the error condition BUS_OFF only
	  once.  From Frank Benkert (2018-07-23).
	* arch/arm/src/kinetis:  SDHC fix SDIO driver so that DMA works.
	  There were 2 problems. The first was that the interrupt did test DINT
	  and raise a completion events. But since DINT is just an indication
	  of DMA completion, TC is a valid way to determine that the transfer
	  is complete.  The second problem is that Software Reset For DAT Line
	  SDHC_SYSCTL[RSTD] clears the bits 24-0 in SDHC_PROTO this looses the
	  wide bus setting DTW  From David Sidrane (2018-07-23).
	* arch/arm:  Add CONFIG_DEBUG_MEMFAULT to Kconfig.  Also, fix
	  src/armv7-m/up_memfault.c  From Masayuki Ishikawa (2018-07-24).
	* fs/tmpfs/fs_tmpfs.c:  Correct logic in tmpfs_ioctl() that extracts
	  the priv state structure from the file system structures.  It was not
	  getting the right value and causing mmap() to fail.  Noted by Jesse.
	  From Gregory Nutt (2018-07-24).
	* include/sys: Fix SYS_maxsyscall in syscall.h  From Masayuki Ishikawa
    (2018-07-25).
	* libs/libc/netdb: Fix a link error in lib_gethostbynamer.c with
	  protected build.  NOTE: g_lo_ipv4addr also exists in
	  net/loopback/lo_globals.c which can be linked with kernel build only.
	  From Masayuki Ishikawa (2018-07-25).
	* arch/arm/src/imxrt/chip/imxrt_lpspi.h: IMXRT1050 LPSPI register and
	  bit definitions added.
	  arch/arm/src/imxrt/imxrt_serial.c: IMXRT1050 LPUART TERMIOS support
	  added.  From Ivan Ucherdzhiev (2018-07-26).
	* include/sys: Remove unused SYS_nnetsocket from syscall.h.  Because
	  SYS_nnetsocket is not implemented so far, it should be removed so that
	  SYS_prctl can work correctly.  From Masayuki Ishikawa (2018-07-26).
	* binfmt/:  Refactor binfmt_exec.c.   This change also fixes an argv
	  issue for CONFIG_SCHED_ONEXIT=n or CONFIG_SCHED_HAVE_PARENT=n  From
	  Masayuki Ishikawa (2018-07-26).
	* arch/arm/src/imxrt:  I finally got the Ethernet CRC32 to work
	  properly after the FAE pointed me in the right direction:  (1) Added
	  CRC32 functions for multicast address filtering, (2) Do not reset PHY
	  settings when doing an ifup, (2) Use chip's unique id as the device
	  MAC, and (4) Enable discard enet frames with errors at PHY layer.
	  From Jake Choy (2018-07-26).
	* arch/arm/src/samd5e5 and configs/metro-m4:  Initial commit the port
	  to the SAMD5x/E5x MCU family and also support for the Adafruit Metro
	  M4 board.  It port is untested and unfinished.  It currently will not
	  even link due to some missing clock related logic.  From Gregory Nutt
	  (2018-07-26).
	* configs/stm32vldiscovery:  Changed the status LED to be the green one
	  as mentioned in the README file. Removed the global array for buttons
	  and replace it with the only button. Improve defconfig for the nsh
	  configuration.  From Ouss4 (2018-07-27).
	* arch/arm/src/samd5e5:  Completes XOSC32, XOSC0/1, MCLK, and GCLK
	  configuration logic.  Still needs FDPLL and FDLL support.  From
	  Gregory Nutt (2018-07-27).
	* arch/arm/src/samd5e5/sam_clockconfig.c:  Implement DFLL and DFPLL0/1
	  support.  This completes coding the the re-architected clock
	  configuration logic.  From Gregory Nutt (2018-07-28).
	* arch/arm/src/samd5e5:  Bring in untested SPI and I2C drivers from
	  SAMD2L2.  From Gregory Nutt (2018-07-29).
	* arch/arm/src/samd5e5:  Leverage the SAMD2L2 DMA controller.  From
	  Gregory Nutt (2018-07-29).
	* arch/arm: Introduce CONFIG_DEBUG_HARDFAULT_INFO to Kconfig
	  arch/arm/src/armv7-m: Introduce CONFIG_DEBUG_HARDFAULT_INFO to
	  up_hardfault.c
	  arch/arm/src/armv6-m: Introduce CONFIG_DEBUG_HARDFAULT_INFO to
	  up_hardfault.c  From Masayuki Ishikawa (2018-07-30).
	* sched/mqueue/mq_notify.c: Fix - only part of struct copied to
	  internal structure.  As source address the address of the struct
	  member sigev_value was used, and it is not located the start of the
	  struct. This leads to invalid data being copied to internal
	  structure.  Both source and destination should be of type struct
	  sigevent* .  From Simon Liedl (2018-07-30).
	* arch/arm/src/samd5e5/sam_usb.c:  Bring the SAMDL2 USB driver into the
	  SAMD5E5 port.  From Gregory Nutt (2018-07-30).
	* drivers/usbhost/usbhost_max3421e.c:  Fix several errors found in
	  early testing.
	  drivers/usbhost/usbhost_max3421e.c:  Mutual exclusion semaphore must
	  be re-entrant.
	  drivers/usbhost/usbhost_max3421e.c:  Fix unmatched SPI lock/unlock.
	  From Gregory Nutt (2018-07-30).
	* configs/metro-m4:  Correct SERCOM3 pin configuration  From Gregory
	  Nutt (2018-08-01).
	* stm32f746g-disco: touchscreen support:  Fixed FT5x06 driver to
	  correctly close (previously it unregistered interrupt handler during
	  close).  Also added LittlevGL demo for STM32F746G-DISCO  From Marcin
	  Wyrwas (2018-08-01).
	* drivers/analog:  Add driver for digital to analog converted DAC7571.
	  configs/nucleo-l432kc:  Add support for a connect DAC7571 converter.
	  From Daniel Pereira Carvalho (2018-08-02).
	* drivers/sensors/adxl345: remove comment references to touchscreens
	  From Russ Webber (2018-08-02).
	* arch/arm/include/armv7-m, arch/arm/include/armv7-m,
	  arch/arm/include/stm32f7:  Add a configuration to enable workaround
	  for r0p1 Errata 837070: Increasing priority using write to BASEPRI
	  does not take effect immediately.
	  This update is required to be serialized to the instruction stream
	  meaning that after this update completes, it takes effect immediately
	  and no exceptions of lower priority than the new boosted priority can
	  pre-empt execution.  Because of this erratum, the priority boosting
	  does not take place immediately, allowing the instruction after the
	  MSR to be interrupted by an exception of lower priority than the new
	  boosted priority. This effect is only limited to the next
	  instruction. Subsequent instructions are guaranteed to see the new
	  boosted priority.
	  This was raised in Bitbucket issue 113 from Vadzim Dambrouski.  From
	  Gregory Nutt (2018-08-02).
	* net/tcp: Remove g_netstats.tcp.syndrop++ from tcp_data_event()  From
	  Masayuki Ishikawa (2018-08-03).
	* include/nuttx/i2c/i2c_master.h:  Add a definition to distinguish a
	  new START of messages from a repeated start.  No lower-half I2C
	  drivers actually implement this new flag bit, however.
	  drivers/i2c/i2c_writeread.c:  Use new repeated START definition where
	  appropriate.  Rename I2C_M_NORESTART to I2C_M_NOSTART since it may be
	  used in other contexts than a repeated start.  Add comments to
	  clarify setup for repeated start.  From Gregory Nutt (2018-08-03).
	* configs/nucleo-l432kc: Fix stm32_userleds.  After change LD2 to LD3
	  in board.h stm32_userleds.c was broken.  From Daniel P. Carvalho
	  (2018-08-03).
	* arch/arm/src/stm32f7:  This commit ports the stm32f20xxf40xx_flash.c
	  driver to the STM32F7 platform and fixes some relevant problems in
	  the header files.  From Evgeniy Bobkov (2018-08-03).
	* net/netlink:  This commit brings in a fragmentary, experimental
	  implementation of NETLINK sockets.  There is not too much to that
	  socket support on this initial commit, just the netlink socket
	  framework.  However, I decided to bring it into master because there
	  is a enough that I would not want to lose what is in place.  And
	  since it is dependent on CONFIG_EXPERIMENTAL, its presence on master
	  should be innocuous.  From Gregory Nutt (2018-08-03).
	* configs/metro-m4:  Add an option to build the Metro M4 image to run
	  out of SRAM.  This ought to be a safer and quicker way to do the
	  initial bring-up (having bricked the first Metro M4 due to a bad
	  FLASH image).  From Gregory Nutt (2018-08-03).
	* Revise the Cortex-M7 workaround:  That change had the subtle
	  side-effect of unconditionally enabling interrupts in the primask.
	  That may be what we want in most cases, but certainly not all.  This
	  does increase the size of the inline function by about 48-bits per
	  instantiation.  From Gregory Nutt (2018-08-04).
	* configs/olimex-stm32-p407:  Add kernel ELF (kelf) configuration.
	  From Gregory Nutt (2018-08-04).
	* binfmt/ and sched/group:  Re-architect the way that loadable ELF or
	  NXFLAT modules are unloaded.  Memory resources must be recovered when
	  the task loaded into memory exits.  The original implementation used
	  the death-of-child SIGCHLD signal to perform the unload.  There are
	  several problems with this:  It is overly complex, it requires that
	  the parent task stay resident while the loaded task runs, and it has
	  fatal logic flaws in the protected and kernel model builds because
	  the user signal handler attempts to run in the kernel address space.
	  This commit corrects with using a mindlessly simply BINFMT callback
	  when the task exits.  From Gregory Nutt (2018-08-05).
	* Kconfig files:  Fix several errors noted by Alex Denisov in Bitbucket
	  issue 115.  From Gregory Nutt (2018-08-05).
	* configs/olimex-stm32-p407/kmodule:  Add a configuration that can be
	  used for testing installation of kernel modules in the protected
	  build.  From Gregory Nutt (2018-08-05).
	* sched/group: Fix a deadlock when loading an ELF  From Masayuki
	  Ishikawa (2018-08-06).
	* arch/arm/src/lc823450: Change C-Buffer under-level control.  The
	  under-level setting was changed from 1KB to 55KB.  In previous
	  implementation, the setting can ben changed by the tx threshold but
	  it is fixed at startup. Also, check write size and adjust alignment
	  if needed.
	  configs/lc823450-xgevk: Change IOB related params for rndis.  Since
	  TCP flow control scheme was changed, HTTP audio streaming has not
	  been working. These IOB params are not optimized but HTTP audio
	  streaming now works.  From Masayuki Ishikawa (2018-08-06).
	* arch/arm/src/stm32l4/chip/stm32l4x3xx_pinmap.h: Recent commit removed
	  some of the pin definitions for STM32L451xx, and probably some other
	  chips of the STM32L4x3 subfamily, breaking our builds. Some chips of
	  the subfamily don't have these peripherals, but some do, so that is
	  not a valid reason to remove them.  From Juha Niskanen (2018-08-06).
	* stm32f103-minimum:  Add blackpill LED support  From Russ Webber
	  (2018-08-07).
	* Build System:  This change extends support for the two-pass build.
	  Its primary purpose is to incorporate source logic generated by
	  applications into the kernel phase of the build.
	  In the two pass build, the application logic is built during the
	  first phase, pass 1.  In that phase, the application may generate and
	  install source files in the pass1/directory.  The operating system is
	  built during phase 2 of the build.  At that time, those source files
	  in the pass1/ directory will be built and incorporated into the
	  kernel address space.
	  The primary purpose of the pass1/ directory is to such
	  application-generated kernel symbol tables.  For an example of the
	  use of this feature, look at apps/examples/module/drivers/Makefile.
	  Kernel symbol tables are needed to support kernel modules.  Of
	  course, addition board-specific logic in, say, configs/<board>/src
	  would have to be included to make use of the application-installed
	  symbol tables.  From Gregory Nutt (2018-08-07).
	* configs/olimex-stm32_p407:  Add logic to support initialization of
	  the kernel module symbol table installed in the pass1/ directory
	  during the application phase of the build.  The kmodule configuration
	  appears to be fully functional.  From Gregory Nutt (2018-08-07).
	* configs/nucleo-l432kc/include/nucleo-l432kc.h: Fix TIMx clock
	  configuration.  Also removes definitions related to timers not
	  available in the STM32L432KC.  From Daniel Pereira Carvalho
	  (2018-08-07).
	* arch/arm/src/stm32l4:  Fix ADC and COMP breakage caused by
	  CONFIG_STM32L4_STM32L4X2 separation in 9223123c  From Juha Niskanen
	  (2018-08-08).
	* configs/nucleo-l452re:  Fix TIMx clock configuration.  This is cloned
	  from 391f3715 for nucleo-l432kc. Also fixes DAC build failure.  From
	  Juha Niskanen (2018-08-08).
	* arch/arm/src/stm32, stm32f7, stm32l4, and related defconfig files:
	  The STM32 RTC driver was being selected by the global CONFIG_RTC
	  option.  That is in correct.  For example, if you want to disabled
	  the STM32 RTC and use an external RTC you cannot because the external
	  RTC also depends on the global CONFIG_RTC.  The solution is to add a
	  new CONFIG_STM32xx_RTC configuration option the permits to you select
	  or deselect the STM32 RTC but still be able to selecte the external
	  RTC.  From Gregory Nutt (2018-08-08).
	* configs/stm32f4discovery/scripts/ld.script:  Missing
	  EXTERN(_vectors)  From Gregory Nutt (2018-08-08).
	* arch/arm/src/stm32l4:  Avoid using redundant
	  CONFIG_STM32L4_STM32L4X2.  This is almost always same as
	  CONFIG_STM32L4_STM32L4X3. Avoid duplication to reduce macro clutter.
	  This patch limits CONFIG_STM32L4_STM32L4X2 usage to dependency
	  tracking and pinmap.  Also enable ADC for CONFIG_STM32L4_STM32L4X5
	  (untested, but same RM).  From Juha Niskanen (2018-08-09).
	* arch/arm/src/stm32l4/chip:  Merged stm32l4x2xx and stm32l4x3xx pinmap
	  files. Removed references to stm32l4x2xx_pinmap.h  From Daniel P.
	  Carvalho (2018-08-09).
	* arch/arm/src/kinetis:  PIT add Liftime and Chaining
	  arch/arm/src/kinetis:  flexcan fix duplicate line and ordering
	  arch/arm/src/kinetis: kinetis_lowput.c LPUART data format with
	  parity fix.  The 9-bit data mode is typically used with parity to
	  allow eight bits of data plus the parity
	  arch/arm/src/kinetis: lowputc  LPUART_BAUD_INIT has to be defined.
	  Build fails with test case enable LPUART0 and make UART1 console.  If
	  HAVE_LPUART_DEVICE is defined then LPUART_BAUD_INIT has to be defined
	  even if the lpuart is not the console  From David Sidrane (2018-08-09).
	* - arch/arm/src/kinetis: Add DMA support and use  Circular DMA as an
	  option to augment the RX FIFOs in the Serial driver.  From David
	  Sidrane (2018-08-10).
	* fs/proc and sched/environ:  Add support for a procfs entry that will
	  permit examining the environment of any task.  From Gregory Nutt
	  (2018-08-10).
	* tools/kconfig2html.c:  Update tool to handle tristate types.  Fix a
	  few errors detected in Kconfig files.  From Gregory Nutt (2018-08-10).
	* arch/arm/src/stm32l4:  Add initial support to STM32L4+ chips  From
	  Juha Niskanen (2018-08-13).
	* configs/stm32l4r9ai-disco:  Add stm32l4r9ai-disco support.  From Juha
	  Niskanen (2018-08-13).
	* arch/arm/src/stm32l4:  stm32l4xrxx: allow board to override flash
	  wait states  From Juha Niskanen (2018-08-14).
	* configs/stm32l4r9ai-disco:  Fix HSE clock config and clock board to
	  maximum 120 MHz  From Juha Niskanen (2018-08-14).
	* drivers/net/tun.c: Fixed custom tun devname formatting.  From Dmitriy
	  Linikov (2018-08-14).
	* net/:  Remove all references to CONFIG_NET_USER_DEVFMT.  That feature
	  is now unconditionally enabled.  This was done because (1) the
	  feature does not require very much additional memory, and (2) it
	  causes confusion in the configuration due to the additional
	  complexity.  Any network drivers that fail to zero the device
	  structure interface name field (d_ifname) because calling
	  netdev_register() will, however, get a nasty surprise.  From Gregory
	  Nutt (2018-08-14).
	* net/:  Change order of logic:  Select the user-defined interface name
	  format BEFORE determining the minor device number.  Otherwise, the
	  default interface name will be used.  From Gregory Nutt (2018-08-14).
	* tools/Config.mk:  Add function CATFILE definition.  Currently only
	  used in apps/builtin/Makefile.  From Gregory Nutt (2018-08-15).
	* tools/Config.mk:  Move the RWILDCARD function definition from
	  apps/builtin/Makefile to nuttx/tools/Config.mk.  It may have a
	  broader usage than it does now.  From Gregory Nutt (2018-08-15).
	* arch/arm/src/stm32/stm32_adc.c:  Allow multiple channels without DMA
	  on STM32L15XX  From Juha Niskanen (2018-08-16).
	* arch/arm/src/stm32, stm32f7, stm32l4:  Make STM32F4XX RTC depend on
	  CONFIG_STM32_RTC.  From Juha Niskanen (2018-08-16).
	* arch/arm/src/stm32l4:  Some updates to analog peripherals ADC, COMP
	  and DFSDM for STM32L4XR  From Juha Niskanen (2018-08-16).
	* drivers/usbdev/cdcecm.c:  Adds USB Device Support for CDC/ECM  From
	  Michael Jung (2018-08-16).
	* include/stdio.h:  Add prototypes for popen() and pclose().  Actual
	  implementation is in apps/system/popen()  From Gregory Nutt
	  (2018-08-17).
	* include/stdio.h:  popen()/pclose() are not available in KERNEL mode
	  because they depend on task_spawn() which is not available in KERNEL
	  mode.  From Gregory Nutt (2018-08-17).
	* fs/procfs/:  Add support for /self, a convenient way for getting
	  information about the currently running task.  From Gregory Nutt
	  (2018-08-18).
	* fs/procfs:  Add a configuration option to disable environment
	  variable info.  From Gregory Nutt (2018-08-19).
	* include/endian.h and libs/libc/endian:  Add support for endian.h.
	  From Gregory Nutt (2018-08-19).
	* include/sys/param.h:  Add a dummy sys/param.h header file.  This is
	  not a standard file but is used by other systems and having the dummy
	  file may minimize some porting efforts.  From Gregory Nutt
	  (2018-08-19).
	* Remove CONFIG_ARCH_CALIBRATION.  It is awkward to use and no longer
	  necessary now that we have apps/examples/calib_udelay.  From Gregory
	  Nutt (2018-08-19).
	* arch/arm/src/stm32f7/stm32_serial.c:  Previous logic would invalidate
	  the data cache as each byte was read from the DMA buffer.  This
	  change adds logic to invalidate the data cache less frequently by
	  monitoring the state of the Rx DMA buffer cache coherency and
	  invalidating only regions as necessary.  From Evgeniy Bobkov
	  (2018-08-21).
	* net/procfs/netdev_statistics.c:  Was not handling the output correct
	  for the case of an IEEE 802.11 device.  From Gregory Nutt (2018-08-21).
	* fs/hostfs:  Add support for open() append mode  From anchao
	  (2018-08-22).
	* fs/hostfs:  Add ftruncate support.  From Xiang Xiao (2018-08-22).
	* sched/symtab:  Reference default symtab name to binfmt  From anchao
	  (2018-08-22).
	* binfmt/elf:  Set priority level to default if parent has no
	  priority.  From anchao (2018-08-22).
	* configs:  Several applications in apps/ were calling elf_initialize()
	  nxflat_initialize(), or builtin_initialize() in violation of the
	  portable POSIX interface.  Those calls were removed from the
	  applications and added to the appropriate board initialization with
	  this commit.  From Gregory Nutt (2018-08-22).
	* drivers/wireless/ieee80211/bcmf_netdev.c:  Add missing logic to poll
	  for more Tx data after the last transfer completes.  From Gregory
	  Nutt (2018-08-22).
	* configs/: Change CONFIG_BOARD_RESET_ON_CRASH to
	  CONFIG_BOARD_RESET_ON_ASSERT, arch/: Implement call to board_reset()
	  if in all implementations of up_assert() when
	  CONFIG_BOARD_RESET_ON_ASSERT=y.  From Xiang Xiao (2018-08-22).
	* apps/system/system/system.c:  Add 'const' to make function prototype
	  compatible with OpenGroup.org requirement  From Xiang Xiao
	  (2018-08-23).
	* arch/arm:  (1) Add semihost support for syslog, (2) Add semihost
	  support for HostFS  From Gregory Nutt (2018-08-23).
	* binfmt:  Add binfmt_initialize().  All binary formats are now
	  registered centrally vs. in board-specific logic.  This simplifies
	  the usage of the binfmt subsystem.  From Xiang Xiao (2018-08-23).
	* mm/: add mm_heapmember function and reimplement kmm_heapmember base
	  on mm_heapmember since this function is very useful if multiple heaps
	  exist.  From Xiang Xiao (2018-08-23).
	* pthreads:  Add support static pthread stack.  Add standard
	  pthread_attr_setstack() and pthread_attr_getstack().  In all cases
	  where the stack is released, add check to see which allocator must be
	  used to free the stack:  The user or the kernel allocator.  From
	  xuanlin (2018-08-23).
	* arch/arm/src/armv7-m:  Implement SYSTICK timer driver  From Xiang
	  Xiao (2018-08-23).
	* configs/sim/loadable:  Add loadable demo for arch sim
	  sched/init: Restore previously reverted option to mount block device
	  for INIT_FILEPATH case
	  configs/stm3240g-eval/knxwm: Fix build breakage.
	  configs:  With recent changes to apps/ all configurations that build
	  applications as modules must now also select CONFIG_APPS_LOADABLE.
	  configs/sim/loadable:  Add loadable demo for arch sim
	  Kconfig and tools/Makefile.unix and : add dynamic application
	  loadable support  From anchao (2018-08-23).
	* tools/nxstyle.c:  Add capability to detect multiple blank lines.
	  Single spacing required by the coding standard.  Also coding standard
	  fixes to server .c files for problems found during testing nxstyle.
	  From Gregory Nutt (2018-08-24).
	* Replace non critical PANIC with DEBUGPANIC to save the code space
	  From Xiang Xiao (2018-08-24).
	* Replace all ASSERT with DEBUGASSERT to save the code space  From
	  Xiang Xiao (2018-08-24).
	* arm syscalls:  svcall/sycall logic needs to get the ucontext argument
	  from R4 instead of stack since all syscall parameters pass from
	  registers in syscall.h  From Xiang Xiao (2018-08-24).
	* arch/arm/armv7-m:  MPU: mpu_log2regionceil needs take into account
	  the offset too  From Xiang Xiao (2018-08-24).
	* arch/ and task/sched: vfork operation needs to allocate and copy the
	  task argument too.  Also correction of the address correction cannot
	  depend on the stack pointer since it is not available in all
	  architectures.  Rather calculate the offset from the stack
	  allocation pointer  From Xiang Xiao (2018-08-24).
	* include/nuttx/arch.h:  Add prototype for an architecture-specific
	  up_trigger_irq function  From dongjianli (2018-08-24).
	* include/nuttx/arch.h:  Add prototype for an architecture-specific
	  up_trigger_irq function
	  arch/, include/nuttx, sched/sched:  Add the garbage collection hook
	  so each architecture can do custom memory cleanup if necessary.
	  arch/Kconfig:  Add configuration CONFIG_ARCH_GNU_NO_WEAKFUNCTIONS to
	  suppress use of weak functions.  Some gnu derived toolchains do not
	  support weak symbols  From Xiang Xiao (2018-08-24).
	* include/nuttx/arch.h:  Add architecture-specific prototypes for
	  conversions between physical and virtual address.  From ligd (2018-08-24).
	* net/arp: arp_find() now checks if the target IP belongs to one of the
	  local network devices.  From Xiang Xiao (2018-08-24).
	* net/netdev: add devif_loopback() to check the loopback case where
	  a packet is being sent to itself.  Modify the net driver to call this
	  function in this case.  This function will simply re-inject the
	  packet back into the network and the network driver will not put
	  anything on the wire.  From Xiang Xiao (2018-08-24).
	* include/nuttx/clock.h, sched/sched: Support the CPU load measurement
	  using timer_lowerhalf_s interface  From Xiang Xiao (2018-08-24).
	* drivers/timers:  Add maxtimeout method to the struct timer_ops_s
	  interface  From Xiang Xiao (2018-08-24).
	* drivers/timers:  Add a new method to the struct oneshot_operations_s
	  interface to get the current time from a oneshot timer driver (if it
	  is available from the lower half)  From Xiang Xiao (2018-08-24).
	* drivers/net:  drivers/net: Add support for Microchip LAN91C111
	  driver  From Xiang Xiao (2018-08-24).
	* arch/sim/src/up_netdriver.c: (1) Remove up_comparemac() check for
	  matching MAC address. Let's trust that the tap device just return the
	  packet which belong to us like other real network device hardware.
	  (2) Add network device statistics support.  From Xiang Xiao
	  (2018-08-24).
	* up_internal.h:  Define out the prototype for up_netinitialize() if
	  CONFIG_NETDEV_LATEINIT is also defined  From dongjianli (2018-08-24).
	* sched/irq/irq_dispatch.c:  Ensure vector never points to NULL since
	  interrupt may happen before irq_initialize()  From Xiang Xiao
	  (2018-08-24).
	* sched/irq:  Add support interrupt chains in NuttX.  IRQ chain is very
	  useful in these cases:  (1) Multiple hardware connect to the same
	  request line(e.g. PCI), (2) Need multiple driver to support one
	  hardware block (like Linux MFD)  From zhuguangqing (2018-08-24).
	* sched/irq/irq_procfs.c: Fix occasional computation error when
	  fracpart >= 1000  From Xiang Xiao (2018-08-24).
	* arch/:  Fix an error found in build testing.  The prototype of
	  mpu_log2regionfloor() changed; an additional parameter was added.
	  However, none of the calls to mpu_log2regionfloor() were updated to
	  pass the new, additional parameter.  From Gregory Nutt (2018-08-24).
	* net/arp:  Make the function arp_find() thread-safe.  It now returns a
	  copy of the MAC address from the ARP table entry, rather than a
	  potentially unstable reference to the ARP table entry.  From Gregory
	  Nutt (2018-08-24).
	* arch/arm/src/kinetis:  I2C ensure timeout on bus error.  The code had
	  a dead wait on I2C_S_BUSY. Noise on the bus would cause the driver to
	  hang.  Add timeout on invalid states of I2C_S_BUSY to allow the upper
	  layers do deal with restart or abort.  From David Sidrane (2018-08-25).
	* sched/irq:  Monitor the irq execution time.  This is very useful for
	  measuring the interrupt latency.  From Xiang Xiao (2018-08-25).
	* drivers/sensors and configs/nucleo-l476g:  Add support for LSM303AGR
	  and LSM6DSL sensors  From DisruptiveNL (2018-08-25).
	* arch/arm/src/armv7-m/up_trigger_irq.c:  Add logic to trigger ARMv7-M
	  interrupts and exceptions.  From Gregory Nutt (2018-08-25).
	* arch/arm/src/armv-7m/nvic.h:  Add definitions needed by
	  up_trigger_irq().  From Gregory Nutt (2018-08-25).
	* drivers/wireless/ieee80211/bcmf_sdio.c:  Bring in some fixes from the
	  'Haywire' branch.  From Gregory Nutt (2018-08-25).
	* sched/wqueue:  Modify high priority work queue to support multiple
	  threads.
	  sched/wqueue and libs/libc/wqueue:  workqueues don't need set global
	  data to zero since .bss is cleared automatically.  Removing this
	  unnecessary initialization also avoids the loss the work items queued
	  before initialization.  From ligd (2018-08-25).
	* sched/wqueue, libs/libc/wqueue, configs:  Remove work queue polling
	  delay to simplify the code logic and save the power.  From xuanlin
	  (2018-08-25).
	* drivers/syslog:  Channel configuration.  Decouple
	  SYSLOG_SERIAL_CONSOLE and ARCH_LOWPUTC.  Since some hardware can
	  output log to the special debug channel not serial.
	  drivers/syslog/vsyslog.c: Support pre-pending a prefix string to log
	  output if enabled.  This very useful to identify which cpu send out
	  the log in AMP SoC.
	  drivers/syslog/vsyslog.c: Make timestamp output same as linux
	  kernel.  It's very useful if NuttX syslog retarget to Linux syslog.
	  From Xiang Xiao (2018-08-26).
	* libs/libc/syslog/lib_syslog.c: Fix syslog crash on 64bit simulation.
	  From anchao (2018-08-26).
	* Write to a pipe when there are no readers from the pipe should return
	  -EPIPE.  From ligd (2018-08-26).
	* drivers/serial/pty.c:  Add support so that a PTY can poll for both
	  IN/OUT event simultaneously.  From ligd (2018-08-26).
	* drivers/serial:  Add Ctrl-C/Ctrl-X support.  This is an initial
	  working implementation that still requires that several details be
	  resolved.
	  sched/task/task_start.c: Add default signal action to SIGKILL.  From
	  ligd (2018-08-26).
	* Send poll() notification when the Tx buffer is flushed  From ligd
	  (2018-08-26).
	* drivers/serial/serial.c: Support UART direct write for non console
	  device  From xuanlin (2018-08-26).
	* drivers/serial/serial.c: Don't overwrite nwritten unconditionally on
	  UART write failure.  From Xiang Xiao (2018-08-26).
	* drivers/serial:  Move head/tail pointer reset to uart_recvchars_dma
	  since dma may be still transferring in the background.  From Xiang
	  Xiao (2018-08-26).
	* drivers/serial/serial.c:  In DMA mode, the use of uart_disablexinit()
	  is insufficient to protect a critical section.
	  enter/leave_critical_section() must be used in those cases if
	  CONFIG_SERIAL_DMA=y  From Xiang Xiao (2018-08-26).
	* drivers/serial/uart_16550.c:  Add a configuration, analogous to the
	  STM32 configuration option, to suppress the NuttX standard
	  re-ordering for /dev/ttySN for special case of the 16550 UART.
	  config/serial: UART 16550: Add CONFIG_SERIAL_UART_ARCH_MMIO option so
	  the a memory mapped device doesn't need to provide uart_getreg() and
	  uart_putreg() implementations.
	  u16550_txempty() should check UART_LSR_TEMT to avoid some data left
	  in the transmit FIFO  From Xiang Xiao (2018-08-26).
	* drivers/serial/uart_16550.c: Add stub implementations of DMA-related
	  methods in the 16550 UART v-table.  From ligd (2018-08-26).
	* drivers/serial/uart_16550.c:  Add serial termios handling  From
	  anchao (2018-08-26).
	* drivers/serial/uart_16550.c: Support 16550 auto hardware flow control
	  drivers/serial/uart_16550.c:  Add configuration option
	  CONFIG_16550_SUPRESS_INITIAL_CONFIG.  This is identical to the
	  standard configuration in arch/Kconfig CONFIG_SUPPRESS_UART_CONFIG,
	  but with scope of only the 16550 driver.  From Xiang Xiao (2018-08-26).
	* fs/hostfs/Kconfig: Remove ARCH_SIM dependence since other
	  architectures (e.g., arm semihosting) could support hostfs too  From
	  Xiang Xiao (2018-08-26).
	* fs/hostfs/hostfs.c: Support remote directory names without a trailing
	  '/'  From ligd (2018-08-26).
	* fs/hostfs/hostfs.c: Ensure f_type is equal to HOSTFS_MAGIC.  From
	  Xiang Xiao (2018-08-26).
	* fs/hostfs/hostfs.c:  Add re-try when hostfs mount() fails  From ligd
	  (2018-08-26).
	* fs/romfs/fs_romfsutil.c: Make romfs_devread32 more portable  From
	  anchao (2018-08-26).
	* fs/nfs:  Update nfs mount to VER3  From zhangyuan7 (2018-08-26).
	* fs/vfs/fs_select.c: Make select be more consistent with Linux man
	  page: 'The timeout ... Some code calls select() with all three sets
	  empty, nfds zero, and a non-NULL timeout as a fairly portable way to
	  sleep with subsecond precision.'  From anchao (2018-08-26).
	* fs/vfs/fs_fstat.c:  Add file_fstat() function for internal OS use.
	  From ligd (2018-08-26).
	* fs/vfs/fs_fcntl.c, net/socket/net_dupsd.c, and
	  net/socket/net_vfcntl.c:  Add file_fcntl, psock_fcntl, and
	  psock_dupsd for use within the kernel.  From Xiang Xiao (2018-08-26).
	* fs/vfs/fs_poll.c: Add poll use in kernel space.  From dongjianli
	  (2018-08-26).
	* include/nuttx/compiler.h, include/poll.h:  Add logic to determine if
	  the compiler supports anonymous structures and unions.  From Gregory
	  Nutt (2018-08-26).
	* Move psock check from [get|set]sockopt to psock_[get|set]sockopt
	  From Xiang Xiao (2018-08-26).
	* net/Kconfig: Uncomment the prompt of NET_SLIP_PKTSIZE  From Xiang
	  Xiao (2018-08-26).
	* net/tcp/tcp_monitor.c:  Fix net unlock issue when tcp close.  This
	  bug could leave the net locked.  From zhangyuan7 (2018-08-26).
	* netdev_findby_ipv[4|6]addr return netdev_default() as last resort but
	  don't return loopback device if another network device is in the UP
	  state.  From Xiang Xiao (2018-08-26).
	* net/socket/getsockname.c:  Add psock_getsockname function  From Xiang
	  Xiao (2018-08-26).
	* net/netdev/netdev_ioctl.c:  Add si_ioctl callback and
	  net_ioctl_arglen so usrsock could forward the ioctl to the remote
	  end  From dongjianli (2018-08-26).
	* include/nuttx/net/ethernet.h:  Remove CONFIG_NET_ETHERNET guard  From
	  Xiang Xiao (2018-08-26).
	* net/usrsock/:  Correct of semaphore usage issues.  From Gregory Nutt
	  (2018-08-26).
	* net/usrsock:  Combine some the duplicated logic.  From Xiang Xiao
	  (2018-08-26).
	* net/usrsock/usrsock.h:  Fix re-definitions of struct iovec.  From
	  ligd (2018-08-26).
	* net/usrsock:  Optimize option dependence  From Xiang Xiao (2018-08-26).
	* net/usrsock:  Add the listen/accept/getpeername/ioctl support  From
	  dongjianli (2018-08-26).
	* net/icmp/icmp_conn.c and net/icmpv6/icmpv6_conn.c:  Change the type
	  of id in icmpv[6]_findconn to uint16_t  From Xiang Xiao (2018-08-26).
	* net/icmp and icmpv6:  Fix failure to poll ICMP socket issue.  From
	  dongjianli (2018-08-26).
	* include/nuttx/fs/fs.h:  ... conflicting types for file_fstat().  From
	  Gregory Nutt (2018-08-26).
	* include/crc64.h: fix warning: integer constant is too large for its
	  type  From Xiang Xiao (2018-08-27).
	* include/nuttx/fs/binfs.h: Fix warning:  Type defaults to 'int' in
	  declaration of 'mountpt_operations'  From Xiang Xiao (2018-08-27).
	* include/nuttx/compiler.h: fix warning: __cplusplus is not defined.
	  Some gcc derived compiler do not define __cplusplus  From Xiang Xiao
	  (2018-08-27).
	* include/nuttx/kmalloc.h:  Add {kumm/kmm}_calloc API.  Add calloc API
	  for manage user memory and kernel memory in Flat Build/Kernel Build
	  without kernel heap.  From zhuyanlin (2018-08-27).
	* include/queue.h:  Add dq_tail marco  From zhuguangqing (2018-08-27).
	* include/spawn.h:  Fix posix_spawnattr_destroy warning:  'the address
	  of attr will always evaluate as true'  From Xiang Xiao (2018-08-27).
	* include/nuttx/i2c/i2c_master.h:  Add the standard speed macros.  From
	  dongjiuzhu (2018-08-27).
	* Move clock_timespec_[add|subtract] to include/nuttx/clock.h  From
	  Xiang Xiao (2018-08-27).
	* include/nuttx/semaphore.h: don't include nuttx/fs/fs.h.  (1) Avoid
	  nested loops if CONFIG_SIG_EVTHREAD enabled, (2) semaphore.h doesn't
	  depends on fs.h.  From Gregory Nutt (2018-08-27).
	* include/nuttx/semaphore: apply the semaphore wait function
	  nxsem_wait_uninterruptible().  The function
	  nxsem_wait_uninterruptible() is a wrapped version of nxsem_wait(),
	  which is uninterruptible and convenient for use.  From liuhaiyang
	  (2018-08-27).
	* include/nuttx/mutex.h:  Add inline wrapper functions to more clearly
	  support semaphores when used as mutexs.  From QianWenfa (2018-08-27).
	* include/sys/types:  Move wint_t and wctype_t from wchar.h to
	  types.h.  This change is compatible as before since wchar.h include
	  types.h indirectly.  This fixes a compilation error with newlib's
	  math.h:  'unknown type name wint_t'  From Xiang Xiao (2018-08-27).
	* include/nuttx/nuttx.h:  Added nuttx.h header file which is analogous
	  to the linux.h header file.  Currently, it contains on the definition
	  of the container_of() macro.  From zhuyanlin (2018-08-27).
	* Kconfig:  Move 'option modules' from NSH_FILE_APPS to BUILD_LOADABLE
	  From anchao (2018-08-27).
	* drivers/crypto: Move dev_urandom.c into new crypto folder.  From
	  Xiang Xiao (2018-08-27).
	* drivers/pwm:  Move pwm.c into pwm folder  From Xiang Xiao (2018-08-27).
	* drivers/audio:  Move the I2S character driver to a dedicated folder.
	  From Xiang Xiao (2018-08-27).
	* arch/arm/src/stm32/stm32f30xxx_i2c.c:  Fix compile error with I2C
	  reset  From Juha Niskanen (2018-08-27).
	* include/nuttx/audio/audio.h: Change member samp of apb to pointer so
	  driver can customize sample buffer allocation  From ZhongAn
	  (2018-08-27).
	* libs/libc/audio/lib_buffer.c:  Call nxsem_destroy in apb_free  From
	  Xiang Xiao (2018-08-27).
	* include/nuttx/audio/audio.h:  Add ioctl cmd 'AUDIOIOC_SETBUFFERINFO'
	  so user space could config the buffer  From ZhongAn (2018-08-27).
	* nuttx/audio:  Add hardware format support  From anchao (2018-08-27).
	* include/nuttx/audio/i2s.h:  Add i2s_rxchannels and i2s_txchannels
	  methods to the I2S lower half interface.  From ZhongAn (2018-08-27).
	* drivers/audio/audio_i2s.c:   Add audio_i2s device driver.  From
	  ZhongAn (2018-08-27).
	* audio/audio_comp.c:  Add the composite audio driver  From Xiang Xiao
	  (2018-08-27).
	* driver/ioexpander:  Add gpio_pin_unregister function to GPIO driver
	  driver/ioexpander:  Add pinset struct to GPIO driver for interrupt
	  pins larger than 64
	  driver/ioexpander:  Initialize pintype/inttype when registering
	  ioexpander device
	  driver/ioexpander:  Add SETPINTYPE ioctl command to the GPIO driver
	  From zhuyanlin (2018-08-27).
	* drivers/serial/Kconfig:  It is no longer necessary to restrict Ctrl-C
	  handling to the FLAT build
	  sched/signal:  Add a new configuration option to select signal
	  default actions, separate handling of signal default actions from
	  both task startup logic and from the serial TTY Ctrl-C logic.  Add a
	  signal set in the group structure to keep track of what signals have
	  been set to the default action.  In dispatching signals in PROTECTED
	  or KERNEL mode, use this signal set to determine if the default
	  signal handler is attached and dispatch the signal in kernel mode for
	  the default actions.  From Gregory Nutt (2018-08-27).
	* drivers/timers/arch_timer.c: implement timer arch API on top of timer
	  driver interface
	  drivers/timers/arch_alarm.c:  Implement alarm arch API on top of
	  oneshot driver interface
	  drivers/timers/arch_rtc.c:  Implement RTC arch API on top of RTC
	  driver interface
	  include/nuttx/timers/rtc.h:  Extend struct rtc_time by adding
	  tm_nsec if RTC supports hiresolution time.  From Xiang Xiao
	  (2018-08-27).
	* sched/signals:  Update the signal default action logic to support
	  sigaction().  signaction() must be able to handle and input action
	  of SIG_DFL to setup the default signal action; it mast also return
	  SIG_DFL it is replacing the default action.  From Gregory Nutt
	  (2018-08-27).
	* drivers/power: PM: Add pm_stay and pm_relax function so special
	  apps(e.g. mediaplayer) could disable suspend during playback much like
	  linux kernel counterpart  From Xiang Xiao (2018-08-27).
	* drivers/power:  PM: Add pm_querystate function  From zhuguangqing
	  (2018-08-27).
	* drivers/power/: PM: Don't update the power state in work thread:
	  (1) Simplify the code logic and remove the work queue dependence,
	  (2) Power calculation is too simple to delay into the work queue
	  From Xiang Xiao (2018-08-27).
	* drivers/pm: PM: Decrease the power state in the reverse order.
	  Since the child driver need power off before parent driver.  From
	  zhuguangqing (2018-08-27).
	* drivers/power: PM:  Make power manager service available as soon as
	  possible:  (1) Initialize g_pmglobals at the definition, (2) skip
	  hold the lock if OS isn't ready  From Xiang Xiao (2018-08-27).
	* drivers/pm: PM:  Add PM_RESTORE to notify driver that device exit
	  WFI so the driver could restore state.  For example, WDT may stop
	  counting before enter low power state and restore the counting again
	  in PM_RESTORE notification  From zhuguangqing (2018-08-27).
	* drivers/power: PM:  Add timer to decrease PM level automatically
	  From ligd (2018-08-27).
	* sched/signal: Default Signal Actions.  Change some types to
	  superficially simplify.  Add configuration options to enabled
	  default signal behaviors on a per-signal basis.  I don't think users
	  are prepared for SIGALRM to terminate the task (which is the correct
	  default behavior if you don't change it).  Extend the implementation
	  of default signals so that it is totally table driven and extensible
	  by simply mondifying the content of const tables.  From Gregory Nutt
	  (2018-08-27).
	* drivers/power/pm_register.c: Fix an error found in build testing.
	  From Gregory Nutt (2018-08-27).
	* drivers/mtd:  Add gd25 driver  From wangyanjiong (2018-08-28).
	* include/limits.h and include/sys/types.h:  Fix warning about
	  'SIZE_MAX' redefined.  include/nuttx/usb/audio.h: Fix warnings due
	  to '-' used whete '_' intended.  From Xiang Xiao (2018-08-28).
	* drivers/mtd/mtd_partition.c:  Copy the partition name to internal
	  buffer so that the caller can free the name argument  From Xiang
	  Xiao (2018-08-28).
	* drivers/mtd/ftl.c:  Support initialization of an FTL block device
	  with a custom name  From Xiang Xiao (2018-08-28).
	* fs/partition/fs_partition.c:  Add PTABLE parser
	  fs/partion:  Add a partition parser framework
	  fs/driver/fs_blockpartition.c:  Add register_blockpartition for
	  block partition  From Xiang Xiao (2018-08-28).
	* drivers/mtd/ftl.c:  Reduce size of stack buffer from 64 to a maximum
	  size as determined from NAME_MAX  From Gregory Nutt (2018-08-28).
	* drivers/serial:  Integrate new Ctrl-C logic with the ISIG flag in
	  the termios c_lflag.  Fix several compiler errors resulting from
	  recently flurry of renaming.  From Gregory Nutt (2018-08-28).
	* sched/signal:  Add support for SIGINT in addition to SIGKILL.
	  drivers/serial:  Use SIGINT instead of SIGKILL when control-C is
	  pressed.  From Gregory Nutt (2018-08-28).
	* sched/signal:  Add logic and an interface to determine if a signal
	  can be caught or ignored.  sigaction now correctly returns EINVAL on
	  any attempt to catch or ignore such signals (only SIGKILL for now
	  and only if CONFIG_SIG_DEFAULT=y).  From Gregory Nutt (2018-08-28).
	* configs/boardctl.c:  Add support for board_app_finalinitialize()
	  From ligd (2018-08-28).
	* configs/metro-m4/nsh/defconfig:  Correct RAM size  From Gregory Nutt
	  (2018-08-28).
	* arm/armv7-r:  Add general interrupt controller.  This is based on
	  armv7-a gic controller code.
	  arm/armv7-r:  Add invalidate dcache in arm_head.S.
	  arm/armv7-r:  Fix some wrong configuration of program status
	  register.  PSR_E_BIT bit should be set for big endian system.
	  PSR_A_BIT bis is set automatically as arm cortex-r4 reference manual
	  3.7.4. So we don't need to set this bit.
	  arm/armv7-r: Fix some wrong MPU register definition. Change
	  MPU_RBAR_ADDR_MASK and MPU_RACR_TEX_SHIFT mask as arm cortex-r4
	  reference manual.  Region Base Address Register 0-4 bits are
	  reserved.  MPU Region Access control register type 3-5 bits.
	  driver/mtd: fix compilation error.  From EunBong Song (2018-08-29).
	* drivers/audio/audio_i2s.c: Fix bad NULL pointer check  From Juha
	  Niskanen (2018-08-29).
	* sched/group/group_killchildren.c:  In some circumstances,
	  group_killchildren() could have called pthread_cancel() to kill a
	  task.  Also, the behavior would not be as expected if a pthread had
	  cancellation disabled.  sched/signal/sig_default.c:  Correct signal
	  handling in the multiple threaded case.  The SIGKILL signal may
	  actually be processed on a pthread, not the main thread of the
	  task.  From Gregory Nutt (2018-08-29).
	* drivers/serial/serial_dma.c: Fix typo error in uart_recvchars_dma()
	  From Xiang Xiao (2018-08-29).
	* net/arp/arp_out.c:  Fix some backward logic in an if condition.
	  From Gregory Nutt (2018-08-29).
	* sched/signal/sig_default.c:  Lock the scheduler while while killing
	  the children so that we do not lose priority and let the task group
	  continue to run in an indeterminate state.  From Gregory Nutt
	  (2018-08-29).
	* sched/signal:  This adds support for default signal actions for
	  SIGSTOP, SIGSTP, and SIGCONT"
	  Add procfs support to show stopped tasks.  Add nxsig_action() to
	  solve a chicken and egg problem:  We needed to use sigaction to set
	  default actions, but sigaction() would refuse to set actions if the
	  default actions could not be caught or ignored.
	  Add configuration option to selectively enabled/disable default
	  signal actions for SIGSTOP/SIGSTP/SIGCONT and SIGKILL/SIGINT.  Fix
	  some compilation issues.
	  sched/sched:  If a task/thread was already blocked when
	  SIGSTOP/SIGSTP was received, it will restart in the running state.
	  It will appear that to the task/thread that the blocked condition was
	  interrupt by a signal and returns the EINTR error.  From Gregory
	  Nutt (2018-08-30).
	* arch/arm/src/lpc43xx:  Make WWDT usable again.  LPC43xx WWDT driver
	  was not updated when irq_dispatch grew an argument parameter.  Also
	  fixes two typos and a naming inconsistency (WWDT vs. WWDG).  From
	  Jakob Haufe (2018-08-30).
	* arch/arm/src/samd5e5:  Updates to clock configuration from initial
	  testing.  With these changes the boot up gets through clock
	  configuration but hangs in the low-level USART configuration before
	  completing the boot.  From Gregory Nutt (2018-08-31).
	* arch/arm/src/stm32f7:  Add up_stackcheck.c  From Daniel Agar
	  (2018-08-31).
	* stm32h7/stm32_serial.c: don't include stm32_dma.h  From raiden00pl
	  (2018-09-01).
	* drivers/sensors/dhtxx.c: Driver for DHTxx sensor.
	  configs/olimex-stm32-p407:  Add board support for the DHTxx sensor.
	  From Ouss4 (2018-09-01).
	* arch/arm/src/samd5e5/sam_lowputc.c:  Only the console USART was
	  begin enabled.  From Gregory Nutt (2018-09-01).
	* arch/arm/src/samd5e5:  Correct some bad addresses in the memory
	  map.  From Gregory Nutt (2018-09-01).
	* configs/metro-m4:  Fix RxD PAD selection.  Add a configuration
	  option to use OSCULP32K instead of XOSC32K.  From Gregory Nutt
	  (2018-09-01).
	* configs/metro-m4:  Fix RxD interrupt pin selection.  The number
	  SERCOM interrupts do not refer to PAD numbers, but to bit positions
	  in the INFLAG register (very tiny footnote in the data sheet).  With
	  with final fix, the basic NSH configuration appears fully
	  functional.  From Gregory Nutt (2018-09-01).
	* configs/metro-m4:  Verify the CMCC and enable it by default in the
	  NSH configuration.  From Gregory Nutt (2018-09-01).
	* configs/metro-m4:  Fix problem with SysTick timer running too fast.
	  This turned out to be a dumb typo in board.h that was providing the
	  wrong CPU frequency to the SysTick setup logic.  From Gregory Nutt
	  (2018-09-02).
	* arch/arm/src/stm32h7:  Remove old references to RXDMA.  Add
	  configuration option to select the Rx FIFO threshold level.  From
	  Gregory Nutt (2018-09-02).
	* sched/: Update signal default STOP action.  If waitpid was called
	  with the WUNTRACED then wake up waitpid().  From Gregory Nutt
	  (2018-09-02).
	* drivers/serial:  Add support for Ctrl-Z.  This works just like the
	  recently added Ctrl-C support except that SIGSTP is sent when the
	  Ctrl-Z characters is encountered vs. SIGINT.  From Gregory Nutt
	  (2018-09-02).
	* configs/b-l475e-iot01a/src:  Fix copy paste errors in names:
	  stm32_bringup->stm32l4_bringup.  Noted by Freemans Goden.  From
	  Gregory Nutt (2018-09-04).
	* configs/b-l475e-iot01a/src:  Add timer driver support.  From Goden
	  Freemans (2018-09-04).
	* arch/arm/src/stm32f7:  Port the low-level PM functions to STM32F7.
	  From Juha Niskanen (2018-09-04).
	* tools/Makefile.unix:  Was not cleaning up export directory if it was
	  left from a failed export.  configs/sama5d4-ek/README.txt:  Update.
	  From Gregory Nutt (2018-09-04).
	* tools/mkexport.sh:  Save the name of the STRIP tool too.  From
	  Gregory Nutt (2018-09-04).
	* arch/arm/src/stm32l4:  Add getstatus and getperiod() method to the
	  timer driver (includes coding standard changes made prior to
	  commit)  From Goden Freemans (2018-09-05).
	* configs/:  apps/netutils/ping has been removed.  Ping support is now
	  provided by apps/system/ping.  Remove references to
	  -CONFIG_NETUTILS_PING or change them to CONFIG_SYSTEM_PING with
	  CONFIG_NET_ICMP_SOCKET=y  From Gregory Nutt (2018-09-05).

7.27 2018-11-14 Gregory Nutt <gnutt@nuttx.org>

	* mm/iob:  Add an IOB notifier that will send a signal to any registered
	  threads that want to be notified when an IOB has been freed.  This is an
	  untested work-in-progress and is intended to be a part of a larger solution
	  to correctly handling network poll operations.  From Gregory Nutt
	  (2018-09-08).
	* sched/signal:  Add a generic signal notification facility.  Modify the
	  custom IOB available notifier so that it is now just a wrapper around this
	  generic signal notification.   This generic signal notification facility
	  will, eventually, be used to support network polling.  From Gregory Nutt
	  (2018-09-09).
	* net/tcp and udp:  Add logic to signal events when TCP or UDP read-ahead
	  data is buffered.  From Gregory Nutt (2018-09-09).
	* net/netdev:  Add signal notification for the case where the network goes
	  down.  From Gregory Nutt (2018-09-09).
	* sched/signal:  In signal notification facility, use sigqueue() to notify
	  vs. kill().  With sigqueue(), we can pass more info (but still not enough).
	  From Gregory Nutt (2018-09-09).
	* Signals were not a good choice of IPC to implement the poll function for
	  several reasons:  In order to handle the asynchronous poll-related event, a
	  substantial amount of state information is needed.  Signals are only capable
	  of passing minimal amounts of data.  There are also complexities with
	  performing kernel space signal handlers in kernel space code that is better
	  to avoid.  So, instead of signals, the equivalent logic was converted to run
	  via a callback that executes on the high-priority work queue.  From Gregory
	  Nutt (2018-09-09).
	* net/TCP:  Extend the TCP notification logic logic so that it will also
	  report loss of connection events.  From Gregory Nutt (2018-09-09).
	* arch/arm/src/lpc43xx: Fix Ethernet TX_EN pin definitions.  TX_EN on
	  LPC43xx can be routed via P0.1 and PC.4 in both MII and RMII mode.  Before,
	  P0.1 was hard-coded for MII and PC.4 was hard-coded for RMII.  Also, the
	  definitions used inconsistent naming (TXEN vs. TX_EN).  From Jakob Haufe
	  (2018-09-10).
	* sched/wqueue:  Notifier design cleanup.  The original concept used
	  pre-allocated notification data structures.  However, the notification data
	  must persist for an indeterminate amount of time.  So the design was
	  modified to use dynamically allocated data structures.  This commit
	  simplifies the design by removed some residual 'machinery' that is no longer
	  needed.  From Gregory Nutt (2018-09-10).
	* sched/sched/sched_waitpid.c: Remove a bad error check.  From Gregory Nutt
	  (2018-09-10).
	* mm/iob and sched/semaphore:  Work around some issues with the IOB throttle
	  semaphore.  It has some odd behaviors that can cause assertions in
	  sem_post().  Also, it seems to get outside of its range occasionally.  Need
	  to REVISIT this.  From Gregory Nutt (2018-09-10).
	* sched/wqueue:  Add an option to work queue notifier so that the
	  notification can occur on different work queues.  From Gregory Nutt
	  (2018-09-11).
	* This patch prevent heap corruption as in below case.

	  TASK A                        TASK B
	  malloc()
	  mm_takesemaphore()
	  heap holder is set to TASK B
	  <--- preempt
	  ...
	  task_exit()
	  Set to current task to
	  TASK B
	  Try to release tcb, and
	  stack memory
	  free()
	  mm_takesemaphore()
	  - Successfully obtain
	  semaphore because current
	  task and heap holder is
	  same.
	  Free memory....
	  Heap corrupt.

	  This change forces all de-allocations via sched_kfree() and sched_ufree()
	  to be delayed.  Eliminating the immediate de-allocation prevents the
	  above problem with the the re-entrant semaphore because the deallocation
	  always occurs on the worker thread, never on TASK B.

	  There could be consequences in the timing of memory availability.  We
	  will see.  From EunBong Song (2018-09-11).
	* mm/iob:  IOB free notifier should accept the work queue ID as a
	  parameter.  The notification may need to run on either the high- or low-
	  priority work queue.  sched/work:  Change the default priority of the
	  low-priority work queue to 100.  From Gregory Nutt (2018-09-11).
	* net/tcp and net/udp:  In the POLLOUT poll logic, request an immediate Tx
	  poll from the network device bound to the socket.  This obviously cannot
	  work if there is not single device bound to the network device.  From
	  Gregory Nutt (2018-09-11).
	* kinetis:  i2c On failed reset re-init i2c and clocking.  If a reset fails,
	  we still must reinitializes the i2c block so that subsequent transfers will
	  not cause a hard-fault due to the clock being off.  If that transfer fails
	  it can try to reset again.  From David Sidrane (2018-09-11).
	* net/tcp/tcp_netpoll.c:  Add logic to receive notifications when IOBs are
	  freed (Needs CONFIG_NET_TCP_WRITE_BUFFERS and CONFIG_IOB_NOTIFIER).  At
	  present, does nothing because the logic in in psock_tcp_cansend() does not
	  check for the availability of IOBs.  That will change.  From Gregory Nutt
	  (2018-09-11).
	* mm/iob:  iob_navail() was returning the number of free IOB chain queue
	  entries, not the number of free IOBs.  Completely misnamed.  From Gregory
	  Nutt (2018-09-12).
	* net/tcp/tcp_netpoll.c:  Add logic to receive notifications when IOBs are
	  freed (Needs CONFIG_NET_TCP_WRITE_BUFFERS and CONFIG_IOB_NOTIFIER).  At
	  present, does nothing because the logic in in psock_tcp_cansend() does not
	  check for the availability of IOBs.  That will change.

	  mm/iob:  iob_navail() was returning the number of free IOB chain queue
	  entries, not the number of free IOBs.  Completely misnamed.

	  net/tcp/tcp_send_buffered.c:  Extend psock_tcp_cansend() so that it also
	  requires that at least on IOB is also available.

	  net/tcp/tcp_netpoll.c:  tcp_iob_work() needs to free the allocated
	  argument when it is finished.

	  sched/wqueue/kwork_notifier.c:  Redesign some data structures.  struct
	  works_s must appear at the beginning of the notifier entry structure.
	  That is because it contains the work queue indexes.  This solves a
	  hard-fault issue.  From Gregory Nutt (2018-09-12).
	* net/udp/udp_netpoll.c:  Port TCP poll changes to UDP.  From Gregory Nutt
	  (2018-09-12).
	* tools/Config.mk:  Fix an error in RWILDCARD implementation  From Anthony
	  Merlino (2018-09-12).
	* mm/iob:  Add a divider that can be used to reduce the rate of IOB
	  notifications.  From Gregory Nutt (2018-09-13).
	* tools/Directories.mk:  Correct the path to the installed libcxx
	  directory.  From Gregory Nutt (2018-09-13).
	* fs/smartfs/smartfs_smart.c:  Current sector should have a space for next
	  entry size.  If not, we should move to next sector.  From EunBong Song
	  (2018-09-14).
	* task/task_restart.c:  Restarted with sigprocmask set.  Should have been
	  cleared.  Noted by Jeongchan Kim  From Gregory Nutt (2018-09-14).
	* net/usrsock:  Revert commit 'net/usrsock:  Optimize option dependence'.
	  Re-allow combination of usrsock and NuttX TCP/IP stack.  For example, in
	  case device has Ethernet and mobile connectivity and NuttX TCP/IP stack is
	  used when configured to use Ethernet connection and usrsock when
	  configured to use modem (modem TCP/IP stack through usrsock).  From Jussi
	  Kivilinna (2018-09-14).
	* libs/libc/wqueue/work_usrthread.c:  Eliminate a race condition noted by
	  Xiang Xiao.  Use sigprocmask() so that we do not lose a signal.  From
	  Gregory Nutt (2018-09-14).
	* fs/vfs/fs_open.c:  Add nx_open() which is the same as open() except that
	  it does not create a cancellation point nor does it modify the errno
	  variable.

	  many locations:  Change occurrences of open() followed by file_detach() to
	  file_open().  Change most non-controversial calls to open() to nx_open().

	  fs/inode/fs_fileopen.c:  Add file_open() implementation with some interim,
	  placeholder logic.  From Gregory Nutt (2018-09-15).
	* include/nuttx/fs/fs.h:  Fix some backward parameters in a new macro
	  definition.  From Gregory Nutt (2018-09-15).
	* Replace calls to ioctl() in the OS to file_ioctl()  From Gregory Nutt
	  (2018-09-15).
	* configs/stm32l4r9ai-disco/src/stm32_adc.c:  Replace calls to ioctl() in
	  the OS to file_ioctl()  From Gregory Nutt (2018-09-15).
	* Rename file_close_detached() to just file_close() for better consistency
	  in naming.  From Gregory Nutt (2018-09-15).
	* fs/inode/fs_fileclose.c:   Move file_close() a separate file.  It no
	  longer makes sense for it to cohabitate with file_detach().  From Gregory
	  Nutt (2018-09-15).
	* configs/b-l475e-iot01a/include/b-l475e-iot01a_clock.h:  Correct timer
	  source clock frequencies.  From Freemans Goden (2018-09-16).
	* tools/tesbuild.sh:  No longer installs and builds the NxWidgets
	  libraries.  They are now a port of apps/.  From Gregory Nutt (2018-09-16).
	* I2C support for STM32H7

	  - stm32h7/chip.h:  Update peripherals
	  - stm32h7x3xx_rcc.h:  Update definitions
	  - stm32h7x3xx_rcc.c:  Remove some unused code and configure I2C clocks
	  - stm32h7: add lower half I2C driver (based on F7 I2C driver)
	  - configs/nucleo-h743zi: Add LSM303AGR and LSM6DSL configuration
	  - sensors/lsm303agr.c, sensors/lsm6dsl.c: add missing include, remove
	    whitespace  From raiden00pl (2018-09-16).
	* libs/libc/math:  Add variable convergence in log() and logf() to avoid
	  hangs caused by failure to converge for very specific input values.

	  libs/libc/math:  Small change to log() and logf() that improves accuracy
	  and convergence time  From Rajan Gill (2018-09-16).
	* drivers/timers:  RTC_PERIODIC is no longer EXPERIMENTAL, remove
	  unimplemented EXPERIMENTAL RTC configuration variables.  From Juha
	  Niskanen (2018-09-17).
	* C library:  Add some new functions defined in POSIX.1-2017:  stpncpy(),
	  strsignal(), psignal(), psiginfo().  From Gregory Nutt (2018-09-17).
	* libs/libc/string/lib_stpncpy.c:  Correct the return pointer value for the
	  case where the NUL terminator is transferred.  From Gregory Nutt
	  (2018-09-18).
	* drivers/usbdev: Fix buffer overrun check in rndis.c.  The rndis driver has
	  been working since 13 Nov 2017.  However, I finally found that it depends
	  on network and buffer configurations.  If a receiving TCP packet is
	  divided into smaller ones based on USB max packet size, this condition
	  check works correctly.  From Masayuki Ishikawa (2018-09-20).
	* - mtd/progmem: change up_progmem_npages to up_progmem_neraseblocks

	  page is a unit for read/write operation.
	  eraseblock is a unit for erase operation.
	  up_progmem_npages is a little bit confusing because it returns number of
	  erase blocks in flash memory. This patch changes up_progmem_npages to
	  up_progmem_neraseblocks. There is no logical change.

	  - mtd/progmem: up_progmem_erasesize.

	  Change argument name to be more readable.

	  - mtd/progmem: up_progmem_eraseblock

	  Change up_progmem_erasepage to up_progmem_eraseblock.
	  eraseblock is more readable name than erasepage.

	  - mtd/progmem: change up_progmem_eraseblock's return value.

	  up_progmem_eraseblock erase a block. so it's better to return the erase block
	  size than page size.

	  - arm/cortex-r : fix wrong cp15_flash_dcache.

	  change mcrne to mcr for unconditional dcache.  From EunBong Song (2018-09-21).
	* arch/arm/src/armv7-a:  Replicate the same fix was previously committed for
	  the armv7-r.  From Gregory Nutt (2018-09-20).
	* arch/arm/src/lc823450: Fix up_allocate_heap() in
	  lc823450_allocateheap2.c.  For lc823450, heap area in flat build mode must
	  start just after  _eronly.  Because bss/data area is allocated in lower
	  address than text area in SRAM. See ld.scripts for details. Also, this
	  change removes unused up_allocateheap.c  From Masayuki Ishikawa
	  (2018-09-21).
	* arch/arm/src/stm32f7:  Remove adhoc PM interfaces and add CONFIG_PM serial
	  suspend.  From Gregory Nutt (2018-09-21).
	* arch/arm/src/kinetis:  Remove all attempts to reprioritize interrupts.
	  From Gregory Nutt (2018-09-21).
	* arch/arm/src:  Correct all ARMv7-M architectures.  Interrupts were not be
	  disabled correctly on power up.  Writing zero to the NVIC SET-ENABLE
	  registers has no effect.  In order to disable interrupts, it is necessary
	  to write all ones to the NVIC CLEAR-ENABLE register.  Noted by David
	  Sidrane.  From Gregory Nutt (2018-09-21).
	* net/tcp/tcp_recvwindow.c:  In order to receive data we must not only have
	  IOBs available, but we must also have at least one IOB chain qentry
	  available.  Otherwise, we will advertise that we an buffer a lot of data
	  when, in fact, we cannot.  This is an experimental fix to a performance
	  problem noted by Masayuki Ishikawa.  From Gregory Nutt (2018-09-22).
	* fs/driver:  Add support for named MTD drivers in the pseudo file system.
	  This will, eventually, allow us to mount file systems that need MTD
	  drivers without having to fake an intervening block driver.
	  fs/driver and fs/mount:  Add mount() support for file systems that require
	  MTD drivers (vs. block drivers).  From Gregory Nutt (2018-09-22).
	* include/sys/socket.h:  Renumber the socket types.  They must begin at 1,
	  not zero. Socket type zero has a special meaning for some interfaces.  For
	  example, getaddrinfo() uses a socket type of zero to many any type of
	  socket.  The is no standard name for the any-type-socket, but macOS uses
	  SOCK_UNSPEC.  NuttX will do the same.  Issue noted by Anthony Merlino.
	  From Gregory Nutt (2018-09-24).
	* Brings in an initial port of version 0.3.7 of Peter Anderson's SPIFFS
	  flash file system into NuttX.  From Gregory Nutt (2018-09-24).
	* arch/arm/src/imxrt/imxrt_enet.c:  The board would not come up if I ran
	  Nuttx from cold. I dumped the PHY registers to see what the differences
	  were and the PHY was coming up in NANDTree mode. This is a mode for
	  testing connectivity between the PHY and the MAC.  Switching this mode off
	  in the PHY registers has fixed the problem.  From Dave Marples (2018-09-25).
	* net/tcp/tcp_wrbuffer.c:  Fix buffer release handling on failed buffer
	  alloc.  Attempt to release write buffer on failed TCP write I/O buffer
	  alloc and tryalloc failed to wrb->wb_iob assertion.  From Harri Luhtala
	  (2018-09-25).
	* drivers/net/enc28j60.c:  Adjust debug trace levels.  Correct typos in some
	  comments.  From Harri Luhtala (2018-09-25).
	* A few improvements to getaddrinfo:  (1)  Use the protocol and socktype
	  hints in returned address, (2) Ignore AI_PASSIVE argument if hostname is
	  not NULL  From Anthony Merlino (2018-09-25).
	* Fixes issue with libcxx build.  This was changed multiple times, but
	  should be fixed now.  From Anthony Merlino (2018-09-25).
	* include/nuttx:  Fix definitions used to access OS functions within the
	  libraries.  In the FLAT build, we must always set the errno and/or create
	  cancellation points because the same library functions are used within the
	  OS as are used by applications.  This could cause issues for the OS but
	  corrects some problems at the user interface.  Noted by Federico
	  Braghiroli in Bitbucket issue 121.  From Gregory Nutt (2018-09-26).
	* arch/arm/src/imxrt:  Add LPI2C driver.  From Ivan Ucherdzhiev (2018-09-26).
	* arch/arm/src/imxrt/imxrt_lpsrtc.c:  SVNC LPCR register bits 0 & 1 are NOT
	  reserved and are, in fact, needed to enabled the SRTC.  Now the SRTC is
	  working.  From Ivan Ucherdzhiev (2018-09-26).
	* arch/arm/src/imxrt/imxrt_enet.c:  Fix a race condition in setting up the
	  Ethernet Tx transfer.  From Dave Marples (2018-09-26).
	* arch/arm/src/lc823450: MPU support for FLAT build  From Masayuki Ishikawa
	  (2018-09-27).
	* Corrections for the i.MXRT Ethernet:

	  (1) Now the Ethernet is completely re-initialized when an error occurs by
	      means of taking the interface down and back up but the PHY is _not_
	      renegotiated for that case because that is very time consuming and an
	      error in the Ethernet is no reflection on the state of the PHY anyway.
	  (2) Explicitly sets the expected PHY address to zero (this could be moved
	      into the config) rather than searching for it which takes ages, and
	      it's zero anyway for this board (that's the broadcast address, and
	      anything that cannot respond on that has multiple PHYs, so that would
	      be a new board).
	  (3) Allows for the renegotiation of the PHY to be optional when a reset is
	      needed. If a non-renegotiated reset doesn't result in good comms to
	      the PHY then it'll automatically be escalated to a renegotiated one.
	  (4) Only performs a reset for errors that need it (the CRITICAL_ERROR
	      define).  The list of errors that need reset are somewhat arbitrarily
	      chosen based on my prejudices and might need to be revisited, but
	      certainly the jabber errors don't need reset, the partial packet is
	      thrown away by the layer above anyway.
	  (5) Re-loads the multicast table on reset.
	  (6) Adds a bit more logging into the imxrt Ethernet module.  From Dave
	      Marples (2018-09-28).
	* fs/spiffs:  SPIFFS is basically functional although still immature.  From
	  Gregory Nutt (2018-09-28).
	* drivers/leds/max7219.c:  Support all digits presented in the MAX7219
	  datasheet.  From Alan Carvalho de Assis (2018-09-29).
	* fs/procfs/fs_procfsproc.c:  Change output of the env file so that it looks
	  more like output from the 'env' command.  Documentation/NuttShell.html:
	  Document the new NSH 'env' command.  From Gregory Nutt (2018-09-30).
	* sched/environ/env_unsetenv.c:  Fix and error in unsetenv() when unsetting
	  the last of the environment variables.  From Gregory Nutt (2018-09-30).
	* Documentation/NuttShell.html:  Update document to describe the 'export'
	  command, the CONFIG_NSH_VARS setting, and the effect of this setting on
	  the behavior of the 'set' and 'unset' commands. Add description of the
	  PATH environment variable.  From Gregory Nutt (2018-10-01).
	* EFM32, STM32 (FS/HS), STM32F7, and STM32L4 OTGFS/HS:  Th epin_configure()
	  function used the same eptype as the TxFIFO number for all endpoints.
	  This should probably be the physical EP number, not the EP type.
	  Suggested by Key Two.  From Gregory Nutt (2018-10-02).
	* libs/libc/stdio/lib_sscanf.c: Fix conversion for format specifiers that
	  appear right after a floating point format specifier.   When performing a
	  floating point conversion the parsing code could consume more than
	  required characters from the input buffer. This made impossible to convert
	  input of form "1.1K" using format "%f%c".  Fix the issue by advancing the
	  input buffer with the actual characters converted as a float point
	  number.  From Mihai Serban (2018-10-03).
	* stm32h7/rcc: update rcc defs, add SPI clock configuration and some fixes
	  in rcc
	  stm32h7: initial defs for SPI
	  stm32h7: initial defs for MDMA, DMA, BDMA and DMAMUX
	  From raiden00pl (2018-10-04).
	* stm32_tim.c: don't use hard-coded UIF interrupt in some functions  From
	  raiden00pl (2018-10-04).
	* configs: add support for nucleo-f302r8 board  From raiden00pl (2018-10-05).
	* libs/libc/stdio:  Remove CONFIG_NOPRINTF_FIELDWIDTH.  That option does,
	  indeed, make the printf family of functions much smaller.  But it also
	  adds a lot of complexity and makes the functions non-standard.  Removing
	  this might break some of the tinier platforms but it is the best thing to
	  do for long term maintenance for for OpenGroup.org compliance.

	  libs/libc/stdio/lib_libvsprintf.c:  Resolves the integer field width
	  problem if Issue 35 for the cases of integer, long and long long integer
	  types.  The output now matches the output form glibc.  From Gregory Nutt
	  (2018-10-05).
	* configs/olimex-stm32-p407:  Added a HID keyboard configuration.  From
	  Gregory Nutt (2018-10-06).
	* configs/olimex-lpc1766stk:  Add support to initialize a USB HID keyboard.
	  Still don't have a working configuration.  Seems to require a lot of
	  transfer descriptors.  Also reorganized some logic.  It has been a long
	  time since the Olimex LPC1766-STK has had any TLC.

	  configs/olimex-lpc1766stk/hidkbd:  Add a configuration for testing the HID
	  keyboard.  From Gregory Nutt (2018-10-06).
	* drivers/wireless/ieee802.11:  Add capability for Broadcom chips to get
	  firmware and CLM data from a mounted file system vs. in-memory data
	  structures.  From Ramtin Amin (2018-10-07).
	* drivers/wireless/ieee802.11:  Extend Add capability to get firmware from a
	  mounted file system to BCM43362.  From Gregory Nutt (2018-10-07).
	* arch/arm/src/stm32f7/stm32_serial.c:  Force invalidation of data cache
	  after DMA re-enable when returning from low-power mode  From Juha Niskanen
	  (2018-10-09).
	* stm32f0, stm32f7, stm32h7, stm32l4 serial:  Fix use of
	  CONFIG_SERIAL_IFLOWCONTROL where CONFIG_SERIAL_OFLOWCONTROL was intended.
	  From Juha Niskanen (2018-10-10).
	* EFM32, Kinetis, BCM2708:  Juha Niskanen's fix related to
	  CONFIG_SERIAL_OFLOWCONTROL also applies to cloned logic in BCM2708, EFM32,
	  and Kinetis.  From Gregory Nutt (2018-10-10).
	* arch/mips/include/mips32/cp0.h:  Fix some copy-paste errors that cause
	  malformed comments and syntax errors when certain CP0 CONFIG1 bits are
	  referenced.  Note in Issue 123 by Anonymous.  From Gregory Nutt
	  (2018-10-12).
	* arch/arm/src/lpc43xx/lpc43_serial.c:  Fix copy-paste error:
	  g_usart1port->g_uart1port.  From Dave Marples (2018-10-12).
	* arch/arm/src/imxrt/imxrt_lpi2c.c:  Fixes 2 bugs in the for IMXRT1050: (1)
	  I2C time out and did not send STOP condition when sending single byte, (2)
	  I2C could not receive bytes after repeated start.  From Ivan Ucherdzhiev
	  (2018-10-13).
	* Improvements in STM32 PWM low level driver

	  stm32_pwm: remove some impossible PWM configurations
	  stm32_pwm: support for complementary outputs
	  stm32_pwm: deadtime configuration
	  stm32_pwm: output polarity and IDLE state configuration

	  nucleo-f302r8: pwm support
	  stm32f429i-disco: pwm support  From Mateusz Szafoni (2018-10-14).
	* stm32_pwm: break and lock configuration and some cosmetics  From Mateusz
	  Szafoni (2018-10-15).
	* arch/mips/src/pic32mz/pic32mz-serial.c:  Fix a typo in assignment of TTYS0
	  to UART6  From Ouss4 (2018-10-15).
	* arch/mips/src/pic32mz/pic32mz-head.S:  Initialize the global pointer in
	  all shadow sets.  From Ouss4 (2018-10-16).
	* arch/mips/src/mips32/Toolchain.defs:  Add toolchain flags for the pinguino
	  toolchain under Linux.  From Ouss4 (2018-10-16).
	* configs/pcblogic-pic32mx:  Remove support for the PCB Logic PIC32MX
	  board.  I do not find any references to PCB Logic on the web and I do not
	  believe that this breakout board is available any longer.  From Gregory
	  Nutt (2018-10-17).
	* drivers/mtd:  Add support to Macronix MX25LF25635F serial NOR flash  From
	  David Sidrane (2018-10-17).
	* drivers/mtd/s25fl1.c:  During a MTDIOC_GEOMETRY ioctl call, the driver was
	  incorrectly reporting the blocksize to be the same as the erasesize.  The
	  blocksize should be 256 (the page size).  This patch fixes that, and now
	  the SmartFS configration is working.  From Ken Pettit (2018-10-18).
	* configs/bambino-200e/include/board.h:  Correct calculation of SDMMC clock
	  configuration.  The LPC43 has no SDMMC source clock divider.  Error noted
	  by Dave Marples.  From Gregory Nutt (2018-10-18).
	* stm32 enable separate DMA per SPI configuration  From Daniel Agar
	  (2018-10-18).
	* drivers/sensors/ina226.c:  Add INA226 device driver.  From Daniel P.
	  Carvalho (2018-10-19).
	* configs/lpcxpresso-lpc54628/include/board.h:  Update logic used to
	  calculate SDMMC input clock divider.  From Gregory Nutt (2018-10-21).
	* Fix the LPC4330 family SDMMC card access. Some of these fixes (e.g. DELAY
	  register) may also be applicable elsewhere. These are _NOT_ extensively
	  tested, but they are certainly better than the current state of the
	  driver.  The fixes, specifically, are;

	  - Clocks were wrongly configured - way too fast because there is no
	    primary divider on LPC4330

	    This is fixed by means of changing the definitions in the board.h file.
	    I've edited the one for the lpc4330-xplorer board because I'm actually
	    working with Versiboard and don't want to contribute that config just
	    yet while I've still got the drains up on it.

	  - The LPC43_SDMMC_DELAY register was not being set

	    I suspect, in the 'real world', it's possible to get away without
	    setting this, but I've added a register definition, default value and
	    register access macros into arch/arm/src/lpc43xx/chip/lpc43_scu.h and
	    then used them in arch/arm/src/lpc43xx/lpc43_sdmmc.c.

	  - The LPC43_SDMMC_BLKSIZ and LPC43_SDMMC_BYTECNT registers had the wrong
	    values.

	    The management have already implemented a rather nice block level
	    interface for the stm32 so I've just re-used that to write to these
	    registers as required. I'm slightly nervous that accessing the
	    configuration registers (SCR being the prime example) which has a much
	    smaller block size may not be being done in the right way but it does
	    seem to work correctly, so let's assume it's all OK until someone tells
	    me otherwise.

	  These fixes have been tested with DMA-based read/write on a LPC4330. Speed
	  via nsh is pretty low but I'm assuming that's just a
	  buffering/implementation issue for now.  From Dave Marples (2018-10-21).
	* arch/arm/src/lpc54/lpc54_sdmmc:  Port Dave Marple's LPC43 USB DCD fix to
	  the LPC54 with appropriate naming changes.  From Gregory Nutt (2018-10-21).
	* arch/arm/src/stm32f7/stm32_flash.c:  Allow programming OTP blocks through
	  progmem interface  From Jussi Kivilinna (2018-10-22).
	* arch/arm/src/lpc54xx/lpc54_sdmmc.c:  Tested Dave Marple's LPC43 fix with
	  the LPC54.  The driver still does not work on the LPC54.  This commit adds
	  support for and SDMMC errata and setting of the delay register which was
	  missing in the previous commit.  It appears that now I can read the SD
	  card successfully, but I get CRC errors when writing to the card.  From
	  Gregory Nutt (2018-10-22).
	* arch/arm/src/lpc43xx/lpc43_sdmmc.c:  This commit corrects a problem in
	  lpc43_dmasendsetup().  There was no linked DMA descriptor code on the send
	  side.  The end result was stalls while sending multiple sectors.  This
	  commit adds that in and the send code is working much better.  From Dave
	  Marples (2018-10-23).
	* arch/arm/src/lpc54xx/lpc54_sdmmc.c:  This commit ports Dave Marple's DMA
	  fix for the LPC43 SD/MMC to the LPC54.  From Gregory Nutt (2018-10-23).
	* - imxrt:  Fix typos bit# and names
	  - imxrt:  wdog Registers are 16 Bits
	  - imxrt:  wdog Update has to be within 255 clocks of unlock
	  - imxrt:  clockconfig Fix comments
	  - imxrt1050-evk:  board.h Fix comments
	  - imxrt:  imxrt_ccm.h Define Mux Selects for board.h use
	  - imxrt:  clockconfig Allow better control from board.h

	    1) Allows a board config clock setting to be defined
	       in terms of the /n values shown in Figure 18-2.
	       Clock Tree of the i.MX RT1050 Processor Reference
	       Manual, Rev. 1, 03/2018
	    2) Allows the clock multiplex selection to be made in
	       The board config.

	  - imxrt1050-evk:  Define board clocking based on divisor and muxes
	  From David Sidrane (2018-10-23).
	* nuttx/drivers/usbdev/rndis.c:  Account for CONFIG_NET_GUARDSIZE in
	  allocation of packet buffer
	  nuttx/drivers/usbdev/rndis.c:  Make USB device parameters configurable
	  From Sakari Kapanen (2018-10-24).
	* nuttx/net/tcp/tcp_input.c: Fix recovery when ackseq > unackseq.  The
	  comment near this line says "reset the number of outstanding,
	  unacknowledged bytes".  However, the code actually resets the whole TCP
	  connection.  It was changed to the current form in commit f034d84ea1f with
	  no explanation of the intent. Recover the line to what it was before that
	  commit.  From Sakari Kapanen (2018-10-24).
	* libs/libc:  Correct some errors in psignal() and stpncpy().  From Lokesh B
	  V (2018-10-24).
	* configs/nucleo-l432kc/include/board.h:  Fix SPI pin definitions.  From
	  Daniel P. Carvalho (2018-10-24).
	* With these changes the SDMMC card for LPC4330 is now working properly BUT
	  it needs more testing, especially with different cards etc.  This code
	  should be applicable to all members of the lpc43xx family.

	  In addition to the problems that were previously identified there were a
	  few other bits and pieces outstanding;

	  - Timing was dependent on CPU speed rather than absolute time
	  - End of transfer handling was a bit mixed up
	  - It's possible for data to still be in the FIFO (i.e. not have reached
	    the card) when a next write is requested, so we need to wait for that to
	    complete
	  - Interrupt Status could be carried over from one transfer episode to the
	    next, corrupting progress
	  - Multi-descriptor DMA writing simply wasn't implemented, but there were no
	    indications ... it just failed silently  From Dave Marples (2018-10-24).
	* arch/arm/src/lpc54xx/lpc54_sdmmc.c:  Ported the last of Dave Marples fixes
	  to the LPC54.  Not yet verified.  From Gregory Nutt (2018-10-24).
	* drivers/wireless/ieee80211/bcmf_core.c:  There were two functions that
	  have a address issue.  In bcmf_read_sbreg and bcmf_write_sbreg,
	  SBSDIO_SB_OFT_ADDR_MASK should be used before map address space.  Noted by
	  Shao Li in Bitbucket issue #126.  From Gregory Nutt (2018-10-25).
	* configs/nucleo-l432kc:  Added support for AT45DB Serial Flash  From Daniel
	  P. Carvalho (2018-10-25).
	* drivers/wireless/ieee80211/bcmf_sdpcm.c:  Remove incorrect OR condition.
	  Always true, would always cause allocation failure.  Noted by Shao Li in
	  Issue 127.  From Gregory Nutt (2018-10-26).
	* arch/x86/src/qemu/qemu_head.S:  Correct .bss, IDLE stack, heap
	  organization.  From Gregory Nutt (2018-10-26).
	* net/sixlowpan: Fixes bug in uncompress_addr handling of odd postfix.  This
	  affected multicast compress/uncompress since it's the only logic that used
	  an odd postfix. The odd byte needs to be handled first, not last.  From
	  Anthony Merlino (2018-10-27).
	* Fixes logic in ipv6_input to handle more than ff02::/16 multicast
	  addresses. Don't forward mcast packets if scope is not appropriate  From
	  Anthony Merlino (2018-10-27).
	* Adds extern "C" guard in include/net/if.h  From Anthony Merlino
	  (2018-10-27).
	* Adds definitions for IPPROTO_IPV6 socket options to netinet/in.h Adds
	  missing fields to sockaddr_in6.  Adds struct ipv6-mreq.  These changes all
	  follow the opengroup standard for netinet/in.h  From Anthony Merlino
	  (2018-10-27).
	* include/sys/socket.h:  With increased size of struct sockaddr_in6 of
	  commit 55f31f03f9cca55b8b94ebf31cef3f501d8d76cf, the size of struct
	  sockaddr_storage in include/sys/socket.h must also be increase so that it
	  can contain the new, larger sockaddr_in6.  From Gregory Nutt (2018-10-27).
	* libs/libc/misc/lib_crc8ccitt.c:  Adds implementation of CRC8-CCITT.  From
	  Alan Carvalho de Assis (2018-10-27).
	* Add basic SPI support for H7

	  - stm32h7: basic SPI support (nodma, noirq)
	  - nucleo-h743zi: nrf24l01 support
	  - nrf24l01.c: fix compilation errors
	  - stm32h7x3xx_rcc.c: enable SYSCFG clock  From Mateusz Szafoni (2018-10-28).
	* arch/arm/stm32: add support for STM32F303xD/E; configs: add basic support
	  for nucleo-f303ze  From Mateusz Szafoni (2018-10-28).
	* include/netinet/in.h:  Per OpenGroup.org, type of sin_port in struct
	  sockaddr_in must be in_port_t vs uint16_t.  NOTE: in_port_t is typdef'ed
	  as uint16_t anyway.  Plus additional cosmetic changes for things like long
	  lines.  From Gregory Nutt (2018-10-28).
	* include/netinet/in.h:  Add IPv4 SOL_IP socket options for symmetry with
	  IPv6 definitions added in a previous commit.  None of the socket options
	  have been implemented!  From Gregory Nutt (2018-10-28).
	* include/netinet/in.h:  Add other definitions required by OpenGroup.org.
	  From Gregory Nutt (2018-10-28).
	* drivers/sensors/mlx90614.c:  Add support for the Infrared Thermometer
	  MLX90614  From Alan Carvalho de Assis (2018-10-28).
	* configs/stm32f4discovery/src/stm32_mlx90614.c:  Add MLX90614 support for
	  the STM32F4Discovery board  From Alan Carvalho de Assis (2018-10-28).
	* include/sys/sockio.h, net/netdev/netdev_ioctl.c:  Fix a recently compile
	  error introduced with commit that added the semi-standard ip_msfilter
	  structure to netinet/in.h.  However, there was a non-standard version of
	  that structure in sys/sockio.h.  This commit removes the non-standard
	  version of struct ip_msfilter and adapts the IOCTL and device lookup logic
	  in net/netdev to work with the new, semi-standard version in
	  netinet/in.h.  From Gregory Nutt (2018-10-29).
	* This commit brings in support for the GAP8 architecture.  The GAP8 is a
	  1+8-core DSP-like RISC-V MCU.  Also included is support for the Gapuino
	  GAP8 evaluation board.  From hhuysqt (2018-10-30).
	* Fixes Kconfig options to include all STM32F20XX processors, not just
	  STM32F207

	  - arch/arm/src/stm32: Fixes Kconfig options to include all STM32F20XX
	    processors, not just STM32F207
	  - arch/arm/src/stm32: Removes redundant STM32_STM32F429 depends from
	    Kconfig. STM32F4XXX already does this

	  From Anthony Merlino (2018-10-31).
	* include/nuttx/net/mld.h:  Add MLD header file based on RFC2710 and
	  RFC3810.  From Gregory Nutt (2018-10-31).
	* arch/arm/src/imxrt:  Add full support for the LPSPI in poll mode; includes
	  a minor fix for LPI2C.  From Gregory Nutt (2018-10-31).
	* net/mld:  Add basic build structure for Multicast Listener Discovery
	  (MLD).  No yet functional.  From Gregory Nutt (2018-10-31).
	* Add new configuration CONFIG_NET_MCASTGROUP.  This option is selected
	  automatically if either CONFIG_NET_IGMP or CONFIG_NET_MLD are selected.
	  Most conditional logic based on CONFIG_NET_IGMP replaced with conditioning
	  on CONFIG_NET_MCASTGROUP.  From Gregory Nutt (2018-10-31).
	* net/inet:  Add framework to support IPv4 and IPv6 protocol socket options
	  (i.e., SOL_IP and SOL_IP6).  Handling of these socket options is a
	  necessary step on the way to future ICMPv6 MLD support.  From Gregory Nutt
	  (2018-10-31).
	* net/inet/ipv4_setsockopt.c:  Add implementation for all IPv4 socket
	  options that have implemented IOCTL command counterparts.  From Gregory
	  Nutt (2018-10-31).
	* configs/imxrt1050-evk/src:  Previous committed implemented atypical
	  SPI-based MMC/SD card support conditioned on CONFIG_MMCSD.  This is, of
	  course, incorrect and interferes with the implementation of correct MMC/SD
	  card support using the correct SDIO-based peripheral.  This commit renames
	  that atypical support to *mmcsd_spi* and conditions using that atypical
	  support on CONFIG_MMCSD_SPI with should then not interfere with the
	  correct MMC/SD support that can be conditioned on CONFIG_MMCSD_SDIO.  From
	  Gregory Nutt (2018-10-31).
	* arch/arm/src/imxrt/imxrt_usdhc.c:  Initial commit of the i.MXRT SDHC
	  driver.  This driver is partially functional, working in PIO mode.  DMA
	  support and additional testing are needed.  From Dave Marples (2018-10-31).
	* This change is needed specifically for the case where a boot loader sets
	  the SPE bit before starting NuttX.  In that case, the test in the SPI
	  driver is bogus.  This change fixes that by assuring that NuttX has booted
	  and initialized at least once (whether or not SPE is set) before the
	  driver starts refusing to initialize.

	  arch/arm/stm32*: Don't rely on SPI_CR1_SPE to determine if peripheral has
	  been initialized yet.  From Anthony Merlino (2018-11-01).
	* Xbee getset txpwr

	  - drivers/wireless/ieee802154/xbee: Minor improvements to debug facilities.
	  - drivers/wireless/ieee802154/xbee: Add support for setting/getting tx
	    power.

	  From Anthony Merlino (2018-11-01).
	* net/mld:  Initialize implementation of MLD.  From Gregory Nutt (2018-11-01).
	* include/nuttx/net/ipv6ext.h:  Create header file with all of the
	  definitions of IPv6 extension headers that I could find.
	  net/mld/mld_send.c:  Correct the size and format of the Hop-to-hop, Router
	  alert extension header.  From Gregory Nutt (2018-11-01).
	* drivers/sensors/mlx90614.c:  Fix MLX90614 to re-flash new device address
	  From Alan Carvalho de Assis (2018-11-02).
	* net/inet/ipv6_setsockopt.c:  Implement the IPV6_JOIN_GROUP and
	  IPV6_LEAVE_GROUP socket options.

	  net/devif/ipv6_input.c and net/icmpv6/icmpv6_input.c:  Add logic to skip
	  over the variable number of IPv6 extension headers that may be present
	  between the IPv6 header and the transport layer header.  The extension
	  headers are simply ignored.  This is necessary because with MLD, certain
	  incoming messages may have, at a minimum, a Router Alert Hop-by-hop
	  extension header.

	  net/devif, net/tcp, and net/udp:  Extend so that all support Transport
	  protocols supported by IPv6 can handle the presence of IPv6 header
	  extension options.  From Gregory Nutt (2018-11-02).
	* net/mld:  Updates from comparison with roughly leveraged code and the MDL
	  RFCs 2710 and 3810.

	  net/mld:  Defer all timeout-related operations to the work queue vs.
	  handling within the timer interrupt.  Need to notify the device driver for
	  an immediate poll when there are MLD packets waiting to be sent.  From
	  Gregory Nutt (2018-11-03).
	* net/igmp:  Backport some MLD design improvements/fixes.  From Gregory Nutt
	  (2018-11-04).
	* net/mld:  Implement MLDv1 compatibility mode.  This completes coding of
	  MLD.  MLD is, however, still completely untested.  From Gregory Nutt
	  (2018-11-04).
	* net/mld:  Fix some compile errors fill debug info is enabled.  Fix some
	  errors in formatting the Listener report.  Still has a checksum error.
	  From Gregory Nutt (2018-11-04).
	* tools/configure.c: Add missing '\n' in printf statement

	  tools/configure.c: Add missed -g option to getopt() string

	  tools/configure.c and tools/configure.sh:  Fix Windows native pre-build
	  kconfig-conf incompatibility.  Looks like pre-built Windows native
	  kconfig-conf interprets "..\apps" as "..apps" (possibly '\a' as
	  escape-sequence) so expand winnative path to double-backslashed variant
	  "..\\apps".

	  tools/mkdeps.c:  Fix '\0' missing in MinGW.  Implicit bug. There are 2
	  cases.

	  1. Under Linux.  The code works as planned: '\n' is always replaced with
	     '\0' due to sprintf fills n-1 bytes and reaches buffer length limit.

	  2. Under Windows/MinGW. There is memory corruption.  Seems like it`s a bug
	     inside MinGW/snprintf.  Snprintf fills consecutively "oldbase",'
	     ',"str",'\n', but does not inserts trailing '\0' instead of '\n'.  And
	     when next append() occurs, strlen() returns garbage-appended "oldbase".

	  So the fix just removes '\n' and reserves space for '\0'.

	  tools/link.bat: Fix .fakelink creation

	  configs/Makefile and tools/Config.mk:  Move single file copy to the new
	  function COPYFILE.  This fixes the Windows native build case when there is
	  no cp or cp does not recognize Windows paths.  From Anatol Ivanov
	  (2018-11-05).
	* configs/nucleo-l432kc:  Add support for the INA226.  From Daniel P.
	  Carvalho (2018-11-05).
	* tools/Config.mk and tools/Makefile.win:  Force use 'cmd' for shell with
	  windows native build  From Anatol Ivanov (2018-11-06).
	* tools/Makefile.win/unix:  Staging directory (and its libraries) should be
	  removed on 'make clean' (issue noted by Dave Marples).  From Gregory Nutt
	  (2018-11-06).
	* net/procfs:  Add support to provide MLD stats at /proc/net/mld.  net/mld:
	  Fix a couple more bugs found in further MLD testing.  From Gregory Nutt
	  (2018-11-06).
	* Adding imxrt 106x

	  - imxrt:  Fix comment in imxrt105x_memorymap
	  - imxrt:  Add imxrt1060 memory map
	  - imxrt:  Add imcrt106x to imxrt_memorymap
	  - imxrt:  Add i.MX RT 106x to Kconfig
	  - imxrt:  Moved IMXRT_GPIO_NPORTS to chip.h & fixed comments
	  - imxrt:  105x IRQ fix comment
	  - imxrt:  gpioirq GPIO4,5 using wrong boundary
	  - imxrt:  Add RT106x irq headers & Kconfig
	  - imxrt:  Add rt106x GPIO chip headers
	  - imxrt:  Extend Number of GPIO ports
	  - imxrt:  Add 106x DMAMUX header
	  - imxrt:  iomuxc add 106x
	  - imxrt:  106x iomuxc extend Indexes
	  - imxrt:  pinmux Add 106x
	  - imxrt:  clockconfig use imxrt_memorymap.h
	  - imxrt:  allocateheap use OCRAM2 as BASE when available

	  From David Sidrane (2018-11-06).
	* net/mld:  Implement 'Other Querier Present Timer'.  This timer is used to
	  revert to Querier mode if there is no other querier on the network.  Also,
	  fix some naming:  The Done message is not just Version 1 but is used with
	  Version 2 as well.  From Gregory Nutt (2018-11-07).
	* Reported by Anonymous in Bitbucket Issue #129:   When MIPS port is built
	  for microMIPS and then loaded as an application, the __start entry point
	  is entered in microMIPS mode, but the CPU core initialization code there
	  misses to set the config3ISAOnExc bit to 1. Subsequently, exceptions are
	  entered in MIPS32 mode, but the code base was built for microMIPS.  From
	  Gregory Nutt (2018-11-07).
	* sched/group/group_foreachchild.c:  group_foreachchild iterate by reverse
	  order since the callback(e.g. group_killchildren) may remove the tcb from
	  list

	  sched Kconfig and sched/task/exit.c:  Add SCHED_EXIT_KILL_CHILDREN option
	  to kill all child threads when the main thread of a task exits.  From
	  zhangyuan7 (2018-11-08).
	* binfmt/ and libs/libc:  Make exepath_*() more common:

	  1. Move exepath_*() related code to libc/misc
	  2. Rename exepath_ to envpath_
	  3. Rename BINFMT_EXEPATH to LIB_ENVPATH

	  libs/libc/modlib:  Add pre module library symbol table support.
	  From nchao (2018-11-08).
	* tools/csvparser.h:  Extend MAX_PARMSIZE to 256.  Fixes this issue:  70:
	  Parameter too long: ...  From Xiang Xiao (2018-11-08).
	* sched/signal/sig_suspend.c:  sigsuspend() shouldn't eat the pending signal
	  but dispatch all instead  From Xiang Xiao (2018-11-08).
	* sched/signal and syscall/:  Add support for pselect() and ppoll()
	  functions  From dongjianli (2018-11-08).
	* fs/aio, libs/libc/aio, sched/mqueue, sched/timer, and sched/signal:
	  Remove the code duplication for SIGEV_THREAD.  From Xiang Xiao (2018-11-08).
	* drivers/ioexpander:  Support multiple registrations of GPIO signal
	  events.  From Xiang Xiao (2018-11-08).
	* libs/libc/netdb/lib_dnsbind.c:  Make DNS receive timeout configurable.
	  From ligd (2018-11-08).
	* libs/libc/string/lib_memrchr.c:  Add memrchr() function  From Xiang Xiao
	  (2018-11-08).
	* libs/libc/stdio/lib_libvsprintf.c:  Eliminate recursive in conversion
	  functions of lib_vsprintf().  From Xiang Xiao (2018-11-08).
	* fs/partition:  Try MTDIOC_GEOMETRY IOCTL before bops's geometry
	  fs/driver/fs_blockpartition.c:  Support MTD IOCTL  From Xiang Xiao
	  (2018-11-08).
	* drivers/mtd and other MTD drivers:  Remove mtd_procfsoperations since we
	  can now get the same information from inode  From Xiang Xiao (2018-11-08).
	* fs/mount/fs_mount.c mount:  Add support for mounting a file system with
	  either a block or an MTD driver.  From Xiang Xiao (2018-11-08).
	* fd/dirent, fs/driver/, and fs/vfs:  Make MTD device accessible via a
	  character driver proxy like block devices  From Xiang Xiao (2018-11-08).
	* fs/driver: Add register_mtdpartition() for MTD partition  From Xiang Xiao
	  (2018-11-08).
	* fs/procfs:  Add /proc/version support to get version info  From iuhaitao
	  (2018-11-08).
	* drivers/serial/uart_16550.c:  Fox UART flow control issue.  UART_MCR_RTS
	  need be high even UART_MCR_AFCE is enabled  From zhangyuan7 (2018-11-08).
	* drivers/serial/uart_16550.c:  Remove disabling of interrupts in
	  up_earlyserialinit.  up_irqinitialize() already disable all interrupts
	  From ligd (2018-11-08).
	* drivers/timers/arch_alarm.c: Fix alarm ISR error when no
	  CONFIG_SCHED_TICKLESS
	  drivers/timers/arch_alarm.c: Use uint64_t to avoid alarm 32-bit overflow
	  From ligd (2018-11-08).
	* drivers/timers:  Simplify the error handling in arch rtc/alarm/timer
	  wrapper  From Xiang Xiao (2018-11-08).
	* imxrt:Clock config fixes and board.h sets sources and divisors

	  - imxrt:clockconfig bug fix & Board config set clocks

	    Fixed logic that was not clearing bits as ~ was
	    missing in &= mask operations.

	    Use values from the board.h file so set the Mux that
	    selects the clock sources.

	    Use board defined PODF values to select clock.

	    Only configure USDHC2 clocks when board defines clocks.

	  - imxrt1050-evk:  Board setting used to set  LSPI and USDHC Clocks
	  From David Sidrane (2018-11-09).
	* NuttX: Add DFU Runtime driver for activating boot-loader through USB
	  command.  From Petteri Aimonen (2018-10-31).
	* NuttX: USB Composite and DFU drivers: Add support for Microsoft OS
	  descriptors.

	  These Microsoft-only descriptors help in loading the correct driver on
	  Windows.  They are especially helpful to give libusb access to a custom
	  device without having to manually configure/install WinUSB driver.

	  With this change DFU interface works automatically on Windows 10 with
	  dfu-util 0.9 and libusb 1.0.22. On Windows 7 it still appears to need
	  driver installation.  From Petteri Aimonen (2018-11-02).
	* NuttX: STM32F407VG has only one DAC.  NDAC=2 causes compilation error when
	  trying to use e.g. STM32_DAC1_CR macro.  From Petteri Aimonen (2018-11-09).
	* RNDIS composite support

	  - NuttX usb/composite.h: Forward-declare composite_devdesc_s.

	    This avoids "error: conflicting types for 'composite_initialize'"
	    on some versions of GCC. Because of the cross-inclusion between
	    usbdev.h and composite.h, the full declaration is not always
	    available.

	  - NuttX: USB Composite driver: Fix strid comparison

	    The last string ID used by composite driver is 4, and
	    the number of IDs used is 5 (0..4). The comparison
	    strid <= COMPOSITE_NSTRIDS caused composite driver to
	    reply with -EINVAL for id 5, even though it should be
	    available for sub-devices to use.

	  - NuttX: RNDIS USB driver: Add support for composite configuration.
	  From Petteri Aimonen (2018-11-09).
	* FAT improvements

	  - NuttX: Add CONFIG_FAT_LFN_ALIAS_HASH to speed up creating long filenames.

	    Long filenames on FAT file systems have associated 8.3 character alias
	    short filenames. The traditional form of these is FILENA~1.EXT with
	    a running count of the number of similar names. However creating this
	    unique count can take several seconds if there are many similarly named
	    files in the directory. Enabling FAT_LFN_ALIAS_HASH uses an alternative
	    format of FI0123~1.TXT where the four digits are a hash of the original
	    filename. This method is similar to what is used by Windows 2000 and
	    later.

	  - NuttX: Add CONFIG_FAT_LFN_ALIAS_TRAILCHARS alternative format for 8.3
	    filenames.

	    Traditional format for long filename 8.3 aliases takes first 6
	    characters of long filename. If this option is set to N > 0,
	    NuttX will instead take first 6-N and last N characters to form
	    the short name. This is useful for filenames like "datafile12.txt"
	    where the first characters would always remain the same.

	  - NuttX: FAT32: Fix file date corruption in fat_truncate().

	  - NuttX: if SD card wait seems to be a long one, give time for other
	    threads to run.  From Petteri Aimonen (2018-11-09).
	* max11802: Fix compilation errors and allow setting PULL and SAMPLE
	  registers.  From Petteri Aimonen (2018-11-09).
	* imxrt Add imxrt1060-evk

	  - imxrt1050-evk:  Fix typo
	  - imxrt1050-evk:  Use naming for flash types that match documentation
	  - imxrt1050-evk:  Fix typo
	  - imxrt:Add imxrt1060-evk board support

	  From David Sidrane (2018-11-09).
	* drivers/rwbuffer.c:  Fix a lock issue  From Xiang Xiao (2018-11-09).
	* rivers/rwbuffer.c:  Don't queue work to flush write buffer if
	  CONFIG_DRVR_WRDELAY == 0  From Xiang Xiao (2018-11-09).
	* drivers/rwbuffer.c: Improve the rwb_read/write overlap performance  From
	  zhuyanlin (2018-11-09).
	* drivers/mtd/ftl.c:  Support BIOC_FLUSH ioctl  From Xiang Xiao (2018-11-09).
	* drivers/mtd/ftl.c:  Make READAHEAD and WRITEBUFFER work independently of
	  each other.  There have cases we use writebuffer but not readbuffer, so
	  the write buffer must be flushed before read.  Let rwb driver do it.  From
	  zhuyanlin (2018-11-09).
	* drivers/mtd/ftl.c:  Allocate eblock only when it's really needed  From
	  Xiang Xiao (2018-11-09).
	* drivers/mtd/ftl.c:  Add support support unlink operation to avoid the
	  memory leak  From Xiang Xiao (2018-11-09).
	* drivers/mtd/mtd_partition.c:  Remove the hard code partition name length
	  From Xiang Xiao (2018-11-09).
	* drivers/syslog/vsyslog.c:  nx_syslog's return value should include the
	  timestamp length  From Xiang Xiao (2018-11-09).
	* drivers/syslog/syslog_flush.c:  Uncomment the g_syslog_channel->sc_flush
	  call  From Xiang Xiao (2018-11-09).
	* drivers/syslog/syslog_putc.c:  Call sc_force in idle task even interrupt
	  buffer enabled.  The following cases may hang randomly in the bring up
	  phase: (1) boot up process and (2) suspend/resume process.  Either case
	  runs in the idle task context, so it's difficult to debug the hang issue
	  if these output go through the interrupt buffer.  From Xiang Xiao
	  (2018-11-09).
	* drivers/syslog:  Ensure interrupt log doesn't interlace in normal log.
	  Don't call syslog_putc in syslog_default_write because syslog_putc will
	  try to empty the interrupt buffer every time.  From Xiang Xiao (2018-11-09).
	* drivers/syslog:  syslog_initialize initialize dev/syslog too and call
	  syslog to add the prefix and timestamp  From Xiang Xiao (2018-11-09).
	* include/netdb.h  Add NO_ADDRESS definition  From zhangyuan7 (2018-11-09).
	* Fix typographical error in endian.h and resource.h  From anchao
	  (2018-11-09).
	* Fixes warnings from header files:

	  - include/nuttx/clock.h:  Fix uptime wrong if DEBUG_FEATURES and
	    SCHED_TICKLESS enabled
	  - iinclude/nuttx/arch.h: fix CONFIG_ARCH_INTERRUPTSTACK not defined  warning
	  - iinclude/nuttx/audio/audio_i2s.h:  Fix warning: struct i2s_dev_s declared
	    inside parameter list

	  From Xiang Xiao (2018-11-09).
	* arch/sim/src/up_hostfs.c:  Support S_IFSOCK, DT_LNK, O_DIRECT and O_SYNC
	  From Xiang Xiao (2018-11-09).
	* sched/wdog: improve accuracy of wd_gettime() in tickless mode  From ligd
	  (2018-11-09).
	* sched/wdog:  Improve accuracy of wd_gettime() in tickless mode  From ligd
	  (2018-11-09).
	* include/nuttx/fs/fs.h:  Register_mtddriver should depend on CONFIG_MTD not
	  CONFIG_MTD_PARTITION  From Xiang Xiao (2018-11-09).
	* drivers/net/lan91c111.c:  Reuse lan91c111_reply for ARP case  From Xiang
	  Xiao (2018-11-09).
	* drivers/net/slip.c:  Add IPv6 support and fix minor issue  From Xiang Xiao
	  (2018-11-09).
	* drivers/net/tun.c:  Call ipv[4|6]_input dynamically by checking packet
	  header and remove the code duplication  From Xiang Xiao (2018-11-09).
	* arch/arm/src/stm32l4:  Add initial support for STM32L412 and STM32L422
	  chips  From Juha Niskanen (2018-11-09).
	* Remove deletion of Eclipse project files from make distclean target per
	  request of David Sidrane.  From Gregory Nutt (2018-11-09).
	* net/udp/udp_finddev.c:  Fallback to netdev_default device if the device is
	  not found, rather than arbitrary using the device at the head of the list
	  of devices.  From Xiang Xiao (2018-11-09).
	* Fix compiler error and warning when CONFIG_NET_SENDFILE=y  From Xiang Xiao
	  (2018-11-09).
	* net/tcp/tcp_backlog.c:  Add SOMAXCONN definition and implementation per
	  OpenGroup.org.  From zhangyuan7 (2018-11-09).
	* net/arp and net/icmpv6: don't call d_txavail directly since it may point
	  to NULL  From Xiang Xiao (2018-11-09).
	* net/:  Add NET_ICMP[v6]_NO_STACK for usrsock case  From Xiang Xiao
	  (2018-11-09).
	* net/usrsock/usrsock_accept.c: Mark newconn ready before issue accept
	  request to avoid the event get discarded due to the socket in the invalid
	  state  From Xiang Xiao (2018-11-09).
	* libs/libc/net:  Add basic implementation for recvmsg() and sendmsg() per
	  OpenGroup.org specification.  From ligd (2018-11-09).
	* include/netinet/in.h:  Add Linux IP_PKTINFO and IPV6_PKTINFO definitions,
	  but not yet realized.  From Gregory Nutt (2018-11-09).
	* include/net and include/sys:  Align the constant values with values in the
	  Linux kernel which makes targeting the usrsock server to Linux kernel
	  easier.  From Xiang Xiao (2018-11-09).
	* include/arpa/inet.h:  Remove the dup INET[6]_ADDRSTRLEN from arpa.inet.h
	  already define in netinet/in.h  From Xiang Xiao (2018-11-09).
	* net/arp: Redesign ARP table aging to simplify the net initialization  From
	  Xiang Xiao (2018-11-09).
	* net/arp/arp_send.c:  Check ifname match before sending packet.  From Xiang
	  Xiao (2018-11-09).
	* Remove duplicate definition in nuttx/net/arp.h and
	  include/nuttx/net/ioctl.h  From Xiang Xiao (2018-11-09).
	* net/: Remove the unnecessary arp.h inclusion  From Xiang Xiao (2018-11-09).
	* net/neighbor: Simplify the neighbor table aging process  From Xiang Xiao
	  (2018-11-09).
	* net/neighbor/neighbor_dumpentry.c:  Simplify neighbor_dumpentry()
	  implementation  From Xiang Xiao (2018-11-09).
	* net/neighbor:  neighbor_lookup() checks if the target IP belongs to one of
	  the local network devices.  From Xiang Xiao (2018-11-09).
	* net/neighbor: Support neighbor_out() for multiple link layer at the same
	  time  From Xiang Xiao (2018-11-09).
	* net/:  Fix some compile errors introduce with recent networking patches.
	  Found in build testing.  From Gregory Nutt (2018-11-09).
	* net/icmpv6/icmpv6_neighbor.c:  icmpv6_neighbor() shouldn't use the out of
	  scope variable(dripaddr)  From Xiang Xiao (2018-11-09).
	* net/icmpv6/icmpv6_conn.c:  icmpv6_free() remove reference count operation
	  since it's already done in icmpv6_close().  From Xiang Xiao (2018-11-09).
	* net/icmpv6/icmpv6_linkipaddr.c:  Encapsulate the link scope address
	  generation into icmpv6_linkipaddr()  From Xiang Xiao (2018-11-09).
	* net/icmpv6:  Remove the coupling between ICMPv6 and Ethernet by moving all
	  Ethernet stuff to neighbor_ethernet_out.c and make the mac address as
	  first field.  From Xiang Xiao (2018-11-09).
	* net/arp and icmpv6:  Double the delay time on each iteration for ARP/ICMP
	  to fight work jitter better.  From Xiang Xiao (2018-11-09).
	* net/icmpv6, neighbor, and netdev:  Rename netdev_dev_lladdrsize() to
	  netdev_lladdrsize() and move the prototype to include/nuttx/nex/netdev.h,
	  giving is global scope within the OS.  Reviewer:  This degrades the
	  integrity of the modular architecture by introducing a new coupling via C
	  function call.  Not a good thing at all.  From Xiang Xiao (2018-11-09).
	* net/devif/ipv6_input.c:  Fix a logic error when the received IPv6 srcaddr
	  is a multicast address.  Exiting logic only supported UDP multicast.  But
	  MLD and certain other ICMPv6 packets also require acceptance of multicast
	  packets.  From Gregory Nutt (2018-11-09).
	* drivers/timers/arch_rtc.c:  up_rtc_set_lowerhalf call clock_synchronize()
	  for external RTC.  From Xiang Xiao (2018-11-09).
	* net/icmpv6/icmpv6_autoconfig.c and icmpv6_rnotify.c:  Don't take the
	  network device down when reconfiguring only the IP address from within
	  ICMPv6 logic.  Recommended by Xiang Xiao in order to avoid the long
	  delays of bringing some networks back up.

	  Normally it is required that the network be in the "down" state when
	  re-configuring the network interface.  This is thought not to be a
	  necessary here because.

	  1. The ICMPv6 logic here runs with the network locked so there can be no
	     outgoing packets with bad source IP addresses from any asynchronous
	     network activity using the device being reconfigured.
	  2. Incoming packets depend only upon the MAC filtering.  Network drivers
	     do not use the IP address; they filter incoming packets using only the
	     MAC address which is not being changed here.

	     From Gregory Nutt (2018-11-10).
	* drivers/power/pm_initialize.c:  Fix pm_domain_s.stime unintialize caused
	  time error.  Bug detail:

	  1. open CONFIG_DEBUG_FEATURES CONFIG_SYSTEM_TIME64 CONFIG_CLOCK_MONOTONIC
	     ==> INITIAL_SYSTEM_TIMER_TICKS very big data, not zero
	  2. close CONFIG_SCHED_TICKLESS
	     ==> use g_system_timer as system clock
	  3. pm_domain_s.stime init to zero
	  4. clock_systimer() - pm_domain_s.stime get big data, error

	  From ligd (2018-11-10).
	* drivers/power/pm:  Use the start time of state btime to calculate thrcnt;
	  remove the loop whose count may be very big after the long idle  From
	  ligd (2018-11-10).
	* net/udp/Kconfig: Auto-select CONFIG_WQUEUE_NOTIFIER when
	  CONFIG_UDP_READAHEAD_NOTIFIER is selected.  From Gregory Nutt (2018-11-10).
	* /net/devif/ipv6_input.c:  Correct handling of IPv6 extension headers.
	  The main confusion was that the payload length in the IPv6 header does
	  not include its extension headers.
	  net/icmpv6/icmpv6_input.c:  Correct calculation of the ICMPv6 header
	  address
	  net/mld/mld_query.c:  Correct back test for group found.
	  net/mld/mld_report.c: Fix host vs. network order problem.
	  net/mld/mld_send.c: Correct the address used in sending the General
	  Query.  It should be the unspecified address in that case.
	  net/MLD:  The MAS query should be sent on the group multicast address.
	  net/mld:  There is an issue with the general query timer design.  There
	  should be a single instance, not a per-group instance of the timer (ditto
	  for the v1 compatibility timer).  Fall back for now and use the per-group
	  MAX query.
	  From Gregory Nutt (2018-11-10).
	* arch/sim/src/up_netdriver.c: Fix error 'invalid operands to binary &'
	  From Xiang Xiao (2018-11-10).
	* arch/arm/src/common/up_exit.c:  Fix typo.  Caused compiler error when
	  system debug enabled.  From Xiang Xiao (2018-11-10).
	* arch/:  Add 'BOARD_ASSERT_RESET_VALUE' in config/Kconfig and replace
	  reboot status '0' to 'CONFIG_BOARD_ASSERT_RESET_VALUE'.  From Gregory
	  Nutt (2018-11-10).
	* net/mld:  Resolve and issue with sending reports from multiple groups in
	  the same polling cycle.  From Gregory Nutt (2018-11-11).
	* The MLD implementation did not follow the RFC correctly when it is the
	  Querier.  The Querier should use a general query and get query messages
	  from all members of all groups.  This would be driven by a single timer
	  per sub-net since all groups are queried at once. Instead, the design
	  used a Multicast Address Specific Query with one timer per group and
	  ignores groups that we are not members of.

	  Similarly, the MLDv1 compatibility timer should be a single, separate
	  timer, not a per-group timer.

	  net/mld: Group may be NULL when sending a general query

	  From Gregory Nutt (2018-11-11).
	* net/mld:  Fix logic error when testing for the case where all members
	  have left the group.  From Gregory Nutt (2018-11-11).
	* arch/arm/src:  Remove general register dump from fault handler since the
	  same info already dump in PANIC  From Xiang Xiao (2018-11-11).
	* arch/ assertions files:  up_registerdump capture the general register if
	  not yet saved and up_saveusercontext is implemented, the register dump is
	  very useful to find the cause of failure.  From Xiang Xiao (2018-11-11).
	* arch/ all assertion functions:  up_stackdump() dump the full stack if
	  stack overflow the stack info is very useful to find the backtrace  From
	  Xiang Xiao (2018-11-11).
	* arch/ all assertion functions:  up_assert() move the register dump to
	  first make the more important info first  From Xiang Xiao (2018-11-11).
	* net/procfs/netdev_statistics.c:   Eliminate warning:  array subscript is
	  above array bounds.  From Gregory Nutt (2018-11-11).
	* Move NETDEV_LATEINIT from drivers/net/Kconfig to net/Kconfig so that we
	  can select NETDEV_LATEINIT without enabling NETDEVICES since the net
	  driver in arch folder may need to initialize later too.  From Xiang Xiao
	  (2018-11-12).
	* sched/clock/clock_getres.c:  Support CLOCK_MONOTONIC  From Xiang Xiao
	  (2018-11-12).
	* sched/clock/:  Remove g_monotonic_basetime and g_clock_monotonic_time
	  since we don't need ensure monotonic time start from zero as state here:
	  http://pubs.opengroup.org/onlinepubs/009696899/functions/clock_getres.html
	  From Xiang Xiao (2018-11-12).
	* sched/clock/:  Don't call up_timer_gettime in clock_gettime() and
	  clock_systimer() to ensure the return value from them consistent with
	  clock_systimespec  From Xiang Xiao (2018-11-12).
	* sched/clock/clock_initialize.c:  clock_inittime() needs to be done with
	  CONFIG_SCHED_TICKLESS and clock_initialize should skip clock_inittime()
	  for external RTC case since the RTC isn't ready yet.  From Xiang Xiao
	  (2018-11-12).
	* sched/clock/ timekeeping:  Use clock_basetime() to initialize
	  g_clock_wall_time to get the best initial RTC value and initialize
	  g_clock_last_counter too since the hardware may not start counting from
	  zero.  From Xiang Xiao (2018-11-12).
	* libc libnx updates

	  - NuttX: make strerror() return 'Success' for 0

	  - NuttX: fix strrchr() so that it considers null terminator as part of
	    string

	    From strrchr(3) man page:  "The terminating null byte is considered
	    part of the string, so that if c is specified as '\0', these functions
	    return a pointer to the terminator."

	  - NuttX: mm_free(): Add DEBUGASSERT()'s to catch memory corruption early.

	    It's easier to find the source when asserts fail already when freeing
	    an overflowed buffer, than if the corruption is only detected on next
	    malloc().

	  - MM_FILL_ALLOCATIONS: Add debug option to fill all mallocs()

	    This is helpful for detecting uninitialized variables,
	    especially in C++ code. I seem to be forgetting to initialize
	    member variables and then they just get random values..

	  - NuttX: nxtk_bitmapwindow: Fix warning message when bitmap is fully
	    off-screen.

	  - nxfonts_getfont: Avoid unnecessary warnings for other whitespace chars
	    also.

	  - NuttX: Fix kerning of 'I' in Sans17x22 font

	    The I character was running together with some other
	    characters, e.g. in sequence "IMI".

	  - NXMU: Re-validate window pointer for mouse events.

	    NXMU caches the previous window pointer so that further mouse
	    events can be sent to the same window. However, if the window
	    is destroyed while mouse button is held down, the pointer may
	    become invalid and cause a crash. This patch revalidates the
	    pointer before using it.

	    From Petteri Aimonen (2018-11-12).
	* stm32/stm32_adc: major refactor

	  - stm32/stm32_adc: use STM32 ADC IP core version and ADC available
	    functions instead of chip family names in conditional compilation

	  - stm32/chip: replace family specific ADC headers with STM32 ADC IP core
	    version headers

	  - stm32/stm32_adc: configurable sample time supported for all chips, not
	    only L1

	  - stm32/stm32_adc: enable/disable interrupts supported for all chips, not
	    only L1

	  - stm32/stm32_adc: resolution configuration

	  - stm32/stm32f33xxx_adc: remove wrong assertion

	  - configs/nucleo-f303ze: support for ADC and ADC example

	  - configs/stm32f429i-disco: support for ADC and ADC example

	  From Mateusz Szafoni (2018-11-12).
	* arch/arm/src/imxrt:  This commit completes the interrupt driven USDHC1
	  functionality for the IMXRT EVKB. There is more work to be done to
	  complete DMA mode and further changes will follow.  From Dave Marples
	  (2018-11-12).
	* arch/arm/src/imxrt/imxrt_usdhc.c:  Improve SD card handling in the DMA
	  case.  For now I think we can consider this complete for both Interrupt
	  and DMA transfers. There is other stuff to add (high speed, low voltage,
	  DDR etc.) later,  From Dave Marples (2018-11-13).

7.28 2019-01-19 Gregory Nutt <gnutt@nuttx.org>

	* arch/arm/src/imxrt: Add PIT, GPT, and QIMER(TMR) header files  From David
	  Sidrane (2018-11-13).
	* libs/libc/netdb:  Make DNS retries configurable  From Juha Niskanen
	  (2018-11-14).
	* drivers/input/button_upper.c:  Fix two bad NULL checks  From Juha
	  Niskanen (2018-11-14).
	* Assertions:  Identify the running task correctly when dumping task state
	  information.  It takes time to switch to the target task after
	  g_readytorun has been modified.  If panic/assert happen during this
	  period, the dump will contain the incorrect and confusing information due
	  to the difference between the real running task and the return value of
	  this_task(). This change resolve this problem by adding g_running_task to
	  track the real running task through the context switch.  From Xiang Xiao
	  (2018-11-15).
	* arch/arm/src/stm32: STM32F446 & STM32F469 correct PC1 SPI assignments
	  From David Sidrane (2018-11-15).
	* arch/arm/src/imxrt:  Add FLEXPWM  From David Sidrane (2018-11-15).
	* libs/libc/netdb/lib_dnsquery.c:  Harden against DNS spoofing.  This
	  commit implements most of the RFC 5452 guidelines for making DNS more
	  resilient. We now verify response matches against what was queried and
	  use unpredictable query IDs. It is also checked that response come from
	  correct DNS server.  Also fixes a buffer overflow when querying hostnames
	  longer than CONFIG_NETDB_DNSCLIENT_NAMESIZE.  From Juha Niskanen
	  (2018-11-16).
	* fs/dirent:  Corrects a problem with opendir() noted by Petteri Aimonen in
	  Bitbucket Issue 132: "opendir() fails for FAT filesystem with trailing
	  slash in path".  I see the following behaviour on NuttX 7.26, where I
	  have SD card mounted on /flash and a directory called "frm" on it:

	    opendir("/flash")  returns  (DIR *) 0x1000c580
	    opendir("/flash/") returns (DIR *) 0x1000c5d0
	    opendir("/flash/frm")  returns (DIR *) 0x1000c620
	    opendir("/flash/frm/")  returns (DIR *) 0x0

	  From POSIX specs for opendir(): "A pathname ... that ends with one or
	  more trailing slashes shall be resolved as if a single dot character
	  ( '.' ) were appended to the pathname."

	  So for mount points, opendir() works correctly, but for FAT32 filesystem
	  it fails to open directory if the path has a trailing slash...

	  NOTE: You would not see this problem if you call opendir() indirectly in
	  NSH (like 'ls -R /') because NSH contains logic to remove trailing '/'
	  characters from paths.  From Gregory Nutt (2018-11-16).
	* arch/arm/src/max36xx:  Brings in WIP port for the Maxim Integrated
	  MAX326xx MCU family.  Not really very much in place yet so marked
	  EXPERIMENTAL in Kconfig file.  From Gregory Nutt (2018-11-16).
	* configs/stm32f429i-disco/lvgl/defconfig:  Fix lvgl demo removing
	  STM32_FB_CMAP.  From Alan Carvalho de Assis (2018-11-17).
	* arch/arm/src/stm32/stm32_pwm.c:  STM32 MOE is not being appropriately
	  handled for PWM for advanced timers.  It is only ever reset and so no PWM
	  train is generated.  This change addresses this.  Noted by Dave Marples.
	  From Mateusz Szafoni (2018-11-17).
	* arch/arm/stm32: stm32_flash_writeprotect supported the same for
	  STM32F20XX as STM32F4XXX  From Anthony Merlino (2018-11-17).
	* configs/max32660-evysy/:  Add support for the Maxim Integrated
	  MAX32660-EVSYS board.  From Gregory Nutt (2018-11-17).
	* Improve LED handling #if~#endif in nrf52_autoleds.c and nrf52_userleds.c
	  - Add Adafruit Feather nRF52 board LED support
	  - Add Adafruit Feather nRF52 board
	  - Add nrf52-generic
	  - Replace 'pca10040' with 'generic'
	  - Copy from nrf52-pca10040 to nrf52-generic
	  From Zou Hanya (2018-11-18).
	* arch/arm/src/tiva:  After commit
	  51b78034ac8d1fdf598107bf4093f0beccd5b80b, my tiva console does not work -
	  enter key produces garbage characters.  This commit fixes the problem for
	  me.  From Lwazi Dube (2018-11-18).
	* tools/nxstyle.c:  Add logic to detect long lines.  From Gregory Nutt
	  (2018-11-19).
	* arch/arm/src/stm32f7: Ported the QEncoder from F4 to F7  From Eduard
	  Niesner (2018-11-19).
	* tools/nxstyle.c:  Add -h for help.  From Gregory Nutt (2018-11-19).
	* arch/arm/src/imxrt:  Add ADC chip header  From David Sidrane (2018-11-20).
	* configs/imxrt1050-evk:  GPIO device driver support added and tested by
	  Pavlina Koleva and Ivan Ucherdzhiev  From Pavlina Koleva (2018-11-20).
	* arch/arm/src/armv7-m/arch_invalidate_dcache.c,
	  drivers/mmcsd/mmcsd_sdio.c, and other files in arch/:  This commit adds a
	  new function arch_invalidate_dcache_by_addr(). It takes the same
	  parameters as arch_invalidate_dcache(), but performs invalidation of only
	  the lines in cache that need to be invalidated.  This new function could
	  be used as a a direct replacement for arch_invalidate_dcache().

	  The user of this invalidation are mmcsd_sdio currently.  The mmcsd_sdio
	  driver makes calls for dcache invalidation through the chip specific
	  architecture function SDIO_DMARECVSETUP(). I changed the arch/arm/stm32f7
	  chips to use arch_invalidate_dcache_by_addr() instead of
	  arch_invalidate_dcache().

	  This commit includes additional changes to mmcsd_sdio.c.  I created
	  SDIO_DMADELYDINVLDT() (DMA delayed invalidate) to invalidate store-into
	  mode dcaches after the DMA transfer.  I have been using
	  SDIO_DMADELYDINVLDT() for several weeks now and it has fixed the problems
	  that I previously reported regarding non-cache aligned buffer
	  invalidation errors (for my store-through dcache). However, it does not
	  permit use of unaligned DMA buffers for store-into mode dcaches.

	  SDIO_DMADELYDINVLDT() is a NoOp unless the chip specific Kconfig file
	  selects CONFIG_ARCH_HAVE_SDIO_DELAYED_INVLDT. I have modified all the
	  stm32f7 chips to select it.  From Bob Feretich (2018-11-20).
	* All network drivers!  Change pre-processor logic that selects the high
	  priority work queue or gives preferential treatment to the high priority
	  work.  All network logic must run on the low priority work queue!  Or
	  suffer the consequences.  From Gregory Nutt (2018-11-21).
	* configs/stm32vldiscovery/scripts/stm32vldiscovery.ld:  Fix SRAM and FLASH
	  size in the linker script.  There is STM32F100RB with 8KB RAM and 128KB
	  FLASH on the STM32VL Discovery kit. Invalid memory size could cause a
	  hard fault.  From Matous Pokorny (2018-11-21).
	* arch/mips/src/pic32m[x|z]/pic32m[x|z]-ethernet.c:  Fix a comparison in a
	  debug assertion.  Should be <= vs <.  Noted by Anonymous in Bitbucket
	  Isue 134.  From Gregory Nutt (2018-11-21).
	* sched/signal/sig_timedwait.c:  Remove unnecessary disable of
	  pre-emption.  From Gregory Nutt (2018-11-23).
	* libs/libc/netdb:  Support multiple IP addresses per hostname  From Juha
	  Niskanen (2018-11-23).
	* configs/stm32vldiscovery: Fix memory size configuration and
	  documentation.  There is STM32F100RB instead of STM32F100RC on the STM32
	  VL Discovery kit.  From Matous Pokorny (2018-11-23).
	* Improvements in STM32 ADC, minor changes in STM32 PWM, DMA, HRTIM and add
	  some highpri ADC examples:
	  - arch/arch/src/stm32/stm32_adc: fix RCC reset logic
	  - arch/arch/src/stm32/stm32_adc: move sample time change functions to
	    low-level ADC ops
	  - arch/arch/src/stm32/stm32_adc: configurable ADC DMA mode (one shot
	    mode, circular mode)
	  - arch/arch/src/stm32/stm32_pwm: remove llops_get interface. We can use
	    structure casting to get pwm low-level ops
	  - arch/arch/src/stm32/stm32_pwm: add timer enable/disable and frequency
	    update to low-level ops
	  - arch/src/arm/stm32: remove redundant stm32f33xxx_dma.c
	  - arch/arm/src/stm32/stm32f40xxx_dma.c: add interfaces to interact with
	    highp priority DMA interupts
	  - arch/src/arm/stm32/stm32_hrtim: do not enable timers on startup if
	    option from Kconfig selected and add interface to enable/disable timers
	  - configs/nucleo-f334r8/highpri: update configuration due to changes in
	    stm32_adc
	  - configs/stm32f334-disco/buckboost: update configuration due to changes in
	    stm32_adc
	  - configs/nucleo-f334r8/highpri: add support for ADC injected sequence,
	    add triggering from TIM1
	  - configs/nucleo-f302r8/highpri: add high priority ADC interrupts example
	  - configs/stm32f429i-disco/highpri: add high priority ADC interrupts
	    example
	  From Mateusz Szafoni (2018-11-23).
	* fs/procfs/fs_procfsproc:  Extended the process ID ProcFS output to show
	  per-thread maximum time for pre-emption disabled and maximum time within
	  a critical section.  From Gregory Nutt (2018-11-24).
	* sched/sched/sched_critmonitor.c:  Adds data collection logic in support
	  of monitoring critical sections and pre-emption state.  From Gregory Nutt
	  (2018-11-24).
	* configs/stm32f4discovery:  Add timing support for the critical section
	  monitor using the DWT CYCNT register.  From Gregory Nutt (2018-11-24).
	* fs/procfs/fs_procfscritmon.c and sched/sched/sched_critmonitor.c:  Add
	  support for global pre-emption and global critical sections to monitor as
	  suggested by Xiang Xaio.  From Gregory Nutt (2018-11-24).
	* Critical Section Monitor:  Add low level timer support for simulation.
	  From Gregory Nutt (2018-11-24).
	* arch/:  Update all _exit() implementations for all architectures so that
	  they correctly called the scheduler instrumentation layer for the new
	  task that runs when the old one exits.  This missing instrumentation was
	  confusing the Critical Section Monitor logic with uses this
	  instrumentation to track the state of critical sections.  From Gregory
	  Nutt (2018-11-24).
	* drivers/lcd:  Add support to Alphanumeric Sitronix ST7032i display  From
	  Alan Carvalho de Assis (2018-11-24).
	* configs/stm32f4discovery:  Add board support to display ST7032i  From
	  Alan Carvalho de Assis (2018-11-24).
	* wireless/bluetooth/bt_conn.c:  Fix uninitialized variable.  From Lwazi
	  Dube (2018-11-25).
	* sched/irq/Make.defs:  Fix warning about irq_csection.o appearing multiple
	  times in the same rule.  From Gregory Nutt (2018-11-25).
	* sched/irq and sched/sched:  Measurement of interrupt handler duration
	  used to be available only in Tickless mode since it used the high
	  resolution Tickless timer to measure interrupt time.  This commit adds
	  CONFIG_SCHED_IRQMONITOR_GETTIME which, if enabled, will force the
	  interrupt duration calculation to use the same high-resolution,
	  platform-specific timer as is used with the Critical Section Monitor.
	  This leads to two improvements:  (1) You can now measure interrupt
	  duration in non-Tickless mode, and (2) in either mode, the interrupt
	  duration and the critical section measures will use the same
	  high-resolution timer and should, therefore, never be any discrepancy due
	  to different clock sources.  From Gregory Nutt (2018-11-26).
	* wireless/bluetooth/bt_att.c:  Fix uninitialized variable.  From Lwazi
	  Dube (2018-11-27).
	* net/socket/net_clone.c:  On a failure to start the TCP monitor, the clone
	  socket is closed but is not properly freed, leaving it attached to a TCP
	  connection structure with the wrong reference count.  From Gregory Nutt
	  (2018-11-27).
	* arch/arm/src/max326xx:  Fixes for GPIO configuration problems and serial
	  driver problems.  I now get the NuttShell prompt (if I also band on ENTER
	  to force all of the characters out).  Progress, but not yet ready.  From
	  Gregory Nutt (2018-11-27).
	* arch/arm/src/max326xx and configs/max32660-evsys/src:  Fix some issues
	  with GPIO setup of output pins.  Correct polarity of on-board LED
	  output.  The on-board LED is now functional.  From Gregory Nutt
	  (2018-11-28).
	* arch/arm/src/max326xx: WFI instruction in IDLE loop seems to interfere
	  with stability.  Commented out for now.  Needs to be investigated
	  further.  From Gregory Nutt (2018-11-28).
	* arch/arm/src/max326xx:  Fixes UART interrupt problems.  With these
	  changes, the NSH configuration appears stable and is no longer
	  conditioned on EXPERIMENTAL.  From Gregory Nutt (2018-11-29).
	* fs/procfs:  Remove the unnecessary critical section  From Xiang Xiao
	  (2018-11-29).
	* sched/sched_foreach.c:  sched_foreach() should not have to hold the
	  critical section over the entire traversal.  It should be acceptable to
	  simply only the critical section while one entry is being processed (the
	  caller can always call sched_foreach within a critical section is greater
	  stability is needed).  From Gregory Nutt (2018-11-29).
	* wireless/bluetooth/bt_hcicore.c:  Add second RX work function  From Lwazi
	  Dube (2018-11-30).
	* include/nuttx/wireless/bluetooth/bt_gatt.h:  Fix struct name.  From Lwazi
	  Dube (2018-11-30).
	* sched/:  Add debug assertions before each call to up_block_task() to
	  assure that there is no attempt to block an IDLE task.  From Dave Marples
	  (2018-11-30).
	* arch/mips/src/mips32/Kconfig:  Allow Penguino for windows for the
	  Windows Ubuntu platform as well (2018-11-30).
	* arch/arm/src/max326xx/max32660/max32660_spim.c:  SPI0 master mode support
	  is complete (sans DMA and completely untested).  From Gregory
	  Nutt (2018-11-30).
	* configs/max32660-evsys/src:  Add framework for SPI support.  From Gregory
	  Nutt (2018-11-30).
	* configs/max32660-evsys:  Added support for an SPI-based micro-SD card.
	  Does not yet work (SPI hangs with no data transferred).  From Gregory
	  Nutt (2018-11-30).
	* drivers/lcd/Kconfig and several other places:  Rename CONFIG_LCD_CONSOLE
	  to CONFIG_SLCD_CONSOLE.   The original name CONFIG_LCD_CONSOLE is
	  incorrect because it runs on SLCD display. This patch fix it and update
	  its dependences  From Alan Carvalho de Assis (2018-11-30).
	* configs/stm32f4discovery:  If the Critical Section Monitor, modify the
	  ITM_LAR register to assure that the DWT cycle counter is enabled.
	  Suggested by Dave Marples.  From Gregory Nutt (2018-11-30).
	* arch/arm/src/armv7-m/itm.h:  Fix missing space causing macro issues  From
	  Alan Carvalho de Assis (2018-12-01).
	* configs:  Add support for nucleo-f103rb, nucleo-f207zg and nucleo-l152re
	  From Mateusz Szafoni (2018-12-01).
	* tools/convert-comments.c:  Add a tool to convert C++-style comments to
	  C89 C-style comments.  From Gregory Nutt (2018-12-01).
	* configs/nucleo-f207zg, configs/nucleo-f103rb:  Add ADC and PWM examples;
	  arch/arm/src/stm32_adc.c:  There is no DMA CFG bit for the basic IPv1
	  ADC.  From Mateusz Szafoni (2018-12-02).
	* Use STM32 DMA IP core version instead of chip family names and some minor
	  improvements:
	  - arch/arm/src/stm32/chip/stm32_adc.h: raise error if two IP cores selected
	  - arch/arm/src/stm32/Kconfig: hide TIMER menu, HRTIM menu and USB Host
	    debug menu if peripherals not enabled
	  - configs/stm32f429i-disco/highpri/defconfig: fix configuration warning
	  From Mateusz Szafoni (2018-12-02).
	* drivers/spi/Kconfig and include/nuttx/spi/spi.h:  Extend the HW features
	  supported by SPI.  It now supports a deferred DMA trigger hardware
	  configuration.  arch/arm/src/stm32/stm32_spi.c:  Implements the new
	  deferred DMA trigger feature.  From Dave Marples (2018-12-02).
	* include/nuttx/wireless/bluetooth and include/nuttx/wireless/bluetooth:
	  Add SIOCBTCONNECT and SIOCBTDISCONNECT ioctl commands  From Lwazi Dube
	  (2018-12-02).
	* arch/arm/src/stm32/stm32_adc.c:  Refactor adc_reset. It should be easier
	  to maintain this code if it's divided into smaller functions  From
	  Mateusz Szafoni (2018-12-02).
	* arch/arm/include/tiva:  Started integration of support for the CC13x0,
	  CC13x2, and CC26x2.  From Gregory Nutt (2018-12-03).
	* tools/detab.c:  Add detab.c which will convert all tabs in a file to
	  spaces.  From Gregory Nutt (2018-12-03).
	* tools/lowhex.c:  Add lowhex.c that will convert hexadecimal constants in
	  a file to use lower case representation.  From Gregory Nutt (2018-12-03).
	* STM32F7, STM32H7, and STM32L4:  Port Dave Marples STM32 fix to other
	  STM32 SPI drivers  From Gregory Nutt (2018-12-03).
	* configs/launchxl-cc1312r1/:  Add a configuration for the
	  LAUNCHXL-CC1312R1 board.  This is a very stripped down configuration.  It
	  was needed to support verification of the CC13xx configuration logic and
	  will be needed to support completion of the CC13xx port.  From Gregory
	  Nutt (2018-12-03).
	* arch/:  In the current implementation we only use very high priority
	  interrupts (levels 0, 0x10 and 0x20 in CORTEX-M speak) but that means
	  there are loads of lower priority ones that are effectively unused. I
	  have *not* changed the semantics of these levels but have 'shifted' them
	  to be based around the midpoint of the available interrupts (0x80) rather
	  than at the top end....that allows for interrupts to be defined above
	  (or, indeed, below) them as needed by the application.  This should have
	  no functional effect on existing code but adds in a clean capability to
	  define higher priority interrupts.  From Dave Marples (2018-12-03).
	* arch/arm/src/stm32f0/stm32f0_clockconfig.c:  Fixes the problem in GPIO
	  port clocks. Only port A clock was enabled although the comment states
	  otherwise.  From Juha Paalijärvi (2018-12-04).
	* arch/arm/src/tiva:  Remove option CONFIG_TIVA_BOARD_CLOCKCONFIG.  It is
	  not used and unnecessary.  Fix some naming.  up_clockconfig() is
	  inappropriate.  Change tiva_clockconfig() to tiva_clock_reconfigure()
	  then we can change up_clockconfig() to tive_clock_configure().  From
	  Gregory Nutt (2018-12-04).
	* arch/arm/include/stm32/chip.h:  Remove redundant STM32 family
	  definitions. It is already done in arch/arm/src/stm32/Kconfig  From
	  Mateusz Szafoni (2018-12-05).
	* stm32f7:  I2C out of bounds access on priv->msgv.  Error in if statement.
	  It was checking for msgc > 0.  If message count is 1, only index 0 is
	  valid on priv->msgv.  Therefore random values in memory were used to set
	  next_norestart.  From David Sidrane (2018-12-05).
	* STM32H7 and STM32L4:  Applied David Sidrane's I2C to
	  arch/arm/src/stm32h7/stm32_i2c.c and arch/arm/src/stm32l4/stm32l4_i2c.c.
	  Those easy because F7 patch applied with no problem (after changing path
	  and file names appropriately).  The patch could not be applied to the
	  following.  The logic is different.  I don't know if a similar change is
	  needed there or not.
	  - arch/arm/src/stm32/stm32f30xxx_i2c.c
	  - arch/arm/src/stm32/stm32f40xxx_i2c.c
	  - arch/arm/src/stm32/stm32_i2c.c
	  - arch/arm/src/stm32/stm32_i2c_alt.c
	  - arch/arm/src/stm32f0/stm32f0_i2c.c
	  From Gregory Nutt (2018-12-05).
	* arch/arm/src/armv7-m:  This commit changes the lazy and non-lazy
	  exception handler to remove a couple of cpsid instructions from them on
	  ARMv7-m.  If my understanding is correct then these interrupt
	  manipulations aren't doing anything anyway because prioritization stops
	  secondary interrupts arriving and, even if they did work, they would have
	  introduced race conditions for the period of time between the interrupt
	  arriving and further interrupts being disabled.  From Dave Marples
	  (2018-12-06).
	* arch/arm/src:  Remove all driver-specific logic to set the interrupt
	  priority.  There is no good reason to change the interrupt priority
	  unless you just want to debug a difficult problem.  OR if you want to use
	  high priority interrupts.  In that case the specific interrupt priorities
	  will need to be set by board-specific logic.  From Gregory Nutt
	  (2018-12-06).
	* fs/cromfs/fs_cromfs.c:  Fixes hardfault  From David Sidrane (2018-12-06).
	* libs/libc/stdio/lib_libfread.c:  fread() should always set EOF if fewer
	  than the requested number of bytes was not read.  Per Anthony Merlino.
	  From Gregory Nutt (2018-12-07).
	* arch/mips/include/pic32mz/chip.h:  Add a missing " in an error message.
	  From Ouss4 (2018-12-07).
	* arch/mips/src/pic32mz:  Add support for the I2C bus.  From Ouss4
	  (2018-12-07).
	* arch/arm/src:  In most I2C drivers, correct upper index value in I2C
	  trace dump. Eliminates the extra NONE event from the trace dump output.
	  From Ouss4 (2018-12-08).
	* wireless/bluetooth and include/nuttx/wireless/bluetooth:  Remove
	  unnecessary gatt ioctls  From Lwazi Dube (2018-12-08).
	* STM32F3 and STM32F4 I2C:  Remove the extra NONE event from the trace dump
	  output.  From Ouss4 (2018-12-08).
	* STM32 I2C (alternate):  Remove the extra NONE event from the trace dump
	  output.  From Ouss4 (2018-12-08).
	* Improvements in STM32 ADC:
	  - arch/arm/src/stm32/stm32_adc.c:  Start conversion on startup is now
	    possible if TIM triggering selected. This can be useful to start ADC
	    TIM conversion for ADC IPv2 when opening ADC device.
	  - arch/arm/src/stm32/stm32_adc.c:  Fix compilation errors for chips with
	    one ADV TIM
	  - configs/nucleo-f303re:  Refresh ADC example
	  - configs/nucleo-f334r8:  Refresh ADC example
	  From Mateusz Szafoni (2018-12-09).
	* configs/nucleo-f334r8:  Add example for the SPWM generation (custom STM32
	  PWM usage).  From Mateusz Szafoni (2018-12-09).
	 * arch/arm/src/stm32/stm32_pwm:  Fix compilation errors if the upper-half
	   PWM logic is not enabled. From Mateusz Szafoni (2018-12-09).
	* include/nuttx/drivers/pwm.h:  Remove dependency on CONFIG_PWM for the
	  upper-half PWM header.  This allows compilation for the lower-level PWM
	  drivers even if the upper-half PWM logic is not used.  From Mateusz
	  Szafoni (2018-12-09).
	* arch/arm/src/stm32/stm32_tim.c:  Fix compilation error if there is no
	  TIM8.  From Mateusz Szafoni (2018-12-09).
	* configs/nucleo-f334r8/highpri:  Remove the upper-half ADC from
	  configuration.  From Mateusz Szafoni (2018-12-09).
	* configs/nucleo-f302r8/highpri:  Remove the upper-half ADC from
	  configuration.  From Mateusz Szafoni (2018-12-09).
	* configs/stm32f429i-disco/highpri: remove the upper-half ADC from
	  configuration  From Mateusz Szafoni (2018-12-09).
	* include/nuttx/net/arp.h:  Fix whitespace after ARPHRD_IEEE80211  From
	  Daniel Agar (2018-12-09).
	* fs/vfs:  dup() and dup2() were broken some time back.  fs_dupfd() was
	  return returning OK on success, not the file descriptor of the duplicated
	  fd.  From David Sidrane (2018-12-10).
	* drivers/wireless/bluetooth/bt_uart_cc2564.c:  Add cc2564 driver.  From
	  Lwazi Dube (2018-12-11).
	* drivers/1wire/ds28e17.c:  Optimize I2C write followed by read to same
	  address.  From Juha Niskanen (2018-12-11).
	* arch/arm/src/stm32/Kconfig:  Simplify ARM core selection logic  From
	  Mateusz Szafoni (2018-12-12).
	* drivers/mtd/at25.c:  Added support for AT25DF081A serial flash chip.
	  From Marc Rosen (2018-12-12).
	* fs/nxffs/nxffs_ioctl.c:  Pass unrecognized IOCTL commands to the
	  contained MTD driver.  From Daniel P. Carvalho (2018-12-12).
	* arch/arm/src/stm32/Kconfig:  USB Host is an option.  From David Sidrane
	  (2018-12-12).
	* drivers/mtd/at25.c:  Fixed missing opening parenthesis.  From Marc Rosen
	  (2018-12-13).
	* gencromfs.c:1171:3: warning: ignoring return value of 'asprintf',
	  declared with attribute warn_unused_result [-Wunused-result].  From David
	  Sidrane (2018-12-13).
	* arch/arm/src/tiva/common/tiva_hciuart.c:  Port bluetooth HCI uart
	  interface from stm32 to tiva  From Lwazi Dube (2018-12-15).
	* arch/arm/src/stm32f0l0:  Rename stm32f0 to stm32f0l0 to make a space
	  for STM32 L0.  Rename files, functions and defines, removing the f0_
	  from the names in order to make them MCU agnostic.  From Gregory Nutt
	  (2018-12-16).
	* Numerous files:  Fixes usage of CONFIG_BIG_ENDIAN; should be
	  CONFIG_ENDIAN_BIG  From Anthony Merlino (2018-12-16).
	* net/sixlowpan:  Fixes decompression of ipaddr from MAC address. The
	  logic used to populate the IP from the radio address should match
	  sixlowpan_ipfromsaddr/sixlowpan_ipfromeaddr  From Anthony Merlino
	  (2018-12-16).
	* Fix lc823450 related:
	  - configs/lc823450-xgevk: Fix IOB params in rndis/defconfig.  These
	    prameters work for HTTP audio streaming.
	  - arch/arm/src/lc823450: Fix up_allocate_heap() in
	    lc823450_allocateheap2.c.  This change fixes heap size and also
	    implements up_addregion().  From Masayuki Ishikawa (2018-12-18).
	* sixlowpan: Fixes logic surrounding the Universal/Local bit. This bit
	  represents whether the IID is locally/globally administered. The U/L
	  bit is bit 1 of the MSB of the EUI-64. It should only be inverted in
	  cases where there is a full EUI-64. In cases where the IID is derived
	  from say, a short address, this bit should be forced to 0, indicating
	  that it is locally administered.   See:
	  - https://tools.ietf.org/html/rfc4291#section-2.5.1
	  - https://tools.ietf.org/html/rfc4944#section-6
	  - https://tools.ietf.org/html/rfc2464#section-4
	  From Anthony Merlino (2018-12-18).
	* sched/task/task_spawn.c:  Correct description of input parameters to
	  task_spawn_exec().  Noted by: JeongchanKim  From Gregory Nutt
	  (2018-12-18).
	* sixlowpan/ieee802154: IEEE802.15.4 stores and uses addresses in little
	  endian order.  From Anthony Merlino (2018-12-18).
	* crypto/aes.c:  This commit provides an improved AES cipher API in
	  addition to the existing routines.  The reasons for this new API are:
	  1) better performance, giving the possibility to avoid re-setting-up
	  the key for each AES block when the same key is used multiple times.
	  This is important for the current single user of AES, which is related
	  to storage and FTL.  And 2) suitable for simultaneous use of multiple
	  AES keys, which will be required by the upcoming crypto framework.  It
	  retains compatibility with the previous API, so there is no need to
	  change anything else right now.  From Sebastien Lorquet (2018-12-18).
	* arch/ assertions:  Correct duplicated logic from commit
	  dbf01d12b7321d1b48b68d3b69842a853b049376.  Checking for PID == zero is
	  not a valid way to test for the IDLE task in all configurations!  This
	  is only true in the single CPU configuration.  In multiple CPU
	  configurations, there will be a separate IDLE task for each CPU with a
	  different PID and an alternative check must be used.  NOTE:  The logic
	  fixed in somes places still lacks sufficient intelligence to find the
	  right stack for the CPU IDLE thread and could still show the wrong
	  stack.  From Gregory Nutt (2018-12-18).
	* Change rndis mac:
	  - configs/lc823450-xgevk:  Change RNDIS MAC address assignment.  In
	    previous implementation, mac[0] was assigned to 0xaa for RNDIS host
	    to avoid MAC address conflicts with RNDIS device..  However, I
	    noticed that this assignment causes a random MAC address generation
	    on ubuntu16.04 or later which is inconvenient to set up network
	    interface.  This new assignment scheme fixes this issue.
	  - configs/viewtool-stm32f107: Change RNDIS MAC address assignment.
	    Same issue.
	  From Masayuki Ishikawa (2018-12-19).
	* crtypo/:  This change:
	  - Avoids the use of up_aesinitialize() entirely, which resolves
	    dependency problems, because this function does not make sure that an
	    actual hardware aes implementation was made available: each SoC is
	    now responsible to ensure the AES hardware is initialized before
	    first use. This applies to lpc43xx, stm32 and sam34.
	  - Remove definitions of the NEVER used aes_init and aes_update
	    operations. The new AES API will be more suitable.
	  - Change the unusual naming in stm32 (avoiding possible naming clashes)
	  - Change the unusual naming in sam34 (avoiding possible naming clashes)
	  - Add some FAR to pointers and enforce the 80 col limit in stm32 and sam
	  From Sebastien Lorquet (2018-12-19).
	* arch/arm/src/stm32:  Add support for DMA v1 CSELR support.  From
	  Mateusz Szafoni (2018-12-19).
	* Brings in initial WIP support for the STML0.  This initial commit is
	  unverified and, hence it it marked "EXPERIMENTAL."  From Mateusz
	  Szafoni (2018-12-19).
	* configs/:  Hook new STM32L0 boards into the configuration system.
	  nucleo boards use as default ST LINK MCO as clock input from MCU and
	  for this HSEBYP must be enabled
	  - configs/nucleo-l073rz:  Add basic support for nucleo-l073rz
	  - configs/b-l072z-lrwan1:  Add basic support for b-l072z-lrwan1.
	  From Mateusz Szafoni (2018-12-19).
	* sixlowpan:  Address comment regarding avoiding double lookup of address
	  context.  From Anthony Merlino (2018-12-19).
	* Revert "This patch prevent heap corruption as in below case."  This
	  solution to the problem noted by EunBong Song results in major memory
	  fragmentation and and out-of-memory conditions on the PX4 platform.  On
	  that platform the lower priority work queue is very low priority and
	  essentially never runs when the system is busy.  As a result, the
	  systems gets slowly starved of memory until failures and bad behaviors
	  begin to occur.  This reverts commit
	  91aa26774b291fa553f701ce5222e56a6156c323.  From Gregory Nutt
	  (2018-12-20).
	* mm/mm_heap/mm_sem.c:  This is a candidate replacement for the reverted
	  change 91aa26774b291fa553f701ce5222e56a6156c323.  This change adds a
	  check to mm_trysemaphore() (the root implementation of both
	  kmm_trysemaphore() and umm_trysemaphore()).  It checks if the that task
	  that is apparently executing is marked as RUNNING.  If not, how could
	  the non-running task be trying to get the MM semaphore?  I think only
	  in the exact scenario that Eunbong Song has described.  So I think the
	  solution should provide the same protection as
	  91aa26774b291fa553f701ce5222e56a6156c323 but without the horrific
	  consequences to memory usage.  From Gregory Nutt (2018-12-20).
	* sched/Kconfig and sched/init/os_bringup.c:  Allow the init task
	  priority to be set.  From David Sidrane (2018-12-20).
	* arch/arm/src/stm32/chip/stm32_dma_v1.h:  Add missing DMA channel
	  configuration.
	* mm/mm_heap/mm_sem.c:  Defer freeing if mm is held by a not running
	  task.  When the holder is running we can add a holder count. If there
	  is no holder OR it is not running we want to try to take the semaphore.
	  There will not be a count if the task is the holder and not running
	  because it already holds the count.  This will result it the deferred
	  free.   We will take it when not held and do the free when we can get
	  the count because there was no holder.  From David Sidrane (2018-12-20).
	* Extends the MTD configdata device with the following features /
	  additions:
	  1. Configurable option to use named config items instead of enumerated
	    ID/Instance numbers.
	  2. Ability to iterate through the existing configdata items in the
	    /dev/config device.
	  3. Ability to "unset" a configdata item.
	  4. Ability to perform "flash_eraseall" on the /dev/config device.
	  From Ken Pettit (2018-12-20).
	* drivers/analog/lmp92001.c:  Add support for the TI LMP92001 device.
	* arch/arm/src/samd2l2/sam_i2c_master.c:  Corrects behavior of the
	  I2C_M_NOSTART flag.  Also adds a release a bus on RXNACK and corrects
	  typo priv->flags to msg->flags as priv->flags is never set.  From
	  Alexander Vasiliev (2018-12-22).
	* arch/arm/src/samd5e5/sam_i2c_master.c:  Alexander Vasiliev's fix to the
	  SAMD21 I2C Master (commit b1110ba91c549572e94c24ebed202643233deee3)
	  should probably also be applied to the SAMD51 I2C Master which is
	  identical.  From Gregory Nutt (2018-12-22).
	* Fix lc823450 start:
	  - arch/arm/src/lc823450: Use CONFIG_STACK_COLORATION instead of
	    CONFIG_DEBUG_STACK
	  - arch/arm/src/lc823450: Fix go_os_start() in lc823450_start.c.   I
	    found a bug in go_os_start() that it returns immediately because it
	    does not compare r1 to zero. This commit fixes this bug. Also, this
	    commit fixes its description.
	  From Masayuki Ishikawa (2018-12-25).
	* arch/arm/src:  Masayuki Ishikawa's change to go_os_start() should be
	  applied to all MCU-specific start-up functions that support
	  go_os_start().  From Gregory Nutt (2018-12-25).
	* configs/stm32f4discovery:   Add loadable app build support in
	  Make.defs  From Masayuki Ishikawa (2018-12-25).
	* arch/arm/src/samd2l2/chip:  Adds a complete ADC header file for SAMD21
	  and a partially complete ADC header file for the SAML21.  From
	  Alexander Vasiliev (2018-12-26).
	* net/sixlowpan:  Record and restore d_buf on entry/exit of
	  sixlowpan_input. This avoids an issue where d_buf gets set to NULL by
	  sixlowpan, and then is used by forwarding logic from another network
	  interface before getting set back to the drivers internal b  From
	  Anthony Merlino (2018-12-26).
	* tools/gencromfs.c:  Fix build on macOS  From David Sidrane (2018-12-26).
	* sched/pthread:  Implement pthread_key_delete().  This involves some
	  minor changes to the group data structure.  From Gregory Nutt
	  (2018-12-28).
	* arch/arm/src/imxrt/chip/imxrt106x_pinmux.h:  Add FLEXCAN3 to pinmux.
	  From David Sidrane (2018-12-28).
	* arch/arm/src/tiva/:  Add support for LM3S9B92.  From Lwazi Dube
	  (2018-12-28).
	* Add some conditional compilation to logic added with commit
	  1cf992ed04c230e639bf29e55f2ec110cb9c4340 to better 'idiot-proof' the
	  LM3S support.  From Gregory Nutt (2018-12-28).
	* arch/arm/src/samd2l2, configs/samd20-xplained, samd21-xplained,
	  saml21-xplained:  Fix SAMD2L2 arch to use calibrated oscillator value.
	  Now SAMD20 and SAMD21 should work fine without external crystal.  Note
	  that SAML21 Xplained board has an external crystal and doesn't need
	  this change, unless you don't want to use the crystal.  From Alexander
	  Vasiliev (2018-12-29).
	* drivers/mtd/smart.c:  Fix smart_write_alloc_sector sector size
	  calculation.  From Daniel P. Carvalho (2018-12-29).
	* mm/mm_heap/mm_sem.c and sched/task/task_getpid.c:  Commits
	  43d37c866bdaefeff659dec20ed380389c4880d5 and
	  f37202cbc0f72526ecfa58e5d27c5b4973289140 resolved some problems with
	  the original fix of 91aa26774b291fa553f701ce5222e56a6156c323.  However,
	  Those changes used an internal OS interface (sched_self()) which is not
	  available when the the user-space memory manager is built in the
	  PROTECTED or KERNEL builds and resulted in build failures.  This commit
	  repartitions the logic by moving some of the changes from mm_sem.c into
	  task_getpid.c.  The logic is equivalent for the case of
	  mm_trysemaphore(), but now has wider impact (since it potentially
	  affects all callers of getpid()).  Hence, this change may also
	  introduce some other issues that will need to be addressed.  From
	  Gregory Nutt (2018-12-30).
	* arch/arm/src/samd2l2/sam_i2c_master.h:  Export
	  sam_i2c_master_initialize(int bus) to be used by board config.  From
	  Alan Carvalho de Assis (2018-12-30).
	* drivers/eeprom/i2c_xx24xx.c and include/nuttx/eeprom/i2c_xx24xx.h:  Add
	  support to Microchip AT24CM02  From Alan Carvalho de Assis (2018-12-30).
	* configs/saml21-xplained/include/board.h:  Fix removed MAXCOARSESTEP
	  from saml21-xplained board  From Alan Carvalho de Assis (2018-12-30).
	* arch/arm/src/tiva/common/lmxx_tm4c_gpioirq.c:  Fix tiva gpio
	  interrupts  From Lwazi Dube (2018-12-30).
	* configs/:  Commit fd68d74264c breaks all STM32 board configurations
	  that use STM32 USB host.  That is because that commit requires
	  CONFIG_STM_USBHOST to be set to build in USB host support, but did not
	  update the necessary board defconfig files to add that required
	  configuration.  From Gregory Nutt (2018-12-30).
	* drivers/net/tun.c:  Fixes a problem reported by Masayuki Ishikwawa:
	  Recently I noticed that ARP response packet is corrupted when I tried
	  to run bluekitchen with the latest tun.c in TAP mode.  If I revert
	  commit 8193c28e9126c9cb89042e80d6ebab7485a831e4, then it works again.
	  From Xiang Xiao (2018-12-30).
	* arch/arm/include/tiva and src/tiva:  Improve GPIO interrupt support by
	  removing unnecessary, hard-coded per-MCU defines and using the existing
	  Kconfig configuration options instead.  From Lwazi Dube (2018-12-31).
	* drivers/power/mcp73871.c:  Add support to Microchip MPC73871 Battery
	  Charger.  From Alan Carvalho de Assis (2018-12-31).
	* configs/tm4c1294-launchpad/src:  Add IRQBUTTONS support to tm4c1294
	  launchpad.  From Lwazi Dube (2018-12-31).
	* arch/arm/src/stm32:  Unified naming for DAC interfaces  From Mateusz
	  Szafoni (2019-01-02).
	* drivers/usbdev/cdcacm.c:  When implemented usb cdc on nrf52840,
	  I found some issues with  cdc driver:
	  1. Lost data when receiving buffer is full;
	  2. Low-water mask implement issue;
	  3. Re-flush cdc buffer when enabling
	  4. Serial dma is conflict with cdc , modify the serial.h
	  From Levin Li (2019-01-02).
	* drivers/mtd/mtd_config.c:  Check return value mtdconfig_readbytes().
	  From Jussi Kivilinna (2019-01-02).
	* configs/pizero:  Remove the partial support for the Raspberry Pi Zero.
	  This port was started with the best of intentions but was never
	  completed.  The board support can still be found in the Obsoleted
	  repository.  From Gregory Nutt (2019-01-02).
	* arch/arm/src/bcm2708 and  arch/arm/include/bcm2708:  Remove all support
	  for the BCM2708/2835.  This was added only for support of the Pi Zero
	  board which was previously removed.  The support was minimal and
	  unverified.  The removed files can still be found in the Obsoleted
	  directory.  From Gregory Nutt (2019-01-02).
	* arch/arm/src/stm32f7:  stm32f7 enable separate DMA per SPI
	  configuration  From Daniel Agar (2019-01-02).
	* lc823450 spif boot:
	  - arch/arm/src/lc823450: Add support for SPI flash boot.  Also, remove
	    unnecessary code for the SPI flash boot.
	  - configs/lc823450-xgevk:   Add linker script for SPI flash boot
	  From Masayuki Ishikawa (2019-01-04).
	* drivers/power/battery_gauge.c:  Add missing initialization of
	  semaphore.  From Alan Carvalho de Assis (2019-01-04).
	* drivers/power/battery_charger.c:  Add missing initialization of
	  semaphore.  From Alan Carvalho de Assis (2019-01-04).
	* tools/mkconfig.c:  Add definitions to distinguish between tristate 'y'
	  and 'm' options.  From Gregory Nutt (2019-01-05).
	* drivers/power/mcp73871.c:  Fix MCP73871 driver to register correctly as
	  a battery charger.  The first element of a 'struct
	  battery_charger_dev_s' should be a pointer to operations structure.
	  From Alan Carvalho de Assis (2019-01-05).
	* drivers/net/telnet.c:  Add NAWS and poll interface to telnet for screen
	  size negotation used with termcurses.  From Ken Pettit (2019-01-05).
	* arch/arm/src/samv7/sam_serial.c:  Fix case where TTYS0 is not defined.
	  From Ken Pettit (2019-01-05).
	* arch/arm/src/armv7-a/arm_mmu.c:  Fix end address calculation for
	  mmu_invalidate_region() API  From Petro Karashchenko (2019-01-06).
	* arch/arm/src/armv7-a/mmu.h:  Use TLBIMVA vs TLBIMVAAIS to invalidate
	  the Cortex-A8 cache.  From Petro Karashchenko (2019-01-06).
	* Initial changes for BeagleBone Black board support (TI AM335x family
	  based on Cortex-A8):
	  - configs/beaglebone-black:  Adds initial support for the BeagleBone
	    Black board.
	  - arch/arm/src/am335x:  Adds initial support for the TI AM355x family.
	  From Petro Karashchenko (2019-01-06).
	* drivers/telnet/telnet.c:  telnet.c priv only used if
	  CONFIG_TELNET_SUPPORT_NAWS  From Daniel Agar (2019-01-06).
	* arch/arm/src/am335x/chip/am3358_memorymap.h:  Code cleanup for
	  beaglebone black port.  From Petro Karashchenko (2019-01-06).
	* arch/arm/src/am335x/am335x_irq.c: Uncomment code for interrupt
	  enable/disable.  From Petro Karashchenko (2019-01-06).
	* drivers/timers/mcp7941x.c:  Add support for the MCP741x external RTC.
	  From Ouss4 (2019-01-06).
	* configs/lc823450-xgevk: Enable NFS client for rndis.  Also, some stack
	  size were adjusted to work with NFS  From Masayuki Ishikawa (2019-01-07).
	* include/dsp.h:  Fix missing semicolon error in dsp.h  From MYAPICI
	  (2019-01-07).
	* fix stm32 tim bug.  From lihaichen (2019-01-07).
	* drivers telnet common_ioctl() - inode only used with
	  CONFIG_TELNET_SUPPORT_NAWS  From Daniel Agar (2019-01-07).
	* mm/mm_heap/mm_calloc.c:  Verify that the number of elements times the
	  size of an element will not overflow type size_t.  This is required by
	  the SEI CERT C coding style and resolves anonymous Bitbucket Issue
	  #139  From Gregory Nutt (2019-01-07).
	* Revert "arch/arm/armv7-m:  MPU: mpu_log2regionceil needs take into
	  account the offset too".  Masayuki Ishikawa reports that this commit
	  breaks ALL PROTECTED mode builds.  It violates the basic requirements
	  of the use of the MPU in protected mode.  Those basic requirements are:
	  1. The MPU region must be aligned to the base address of the memory
	    region being mapped (it may NEVER extend before the memory region).
	    That is, the following MUST always be zero:
	    (base & ((1 << l2size) - 1))
	  2. The MPU region must never extend beyond the end of the memory
	     region.  That is, the following must be true:  size >= (1 << l2size)
	  This reverts commit 8b63d0230936bd7d6bd94f4c76b9402946f69b21.  From
	  Gregory Nutt (2019-01-08).
	* drivers/net/telnet.c:  Add missing logic to set read event flags in
	  poll() method.  From Ken Pettit (2019-01-08).
	* drivers/timers/mcp794xx.c:  Rename the module to mcp794xx.  From Ouss4
	  (2019-01-08).
	* Revert "arch/:  The protoype of mpu_log2regionfloor() changed; an
	  additional parameter was added.  However, none of the calls to
	  mpu_log2regionfloor() were updated to pass the new, additional
	  parameter."  Commit 8b63d0230936bd7d6bd94f4c76b9402946f69b21 was
	  reverted.  This related commit must now also be reverted to avoid
	  compilation errors.  This reverts commit
	  e8270defc9b26f7a7199288fa9ba203a96ed63d4.  From Gregory Nutt
	  (2019-01-08).
	* drivers/mtd/s25fl1.c:  Minor change for the s25fl1 QSPI FLASH driver
	  which fixes additional sectorshift vs. pageshift confusion.  From Ken
	  Pettit (2019-01-09).
	* STM32F7 and L4 I2cC:  Use clock_t for ticks instead of uint32_t to hold
	  system time.  From Jussi Kivilinna (2019-01-09).
	* Drivers for Sensirion SCD30, SGP30 and SPS30 sensors:
	  - drivers/sensors: add driver for Sensirion SCD30 CO2 sensor
	  - drivers/sensors: add driver for Sensirion SGP30 gas sensor
	  - drivers/sensors: add driver for Sensirion SPS30 particulate matter
	    sensor
	  From Jussi Kivilinna (2019-01-09).
	* Adds the ARM mbed littlefs to NuttX:
	  - depends on !DISABLE_MOUNTPOINT && MTD_BYTE_WRITE
	  - register_mtddriver("/dev/w25", mtd, 0755, NULL);
	    mount("/dev/w25", "/w25", "littlefs", 0, NULL);
	  From lihaichen (2019-01-09).
	* arch/arm/src/stm32f0l0:  Add support for GPIO EXTI.  From Mateusz
	  Sfafoni (2019-01-09).
	* configs/nucleo-l073rz:  Support for nrf24l01.  From Mateusz Sfafoni
	  (2019-01-09).
	* configs/b-l072z-lrwan1/include/board.h:  Add note about onboard Murata
	  CMWX1ZZABZ-09 module and definitions for available peripherals.  From
	  Mateusz Sfafoni (2019-01-09).
	* include/nuttx/compiler.h:  Correct support of C-version-specific
	  features.  Cannot depend on GCC version because -std=c89 may be used on
	  command line.  Need instead to use __STDC_VERSION__ to determine if a
	  feature is supported.  Also add conditional support inline, depending
	  on C99.  From Gregory Nutt (2019-01-09).
	* With these changes, I am able to access NSH on Beaglebone Black.  I
	  still observe data abort crash if I compile the code with optimization
	  enabled.  The next steps are to investigate the optimization issue and
	  add Watchdog module. Currently, NSH does not run for a long time.
	  - arch/arm/src/am335x/am335x_irq.c:  Correct interrupt processing routine
	  - configs/beaglebone-black/nsh/defconfig:  Enable debug compilation
	    options. Otherwise data abort crash is observed
	  - arch/arm/src/am335x/am335x_timerisr.c:  Make sure that Timer 1
	    interrupts are disabled before any access to peripheral registers
	  From Petro Karashchenko (2019-01-09).
	* drivers/mtd/smart.c:  Fix for the SmartFS MTD layer size mapping
	  issue.  With this patch, existing SmartFS drives should still mount and
	  work properly, plus the larger sector sizes are now supported
	  correctly.  From Ken Pettit (2019-01-10).
	* stm32f0l0:  Fix GPIO EXTI lines assignment for STM32 M0.  From Mateuz
	  Szafoni (2019-01-12).
	* drivers/timers/mcp794xx.c:  Fix MCP794xx driver to wait for OSCRUN and
	  fix tm_year.  From Abdelatif Guettouche (2019-01-12).
	* net/sixlowpan:  sixlowpan_input should always return 0 if the incoming
	  frame was consumed.  From Anthony Merlino (2019-01-13).
	* configs/lc823450-xgevk: Fix overlapped memory settings in memory.ld
	  From Masayuki Ishikawa (2019-01-14).
	* configs/stm32f4discovery: Update nsh configuration: (1) Add
	  CONFIG_BOARD_INITIALIZE=y, (2) Add CONFIG_EXAMPLES_HELLO=y  From
	  Masayuki Ishikawa (2019-01-14).
	* configs/stm32f4discovery: Update rndis configuration:
	  - Add NFS and adjusted stack size for usermain and telnetd client.
	  - Add support for loadable application and ping.
	  From Masayuki Ishikawa (2019-01-14).
	* drivers/lcd/st7032.c:  Fix seek method.  Was not taking into account
	  the offset for the SEEK_END case.  Did not account for negative
	  offsets.  On errors, it was clobbering the filep->f_pos setting.  From
	  Gregory Nutt (2019-01-14).
	* drivers/lcd/pcf8574_lcd_backpack.c:  Fix seek method.  Had the same
	  problems as noted for st7032.c driver.  From Gregory Nutt (2019-01-14).
	* arch/arm/src/am335x:  Add minimal wdog logic needed to disable the
	  watchdog timer.  Otherwise, the board is rebooted after certain time
	  expires while NuttX is running.  From Petro Karashchenko (2019-01-15).
	* drivers/lcd/tda19988:  This commit brings in a complete, but untested,
	  implementation of a driver for the TI TDA19988 HDMI Encoder.  This
	  encoder is used on the Beaglebone Black board.  Since this driver is
	  untested, it requires CONFIG_EXPERIMENTAL in the configuration.  From
	  Gregory Nutt (2019-01-15).
	* arch/arm/src/samd2l2/sam_i2c_master.c:  Adds calculation of a timeout
	  and disables interrupts in case of error.  From Alexander Vasiliev
	  (2019-01-15).
	* include/nuttx/lcd/edid.h:  Add EDID definitions  From Gregory Nutt
	  (2019-01-15).
	* nucleo-f767zi:  Use on board USB UART as default console.  Board is
	  powered by USB which can be used as UART link for upload and console.
	  Previously it was set to use Arduino shield which developer may not
	  have.  From Phil Coval (2019-01-15).
	* nucleo-144-f767-netnsh: Add ethernet config based on nsh configuration
	  plus  stm32f769i-disco/nsh-ethernet.  From Phil Coval (2019-01-15).
	* stm32: Align ethernet config name to netnsh.  nsh-ethernet was only
	  used for stm32f7*-disco, other configurations with network enabled are
	  commonly named netnsh or derived: (eg: nucleo-144/f7670-netnsh)  From
	  Phil Coval (2019-01-16).
	* arch/arm/src/am335x/am335x_timerisr.c:  Switch to DMTimer2 for system
	  tick generation. U-Boot does not enable DMTimer1ms clocks hence it is
	  not possible to use it until implementation in am335x_clockconfig.c is
	  ready  From Petro Karashchenko (2019-01-16).
	* arch/arm/src/imxrt/chip/imxrt_flexpwm.h:  Correct duplicated
	  definitions  From David Sidrane (2019-01-16).
	* arch/arm/src/imxrt/imxrt_serial.c:  Fix TTYS0 defined definitions of
	  higher numbered ports  From David Sidrane (2019-01-16).
	* arch/arm/src/imxrt/imxrt_serial.c:  Support independent input and
	  output flow control.  From David Sidrane (2019-01-16).
	* arch/arm/src/imxrt/imxrt_usdhc.c and related board.h files:  Use single
	  define for USB pin definitions.  From David Sidrane (2019-01-16).
	* arch/arm/src/imxrt:  ADD GPIO Support Input daisy selection  From David
	  Sidrane (2019-01-16).
	* arch/arm/src/imxrt/imxrt_lpspi.c:  Removed unused clock, that borked
	  the build  From David Sidrane (2019-01-16).
	* arch/arm/src/imxrt/Make.defs:  Include up_systemreset and
	  up_stackcheck.c  From David Sidrane (2019-01-16).
	* arch/arm/src/imxrt/imxrt_lpi2c.c:  I2C Reset rework  From David Sidrane
	  (2019-01-16).
	* arch/arm/src/imxrt/imxrt_periphclks.h:  Ensure C++ compatibility.  From
	  David Sidrane (2019-01-16).
	* arch/arm/src/tiva:  Support for the CC13x0 and CC13x2 families is
	  basically code complete except for integration with ROM DriverLib.
	  And, of course, completely untested.  Support for the CC26x2, which is
	  nearly identical to the CC13x2 is fragmentary.  From Gregory Nutt
	  (2019-01-17).
	* arch/arm/include/kinetis/kinetis_sim.h:  Remove extra characters following
	  #undef.  From Daniel Agar (2018-01-19).

7.29 2019-xx-xx Gregory Nutt <gnutt@nuttx.org>