Board-Specific Configurations
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

This directory contains the board support logic for all boards supported
by NuttX.

The nuttx/boards directory is a part of the internal OS. It should contain
only OS bring-up logic and driver initialization logic. THERE SHOULD BE NO
APPLICATION CALLABLE LOGIC IN THIS DIRECTORY.

If you have board-specific, application callable logic, that logic should not
go here. Please consider using a sub-directory under apps/platform instead.

Table of Contents
^^^^^^^^^^^^^^^^^

o Board-Specific Configurations
o Summary of Files
o Configuration Variables
o Supported Boards
o Configuring NuttX
o Building Symbol Tables

Board-Specific Configurations
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

The NuttX configuration consists of:

o Processor architecture specific files. These are the files contained
in the arch// directory.

o Chip/SoC specific files. Each processor architecture is embedded
in a chip or System-on-a-Chip (SoC) architecture. The full chip
architecture includes the processor architecture plus chip-specific
interrupt logic, general purpose I/O (GIO) logic, and specialized,
internal peripherals (such as UARTs, USB, etc.).

These chip-specific files are contained within chip-specific
sub-directories in the arch// directory and are selected
via the CONFIG_ARCH_name selection

o Board specific files. In order to be usable, the chip must be
contained in a board environment. The board configuration defines
additional properties of the board including such things as
peripheral LEDs, external peripherals (such as network, USB, etc.).

These board-specific configuration files can be found in the
boards//// sub-directories and are
discussed in this README. Additional configuration information may be
available in board-specific README files at
boards////README.txt files.

The boards/ subdirectory contains configuration data for each board. These
board-specific configurations plus the architecture-specific configurations in
the arch/ subdirectory completely define a customized port of NuttX.

Directory Structure
^^^^^^^^^^^^^^^^^^^

The boards/ directory contains board specific configuration logic. Each
board must provide a subdirectory under boards/ with the
following characteristics:



|-- README.txt
|-- include/
| `-- (board-specific header files)
|-- src/
| |-- Makefile
| `-- (board-specific source files)
|--
| |-- Make.defs
| `-- defconfig
|--
| |-- Make.defs
| `-- defconfig
...

Summary of Files
^^^^^^^^^^^^^^^^

README.txt -- This text file provides additional information unique to
each board configuration sub-directory.

include/ -- This directory contains board specific header files. This
directory will be linked as include/arch/board at configuration time and
can be included via '#include '. These header file
can only be included by files in arch/include/ and
arch//src

src/ -- This directory contains board specific drivers. This
directory will be linked as arch//src/board at configuration
time and will be integrated into the build system.

src/Makefile -- This makefile will be invoked to build the board specific
drivers. It must support the following targets: libext$(LIBEXT), clean,
and distclean.

A board may have various different configurations using these common source
files. Each board configuration is described by two files: Make.defs and
defconfig. Typically, each set of configuration files is retained in a
separate configuration sub-directory (, , .. in
the above diagram).

Make.defs -- This makefile fragment provides architecture and
tool-specific build options. It will be included by all other
makefiles in the build (once it is installed). This make fragment
should define:

Tools: CC, LD, AR, NM, OBJCOPY, OBJDUMP
Tool options: CFLAGS, LDFLAGS

When this makefile fragment runs, it will be passed TOPDIR which
is the path to the root directory of the build. This makefile
fragment should include:

$(TOPDIR)/.config : NuttX configuration
$(TOPDIR)/tools/Config.mk : Common definitions

Definitions in the Make.defs file probably depend on some of the
settings in the .config file. For example, the CFLAGS will most likely be
different if CONFIG_DEBUG_FEATURES=y.

The included tools/Config.mk file contains additional definitions that may
be overridden in the architecture-specific Make.defs file as necessary:

COMPILE, ASSEMBLE, ARCHIVE, CLEAN, and MKDEP macros

defconfig -- This is a configuration file similar to the Linux
configuration file. In contains variable/value pairs like:

CONFIG_VARIABLE=value

This configuration file will be used at build time:

(1) as a makefile fragment included in other makefiles, and
(2) to generate include/nuttx/config.h which is included by
most C files in the system.

Configuration Variables
^^^^^^^^^^^^^^^^^^^^^^^

At one time, this section provided a list of all NuttX configuration
variables. However, NuttX has since converted to use the kconfig-frontends
tools (See https://bitbucket.org/nuttx/tools/src/master/kconfig-frontends/.)
Now, the NuttX configuration is determined by a self-documenting set of
Kconfig files.

The current NuttX configuration variables are also documented in separate,
auto-generated configuration variable document. That configuration variable
document is generated using the kconfig2html tool that can be found in the
nuttx/tools directory. That tool analyzes the NuttX Kconfig files and
generates an excruciatingly boring HTML document.

The latest boring configuration variable documentation can be regenerated at
any time using that tool or, more appropriately, the wrapper script at
nuttx/tools/mkconfigvars.sh. That script will generate the file
nuttx/Documentation/NuttXConfigVariables.html.

Supported Boards
^^^^^^^^^^^^^^^^

boards/avr/atmega/amber
This is placeholder for the SoC Robotics Amber Web Server that is based
on the Atmel AVR ATMega128 MCU. There is not much there yet and what is
there is untested due to tool-related issues.

boards/arm/sam34/arduino-due
This sub-directory holds board support for the Arduino DUE board featuring
the Atmel ATSAM3X8E MCU running at 84 MHz.

boards/avr/at32uc3/avr32dev1
This is a port of NuttX to the Atmel AVR32DEV1 board. That board is
based on the Atmel AT32UC3B0256 MCU and uses a specially patched
version of the GNU toolchain: The patches provide support for the
AVR32 family. That patched GNU toolchain is available only from the
Atmel website. STATUS: This port is functional but very basic. There
are configurations for NSH and the OS test.

boards/arm/stm32/axoloti
Support for the Axoloti synthesizer board based on the STMicro
STM32F427IGH6 MCU. See: http://www.axoloti.com/

boards/arm/stm32/b-g474e-dpow1
Initial support for booting NuttX to a functional NSH prompt on the
STMicro B-G474E-DPOW1 Discovery kit with STM32G474RE MCU.

boards/arm/stm32/nucleo-g431kb
STMicro Nucleo G431KB board based on the STMicro STM32G431KB MCU.

boards/arm/stm32/nucleo-g431rb
STMicro Nucleo G431RB board based on the STMicro STM32G431RB MCU.

boards/arm/stm32f0l0g0/b-l072z-lrwan1
STMicro STM32L0 Discovery kit with LoRa/SigFox based on STM32L072CZ MCU.

boards/arm/lpc43xx/bambino-200e
Micromint Bambino board. This board is based on the LPC4330FBD144.

boards/arm/c5471/c5471evm
This is a port to the Spectrum Digital C5471 evaluation board. The
TMS320C5471 is a dual core processor from TI with an ARM7TDMI general
purpose processor and a c54 DSP. It is also known as TMS320DA180 or just DA180.
NuttX runs on the ARM core and is built with a GNU arm-nuttx-elf toolchain*.
This port is complete and verified.

boards/arm/tiva/launchxl_cc1310
Port to the TI SimpleLink CC1310 LaunchPad Evaluation Kit (LAUNCHXL-CC1310)
featuring the SimpleLinkCC1310 chip. This board features the CC1310F128
part with 128Kb of FLASH and 20Kb of SRAM.

boards/arm/tiva/launchxl_cc1312r1
Port to the TI SimpleLink CC1312R1 LaunchPad Evaluation Kit (LAUNCHXL-CC1312R1)
featuring the SimpleLinkCC1312R1 chip.

boards/arm/stm32/clicker2-stm32
Mikroe Clicker2 STM32 board based on the STMicro STM32F407VGT6 MCU.

boards/arm/stm32/cloudctrl
Darcy'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.

boards/hc/m9s12/demo9s12ne64
NXP/FreeScale DMO9S12NE64 board based on the MC9S12NE64 hcs12 cpu. This
port uses the m9s12x GCC toolchain. STATUS: (Still) under development; it
is code complete but has not yet been verified.

boards/arm/tiva/dk-tm4c129x
This is the port of NuttX to the Tiva DK-TM4C129x Connected Development Kit. The
Tiva DK-TM4C129x features the TM4C129XNCZAD MCU.

boards/arm/lpc31xx/ea3131
Embedded Artists EA3131 Development board. This board is based on the
an NXP LPC3131 MCU. This OS is built with the arm-nuttx-elf toolchain*.
STATUS: This port is complete and mature.

boards/arm/lpc31xx/ea3152
Embedded Artists EA3152 Development board. This board is based on the
an NXP LPC3152 MCU. This OS is built with the arm-nuttx-elf toolchain*.
STATUS: This port is has not be exercised well, but since it is
a simple derivative of the ea3131, it should be fully functional.

boards/arm/tiva/eagle100
Micromint Eagle-100 Development board. This board is based on the
an ARM Cortex-M3 MCU, the Luminary LM3S6918. This OS is built with the
arm-nuttx-elf toolchain*. STATUS: This port is complete and mature.

boards/arm/efm32/efm32-g8xx-stk
The port of NuttX to the EFM32 Gecko Starter Kit (EFM32-G8XX-STK).

boards/arm/efm32/efm32gg-stk3700
The port of NuttX to the EFM32 Giant Gecko Starter Kit
(EFM32GG-STK3700).

boards/arm/tiva/ekk-lm3s9b96
TI/Stellaris EKK-LM3S9B96 board. This board is based on the
an EKK-LM3S9B96 which is a Cortex-M3.

boards/arm/stm32/emw3162
A configuration for the EMW3162 Wi-Fi board
(https://www.waveshare.com/wiki/EMW3162). This board features
the STM32F205RGY6 MCU from STMicro.

boards/xtensa/esp32/esp-core
The ESP32 is a dual-core system from Espressif with two Harvard architecture
Xtensa LX6 CPUs. All embedded memory, external memory and peripherals are
located on the data bus and/or the instruction bus of bus of these CPUs.
With some minor exceptions, the address mapping of two CPUs is symmetric,
meaning they use the same addresses to access the same memory.

boards/z80/ez80/ez80f0910200kitg
ez80Acclaim! Microcontroller. This port use the Zilog ez80f0910200kitg
development kit, eZ80F091 part, and the Zilog ZDS-II Windows command line
tools. The development environment is Cygwin under WinXP.

boards/z80/ez80/ez80f0910200zco
ez80Acclaim! Microcontroller. This port use the Zilog ez80f0910200zco
development kit, eZ80F091 part, and the Zilog ZDS-II Windows command line
tools. The development environment is Cygwin under WinXP.

boards/arm/stm32/fire-stm32v2
A configuration for the M3 Wildfire STM32 board. This board is based on the
STM32F103VET6 chip. See http://firestm32.taobao.com . Version 2 and 3 of
the boards are supported but only version 2 has been tested.

boards/mips/pic32mz/flipnclick-pic32mz
Board support for the Mikroe Flip&Click PIC32MZ board. This board is a
chipKit Arduino-compatible board (but can also be used with the Mikroe
bootloader). It has with four Mikroe Click bus interfaces in addition to
standard Arduino connectors. This board features the Microchip
PIC32MZ2048EFH100 MCU running at 200 MHz (252 MHz capable).

boards/arm/sam34/flipnclick-sam3x
Board support for the Mikroe Flip&Click STM32X board. This board is an
Arduino-Due work-alike with four Mikroe Click bus interfaces. Like the
Arduino DUE, this board features the Atmel ATSAM3X8E MCU running at 84
MHz.

boards/arm/kinetis/freedom-k28f
This port uses the NXP/FreeScale FREEDOM-K28F development board. This
board uses the Kinetis K28F MK28FN2M0VMI15 Cortex-M4 MCU.

boards/arm/kinetis/freedom-k64f
This port uses the NXP/FreeScale FREEDOM-K64F development board. This board
uses the Kinetis K64 MK64FN1M0VLL12 Cortex-M4 MCU.

boards/arm/kl/freedom-kl25z
boards/arm/kl/freedom-kl26z
These configurations are for the NXP/FreeScale Freedom KL25Z and very similar
KL26Z board. The Freedom-KL25Z features the K25Z120LE3AN chip; the
Freedom-KL26Z has the K26Z128VLH4 chip. These are separate configurations
because of minor differences in the on-board logic. Both include a
built-in SDA debugger.

boards/arm/stm32/hymini-stm32v
A configuration for the HY-Mini STM32v board. This board is based on the
STM32F103VCT chip.

boards/arm/kinetis/kwikstik-k40.
Kinetis K40 Cortex-M4 MCU. This port uses the NXP/FreeScale KwikStik-K40
development board.

boards/arm/tms570/launchxl-tms57004
TI Hercules TMS570LS04x/03x LaunchPad Evaluation Kit (LAUNCHXL-TMS57004)
featuring the Hercules TMS570LS0432PZ chip.

boards/arm/lpc17xx_40xx/lincoln60
NuttX port to the Micromint Lincoln 60 board.

boards/arm/tiva/lm3s6432-s2e
Stellaris RDK-S2E Reference Design Kit and the MDL-S2E Ethernet to
Serial module.

boards/arm/tiva/lm3s6965-ek
Stellaris LM3S6965 Evaluation Kit. This board is based on the
an ARM Cortex-M3 MCU, the Luminary/TI LM3S6965. This OS is built with the
arm-nuttx-elf toolchain*. STATUS: This port is complete and mature.

boards/arm/tiva/lm3s8962-ek
Stellaris LMS38962 Evaluation Kit.

boards/arm/tiva/lm4f120-launchpad
This is the port of NuttX to the Stellaris LM4F120 LaunchPad. The
Stellaris LM4F120 LaunchPad Evaluation Board is a low-cost evaluation
platform for ARM Cortex-M4F-based microcontrollers from Texas
Instruments.

boards/arm/lpc17xx_40xx/lpcxpresso-lpc1768
Embedded Artists base board with NXP LPCExpresso LPC1768. This board
is based on the NXP LPC1768. The Code Red toolchain is used by default.
STATUS: Under development.

boards/arm/lpc54xx/lpcxpresso-lpc54628
NXP LPCExpresso LPC54628. This board is based on the NXP LPC54628.

boards/arm/lpc43xx/lpc4330-xplorer
NuttX port to the LPC4330-Xplorer board from NGX Technologies featuring
the NXP LPC4330FET100 MCU

boards/arm/lpc43xx/lpc4337-ws
NuttX port to the WaveShare LPC4337-ws board featuring the NXP LPC4337JBD144
MCU.

boards/arm/lpc43xx/lpc4357-evb
NuttX port to the LPC4357-EVB board from Embest featuring the NXP
LPC4357FET256 MCU. Based on the LPC4300 Xplorer port and provided by
Toby Duckworth.

boards/arm/lpc43xx/lpc4370-link2
NuttX port to the NXP LPC4370-Link2 development board featuring the NXP
LPC4370FET100 MCU. Based on the LPC4300 Xplorer port and provided by
Lok Tep.

boards/arm/lpc17xx_40xx/lx_cpu
This port uses the PiKRON LX_CPU board. See the
http://pikron.com/pages/products/cpu_boards/lx_cpu.html for further
information. This board features the NXP LPC4088 (compatible with
LPC1788) and Xilinx Spartan 6 XC6SLX9

boards/z80/ez80/makerlisp
This port use the MakerLisp machine based on an eZ80F091 ez80Acclaim!
Microcontroller, and the Zilog ZDS-II Windows command line tools. The
development environment is Cygwin under Windows. A Windows native
development environment is available but has not been verified.

boards/arm/stm32/maple
NuttX support for the LeafLab's Maple and Maple Mini boards. These boards
are based on the STM32F103RBT6 chip for the standard version and on the
STM32F103CBT6 for the mini version (See http://leaflabs.com/docs/hardware/maple.html)

boards/arm/max326xx/max32660-evsys
The configurations in this directory support the Maxim Integrated
MAX32660-EVSYS board.

boards/arm/lpc17xx_40xx/mbed
The configurations in this directory support the mbed board (http://mbed.org)
that features the NXP LPC1768 microcontroller. This OS is also built
with the arm-nuttx-elf toolchain*. STATUS: Contributed.

boards/arm/lpc17xx_40xx/mcb1700
Board support for the Keil MCB1700

boards/arm/samd5e5/metro-m4
Th configurations in this directory are part of the port of NuttX to the
Adafruit Metro M4. The Metro M4 uses a Arduino form factor and and pinout.
It's powered with an ATSAMD51J19

boards/arm/stm32/mikroe-stm32f4
This is the port of NuttX to the MikroElektronika Mikromedia for STM32F4
development board. Contributed by Ken Petit.

boards/misoc/lm32/misoc
This directory holds the port to NuttX running on a Qemu LM32 system.
You can find the Qemu setup at https://bitbucket.org/key2/qemu

boards/arm/lpc214x/mcu123-lpc214x
This port is for the NXP LPC2148 as provided on the mcu123.com
lpc214x development board. This OS is also built with the arm-nuttx-elf
toolchain*. The port supports serial, timer0, spi, and usb.

boards/avr/at90usb/micropendous3
This is a port to the Opendous Micropendous 3 board. This board may
be populated with either an AVR AT90USB646, 647, 1286, or 1287 MCU.
Support is configured for the AT90USB647.

boards/mips/pic32mx/mirtoo
This is the port to the DTX1-4000L "Mirtoo" module. This module uses MicroChip
PIC32MX250F128D. See http://www.dimitech.com/ for further information.

boards/avr/atmega/moteino-mega
This is placeholder for the LowPowerLab MoteinoMEGA that is based
on the Atmel AVR ATMega1284P MCU. There is not much there yet and what is
there is untested due to tool-related issues.

boards/arm/moxart/moxa
Moxa NP51x0 series of 2-port advanced RS-232/422/485 serial device servers.

boards/hc/mcs92s12ne6/ne64badge
Future Electronics Group NE64 /PoE Badge board based on the
MC9S12NE64 hcs12 cpu. This port uses the m9s12x GCC toolchain.
STATUS: Under development. The port is code-complete but has
not yet been fully tested.

boards/arm/nrf52/nrf52-feather
NuttX port to the Adafruit nRF52832 Feather board

boards/arm/nrf52/nrf52832-dk
NuttX port to the Nordic nRF52832 Development Kit (PCA10040)

boards/arm/nrf52/nrf52840-dk
NuttX port to the Nordic nRF52840 Development Kit (PCA10056)

boards/arm/nrf52/nrf52840-dongle
NuttX port to the Nordic nRF52840 Dongle (PCA10059)

boards/arm/dm320/ntosd-dm320
This port uses the Neuros OSD v1.0 Dev Board with a GNU arm-nuttx-elf
toolchain*: see

http://wiki.neurostechnology.com/index.php/OSD_1.0_Developer_Home

There are some differences between the Dev Board and the currently
available commercial v1.0 Boards. See

http://wiki.neurostechnology.com/index.php/OSD_Developer_Board_v1

NuttX operates on the ARM9EJS of this dual core processor.
STATUS: This port is code complete, verified, and included in the
NuttX 0.2.1 release.

boards/arm/stm32f7/nucleo-144
STMicro Nucleo-144 development board family. Included support for (1) the
Nucleo-F767ZG board featuring the STM32F746ZGT6U MCU. The STM32F746ZGT6U
is a 216MHz Cortex-M7 operation with 1024Kb Flash memory and 320Kb SRAM.
And (2) the Nucleo-F746ZG board featuring the STM32F767ZIT6 MCU. The
STM32F767ZIT6 is a 216MHz Cortex-M7 operation with 2048Kb Flash memory
and 512Kb SRAM.

boards/arm/stm32f0l0g0/nucleo-f072rb
STMicro Nucleo F072RB board based on the STMicro STM32F072RBT6 MCU.

boards/arm/stm32/nucleo-f4x1re
STMicro ST Nucleo F401RE and F411RE boards. See
http://mbed.org/platforms/ST-Nucleo-F401RE and
http://developer.mbed.org/platforms/ST-Nucleo-F411RE for more
information about these boards.

boards/arm/stm32/nucleo-f410rb
NuttX configuration for the STMicro NucleoF410RB board from ST Micro.
This board features the STM32F410RB 100MHz Cortex-M4 with 128 KB Flash
and 32 KB SRAM.

boards/arm/stm32/nucleo-f303re
STMicro ST Nucleo F303RE board. Contributed by Paul Alexander Patience.

boards/arm/stm32f0l0g0/nucleo-l073rz
STMicro STM32L0 Discovery kit with LoRa/SigFox based on STM32L072CZ MCU.

boards/arm/nuc1xx/nutiny-nuc120
This is the port of NuttX to the NuvoTon NuTiny-SDK-NUC120 board. This
board has the NUC120LE3AN chip with a built-in NuLink debugger.

boards/arm/efm32/olimex-efm32g880f128-stk
This is the port of NuttX to the Olimex EFM32G880F128-STK development
board.

boards/arm/lpc17xx_40xx/olimex-lpc1766stk
This port uses the Olimex LPC1766-STK board and a GNU GCC toolchain* under
Linux or Cygwin. STATUS: Complete and mature.

boards/arm/lpc2378/olimex-lpc2378
This port uses the Olimex-lpc2378 board and a GNU arm-nuttx-elf toolchain* under
Linux or Cygwin. STATUS: ostest and NSH configurations available.
This port for the NXP LPC2378 was contributed by Rommel Marcelo.

boards/arm/stm32/olimex-stm32-h405
This port uses the Olimex STM32 H405 board and a GNU arm-nuttx-elf
toolchain* under Linux or Cygwin. See the http://www.olimex.com for
further information. This board features the STMicro STM32F405RGT6 MCU.
Contributed by Martin Lederhilger.

boards/arm/stm32/olimex-stm32-h407
This port uses the Olimex STM32 H407 board and a GNU arm-nuttx-elf
toolchain* under Linux or Cygwin. See the http://www.olimex.com for
further information. This board features the STMicro STM32F407ZGT6 (144
pins). Contributed by Neil Hancock.

boards/arm/stm32/olimex-stm32-e407
Olimex STM32 E407 board based on the STMicro STM32F407ZGT6 (144pins).
Contributed by Mateusz Szafoni.

boards/arm/stm32/olimex-stm32-p107
This port uses the Olimex STM32-P107 board (STM32F107VC) and a GNU arm-nuttx-elf
toolchain* under Linux or Cygwin. See the https://www.olimex.com/dev/stm32-p107.html
for further information. Contributed by Max Holtzberg.

boards/arm/stm32/olimex-stm32-p207
This port uses the Olimex STM32-P207 board (STM32F207ZE) and a GNU arm-nuttx-elf
toolchain under Linux or Cygwin. See the https://www.olimex.com/dev/stm32-p207.html
for further information. Contributed by Martin Lederhilger.

boards/arm/stm32/olimex-stm32-p407
This port uses the Olimex STM32-P407 board (STM32F407ZG) and a GNU arm-nuttx-elf
toolchain under Linux or Cygwin. See the https://www.olimex.com/dev/stm32-p407.html
for further information.

boards/arm/stm32/olimexino-stm32
This port uses the Olimexino STM32 board (STM32F103RBT6) and a GNU arm-nuttx-elf
toolchain* under Linux or Cygwin. See the http://www.olimex.com for further\
information. Contributed by David Sidrane.

boards/arm/str71x/olimex-strp711
This port uses the Olimex STR-P711 board and a GNU arm-nuttx-elf toolchain* under
Linux or Cygwin. See the http://www.olimex.com/dev/str-p711.html" for
further information. STATUS: Configurations for the basic OS test and NSH
are complete and verified.

boards/arm/stm32/omnibusf4
Flight controllers compatible with the OMINBUSF4 Betaflight target

boards/or1k/mor1kx/or1k
Generic OpenRISC board.

boards/arm/a1x/pcduino-a10
This directory contains the port of NuttX to the pcDuino v1 board
See http://www.pcduino.com/ for information about pcDuino Lite, v1,
and v2. These boards are based around the Allwinner A10 Cortex-A8 CPU.
I have not compared these boards in detail, but I believe that the
differences are cosmetic. This port was developed on the v1 board, but
the others may be compatible.

boards/z80/z180/p112
The P112 is notable because it was the first of the hobbyist single board
computers to reach the production stage. The P112 hobbyist computers
were relatively widespread and inspired other hobbyist centered home brew
computing projects such as N8VEM home brew computing project. The P112
project still maintains many devoted enthusiasts and has an online
repository of software and other information.

The P112 computer originated as a commercial product of "D-X Designs Pty
Ltd" of Australia. They describe the computer as "The P112 is a stand-alone
8-bit CPU board. Typically running CP/M (tm) or a similar operating system,
it provides a Z80182 (Z-80 upgrade) CPU with up to 1MB of memory, serial,
parallel and diskette IO, and realtime clock, in a 3.5-inch drive form factor.
Powered solely from 5V, it draws 150mA (nominal: not including disk drives)
with a 16MHz CPU clock. Clock speeds up to 24.576MHz are possible."

The P112 board was last available new in 1996 by Dave Brooks. In late 2004
on the Usenet Newsgroup comp.os.cpm, talk about making another run of P112
boards was discussed. David Griffith decided to produce additional P112 kits
with Dave Brooks blessing and the assistance of others. In addition Terry
Gulczynski makes additional P112 derivative hobbyist home brew computers.
Hal Bower was very active in the mid 1990's on the P112 project and ported
the "Banked/Portable BIOS".

Dave Brooks was successfully funded through Kickstarter for and another
run of P112 boards in November of 2012.

boards/arm/stm32/photon
A configuration for the Photon Wifi board from Particle Devices
(https://www.particle.io). This board features the STM32F205RGY6 MCU from
STMicro.

boards/mips/pic32mx/pic32mx-starterkit
This directory contains the port of NuttX to the Microchip PIC32 Ethernet
Starter Kit (DM320004) with the Multimedia Expansion Board (MEB, DM320005).
See www.microchip.com for further information.

boards/mips/pic32mx/pic32mx7mmb
This directory will (eventually) contain the port of NuttX to the
Mikroelektronika PIC32MX7 Multimedia Board (MMB). See
http://www.mikroe.com/ for further information.

boards/mips/pic32mz/pic32mz-starterkit
This directory contains the port of NuttX to the Microchip PIC32MZ
Embedded Connectivity (EC) Starter Kit. There are two configurations of
the starter kit:

1) The PIC32MZ Embedded Connectivity Starter Kit based on the
PIC32MZ2048ECH144-I/PH chip (DM320006), and
2) The PIC32MZ Embedded Connectivity Starter Kit based on the
PIC32MZ2048ECM144-I/PH w/Crypto Engine (DM320006-C)

See www.microchip.com for further information.

boards/arm/lpc17xx_40xx/pnev5180b
NXP Semiconductors' PN5180 NFC Frontend Development Kit. This board is
based on the NXP LPC1769 MCU.

boards/x86/qemu/qemu-i486
Port of NuttX to QEMU in i486 mode. This port will also run on real i486
hardware (Google the Bifferboard).

boards/arm/s32k1xx/s32k118evb
This directory holds the port of NuttX to the NXP S32K118EVB board
featuring the S32K118 Cortex-M0+.

boards/arm/s32k1xx/s32k146evb
This directory holds the port of NuttX to the NXP S32K146EVB board
featuring the S32K146 Cortex-M4F.

boards/arm/s32k1xx/s32k148evb
This directory holds the port of NuttX to the NXP S32K148EVB board
featuring the S32K148 Cortex-M4F.

boards/arm/imx6/sabre-6quad
This directory holds a port of NuttX to the NXP/Freescale Sabre board
featuring the iMX 6Quad CPU.

boards/arm/sama5/sama5d2-xult
This is the port of NuttX to the Microchip SAMA5D2-Xplained Ultra development
board. This board features the Microchip SAMA5D27. See
https://www.microchip.com/Developmenttools/ProductDetails/ATSAMA5D2C-XULT

boards/arm/sama5/giant-board
This is the port of NuttX to the Groboards Giant Board board. This board
features the Atmel SAMA5D27C-D1G. See http://groboards.com/giant-board.

boards/arm/sama5/sama5d3x-ek
This is the port of NuttX to the Atmel SAMA5D3x-EK development boards
(where x=1,3,4, or 5). These boards feature the Atmel SAMA5D3
microprocessors. Four different SAMA5D3x-EK kits are available

- SAMA5D31-EK with the ATSAMA5D1 (http://www.atmel.com/devices/sama5d31.aspx)
- SAMA5D33-EK with the ATSAMA5D3 (http://www.atmel.com/devices/sama5d33.aspx)
- SAMA5D34-EK with the ATSAMA5D4 (http://www.atmel.com/devices/sama5d34.aspx)
- SAMA5D35-EK with the ATSAMA5D5 (http://www.atmel.com/devices/sama5d35.aspx)

The each consist of an identical base board with different plug-in modules
for each CPU. An option 7 inch LCD is also available. All four boards
are supported by NuttX with a simple reconfiguration of the processor
type.

boards/arm/sama5/sama5d3-xplained
This is the port of NuttX to the Atmel SAMA5D3x-Xplained development board.
This board features the Atmel SAMA5D36. See
http://www.atmel.com/devices/sama5d36.aspx.

boards/arm/sama5/sama5d4-ek
This is the port of NuttX to the Atmel SAMA5D4-EK development board.
This board features the Atmel SAMA5D44. See http://www.atmel.com.

boards/arm/samd2l2/samd20-xplained
The port of NuttX to the Atmel SAMD20-Xplained Pro development board. This
board features the ATSAMD20J18A MCU (Cortex-M0+ with 256KB of FLASH and
32KB of SRAM).

boards/arm/samd2l2/samd21-xplained
The port of NuttX to the Atmel SAMD21-Xplained Pro development board. This
board features the ATSAMD21J18A MCU (Cortex-M0+ with 256KB of FLASH and
32KB of SRAM).

boards/arm/sam34/sam3u-ek
The port of NuttX to the Atmel SAM3U-EK development board.

boards/arm/sam34/sam4cmp-db
The port of NuttX to the Atmel SAM4CMP-DB development board.

boards/arm/sam34/sam4e-ek
The port of NuttX to the Atmel SAM4E-EK development board. This board
features the SAM4E16 MCU running at up to 120MHz.

boards/arm/sam34/sam4l-xplained
The port of NuttX to the Atmel SAM4L-Xplained development board.

boards/arm/sam34/sam4s-xplained
The port of NuttX to the Atmel SAM4S-Xplained development board.

boards/arm/sam34/sam4s-xplained-pro
The port of NuttX to the Atmel SAM4S-Xplained Pro development board.

boards/arm/samv7/same70-xplained
The port of NuttX to the Atmel SAME70 Xplained evaluation board.

boards/arm/samv7/samv71-xult
The port of NuttX to the Atmel SAMV71 Xplained Ultra evaluation board.

boards/sim/sim/sim
A user-mode port of NuttX to the x86 Linux platform is available.
The purpose of this port is primarily to support OS feature development.
This port does not support interrupts or a real timer (and hence no
round robin scheduler) Otherwise, it is complete.

boards/arm/stm32/shenzhou
This is the port of NuttX to the Shenzhou development board from
www.armjishu.com. This board features the STMicro STM32F107VCT MCU.

boards/renesas/m16c/skp16c26
Renesas M16C processor on the Renesas SKP16C26 StarterKit. This port
uses the GNU m32c toolchain. STATUS: The port is complete but untested
due to issues with compiler internal errors.

boards/arm/stm32/stm3210e-eval
STMicro STM3210E-EVAL development board based on the STMicro STM32F103ZET6
microcontroller (ARM Cortex-M3). This port uses the GNU Cortex-M3
toolchain.

boards/arm/stm32/stm3220g-eval
STMicro STM3220G-EVAL development board based on the STMicro STM32F407IG
microcontroller (ARM Cortex-M3).

boards/arm/stm32/stm3240g-eval
STMicro STM3240G-EVAL development board based on the STMicro STM32F103ZET6
microcontroller (ARM Cortex-M4 with FPU). This port uses a GNU Cortex-M4
toolchain (such as CodeSourcery).

boards/arm/stm32/stm32butterfly2
Kamami stm32butterfly2 development board with optional ETH phy. See
https://kamami.pl/zestawy-uruchomieniowe-stm32/178507-stm32butterfly2.html

boards/arm/stm32/stm32f051-discovery
STMicro STM32F051-Discovery board based on the STMicro ARCH_CHIP_STM32F051R8
MCU.

boards/arm/stm32/stm32f072-discovery
STMicro STM32F072-Discovery board based on the STMicro ARCH_CHIP_STM32F072RB
MCU.

boards/arm/stm32/stm32f103-minimum
Generic STM32F103C8T6 Minimum ARM Development Board.

boards/arm/stm32/stm32f4discovery
STMicro STM32F4-Discovery board based on the STMicro STM32F407VGT6 MCU.

boards/arm/stm32/stm32f411e-disco
This is a minimal configuration that supports low-level test of the
STMicro STM32F411E-Discovery Board.

boards/arm/stm32/stm32f429i-disco
STMicro STM32F429I-Discovery board based on the STMicro STM32F429ZIT6 MCU.

boards/arm/stm32f7/stm32f746g-disco
STMicro STM32F746G-DISCO development board featuring the STM32F746NGH6
MCU. The STM32F746NGH6 is a 216MHz Cortex-M7 operation with 1024Kb Flash
memory and 300Kb SRAM.

boards/arm/stm32f7/stm32f746g-ws
Waveshare STM32F746 development board featuring the STM32F746IG MCU.

boards/arm/stm32l4/stm32l476-mdk
Motorola Mods Development Board (MDK) features STM32L476ME MCU.
The STM32L476ME is a Cortex-M4 optimised for low-power operation
at up to 80MHz operation with 1024Kb Flash memory and 96+32Kb SRAM.

boards/arm/stm32f7/stm32f769i-disco
NuttX configurations for the STMicro STM32F769I-DISCO development board
featuring the STM32F769NIH6 MCU. The STM32F769NIH6 is a 216MHz Cortex-M7
operating with 2048K Flash memory and 512Kb SRAM.

boards/arm/stm32l4/stm32l476vg-disco
STMicro STM32L476VG_DISCO development board featuring the STM32L476VG
MCU. The STM32L476VG is a Cortex-M4 optimised for low-power operation
at up to 80MHz operation with 1024Kb Flash memory and 96+32Kb SRAM.

boards/arm/stm32/stm32ldiscovery
STMicro STM32L-Discovery board based on the STMicro STM32L152RB MCU.

boards/arm/stm32/stm32vldiscovery
STMicro STM32VL-Discovery board based on the STMicro STM32F100RB MCU.

boards/mips/pic32mx/sure-pic32mx
The "Advanced USB Storage Demo Board," Model DB-DP11215, from Sure
Electronics (http://www.sureelectronics.net/). This board features
the MicroChip PIC32MX440F512H. See also
http://www.sureelectronics.net/goods.php?id=1168 for further
information about the Sure DB-DP11215 board.

boards/avr/at90usb/teensy-2.0
This is the port of NuttX to the PJRC Teensy++ 2.0 board. This board is
developed by http://pjrc.com/teensy/. The Teensy++ 2.0 is based
on an Atmel AT90USB1286 MCU.

boards/arm/kinetis/teensy-3.x
This is the port of NuttX to the Teensy-3.1 from PJRC
(https://www.pjrc.com/). The Teensy-3.1 features the Freescale
MK30DX256VLH7 chip (now NXP). The MK30DX256VLH7 is a 64-pin Cortex-M4
running at 72MHz. It has 256KiB of program FLASH memory and 64KiB of
SRAM. For more information about the Teensy 3.1, see

https://www.pjrc.com/teensy/teensy31.html
https://www.pjrc.com/store/teensy31.html

This board configuration can also be used with the older Teensy-3.0. The
Teensy-3.0 has the same schematic (although some pins are not used on the
Teensy-3.0). the primary difference is that the Teensy 3.0 has a
MK30DX128VLH5 with slightly less capability.

boards/arm/imxrt/teensy-4.x
This is the port of NuttX to the PJRC Teensy++ 4.x board. This board is
developed by http://pjrc.com/teensy/. The Teensy++ 4.x is based
on an NXP MIMXRT1062DVL6A MCU. The port can support both Teensy 4.0 and
Teensy 4.1 boards.

https://www.pjrc.com/store/teensy40.html
https://www.pjrc.com/store/teensy41.html

boards/arm/kl/teensy-lc
This is the port of nuttx for the Teensy LC board. The Teensy LC
is a DIP style breakout board for the MKL25Z64 and comes with a USB
based bootloader.

boards/arm/tiva/tm4c123g-launchpad
This is the port of NuttX to the Tiva TM4C123G LaunchPad. The
Tiva TM4C123G LaunchPad Evaluation Board is a low-cost evaluation
platform for ARM Cortex-M4F-based microcontrollers from Texas
Instruments.

boards/arm/tiva/tm4c1294-launchpad
This is the port of NuttX to the Tiva TM4C1294 LaunchPad. The
Tiva TM4C123G LaunchPad Evaluation Board is a low-cost evaluation
platform for ARM Cortex-M4F-based microcontrollers from Texas
Instruments.

boards/arm/tmx570/tms570ls31x-usb-kit
TI Hercules TMS570LS31xx Evaluation Kit (TMDS570ls31xx USB Kit)
featuring the Hercules TMS570LS3137ZWT chip.

boards/arm/kinetis/twr-k60n512
Kinetis K60 Cortex-M4 MCU. This port uses the FreeScale TWR-K60N512
development board.

boards/arm/kinetis/twr-k64f120m
Kinetis K64 Cortex-M4 MCU. This port uses the FreeScale TWR-K64F120M
development board.

boards/mips/pic32mx/ubw32
This is the port to the Sparkfun UBW32 board. This port uses the original v2.4
board which is based on the MicroChip PIC32MX460F512L. See
http://www.sparkfun.com/products/8971. This older version has been replaced
with this board http://www.sparkfun.com/products/9713. See also
http://www.schmalzhaus.com/UBW32/.

boards/renesas/sh1/us7032evb1
This is a port of the Hitachi SH-1 on the Hitachi SH-1/US7032EVB1 board.
STATUS: Work has just began on this port.

boards/arm/stm32/viewtool-stm32f107
NuttX configurations for the ViewTool STM32F103/F107 V1.2 board. This
board may be fitted with either: (1) STM32F107VCT6 or (2) STM32F103VCT6.
See http://www.viewtool.com/ for further information.

config/xmc4500-relax
Infineon XMC4500 Relax Lite v1

config/xmc4700-relax
Infineon XMC4700 Relax

boards/z16/z16f/z16f2800100zcog
z16f Microcontroller. This port use the Zilog z16f2800100zcog
development kit and the Zilog ZDS-II Windows command line tools. The
development environment is Cygwin under WinXP.

boards/z80/ez80/z20x
Microcontroller. This directory holds the port of NuttX to the z80x board
based on an ez80Acclaim! eZ80F091 microcontroller.

boards/z80/z80/z80sim
z80 Microcontroller. This port uses a Z80 instruction set simulator
called z80sim. This port also uses the SDCC toolchain
(http://sdcc.sourceforge.net/") (verified with version 2.6.0).

boards/z80/z8/z8encore000zco
z8Encore! Microcontroller. This port use the Zilog z8encore000zco
development kit, Z8F6403 part, and the Zilog ZDS-II Windows command line
tools. The development environment is Cygwin under WinXP.

boards/z80/z8/z8f64200100kit
z8Encore! Microcontroller. This port use the Zilog z8f64200100kit
development kit, Z8F6423 part, and the Zilog ZDS-II Windows command line
tools. The development environment is Cygwin under WinXP.

boards/arm/lpc214x/zp214xpa
This port is for the NXP LPC2148 as provided on the The0.net
ZPA213X/4XPA development board. Includes support for the
UG-2864AMBAG01 OLED also from The0.net

boards/arm/lpc17xx_40xx/zkit-arm-1769
Zilogic System's ARM development Kit, ZKIT-ARM-1769. This board is based
on the NXP LPC1769. The NuttX Buildroot toolchain is used by default.

Configuring NuttX
^^^^^^^^^^^^^^^^^

Configuring NuttX requires only copying

boards/////Make.def to ${TOPDIR}/Make.defs
boards/////defconfig to ${TOPDIR}/.config

tools/configure.sh
There is a script that automates these steps. The following steps will
accomplish the same configuration:

tools/configure.sh :

There is an alternative Windows batch file that can be used in the
windows native environment like:

tools\configure.bat :

See tools/README.txt for more information about these scripts.

And if your application directory is not in the standard location (../apps
or ../apps-), then you should also specify the location of the
application directory on the command line like:

cd tools
./configure.sh -a :

Building Symbol Tables
^^^^^^^^^^^^^^^^^^^^^^

Symbol tables are needed at several of the binfmt interfaces in order to bind
a module to the base code. These symbol tables can be tricky to create and
will probably have to be tailored for any specific application, balancing
the number of symbols and the size of the symbol table against the symbols
required by the applications.

The top-level System.map file is one good source of symbol information
(which, or course, was just generated from the top-level nuttx file
using the GNU 'nm' tool).

There are also common-separated value (CSV) values in the source try that
provide information about symbols. In particular:

nuttx/syscall/syscall.csv - Describes the NuttX RTOS interface, and
nuttx/lib/libc.csv - Describes the NuttX C library interface.

There is a tool at nuttx/tools/mksymtab that will use these CSV files as
input to generate a generic symbol table. See nuttx/tools/README.txt for
more information about using the mksymtab tool.