12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989910010110210310410510610710810911011111211311411511611711811912012112212312412512612712812913013113213313413513613713813914014114214314414514614714814915015115215315415515615715815916016116216316416516616716816917017117217317417517617717817918018118218318418518618718818919019119219319419519619719819920020120220320420520620720820921021121221321421521621721821922022122222322422522622722822923023123223323423523623723823924024124224324424524624724824925025125225325425525625725825926026126226326426526626726826927027127227327427527627727827928028128228328428528628728828929029129229329429529629729829930030130230330430530630730830931031131231331431531631731831932032132232332432532632732832933033133233333433533633733833934034134234334434534634734834935035135235335435535635735835936036136236336436536636736836937037137237337437537637737837938038138238338438538638738838939039139239339439539639739839940040140240340440540640740840941041141241341441541641741841942042142242342442542642742842943043143243343443543643743843944044144244344444544644744844945045145245345445545645745845946046146246346446546646746846947047147247347447547647747847948048148248348448548648748848949049149249349449549649749849950050150250350450550650750850951051151251351451551651751851952052152252352452552652752852953053153253353453553653753853954054154254354454554654754854955055155255355455555655755855956056156256356456556656756856957057157257357457557657757857958058158258358458558658758858959059159259359459559659759859960060160260360460560660760860961061161261361461561661761861962062162262362462562662762862963063163263363463563663763863964064164264364464564664764864965065165265365465565665765865966066166266366466566666766866967067167267367467567667767867968068168268368468568668768868969069169269369469569669769869970070170270370470570670770870971071171271371471571671771871972072172272372472572672772872973073173273373473573673773873974074174274374474574674774874975075175275375475575675775875976076176276376476576676776876977077177277377477577677777877978078178278378478578678778878979079179279379479579679779879980080180280380480580680780880981081181281381481581681781881982082182282382482582682782882983083183283383483583683783883984084184284384484584684784884985085185285385485585685785885986086186286386486586686786886987087187287387487587687787887988088188288388488588688788888989089189289389489589689789889990090190290390490590690790890991091191291391491591691791891992092192292392492592692792892993093193293393493593693793893994094194294394494594694794894995095195295395495595695795895996096196296396496596696796896997097197297397497597697797897998098198298398498598698798898999099199299399499599699799899910001001100210031004100510061007100810091010101110121013101410151016101710181019102010211022102310241025102610271028102910301031103210331034103510361037103810391040104110421043104410451046104710481049105010511052105310541055105610571058105910601061106210631064106510661067106810691070107110721073107410751076107710781079108010811082108310841085108610871088108910901091109210931094109510961097109810991100110111021103110411051106110711081109111011111112111311141115111611171118111911201121112211231124112511261127112811291130113111321133113411351136113711381139114011411142114311441145114611471148114911501151115211531154115511561157115811591160116111621163116411651166116711681169117011711172117311741175117611771178117911801181118211831184118511861187118811891190119111921193119411951196119711981199120012011202120312041205120612071208120912101211121212131214121512161217121812191220122112221223122412251226122712281229123012311232123312341235123612371238123912401241124212431244124512461247124812491250125112521253125412551256125712581259126012611262126312641265126612671268126912701271127212731274127512761277127812791280128112821283128412851286128712881289129012911292129312941295129612971298129913001301130213031304130513061307130813091310131113121313131413151316131713181319132013211322132313241325132613271328132913301331133213331334133513361337133813391340134113421343134413451346134713481349135013511352135313541355135613571358135913601361136213631364136513661367136813691370137113721373137413751376137713781379138013811382138313841385138613871388138913901391139213931394139513961397139813991400140114021403140414051406140714081409141014111412141314141415 |
- /****************************************************************************
- * drivers/lcd/ssd1289.c
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership. The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
- /* Generic LCD driver for LCDs based on the Solomon Systech SSD1289 LCD
- * controller.
- * Think of this as a template for an LCD driver that you will probably have
- * to customize for any particular LCD hardware.
- *
- * References: SSD1289, Rev 1.3, Apr 2007, Solomon Systech Limited
- */
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <sys/types.h>
- #include <stdint.h>
- #include <stdbool.h>
- #include <string.h>
- #include <assert.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/arch.h>
- #include <nuttx/spi/spi.h>
- #include <nuttx/lcd/lcd.h>
- #include <nuttx/lcd/ssd1289.h>
- #include "ssd1289.h"
- #ifdef CONFIG_LCD_SSD1289
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /* Configuration ************************************************************/
- /* Check contrast selection */
- #if !defined(CONFIG_LCD_MAXCONTRAST)
- # define CONFIG_LCD_MAXCONTRAST 1
- #endif
- /* Check power setting */
- #if !defined(CONFIG_LCD_MAXPOWER) || CONFIG_LCD_MAXPOWER < 1
- # define CONFIG_LCD_MAXPOWER 1
- #endif
- #if CONFIG_LCD_MAXPOWER > 255
- # error "CONFIG_LCD_MAXPOWER must be less than 256 to fit in uint8_t"
- #endif
- /* Check orientation */
- #if defined(CONFIG_LCD_PORTRAIT)
- # if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) || defined(CONFIG_LCD_RPORTRAIT)
- # error "Cannot define both portrait and any other orientations"
- # endif
- #elif defined(CONFIG_LCD_RPORTRAIT)
- # if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
- # error "Cannot define both rportrait and any other orientations"
- # endif
- #elif defined(CONFIG_LCD_LANDSCAPE)
- # ifdef CONFIG_LCD_RLANDSCAPE
- # error "Cannot define both landscape and any other orientations"
- # endif
- #elif !defined(CONFIG_LCD_RLANDSCAPE)
- # define CONFIG_LCD_LANDSCAPE 1
- #endif
- /* Display/Color Properties *************************************************/
- /* Display Resolution */
- #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
- # define SSD1289_XRES 320
- # define SSD1289_YRES 240
- #else
- # define SSD1289_XRES 240
- # define SSD1289_YRES 320
- #endif
- /* Color depth and format */
- #define SSD1289_BPP 16
- #define SSD1289_COLORFMT FB_FMT_RGB16_565
- /* LCD Profiles *************************************************************/
- /* Many details of the controller initialization must, unfortunately, vary
- * from LCD to LCD. I have looked at the spec and at three different drivers
- * for LCDs that have SSD1289 controllers.
- * I have tried to summarize these differences as "LCD profiles"
- *
- * Most of the differences between LCDs are nothing more than a few minor bit
- * settings. The most significant difference between LCD drivers in is the
- * manner in which the LCD is powered up and in how the power controls are
- * set.
- * My suggestion is that if you have working LCD initialization code, you
- * should simply replace the code in ssd1289_hwinitialize with your working
- * code.
- */
- #if defined (CONFIG_SSD1289_PROFILE2)
- # undef SSD1289_USE_SIMPLE_INIT
- /* PWRCTRL1: AP=smalll-to-medium, DC=Flinex24, BT=+5/-4, DCT=Flinex24 */
- # define PWRCTRL1_SETTING \
- (SSD1289_PWRCTRL1_AP_SMMED | SSD1289_PWRCTRL1_DC_FLINEx24 | \
- SSD1289_PWRCTRL1_BT_p5m4 | SSD1289_PWRCTRL1_DCT_FLINEx24)
- /* PWRCTRL2: 5.1v */
- # define PWRCTRL2_SETTING SSD1289_PWRCTRL2_VRC_5p1V
- /* PWRCTRL3: x 2.165
- * NOTE:
- * Many drivers have bit 8 set which is not defined in the SSD1289 spec.
- */
- # define PWRCTRL3_SETTING SSD1289_PWRCTRL3_VRH_x2p165
- /* PWRCTRL4: VDV=9 + VCOMG */
- # define PWRCTRL4_SETTING (SSD1289_PWRCTRL4_VDV(9) | SSD1289_PWRCTRL4_VCOMG)
- /* PWRCTRL5: VCM=56 + NOTP */
- # define PWRCTRL5_SETTING (SSD1289_PWRCTRL5_VCM(56) | SSD1289_PWRCTRL5_NOTP)
- #elif defined (CONFIG_SSD1289_PROFILE3)
- # undef SSD1289_USE_SIMPLE_INIT
- /* PWRCTRL1: AP=smalll-to-medium, DC=Flinex24, BT=+5/-4, DCT=Flinex24 */
- # define PWRCTRL1_SETTING \
- (SSD1289_PWRCTRL1_AP_SMMED | SSD1289_PWRCTRL1_DC_FLINEx24 | \
- SSD1289_PWRCTRL1_BT_p5m4 | SSD1289_PWRCTRL1_DCT_FLINEx24)
- /* PWRCTRL2: 5.1v */
- # define PWRCTRL2_SETTING SSD1289_PWRCTRL2_VRC_5p1V
- /* PWRCTRL3: x 2.165
- * NOTE:
- * Many drivers have bit 8 set which is not defined in the SSD1289 spec.
- */
- # define PWRCTRL3_SETTING SSD1289_PWRCTRL3_VRH_x2p165
- /* PWRCTRL4: VDV=9 + VCOMG */
- # define PWRCTRL4_SETTING (SSD1289_PWRCTRL4_VDV(9) | SSD1289_PWRCTRL4_VCOMG)
- /* PWRCTRL5: VCM=56 + NOTP */
- # define PWRCTRL5_SETTING (SSD1289_PWRCTRL5_VCM(56) | SSD1289_PWRCTRL5_NOTP)
- #else /* if defined (CONFIG_SSD1289_PROFILE1) */
- # undef SSD1289_USE_SIMPLE_INIT
- # define SSD1289_USE_SIMPLE_INIT 1
- /* PWRCTRL1: AP=medium-to-large, DC=Fosc/4, BT=+5/-4, DCT=Fosc/4 */
- # define PWRCTRL1_SETTING \
- (SSD1289_PWRCTRL1_AP_MEDLG | SSD1289_PWRCTRL1_DC_FOSd4 | \
- SSD1289_PWRCTRL1_BT_p5m4 | SSD1289_PWRCTRL1_DCT_FOSd4)
- /* PWRCTRL2: 5.3v */
- # define PWRCTRL2_SETTING SSD1289_PWRCTRL2_VRC_5p3V
- /* PWRCTRL3: x 2.570
- * NOTE:
- * Many drivers have bit 8 set which is not defined in the SSD1289 spec.
- */
- # define PWRCTRL3_SETTING SSD1289_PWRCTRL3_VRH_x2p570
- /* PWRCTRL4: VDV=12 + VCOMG */
- # define PWRCTRL4_SETTING (SSD1289_PWRCTRL4_VDV(12) | SSD1289_PWRCTRL4_VCOMG)
- /* PWRCTRL5: VCM=60 + NOTP */
- # define PWRCTRL5_SETTING (SSD1289_PWRCTRL5_VCM(60) | SSD1289_PWRCTRL5_NOTP)
- #endif
- /****************************************************************************
- * Private Type Definition
- ****************************************************************************/
- /* This structure describes the state of this driver */
- struct ssd1289_dev_s
- {
- /* Publicly visible device structure */
- struct lcd_dev_s dev;
- /* Private LCD-specific information follows */
- FAR struct ssd1289_lcd_s *lcd; /* The contained platform-specific, LCD interface */
- uint8_t power; /* Current power setting */
- /* These fields simplify and reduce debug output */
- #ifdef CONFIG_DEBUG_LCD
- bool put; /* Last raster operation was a putrun */
- fb_coord_t firstrow; /* First row of the run */
- fb_coord_t lastrow; /* Last row of the run */
- fb_coord_t col; /* Column of the run */
- size_t npixels; /* Length of the run */
- #endif
- /* This is working memory allocated by the LCD driver for each LCD device
- * and for each color plane. This memory will hold one raster line of
- * data.
- * The size of the allocated run buffer must therefore be at least
- * (bpp * xres / 8). Actual alignment of the buffer must conform to the
- * bitwidth of the underlying pixel type.
- *
- * If there are multiple planes, they may share the same working buffer
- * because different planes will not be operate on concurrently. However,
- * if there are multiple LCD devices, they must each have unique run
- * buffers.
- */
- uint16_t runbuffer[SSD1289_XRES];
- };
- /****************************************************************************
- * Private Function Protototypes
- ****************************************************************************/
- /* Low Level LCD access */
- static void ssd1289_putreg(FAR struct ssd1289_lcd_s *lcd,
- uint8_t regaddr,
- uint16_t regval);
- #ifndef CONFIG_LCD_NOGETRUN
- static uint16_t ssd1289_readreg(FAR struct ssd1289_lcd_s *lcd,
- uint8_t regaddr);
- #endif
- static inline void ssd1289_gramwrite(FAR struct ssd1289_lcd_s *lcd,
- uint16_t rgbcolor);
- #ifndef CONFIG_LCD_NOGETRUN
- static inline void ssd1289_readsetup(FAR struct ssd1289_lcd_s *lcd,
- FAR uint16_t *accum);
- static inline uint16_t ssd1289_gramread(FAR struct ssd1289_lcd_s *lcd,
- FAR uint16_t *accum);
- #endif
- static void ssd1289_setcursor(FAR struct ssd1289_lcd_s *lcd,
- uint16_t column,
- uint16_t row);
- /* LCD Data Transfer Methods */
- #if 0 /* Sometimes useful */
- static void ssd1289_dumprun(FAR const char *msg, FAR uint16_t *run,
- size_t npixels);
- #else
- # define ssd1289_dumprun(m,r,n)
- #endif
- #ifdef CONFIG_DEBUG_LCD
- static void ssd1289_showrun(FAR struct ssd1289_dev_s *priv, fb_coord_t row,
- fb_coord_t col, size_t npixels, bool put);
- #else
- # define ssd1289_showrun(p,r,c,n,b)
- #endif
- static int ssd1289_putrun(fb_coord_t row, fb_coord_t col,
- FAR const uint8_t *buffer,
- size_t npixels);
- static int ssd1289_getrun(fb_coord_t row, fb_coord_t col,
- FAR uint8_t *buffer,
- size_t npixels);
- /* LCD Configuration */
- static int ssd1289_getvideoinfo(FAR struct lcd_dev_s *dev,
- FAR struct fb_videoinfo_s *vinfo);
- static int ssd1289_getplaneinfo(FAR struct lcd_dev_s *dev,
- unsigned int planeno,
- FAR struct lcd_planeinfo_s *pinfo);
- /* LCD RGB Mapping */
- #ifdef CONFIG_FB_CMAP
- # error "RGB color mapping not supported by this driver"
- #endif
- /* Cursor Controls */
- #ifdef CONFIG_FB_HWCURSOR
- # error "Cursor control not supported by this driver"
- #endif
- /* LCD Specific Controls */
- static int ssd1289_getpower(FAR struct lcd_dev_s *dev);
- static int ssd1289_setpower(FAR struct lcd_dev_s *dev, int power);
- static int ssd1289_getcontrast(FAR struct lcd_dev_s *dev);
- static int ssd1289_setcontrast(FAR struct lcd_dev_s *dev,
- unsigned int contrast);
- /* Initialization */
- static inline int ssd1289_hwinitialize(FAR struct ssd1289_dev_s *priv);
- /****************************************************************************
- * Private Data
- ****************************************************************************/
- /* This driver can support only a signal SSD1289 device. This is due to an
- * unfortunate decision made whent he getrun and putrun methods were
- * designed. The following is the single SSD1289 driver state instance:
- */
- static struct ssd1289_dev_s g_lcddev;
- /****************************************************************************
- * Private Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: ssd1289_putreg(lcd,
- *
- * Description:
- * Write to an LCD register
- *
- ****************************************************************************/
- static void ssd1289_putreg(FAR struct ssd1289_lcd_s *lcd,
- uint8_t regaddr, uint16_t regval)
- {
- /* Set the index register to the register address and write the register
- * contents
- */
- lcd->index(lcd, regaddr);
- lcd->write(lcd, regval);
- }
- /****************************************************************************
- * Name: ssd1289_readreg
- *
- * Description:
- * Read from an LCD register
- *
- ****************************************************************************/
- #ifndef CONFIG_LCD_NOGETRUN
- static uint16_t ssd1289_readreg(FAR struct ssd1289_lcd_s *lcd,
- uint8_t regaddr)
- {
- /* Set the index register to the register address and read the register
- * contents
- */
- lcd->index(lcd, regaddr);
- return lcd->read(lcd);
- }
- #endif
- /****************************************************************************
- * Name: ssd1289_gramselect
- *
- * Description:
- * Setup to read or write multiple pixels to the GRAM memory
- *
- ****************************************************************************/
- static inline void ssd1289_gramselect(FAR struct ssd1289_lcd_s *lcd)
- {
- lcd->index(lcd, SSD1289_DATA);
- }
- /****************************************************************************
- * Name: ssd1289_gramwrite
- *
- * Description:
- * Setup to read or write multiple pixels to the GRAM memory
- *
- ****************************************************************************/
- static inline void ssd1289_gramwrite(FAR struct ssd1289_lcd_s *lcd,
- uint16_t data)
- {
- lcd->write(lcd, data);
- }
- /****************************************************************************
- * Name: ssd1289_readsetup
- *
- * Description:
- * Prime the operation by reading one pixel from the GRAM memory if
- * necessary for this LCD type. When reading 16-bit gram data, there
- * may be some shifts in the returned data:
- *
- * - ILI932x: Discard first dummy read; no shift in the return data
- *
- ****************************************************************************/
- #ifndef CONFIG_LCD_NOGETRUN
- static inline void ssd1289_readsetup(FAR struct ssd1289_lcd_s *lcd,
- FAR uint16_t *accum)
- {
- /* Read-ahead one pixel */
- *accum = lcd->read(lcd);
- }
- #endif
- /****************************************************************************
- * Name: ssd1289_gramread
- *
- * Description:
- * Read one correctly aligned pixel from the GRAM memory.
- * Possibly shifting the data and possibly swapping red and green
- * components.
- *
- * - ILI932x: Unknown -- assuming colors are in the color order
- *
- ****************************************************************************/
- #ifndef CONFIG_LCD_NOGETRUN
- static inline uint16_t ssd1289_gramread(FAR struct ssd1289_lcd_s *lcd,
- FAR uint16_t *accum)
- {
- /* Read the value (GRAM register already selected) */
- return lcd->read(lcd);
- }
- #endif
- /****************************************************************************
- * Name: ssd1289_setcursor
- *
- * Description:
- * Set the cursor position.
- * In landscape mode, the "column" is actually the physical
- * Y position and the "row" is the physical X position.
- *
- ****************************************************************************/
- static void ssd1289_setcursor(FAR struct ssd1289_lcd_s *lcd,
- uint16_t column, uint16_t row)
- {
- #if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT)
- ssd1289_putreg(lcd, SSD1289_XADDR, column); /* 0-239 */
- ssd1289_putreg(lcd, SSD1289_YADDR, row); /* 0-319 */
- #elif defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
- ssd1289_putreg(lcd, SSD1289_XADDR, row); /* 0-239 */
- ssd1289_putreg(lcd, SSD1289_YADDR, column); /* 0-319 */
- #endif
- }
- /****************************************************************************
- * Name: ssd1289_dumprun
- *
- * Description:
- * Dump the contexts of the run buffer:
- *
- * run - The buffer in containing the run read to be dumped
- * npixels - The number of pixels to dump
- *
- ****************************************************************************/
- #if 0 /* Sometimes useful */
- static void ssd1289_dumprun(FAR const char *msg,
- FAR uint16_t *run, size_t npixels)
- {
- int i;
- int j;
- syslog(LOG_INFO, "\n%s:\n", msg);
- for (i = 0; i < npixels; i += 16)
- {
- up_putc(' ');
- syslog(LOG_INFO, " ");
- for (j = 0; j < 16; j++)
- {
- syslog(LOG_INFO, " %04x", *run++);
- }
- up_putc('\n');
- }
- }
- #endif
- /****************************************************************************
- * Name: ssd1289_showrun
- *
- * Description:
- * When LCD debug is enabled, try to reduce then amount of output data
- * generated by ssd1289_putrun and ssd1289_getrun
- *
- ****************************************************************************/
- #ifdef CONFIG_DEBUG_LCD
- static void ssd1289_showrun(FAR struct ssd1289_dev_s *priv, fb_coord_t row,
- fb_coord_t col, size_t npixels, bool put)
- {
- fb_coord_t nextrow = priv->lastrow + 1;
- /* Has anything changed
- * (other than the row is the next row in the sequence)?
- */
- if (put == priv->put && row == nextrow && col == priv->col &&
- npixels == priv->npixels)
- {
- /* No, just update the last row */
- priv->lastrow = nextrow;
- }
- else
- {
- /* Yes... then this is the end of the preceding sequence.
- * Output the last run
- * (if there were more than one run in the sequence).
- */
- if (priv->firstrow != priv->lastrow)
- {
- lcdinfo("...\n");
- lcdinfo("%s row: %d col: %d npixels: %d\n",
- priv->put ? "PUT" : "GET",
- priv->lastrow, priv->col, priv->npixels);
- }
- /* And we are starting a new sequence. Output the first run of the
- * new sequence
- */
- lcdinfo("%s row: %d col: %d npixels: %d\n",
- put ? "PUT" : "GET", row, col, npixels);
- /* And save information about the run so that we can detect
- * continuations of the sequence.
- */
- priv->put = put;
- priv->firstrow = row;
- priv->lastrow = row;
- priv->col = col;
- priv->npixels = npixels;
- }
- }
- #endif
- /****************************************************************************
- * Name: ssd1289_putrun
- *
- * Description:
- * This method can be used to write a partial raster line to the LCD:
- *
- * row - Starting row to write to (range: 0 <= row < yres)
- * col - Starting column to write to (range: 0 <= col <= xres-npixels)
- * buffer - The buffer containing the run to be written to the LCD
- * npixels - The number of pixels to write to the LCD
- * (range: 0 < npixels <= xres-col)
- *
- ****************************************************************************/
- static int ssd1289_putrun(fb_coord_t row, fb_coord_t col,
- FAR const uint8_t *buffer,
- size_t npixels)
- {
- FAR struct ssd1289_dev_s *priv = &g_lcddev;
- FAR struct ssd1289_lcd_s *lcd = priv->lcd;
- FAR const uint16_t *src = (FAR const uint16_t *)buffer;
- int i;
- /* Buffer must be provided and aligned to a 16-bit address boundary */
- ssd1289_showrun(priv, row, col, npixels, true);
- DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
- /* Select the LCD */
- lcd->select(lcd);
- /* Write the run to GRAM. */
- #ifdef CONFIG_LCD_LANDSCAPE
- /* Convert coordinates -- Here the edge away from the row of buttons on
- * the STM3240G-EVAL is used as the top.
- */
- /* Write the GRAM data, manually incrementing X */
- for (i = 0; i < npixels; i++)
- {
- /* Write the next pixel to this position */
- ssd1289_setcursor(lcd, col, row);
- ssd1289_gramselect(lcd);
- ssd1289_gramwrite(lcd, *src);
- /* Increment to the next column */
- src++;
- col++;
- }
- #elif defined(CONFIG_LCD_RLANDSCAPE)
- /* Convert coordinates -- Here the edge next to the row of buttons on
- * the STM3240G-EVAL is used as the top.
- */
- col = (SSD1289_XRES - 1) - col;
- row = (SSD1289_YRES - 1) - row;
- /* Set the cursor position */
- ssd1289_setcursor(lcd, col, row);
- /* Then write the GRAM data, auto-decrementing X */
- ssd1289_gramselect(lcd);
- for (i = 0; i < npixels; i++)
- {
- /* Write the next pixel to this position
- * (auto-decrements to the next column)
- */
- ssd1289_gramwrite(lcd, *src);
- src++;
- }
- #elif defined(CONFIG_LCD_PORTRAIT)
- /* Convert coordinates.
- * In this configuration, the top of the display is to the left
- * of the buttons (if the board is held so that the buttons are
- * at the bottom of the board).
- */
- col = (SSD1289_XRES - 1) - col;
- /* Then write the GRAM data, manually incrementing Y (which is col) */
- for (i = 0; i < npixels; i++)
- {
- /* Write the next pixel to this position */
- ssd1289_setcursor(lcd, row, col);
- ssd1289_gramselect(lcd);
- ssd1289_gramwrite(lcd, *src);
- /* Increment to the next column */
- src++;
- col--;
- }
- #else /* CONFIG_LCD_RPORTRAIT */
- /* Convert coordinates. In this configuration, the top of the display is to the right
- * of the buttons (if the board is held so that the buttons are at the bottom of the
- * board).
- */
- row = (SSD1289_YRES - 1) - row;
- /* Then write the GRAM data, manually incrementing Y (which is col) */
- for (i = 0; i < npixels; i++)
- {
- /* Write the next pixel to this position */
- ssd1289_setcursor(lcd, row, col);
- ssd1289_gramselect(lcd);
- ssd1289_gramwrite(lcd, *src);
- /* Decrement to the next column */
- src++;
- col++;
- }
- #endif
- /* De-select the LCD */
- lcd->deselect(lcd);
- return OK;
- }
- /****************************************************************************
- * Name: ssd1289_getrun
- *
- * Description:
- * This method can be used to read a partial raster line from the LCD:
- *
- * row - Starting row to read from (range: 0 <= row < yres)
- * col - Starting column to read read (range: 0 <= col <= xres-npixels)
- * buffer - The buffer in which to return the run read from the LCD
- * npixels - The number of pixels to read from the LCD
- * (range: 0 < npixels <= xres-col)
- *
- ****************************************************************************/
- static int ssd1289_getrun(fb_coord_t row, fb_coord_t col,
- FAR uint8_t *buffer,
- size_t npixels)
- {
- #ifndef CONFIG_LCD_NOGETRUN
- FAR struct ssd1289_dev_s *priv = &g_lcddev;
- FAR struct ssd1289_lcd_s *lcd = priv->lcd;
- FAR uint16_t *dest = (FAR uint16_t *)buffer;
- uint16_t accum;
- int i;
- /* Buffer must be provided and aligned to a 16-bit address boundary */
- ssd1289_showrun(priv, row, col, npixels, false);
- DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
- /* Select the LCD */
- lcd->select(lcd);
- /* Read the run from GRAM. */
- #ifdef CONFIG_LCD_LANDSCAPE
- /* Convert coordinates -- Here the edge away from the row of buttons on
- * the STM3240G-EVAL is used as the top.
- */
- for (i = 0; i < npixels; i++)
- {
- /* Read the next pixel from this position */
- ssd1289_setcursor(lcd, row, col);
- ssd1289_gramselect(lcd);
- ssd1289_readsetup(lcd, &accum);
- *dest++ = ssd1289_gramread(lcd, &accum);
- /* Increment to the next column */
- col++;
- }
- #elif defined(CONFIG_LCD_RLANDSCAPE)
- /* Convert coordinates -- Here the edge next to the row of buttons on
- * the STM3240G-EVAL is used as the top.
- */
- col = (SSD1289_XRES - 1) - col;
- row = (SSD1289_YRES - 1) - row;
- /* Set the cursor position */
- ssd1289_setcursor(lcd, col, row);
- /* Then read the GRAM data, auto-decrementing Y */
- ssd1289_gramselect(lcd);
- /* Prime the pump for unaligned read data */
- ssd1289_readsetup(lcd, &accum);
- for (i = 0; i < npixels; i++)
- {
- /* Read the next pixel from this position
- * (autoincrements to the next row)
- */
- *dest++ = ssd1289_gramread(lcd, &accum);
- }
- #elif defined(CONFIG_LCD_PORTRAIT)
- /* Convert coordinates. In this configuration, the top of the display is
- * to the left of the buttons (if the board is held so that the buttons
- * are at the bottom of the board).
- */
- col = (SSD1289_XRES - 1) - col;
- /* Then read the GRAM data, manually incrementing Y (which is col) */
- for (i = 0; i < npixels; i++)
- {
- /* Read the next pixel from this position */
- ssd1289_setcursor(lcd, row, col);
- ssd1289_gramselect(lcd);
- ssd1289_readsetup(lcd, &accum);
- *dest++ = ssd1289_gramread(lcd, &accum);
- /* Increment to the next column */
- col--;
- }
- #else /* CONFIG_LCD_RPORTRAIT */
- /* Convert coordinates. In this configuration, the top of the display is to the right
- * of the buttons (if the board is held so that the buttons are at the bottom of the
- * board).
- */
- row = (SSD1289_YRES - 1) - row;
- /* Then write the GRAM data, manually incrementing Y (which is col) */
- for (i = 0; i < npixels; i++)
- {
- /* Write the next pixel to this position */
- ssd1289_setcursor(lcd, row, col);
- ssd1289_gramselect(lcd);
- ssd1289_readsetup(lcd, &accum);
- *dest++ = ssd1289_gramread(lcd, &accum);
- /* Decrement to the next column */
- col++;
- }
- #endif
- /* De-select the LCD */
- lcd->deselect(lcd);
- return OK;
- #else
- return -ENOSYS;
- #endif
- }
- /****************************************************************************
- * Name: ssd1289_getvideoinfo
- *
- * Description:
- * Get information about the LCD video controller configuration.
- *
- ****************************************************************************/
- static int ssd1289_getvideoinfo(FAR struct lcd_dev_s *dev,
- FAR struct fb_videoinfo_s *vinfo)
- {
- DEBUGASSERT(dev && vinfo);
- lcdinfo("fmt: %d xres: %d yres: %d nplanes: 1\n",
- SSD1289_COLORFMT, SSD1289_XRES, SSD1289_YRES);
- vinfo->fmt = SSD1289_COLORFMT; /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
- vinfo->xres = SSD1289_XRES; /* Horizontal resolution in pixel columns */
- vinfo->yres = SSD1289_YRES; /* Vertical resolution in pixel rows */
- vinfo->nplanes = 1; /* Number of color planes supported */
- return OK;
- }
- /****************************************************************************
- * Name: ssd1289_getplaneinfo
- *
- * Description:
- * Get information about the configuration of each LCD color plane.
- *
- ****************************************************************************/
- static int ssd1289_getplaneinfo(FAR struct lcd_dev_s *dev,
- unsigned int planeno,
- FAR struct lcd_planeinfo_s *pinfo)
- {
- FAR struct ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
- DEBUGASSERT(dev && pinfo && planeno == 0);
- lcdinfo("planeno: %d bpp: %d\n", planeno, SSD1289_BPP);
- pinfo->putrun = ssd1289_putrun; /* Put a run into LCD memory */
- pinfo->getrun = ssd1289_getrun; /* Get a run from LCD memory */
- pinfo->buffer = (FAR uint8_t *)priv->runbuffer; /* Run scratch buffer */
- pinfo->bpp = SSD1289_BPP; /* Bits-per-pixel */
- return OK;
- }
- /****************************************************************************
- * Name: ssd1289_getpower
- *
- * Description:
- * Get the LCD panel power status
- * (0: full off - CONFIG_LCD_MAXPOWER: full on).
- * On backlit LCDs, this setting may correspond to the backlight setting.
- *
- ****************************************************************************/
- static int ssd1289_getpower(FAR struct lcd_dev_s *dev)
- {
- lcdinfo("power: %d\n", 0);
- return g_lcddev.power;
- }
- /****************************************************************************
- * Name: ssd1289_poweroff
- *
- * Description:
- * Enable/disable LCD panel power
- * (0: full off - CONFIG_LCD_MAXPOWER: full on).
- * On backlit LCDs, this setting may correspond to the backlight setting.
- *
- ****************************************************************************/
- static int ssd1289_poweroff(FAR struct ssd1289_lcd_s *lcd)
- {
- /* Set the backlight off */
- lcd->backlight(lcd, 0);
- /* Turn the display off */
- ssd1289_putreg(lcd, SSD1289_DSPCTRL, 0);
- /* Remember the power off state */
- g_lcddev.power = 0;
- return OK;
- }
- /****************************************************************************
- * Name: ssd1289_setpower
- *
- * Description:
- * Enable/disable LCD panel power
- * (0: full off - CONFIG_LCD_MAXPOWER: full on).
- * On backlit LCDs, this setting may correspond to the backlight setting.
- *
- ****************************************************************************/
- static int ssd1289_setpower(FAR struct lcd_dev_s *dev, int power)
- {
- FAR struct ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
- FAR struct ssd1289_lcd_s *lcd = priv->lcd;
- lcdinfo("power: %d\n", power);
- DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER);
- /* Set new power level */
- if (power > 0)
- {
- /* Set the backlight level */
- lcd->backlight(lcd, power);
- /* Then turn the display on:
- * D=ON(3) CM=0 DTE=1 GON=1 SPT=0 VLE=0 PT=0
- */
- ssd1289_putreg(lcd, SSD1289_DSPCTRL,
- (SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_GON |
- SSD1289_DSPCTRL_DTE | SSD1289_DSPCTRL_VLE(0)));
- g_lcddev.power = power;
- }
- else
- {
- /* Turn the display off */
- ssd1289_poweroff(lcd);
- }
- return OK;
- }
- /****************************************************************************
- * Name: ssd1289_getcontrast
- *
- * Description:
- * Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
- *
- ****************************************************************************/
- static int ssd1289_getcontrast(FAR struct lcd_dev_s *dev)
- {
- lcdinfo("Not implemented\n");
- return -ENOSYS;
- }
- /****************************************************************************
- * Name: ssd1289_setcontrast
- *
- * Description:
- * Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
- *
- ****************************************************************************/
- static int ssd1289_setcontrast(FAR struct lcd_dev_s *dev,
- unsigned int contrast)
- {
- lcdinfo("contrast: %d\n", contrast);
- return -ENOSYS;
- }
- /****************************************************************************
- * Name: ssd1289_hwinitialize
- *
- * Description:
- * Initialize the LCD hardware.
- *
- ****************************************************************************/
- static inline int ssd1289_hwinitialize(FAR struct ssd1289_dev_s *priv)
- {
- FAR struct ssd1289_lcd_s *lcd = priv->lcd;
- #ifndef CONFIG_LCD_NOGETRUN
- uint16_t id;
- #endif
- int ret;
- /* Select the LCD */
- lcd->select(lcd);
- /* Read the device ID. Skip verification of the device ID is the LCD is
- * write-only. What choice do we have?
- */
- #ifndef CONFIG_LCD_NOGETRUN
- id = ssd1289_readreg(lcd, SSD1289_DEVCODE);
- if (id != 0)
- {
- lcdinfo("LCD ID: %04x\n", id);
- }
- /* If we could not get the ID, then let's just assume that this is an
- * SSD1289. Perhaps we have some early register access issues.
- * This seems to happen.
- * But then perhaps we should not even bother to read the device ID at all?
- */
- else
- {
- lcdwarn("WARNING: No LCD ID, assuming SSD1289\n");
- id = SSD1289_DEVCODE_VALUE;
- }
- /* Check if the ID is for the SSD1289 */
- if (id == SSD1289_DEVCODE_VALUE)
- #endif
- {
- /* LCD controller configuration.
- * Many details of the controller initialization must, unfortunately,
- * vary from LCD to LCD. I have looked at the spec and at three
- * different drivers for LCDs that have SSD1289 controllers. I have
- * tried to summarize these differences as profiles (defined above).
- * Some other alternatives are noted below.
- *
- * Most of the differences between LCDs are nothing more than a few
- * minor bit settings. The most significant difference between LCD
- * drivers in is the manner in which the LCD is powered up and in how
- * the power controls are set.
- * My suggestion is that if you have working LCD initialization code,
- * you should simply replace the following guesses with your working
- * code.
- */
- /* Most drivers just enable the oscillator */
- #ifdef SSD1289_USE_SIMPLE_INIT
- ssd1289_putreg(lcd, SSD1289_OSCSTART, SSD1289_OSCSTART_OSCEN);
- #else
- /* But one goes through a more complex start-up sequence.
- * Something like the following:
- *
- * First, put the display in INTERNAL operation:
- * D=INTERNAL(1) CM=0 DTE=0 GON=1 SPT=0 VLE=0 PT=0
- */
- ssd1289_putreg(lcd, SSD1289_DSPCTRL,
- (SSD1289_DSPCTRL_INTERNAL | SSD1289_DSPCTRL_GON |
- SSD1289_DSPCTRL_VLE(0)));
- /* Then enable the oscillator */
- ssd1289_putreg(lcd, SSD1289_OSCSTART, SSD1289_OSCSTART_OSCEN);
- /* Turn the display on:
- * D=ON(3) CM=0 DTE=0 GON=1 SPT=0 VLE=0 PT=0
- */
- ssd1289_putreg(lcd, SSD1289_DSPCTRL,
- (SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_GON |
- SSD1289_DSPCTRL_VLE(0)));
- /* Take the LCD out of sleep mode */
- ssd1289_putreg(lcd, SSD1289_SLEEP, 0);
- up_mdelay(30);
- /* Turn the display on:
- * D=INTERNAL(1) CM=0 DTE=1 GON=1 SPT=0 VLE=0 PT=0
- */
- ssd1289_putreg(lcd, SSD1289_DSPCTRL,
- (SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_DTE |
- SSD1289_DSPCTRL_GON | SSD1289_DSPCTRL_VLE(0)));
- #endif
- /* Set up power control registers. There is a lot of variability
- * from LCD-to-LCD in how the power registers are configured.
- */
- ssd1289_putreg(lcd, SSD1289_PWRCTRL1, PWRCTRL1_SETTING);
- ssd1289_putreg(lcd, SSD1289_PWRCTRL2, PWRCTRL2_SETTING);
- /* One driver adds a delay here.. I doubt that this is really
- * necessary.
- */
- /* up_mdelay(15); */
- ssd1289_putreg(lcd, SSD1289_PWRCTRL3, PWRCTRL3_SETTING);
- ssd1289_putreg(lcd, SSD1289_PWRCTRL4, PWRCTRL4_SETTING);
- ssd1289_putreg(lcd, SSD1289_PWRCTRL5, PWRCTRL5_SETTING);
- /* One driver does an odd setting of the driver output control.
- * No idea why.
- */
- #if 0
- ssd1289_putreg(lcd, SSD1289_OUTCTRL,
- (SSD1289_OUTCTRL_MUX(12) | SSD1289_OUTCTRL_TB |
- SSD1289_OUTCTRL_BGR | SSD1289_OUTCTRL_CAD));
- /* The same driver does another small delay here */
- up_mdelay(15);
- #endif
- /* After this point, the drivers differ only in some varying register
- * bit settings.
- */
- /* Set the driver output control.
- * PORTRAIT MODES:
- * MUX=319, TB=1, SM=0, BGR=1, CAD=0, REV=1, RL=0
- * LANDSCAPE MODES:
- * MUX=319, TB=0, SM=0, BGR=1, CAD=0, REV=1, RL=0
- */
- #if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT)
- ssd1289_putreg(lcd, SSD1289_OUTCTRL,
- (SSD1289_OUTCTRL_MUX(319) | SSD1289_OUTCTRL_TB |
- SSD1289_OUTCTRL_BGR | SSD1289_OUTCTRL_REV));
- #else
- ssd1289_putreg(lcd, SSD1289_OUTCTRL,
- (SSD1289_OUTCTRL_MUX(319) | SSD1289_OUTCTRL_BGR |
- SSD1289_OUTCTRL_REV));
- #endif
- /* Set the LCD driving AC waveform
- * NW=0, WSMD=0, EOR=1, BC=1, ENWD=0, FLD=0
- */
- ssd1289_putreg(lcd, SSD1289_ACCTRL,
- (SSD1289_ACCTRL_EOR | SSD1289_ACCTRL_BC));
- /* Take the LCD out of sleep mode (isn't this redundant in the
- * non-simple case?)
- */
- ssd1289_putreg(lcd, SSD1289_SLEEP, 0);
- /* Set entry mode */
- #if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT)
- /* LG=0, AM=0, ID=3, TY=2, DMODE=0, WMODE=0, OEDEF=0, TRANS=0, DRM=3
- * Alternative TY=2 (But TY only applies in 262K color mode anyway)
- */
- ssd1289_putreg(lcd, SSD1289_ENTRY,
- (SSD1289_ENTRY_ID_HINCVINC | SSD1289_ENTRY_TY_C |
- SSD1289_ENTRY_DMODE_RAM | SSD1289_ENTRY_DFM_65K));
- #else
- /* LG=0, AM=1, ID=3, TY=2, DMODE=0, WMODE=0, OEDEF=0, TRANS=0, DRM=3 */
- /* Alternative TY=2 (But TY only applies in 262K color mode anyway) */
- ssd1289_putreg(lcd, SSD1289_ENTRY,
- (SSD1289_ENTRY_AM | SSD1289_ENTRY_ID_HINCVINC |
- SSD1289_ENTRY_TY_C | SSD1289_ENTRY_DMODE_RAM |
- SSD1289_ENTRY_DFM_65K));
- #endif
- /* Clear compare registers */
- ssd1289_putreg(lcd, SSD1289_CMP1, 0);
- ssd1289_putreg(lcd, SSD1289_CMP2, 0);
- /* One driver puts a huge, 100 millisecond delay here */
- /* up_mdelay(100); */
- /* Set Horizontal and vertical porch.
- * Horizontal porch: 239 pixels per line, delay=28
- * Vertical porch: VBP=3, XFP=0
- */
- ssd1289_putreg(lcd, SSD1289_HPORCH,
- (28 << SSD1289_HPORCH_HBP_SHIFT) |
- (239 << SSD1289_HPORCH_XL_SHIFT));
- ssd1289_putreg(lcd, SSD1289_VPORCH,
- (3 << SSD1289_VPORCH_VBP_SHIFT) |
- (0 << SSD1289_VPORCH_XFP_SHIFT));
- /* Set display control.
- * D=ON(3), CM=0 (not 8-color), DTE=1, GON=1, SPT=0, VLE=1 PT=0
- */
- ssd1289_putreg(lcd, SSD1289_DSPCTRL,
- (SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_DTE |
- SSD1289_DSPCTRL_GON | SSD1289_DSPCTRL_VLE(1)));
- /* Frame cycle control. Alternative: SSD1289_FCYCCTRL_DIV8 */
- ssd1289_putreg(lcd, SSD1289_FCYCCTRL, 0);
- /* Gate scan start position = 0 */
- ssd1289_putreg(lcd, SSD1289_GSTART, 0);
- /* Clear vertical scrolling */
- ssd1289_putreg(lcd, SSD1289_VSCROLL1, 0);
- ssd1289_putreg(lcd, SSD1289_VSCROLL2, 0);
- /* Setup window 1 (0-319) */
- ssd1289_putreg(lcd, SSD1289_W1START, 0);
- ssd1289_putreg(lcd, SSD1289_W1END, 319);
- /* Disable window 2 (0-0) */
- ssd1289_putreg(lcd, SSD1289_W2START, 0);
- ssd1289_putreg(lcd, SSD1289_W2END, 0);
- /* Horizontal start and end (0-239) */
- ssd1289_putreg(lcd, SSD1289_HADDR,
- (0 << SSD1289_HADDR_HSA_SHIFT) |
- (239 << SSD1289_HADDR_HEA_SHIFT));
- /* Vertical start and end (0-319) */
- ssd1289_putreg(lcd, SSD1289_VSTART, 0);
- ssd1289_putreg(lcd, SSD1289_VEND, 319);
- /* Gamma controls */
- ssd1289_putreg(lcd, SSD1289_GAMMA1, 0x0707);
- ssd1289_putreg(lcd, SSD1289_GAMMA2, 0x0204); /* Alternative: 0x0704 */
- ssd1289_putreg(lcd, SSD1289_GAMMA3, 0x0204);
- ssd1289_putreg(lcd, SSD1289_GAMMA4, 0x0502);
- ssd1289_putreg(lcd, SSD1289_GAMMA5, 0x0507);
- ssd1289_putreg(lcd, SSD1289_GAMMA6, 0x0204);
- ssd1289_putreg(lcd, SSD1289_GAMMA7, 0x0204);
- ssd1289_putreg(lcd, SSD1289_GAMMA8, 0x0502);
- ssd1289_putreg(lcd, SSD1289_GAMMA9, 0x0302);
- ssd1289_putreg(lcd, SSD1289_GAMMA10, 0x0302); /* Alternative: 0x1f00 */
- /* Clear write mask */
- ssd1289_putreg(lcd, SSD1289_WRMASK1, 0);
- ssd1289_putreg(lcd, SSD1289_WRMASK2, 0);
- /* Set frame frequency = 65Hz (This should not be necessary since this
- * is the default POR value)
- */
- ssd1289_putreg(lcd, SSD1289_FFREQ, SSD1289_FFREQ_OSC_FF65);
- /* Set the cursor at the home position and set the index register to
- * the gram data register (I can't imagine these are necessary).
- */
- ssd1289_setcursor(lcd, 0, 0);
- ssd1289_gramselect(lcd);
- /* One driver has a 50 msec delay here */
- /* up_mdelay(50); */
- ret = OK;
- }
- #ifndef CONFIG_LCD_NOGETRUN
- else
- {
- lcderr("ERROR: Unsupported LCD type\n");
- ret = -ENODEV;
- }
- #endif
- /* De-select the LCD */
- lcd->deselect(lcd);
- return ret;
- }
- /****************************************************************************
- * Public Functions
- ****************************************************************************/
- /****************************************************************************
- * Name: ssd1289_lcdinitialize
- *
- * Description:
- * Initialize the LCD video hardware.
- * The initial state of the LCD is fully initialized, display memory
- * cleared, and the LCD ready to use, but with the power setting at 0
- * (full off).
- *
- ****************************************************************************/
- FAR struct lcd_dev_s *ssd1289_lcdinitialize(FAR struct ssd1289_lcd_s *lcd)
- {
- int ret;
- lcdinfo("Initializing\n");
- /* If we ccould support multiple SSD1289 devices, this is where we would
- * allocate a new driver data structure... but we can't.
- * Why not? Because of a bad should the form of the getrun() and
- * putrun methods.
- */
- FAR struct ssd1289_dev_s *priv = &g_lcddev;
- /* Initialize the driver data structure */
- priv->dev.getvideoinfo = ssd1289_getvideoinfo;
- priv->dev.getplaneinfo = ssd1289_getplaneinfo;
- priv->dev.getpower = ssd1289_getpower;
- priv->dev.setpower = ssd1289_setpower;
- priv->dev.getcontrast = ssd1289_getcontrast;
- priv->dev.setcontrast = ssd1289_setcontrast;
- priv->lcd = lcd;
- /* Configure and enable LCD */
- ret = ssd1289_hwinitialize(priv);
- if (ret == OK)
- {
- /* Clear the display (setting it to the color 0=black) */
- ssd1289_clear(&priv->dev, 0);
- /* Turn the display off */
- ssd1289_poweroff(lcd);
- return &g_lcddev.dev;
- }
- return NULL;
- }
- /****************************************************************************
- * Name: ssd1289_clear
- *
- * Description:
- * This is a non-standard LCD interface just for the stm3240g-EVAL board.
- * Because of the various rotations, clearing the display in the normal way
- * by writing a sequences of runs that covers the entire display can be
- * very slow. Here the display is cleared by simply setting all GRAM
- * memory to the specified color.
- *
- ****************************************************************************/
- void ssd1289_clear(FAR struct lcd_dev_s *dev, uint16_t color)
- {
- FAR struct ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
- FAR struct ssd1289_lcd_s *lcd = priv->lcd;
- uint32_t i;
- /* Select the LCD and home the cursor position */
- lcd->select(lcd);
- ssd1289_setcursor(lcd, 0, 0);
- /* Prepare to write GRAM data */
- ssd1289_gramselect(lcd);
- /* Copy color into all of GRAM.
- * Orientation does not matter in this case.
- */
- for (i = 0; i < SSD1289_XRES * SSD1289_YRES; i++)
- {
- ssd1289_gramwrite(lcd, color);
- }
- /* De-select the LCD */
- lcd->deselect(lcd);
- }
- #endif /* CONFIG_LCD_SSD1289 */
|