/************************************************************************************** * drivers/lcd/ssd1289.c * * 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 proably ahve to * customize for any particular LCD hardware. * * Copyright (C) 2012 Gregory Nutt. All rights reserved. * Authors: Gregory Nutt * * References: SSD1289, Rev 1.3, Apr 2007, Solomon Systech Limited * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * **************************************************************************************/ /************************************************************************************** * Included Files **************************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #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 /* Define CONFIG_DEBUG_LCD to enable detailed LCD debug output. Verbose debug must * also be enabled. */ #ifndef CONFIG_DEBUG # undef CONFIG_DEBUG_VERBOSE # undef CONFIG_DEBUG_GRAPHICS # undef CONFIG_DEBUG_LCD #endif #ifndef CONFIG_DEBUG_VERBOSE # undef CONFIG_DEBUG_LCD #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 /* Debug ******************************************************************************/ #ifdef CONFIG_DEBUG_LCD # define lcddbg dbg # define lcdvdbg vdbg #else # define lcddbg(x...) # define lcdvdbg(x...) #endif /************************************************************************************** * Private Type Definition **************************************************************************************/ /* This structure describes the state of this driver */ struct ssd1289_dev_s { /* Publically 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 */ /* 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_SSD1289_WRONLY 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_SSD1289_WRONLY 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 */ 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 void 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_SSD1289_WRONLY 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_SSD1289_WRONLY 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_SSD1289_WRONLY 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, j; lib_rawprintf("\n%s:\n", msg); for (i = 0; i < npixels; i += 16) { up_putc(' '); lib_rawprintf(" "); for (j = 0; j < 16; j++) { lib_rawprintf(" %04x", *run++); } up_putc('\n'); } } #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 */ lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels); 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 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 botton 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 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 botton 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 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_SSD1289_WRONLY 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 */ lcdvdbg("row: %d col: %d npixels: %d\n", row, col, npixels); 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 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 botton 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 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 botton 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 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); lcdvdbg("fmt: %d xres: %d yres: %d nplanes: 1\n", SSD1289_COLORFMT, SSD1289_XRES, SSD1289_XRES); 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); lcdvdbg("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 = (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) { lcdvdbg("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; lcdvdbg("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=0 GON=1 SPT=0 VLE=0 PT=0 */ ssd1289_putreg(lcd, SSD1289_DSPCTRL, (SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_GON | 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) { lcdvdbg("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) { lcdvdbg("contrast: %d\n", contrast); return -ENOSYS; } /************************************************************************************** * Name: ssd1289_hwinitialize * * Description: * Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST). * **************************************************************************************/ static inline void ssd1289_hwinitialize(FAR struct ssd1289_dev_s *priv) { FAR struct ssd1289_lcd_s *lcd = priv->lcd; #ifndef CONFIG_SSD1289_WRONLY uint16_t id; #endif /* Select the LCD and home the cursor position */ lcd->select(lcd); #ifndef CONFIG_SSD1289_WRONLY id = ssd1289_readreg(lcd, SSD1289_DEVCODE); lcddbg("LCD ID: %04x\n", id); /* 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 alternatives in the comments. * * Most of the differences between LCDs are nothing more than a few minor bit * settings. The most significant difference betwen LCD drivers in is the * manner in which the LCD is powered up and in how the power controls are set. */ /* Most drivers just enable the oscillator */ #if 1 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 | define 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. * * PWRCTRL1: * AP=medium-to-large, DC=Fosc/4, BT=+5/-4, DCT=Fosc/4 * Alternatives: * AP=Large-to-maximum, DC=Fosc/4, BT=+5/-4, DCT=Fosc/4 * AP=small-to-medium, DC=Flinex24, BT=+5/-4, DCT=Flinxx24 * PWRCTRL2: * SSD1289_PWRCTRL2_VRC_5p1V * Alternatives * SSD1289_PWRCTRL2_VRC_5p3V * PWRCTRL3: * SSD1289_PWRCTRL3_VRH_x2p335 * Alternatives: * SSD1289_PWRCTRL3_VRH_x2p165 * SSD1289_PWRCTRL3_VRH_x2p500 * NOTE: Many have bit 8 set which is not defined in the SSD1289 spec. * PWRCTRL4: * VDV=11, VCOMG=1 * Alternatives: * VDV=9 * VDV=13 * PWRCTRL5: * VCM=56, NOTP=1 * Alternatives: * VCM=60 */ ssd1289_putreg(lcd, SSD1289_PWRCTRL1, (SSD1289_PWRCTRL1_AP_MEDLG | SSD1289_PWRCTRL1_DC_FOSd4 | SSD1289_PWRCTRL1_BT_p5m4 | SSD1289_PWRCTRL1_DCT_FOSd4)); ssd1289_putreg(lcd, SSD1289_PWRCTRL2, SSD1289_PWRCTRL2_VRC_5p1V); /* One driver adds a delay here.. I doubt that this is really necessary. * Alternative: No delay */ #if 1 up_mdelay(15); #endif ssd1289_putreg(lcd, SSD1289_PWRCTRL3, SSD1289_PWRCTRL3_VRH_x2p335); ssd1289_putreg(lcd, SSD1289_PWRCTRL4, (SSD1289_PWRCTRL4_VDV(11) | SSD1289_PWRCTRL4_VCOMG)); ssd1289_putreg(lcd, SSD1289_PWRCTRL5, (SSD1289_PWRCTRL5_VCM(56) | SSD1289_PWRCTRL5_NOTP)); /* One driver does an odd setting of the 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)); #endif /* The same driver does another small delay here */ #if 1 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 */ 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) */ ssd1289_putreg(lcd, SSD1289_ENTRY, (SSD1289_ENTRY_ID_HINCVINC | SSD1289_ENTRY_TY_B | 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) */ ssd1289_putreg(lcd, SSD1289_ENTRY, (SSD1289_ENTRY_AM | SSD1289_ENTRY_ID_HINCVINC | SSD1289_ENTRY_TY_B | SSD1289_ENTRY_DMODE_RAM | SSD1289_ENTRY_DFM_65K)); #endif /* Clear compare registers */ ssd1289_putreg(lcd, SSD1289_CMP1, 0); ssd1289_putreg(lcd, SSD1289_CMP2, 0); 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 | define 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 */ #if 0 up_mdelay(50); #endif } else { lcddbg("Unsupported LCD type\n"); } /* De-select the LCD */ lcd->deselect(lcd); } /************************************************************************************* * 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) { lcdvdbg("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 */ ssd1289_hwinitialize(priv); /* 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; } /************************************************************************************** * 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 */