/**************************************************************************** * drivers/lcd/mio283qt9a.c * * Copyright (C) 2012, 2014 Gregory Nutt. All rights reserved. * Authors: Gregory Nutt * Tobias Duckworth * * 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 #ifdef CONFIG_LCD_MIO283QT9A /**************************************************************************** * 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 MIO283QT9A_XRES 320 # define MIO283QT9A_YRES 240 #else # define MIO283QT9A_XRES 240 # define MIO283QT9A_YRES 320 #endif /* Color depth and format */ #define MIO283QT9A_BPP 16 #define MIO283QT9A_COLORFMT FB_FMT_RGB16_565 /* Hardware LCD/LCD controller definitions **********************************/ /* In this driver, I chose to use all literal constants for register address * and values. Some recent experiences have shown me that during LCD bringup, * it is more important to know the binary values rather than nice, people * friendly names. Sad, but true. */ #define ILI9341_ID_1 0x93 #define ILI9341_ID_2 0x41 /**************************************************************************** * Private Type Definition ****************************************************************************/ /* This structure describes the state of this driver */ struct mio283qt9a_dev_s { /* Publicly visible device structure */ struct lcd_dev_s dev; /* Private LCD-specific information follows */ FAR struct mio283qt9a_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[MIO283QT9A_XRES]; }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Low Level LCD access */ static void mio283qt9a_putreg(FAR struct mio283qt9a_lcd_s *lcd, uint8_t regaddr, uint16_t regval); #ifndef CONFIG_LCD_NOGETRUN static uint16_t mio283qt9a_readreg(FAR struct mio283qt9a_lcd_s *lcd, uint8_t regaddr); #endif static inline void mio283qt9a_gramwrite(FAR struct mio283qt9a_lcd_s *lcd, uint16_t rgbcolor); #ifndef CONFIG_LCD_NOGETRUN static inline void mio283qt9a_readsetup(FAR struct mio283qt9a_lcd_s *lcd, FAR uint16_t *accum); static inline uint16_t mio283qt9a_gramread(FAR struct mio283qt9a_lcd_s *lcd, FAR uint16_t *accum); #endif static void mio283qt9a_setarea(FAR struct mio283qt9a_lcd_s *lcd, uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1); /* LCD Data Transfer Methods */ static int mio283qt9a_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels); static int mio283qt9a_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels); /* LCD Configuration */ static int mio283qt9a_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo); static int mio283qt9a_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 mio283qt9a_getpower(FAR struct lcd_dev_s *dev); static int mio283qt9a_setpower(FAR struct lcd_dev_s *dev, int power); static int mio283qt9a_getcontrast(FAR struct lcd_dev_s *dev); static int mio283qt9a_setcontrast(FAR struct lcd_dev_s *dev, unsigned int contrast); /* Initialization */ static inline int mio283qt9a_hwinitialize( FAR struct mio283qt9a_dev_s *priv); /**************************************************************************** * Private Data ****************************************************************************/ /* This driver can support only a signal MIO283QT9A device. * This is due to an unfortunate decision made when the getrun and putrun * methods were designed. * The following is the single MIO283QT9A driver state instance: */ static struct mio283qt9a_dev_s g_lcddev; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: mio283qt9a_putreg * * Description: * Write to an LCD register * ****************************************************************************/ static void mio283qt9a_putreg(FAR struct mio283qt9a_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: mio283qt9a_readreg * * Description: * Read from an LCD register * ****************************************************************************/ #ifndef CONFIG_LCD_NOGETRUN static uint16_t mio283qt9a_readreg(FAR struct mio283qt9a_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: mio283qt9a_gramselect_write * * Description: * Setup to write multiple pixels to the GRAM memory * ****************************************************************************/ static inline void mio283qt9a_gramselect_write( FAR struct mio283qt9a_lcd_s *lcd) { lcd->index(lcd, 0x2c); } /**************************************************************************** * Name: mio283qt9a_gramselect_read * * Description: * Setup to read multiple pixels to the GRAM memory * ****************************************************************************/ static inline void mio283qt9a_gramselect_read( FAR struct mio283qt9a_lcd_s *lcd) { lcd->index(lcd, 0x2e); lcd->readgram(lcd); } /**************************************************************************** * Name: mio283qt9a_gramwrite * * Description: * Setup to read or write multiple pixels to the GRAM memory * ****************************************************************************/ static inline void mio283qt9a_gramwrite( FAR struct mio283qt9a_lcd_s *lcd, uint16_t data) { lcd->write(lcd, data); } /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_readsetup(FAR struct mio283qt9a_lcd_s *lcd, FAR uint16_t *accum) { #if 0 /* Probably not necessary... untested */ /* Read-ahead one pixel */ *accum = lcd->read(lcd); #endif } #endif /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_gramread(FAR struct mio283qt9a_lcd_s *lcd, FAR uint16_t *accum) { /* Read the value (GRAM register already selected) */ return lcd->readgram(lcd); } #endif /**************************************************************************** * Name: mio283qt9a_setarea * * 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 mio283qt9a_setarea(FAR struct mio283qt9a_lcd_s *lcd, uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1) { mio283qt9a_putreg(lcd, 0x2a, (x0 >> 8)); /* Set column address x0 */ lcd->write(lcd, (x0 & 0xff)); /* Set x0 */ lcd->write(lcd, (x1 >> 8)); /* Set x1 */ lcd->write(lcd, (x1 & 0xff)); /* Set x1 */ mio283qt9a_putreg(lcd, 0x2b, (y0 >> 8)); /* Set page address y0 */ lcd->write(lcd, (y0 & 0xff)); /* Set y0 */ lcd->write(lcd, (y1 >> 8)); /* Set y1 */ lcd->write(lcd, (y1 & 0xff)); /* Set y1 */ } /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_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: mio283qt9a_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 mio283qt9a_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels) { FAR struct mio283qt9a_dev_s *priv = &g_lcddev; FAR struct mio283qt9a_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 */ DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0); /* Select the LCD */ lcd->select(lcd); /* Write the run to GRAM. */ mio283qt9a_setarea(lcd, col, row, col + npixels - 1, row); mio283qt9a_gramselect_write(lcd); for (i = 0; i < npixels; i++) { mio283qt9a_gramwrite(lcd, *src); src++; } /* De-select the LCD */ lcd->deselect(lcd); return OK; } /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels) { #ifndef CONFIG_LCD_NOGETRUN FAR struct mio283qt9a_dev_s *priv = &g_lcddev; FAR struct mio283qt9a_lcd_s *lcd = priv->lcd; FAR uint16_t *dest = (FAR uint16_t *)buffer; uint16_t accum, test; int i; /* Buffer must be provided and aligned to a 16-bit address boundary */ lcdinfo("mio283qt9a_getrun row: %d col: %d npixels: %d\n", row, col, npixels); DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0); /* Read the run from GRAM. */ /* Select the LCD */ lcd->select(lcd); /* Red the run fram GRAM. */ mio283qt9a_setarea(lcd, col, row, col + npixels - 1, row); mio283qt9a_gramselect_read(lcd); /* Prime the pump for unaligned read data */ mio283qt9a_readsetup(lcd, &accum); for (i = 0; i < npixels; i++) { test = mio283qt9a_gramread(lcd, &accum); *dest++ = test; } /* De-select the LCD */ lcd->deselect(lcd); return OK; #else return -ENOSYS; #endif } /**************************************************************************** * Name: mio283qt9a_getvideoinfo * * Description: * Get information about the LCD video controller configuration. * ****************************************************************************/ static int mio283qt9a_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", MIO283QT9A_COLORFMT, MIO283QT9A_XRES, MIO283QT9A_YRES); vinfo->fmt = MIO283QT9A_COLORFMT; /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */ vinfo->xres = MIO283QT9A_XRES; /* Horizontal resolution in pixel columns */ vinfo->yres = MIO283QT9A_YRES; /* Vertical resolution in pixel rows */ vinfo->nplanes = 1; /* Number of color planes supported */ return OK; } /**************************************************************************** * Name: mio283qt9a_getplaneinfo * * Description: * Get information about the configuration of each LCD color plane. * ****************************************************************************/ static int mio283qt9a_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno, FAR struct lcd_planeinfo_s *pinfo) { FAR struct mio283qt9a_dev_s *priv = (FAR struct mio283qt9a_dev_s *)dev; DEBUGASSERT(dev && pinfo && planeno == 0); lcdinfo("planeno: %d bpp: %d\n", planeno, MIO283QT9A_BPP); pinfo->putrun = mio283qt9a_putrun; /* Put a run into LCD memory */ pinfo->getrun = mio283qt9a_getrun; /* Get a run from LCD memory */ pinfo->buffer = (FAR uint8_t *)priv->runbuffer; /* Run scratch buffer */ pinfo->bpp = MIO283QT9A_BPP; /* Bits-per-pixel */ return OK; } /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_getpower(FAR struct lcd_dev_s *dev) { lcdinfo("getpower: %d\n", 0); return g_lcddev.power; } /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_poweroff(FAR struct mio283qt9a_lcd_s *lcd) { /* Select the LCD */ lcdinfo("mio283qt9a_poweroff\n"); lcd->select(lcd); /* Set the backlight off */ lcd->backlight(lcd, 0); /* Turn the display off */ mio283qt9a_putreg(lcd, 0x28, 0x0000); /* GON=0, DTE=0, D=0 */ /* Deselect the LCD */ lcd->deselect(lcd); /* Remember the power off state */ g_lcddev.power = 0; return OK; } /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_setpower(FAR struct lcd_dev_s *dev, int power) { FAR struct mio283qt9a_dev_s *priv = (FAR struct mio283qt9a_dev_s *)dev; FAR struct mio283qt9a_lcd_s *lcd = priv->lcd; lcdinfo("setpower: %d\n", power); DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER); /* Set new power level */ if (power > 0) { /* Select the LCD */ lcd->select(lcd); /* Set the backlight level */ lcd->backlight(lcd, power); /* Then turn the display on: */ mio283qt9a_putreg(lcd, 0x29, 0x00); /* GON=1, DTE=1, D=2 */ /* Deselect the LCD */ lcd->deselect(lcd); /* Remember the power on state */ g_lcddev.power = power; } else { /* Turn the display off */ mio283qt9a_poweroff(lcd); } return OK; } /**************************************************************************** * Name: mio283qt9a_getcontrast * * Description: * Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST). * ****************************************************************************/ static int mio283qt9a_getcontrast(FAR struct lcd_dev_s *dev) { lcdinfo("Not implemented\n"); return -ENOSYS; } /**************************************************************************** * Name: mio283qt9a_setcontrast * * Description: * Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST). * ****************************************************************************/ static int mio283qt9a_setcontrast(FAR struct lcd_dev_s *dev, unsigned int contrast) { lcdinfo("contrast: %d\n", contrast); return -ENOSYS; } /**************************************************************************** * Name: mio283qt9a_hwinitialize * * Description: * Initialize the LCD hardware. * ****************************************************************************/ static inline int mio283qt9a_hwinitialize(FAR struct mio283qt9a_dev_s *priv) { FAR struct mio283qt9a_lcd_s *lcd = priv->lcd; #if !defined(CONFIG_LCD_NOGETRUN) || defined(CONFIG_DEBUG_LCD) uint16_t id_a; uint16_t id_b; uint16_t id_c; uint16_t id_d; #endif #ifdef CONFIG_DEBUG_LCD uint16_t id_e; #endif int ret; /* Select the LCD */ lcd->select(lcd); /* Read the HIMAX ID registger (0x00) */ #ifndef CONFIG_LCD_NOGETRUN id_a = mio283qt9a_readreg(lcd, 0xd3); id_b = lcd->read(lcd); id_c = lcd->read(lcd); id_d = lcd->read(lcd); lcdinfo("LCD ID: %04x %04x %04x %04x\n", id_a, id_b, id_c, id_d); UNUSED(id_a); UNUSED(id_b); /* Check if the ID is for the ILI9341 */ if (id_c == ILI9341_ID_1 && id_d == ILI9341_ID_2) #endif { mio283qt9a_putreg(lcd, 0x29, 0); /* Power on */ mio283qt9a_putreg(lcd, 0x13, 0); /* Normal display on */ mio283qt9a_putreg(lcd, 0xc0, 0x28); /* Power control C1 */ mio283qt9a_putreg(lcd, 0xc1, 0x01); /* Power control C2 BT = 1 */ mio283qt9a_putreg(lcd, 0xc5, 0x24); /* VCOM control, VMH = 3.6v */ lcd->write(lcd, 0x25); /* VML = -1.575v */ mio283qt9a_putreg(lcd, 0x26, 0x01); /* Gamma 2.2 */ mio283qt9a_putreg(lcd, 0x3a, 0x55); /* Pixel format set command */ #if defined(CONFIG_LCD_LANDSCAPE) mio283qt9a_putreg(lcd, 0x36, 0x0028); /* MY=1, MX=0, MV=1, ML=0, BGR=1 */ #elif defined(CONFIG_LCD_PORTRAIT) mio283qt9a_putreg(lcd, 0x36, 0x0008); /* MY=0, MX=0, MV=0, ML=0, BGR=1 */ #elif defined(CONFIG_LCD_RLANDSCAPE) mio283qt9a_putreg(lcd, 0x36, 0x0068); /* MY=0, MX=1, MV=1, ML=0, BGR=1 */ #elif defined(CONFIG_LCD_RPORTRAIT) mio283qt9a_putreg(lcd, 0x36, 0x00c8); /* MY=1, MX=0, MV=1, ML=0, BGR=1 */ #endif /* Window setting */ mio283qt9a_setarea(lcd, 0, 0, (MIO283QT9A_XRES - 1), (MIO283QT9A_YRES - 1)); mio283qt9a_putreg(lcd, 0x11, 0); /* Sleep out mode */ up_mdelay(25); #ifdef CONFIG_DEBUG_LCD /* Read back some info from the panel */ id_a = mio283qt9a_readreg(lcd, 0x04); /* Read display information */ id_b = lcd->read(lcd); id_c = lcd->read(lcd); id_d = lcd->read(lcd); lcdinfo("LCD man ID: %02x, version: %02x, driver ID: %02x\n", id_b, id_c, id_d); id_a = mio283qt9a_readreg(lcd, 0x09); /* Read display status */ id_b = lcd->read(lcd); id_c = lcd->read(lcd); id_d = lcd->read(lcd); id_e = lcd->read(lcd); lcdinfo("Display status %02x, %02x, %02x, %02x, %02x\n", id_a, id_b, id_c, id_d, id_e); id_a = mio283qt9a_readreg(lcd, 0x0a); /* Read power status */ id_b = lcd->read(lcd); lcdinfo("Power status %02x, %02x\n", id_a, id_b); id_a = mio283qt9a_readreg(lcd, 0x0b); /* Read MADCTL */ id_b = lcd->read(lcd); lcdinfo("MADCTL %02x, %02x\n", id_a, id_b); id_a = mio283qt9a_readreg(lcd, 0x0c); /* Read pixel format */ id_b = lcd->read(lcd); lcdinfo("Pixel format %02x, %02x\n", id_a, id_b); id_a = mio283qt9a_readreg(lcd, 0x0d); /* Read image format */ id_b = lcd->read(lcd); lcdinfo("Image format %02x, %02x\n", id_a, id_b); id_a = mio283qt9a_readreg(lcd, 0x0e); /* read signal mode */ id_b = lcd->read(lcd); lcdinfo("Signal mode %02x, %02x\n", id_a, id_b); id_a = mio283qt9a_readreg(lcd, 0x0f); /* read self diag */ id_b = lcd->read(lcd); lcdinfo("Self diag %02x, %02x\n", id_a, id_b); #endif 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: mio283qt9a_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 *mio283qt9a_lcdinitialize( FAR struct mio283qt9a_lcd_s *lcd) { FAR struct mio283qt9a_dev_s *priv; int ret; lcdinfo("Initializing\n"); /* If we could support multiple MIO283QT9A 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. */ priv = &g_lcddev; /* Initialize the driver data structure */ priv->dev.getvideoinfo = mio283qt9a_getvideoinfo; priv->dev.getplaneinfo = mio283qt9a_getplaneinfo; priv->dev.getpower = mio283qt9a_getpower; priv->dev.setpower = mio283qt9a_setpower; priv->dev.getcontrast = mio283qt9a_getcontrast; priv->dev.setcontrast = mio283qt9a_setcontrast; priv->lcd = lcd; /* Configure and enable LCD */ ret = mio283qt9a_hwinitialize(priv); if (ret == OK) { /* Clear the display (setting it to the color 0=black) */ mio283qt9a_clear(&priv->dev, 0x0000); /* Turn the display off */ mio283qt9a_poweroff(lcd); return &g_lcddev.dev; } return NULL; } /**************************************************************************** * Name: mio283qt9a_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 mio283qt9a_clear(FAR struct lcd_dev_s *dev, uint16_t color) { FAR struct mio283qt9a_dev_s *priv = (FAR struct mio283qt9a_dev_s *)dev; FAR struct mio283qt9a_lcd_s *lcd = priv->lcd; uint32_t i; /* Select the LCD and set the drawring area */ lcd->select(lcd); mio283qt9a_setarea(lcd, 0, 0, (MIO283QT9A_XRES - 1), (MIO283QT9A_YRES - 1)); /* Prepare to write GRAM data */ mio283qt9a_gramselect_write(lcd); /* Copy color into all of GRAM. * Orientation does not matter in this case. */ for (i = 0; i < MIO283QT9A_XRES * MIO283QT9A_YRES; i++) { mio283qt9a_gramwrite(lcd, color); } /* De-select the LCD */ lcd->deselect(lcd); } #endif /* CONFIG_LCD_MIO283QT9A */