/************************************************************************************** * drivers/lcd/ug-9664hswag01.c * Driver for the Univision UG-9664HSWAG01 Display with the Solomon Systech SSD1305 LCD * controller. * * Copyright (C) 2011 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Reference: "Product Specification, OEL Display Module, UG-9664HSWAG01", Univision * Technology Inc., SAS1-6020-B, January 3, 2008. * * 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 "ssd1305.h" /************************************************************************************** * Pre-processor Definitions **************************************************************************************/ /* Configuration **********************************************************************/ /* UG-9664HSWAG01 Configuration Settings: * * CONFIG_UG9664HSWAG01_SPIMODE - Controls the SPI mode * CONFIG_UG9664HSWAG01_FREQUENCY - Define to use a different bus frequency * CONFIG_UG9664HSWAG01_NINTERFACES - Specifies the number of physical * UG-9664HSWAG01 devices that will be supported. NOTE: At present, this * must be undefined or defined to be 1. * CONFIG_UG9664HSWAG01_POWER * If the hardware supports a controllable OLED a power supply, this * configuration should be defined. (See ug_power() below). * * Required LCD driver settings: * CONFIG_LCD_UG9664HSWAG01 - Enable UG-9664HSWAG01 support * CONFIG_LCD_MAXCONTRAST should be 255, but any value >0 and <=255 will be accepted. * CONFIG_LCD_MAXPOWER should be 2: 0=off, 1=dim, 2=normal * * Required SPI driver settings: * CONFIG_SPI_CMDDATA - Include support for cmd/data selection. */ /* Verify that all configuration requirements have been met */ /* The UG-9664HSWAG01 spec says that is supports SPI mode 0,0 only. However, sometimes * you need to tinker with these things. */ #ifndef CONFIG_UG9664HSWAG01_SPIMODE # define CONFIG_UG9664HSWAG01_SPIMODE SPIDEV_MODE0 #endif /* SPI frequency */ #ifndef CONFIG_UG9664HSWAG01_FREQUENCY # define CONFIG_UG9664HSWAG01_FREQUENCY 3500000 #endif /* CONFIG_UG9664HSWAG01_NINTERFACES determines the number of physical interfaces * that will be supported. */ #ifndef CONFIG_UG9664HSWAG01_NINTERFACES # define CONFIG_UG9664HSWAG01_NINTERFACES 1 #endif #if CONFIG_UG9664HSWAG01_NINTERFACES != 1 # warning "Only a single UG-9664HSWAG01 interface is supported" # undef CONFIG_UG9664HSWAG01_NINTERFACES # define CONFIG_UG9664HSWAG01_NINTERFACES 1 #endif /* Orientation */ #if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT) # warning "No support for portrait modes" # define CONFIG_LCD_LANDSCAPE 1 # undef CONFIG_LCD_PORTRAIT # undef CONFIG_LCD_RLANDSCAPE # undef CONFIG_LCD_RPORTRAIT #endif /* Check contrast selection */ #ifndef CONFIG_LCD_MAXCONTRAST # define CONFIG_LCD_MAXCONTRAST 255 #endif #if CONFIG_LCD_MAXCONTRAST <= 0 || CONFIG_LCD_MAXCONTRAST > 255 # error "CONFIG_LCD_MAXCONTRAST exceeds supported maximum" #endif #if CONFIG_LCD_MAXCONTRAST < 255 # warning "Optimal setting of CONFIG_LCD_MAXCONTRAST is 255" #endif /* Check power setting */ #if !defined(CONFIG_LCD_MAXPOWER) # define CONFIG_LCD_MAXPOWER 2 #endif #if CONFIG_LCD_MAXPOWER != 2 # warning "CONFIG_LCD_MAXPOWER should be 2" # undef CONFIG_LCD_MAXPOWER # define CONFIG_LCD_MAXPOWER 2 #endif /* The OLED requires CMD/DATA SPI support */ #ifndef CONFIG_SPI_CMDDATA # error "CONFIG_SPI_CMDDATA must be defined in your NuttX configuration" #endif /* Color Properties *******************************************************************/ /* The SSD1305 display controller can handle a resolution of 132x64. The OLED * on the base board is 96x64. */ #define UG_DEV_XRES 132 #define UG_XOFFSET 18 /* Display Resolution */ #define UG_LCD_XRES 96 #define UG_LCD_YRES 64 #if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) # define UG_XRES UG_LCD_XRES # define UG_YRES UG_LCD_YRES #else # define UG_XRES UG_LCD_YRES # define UG_YRES UG_LCD_XRES #endif /* Color depth and format */ #define UG_BPP 1 #define UG_COLORFMT FB_FMT_Y1 /* Bytes per logical row and actual device row */ #define UG_XSTRIDE (UG_XRES >> 3) /* Pixels arrange "horizontally for user" */ #define UG_YSTRIDE (UG_YRES >> 3) /* But actual device arrangement is "vertical" */ /* The size of the shadow frame buffer */ #define UG_FBSIZE (UG_XRES * UG_YSTRIDE) /* Orientation */ #if defined(CONFIG_LCD_LANDSCAPE) # undef UG_LCD_REVERSEX # undef UG_LCD_REVERSEY #elif defined(CONFIG_LCD_RLANDSCAPE) # define UG_LCD_REVERSEX 1 # define UG_LCD_REVERSEY 1 #endif /* Bit helpers */ #define LS_BIT (1 << 0) #define MS_BIT (1 << 7) /************************************************************************************** * Private Type Definition **************************************************************************************/ /* This structure describes the state of this driver */ struct ug_dev_s { /* Publicly visible device structure */ struct lcd_dev_s dev; /* Private LCD-specific information follows */ FAR struct spi_dev_s *spi; uint8_t contrast; uint8_t powered; /* The SSD1305 does not support reading from the display memory in SPI mode. * Since there is 1 BPP and access is byte-by-byte, it is necessary to keep * a shadow copy of the framebuffer memory. */ uint8_t fb[UG_FBSIZE]; }; /************************************************************************************** * Private Function Protototypes **************************************************************************************/ /* SPI helpers */ static void ug_select(FAR struct spi_dev_s *spi); static void ug_deselect(FAR struct spi_dev_s *spi); /* LCD Data Transfer Methods */ static int ug_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels); static int ug_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels); /* LCD Configuration */ static int ug_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo); static int ug_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 ug_getpower(struct lcd_dev_s *dev); static int ug_setpower(struct lcd_dev_s *dev, int power); static int ug_getcontrast(struct lcd_dev_s *dev); static int ug_setcontrast(struct lcd_dev_s *dev, unsigned int contrast); /* Initialization */ static inline void up_clear(FAR struct ug_dev_s *priv); /************************************************************************************** * Private Data **************************************************************************************/ /* 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. */ static uint8_t g_runbuffer[UG_XSTRIDE+1]; /* This structure describes the overall LCD video controller */ static const struct fb_videoinfo_s g_videoinfo = { .fmt = UG_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */ .xres = UG_XRES, /* Horizontal resolution in pixel columns */ .yres = UG_YRES, /* Vertical resolution in pixel rows */ .nplanes = 1, /* Number of color planes supported */ }; /* This is the standard, NuttX Plane information object */ static const struct lcd_planeinfo_s g_planeinfo = { .putrun = ug_putrun, /* Put a run into LCD memory */ .getrun = ug_getrun, /* Get a run from LCD memory */ .buffer = (FAR uint8_t *)g_runbuffer, /* Run scratch buffer */ .bpp = UG_BPP, /* Bits-per-pixel */ }; /* This is the standard, NuttX LCD driver object */ static struct ug_dev_s g_ugdev = { .dev = { /* LCD Configuration */ .getvideoinfo = ug_getvideoinfo, .getplaneinfo = ug_getplaneinfo, /* LCD RGB Mapping -- Not supported */ /* Cursor Controls -- Not supported */ /* LCD Specific Controls */ .getpower = ug_getpower, .setpower = ug_setpower, .getcontrast = ug_getcontrast, .setcontrast = ug_setcontrast, }, }; /************************************************************************************** * Private Functions **************************************************************************************/ /************************************************************************************** * Name: ug_powerstring * * Description: * Convert the power setting to a string. * **************************************************************************************/ static inline FAR const char *ug_powerstring(uint8_t power) { if (power == UG_POWER_OFF) { return "OFF"; } else if (power == UG_POWER_DIM) { return "DIM"; } else if (power == UG_POWER_ON) { return "ON"; } else { return "ERROR"; } } /************************************************************************************** * Name: ug_select * * Description: * Select the SPI, locking and re-configuring if necessary * * Input Parameters: * spi - Reference to the SPI driver structure * * Returned Value: * None * * Assumptions: * **************************************************************************************/ static void ug_select(FAR struct spi_dev_s *spi) { /* Select UG-9664HSWAG01 chip (locking the SPI bus in case there are multiple * devices competing for the SPI bus */ SPI_LOCK(spi, true); SPI_SELECT(spi, SPIDEV_DISPLAY(0), true); /* Now make sure that the SPI bus is configured for the UG-9664HSWAG01 (it * might have gotten configured for a different device while unlocked) */ SPI_SETMODE(spi, CONFIG_UG9664HSWAG01_SPIMODE); SPI_SETBITS(spi, 8); SPI_HWFEATURES(spi, 0); #ifdef CONFIG_UG9664HSWAG01_FREQUENCY SPI_SETFREQUENCY(spi, CONFIG_UG9664HSWAG01_FREQUENCY); #endif } /************************************************************************************** * Name: ug_deselect * * Description: * De-select the SPI * * Input Parameters: * spi - Reference to the SPI driver structure * * Returned Value: * None * * Assumptions: * **************************************************************************************/ static void ug_deselect(FAR struct spi_dev_s *spi) { /* De-select UG-9664HSWAG01 chip and relinquish the SPI bus. */ SPI_SELECT(spi, SPIDEV_DISPLAY(0), false); SPI_LOCK(spi, false); } /************************************************************************************** * Name: ug_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 ug_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels) { /* Because of this line of code, we will only be able to support a single UG device */ FAR struct ug_dev_s *priv = &g_ugdev; FAR uint8_t *fbptr; FAR uint8_t *ptr; uint8_t devcol; uint8_t fbmask; uint8_t page; uint8_t usrmask; uint8_t i; int pixlen; ginfo("row: %d col: %d npixels: %d\n", row, col, npixels); DEBUGASSERT(buffer); /* Clip the run to the display */ pixlen = npixels; if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)UG_XRES) { pixlen = (int)UG_XRES - (int)col; } /* Verify that some portion of the run remains on the display */ if (pixlen <= 0 || row > UG_YRES) { return OK; } /* Perform coordinate conversion for reverse landscape mode. * If the rows are reversed then rows are are a mirror reflection of * top to bottom. */ #ifdef UG_LCD_REVERSEY row = (UG_YRES-1) - row; #endif /* If the column is switched then the start of the run is the mirror of * the end of the run. * * col+pixlen-1 * col | * 0 | | XRES * . S>>>>>>E . * . E<<<<<> 3; /* Update the shadow frame buffer memory. First determine the pixel * position in the frame buffer memory. Pixels are organized like * this: * * --------+---+---+---+---+-...-+-----+ * Segment | 0 | 1 | 2 | 3 | ... | 131 | * --------+---+---+---+---+-...-+-----+ * Bit 0 | | X | | | | | * Bit 1 | | X | | | | | * Bit 2 | | X | | | | | * Bit 3 | | X | | | | | * Bit 4 | | X | | | | | * Bit 5 | | X | | | | | * Bit 6 | | X | | | | | * Bit 7 | | X | | | | | * --------+---+---+---+---+-...-+-----+ * * So, in order to draw a white, horizontal line, at row 45. we * would have to modify all of the bytes in page 45/8 = 5. We * would have to set bit 45%8 = 5 in every byte in the page. */ fbmask = 1 << (row & 7); fbptr = &priv->fb[page * UG_XRES + col]; #ifdef UG_LCD_REVERSEX ptr = fbptr + (pixlen - 1); #else ptr = fbptr; #endif #ifdef CONFIG_LCD_PACKEDMSFIRST usrmask = MS_BIT; #else usrmask = LS_BIT; #endif for (i = 0; i < pixlen; i++) { /* Set or clear the corresponding bit */ #ifdef UG_LCD_REVERSEX if ((*buffer & usrmask) != 0) { *ptr-- |= fbmask; } else { *ptr-- &= ~fbmask; } #else if ((*buffer & usrmask) != 0) { *ptr++ |= fbmask; } else { *ptr++ &= ~fbmask; } #endif /* Inc/Decrement to the next source pixel */ #ifdef CONFIG_LCD_PACKEDMSFIRST if (usrmask == LS_BIT) { buffer++; usrmask = MS_BIT; } else { usrmask >>= 1; } #else if (usrmask == MS_BIT) { buffer++; usrmask = LS_BIT; } else { usrmask <<= 1; } #endif } /* Offset the column position to account for smaller horizontal * display range. */ devcol = col + UG_XOFFSET; /* Select and lock the device */ ug_select(priv->spi); /* Select command transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), true); /* Set the starting position for the run */ SPI_SEND(priv->spi, SSD1305_SETPAGESTART+page); /* Set the page start */ SPI_SEND(priv->spi, SSD1305_SETCOLL + (devcol & 0x0f)); /* Set the low column */ SPI_SEND(priv->spi, SSD1305_SETCOLH + (devcol >> 4)); /* Set the high column */ /* Select data transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), false); /* Then transfer all of the data */ SPI_SNDBLOCK(priv->spi, fbptr, pixlen); /* Unlock and de-select the device */ ug_deselect(priv->spi); return OK; } /************************************************************************************** * Name: ug_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 ug_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels) { /* Because of this line of code, we will only be able to support a single UG device */ FAR struct ug_dev_s *priv = &g_ugdev; FAR uint8_t *fbptr; uint8_t page; uint8_t fbmask; uint8_t usrmask; uint8_t i; int pixlen; ginfo("row: %d col: %d npixels: %d\n", row, col, npixels); DEBUGASSERT(buffer); /* Clip the run to the display */ pixlen = npixels; if ((unsigned int)col + (unsigned int)pixlen > (unsigned int)UG_XRES) { pixlen = (int)UG_XRES - (int)col; } /* Verify that some portion of the run is actually the display */ if (pixlen <= 0 || row > UG_YRES) { return -EINVAL; } /* Perform coordinate conversion for reverse landscape mode. * If the rows are reversed then rows are are a mirror reflection of * top to bottom. */ #ifdef UG_LCD_REVERSEY row = (UG_YRES-1) - row; #endif /* If the column is switched then the start of the run is the mirror of * the end of the run. * * col+pixlen-1 * col | * 0 | | XRES * . S>>>>>>E . * . E<<<<<> 3; /* Update the shadow frame buffer memory. First determine the pixel * position in the frame buffer memory. Pixels are organized like * this: * * --------+---+---+---+---+-...-+-----+ * Segment | 0 | 1 | 2 | 3 | ... | 131 | * --------+---+---+---+---+-...-+-----+ * Bit 0 | | X | | | | | * Bit 1 | | X | | | | | * Bit 2 | | X | | | | | * Bit 3 | | X | | | | | * Bit 4 | | X | | | | | * Bit 5 | | X | | | | | * Bit 6 | | X | | | | | * Bit 7 | | X | | | | | * --------+---+---+---+---+-...-+-----+ * * So, in order to draw a white, horizontal line, at row 45. we * would have to modify all of the bytes in page 45/8 = 5. We * would have to set bit 45%8 = 5 in every byte in the page. */ fbmask = 1 << (row & 7); fbptr = &priv->fb[page * UG_XRES + col]; #ifdef CONFIG_LCD_PACKEDMSFIRST usrmask = MS_BIT; #else usrmask = LS_BIT; #endif *buffer = 0; for (i = 0; i < pixlen; i++) { /* Set or clear the corresponding bit */ #ifdef UG_LCD_REVERSEX uint8_t byte = *fbptr--; #else uint8_t byte = *fbptr++; #endif if ((byte & fbmask) != 0) { *buffer |= usrmask; } /* Inc/Decrement to the next destination pixel. Hmmmm. It looks like * this logic could write past the end of the user buffer. Revisit * this! */ #ifdef CONFIG_LCD_PACKEDMSFIRST if (usrmask == LS_BIT) { buffer++; *buffer = 0; usrmask = MS_BIT; } else { usrmask >>= 1; } #else if (usrmask == MS_BIT) { buffer++; *buffer = 0; usrmask = LS_BIT; } else { usrmask <<= 1; } #endif } return OK; } /************************************************************************************** * Name: ug_getvideoinfo * * Description: * Get information about the LCD video controller configuration. * **************************************************************************************/ static int ug_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo) { DEBUGASSERT(dev && vinfo); ginfo("fmt: %d xres: %d yres: %d nplanes: %d\n", g_videoinfo.fmt, g_videoinfo.xres, g_videoinfo.yres, g_videoinfo.nplanes); memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s)); return OK; } /************************************************************************************** * Name: ug_getplaneinfo * * Description: * Get information about the configuration of each LCD color plane. * **************************************************************************************/ static int ug_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno, FAR struct lcd_planeinfo_s *pinfo) { DEBUGASSERT(dev && pinfo && planeno == 0); ginfo("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp); memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s)); return OK; } /************************************************************************************** * Name: ug_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 ug_getpower(struct lcd_dev_s *dev) { struct ug_dev_s *priv = (struct ug_dev_s *)dev; DEBUGASSERT(priv); ginfo("powered: %s\n", ug_powerstring(priv->powered)); return priv->powered; } /************************************************************************************** * Name: ug_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 ug_setpower(struct lcd_dev_s *dev, int power) { struct ug_dev_s *priv = (struct ug_dev_s *)dev; DEBUGASSERT(priv && (unsigned)power <= CONFIG_LCD_MAXPOWER); ginfo("power: %s powered: %s\n", ug_powerstring(power), ug_powerstring(priv->powered)); /* Select and lock the device */ ug_select(priv->spi); if (power <= UG_POWER_OFF) { /* Turn the display off */ SPI_SEND(priv->spi, SSD1305_DISPOFF); /* Display off */ /* Remove power to the device */ ug_power(0, false); priv->powered = UG_POWER_OFF; } else { /* Turn the display on, dim or normal */ if (power == UG_POWER_DIM) { SPI_SEND(priv->spi, SSD1305_DISPONDIM); /* Display on, dim mode */ } else /* if (power > UG_POWER_DIM) */ { SPI_SEND(priv->spi, SSD1305_DISPON); /* Display on, normal mode */ power = UG_POWER_ON; } SPI_SEND(priv->spi, SSD1305_DISPRAM); /* Resume to RAM content display */ /* Restore power to the device */ ug_power(0, true); priv->powered = power; } ug_deselect(priv->spi); return OK; } /************************************************************************************** * Name: ug_getcontrast * * Description: * Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST). * **************************************************************************************/ static int ug_getcontrast(struct lcd_dev_s *dev) { struct ug_dev_s *priv = (struct ug_dev_s *)dev; DEBUGASSERT(priv); return (int)priv->contrast; } /************************************************************************************** * Name: ug_setcontrast * * Description: * Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST). * **************************************************************************************/ static int ug_setcontrast(struct lcd_dev_s *dev, unsigned int contrast) { struct ug_dev_s *priv = (struct ug_dev_s *)dev; ginfo("contrast: %d\n", contrast); DEBUGASSERT(priv); if (contrast > 255) { return -EINVAL; } /* Select and lock the device */ ug_select(priv->spi); /* Select command transfer */ SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), true); /* Set the contrast */ SPI_SEND(priv->spi, SSD1305_SETCONTRAST); /* Set contrast control register */ SPI_SEND(priv->spi, contrast); /* Data 1: Set 1 of 256 contrast steps */ priv->contrast = contrast; /* Unlock and de-select the device */ ug_deselect(priv->spi); return OK; } /************************************************************************************** * Name: up_clear * * Description: * Clear the display. * **************************************************************************************/ static inline void up_clear(FAR struct ug_dev_s *priv) { FAR struct spi_dev_s *spi = priv->spi; int page; int i; /* Clear the framebuffer */ memset(priv->fb, UG_Y1_BLACK, UG_FBSIZE); /* Select and lock the device */ ug_select(priv->spi); /* Go through all 8 pages */ for (page = 0, i = 0; i < 8; i++) { /* Select command transfer */ SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), true); /* Set the starting position for the run */ SPI_SEND(priv->spi, SSD1305_SETPAGESTART+i); SPI_SEND(priv->spi, SSD1305_SETCOLL + (UG_XOFFSET & 0x0f)); SPI_SEND(priv->spi, SSD1305_SETCOLH + (UG_XOFFSET >> 4)); /* Select data transfer */ SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), false); /* Then transfer all 96 columns of data */ SPI_SNDBLOCK(priv->spi, &priv->fb[page * UG_XRES], UG_XRES); } /* Unlock and de-select the device */ ug_deselect(spi); } /************************************************************************************** * Public Functions **************************************************************************************/ /************************************************************************************** * Name: ug_initialize * * Description: * Initialize the UG-9664HSWAG01 video hardware. The initial state of the * OLED is fully initialized, display memory cleared, and the OLED ready to * use, but with the power setting at 0 (full off == sleep mode). * * Input Parameters: * * spi - A reference to the SPI driver instance. * devno - A value in the range of 0 through CONFIG_UG9664HSWAG01_NINTERFACES-1. * This allows support for multiple OLED devices. * * Returned Value: * * On success, this function returns a reference to the LCD object for the specified * OLED. NULL is returned on any failure. * **************************************************************************************/ FAR struct lcd_dev_s *ug_initialize(FAR struct spi_dev_s *spi, unsigned int devno) { /* Configure and enable LCD */ FAR struct ug_dev_s *priv = &g_ugdev; ginfo("Initializing\n"); DEBUGASSERT(spi && devno == 0); /* Save the reference to the SPI device */ priv->spi = spi; /* Select and lock the device */ ug_select(spi); /* Make sure that the OLED off */ ug_power(0, false); /* Select command transfer */ SPI_CMDDATA(spi, SPIDEV_DISPLAY(0), true); /* Configure the device */ SPI_SEND(spi, SSD1305_SETCOLL + 2); /* Set low column address */ SPI_SEND(spi, SSD1305_SETCOLH + 2); /* Set high column address */ SPI_SEND(spi, SSD1305_SETSTARTLINE+0); /* Display start set */ SPI_SEND(spi, SSD1305_SCROLL_STOP); /* Stop horizontal scroll */ SPI_SEND(spi, SSD1305_SETCONTRAST); /* Set contrast control register */ SPI_SEND(spi, 0x32); /* Data 1: Set 1 of 256 contrast steps */ SPI_SEND(spi, SSD1305_SETBRIGHTNESS); /* Brightness for color bank */ SPI_SEND(spi, 0x80); /* Data 1: Set 1 of 256 contrast steps */ SPI_SEND(spi, SSD1305_MAPCOL131); /* Set segment re-map */ SPI_SEND(spi, SSD1305_DISPNORMAL); /* Set normal display */ //(void)SPI_SEND(spi, SSD1305_DISPINVERTED); /* Set inverse display */ SPI_SEND(spi, SSD1305_SETMUX); /* Set multiplex ratio */ SPI_SEND(spi, 0x3f); /* Data 1: MUX ratio -1: 15-63 */ SPI_SEND(spi, SSD1305_SETOFFSET); /* Set display offset */ SPI_SEND(spi, 0x40); /* Data 1: Vertical shift by COM: 0-63 */ SPI_SEND(spi, SSD1305_MSTRCONFIG); /* Set dc-dc on/off */ SPI_SEND(spi, SSD1305_MSTRCONFIG_EXTVCC); /* Data 1: Select external Vcc */ SPI_SEND(spi, SSD1305_SETCOMREMAPPED); /* Set com output scan direction */ SPI_SEND(spi, SSD1305_SETDCLK); /* Set display clock divide * ratio/oscillator/frequency */ SPI_SEND(spi, 15 << SSD1305_DCLKFREQ_SHIFT | 0 << SSD1305_DCLKDIV_SHIFT); SPI_SEND(spi, SSD1305_SETCOLORMODE); /* Set area color mode on/off & low power * display mode */ SPI_SEND(spi, SSD1305_COLORMODE_MONO | SSD1305_POWERMODE_LOW); SPI_SEND(spi, SSD1305_SETPRECHARGE); /* Set pre-charge period */ SPI_SEND(spi, 15 << SSD1305_PHASE2_SHIFT | 1 << SSD1305_PHASE1_SHIFT); SPI_SEND(spi, SSD1305_SETCOMCONFIG); /* Set COM configuration */ SPI_SEND(spi, SSD1305_COMCONFIG_ALT); /* Data 1, Bit 4: 1=Alternative COM pin configuration */ SPI_SEND(spi, SSD1305_SETVCOMHDESEL); /* Set VCOMH deselect level */ SPI_SEND(spi, SSD1305_VCOMH_x7p7); /* Data 1: ~0.77 x Vcc */ SPI_SEND(spi, SSD1305_SETLUT); /* Set look up table for area color */ SPI_SEND(spi, 0x3f); /* Data 1: Pulse width: 31-63 */ SPI_SEND(spi, 0x3f); /* Data 2: Color A: 31-63 */ SPI_SEND(spi, 0x3f); /* Data 3: Color B: 31-63 */ SPI_SEND(spi, 0x3f); /* Data 4: Color C: 31-63 */ SPI_SEND(spi, SSD1305_DISPON); /* Display on, normal mode */ SPI_SEND(spi, SSD1305_DISPRAM); /* Resume to RAM content display */ /* Let go of the SPI lock and de-select the device */ ug_deselect(spi); /* Clear the framebuffer */ up_mdelay(100); up_clear(priv); return &priv->dev; }