/**************************************************************************** * drivers/lcd/ssd1680.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. * ****************************************************************************/ /* Driver for e-paper displays with SSD1680 controller. * * References: * 1. https://www.crystalfontz.com/controllers/SolomonSystech/SSD1680/497/ * 2. https://www.adafruit.com/product/4947 * (driver for display 2.9 inch mono) * 3. https://github.com/waveshare/e-Paper * (driver for display 2.13 v2 mono) * TTGO-Electronic-Badge mixed with commands found in waveshare library that * display picture. Additional commands from Waveshare library have suffixes * with letters e.g. 1a, 2b * cmd: dta: * Hardware reset and busy wait * 1) 0x01 27 01 00 * 1a) 0x74 0x54 * 2b) 0x7E 0x3B * 2) 0x0C D7 D6 9D boost soft start * 3) 0x2c A8 write VCom * 4) 0x3A 0x1A Set dumy line. Can't find it in in SSD documentation * 5) 0x3B 0x08 Set gate time. Can't find it in in SSD documentation * 5a) 0x3C 0x03 write border with data. Only in 2.13 v2 * 6) 0x11 01 Data Mode * 7) 0x44 00 0F * 8) 0x45 27 01 00 00 * 9) 0x4E 00 * 10) 0x4F 27 01 * 11) 0x32 50 AA 55 AA 11 00 00 00 00 00 00 00 00 00 00 00 * 00 00 00 00 FF FF 1F 00 00 00 00 00 00 00 * LUT depends on display and step 5a * 12) 0x22 C0 * 13) 0x20 * Busy Wait * 14) 0x24 0xFF ... 4736 bytes with bitmap * 15) 0x22 C4 * 16) 0x20 * Busy Wait * 17) 0xFF * 18) 0x22 C3 * 19) 0x20 * Busy Wait */ /**************************************************************************** * Device memory organization: * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "ssd1680.h" #ifdef CONFIG_LCD_SSD1680 /* This structure describes the state of the SSD1680 driver */ /**************************************************************************** * Private Types ****************************************************************************/ struct ssd1680_dev_s { struct lcd_dev_s dev; /* Publicly visible device structure */ /* Private LCD-specific information follows */ FAR struct spi_dev_s *spi; /* Cached SPI device reference */ uint8_t contrast; /* Current contrast setting */ bool on; /* true: display is on */ bool is_conf; /* true: display had been configured */ FAR const struct ssd1680_priv_s *board_priv; /* Board specific structure */ /* The SSD1680 does not support reading from the display memory in SPI * mode. Since there is 1 BPP and access is byte-by-byte. * Also shared line (MISO/MOSI) could be problematic. Now implementation * uses shadow buffer. * Its size depends on resolution and is between 4kB and 32 kB. */ uint8_t shadow_fb[SSD1680_DEV_FBSIZE]; }; /**************************************************************************** * Private Function Prototypes ****************************************************************************/ /* Libc extension */ static FAR void *bitscpy_ds(FAR void *dest, int dest_offset, FAR const void *src, size_t nbits); static FAR void *bitscpy_ss(FAR void *dest, FAR const void *src, int src_offset, size_t nbits); /* LCD Data Transfer Methods */ static int ssd1680_busy_wait(FAR struct ssd1680_dev_s *priv); static void ssd1680_snd_cmd_with_data0(FAR struct ssd1680_dev_s *priv, uint8_t cmd); static void ssd1680_snd_cmd_with_data1(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1); static void ssd1680_snd_cmd_with_data2(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1, uint8_t dta2); static void ssd1680_snd_cmd_with_data3(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1, uint8_t dta2, uint8_t dta3); static void ssd1680_snd_cmd_with_data4(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1, uint8_t dta2, uint8_t dta3, uint8_t dta4); static void ssd1680_snd_cmd_with_data(FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta, int dta_len); #if !defined(CONFIG_LCD_PORTRAIT) && !defined(CONFIG_LCD_RPORTRAIT) # if SSD1680_DEV_BPP == 1 static void ssd1680_snd_cmd_with_data_bitstrip( FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta, int dta_len, int strip_len); # else /* Special functions for sending to RAM1 and RAM2 should be implemented * ssd1680_snd_cmd_with_data_bitstrip works fine with 1 bit per pixel */ # error "SSD1680 driver has no implementation for 3 color with landscape" # endif #endif static void ssd1680_configspi(FAR struct spi_dev_s *spi); static void ssd1680_select(FAR struct ssd1680_dev_s *priv, bool cs); static void ssd1680_cmddata(FAR struct ssd1680_dev_s *priv, bool cmd); static int ssd1680_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels); static int ssd1680_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels); static int ssd1680_redraw(FAR struct lcd_dev_s *dev); /* LCD Configuration */ static int ssd1680_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo); static int ssd1680_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 ssd1680_getpower(struct lcd_dev_s *dev); static int ssd1680_setpower(struct lcd_dev_s *dev, int power); static int ssd1680_configuredisplay(struct ssd1680_dev_s *priv); static int ssd1680_redraw_display(struct ssd1680_dev_s *priv); static int ssd1680_update_row(struct ssd1680_dev_s *priv, int row); static int ssd1680_update_all_and_redraw(struct ssd1680_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[SSD1680_DEV_ROWSIZE]; /* This structure describes the overall LCD video controller */ static const struct fb_videoinfo_s g_videoinfo = { .fmt = SSD1680_DEV_COLORFMT, /* Color format: B&W */ .xres = SSD1680_DEV_FB_XRES, /* Horizontal resolution in pixel col */ .yres = SSD1680_DEV_FB_YRES, /* Vertical resolution in pixel rows */ .nplanes = SSD1680_NO_OF_PLANES, /* Number of color planes supported */ }; /* This is the standard, NuttX Plane information object */ static const struct lcd_planeinfo_s g_planeinfo = { .putrun = ssd1680_putrun, /* Put a run into LCD memory */ .putarea = NULL, /* Not need to implement */ .getrun = ssd1680_getrun, /* Read content of shadow memory */ .getarea = NULL, /* Not need to implement */ .redraw = ssd1680_redraw, /* Update drivers memory and redraw */ .buffer = (FAR uint8_t *)g_runbuffer, /* Run scratch buffer */ .bpp = SSD1680_DEV_BPP, /* Bits-per-pixel */ }; /* This is the outside visible interface for the OLED driver */ static const struct lcd_dev_s g_lcd_epaper_dev = { /* LCD Configuration */ .getvideoinfo = ssd1680_getvideoinfo, .getplaneinfo = ssd1680_getplaneinfo, /* LCD RGB Mapping -- Not supported */ /* Cursor Controls -- Not supported */ /* LCD Specific Controls */ .getpower = ssd1680_getpower, .setpower = ssd1680_setpower, /* setcontrast could be implemented in future by changing * dispalys voltage and LUT table */ }; /* This is the OLED driver instance. Only a single device is supported * for now. */ static struct ssd1680_dev_s g_epaperdev; static const uint8_t ssd1680_lut[] = { #if defined(CONFIG_LCD_SSD1680_2_90) 0x50, 0xaa, 0x55, 0xaa, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 #elif defined(CONFIG_LCD_SSD1680_2_13_V2) 0x80, 0x60, 0x40, 0x00, 0x00, 0x00, 0x00, /* LUT0: BB: VS 0 ~7 */ 0x10, 0x60, 0x20, 0x00, 0x00, 0x00, 0x00, /* LUT1: BW: VS 0 ~7 */ 0x80, 0x60, 0x40, 0x00, 0x00, 0x00, 0x00, /* LUT2: WB: VS 0 ~7 */ 0x10, 0x60, 0x20, 0x00, 0x00, 0x00, 0x00, /* LUT3: WW: VS 0 ~7 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* LUT4: VCOM: VS 0 ~7 */ 0x03, 0x03, 0x00, 0x00, 0x02, /* TP0 A~D RP0 */ 0x09, 0x09, 0x00, 0x00, 0x02, /* TP1 A~D RP1 */ 0x03, 0x03, 0x00, 0x00, 0x02, /* TP2 A~D RP2 */ 0x00, 0x00, 0x00, 0x00, 0x00, /* TP3 A~D RP3 */ 0x00, 0x00, 0x00, 0x00, 0x00, /* TP4 A~D RP4 */ 0x00, 0x00, 0x00, 0x00, 0x00, /* TP5 A~D RP5 */ 0x00, 0x00, 0x00, 0x00, 0x00 /* TP6 A~D RP6 */ #else # error "Missing LUT table" #endif }; /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: ssd1680_putrun * * Description: * This method can be used to write a partial raster line to the LCD. * * Input Parameters: * dev - The lcd device * 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. * ****************************************************************************/ static int ssd1680_putrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer, size_t npixels) { FAR struct ssd1680_dev_s *priv = (FAR struct ssd1680_dev_s *)dev; uint8_t *dst = priv->shadow_fb + row * SSD1680_DEV_ROWSIZE + (col >> SSD1680_PDF); int dst_start_bitshift = col % (SSD1680_PDV); /* Write data to shadow memory */ bitscpy_ds(dst, dst_start_bitshift, buffer, npixels); return OK; } /**************************************************************************** * Name: ssd1680_getrun * * Description: * This method can be used to read a partial raster line from the LCD: * * Input Parameters: * * dev - The lcd device * 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 ssd1680_getrun(FAR struct lcd_dev_s *dev, fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer, size_t npixels) { FAR struct ssd1680_dev_s *priv = (FAR struct ssd1680_dev_s *)dev; bitscpy_ss(buffer, priv->shadow_fb + row * SSD1680_DEV_FBSIZE + (col >> SSD1680_PDF), col % SSD1680_PDV, npixels); return OK; } static int ssd1680_redraw(FAR struct lcd_dev_s *dev) { FAR struct ssd1680_dev_s *priv = (FAR struct ssd1680_dev_s *)dev; return ssd1680_update_all_and_redraw(priv); } /**************************************************************************** * Name: ssd1680_getvideoinfo * * Description: * Get information about the LCD video controller configuration. * ****************************************************************************/ static int ssd1680_getvideoinfo(FAR struct lcd_dev_s *dev, FAR struct fb_videoinfo_s *vinfo) { DEBUGASSERT(dev && vinfo); lcdinfo("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: ssd1680_getplaneinfo * * Description: * Get information about the configuration of each LCD color plane. * ****************************************************************************/ static int ssd1680_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno, FAR struct lcd_planeinfo_s *pinfo) { DEBUGASSERT(pinfo && planeno == 0); lcdinfo("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp); memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s)); pinfo->dev = dev; return OK; } /**************************************************************************** * Name: ssd1680_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 ssd1680_getpower(FAR struct lcd_dev_s *dev) { struct ssd1680_dev_s *priv = (struct ssd1680_dev_s *) dev; DEBUGASSERT(priv); lcdinfo("power: %s\n", priv->on ? "ON" : "OFF"); return priv->on ? CONFIG_LCD_MAXPOWER : 0; } static void ssd1680_reset(struct ssd1680_dev_s *priv) { if (priv->board_priv && priv->board_priv->set_rst) { lcdinfo("Hardware reset\n"); priv->board_priv->set_rst(false); nxsig_usleep(10); priv->board_priv->set_rst(true); } else { lcdinfo("Hardware reset is not available. Operation skipped.\n"); } } /**************************************************************************** * Name: ssd1680_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 ssd1680_setpower(FAR struct lcd_dev_s *dev, int power) { int ret = OK; struct ssd1680_dev_s *priv = (struct ssd1680_dev_s *) dev; DEBUGASSERT(dev); lcdinfo("power: %d -> %d\n", priv->on ? CONFIG_LCD_MAXPOWER : 0, power); DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER); if (power <= 0) { priv->on = false; /* Try turn off power completely */ if (priv->board_priv && priv->board_priv->set_vcc) { /* Do power off. */ if (priv->board_priv->set_vcc(false)) { /* Display is completely powered off, not configured anymore. */ priv->is_conf = false; } } } else { if (priv->board_priv && priv->board_priv->set_vcc) { /* Do power on. */ lcdinfo("Set Pwr Ctrl Linepower ON\n"); priv->board_priv->set_vcc(true); nxsig_usleep(10000); } else { lcdinfo("No line for controlling PWR, operation skipped\n"); } if (!priv->is_conf) { ssd1680_reset(priv); ret = ssd1680_configuredisplay(priv); if (ret != OK) { lcderr("Failed to configure display\n"); return ret; } /* Draw the framebuffer */ ret = ssd1680_update_all_and_redraw(priv); if (ret != OK) { lcderr("Failed to update and redraw\n"); return ret; } } priv->on = true; } return ret; } /**************************************************************************** * Name: ssd1680_configuredisplay * * Description: * Setup LCD display. * ****************************************************************************/ static int ssd1680_configuredisplay(struct ssd1680_dev_s *priv) { int ret; /* Software Reset */ lcdinfo("Software reset: (0x%02x)\n", SSD1680_SW_RESET); ssd1680_snd_cmd_with_data0(priv, SSD1680_SW_RESET); /* Busy wait */ ret = ssd1680_busy_wait(priv); if (ret != OK) { lcderr("Configuration is not ready\n"); return ret; } /* Step 1: Driver Output Control 3 bytes of data: * - A[8:0] MUX Gate lines * - B[2:0] sequence * last data byte depends on connection between display and controller */ lcdinfo("Set the driver output control (0x%02x): %d 0x%02x\n", SSD1680_DRIVER_CONTROL, SSD1680_DEV_NATIVE_YRES - 1, SSD1680_DEV_GATE_LAYOUT); ssd1680_snd_cmd_with_data3(priv, SSD1680_DRIVER_CONTROL, (uint8_t)((SSD1680_DEV_NATIVE_YRES - 1) & 0xff), (SSD1680_DEV_NATIVE_YRES - 1) >> 8, SSD1680_DEV_GATE_LAYOUT); #if defined(CONFIG_LCD_SSD1680_2_13_V2) /* Step 1a: Set analog block control * After reset this register should have proper value */ lcdinfo("Set analog block control (0x74): 0x54\n"); ssd1680_snd_cmd_with_data1(priv, SSD1680_SET_ANALOG_BLOCK_CTRL, 0x54); /* Step 1b: Set digital block control * After reset this register should have proper value */ lcdinfo("Set digital block control (0x7e): 0x3b\n"); ssd1680_snd_cmd_with_data1(priv, SSD1680_SET_DIGITAL_BLOCK_CTRL, 0x3b); #endif /* Step 2: SSD1680_BOOST_SOFTSTART 0x0C D7 D6 9D */ lcdinfo("Set boost soft start (0x%02x): 0x%02x, 0x%02x, 0x%02x\n", SSD1680_BOOST_SOFTSTART, 0xd7, 0xd6, 0x9d); ssd1680_snd_cmd_with_data3(priv, SSD1680_BOOST_SOFTSTART, 0xd7, 0xd6, 0x9d); /* Step 3: Vcom Voltage SSD1680_WRITE_VCOM */ lcdinfo("Set Vcom voltage (0x%02x): 0x%02x\n", SSD1680_WRITE_VCOM, SSD1680_VALUE_VCOM); ssd1680_snd_cmd_with_data1(priv, SSD1680_WRITE_VCOM, SSD1680_VALUE_VCOM); lcdinfo("Set Gate voltage (0x%02x): 0x%02x\n", SSD1680_GATE_VOLTAGE, SSD1680_VALUE_G_VOLTAGE); ssd1680_snd_cmd_with_data1(priv, SSD1680_GATE_VOLTAGE, SSD1680_VALUE_G_VOLTAGE); lcdinfo("Set Source voltage (0x%02x): 0x%02x, 0x%02x, 0x%02x\n", SSD1680_SOURCE_VOLTAGE, SSD1680_VALUE_S_VOLTAGE_1, SSD1680_VALUE_S_VOLTAGE_2, SSD1680_VALUE_S_VOLTAGE_3); ssd1680_snd_cmd_with_data3(priv, SSD1680_SOURCE_VOLTAGE, SSD1680_VALUE_S_VOLTAGE_1, SSD1680_VALUE_S_VOLTAGE_2, SSD1680_VALUE_S_VOLTAGE_3); /* Step 4: Sending undocumented command: 0x3a with data 1A */ lcdinfo("Set dummy line (0x%02x): 0x%02x\n", SSD1680_DUMMY_LINE, SSD1680_VALUE_DUMMY_LINE); ssd1680_snd_cmd_with_data1(priv, SSD1680_DUMMY_LINE, SSD1680_VALUE_DUMMY_LINE); /* Step 5: Sending undocumented command: 0x3b with data 08 */ lcdinfo("Set gate time (0x%02x): 0x%02x\n", SSD1680_GATE_TIME, SSD1680_VALUE_GATE_TIME); ssd1680_snd_cmd_with_data1(priv, SSD1680_GATE_TIME, SSD1680_VALUE_GATE_TIME); #if defined(CONFIG_LCD_SSD1680_2_13_V2) /* Step 5a: Sending command write border with data 0x03: * - Follow LUT (Output VCOM @ RED) * - Transition setting for VBD: LUT3 */ lcdinfo("Set Border Waveform (0x%02x): 0x%02x\n", SSD1680_WRITE_BORDER, 0x03); ssd1680_snd_cmd_with_data1(priv, SSD1680_WRITE_BORDER, 0x03); #endif /* Step 6: Data entry mode SSD1680_DATA_MODE, 0x03 */ lcdinfo("Set data entry mode (0x%02x): 0x%02x\n", SSD1680_DATA_MODE, SSD1680_VAL_DATA_MODE); ssd1680_snd_cmd_with_data1(priv, SSD1680_DATA_MODE, SSD1680_VAL_DATA_MODE); /* Step 7: Set ram X start/end position 00 FF */ lcdinfo("Set ram X start/end position (0x%02x): 0, %d\n", SSD1680_SET_RAMXPOS, (SSD1680_DEV_X_ROUND_UP >> 3)-1); ssd1680_snd_cmd_with_data2(priv, SSD1680_SET_RAMXPOS, 0x00, (SSD1680_DEV_X_ROUND_UP >> 3)-1); /* Step 8: Set ram Y start/end position */ lcdinfo("Set ram Y start/end position (0x%02x): 0, %d\n", SSD1680_SET_RAMYPOS, SSD1680_DEV_NATIVE_YRES - 1); ssd1680_snd_cmd_with_data4(priv, SSD1680_SET_RAMYPOS, 0x00, 0x00, (uint8_t)((SSD1680_DEV_NATIVE_YRES - 1) & 0xff), (SSD1680_DEV_NATIVE_YRES - 1) >> 8); /* Step 9: SSD1680_SET_RAMXCOUNT, 0 */ lcdinfo("Set ram X count (0x%02x): 0\n", SSD1680_SET_RAMXCOUNT); ssd1680_snd_cmd_with_data1(priv, SSD1680_SET_RAMXCOUNT, 0x00); /* Step 10: SSD1680_SET_RAMYCOUNT, 0, 0 */ lcdinfo("Set ram Y count (0x%02x): 0\n", SSD1680_SET_RAMYCOUNT); ssd1680_snd_cmd_with_data2(priv, SSD1680_SET_RAMYCOUNT, 0x00, 0x00); /* Step 11: Lookup table */ lcdinfo("Write lookup table (0x%02x): (%d bytes)\n", SSD1680_WRITE_LUT, sizeof (ssd1680_lut)); ssd1680_snd_cmd_with_data(priv, SSD1680_WRITE_LUT, ssd1680_lut, sizeof (ssd1680_lut)); /* Step 12: Write sequence */ lcdinfo("Write control sequence (0x%02x): 0x%02x\n", SSD1680_DISP_CTRL2, 0xc0); ssd1680_snd_cmd_with_data1(priv, SSD1680_DISP_CTRL2, 0xc7); /* Step 13: Master Activate and busy wait */ lcdinfo("Write master activate (0x%02x) command\n", SSD1680_MASTER_ACTIVATE); ssd1680_snd_cmd_with_data0(priv, SSD1680_MASTER_ACTIVATE); ret = ssd1680_busy_wait(priv); if (ret == OK) { lcdinfo("Configuration ready\n"); priv->is_conf = true; } else { lcderr("Configuration is not ready\n"); } return ret; } /**************************************************************************** * Name: ssd1680_update_all_and_redraw * * Description: * Copy content of shadow buffer to drivers memory. * Redraws the display * * Input Parameters: * priv - Reference to private driver structure * * Assumptions: * E-ink is slow, so we don't need to optimize code in order to send all * lines at once using DMA. Now function sends each line in separate * function calls. E-ink driver lets to send all frame buffer using one * transmission (only in portrait and reverse portrait mode) * ****************************************************************************/ static int ssd1680_update_all_and_redraw(struct ssd1680_dev_s *priv) { int row; #if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT) const int row_incr = 1; #else # if SSD1680_DEV_BPP == 1 const int row_incr = 8; # else const int row_incr = 4; # endif #endif for (row = 0; row < SSD1680_DEV_FB_YRES; row += row_incr) { ssd1680_update_row(priv, row); } ssd1680_redraw_display(priv); return OK; } static int ssd1680_redraw_display(struct ssd1680_dev_s *priv) { /* Synchronize shadow buffer with drivers memory */ int ret; /* Step 15: * Set control register 2. * 1 byte of data with following bits: * 0x80 - enable clock signal * 0x40 - enable analog * 0x20 - load temperature value * 0x10 - Load LUT * 0x08 - Display Mode 2 * 0x04 - disable OSC * 0x02 - disable analog * 0x01 - disable clock signal */ ssd1680_snd_cmd_with_data1(priv, SSD1680_DISP_CTRL2, 0xc4); /* Step 16: */ ssd1680_snd_cmd_with_data0(priv, SSD1680_MASTER_ACTIVATE); ret = ssd1680_busy_wait(priv); /* Step 18: */ ssd1680_snd_cmd_with_data1(priv, SSD1680_DISP_CTRL2, 0xc3); /* Step 19: */ ssd1680_snd_cmd_with_data0(priv, SSD1680_MASTER_ACTIVATE); ssd1680_busy_wait(priv); if (ret != OK) { lcderr("FAILED!!! Busy state timeout\n"); } else { lcdinfo("Done\n"); } return OK; } static int ssd1680_update_row(struct ssd1680_dev_s *priv, int row) { #if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT) uint8_t *src = priv->shadow_fb + row * SSD1680_DEV_ROWSIZE; ssd1680_snd_cmd_with_data1(priv, SSD1680_SET_RAMXCOUNT, 0); ssd1680_snd_cmd_with_data2(priv, SSD1680_SET_RAMYCOUNT, row, row >> 8); #if SSD1680_DEV_BPP == 1 ssd1680_snd_cmd_with_data(priv, SSD1680_WRITE_RAM1, src, SSD1680_DEV_ROWSIZE); #else ssd1680_snd_cmd_with_data_even_bits(priv, SSD1680_WRITE_RAM1, src, SSD1680_DEV_ROWSIZE); ssd1680_snd_cmd_with_data1(priv, SSD1680_SET_RAMXCOUNT, 1); ssd1680_snd_cmd_with_data2(priv, SSD1680_SET_RAMYCOUNT, row, row >> 8); ssd1680_snd_cmd_with_data_odd_bits(priv, SSD1680_WRITE_RAM2, src, SSD1680_DEV_FBSIZE); #endif #else int row_group = (row >> 3) << 3; uint8_t *src = priv->shadow_fb + row_group * SSD1680_DEV_ROWSIZE; ssd1680_snd_cmd_with_data1(priv, SSD1680_SET_RAMXCOUNT, row >> 3); ssd1680_snd_cmd_with_data2(priv, SSD1680_SET_RAMYCOUNT, 0, 0); # if SSD1680_DEV_BPP == 1 ssd1680_snd_cmd_with_data_bitstrip(priv, SSD1680_WRITE_RAM1, src, SSD1680_DEV_NATIVE_YRES, SSD1680_DEV_ROWSIZE); # else # error "Landscape mode with 3 colors is not implemented" /* TODO send ssd1680_snd_cmd_with_data_even_bits_bitstrip * (priv, SSD1680_WRITE_RAM1, src, SSD1680_DEV_NATIVE_YRES, * SSD1680_DEV_ROWSIZE); */ ssd1680_snd_cmd_with_data1(priv, SSD1680_SET_RAMXCOUNT, row >> 3); ssd1680_snd_cmd_with_data2(priv, SSD1680_SET_RAMYCOUNT, 0, 0); /* TODO send ssd1680_snd_cmd_with_data_odd_bits_bitstrip(priv, * SSD1680_WRITE_RAM2, src, SSD1680_DEV_NATIVE_YRESSSD1680_DEV_ROWSIZE, ); */ # endif #endif return OK; } /**************************************************************************** * Name: ssd1680_configspi * * Description: * ****************************************************************************/ static void ssd1680_configspi(FAR struct spi_dev_s *spi) { /* Configure SPI for the SSD1680 */ SPI_SETMODE(spi, CONFIG_SSD1680_SPIMODE); SPI_SETBITS(spi, 8); SPI_HWFEATURES(spi, 0); SPI_SETFREQUENCY(spi, CONFIG_SSD1680_FREQUENCY); } /**************************************************************************** * Name: ssd1680_select * * Description: * Enable/Disable SSD1680 SPI CS * ****************************************************************************/ static void ssd1680_select(FAR struct ssd1680_dev_s *priv, bool cs) { /* If we are selecting the device */ if (cs == true) { /* If SPI bus is shared then lock and configure it */ SPI_LOCK(priv->spi, true); ssd1680_configspi(priv->spi); } /* Select/deselect SPI device */ SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), cs); /* If we are deselecting the device */ if (cs == false) { /* Unlock bus */ SPI_LOCK(priv->spi, false); } } static int ssd1680_busy_wait(FAR struct ssd1680_dev_s *priv) { int max_wait_time = 200; if ((priv->board_priv != NULL) && (priv->board_priv->check_busy != NULL)) { while (priv->board_priv->check_busy() && max_wait_time-- > 0) { nxsig_usleep(1000); } } else { nxsig_usleep(max_wait_time * 1000); } if (max_wait_time == 0) { lcderr("Timeout. Ignoring Busy state... " "Display is probably not ready\n"); return ERROR; } return OK; } static void ssd1680_snd_cmd_with_data0(FAR struct ssd1680_dev_s *priv, uint8_t cmd) { ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_select(priv, false); } static void ssd1680_snd_cmd_with_data1(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1) { ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); SPI_SEND(priv->spi, dta1); ssd1680_select(priv, false); } static void ssd1680_snd_cmd_with_data2(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1, uint8_t dta2) { ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); SPI_SEND(priv->spi, dta1); SPI_SEND(priv->spi, dta2); ssd1680_select(priv, false); } static void ssd1680_snd_cmd_with_data3(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1, uint8_t dta2, uint8_t dta3) { ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); SPI_SEND(priv->spi, dta1); SPI_SEND(priv->spi, dta2); SPI_SEND(priv->spi, dta3); ssd1680_select(priv, false); } static void ssd1680_snd_cmd_with_data4(FAR struct ssd1680_dev_s *priv, uint8_t cmd, uint8_t dta1, uint8_t dta2, uint8_t dta3, uint8_t dta4) { ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); SPI_SEND(priv->spi, dta1); SPI_SEND(priv->spi, dta2); SPI_SEND(priv->spi, dta3); SPI_SEND(priv->spi, dta4); ssd1680_select(priv, false); } static void ssd1680_snd_cmd_with_data(FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta, int dta_len) { ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); SPI_SNDBLOCK(priv->spi, dta, dta_len); ssd1680_select(priv, false); } #if !defined(CONFIG_LCD_PORTRAIT) && !defined(CONFIG_LCD_RPORTRAIT) static void ssd1680_snd_cmd_with_data_bitstrip( FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta, int nopix, int strip_len) # if SSD1680_DEV_BPP == 1 { int i; int j; uint8_t bytes[8]; uint8_t val; # if defined(CONFIG_LCD_LANDSCAPE) const int offset = (SSD1680_DEV_ROWSIZE * SSD1680_PDV - SSD1680_DEV_NATIVE_YRES) % SSD1680_PDV; dta += (strip_len - 1); # endif ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); while (nopix > 0) { for (j = 0; j < 8; j++) { # if defined(CONFIG_LCD_LANDSCAPE) if (offset == 0) { bytes[j] = *(dta + j * strip_len); } else { bytes[j] = (*(dta + j * strip_len)) >> offset; bytes[j] |= ((*(dta + j * strip_len - 1)) << (8 - offset) & (0xff << (8 - offset))); } # else bytes[j] = *(dta + j * strip_len); # endif } for (i = 0; i < 8; i++) { val = 0; for (j = 0; j < 8; j++) { # if defined(CONFIG_LCD_LANDSCAPE) val |= ((bytes[j] << (7 - j)) & (1 << (7 - j))); bytes[j] = bytes[j] >> 1; # else val |= ((bytes[j] >> j) & (1 << (7 - j))); bytes[j] = bytes[j] << 1; # endif } SPI_SEND(priv->spi, val); nopix--; if (nopix == 0) { break; } } # if defined(CONFIG_LCD_LANDSCAPE) dta--; # else dta++; # endif } ssd1680_select(priv, false); } # else { int i; int j; uint8_t rows[8]; uint16_t tmp[8]; uint8_t val; # if defined(CONFIG_LCD_LANDSCAPE) dta += (strip_len - 1); # endif ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); while (nopix > 0) { for (j = 0; j < 8; j++) { # if defined(CONFIG_LCD_LANDSCAPE) tmp = *(dta + j * strip_len) + ((*(dta + j * strip_len + 1)) << 8); # else tmp = *(dta + j * strip_len + 1) + ((*(dta + j * strip_len)) << 8); # endif rows[j] = (tmp & 0x01) | ((tmp >> 1) & 0x02) | ((tmp >> 2) & 0x04) | ((tmp >> 3) & 0x08) | ((tmp >> 4) & 0x10) | ((tmp >> 5) & 0x20) | ((tmp >> 6) & 0x40) | ((tmp >> 7) & 0x80); } for (i = 0; i < 8; i++) { val = 0; for (j = 0; j < 8; j++) { # if defined(CONFIG_LCD_LANDSCAPE) val |= ((rows[j] << (7 - j)) & (1 << (7 - j))); rows[j] = rows[j] >> 1; # else val |= ((rows[j] >> (j)) & (1 << (7 - j))); rows[j] = rows[j] << 1; # endif } SPI_SEND(priv->spi, val); nopix--; if (nopix == 0) { break; } } # if defined(CONFIG_LCD_LANDSCAPE) dta--; # else dta++; # endif } ssd1680_select(priv, false); } static void ssd1680_snd_cmd_with_data_odd_bits_bitstrip( FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta, int nopix, int strip_len) { int i; int j; uint16_t rows[8]; uint8_t val; #if defined(CONFIG_LCD_LANDSCAPE) dta += (strip_len - 1); #endif ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); while (nopix > 0) { for (j = 0; j < 8; j++) { #if defined(CONFIG_LCD_LANDSCAPE) rows[j] = *(dta + j * strip_len) + ((*(dta + j * strip_len + 1)) << 8); #else rows[j] = *(dta + j * strip_len + 1) + ((*(dta + j * strip_len)) << 8); #endif } for (i = 0; i < 8; i++) { val = 0; for (j = 0; j < 8; j++) { #if defined(CONFIG_LCD_LANDSCAPE) val |= ((rows[j] << (7 - j)) & (1 << (7 - j))); rows[j] = rows[j] >> 2; #else val |= ((rows[j] >> (j)) & (1 << (7 - j))); rows[j] = rows[j] << 2; #endif } SPI_SEND(priv->spi, val); nopix--; if (nopix == 0) { break; } } #if defined(CONFIG_LCD_LANDSCAPE) dta--; #else dta++; #endif } ssd1680_select(priv, false); } # endif #endif #if SSD1680_DEV_BPP == 2 static void ssd1680_snd_cmd_with_data_even_bits( FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta, int dta_len) { int i; uint8_t dta_byte; uint8_t src1; uint8_t src2; ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); for (i = 0; i < dta_len; i++) { src1 = *(dta++); src2 = *(dta++); dta_byte = (src1 & 0x01) | ((src1 >> 1) & 0x02) | ((src1 >> 2) & 0x04) | ((src1 >> 3) & 0x08) | ((src2 << 4) & 0x10) | ((src2 << 3) & 0x20) | ((src2 << 2) & 0x40) | ((src2 << 1) & 0x80); SPI_SEND(priv->spi, dta_byte); } ssd1680_select(priv, false); } static void ssd1680_snd_cmd_with_data_odd_bits( FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta, int dta_len) { int i; uint8_t dta_byte; uint8_t src1; uint8_t src2; ssd1680_select(priv, true); ssd1680_cmddata(priv, true); SPI_SEND(priv->spi, cmd); ssd1680_cmddata(priv, false); for (i = 0; i < dta_len; i++) { src1 = *(dta++); src2 = *(dta++); dta_byte = ((src1 >> 1 & 0x01)) | ((src1 >> 2) & 0x02) | ((src1 >> 3) & 0x04) | ((src1 >> 4) & 0x08) | ((src2 << 3) & 0x10) | ((src2 << 2) & 0x20) | ((src2 << 1) & 0x40) | (src2 & 0x80); SPI_SEND(priv->spi, dta_byte); } ssd1680_select(priv, false); } #endif /**************************************************************************** * Name: ssd1680_cmddata * * Description: * Select Command/Data mode for SSD1680 * ****************************************************************************/ inline static void ssd1680_cmddata(FAR struct ssd1680_dev_s *priv, bool cmd) { SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY(0), cmd); } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: ssd1680_initialize * * Description: * Initialize the 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: * * dev - A reference to the SPI driver instance. * board_priv - Board specific structure. * * 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 *ssd1680_initialize(FAR struct spi_dev_s *dev, FAR const struct ssd1680_priv_s *board_priv) { int ret; FAR struct ssd1680_dev_s *priv = &g_epaperdev; DEBUGASSERT(dev); priv->dev = g_lcd_epaper_dev; priv->on = false; priv->is_conf = false; /* Register board specific functions */ priv->board_priv = board_priv; priv->spi = dev; /* Configure the SPI */ ssd1680_configspi(priv->spi); /* Initialize the framebuffer */ memset(priv->shadow_fb, SSD1680_Y1_BLACK & 1 ? 0xff : 0x00, SSD1680_DEV_FBSIZE); /* Power on and configure display */ ret = ssd1680_setpower(&priv->dev, true); if (ret != OK) { return NULL; } return &priv->dev; } static FAR void *bitscpy_ds(FAR void *dest, int dest_offset, FAR const void *src, size_t nbits) { FAR unsigned char *pout = (FAR unsigned char *)dest; FAR unsigned char *pin = (FAR unsigned char *)src; uint8_t val; uint8_t mask; /* Copy block of bytes */ while (nbits >= 8) { /* Read. MSB is first */ val = *pin++; /* Write */ if (dest_offset == 0) { *pout++ = val; } else { mask = 0xff >> dest_offset; *pout &= ~mask; *pout |= (val >> dest_offset); pout++; mask = (0xff << (8 - dest_offset)) & 0xff; *pout &= ~mask; *pout |= (val << (8 - dest_offset)); /* no need to & mask */ } nbits -= 8; } /* Copy last bits 1-7 */ if (nbits > 0) { val = *pin; if (nbits + dest_offset <= 8) { mask = ((0xff << (8 - nbits)) & 0xff) >> dest_offset; *pout &= ~mask; *pout |= ((val >> dest_offset) & mask); } else { mask = 0xff >> dest_offset; *pout &= ~mask; *pout |= (val >> dest_offset); pout++; nbits -= (8 - dest_offset); mask = 0xff << (8 - nbits); *pout &= ~mask; *pout |= ((val << (8 - dest_offset)) & mask); } } return dest; } static FAR void *bitscpy_ss(FAR void *dest, FAR const void *src, int src_offset, size_t nbits) { FAR unsigned char *pout = (FAR unsigned char *)dest; FAR unsigned char *pin = (FAR unsigned char *)src; uint8_t val; /* Copy block of bytes */ while (nbits >= 8) { /* Read. MSB is first */ if (src_offset == 0) { val = *pin++; } else { val = ((*pin) << src_offset); pin++; val |= ((*pin) >> (8 - src_offset)); } /* Write */ *pout++ = val; nbits -= 8; } /* Copy last bits 1-7 */ if (nbits > 0) { val = ((*pin) << src_offset); if (nbits + src_offset > 8) { pin++; val |= ((*pin & (~(0xff >> (nbits + src_offset - 8)) >> (8 - src_offset)))); } *pout &= (~((0xff << (8 - nbits)))); *pout |= (val & (0xff << (8 - nbits))); } return dest; } #endif /* CONFIG_LCD_SSD1680 */