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nuttx/drivers/lcd/ssd1680.c
Adam Kaliszan 7e6d93da4d Support for 2.13 inch display v2
2022-06-28 23:41:11 +08:00

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/****************************************************************************
* 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 <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/spi/spi.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/ssd1680.h>
#include <nuttx/signal.h>
#include <arch/irq.h>
#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 */
FAR void *bitscpy_ds(FAR void *dest, int dest_offset, FAR const void *src,
size_t nbits);
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);
/* 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(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 */
.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.
* If npixels = 0 then do redraw e-ink screen. If range:
* 0 < npixels <= xres-col then update displays memory
*
****************************************************************************/
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;
/* TODO Special IOCTL function in lcd_framebuf has to be implemented.
* Those function would call ssd1680_putrun with npixels = 0
*/
if (npixels == 0)
{
ssd1680_redraw_display(priv);
return OK;
}
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);
/* Write data to memory of display driver */
ssd1680_update_row(priv, row);
/* TODO Remove it after IOCTL refresh implementation */
if (row == SSD1680_DEV_FB_YRES / 2)
{
ssd1680_redraw_display(priv);
}
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)
{
lcdinfo("(%d, %d, %d)\n", row, col, 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;
}
/****************************************************************************
* 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)
{
return ret;
}
/* Draw the framebuffer */
ret = ssd1680_update_all(priv);
}
if (ret < 0)
{
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 postion 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 postion */
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
*
* Description:
* Redraw full framebuffer to 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(struct ssd1680_dev_s *priv)
{
int row;
for (row = 0; row < SSD1680_DEV_FB_YRES; row++)
{
ssd1680_update_row(priv, row);
}
ssd1680_redraw_display(priv);
return OK;
}
static int ssd1680_redraw_display(struct ssd1680_dev_s *priv)
{
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("Timout. 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)
#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 nopix, int strip_len)
{
int i;
int j;
uint8_t bytes[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++)
{
bytes[j] = *(dta + j * strip_len);
}
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;
#elif
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--;
#elif
dta++;
#endif
}
ssd1680_select(priv, false);
}
#else
static void ssd1680_snd_cmd_with_data_even_bits_bitstrip(
FAR struct ssd1680_dev_s *priv, uint8_t cmd, const uint8_t *dta,
int nopix, int strip_len)
{
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;
#elif
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--;
#elif
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;
#elif
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--;
#elif
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;
}
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;
/* Copy block of bytes */
while (nbits >= 8)
{
/* Read. MSB is first */
val = *pin++;
/* Write */
if (dest_offset == 0)
{
*pout++ = val;
}
else
{
*pout &= (~(0xff >> dest_offset));
*pout |= (val >> dest_offset);
pout++;
*pout &= ~(0xff << (8 - dest_offset));
*pout |= (val << (8 - dest_offset));
}
nbits -= 8;
}
/* Copy last bits 1-7 */
if (nbits > 0)
{
val = *pin;
if (nbits + dest_offset <= 8)
{
*pout &= (~((0xff << (8 - nbits)) >> dest_offset));
*pout |= (val & (0xff << (8 - nbits)) >> dest_offset);
}
else
{
*pout &= (~(0xff >> dest_offset));
*pout |= (val >> dest_offset);
pout++;
nbits -= (8 - dest_offset);
*pout &= ~(0xff << (8 - nbits));
*pout |= ((val << (8 - dest_offset)) & (0xff << (8 - nbits)));
}
}
return dest;
}
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 */
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