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nuttx/drivers/lcd/ssd1351.c
Paul A. Patience 01b68e90d0 Add SSD1351 OLED controller support
2015-08-28 18:37:01 -04:00

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/****************************************************************************
* drivers/lcd/ssd1351.c
* LCD driver for the Solomon Systech SSD1351 LCD controller
*
* Copyright (C) 2015 Omni Hoverboards Inc. All rights reserved.
* Author: Paul Alexander Patience <paul-a.patience@polymtl.ca>
*
* 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 <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/spi/spi.h>
#include <nuttx/lcd/lcd.h>
#include <nuttx/lcd/ssd1351.h>
#ifdef CONFIG_LCD_SSD1351
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* SSD1351 configuration settings:
* CONFIG_SSD1351_SPI3WIRE - 3-wire SPI interface
* CONFIG_SSD1351_SPI4WIRE - 4-wire SPI interface
* CONFIG_SSD1351_SPIMODE - SPI mode
* CONFIG_SSD1351_SPIFREQ - SPI frequency
* CONFIG_SSD1351_NINTERFACES - number of physical devices supported
* CONFIG_SSD1351_XRES - X resolution
* CONFIG_SSD1351_YRES - Y resolution
* CONFIG_SSD1351_MIRRORX - mirror along the X axis
* CONFIG_SSD1351_MIRRORY - mirror along the Y axis
* CONFIG_SSD1351_INVERT - invert the display
* CONFIG_SSD1351_VDDEXT - external VDD
* CONFIG_SSD1351_TRST - reset period
* CONFIG_SSD1351_TPRECHG1 - first pre-charge period
* CONFIG_SSD1351_PERFENHANCE - enhace display performance
* CONFIG_SSD1351_CLKDIV - clock divider
* CONFIG_SSD1351_OSCFREQ - oscillator frequency
* CONFIG_SSD1351_TPRECHG2 - second pre-charge period
* CONFIG_SSD1351_VPRECHG - pre-charge voltage level
* CONFIG_SSD1351_VCOMH - COM deselect voltage level
* CONFIG_SSD1351_CONTRASTA - color A contrast
* CONFIG_SSD1351_CONTRASTB - color B contrast
* CONFIG_SSD1351_CONTRASTC - color C contrast
* CONFIG_SSD1351_MSTRCONTRAST - master contrast ratio
*
* Required LCD driver settings:
* CONFIG_LCD_SSD1351 - enables SSD1351 support
* CONFIG_LCD_MAXPOWER - maximum power, must be 1
*
* Additional LCD driver settings:
* CONFIG_LCD_LANDSCAPE - landscape
* CONFIG_LCD_RLANDSCAPE - reverse landscape
* CONFIG_LCD_PORTRAIT - portrait
* CONFIG_LCD_RPORTRAIT - reverse portrait
*
* Required SPI driver settings:
* CONFIG_SPI - enables support for SPI
* CONFIG_SPI_CMDDATA - enables support for cmd/data selection
* (if using 4-wire SPI)
*
* NX settings that must be undefined:
* CONFIG_NX_DISABLE_16BPP - disables 16 bpp support
*/
/* Verify that all configuration requirements have been met */
/* Interface to use */
#if !defined(CONFIG_SSD1351_SPI3WIRE) && !defined(CONFIG_SSD1351_SPI4WIRE)
# error "Choose an interface to use"
#endif
#if defined(CONFIG_SSD1351_SPI3WIRE) && defined(CONFIG_SSD1351_SPI4WIRE)
# error "Cannot choose more than one interface"
#endif
/* SPI */
#ifndef CONFIG_SPI
# error "Requires support for SPI"
#endif
/* Cmd/data selection */
#if defined(CONFIG_SSD1351_SPI4WIRE) && !defined(CONFIG_SPI_CMDDATA)
# error "4-wire SPI interface requires support for SPI_CMDDATA"
#endif
/* Number of bits per pixel */
#ifdef CONFIG_NX_DISABLE_16BPP
# error "Requires support for 16 bits per pixel"
#endif
/* Max power */
#ifndef CONFIG_LCD_MAXPOWER
# define CONFIG_LCD_MAXPOWER 1
#endif
#if CONFIG_LCD_MAXPOWER != 1
# error "CONFIG_LCD_MAXPOWER should be 1"
#endif
/* SPI mode */
#ifndef CONFIG_SSD1351_SPIMODE
# define CONFIG_SSD1351_SPIMODE SPIDEV_MODE0
#endif
/* SPI frequency */
#ifndef CONFIG_SSD1351_SPIFREQ
# define CONFIG_SSD1351_SPIFREQ 1000000
#endif
/* The number of physical interfaces that will be supported */
#ifndef CONFIG_SSD1351_NINTERFACES
# define CONFIG_SSD1351_NINTERFACES 1
#endif
#if CONFIG_SSD1351_NINTERFACES != 1
# error "This implementation supports only a single LCD device"
#endif
/* X resolution */
#ifndef CONFIG_SSD1351_XRES
# define CONFIG_SSD1351_XRES 128
#endif
#if CONFIG_SSD1351_XRES < 0 || CONFIG_SSD1351_XRES > 128
# error "Invalid X resolution"
#endif
/* Y resolution */
#ifndef CONFIG_SSD1351_YRES
# define CONFIG_SSD1351_YRES 128
#endif
#if CONFIG_SSD1351_YRES < 0 || CONFIG_SSD1351_YRES > 128
# error "Invalid Y resolution"
#endif
/* Reset period */
#ifndef CONFIG_SSD1351_TRST
# define CONFIG_SSD1351_TRST 5
#endif
/* First pre-charge period */
#ifndef CONFIG_SSD1351_TPRECHG1
# define CONFIG_SSD1351_TPRECHG1 8
#endif
/* Clock divider */
#ifndef CONFIG_SSD1351_CLKDIV
# define CONFIG_SSD1351_CLKDIV 0
#endif
/* Oscillator frequency */
#ifndef CONFIG_SSD1351_OSCFREQ
# define CONFIG_SSD1351_OSCFREQ 15
#endif
/* Second pre-charge period */
#ifndef CONFIG_SSD1351_TPRECHG2
# define CONFIG_SSD1351_TPRECHG2 8
#endif
/* Pre-charge voltage level */
#ifndef CONFIG_SSD1351_VPRECHG
# define CONFIG_SSD1351_VPRECHG 50
#endif
/* COM deselect voltage level */
#ifndef CONFIG_SSD1351_VCOMH
# define CONFIG_SSD1351_VCOMH 82
#endif
/* Color A contrast */
#ifndef CONFIG_SSD1351_CONTRASTA
# define CONFIG_SSD1351_CONTRASTA 138
#endif
/* Color B contrast */
#ifndef CONFIG_SSD1351_CONTRASTB
# define CONFIG_SSD1351_CONTRASTB 81
#endif
/* Color C contrast */
#ifndef CONFIG_SSD1351_CONTRASTC
# define CONFIG_SSD1351_CONTRASTC 138
#endif
/* Master contrast ratio */
#ifndef CONFIG_SSD1351_MSTRCONTRAST
# define CONFIG_SSD1351_MSTRCONTRAST 16
#endif
/* 9-bit SPI */
#ifdef CONFIG_SSD1351_SPI3WIRE
# define SSD1351_SPICMD 0
# define SSD1351_SPIDATA (1 << 8)
#endif
/* Macro Helpers ************************************************************/
#define SSD1351_MAX(a, b) ((a) > (b) ? (a) : (b))
#define SSD1351_MIN(a, b) ((a) < (b) ? (a) : (b))
#define SSD1351_CLAMP(n, a, b) SSD1351_MIN(SSD1351_MAX(n, a), b)
/* Fundamental Commands *****************************************************/
/* Set column address. Two data bytes.
* Data 1: start address (0-127)
* Data 2: end address (0-127)
*/
#define SSD1351_CMD_COLADDR 0x15
/* Set row address. Two data bytes.
* Data 1: start address (0-127)
* Data 2: end address (0-127)
*/
#define SSD1351_CMD_ROWADDR 0x75
/* Write data bytes to RAM. */
#define SSD1351_CMD_RAMWRITE 0x5c
/* Read data bytes from RAM. */
#define SSD1351_CMD_RAMREAD 0x5d
/* Set address increment, column address mapping, color sequence,
* scan direction, COM split, and color depth.
* One data byte.
*/
#define SSD1351_CMD_ORIENTATION 0xa0
#define SSD1351_ADDRINCHORIZ 0x00 /* Horizontal address increment */
#define SSD1351_ADDRINCVERT 0x01 /* Vertical address increment */
#define SSD1351_REMAPCOL0 0x00 /* Column address 0 mapped to SEG0 */
#define SSD1351_REMAPCOL127 0x02 /* Column address 127 mapped to SEG0 */
#define SSD1351_COLORABC 0x00 /* Color sequence ABC */
#define SSD1351_COLORCBA 0x04 /* Color sequence CBA */
#define SSD1351_SCANFROMCOM0 0x00 /* Scan from COM0 */
#define SSD1351_SCANTOCOM0 0x10 /* Scan to COM0 */
#define SSD1351_SPLITDIS 0x00 /* Disable COM split odd even */
#define SSD1351_SPLITEN 0x20 /* Enable COM split odd even */
#define SSD1351_DEPTH65K 0x00 /* 65k color depth */
#define SSD1351_DEPTH262K1 0x80 /* 262k color depth format 1 */
#define SSD1351_DEPTH262K2 0xc0 /* 262k color depth format 2 */
/* Set vertical scroll by RAM (0-128). One data byte. */
#define SSD1351_CMD_STARTLINE 0xa1
#define SSD1351_STARTLINE(n) SSD1351_CLAMP(n, 0, 128)
/* Set vertical scroll by row (0-128). One data byte. */
#define SSD1351_CMD_OFFSET 0xa2
#define SSD1351_OFFSET(n) SSD1351_CLAMP(n, 0, 128)
/* Set all pixels off. No data bytes. */
#define SSD1351_CMD_ALLOFF 0xa4
/* Set all pixels on. No data bytes. */
#define SSD1351_CMD_ALLON 0xa5
/* Set normal display. No data bytes. */
#define SSD1351_CMD_NORMAL 0xa6
/* Set inverse display. No data bytes. */
#define SSD1351_CMD_INVERSE 0xa7
/* Set VDD and interface. One data byte. */
#define SSD1351_CMD_VDDIFACE 0xab
#define SSD1351_VDDEXT 0x00 /* external VDD */
#define SSD1351_VDDINT 0x01 /* internal VDD */
#define SSD1351_IFACE8BIT 0x00 /* 8-bit parallel */
#define SSD1351_IFACE16BIT 0x40 /* 16-bit parallel */
#define SSD1351_IFACE18BIT 0xc0 /* 18-bit parallel */
/* Set display off (sleep mode on). No data bytes. */
#define SSD1351_CMD_DISPOFF 0xae
/* Set display on (sleep mode off). No data bytes. */
#define SSD1351_CMD_DISPON 0xaf
/* Set reset period in DCLKs (5-31) and first pre-charge period
* in DCLKs (3-15). One data byte.
*/
#define SSD1351_CMD_TRSTTPRECHG1 0xb1
#define SSD1351_TRST(n) (SSD1351_CLAMP(n, 5, 31) / 2)
#define SSD1351_TPRECHG1(n) (SSD1351_CLAMP(n, 3, 15) << 4)
/* Set display performance. Three data bytes. */
#define SSD1351_CMD_PERF 0xb2
#define SSD1351_PERFNORMAL 0x00 /* Data 1: normal performance */
#define SSD1351_PERFENHANCED 0xa4 /* Data 1: enhanced performance */
#define SSD1351_PERFDATA2 0x00
#define SSD1351_PERFDATA3 0x00
/* Set clock divider (0-10) and oscillator frequency (0-15).
* One data byte.
*/
#define SSD1351_CMD_DIVFREQ 0xb3
#define SSD1351_CLKDIV(r) (SSD1351_CLAMP(r, 0, 10) << 0)
#define SSD1351_OSCFREQ(r) (SSD1351_CLAMP(r, 0, 15) << 4)
/* Set segment low voltage. Three data bytes. */
#define SSD1351_CMD_VSL 0xb4
#define SSD1351_VSLEXT 0xa0 /* Data 1: external VSL */
#define SSD1351_VSLDATA2 0xb5
#define SSD1351_VSLDATA3 0x55
/* Set GPIO pins. One data byte. */
#define SSD1351_CMD_GPIO 0xb5
#define SSD1351_GPIODIS 0x00 /* High impedance, disabled */
#define SSD1351_GPIOEN 0x01 /* High impedance, enabled */
#define SSD1351_GPIOLOW 0x02 /* Output low */
#define SSD1351_GPIOHIGH 0x03 /* Output high */
#define SSD1351_GPIO0(n) (((n) & 3) << 0)
#define SSD1351_GPIO1(n) (((n) & 3) << 2)
/* Set second pre-charge period in DCLKs (1-15). One data byte. */
#define SSD1351_CMD_TPRECHG2 0xb6
#define SSD1351_TPRECHG2(n) SSD1351_CLAMP(n, 1, 15)
/* Set lookup table for grayscale pulse width. 63 data bytes. */
#define SSD1351_CMD_LUT 0xb8
/* Use built-in linear lookup table. No data bytes. */
#define SSD1351_CMD_LINEARLUT 0xb9
/* Set pre-charge voltage level as a percentage of VCC (20-60).
* One data byte.
*/
#define SSD1351_CMD_VPRECHG 0xbb
#define SSD1351_VPRECHG(n) (100 * (SSD1351_CLAMP(n, 20, 60) - 20) / \
(100 * (60 - 20) / 31))
/* Set COM deselect voltage level as a percentage of VCC (72-86).
* One data byte.
*/
#define SSD1351_CMD_VCOMH 0xbe
#define SSD1351_VCOMH(n) ((SSD1351_CLAMP(n, 72, 86) - 72) / 2)
/* Set contrast for colors A (0-255), B (0-255), and C (0-255).
* Three data bytes.
* Data 1: color A
* Data 2: color B
* Data 3: color C
*/
#define SSD1351_CMD_CONTRAST 0xc1
#define SSD1351_CONTRAST(n) SSD1351_CLAMP(n, 0, 255)
/* Set master contrast ratio in sixteenths (1-16). One data byte. */
#define SSD1351_CMD_MSTRCONTRAST 0xc7
#define SSD1351_MSTRCONTRAST(n) (SSD1351_CLAMP(n, 1, 16) - 1)
/* Set multiplex ratio (16-128). One data byte. */
#define SSD1351_CMD_MUXRATIO 0xca
#define SSD1351_MUXRATIO(n) (SSD1351_CLAMP(n, 16, 128) - 1)
/* Set command lock. One data byte. */
#define SSD1351_CMD_LOCK 0xfd
#define SSD1351_UNLOCK 0x12 /* Unlock commands */
#define SSD1351_LOCK 0x16 /* Lock commands */
#define SSD1351_INACCESSIBLE 0xb0 /* Make some commands inaccessible */
#define SSD1351_ACCESSIBLE 0xb1 /* Make some commands accessible */
/* Graphic Acceleration Commands ********************************************/
/* Set horizontal scroll. Five data bytes.
* Data 1: 0x00: no scrolling
* 0x01-0x3f: scroll towards SEG127 with 1 column offset
* 0x40-0xff: scroll towards SEG0 with 1 column offset
* Data 2: start row address
* Data 3: number of rows to scroll
*/
#define SSD1351_CMD_HSCROLL 0x96
#define SSD1351_HSCROLLDATA4 0x00 /* Data 4 */
#define SSD1351_HSCROLLTEST 0x00 /* Data 5: test mode */
#define SSD1351_HSCROLLNORMAL 0x01 /* Data 5: normal */
#define SSD1351_HSCROLLSLOW 0x02 /* Data 5: slow */
#define SSD1351_HSCROLLSLOWEST 0x03 /* Data 5: slowest */
/* Start horizontal scroll. No data bytes. */
#define SSD1351_CMD_STARTHSCROLL 0x9e
/* Stop horizontal scroll. No data bytes. */
#define SSD1351_CMD_STOPHSCROLL 0x9f
/* Color Properties *********************************************************/
/* Display resolution */
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
#define SSD1351_XRES CONFIG_SSD1351_XRES
#define SSD1351_YRES CONFIG_SSD1351_YRES
#else
#define SSD1351_XRES CONFIG_SSD1351_YRES
#define SSD1351_YRES CONFIG_SSD1351_XRES
#endif
/* Color depth and format */
#define SSD1351_BPP 16
#define SSD1351_COLORFMT FB_FMT_RGB16_565
#define SSD1351_STRIDE (2 * SSD1351_XRES)
#define SSD1351_PIX2BYTES(p) (2 * (p))
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure describes the state of this driver */
struct ssd1351_dev_s
{
/* Publically visible device structure */
struct lcd_dev_s dev;
/* Private LCD-specific information follows */
FAR struct spi_dev_s *spi; /* Contained SPI driver instance */
uint8_t power; /* Current power (backlight) setting */
/* This is working memory allocated by the LCD driver for each LCD device
* and for each color plane. This memory will hold one raster line of
* data. The size of the allocated run buffer must therefore be at least
* (bpp * xres / 8). Actual alignment of the buffer must conform to the
* bitwidth of the underlying pixel type.
*
* If there are multiple planes, they may share the same working buffer
* because different planes will not be operate on concurrently. However,
* if there are multiple LCD devices, they must each have unique run
* buffers.
*/
uint16_t runbuffer[SSD1351_XRES];
/* This is another buffer, but used internally by the LCD driver in order
* to expand the pixel data into 9-bit data needed by the LCD. There are
* some customizations that would eliminate the need for this extra buffer
* and for the extra expansion/copy, but those customizations would require
* a special, non-standard SPI driver that could expand 8- to 9-bit data on
* the fly.
*/
#ifdef CONFIG_SSD1351_SPI3WIRE
uint16_t rowbuffer[SSD1351_STRIDE+1];
#endif
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* SPI Helpers */
static inline void ssd1351_configspi(FAR struct spi_dev_s *spi);
#ifdef CONFIG_SPI_OWNBUS
static inline void ssd1351_select(FAR struct spi_dev_s *spi);
static inline void ssd1351_deselect(FAR struct spi_dev_s *spi);
#else
static void ssd1351_select(FAR struct spi_dev_s *spi);
static void ssd1351_deselect(FAR struct spi_dev_s *spi);
#endif
static void ssd1351_cmddata(FAR struct ssd1351_dev_s *priv, uint8_t cmd,
FAR const uint8_t *data, size_t datlen);
/* LCD Data Transfer Methods */
static int ssd1351_putrun(fb_coord_t row, fb_coord_t col,
FAR const uint8_t *buffer, size_t npixels);
static int ssd1351_getrun(fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer, size_t npixels);
/* LCD Configuration */
static int ssd1351_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int ssd1351_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 ssd1351_getpower(struct lcd_dev_s *dev);
static int ssd1351_setpower(struct lcd_dev_s *dev, int power);
static int ssd1351_getcontrast(struct lcd_dev_s *dev);
static int ssd1351_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
/* Initialization */
static inline void ssd1351_hwinitialize(FAR struct ssd1351_dev_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
/* This is the standard, NuttX LCD driver object */
static struct ssd1351_dev_s g_lcddev;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ssd1351_configspi
*
* Description:
* Configure the SPI.
*
****************************************************************************/
static inline void ssd1351_configspi(FAR struct spi_dev_s *spi)
{
SPI_SETMODE(spi, CONFIG_SSD1351_SPIMODE);
#ifdef CONFIG_SSD1351_SPI3WIRE
SPI_SETBITS(spi, 9);
#else
SPI_SETBITS(spi, 8);
#endif
SPI_SETFREQUENCY(spi, CONFIG_SSD1351_SPIFREQ);
}
/****************************************************************************
* Name: ssd1351_select
*
* Description:
* Select the SPI, locking and re-configuring if necessary.
*
****************************************************************************/
#ifdef CONFIG_SPI_OWNBUS
static inline void ssd1351_select(FAR struct spi_dev_s *spi)
{
/* We own the SPI bus, so just select the chip */
gdbg("SELECTED\n");
SPI_SELECT(spi, SPIDEV_DISPLAY, true);
}
#else
static void ssd1351_select(FAR struct spi_dev_s *spi)
{
/* Select the chip, locking the SPI bus in case there are multiple devices
* competing for the SPI bus
*/
gdbg("SELECTED\n");
SPI_LOCK(spi, true);
SPI_SELECT(spi, SPIDEV_DISPLAY, true);
/* Now make sure that the SPI bus is configured for this device (it might
* have gotten configured for a different device while unlocked)
*/
ssd1351_configspi(spi);
}
#endif
/****************************************************************************
* Name: ssd1351_deselect
*
* Description:
* De-select the SPI.
*
****************************************************************************/
#ifdef CONFIG_SPI_OWNBUS
static inline void ssd1351_deselect(FAR struct spi_dev_s *spi)
{
/* We own the SPI bus, so just de-select the chip */
gdbg("DE-SELECTED\n");
SPI_SELECT(spi, SPIDEV_DISPLAY, false);
}
#else
static void ssd1351_deselect(FAR struct spi_dev_s *spi)
{
/* De-select the chip and relinquish the SPI bus */
gdbg("DE-SELECTED\n");
SPI_SELECT(spi, SPIDEV_DISPLAY, false);
SPI_LOCK(spi, false);
}
#endif
/****************************************************************************
* Name: ssd1351_cmddata
*
* Description:
* Send a 1-byte command followed by datlen data bytes.
*
****************************************************************************/
#ifdef CONFIG_SSD1351_SPI3WIRE
static void ssd1351_cmddata(FAR struct ssd1351_dev_s *priv, uint8_t cmd,
FAR const uint8_t *data, size_t datlen)
{
size_t i;
/* Sanity check */
DEBUGASSERT(priv != NULL);
DEBUGASSERT((data == NULL && datlen == 0) || (data != NULL && datlen > 0));
DEBUGASSERT(datlen <= SSD1351_STRIDE);
/* Copy the command into the line buffer */
priv->rowbuffer[0] = (uint16_t)cmd | SSD1351_SPICMD;
/* Copy any data after the command into the line buffer */
for (i = 0; i < datlen; i++)
{
priv->rowbuffer[i+1] = (uint16_t)data[i] | SSD1351_SPIDATA;
}
/* Send the line buffer */
(void)SPI_SNDBLOCK(priv->spi, priv->rowbuffer, datlen+1);
}
#else
static void ssd1351_cmddata(FAR struct ssd1351_dev_s *priv, uint8_t cmd,
FAR const uint8_t *data, size_t datlen)
{
/* Sanity check */
DEBUGASSERT(priv != NULL);
DEBUGASSERT((data == NULL && datlen == 0) || (data != NULL && datlen > 0));
/* Select command transfer */
(void)SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY, true);
/* Send the command */
(void)SPI_SEND(priv->spi, cmd);
/* Do we have any data to send? */
if (datlen > 0)
{
/* Yes, select data transfer */
(void)SPI_CMDDATA(priv->spi, SPIDEV_DISPLAY, false);
/* Transfer all of the data */
(void)SPI_SNDBLOCK(priv->spi, data, datlen);
}
}
#endif
/****************************************************************************
* Name: ssd1351_setcursor
*
* Description:
* Set the cursor position.
*
****************************************************************************/
static void ssd1351_setcursor(FAR struct ssd1351_dev_s *priv, uint8_t col,
uint8_t row)
{
uint8_t buf[2];
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
/* Set the column address to the column */
buf[0] = col;
buf[1] = SSD1351_XRES - 1;
ssd1351_cmddata(priv, SSD1351_CMD_COLADDR, buf, 2);
/* Set the row address to the row */
buf[0] = row;
buf[1] = SSD1351_YRES - 1;
ssd1351_cmddata(priv, SSD1351_CMD_ROWADDR, buf, 2);
#else
/* Set the column address to the row */
buf[0] = row;
buf[1] = SSD1351_YRES - 1;
ssd1351_cmddata(priv, SSD1351_CMD_COLADDR, buf, 2);
/* Set the row address to the column */
buf[0] = col;
buf[1] = SSD1351_XRES - 1;
ssd1351_cmddata(priv, SSD1351_CMD_ROWADDR, buf, 2);
#endif
}
/****************************************************************************
* Name: ssd1351_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* Input Parameters:
* 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 ssd1351_putrun(fb_coord_t row, fb_coord_t col,
FAR const uint8_t *buffer, size_t npixels)
{
FAR struct ssd1351_dev_s *priv = &g_lcddev;
/* Sanity check */
DEBUGASSERT(buffer != NULL && ((uintptr_t)buffer & 1) == 0 &&
col >= 0 && col+npixels <= SSD1351_XRES &&
row >= 0 && row < SSD1351_YRES);
/* Select and lock the device */
ssd1351_select(priv->spi);
/* Set the starting position for the run */
ssd1351_setcursor(priv, col, row);
/* Transfer all of the data */
ssd1351_cmddata(priv, SSD1351_CMD_RAMWRITE, buffer,
SSD1351_PIX2BYTES(npixels));
/* Unlock and de-select the device */
ssd1351_deselect(priv->spi);
return OK;
}
/****************************************************************************
* Name: ssd1351_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD.
*
* Input Parameters:
* row - Starting row to read from (range: 0 <= row < yres)
* col - Starting column to read from (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 ssd1351_getrun(fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer, size_t npixels)
{
return -ENOSYS;
}
/****************************************************************************
* Name: ssd1351_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
****************************************************************************/
static int ssd1351_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo)
{
DEBUGASSERT(dev != NULL && vinfo != NULL);
vinfo->fmt = SSD1351_COLORFMT;
vinfo->xres = SSD1351_XRES;
vinfo->yres = SSD1351_YRES;
vinfo->nplanes = 1;
gvdbg("fmt: %u xres: %u yres: %u nplanes: %u\n",
vinfo->fmt, vinfo->xres, vinfo->yres, vinfo->nplanes);
return OK;
}
/****************************************************************************
* Name: ssd1351_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
****************************************************************************/
static int ssd1351_getplaneinfo(FAR struct lcd_dev_s *dev,
unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev;
DEBUGASSERT(dev != NULL && pinfo != NULL && planeno == 0);
pinfo->putrun = ssd1351_putrun;
pinfo->getrun = ssd1351_getrun;
pinfo->buffer = (uint8_t *)priv->runbuffer;
pinfo->bpp = SSD1351_BPP;
gvdbg("planeno: %u bpp: %u\n", planeno, pinfo->bpp);
return OK;
}
/****************************************************************************
* Name: ssd1351_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 ssd1351_getpower(FAR struct lcd_dev_s *dev)
{
FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev;
/* Sanity check */
DEBUGASSERT(priv != NULL);
gvdbg("power: %d\n", priv->power);
return priv->power;
}
/****************************************************************************
* Name: ssd1351_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 ssd1351_setpower(FAR struct lcd_dev_s *dev, int power)
{
FAR struct ssd1351_dev_s *priv = (FAR struct ssd1351_dev_s *)dev;
/* Sanity check */
DEBUGASSERT(priv != NULL && (unsigned int)power <= CONFIG_LCD_MAXPOWER);
gvdbg("power: %d\n", power);
/* Select and lock the device */
ssd1351_select(priv->spi);
if (power > 0)
{
/* Turn the display on */
ssd1351_cmddata(priv, SSD1351_CMD_DISPON, NULL, 0);
priv->power = CONFIG_LCD_MAXPOWER;
}
else
{
/* Turn the display off */
ssd1351_cmddata(priv, SSD1351_CMD_DISPOFF, NULL, 0);
priv->power = 0;
}
/* Unlock and de-select the device */
ssd1351_deselect(priv->spi);
return OK;
}
/****************************************************************************
* Name: ssd1351_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int ssd1351_getcontrast(FAR struct lcd_dev_s *dev)
{
return -ENOSYS;
}
/****************************************************************************
* Name: ssd1351_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int ssd1351_setcontrast(FAR struct lcd_dev_s *dev,
unsigned int contrast)
{
return -ENOSYS;
}
/****************************************************************************
* Name: ssd1351_hwinitialize
*
* Description:
* Initialize the video hardware.
*
****************************************************************************/
static inline void ssd1351_hwinitialize(FAR struct ssd1351_dev_s *priv)
{
size_t i;
uint8_t buf[3];
/* Select and lock the device */
ssd1351_select(priv->spi);
/* Unlock most commands */
buf[0] = SSD1351_UNLOCK;
ssd1351_cmddata(priv, SSD1351_CMD_LOCK, buf, 1);
/* Unlock the rest of the commands */
buf[0] = SSD1351_ACCESSIBLE;
ssd1351_cmddata(priv, SSD1351_CMD_LOCK, buf, 1);
/* Turn the display off */
ssd1351_cmddata(priv, SSD1351_CMD_DISPOFF, NULL, 0);
/* Set the address increment, the column address mapping, the color
* sequence, the scan direction, the COM split, and the color depth
*/
buf[0] = SSD1351_COLORABC | SSD1351_SPLITEN | SSD1351_DEPTH65K;
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
buf[0] |= SSD1351_ADDRINCHORIZ;
#else
buf[0] |= SSD1351_ADDRINCVERT;
#endif
#if (defined(CONFIG_LCD_LANDSCAPE) && !defined(CONFIG_SSD1351_MIRRORX)) || \
(defined(CONFIG_LCD_RLANDSCAPE) && defined(CONFIG_SSD1351_MIRRORX)) || \
(defined(CONFIG_LCD_PORTRAIT) && !defined(CONFIG_SSD1351_MIRRORY)) || \
(defined(CONFIG_LCD_RPORTRAIT) && defined(CONFIG_SSD1351_MIRRORY))
buf[0] |= SSD1351_REMAPCOL0;
#else
buf[0] |= SSD1351_REMAPCOL127;
#endif
#if (defined(CONFIG_LCD_LANDSCAPE) && !defined(CONFIG_SSD1351_MIRRORY)) || \
(defined(CONFIG_LCD_RLANDSCAPE) && defined(CONFIG_SSD1351_MIRRORY)) || \
(defined(CONFIG_LCD_PORTRAIT) && defined(CONFIG_SSD1351_MIRRORX)) || \
(defined(CONFIG_LCD_RPORTRAIT) && !defined(CONFIG_SSD1351_MIRRORX))
buf[0] |= SSD1351_SCANTOCOM0;
#else
buf[0] |= SSD1351_SCANFROMCOM0;
#endif
ssd1351_cmddata(priv, SSD1351_CMD_ORIENTATION, buf, 1);
/* Set the vertical scroll by RAM */
#if (defined(CONFIG_LCD_LANDSCAPE) && !defined(CONFIG_SSD1351_MIRRORY)) || \
(defined(CONFIG_LCD_RLANDSCAPE) && defined(CONFIG_SSD1351_MIRRORY)) || \
(defined(CONFIG_LCD_PORTRAIT) && defined(CONFIG_SSD1351_MIRRORX)) || \
(defined(CONFIG_LCD_RPORTRAIT) && !defined(CONFIG_SSD1351_MIRRORX))
buf[0] = SSD1351_STARTLINE(CONFIG_SSD1351_YRES);
#else
buf[0] = SSD1351_STARTLINE(0);
#endif
ssd1351_cmddata(priv, SSD1351_CMD_STARTLINE, buf, 1);
/* Set the vertical scroll by row */
buf[0] = SSD1351_OFFSET(0);
ssd1351_cmddata(priv, SSD1351_CMD_OFFSET, buf, 1);
/* Set the display to normal or inverse */
#ifdef CONFIG_SSD1351_INVERT
ssd1351_cmddata(priv, SSD1351_CMD_INVERSE, NULL, 0);
#else
ssd1351_cmddata(priv, SSD1351_CMD_NORMAL, NULL, 0);
#endif
/* Set the VDD and the interface */
#ifdef CONFIG_SSD1351_VDDEXT
buf[0] = SSD1351_VDDEXT;
#else
buf[0] = SSD1351_VDDINT;
#endif
buf[0] |= SSD1351_IFACE8BIT;
ssd1351_cmddata(priv, SSD1351_CMD_VDDIFACE, buf, 1);
/* Set the reset period and the first pre-charge period */
buf[0] = SSD1351_TRST(CONFIG_SSD1351_TRST) |
SSD1351_TPRECHG1(CONFIG_SSD1351_TPRECHG1);
ssd1351_cmddata(priv, SSD1351_CMD_TRSTTPRECHG1, buf, 1);
/* Set the display performance */
#ifdef CONFIG_SSD1351_PERFENHANCE
buf[0] = SSD1351_PERFENHANCE;
#else
buf[0] = SSD1351_PERFNORMAL;
#endif
buf[1] = SSD1351_PERFDATA2;
buf[2] = SSD1351_PERFDATA3;
ssd1351_cmddata(priv, SSD1351_CMD_PERF, buf, 3);
/* Set the clock divider and the oscillator frequency */
buf[0] = SSD1351_CLKDIV(CONFIG_SSD1351_CLKDIV) |
SSD1351_OSCFREQ(CONFIG_SSD1351_OSCFREQ);
ssd1351_cmddata(priv, SSD1351_CMD_DIVFREQ, buf, 1);
/* Set the segment low voltage */
buf[0] = SSD1351_VSLEXT;
buf[1] = SSD1351_VSLDATA2;
buf[2] = SSD1351_VSLDATA3;
ssd1351_cmddata(priv, SSD1351_CMD_VSL, buf, 3);
/* Set the GPIO pins */
buf[0] = SSD1351_GPIO0(SSD1351_GPIOLOW) | SSD1351_GPIO1(SSD1351_GPIOLOW);
ssd1351_cmddata(priv, SSD1351_CMD_GPIO, buf, 1);
/* Set the second pre-charge period */
buf[0] = SSD1351_TPRECHG2(CONFIG_SSD1351_TPRECHG2);
ssd1351_cmddata(priv, SSD1351_CMD_TPRECHG2, buf, 1);
/* Use the built-in linear lookup table */
ssd1351_cmddata(priv, SSD1351_CMD_LINEARLUT, NULL, 0);
/* Set the pre-charge voltage level */
buf[0] = SSD1351_VPRECHG(CONFIG_SSD1351_VPRECHG);
ssd1351_cmddata(priv, SSD1351_CMD_VPRECHG, buf, 1);
/* Set the COM deselect voltage level */
buf[0] = SSD1351_VCOMH(CONFIG_SSD1351_VCOMH);
ssd1351_cmddata(priv, SSD1351_CMD_VCOMH, buf, 1);
/* Set the contrast */
buf[0] = SSD1351_CONTRAST(CONFIG_SSD1351_CONTRASTA);
buf[1] = SSD1351_CONTRAST(CONFIG_SSD1351_CONTRASTB);
buf[2] = SSD1351_CONTRAST(CONFIG_SSD1351_CONTRASTC);
ssd1351_cmddata(priv, SSD1351_CMD_CONTRAST, buf, 3);
/* Set the master contrast ratio */
buf[0] = SSD1351_MSTRCONTRAST(CONFIG_SSD1351_MSTRCONTRAST);
ssd1351_cmddata(priv, SSD1351_CMD_MSTRCONTRAST, buf, 1);
/* Set the multiplex ratio */
buf[0] = SSD1351_MUXRATIO(128);
ssd1351_cmddata(priv, SSD1351_CMD_MUXRATIO, buf, 1);
/* Lock some of the commands */
buf[0] = SSD1351_INACCESSIBLE;
ssd1351_cmddata(priv, SSD1351_CMD_LOCK, buf, 1);
/* Set the cursor position */
ssd1351_setcursor(priv, 0, 0);
/* Clear the display memory */
buf[0] = 0;
buf[1] = 0;
for (i = 0; i < SSD1351_XRES * SSD1351_YRES; i++)
{
ssd1351_cmddata(priv, SSD1351_CMD_RAMWRITE, buf, 2);
}
/* Unlock and de-select the device */
ssd1351_deselect(priv->spi);
}
/****************************************************************************
* Name: ssd1351_initialize
*
* Description:
* Initialize the video hardware. The initial state of the device
* is fully initialized, display memory cleared, and 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_SSD1351_NINTERFACES-1.
* This allows support for multiple devices.
*
* Returned Value:
* On success, this function returns a reference to the LCD object for the
* specified device. NULL is returned on failure.
*
****************************************************************************/
FAR struct lcd_dev_s *ssd1351_initialize(FAR struct spi_dev_s *spi,
unsigned int devno)
{
FAR struct ssd1351_dev_s *priv = &g_lcddev;
size_t i;
uint16_t buf[SSD1351_XRES/2];
/* Sanity check */
DEBUGASSERT(spi != NULL && devno == 0);
/* Initialize the driver data structure */
priv->dev.getvideoinfo = ssd1351_getvideoinfo;
priv->dev.getplaneinfo = ssd1351_getplaneinfo;
priv->dev.getpower = ssd1351_getpower;
priv->dev.setpower = ssd1351_setpower;
priv->dev.getcontrast = ssd1351_getcontrast;
priv->dev.setcontrast = ssd1351_setcontrast;
priv->spi = spi;
priv->power = 0;
/* Configure the SPI bus if we own it. Otherwise, don't bother because
* it might change.
*/
#ifdef CONFIG_SPI_OWNBUS
ssd1351_configspi(spi);
#endif
/* Configure the device */
ssd1351_hwinitialize(priv);
ssd1351_setpower(&priv->dev, 1);
memset(buf, 0xff, sizeof(buf));
for (i = 0; i < SSD1351_YRES / 4; i++)
{
ssd1351_putrun(i, 0, (const uint8_t *)buf, SSD1351_XRES/2);
}
return &priv->dev;
}
#endif /* CONFIG_LCD_SSD1351 */
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