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incubator-nuttx/drivers/lcd/ssd1289.c

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/****************************************************************************
* drivers/lcd/ssd1289.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.
*
****************************************************************************/
/* Generic LCD driver for LCDs based on the Solomon Systech SSD1289 LCD
* controller.
* Think of this as a template for an LCD driver that you will probably have
* to customize for any particular LCD hardware.
*
* References: SSD1289, Rev 1.3, Apr 2007, Solomon Systech Limited
*/
/****************************************************************************
* 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/ssd1289.h>
#include "ssd1289.h"
#ifdef CONFIG_LCD_SSD1289
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* Check contrast selection */
#if !defined(CONFIG_LCD_MAXCONTRAST)
# define CONFIG_LCD_MAXCONTRAST 1
#endif
/* Check power setting */
#if !defined(CONFIG_LCD_MAXPOWER) || CONFIG_LCD_MAXPOWER < 1
# define CONFIG_LCD_MAXPOWER 1
#endif
#if CONFIG_LCD_MAXPOWER > 255
# error "CONFIG_LCD_MAXPOWER must be less than 256 to fit in uint8_t"
#endif
/* Check orientation */
#if defined(CONFIG_LCD_PORTRAIT)
# if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE) || defined(CONFIG_LCD_RPORTRAIT)
# error "Cannot define both portrait and any other orientations"
# endif
#elif defined(CONFIG_LCD_RPORTRAIT)
# if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
# error "Cannot define both rportrait and any other orientations"
# endif
#elif defined(CONFIG_LCD_LANDSCAPE)
# ifdef CONFIG_LCD_RLANDSCAPE
# error "Cannot define both landscape and any other orientations"
# endif
#elif !defined(CONFIG_LCD_RLANDSCAPE)
# define CONFIG_LCD_LANDSCAPE 1
#endif
/* Display/Color Properties *************************************************/
/* Display Resolution */
#if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
# define SSD1289_XRES 320
# define SSD1289_YRES 240
#else
# define SSD1289_XRES 240
# define SSD1289_YRES 320
#endif
/* Color depth and format */
#define SSD1289_BPP 16
#define SSD1289_COLORFMT FB_FMT_RGB16_565
/* LCD Profiles *************************************************************/
/* Many details of the controller initialization must, unfortunately, vary
* from LCD to LCD. I have looked at the spec and at three different drivers
* for LCDs that have SSD1289 controllers.
* I have tried to summarize these differences as "LCD profiles"
*
* Most of the differences between LCDs are nothing more than a few minor bit
* settings. The most significant difference between LCD drivers in is the
* manner in which the LCD is powered up and in how the power controls are
* set.
* My suggestion is that if you have working LCD initialization code, you
* should simply replace the code in ssd1289_hwinitialize with your working
* code.
*/
#if defined (CONFIG_SSD1289_PROFILE2)
# undef SSD1289_USE_SIMPLE_INIT
/* PWRCTRL1: AP=smalll-to-medium, DC=Flinex24, BT=+5/-4, DCT=Flinex24 */
# define PWRCTRL1_SETTING \
(SSD1289_PWRCTRL1_AP_SMMED | SSD1289_PWRCTRL1_DC_FLINEx24 | \
SSD1289_PWRCTRL1_BT_p5m4 | SSD1289_PWRCTRL1_DCT_FLINEx24)
/* PWRCTRL2: 5.1v */
# define PWRCTRL2_SETTING SSD1289_PWRCTRL2_VRC_5p1V
/* PWRCTRL3: x 2.165
* NOTE:
* Many drivers have bit 8 set which is not defined in the SSD1289 spec.
*/
# define PWRCTRL3_SETTING SSD1289_PWRCTRL3_VRH_x2p165
/* PWRCTRL4: VDV=9 + VCOMG */
# define PWRCTRL4_SETTING (SSD1289_PWRCTRL4_VDV(9) | SSD1289_PWRCTRL4_VCOMG)
/* PWRCTRL5: VCM=56 + NOTP */
# define PWRCTRL5_SETTING (SSD1289_PWRCTRL5_VCM(56) | SSD1289_PWRCTRL5_NOTP)
#elif defined (CONFIG_SSD1289_PROFILE3)
# undef SSD1289_USE_SIMPLE_INIT
/* PWRCTRL1: AP=smalll-to-medium, DC=Flinex24, BT=+5/-4, DCT=Flinex24 */
# define PWRCTRL1_SETTING \
(SSD1289_PWRCTRL1_AP_SMMED | SSD1289_PWRCTRL1_DC_FLINEx24 | \
SSD1289_PWRCTRL1_BT_p5m4 | SSD1289_PWRCTRL1_DCT_FLINEx24)
/* PWRCTRL2: 5.1v */
# define PWRCTRL2_SETTING SSD1289_PWRCTRL2_VRC_5p1V
/* PWRCTRL3: x 2.165
* NOTE:
* Many drivers have bit 8 set which is not defined in the SSD1289 spec.
*/
# define PWRCTRL3_SETTING SSD1289_PWRCTRL3_VRH_x2p165
/* PWRCTRL4: VDV=9 + VCOMG */
# define PWRCTRL4_SETTING (SSD1289_PWRCTRL4_VDV(9) | SSD1289_PWRCTRL4_VCOMG)
/* PWRCTRL5: VCM=56 + NOTP */
# define PWRCTRL5_SETTING (SSD1289_PWRCTRL5_VCM(56) | SSD1289_PWRCTRL5_NOTP)
#else /* if defined (CONFIG_SSD1289_PROFILE1) */
# undef SSD1289_USE_SIMPLE_INIT
# define SSD1289_USE_SIMPLE_INIT 1
/* PWRCTRL1: AP=medium-to-large, DC=Fosc/4, BT=+5/-4, DCT=Fosc/4 */
# define PWRCTRL1_SETTING \
(SSD1289_PWRCTRL1_AP_MEDLG | SSD1289_PWRCTRL1_DC_FOSd4 | \
SSD1289_PWRCTRL1_BT_p5m4 | SSD1289_PWRCTRL1_DCT_FOSd4)
/* PWRCTRL2: 5.3v */
# define PWRCTRL2_SETTING SSD1289_PWRCTRL2_VRC_5p3V
/* PWRCTRL3: x 2.570
* NOTE:
* Many drivers have bit 8 set which is not defined in the SSD1289 spec.
*/
# define PWRCTRL3_SETTING SSD1289_PWRCTRL3_VRH_x2p570
/* PWRCTRL4: VDV=12 + VCOMG */
# define PWRCTRL4_SETTING (SSD1289_PWRCTRL4_VDV(12) | SSD1289_PWRCTRL4_VCOMG)
/* PWRCTRL5: VCM=60 + NOTP */
# define PWRCTRL5_SETTING (SSD1289_PWRCTRL5_VCM(60) | SSD1289_PWRCTRL5_NOTP)
#endif
/****************************************************************************
* Private Type Definition
****************************************************************************/
/* This structure describes the state of this driver */
struct ssd1289_dev_s
{
/* Publicly visible device structure */
struct lcd_dev_s dev;
/* Private LCD-specific information follows */
FAR struct ssd1289_lcd_s *lcd; /* The contained platform-specific, LCD interface */
uint8_t power; /* Current power setting */
/* These fields simplify and reduce debug output */
#ifdef CONFIG_DEBUG_LCD
bool put; /* Last raster operation was a putrun */
fb_coord_t firstrow; /* First row of the run */
fb_coord_t lastrow; /* Last row of the run */
fb_coord_t col; /* Column of the run */
size_t npixels; /* Length of the run */
#endif
/* 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[SSD1289_XRES];
};
/****************************************************************************
* Private Function Protototypes
****************************************************************************/
/* Low Level LCD access */
static void ssd1289_putreg(FAR struct ssd1289_lcd_s *lcd,
uint8_t regaddr,
uint16_t regval);
#ifndef CONFIG_LCD_NOGETRUN
static uint16_t ssd1289_readreg(FAR struct ssd1289_lcd_s *lcd,
uint8_t regaddr);
#endif
static inline void ssd1289_gramwrite(FAR struct ssd1289_lcd_s *lcd,
uint16_t rgbcolor);
#ifndef CONFIG_LCD_NOGETRUN
static inline void ssd1289_readsetup(FAR struct ssd1289_lcd_s *lcd,
FAR uint16_t *accum);
static inline uint16_t ssd1289_gramread(FAR struct ssd1289_lcd_s *lcd,
FAR uint16_t *accum);
#endif
static void ssd1289_setcursor(FAR struct ssd1289_lcd_s *lcd,
uint16_t column,
uint16_t row);
/* LCD Data Transfer Methods */
#if 0 /* Sometimes useful */
static void ssd1289_dumprun(FAR const char *msg, FAR uint16_t *run,
size_t npixels);
#else
# define ssd1289_dumprun(m,r,n)
#endif
#ifdef CONFIG_DEBUG_LCD
static void ssd1289_showrun(FAR struct ssd1289_dev_s *priv, fb_coord_t row,
fb_coord_t col, size_t npixels, bool put);
#else
# define ssd1289_showrun(p,r,c,n,b)
#endif
static int ssd1289_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 ssd1289_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 ssd1289_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int ssd1289_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 ssd1289_getpower(FAR struct lcd_dev_s *dev);
static int ssd1289_setpower(FAR struct lcd_dev_s *dev, int power);
static int ssd1289_getcontrast(FAR struct lcd_dev_s *dev);
static int ssd1289_setcontrast(FAR struct lcd_dev_s *dev,
unsigned int contrast);
/* Initialization */
static inline int ssd1289_hwinitialize(FAR struct ssd1289_dev_s *priv);
/****************************************************************************
* Private Data
****************************************************************************/
/* This driver can support only a signal SSD1289 device.
* The following is the single SSD1289 driver state instance:
*/
static struct ssd1289_dev_s g_lcddev;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ssd1289_putreg(lcd,
*
* Description:
* Write to an LCD register
*
****************************************************************************/
static void ssd1289_putreg(FAR struct ssd1289_lcd_s *lcd,
uint8_t regaddr, uint16_t regval)
{
/* Set the index register to the register address and write the register
* contents
*/
lcd->index(lcd, regaddr);
lcd->write(lcd, regval);
}
/****************************************************************************
* Name: ssd1289_readreg
*
* Description:
* Read from an LCD register
*
****************************************************************************/
#ifndef CONFIG_LCD_NOGETRUN
static uint16_t ssd1289_readreg(FAR struct ssd1289_lcd_s *lcd,
uint8_t regaddr)
{
/* Set the index register to the register address and read the register
* contents
*/
lcd->index(lcd, regaddr);
return lcd->read(lcd);
}
#endif
/****************************************************************************
* Name: ssd1289_gramselect
*
* Description:
* Setup to read or write multiple pixels to the GRAM memory
*
****************************************************************************/
static inline void ssd1289_gramselect(FAR struct ssd1289_lcd_s *lcd)
{
lcd->index(lcd, SSD1289_DATA);
}
/****************************************************************************
* Name: ssd1289_gramwrite
*
* Description:
* Setup to read or write multiple pixels to the GRAM memory
*
****************************************************************************/
static inline void ssd1289_gramwrite(FAR struct ssd1289_lcd_s *lcd,
uint16_t data)
{
lcd->write(lcd, data);
}
/****************************************************************************
* Name: ssd1289_readsetup
*
* Description:
* Prime the operation by reading one pixel from the GRAM memory if
* necessary for this LCD type. When reading 16-bit gram data, there
* may be some shifts in the returned data:
*
* - ILI932x: Discard first dummy read; no shift in the return data
*
****************************************************************************/
#ifndef CONFIG_LCD_NOGETRUN
static inline void ssd1289_readsetup(FAR struct ssd1289_lcd_s *lcd,
FAR uint16_t *accum)
{
/* Read-ahead one pixel */
*accum = lcd->read(lcd);
}
#endif
/****************************************************************************
* Name: ssd1289_gramread
*
* Description:
* Read one correctly aligned pixel from the GRAM memory.
* Possibly shifting the data and possibly swapping red and green
* components.
*
* - ILI932x: Unknown -- assuming colors are in the color order
*
****************************************************************************/
#ifndef CONFIG_LCD_NOGETRUN
static inline uint16_t ssd1289_gramread(FAR struct ssd1289_lcd_s *lcd,
FAR uint16_t *accum)
{
/* Read the value (GRAM register already selected) */
return lcd->read(lcd);
}
#endif
/****************************************************************************
* Name: ssd1289_setcursor
*
* Description:
* Set the cursor position.
* In landscape mode, the "column" is actually the physical
* Y position and the "row" is the physical X position.
*
****************************************************************************/
static void ssd1289_setcursor(FAR struct ssd1289_lcd_s *lcd,
uint16_t column, uint16_t row)
{
#if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT)
ssd1289_putreg(lcd, SSD1289_XADDR, column); /* 0-239 */
ssd1289_putreg(lcd, SSD1289_YADDR, row); /* 0-319 */
#elif defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_RLANDSCAPE)
ssd1289_putreg(lcd, SSD1289_XADDR, row); /* 0-239 */
ssd1289_putreg(lcd, SSD1289_YADDR, column); /* 0-319 */
#endif
}
/****************************************************************************
* Name: ssd1289_dumprun
*
* Description:
* Dump the contexts of the run buffer:
*
* run - The buffer in containing the run read to be dumped
* npixels - The number of pixels to dump
*
****************************************************************************/
#if 0 /* Sometimes useful */
static void ssd1289_dumprun(FAR const char *msg,
FAR uint16_t *run, size_t npixels)
{
int i;
int j;
syslog(LOG_INFO, "\n%s:\n", msg);
for (i = 0; i < npixels; i += 16)
{
up_putc(' ');
syslog(LOG_INFO, " ");
for (j = 0; j < 16; j++)
{
syslog(LOG_INFO, " %04x", *run++);
}
up_putc('\n');
}
}
#endif
/****************************************************************************
* Name: ssd1289_showrun
*
* Description:
* When LCD debug is enabled, try to reduce then amount of output data
* generated by ssd1289_putrun and ssd1289_getrun
*
****************************************************************************/
#ifdef CONFIG_DEBUG_LCD
static void ssd1289_showrun(FAR struct ssd1289_dev_s *priv, fb_coord_t row,
fb_coord_t col, size_t npixels, bool put)
{
fb_coord_t nextrow = priv->lastrow + 1;
/* Has anything changed
* (other than the row is the next row in the sequence)?
*/
if (put == priv->put && row == nextrow && col == priv->col &&
npixels == priv->npixels)
{
/* No, just update the last row */
priv->lastrow = nextrow;
}
else
{
/* Yes... then this is the end of the preceding sequence.
* Output the last run
* (if there were more than one run in the sequence).
*/
if (priv->firstrow != priv->lastrow)
{
lcdinfo("...\n");
lcdinfo("%s row: %d col: %d npixels: %d\n",
priv->put ? "PUT" : "GET",
priv->lastrow, priv->col, priv->npixels);
}
/* And we are starting a new sequence. Output the first run of the
* new sequence
*/
lcdinfo("%s row: %d col: %d npixels: %d\n",
put ? "PUT" : "GET", row, col, npixels);
/* And save information about the run so that we can detect
* continuations of the sequence.
*/
priv->put = put;
priv->firstrow = row;
priv->lastrow = row;
priv->col = col;
priv->npixels = npixels;
}
}
#endif
/****************************************************************************
* Name: ssd1289_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* 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
* (range: 0 < npixels <= xres-col)
*
****************************************************************************/
static int ssd1289_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 ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
FAR struct ssd1289_lcd_s *lcd = priv->lcd;
FAR const uint16_t *src = (FAR const uint16_t *)buffer;
int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
ssd1289_showrun(priv, row, col, npixels, true);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
/* Select the LCD */
lcd->select(lcd);
/* Write the run to GRAM. */
#ifdef CONFIG_LCD_LANDSCAPE
/* Convert coordinates -- Here the edge away from the row of buttons on
* the STM3240G-EVAL is used as the top.
*/
/* Write the GRAM data, manually incrementing X */
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position */
ssd1289_setcursor(lcd, col, row);
ssd1289_gramselect(lcd);
ssd1289_gramwrite(lcd, *src);
/* Increment to the next column */
src++;
col++;
}
#elif defined(CONFIG_LCD_RLANDSCAPE)
/* Convert coordinates -- Here the edge next to the row of buttons on
* the STM3240G-EVAL is used as the top.
*/
col = (SSD1289_XRES - 1) - col;
row = (SSD1289_YRES - 1) - row;
/* Set the cursor position */
ssd1289_setcursor(lcd, col, row);
/* Then write the GRAM data, auto-decrementing X */
ssd1289_gramselect(lcd);
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position
* (auto-decrements to the next column)
*/
ssd1289_gramwrite(lcd, *src);
src++;
}
#elif defined(CONFIG_LCD_PORTRAIT)
/* Convert coordinates.
* In this configuration, the top of the display is to the left
* of the buttons (if the board is held so that the buttons are
* at the bottom of the board).
*/
col = (SSD1289_XRES - 1) - col;
/* Then write the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position */
ssd1289_setcursor(lcd, row, col);
ssd1289_gramselect(lcd);
ssd1289_gramwrite(lcd, *src);
/* Increment to the next column */
src++;
col--;
}
#else /* CONFIG_LCD_RPORTRAIT */
/* Convert coordinates. In this configuration, the top of the display is to the right
* of the buttons (if the board is held so that the buttons are at the bottom of the
* board).
*/
row = (SSD1289_YRES - 1) - row;
/* Then write the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position */
ssd1289_setcursor(lcd, row, col);
ssd1289_gramselect(lcd);
ssd1289_gramwrite(lcd, *src);
/* Decrement to the next column */
src++;
col++;
}
#endif
/* De-select the LCD */
lcd->deselect(lcd);
return OK;
}
/****************************************************************************
* Name: ssd1289_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD:
*
* 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 ssd1289_getrun(FAR struct lcd_dev_s *dev,
fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer,
size_t npixels)
{
#ifndef CONFIG_LCD_NOGETRUN
FAR struct ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
FAR struct ssd1289_lcd_s *lcd = priv->lcd;
FAR uint16_t *dest = (FAR uint16_t *)buffer;
uint16_t accum;
int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
ssd1289_showrun(priv, row, col, npixels, false);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
/* Select the LCD */
lcd->select(lcd);
/* Read the run from GRAM. */
#ifdef CONFIG_LCD_LANDSCAPE
/* Convert coordinates -- Here the edge away from the row of buttons on
* the STM3240G-EVAL is used as the top.
*/
for (i = 0; i < npixels; i++)
{
/* Read the next pixel from this position */
ssd1289_setcursor(lcd, row, col);
ssd1289_gramselect(lcd);
ssd1289_readsetup(lcd, &accum);
*dest++ = ssd1289_gramread(lcd, &accum);
/* Increment to the next column */
col++;
}
#elif defined(CONFIG_LCD_RLANDSCAPE)
/* Convert coordinates -- Here the edge next to the row of buttons on
* the STM3240G-EVAL is used as the top.
*/
col = (SSD1289_XRES - 1) - col;
row = (SSD1289_YRES - 1) - row;
/* Set the cursor position */
ssd1289_setcursor(lcd, col, row);
/* Then read the GRAM data, auto-decrementing Y */
ssd1289_gramselect(lcd);
/* Prime the pump for unaligned read data */
ssd1289_readsetup(lcd, &accum);
for (i = 0; i < npixels; i++)
{
/* Read the next pixel from this position
* (autoincrements to the next row)
*/
*dest++ = ssd1289_gramread(lcd, &accum);
}
#elif defined(CONFIG_LCD_PORTRAIT)
/* Convert coordinates. In this configuration, the top of the display is
* to the left of the buttons (if the board is held so that the buttons
* are at the bottom of the board).
*/
col = (SSD1289_XRES - 1) - col;
/* Then read the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
{
/* Read the next pixel from this position */
ssd1289_setcursor(lcd, row, col);
ssd1289_gramselect(lcd);
ssd1289_readsetup(lcd, &accum);
*dest++ = ssd1289_gramread(lcd, &accum);
/* Increment to the next column */
col--;
}
#else /* CONFIG_LCD_RPORTRAIT */
/* Convert coordinates. In this configuration, the top of the display is to the right
* of the buttons (if the board is held so that the buttons are at the bottom of the
* board).
*/
row = (SSD1289_YRES - 1) - row;
/* Then write the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position */
ssd1289_setcursor(lcd, row, col);
ssd1289_gramselect(lcd);
ssd1289_readsetup(lcd, &accum);
*dest++ = ssd1289_gramread(lcd, &accum);
/* Decrement to the next column */
col++;
}
#endif
/* De-select the LCD */
lcd->deselect(lcd);
return OK;
#else
return -ENOSYS;
#endif
}
/****************************************************************************
* Name: ssd1289_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
****************************************************************************/
static int ssd1289_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo)
{
DEBUGASSERT(dev && vinfo);
lcdinfo("fmt: %d xres: %d yres: %d nplanes: 1\n",
SSD1289_COLORFMT, SSD1289_XRES, SSD1289_YRES);
vinfo->fmt = SSD1289_COLORFMT; /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
vinfo->xres = SSD1289_XRES; /* Horizontal resolution in pixel columns */
vinfo->yres = SSD1289_YRES; /* Vertical resolution in pixel rows */
vinfo->nplanes = 1; /* Number of color planes supported */
return OK;
}
/****************************************************************************
* Name: ssd1289_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
****************************************************************************/
static int ssd1289_getplaneinfo(FAR struct lcd_dev_s *dev,
unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
FAR struct ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
DEBUGASSERT(dev && pinfo && planeno == 0);
lcdinfo("planeno: %d bpp: %d\n", planeno, SSD1289_BPP);
pinfo->putrun = ssd1289_putrun; /* Put a run into LCD memory */
pinfo->getrun = ssd1289_getrun; /* Get a run from LCD memory */
pinfo->buffer = (FAR uint8_t *)priv->runbuffer; /* Run scratch buffer */
pinfo->bpp = SSD1289_BPP; /* Bits-per-pixel */
pinfo->dev = dev; /* The lcd device */
return OK;
}
/****************************************************************************
* Name: ssd1289_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 ssd1289_getpower(FAR struct lcd_dev_s *dev)
{
lcdinfo("power: %d\n", 0);
return g_lcddev.power;
}
/****************************************************************************
* Name: ssd1289_poweroff
*
* Description:
* Enable/disable LCD panel power
* (0: full off - CONFIG_LCD_MAXPOWER: full on).
* On backlit LCDs, this setting may correspond to the backlight setting.
*
****************************************************************************/
static int ssd1289_poweroff(FAR struct ssd1289_lcd_s *lcd)
{
/* Set the backlight off */
lcd->backlight(lcd, 0);
/* Turn the display off */
ssd1289_putreg(lcd, SSD1289_DSPCTRL, 0);
/* Remember the power off state */
g_lcddev.power = 0;
return OK;
}
/****************************************************************************
* Name: ssd1289_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 ssd1289_setpower(FAR struct lcd_dev_s *dev, int power)
{
FAR struct ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
FAR struct ssd1289_lcd_s *lcd = priv->lcd;
lcdinfo("power: %d\n", power);
DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER);
/* Set new power level */
if (power > 0)
{
/* Set the backlight level */
lcd->backlight(lcd, power);
/* Then turn the display on:
* D=ON(3) CM=0 DTE=1 GON=1 SPT=0 VLE=0 PT=0
*/
ssd1289_putreg(lcd, SSD1289_DSPCTRL,
(SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_GON |
SSD1289_DSPCTRL_DTE | SSD1289_DSPCTRL_VLE(0)));
g_lcddev.power = power;
}
else
{
/* Turn the display off */
ssd1289_poweroff(lcd);
}
return OK;
}
/****************************************************************************
* Name: ssd1289_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int ssd1289_getcontrast(FAR struct lcd_dev_s *dev)
{
lcdinfo("Not implemented\n");
return -ENOSYS;
}
/****************************************************************************
* Name: ssd1289_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int ssd1289_setcontrast(FAR struct lcd_dev_s *dev,
unsigned int contrast)
{
lcdinfo("contrast: %d\n", contrast);
return -ENOSYS;
}
/****************************************************************************
* Name: ssd1289_hwinitialize
*
* Description:
* Initialize the LCD hardware.
*
****************************************************************************/
static inline int ssd1289_hwinitialize(FAR struct ssd1289_dev_s *priv)
{
FAR struct ssd1289_lcd_s *lcd = priv->lcd;
#ifndef CONFIG_LCD_NOGETRUN
uint16_t id;
#endif
int ret;
/* Select the LCD */
lcd->select(lcd);
/* Read the device ID. Skip verification of the device ID is the LCD is
* write-only. What choice do we have?
*/
#ifndef CONFIG_LCD_NOGETRUN
id = ssd1289_readreg(lcd, SSD1289_DEVCODE);
if (id != 0)
{
lcdinfo("LCD ID: %04x\n", id);
}
/* If we could not get the ID, then let's just assume that this is an
* SSD1289. Perhaps we have some early register access issues.
* This seems to happen.
* But then perhaps we should not even bother to read the device ID at all?
*/
else
{
lcdwarn("WARNING: No LCD ID, assuming SSD1289\n");
id = SSD1289_DEVCODE_VALUE;
}
/* Check if the ID is for the SSD1289 */
if (id == SSD1289_DEVCODE_VALUE)
#endif
{
/* LCD controller configuration.
* Many details of the controller initialization must, unfortunately,
* vary from LCD to LCD. I have looked at the spec and at three
* different drivers for LCDs that have SSD1289 controllers. I have
* tried to summarize these differences as profiles (defined above).
* Some other alternatives are noted below.
*
* Most of the differences between LCDs are nothing more than a few
* minor bit settings. The most significant difference between LCD
* drivers in is the manner in which the LCD is powered up and in how
* the power controls are set.
* My suggestion is that if you have working LCD initialization code,
* you should simply replace the following guesses with your working
* code.
*/
/* Most drivers just enable the oscillator */
#ifdef SSD1289_USE_SIMPLE_INIT
ssd1289_putreg(lcd, SSD1289_OSCSTART, SSD1289_OSCSTART_OSCEN);
#else
/* But one goes through a more complex start-up sequence.
* Something like the following:
*
* First, put the display in INTERNAL operation:
* D=INTERNAL(1) CM=0 DTE=0 GON=1 SPT=0 VLE=0 PT=0
*/
ssd1289_putreg(lcd, SSD1289_DSPCTRL,
(SSD1289_DSPCTRL_INTERNAL | SSD1289_DSPCTRL_GON |
SSD1289_DSPCTRL_VLE(0)));
/* Then enable the oscillator */
ssd1289_putreg(lcd, SSD1289_OSCSTART, SSD1289_OSCSTART_OSCEN);
/* Turn the display on:
* D=ON(3) CM=0 DTE=0 GON=1 SPT=0 VLE=0 PT=0
*/
ssd1289_putreg(lcd, SSD1289_DSPCTRL,
(SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_GON |
SSD1289_DSPCTRL_VLE(0)));
/* Take the LCD out of sleep mode */
ssd1289_putreg(lcd, SSD1289_SLEEP, 0);
up_mdelay(30);
/* Turn the display on:
* D=INTERNAL(1) CM=0 DTE=1 GON=1 SPT=0 VLE=0 PT=0
*/
ssd1289_putreg(lcd, SSD1289_DSPCTRL,
(SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_DTE |
SSD1289_DSPCTRL_GON | SSD1289_DSPCTRL_VLE(0)));
#endif
/* Set up power control registers. There is a lot of variability
* from LCD-to-LCD in how the power registers are configured.
*/
ssd1289_putreg(lcd, SSD1289_PWRCTRL1, PWRCTRL1_SETTING);
ssd1289_putreg(lcd, SSD1289_PWRCTRL2, PWRCTRL2_SETTING);
/* One driver adds a delay here.. I doubt that this is really
* necessary.
*/
/* up_mdelay(15); */
ssd1289_putreg(lcd, SSD1289_PWRCTRL3, PWRCTRL3_SETTING);
ssd1289_putreg(lcd, SSD1289_PWRCTRL4, PWRCTRL4_SETTING);
ssd1289_putreg(lcd, SSD1289_PWRCTRL5, PWRCTRL5_SETTING);
/* One driver does an odd setting of the driver output control.
* No idea why.
*/
#if 0
ssd1289_putreg(lcd, SSD1289_OUTCTRL,
(SSD1289_OUTCTRL_MUX(12) | SSD1289_OUTCTRL_TB |
SSD1289_OUTCTRL_BGR | SSD1289_OUTCTRL_CAD));
/* The same driver does another small delay here */
up_mdelay(15);
#endif
/* After this point, the drivers differ only in some varying register
* bit settings.
*/
/* Set the driver output control.
* PORTRAIT MODES:
* MUX=319, TB=1, SM=0, BGR=1, CAD=0, REV=1, RL=0
* LANDSCAPE MODES:
* MUX=319, TB=0, SM=0, BGR=1, CAD=0, REV=1, RL=0
*/
#if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT)
ssd1289_putreg(lcd, SSD1289_OUTCTRL,
(SSD1289_OUTCTRL_MUX(319) | SSD1289_OUTCTRL_TB |
SSD1289_OUTCTRL_BGR | SSD1289_OUTCTRL_REV));
#else
ssd1289_putreg(lcd, SSD1289_OUTCTRL,
(SSD1289_OUTCTRL_MUX(319) | SSD1289_OUTCTRL_BGR |
SSD1289_OUTCTRL_REV));
#endif
/* Set the LCD driving AC waveform
* NW=0, WSMD=0, EOR=1, BC=1, ENWD=0, FLD=0
*/
ssd1289_putreg(lcd, SSD1289_ACCTRL,
(SSD1289_ACCTRL_EOR | SSD1289_ACCTRL_BC));
/* Take the LCD out of sleep mode (isn't this redundant in the
* non-simple case?)
*/
ssd1289_putreg(lcd, SSD1289_SLEEP, 0);
/* Set entry mode */
#if defined(CONFIG_LCD_PORTRAIT) || defined(CONFIG_LCD_RPORTRAIT)
/* LG=0, AM=0, ID=3, TY=2, DMODE=0, WMODE=0, OEDEF=0, TRANS=0, DRM=3
* Alternative TY=2 (But TY only applies in 262K color mode anyway)
*/
ssd1289_putreg(lcd, SSD1289_ENTRY,
(SSD1289_ENTRY_ID_HINCVINC | SSD1289_ENTRY_TY_C |
SSD1289_ENTRY_DMODE_RAM | SSD1289_ENTRY_DFM_65K));
#else
/* LG=0, AM=1, ID=3, TY=2, DMODE=0, WMODE=0, OEDEF=0, TRANS=0, DRM=3 */
/* Alternative TY=2 (But TY only applies in 262K color mode anyway) */
ssd1289_putreg(lcd, SSD1289_ENTRY,
(SSD1289_ENTRY_AM | SSD1289_ENTRY_ID_HINCVINC |
SSD1289_ENTRY_TY_C | SSD1289_ENTRY_DMODE_RAM |
SSD1289_ENTRY_DFM_65K));
#endif
/* Clear compare registers */
ssd1289_putreg(lcd, SSD1289_CMP1, 0);
ssd1289_putreg(lcd, SSD1289_CMP2, 0);
/* One driver puts a huge, 100 millisecond delay here */
/* up_mdelay(100); */
/* Set Horizontal and vertical porch.
* Horizontal porch: 239 pixels per line, delay=28
* Vertical porch: VBP=3, XFP=0
*/
ssd1289_putreg(lcd, SSD1289_HPORCH,
(28 << SSD1289_HPORCH_HBP_SHIFT) |
(239 << SSD1289_HPORCH_XL_SHIFT));
ssd1289_putreg(lcd, SSD1289_VPORCH,
(3 << SSD1289_VPORCH_VBP_SHIFT) |
(0 << SSD1289_VPORCH_XFP_SHIFT));
/* Set display control.
* D=ON(3), CM=0 (not 8-color), DTE=1, GON=1, SPT=0, VLE=1 PT=0
*/
ssd1289_putreg(lcd, SSD1289_DSPCTRL,
(SSD1289_DSPCTRL_ON | SSD1289_DSPCTRL_DTE |
SSD1289_DSPCTRL_GON | SSD1289_DSPCTRL_VLE(1)));
/* Frame cycle control. Alternative: SSD1289_FCYCCTRL_DIV8 */
ssd1289_putreg(lcd, SSD1289_FCYCCTRL, 0);
/* Gate scan start position = 0 */
ssd1289_putreg(lcd, SSD1289_GSTART, 0);
/* Clear vertical scrolling */
ssd1289_putreg(lcd, SSD1289_VSCROLL1, 0);
ssd1289_putreg(lcd, SSD1289_VSCROLL2, 0);
/* Setup window 1 (0-319) */
ssd1289_putreg(lcd, SSD1289_W1START, 0);
ssd1289_putreg(lcd, SSD1289_W1END, 319);
/* Disable window 2 (0-0) */
ssd1289_putreg(lcd, SSD1289_W2START, 0);
ssd1289_putreg(lcd, SSD1289_W2END, 0);
/* Horizontal start and end (0-239) */
ssd1289_putreg(lcd, SSD1289_HADDR,
(0 << SSD1289_HADDR_HSA_SHIFT) |
(239 << SSD1289_HADDR_HEA_SHIFT));
/* Vertical start and end (0-319) */
ssd1289_putreg(lcd, SSD1289_VSTART, 0);
ssd1289_putreg(lcd, SSD1289_VEND, 319);
/* Gamma controls */
ssd1289_putreg(lcd, SSD1289_GAMMA1, 0x0707);
ssd1289_putreg(lcd, SSD1289_GAMMA2, 0x0204); /* Alternative: 0x0704 */
ssd1289_putreg(lcd, SSD1289_GAMMA3, 0x0204);
ssd1289_putreg(lcd, SSD1289_GAMMA4, 0x0502);
ssd1289_putreg(lcd, SSD1289_GAMMA5, 0x0507);
ssd1289_putreg(lcd, SSD1289_GAMMA6, 0x0204);
ssd1289_putreg(lcd, SSD1289_GAMMA7, 0x0204);
ssd1289_putreg(lcd, SSD1289_GAMMA8, 0x0502);
ssd1289_putreg(lcd, SSD1289_GAMMA9, 0x0302);
ssd1289_putreg(lcd, SSD1289_GAMMA10, 0x0302); /* Alternative: 0x1f00 */
/* Clear write mask */
ssd1289_putreg(lcd, SSD1289_WRMASK1, 0);
ssd1289_putreg(lcd, SSD1289_WRMASK2, 0);
/* Set frame frequency = 65Hz (This should not be necessary since this
* is the default POR value)
*/
ssd1289_putreg(lcd, SSD1289_FFREQ, SSD1289_FFREQ_OSC_FF65);
/* Set the cursor at the home position and set the index register to
* the gram data register (I can't imagine these are necessary).
*/
ssd1289_setcursor(lcd, 0, 0);
ssd1289_gramselect(lcd);
/* One driver has a 50 msec delay here */
/* up_mdelay(50); */
ret = OK;
}
#ifndef CONFIG_LCD_NOGETRUN
else
{
lcderr("ERROR: Unsupported LCD type\n");
ret = -ENODEV;
}
#endif
/* De-select the LCD */
lcd->deselect(lcd);
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: ssd1289_lcdinitialize
*
* Description:
* Initialize the LCD video hardware.
* The initial state of the LCD is fully initialized, display memory
* cleared, and the LCD ready to use, but with the power setting at 0
* (full off).
*
****************************************************************************/
FAR struct lcd_dev_s *ssd1289_lcdinitialize(FAR struct ssd1289_lcd_s *lcd)
{
int ret;
lcdinfo("Initializing\n");
/* If we support multiple SSD1289 devices, this is where we would allocate
* a new driver data structure.
*/
FAR struct ssd1289_dev_s *priv = &g_lcddev;
/* Initialize the driver data structure */
priv->dev.getvideoinfo = ssd1289_getvideoinfo;
priv->dev.getplaneinfo = ssd1289_getplaneinfo;
priv->dev.getpower = ssd1289_getpower;
priv->dev.setpower = ssd1289_setpower;
priv->dev.getcontrast = ssd1289_getcontrast;
priv->dev.setcontrast = ssd1289_setcontrast;
priv->lcd = lcd;
/* Configure and enable LCD */
ret = ssd1289_hwinitialize(priv);
if (ret == OK)
{
/* Clear the display (setting it to the color 0=black) */
ssd1289_clear(&priv->dev, 0);
/* Turn the display off */
ssd1289_poweroff(lcd);
return &g_lcddev.dev;
}
return NULL;
}
/****************************************************************************
* Name: ssd1289_clear
*
* Description:
* This is a non-standard LCD interface just for the stm3240g-EVAL board.
* Because of the various rotations, clearing the display in the normal way
* by writing a sequences of runs that covers the entire display can be
* very slow. Here the display is cleared by simply setting all GRAM
* memory to the specified color.
*
****************************************************************************/
void ssd1289_clear(FAR struct lcd_dev_s *dev, uint16_t color)
{
FAR struct ssd1289_dev_s *priv = (FAR struct ssd1289_dev_s *)dev;
FAR struct ssd1289_lcd_s *lcd = priv->lcd;
uint32_t i;
/* Select the LCD and home the cursor position */
lcd->select(lcd);
ssd1289_setcursor(lcd, 0, 0);
/* Prepare to write GRAM data */
ssd1289_gramselect(lcd);
/* Copy color into all of GRAM.
* Orientation does not matter in this case.
*/
for (i = 0; i < SSD1289_XRES * SSD1289_YRES; i++)
{
ssd1289_gramwrite(lcd, color);
}
/* De-select the LCD */
lcd->deselect(lcd);
}
#endif /* CONFIG_LCD_SSD1289 */
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