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/**************************************************************************************
* configs/stm3210e-eval/src/up_lcd.c
* arch/arm/src/board/up_lcd.c
*
* Copyright (C) 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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.
*
**************************************************************************************/
/* This driver supports the following LCDs:
*
* 1. Ampire AM-240320LTNQW00H
* 2. Orise Tech SPFD5408B
* 3. RenesasSP R61580
*
* The driver dynamically selects the LCD based on the reported LCD ID value. However,
* code size can be reduced by suppressing support for individual LCDs using:
*
* CONFIG_STM32_AM240320_DISABLE
* CONFIG_STM32_SPFD5408B_DISABLE
* CONFIG_STM32_R61580_DISABLE
*
* Omitting the above (or setting them to "n") enables support for the LCD. Setting
* any of the above to "y" will disable support for the corresponding LCD.
*/
/**************************************************************************************
* 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.h>
#include <nuttx/lcd/lcd.h>
#include <arch/board/board.h>
#include "up_arch.h"
#include "stm32.h"
#include "stm32_internal.h"
#include "stm3210e-internal.h"
/**************************************************************************************
* 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
# undef CONFIG_LCD_MAXPOWER
# ifdef CONFIG_LCD_BACKLIGHT
# define CONFIG_LCD_MAXPOWER 100
# else
# define CONFIG_LCD_MAXPOWER 1
# endif
#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_RPORTRAIT)
# error "Cannot define both portrait and any other orientations"
# endif
#elif defined(CONFIG_LCD_RPORTRAIT)
# if defined(CONFIG_LCD_LANDSCAPE) || defined(CONFIG_LCD_PORTRAIT)
# error "Cannot define both rportrait and any other orientations"
# endif
#elif !defined(CONFIG_LCD_LANDSCAPE)
# define CONFIG_LCD_LANDSCAPE 1
#endif
/* Backlight */
#ifdef CONFIG_LCD_BACKLIGHT
# ifndef CONFIG_STM32_TIM1
# error "CONFIG_STM32_TIM1 to use the LCD backlight controls"
# endif
# if CONFIG_LCD_MAXPOWER < 2
# warning "A larger value of CONFIG_LCD_MAXPOWER is recommended"
# endif
#endif
#if defined(CONFIG_STM32_TIM1_FULL_REMAP)
# error "PA8 cannot be configured as TIM1 CH1 with full remap"
#endif
/* When reading 16-bit gram data, there may some shifts in the returned data
* and/or there may be some colors in the incorrect posisions:
*
* - SPFD5408B: There appears to be a 5-bit shift in the returned data.
* Red and green appear to be swapped on read-back as well
* - R61580: There is a 16-bit (1 pixel) shift in the returned data.
* - AM240320: Unknown -- assume colors are correct for now.
*/
#define SPFD5408B_RDSHIFT 5
/* Define CONFIG_DEBUG_LCD to enable detailed LCD debug output. Verbose debug must
* also be enabled.
*/
#ifndef CONFIG_DEBUG
# undef CONFIG_DEBUG_VERBOSE
# undef CONFIG_DEBUG_GRAPHICS
# undef CONFIG_DEBUG_LCD
#endif
#ifndef CONFIG_DEBUG_VERBOSE
# undef CONFIG_DEBUG_LCD
#endif
/* Display/Color Properties ***********************************************************/
/* Display Resolution */
#ifdef CONFIG_LCD_LANDSCAPE
# define STM3210E_XRES 320
# define STM3210E_YRES 240
#else
# define STM3210E_XRES 240
# define STM3210E_YRES 320
#endif
/* Color depth and format */
#define STM3210E_BPP 16
#define STM3210E_COLORFMT FB_FMT_RGB16_565
/* STM3210E-EVAL LCD Hardware Definitions *********************************************/
/* LCD /CS is CE4, Bank 4 of NOR/SRAM Bank 1~4 */
#define STM3210E_LCDBASE ((uint32_t)(0x60000000 | 0x0c000000))
#define LCD ((struct lcd_regs_s *) STM3210E_LCDBASE)
#define LCD_REG_0 0x00
#define LCD_REG_1 0x01
#define LCD_REG_2 0x02
#define LCD_REG_3 0x03
#define LCD_REG_4 0x04
#define LCD_REG_5 0x05
#define LCD_REG_6 0x06
#define LCD_REG_7 0x07
#define LCD_REG_8 0x08
#define LCD_REG_9 0x09
#define LCD_REG_10 0x0a
#define LCD_REG_12 0x0c
#define LCD_REG_13 0x0d
#define LCD_REG_14 0x0e
#define LCD_REG_15 0x0f
#define LCD_REG_16 0x10
#define LCD_REG_17 0x11
#define LCD_REG_18 0x12
#define LCD_REG_19 0x13
#define LCD_REG_20 0x14
#define LCD_REG_21 0x15
#define LCD_REG_22 0x16
#define LCD_REG_23 0x17
#define LCD_REG_24 0x18
#define LCD_REG_25 0x19
#define LCD_REG_26 0x1a
#define LCD_REG_27 0x1b
#define LCD_REG_28 0x1c
#define LCD_REG_29 0x1d
#define LCD_REG_30 0x1e
#define LCD_REG_31 0x1f
#define LCD_REG_32 0x20
#define LCD_REG_33 0x21
#define LCD_REG_34 0x22
#define LCD_REG_36 0x24
#define LCD_REG_37 0x25
#define LCD_REG_40 0x28
#define LCD_REG_41 0x29
#define LCD_REG_43 0x2b
#define LCD_REG_45 0x2d
#define LCD_REG_48 0x30
#define LCD_REG_49 0x31
#define LCD_REG_50 0x32
#define LCD_REG_51 0x33
#define LCD_REG_52 0x34
#define LCD_REG_53 0x35
#define LCD_REG_54 0x36
#define LCD_REG_55 0x37
#define LCD_REG_56 0x38
#define LCD_REG_57 0x39
#define LCD_REG_58 0x3a
#define LCD_REG_59 0x3b
#define LCD_REG_60 0x3c
#define LCD_REG_61 0x3d
#define LCD_REG_62 0x3e
#define LCD_REG_63 0x3f
#define LCD_REG_64 0x40
#define LCD_REG_65 0x41
#define LCD_REG_66 0x42
#define LCD_REG_67 0x43
#define LCD_REG_68 0x44
#define LCD_REG_69 0x45
#define LCD_REG_70 0x46
#define LCD_REG_71 0x47
#define LCD_REG_72 0x48
#define LCD_REG_73 0x49
#define LCD_REG_74 0x4a
#define LCD_REG_75 0x4b
#define LCD_REG_76 0x4c
#define LCD_REG_77 0x4d
#define LCD_REG_78 0x4e
#define LCD_REG_79 0x4f
#define LCD_REG_80 0x50
#define LCD_REG_81 0x51
#define LCD_REG_82 0x52
#define LCD_REG_83 0x53
#define LCD_REG_96 0x60
#define LCD_REG_97 0x61
#define LCD_REG_106 0x6a
#define LCD_REG_118 0x76
#define LCD_REG_128 0x80
#define LCD_REG_129 0x81
#define LCD_REG_130 0x82
#define LCD_REG_131 0x83
#define LCD_REG_132 0x84
#define LCD_REG_133 0x85
#define LCD_REG_134 0x86
#define LCD_REG_135 0x87
#define LCD_REG_136 0x88
#define LCD_REG_137 0x89
#define LCD_REG_139 0x8b
#define LCD_REG_140 0x8c
#define LCD_REG_141 0x8d
#define LCD_REG_143 0x8f
#define LCD_REG_144 0x90
#define LCD_REG_145 0x91
#define LCD_REG_146 0x92
#define LCD_REG_147 0x93
#define LCD_REG_148 0x94
#define LCD_REG_149 0x95
#define LCD_REG_150 0x96
#define LCD_REG_151 0x97
#define LCD_REG_152 0x98
#define LCD_REG_153 0x99
#define LCD_REG_154 0x9a
#define LCD_REG_157 0x9d
#define LCD_REG_192 0xc0
#define LCD_REG_193 0xc1
#define LCD_REG_229 0xe5
#define LCD_BL_TIMER_PERIOD 8999
/* LCD IDs */
#define SPFD5408B_ID 0x5408
#define R61580_ID 0x1580
/* Debug ******************************************************************************/
#ifdef CONFIG_DEBUG_LCD
# define lcddbg(format, arg...) vdbg(format, ##arg)
#else
# define lcddbg(x...)
#endif
/**************************************************************************************
* Private Type Definition
**************************************************************************************/
/* LCD type */
enum lcd_type_e
{
LCD_TYPE_UNKNOWN = 0,
LCD_TYPE_SPFD5408B,
LCD_TYPE_R61580,
LCD_TYPE_AM240320
};
/* This structure describes the LCD registers */
struct lcd_regs_s
{
volatile uint16_t address;
volatile uint16_t value;
};
/* This structure describes the state of this driver */
struct stm3210e_dev_s
{
/* Publically visible device structure */
struct lcd_dev_s dev;
/* Private LCD-specific information follows */
uint8_t type; /* LCD type. See enum lcd_type_e */
uint8_t power; /* Current power setting */
};
/**************************************************************************************
* Private Function Protototypes
**************************************************************************************/
/* Low Level LCD access */
static void stm3210e_writereg(uint8_t regaddr, uint16_t regval);
static uint16_t stm3210e_readreg(uint8_t regaddr);
static inline void stm3210e_gramselect(void);
static inline void stm3210e_writegram(uint16_t rgbval);
static void stm3210e_readsetup(FAR uint16_t *accum);
static void stm3210e_readnosetup(FAR uint16_t *accum);
static uint16_t stm3210e_readshift(FAR uint16_t *accum);
static uint16_t stm3210e_readnoshift(FAR uint16_t *accum);
static void stm3210e_setcursor(uint16_t col, uint16_t row);
/* LCD Data Transfer Methods */
static int stm3210e_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels);
static int stm3210e_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels);
/* LCD Configuration */
static int stm3210e_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int stm3210e_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 stm3210e_getpower(struct lcd_dev_s *dev);
static int stm3210e_setpower(struct lcd_dev_s *dev, int power);
static int stm3210e_getcontrast(struct lcd_dev_s *dev);
static int stm3210e_setcontrast(struct lcd_dev_s *dev, unsigned int contrast);
/* Initialization */
static inline void stm3210e_lcdinitialize(void);
#ifdef CONFIG_LCD_BACKLIGHT
static void stm3210e_backlight(void);
#else
# define stm3210e_backlight()
#endif
/**************************************************************************************
* 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 uint16_t g_runbuffer[STM3210E_XRES];
/* This structure describes the overall LCD video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = STM3210E_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
.xres = STM3210E_XRES, /* Horizontal resolution in pixel columns */
.yres = STM3210E_YRES, /* Vertical resolution in pixel rows */
.nplanes = 1, /* Number of color planes supported */
};
/* This is the standard, NuttX Plane information object */
static const struct lcd_planeinfo_s g_planeinfo =
{
.putrun = stm3210e_putrun, /* Put a run into LCD memory */
.getrun = stm3210e_getrun, /* Get a run from LCD memory */
.buffer = (uint8_t*)g_runbuffer, /* Run scratch buffer */
.bpp = STM3210E_BPP, /* Bits-per-pixel */
};
/* This is the standard, NuttX LCD driver object */
static struct stm3210e_dev_s g_lcddev =
{
.dev =
{
/* LCD Configuration */
.getvideoinfo = stm3210e_getvideoinfo,
.getplaneinfo = stm3210e_getplaneinfo,
/* LCD RGB Mapping -- Not supported */
/* Cursor Controls -- Not supported */
/* LCD Specific Controls */
.getpower = stm3210e_getpower,
.setpower = stm3210e_setpower,
.getcontrast = stm3210e_getcontrast,
.setcontrast = stm3210e_setcontrast,
},
};
/**************************************************************************************
* Private Functions
**************************************************************************************/
/**************************************************************************************
* Name: stm3210e_writereg
*
* Description:
* Write to an LCD register
*
**************************************************************************************/
static void stm3210e_writereg(uint8_t regaddr, uint16_t regval)
{
/* Write the register address then write the register value */
LCD->address = regaddr;
LCD->value = regval;
}
/**************************************************************************************
* Name: stm3210e_readreg
*
* Description:
* Read from an LCD register
*
**************************************************************************************/
static uint16_t stm3210e_readreg(uint8_t regaddr)
{
/* Write the register address then read the register value */
LCD->address = regaddr;
return LCD->value;
}
/**************************************************************************************
* Name: stm3210e_gramselect
*
* Description:
* Setup to read or write multiple pixels to the GRAM memory
*
**************************************************************************************/
static inline void stm3210e_gramselect(void)
{
LCD->address = LCD_REG_34;
}
/**************************************************************************************
* Name: stm3210e_writegram
*
* Description:
* Write one pixel to the GRAM memory
*
**************************************************************************************/
static inline void stm3210e_writegram(uint16_t rgbval)
{
/* Write the value (GRAM register already selected) */
LCD->value = rgbval;
}
/**************************************************************************************
* Name: stm3210e_readsetup / stm3210e_readnosetup
*
* 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:
*
* - SPFD5408B: There appears to be a 5-bit shift in the returned data.
* - R61580: There is a 16-bit (1 pixel) shift in the returned data.
* - AM240320: Unknown -- assuming no shift in the return data
*
**************************************************************************************/
/* Used for SPFD5408B and R61580 */
#if !defined(CONFIG_STM32_SPFD5408B_DISABLE) || !defined(CONFIG_STM32_R61580_DISABLE)
static void stm3210e_readsetup(FAR uint16_t *accum)
{
/* Read-ahead one pixel */
*accum = LCD->value;
}
#endif
/* Used only for AM240320 */
#ifndef CONFIG_STM32_AM240320_DISABLE
static void stm3210e_readnosetup(FAR uint16_t *accum)
{
}
#endif
/**************************************************************************************
* Name: stm3210e_readshift / stm3210e_readnoshift
*
* Description:
* Read one correctly aligned pixel from the GRAM memory. Possibly shifting the
* data and possibly swapping red and green components.
*
* - SPFD5408B: There appears to be a 5-bit shift in the returned data.
* Red and green appear to be swapped on read-back as well
* - R61580: There is a 16-bit (1 pixel) shift in the returned data.
* All colors in the normal order
* - AM240320: Unknown -- assuming colors are in the color order
*
**************************************************************************************/
/* This version is used only for the SPFD5408B. It shifts the data by 5-bits and swaps
* red and green
*/
#ifndef CONFIG_STM32_SPFD5408B_DISABLE
static uint16_t stm3210e_readshift(FAR uint16_t *accum)
{
uint16_t red;
uint16_t green;
uint16_t blue;
/* Read the value (GRAM register already selected) */
uint16_t next = LCD->value;
/* Return previous bits 0-10 as bits 6-15 and next data bits 11-15 as bits 0-5
*
* xxxx xPPP PPPP PPPP
* NNNN Nxxx xxxx xxxx
*
* Assuming that SPFD5408B_RDSHIFT == 5
*/
uint16_t value = *accum << SPFD5408B_RDSHIFT | next >> (16-SPFD5408B_RDSHIFT);
/* Save the value for the next time we are called */
*accum = next;
/* Tear the RGB655 apart. Swap read and green */
red = (value << (11-5)) & 0xf800; /* Move bits 5-9 to 11-15 */
green = (value >> (10-5)) & 0x07e0; /* Move bits 10-15 to bits 5-10 */
blue = value & 0x001f; /* Blue is in the right place */
/* And put the RGB565 back together */
value = red | green | blue;
/* This is wierd... If blue is zero, then red+green values are off by 0x20.
* Except that both 0x0000 and 0x0020 can map to 0x0000. Need to revisit
* this!!!!!!!!!!! I might be misinterpreting some of the data that I have.
*/
#if 0 /* REVISIT */
if (value != 0 && blue == 0)
{
value += 0x20;
}
#endif
return value;
}
#endif
/* This version is used for the R61580 and for the AM240320. It neither shifts nor
* swaps colors.
*/
#if !defined(CONFIG_STM32_R61580_DISABLE) || !defined(CONFIG_STM32_AM240320_DISABLE)
static uint16_t stm3210e_readnoshift(FAR uint16_t *accum)
{
/* Read the value (GRAM register already selected) */
return LCD->value;
}
#endif
/**************************************************************************************
* Name: stm3210e_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 stm3210e_setcursor(uint16_t col, uint16_t row)
{
stm3210e_writereg(LCD_REG_32, row); /* GRAM horizontal address */
stm3210e_writereg(LCD_REG_33, col); /* GRAM vertical address */
}
/**************************************************************************************
* Name: stm3210e_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 stm3210e_dumprun(FAR const char *msg, FAR uint16_t *run, size_t npixels)
{
int i, j;
lib_rawprintf("\n%s:\n", msg);
for (i = 0; i < npixels; i += 16)
{
up_putc(' ');
lib_rawprintf(" ");
for (j = 0; j < 16; j++)
{
lib_rawprintf(" %04x", *run++);
}
up_putc('\n');
}
}
#endif
/**************************************************************************************
* Name: stm3210e_putrun
*
* Description:
* This method can be used to write a partial raster line to the LCD:
*
* row - Starting row to write to (range: 0 <= row < yres)
* col - Starting column to write to (range: 0 <= col <= xres-npixels)
* buffer - The buffer containing the run to be written to the LCD
* npixels - The number of pixels to write to the LCD
* (range: 0 < npixels <= xres-col)
*
**************************************************************************************/
static int stm3210e_putrun(fb_coord_t row, fb_coord_t col, FAR const uint8_t *buffer,
size_t npixels)
{
FAR const uint16_t *src = (FAR const uint16_t*)buffer;
int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
lcddbg("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
/* Write the run to GRAM. */
#ifdef CONFIG_LCD_LANDSCAPE
/* Convert coordinates -- Which edge of the display is the "top?" Here the edge
* with the simplest conversion is used.
*/
col = (STM3210E_XRES-1) - col;
/* Set the cursor position */
stm3210e_setcursor(col, row);
/* Then write the GRAM data, auto-decrementing X */
stm3210e_gramselect();
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position (auto-decrements to the next column) */
stm3210e_writegram(*src++);
}
#elif defined(CONFIG_LCD_PORTRAIT)
/* Convert coordinates. (Swap row and column. This is done implicitly). */
/* Then write the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position */
stm3210e_setcursor(row, col);
stm3210e_gramselect();
stm3210e_writegram(*src++);
/* Increment to next column */
col++;
}
#else /* CONFIG_LCD_RPORTRAIT */
/* Convert coordinates. (Swap row and column. This is done implicitly).
* Which edge of the display is the "top"?
*/
col = (STM3210E_XRES-1) - col;
row = (STM3210E_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 */
stm3210e_setcursor(row, col);
stm3210e_gramselect();
stm3210e_writegram(*src++);
/* Decrement to next column */
col--;
}
#endif
return OK;
}
/**************************************************************************************
* Name: stm3210e_getrun
*
* Description:
* This method can be used to read a partial raster line from the LCD:
*
* row - Starting row to read from (range: 0 <= row < yres)
* col - Starting column to read read (range: 0 <= col <= xres-npixels)
* buffer - The buffer in which to return the run read from the LCD
* npixels - The number of pixels to read from the LCD
* (range: 0 < npixels <= xres-col)
*
**************************************************************************************/
static int stm3210e_getrun(fb_coord_t row, fb_coord_t col, FAR uint8_t *buffer,
size_t npixels)
{
FAR uint16_t *dest = (FAR uint16_t*)buffer;
void (*readsetup)(FAR uint16_t *accum);
uint16_t (*readgram)(FAR uint16_t *accum);
uint16_t accum;
int i;
/* Buffer must be provided and aligned to a 16-bit address boundary */
lcddbg("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
/* Configure according to the LCD type */
switch (g_lcddev.type)
{
#ifndef CONFIG_STM32_SPFD5408B_DISABLE
case LCD_TYPE_SPFD5408B:
readsetup = stm3210e_readsetup;
readgram = stm3210e_readshift;
break;
#endif
#ifndef CONFIG_STM32_R61580_DISABLE
case LCD_TYPE_R61580:
readsetup = stm3210e_readsetup;
readgram = stm3210e_readnoshift;
break;
#endif
#ifndef CONFIG_STM32_AM240320_DISABLE
case LCD_TYPE_AM240320:
readsetup = stm3210e_readnosetup;
readgram = stm3210e_readnoshift;
break;
#endif
default: /* Shouldn't happen */
return -ENOSYS;
}
/* Read the run from GRAM. */
#ifdef CONFIG_LCD_LANDSCAPE
/* Convert coordinates -- Which edge of the display is the "top?" Here the edge
* with the simplest conversion is used.
*/
col = (STM3210E_XRES-1) - col;
/* Set the cursor position */
stm3210e_setcursor(col, row);
/* Then read the GRAM data, auto-decrementing Y */
stm3210e_gramselect();
/* Prime the pump for unaligned read data */
readsetup(&accum);
for (i = 0; i < npixels; i++)
{
/* Read the next pixel from this position (autoincrements to the next row) */
*dest++ = readgram(&accum);
}
#elif defined(CONFIG_LCD_PORTRAIT)
/* Convert coordinates (Swap row and column. This is done implicitly). */
/* Then read the GRAM data, manually incrementing Y (which is col) */
for (i = 0; i < npixels; i++)
{
/* Read the next pixel from this position */
stm3210e_setcursor(row, col);
stm3210e_gramselect();
readsetup(&accum);
*dest++ = readgram(&accum);
/* Increment to next column */
col++;
}
#else /* CONFIG_LCD_RPORTRAIT */
/* Convert coordinates. (Swap row and column. This is done implicitly).
* Whic edge of the display is the "top"?
*/
col = (STM3210E_XRES-1) - col;
row = (STM3210E_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 */
stm3210e_setcursor(row, col);
stm3210e_gramselect();
readsetup(&accum);
*dest++ = readgram(&accum);
/* Decrement to next column */
col--;
}
#endif
return OK;
}
/**************************************************************************************
* Name: stm3210e_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
**************************************************************************************/
static int stm3210e_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo)
{
DEBUGASSERT(dev && vinfo);
gvdbg("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: stm3210e_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
**************************************************************************************/
static int stm3210e_getplaneinfo(FAR struct lcd_dev_s *dev, unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
DEBUGASSERT(dev && pinfo && planeno == 0);
gvdbg("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
return OK;
}
/**************************************************************************************
* Name: stm3210e_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 stm3210e_getpower(struct lcd_dev_s *dev)
{
gvdbg("power: %d\n", 0);
return g_lcddev.power;
}
/**************************************************************************************
* Name: stm3210e_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 stm3210e_setpower(struct lcd_dev_s *dev, int power)
{
gvdbg("power: %d\n", power);
DEBUGASSERT(power <= CONFIG_LCD_MAXPOWER);
/* Set new power level */
if (power > 0)
{
#ifdef CONFIG_LCD_BACKLIGHT
uint32_t duty;
/* Caclulate the new backlight duty. It is a faction of the timer1
* period based on the ration of the current power setting to the
* maximum power setting.
*/
duty = ((uint32_t)LCD_BL_TIMER_PERIOD * (uint32_t)power) / CONFIG_LCD_MAXPOWER;
if (duty >= LCD_BL_TIMER_PERIOD)
{
duty = LCD_BL_TIMER_PERIOD - 1;
}
putreg16((uint16_t)duty, STM32_TIM1_CCR1);
#endif
/* Then turn the display on */
#ifndef CONFIG_STM32_AM240320_DISABLE
# if !defined (CONFIG_STM32_SPFD5408B_DISABLE) || !defined(CONFIG_STM32_R61580_DISABLE)
stm3210e_writereg(LCD_REG_7, g_lcddev.type == LCD_TYPE_AM240320 ? 0x0173 : 0x0112);
# else
stm3210e_writereg(LCD_REG_7, 0x0173);
# endif
#else
stm3210e_writereg(LCD_REG_7, 0x0112);
#endif
g_lcddev.power = power;
}
else
{
stm3210e_writereg(LCD_REG_7, 0);
g_lcddev.power = 0;
}
return OK;
}
/**************************************************************************************
* Name: stm3210e_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
**************************************************************************************/
static int stm3210e_getcontrast(struct lcd_dev_s *dev)
{
gvdbg("Not implemented\n");
return -ENOSYS;
}
/**************************************************************************************
* Name: stm3210e_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
**************************************************************************************/
static int stm3210e_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
{
gvdbg("contrast: %d\n", contrast);
return -ENOSYS;
}
/**************************************************************************************
* Name: stm3210e_lcdinitialize
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
**************************************************************************************/
static inline void stm3210e_lcdinitialize(void)
{
uint16_t id;
/* Check if the LCD is Orise Tech SPFD5408B Controller (or the compatible RenesasSP
* R61580).
*/
id = stm3210e_readreg(LCD_REG_0);
lcddbg("LCD ID: %04x\n", id);
/* Check if the ID is for the SPFD5408B or the almost compatible R61580 */
#if !defined(CONFIG_STM32_SPFD5408B_DISABLE) || !defined(CONFIG_STM32_R61580_DISABLE)
#if !defined(CONFIG_STM32_SPFD5408B_DISABLE) && !defined(CONFIG_STM32_R61580_DISABLE)
if (id == SPFD5408B_ID || id == R61580_ID)
#elif !defined(CONFIG_STM32_SPFD5408B_DISABLE)
if (id == SPFD5408B_ID)
#else
if (id == R61580_ID)
#endif
{
/* Set the LCD type for the SPFD5408B or the R61580 */
#if !defined(CONFIG_STM32_SPFD5408B_DISABLE) && !defined(CONFIG_STM32_R61580_DISABLE)
g_lcddev.type = (id == SPFD5408B_ID ? LCD_TYPE_SPFD5408B : LCD_TYPE_R61580);
#elif !defined(CONFIG_STM32_SPFD5408B_DISABLE)
g_lcddev.type = SPFD5408B_ID;
#else
g_lcddev.type = LCD_TYPE_R61580;
#endif
lcddbg("LCD type: %d\n", g_lcddev.type);
/* Start Initial Sequence */
stm3210e_writereg(LCD_REG_1, 0x0100); /* Set SS bit */
stm3210e_writereg(LCD_REG_2, 0x0700); /* Set 1 line inversion */
stm3210e_writereg(LCD_REG_3, 0x1030); /* Set GRAM write direction and BGR=1. */
stm3210e_writereg(LCD_REG_4, 0x0000); /* Resize register */
stm3210e_writereg(LCD_REG_8, 0x0202); /* Set the back porch and front porch */
stm3210e_writereg(LCD_REG_9, 0x0000); /* Set non-display area refresh cycle ISC[3:0] */
stm3210e_writereg(LCD_REG_10, 0x0000); /* FMARK function */
stm3210e_writereg(LCD_REG_12, 0x0000); /* RGB 18-bit System interface setting */
stm3210e_writereg(LCD_REG_13, 0x0000); /* Frame marker Position */
stm3210e_writereg(LCD_REG_15, 0x0000); /* RGB interface polarity, no impact */
/* Power On sequence */
stm3210e_writereg(LCD_REG_16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
stm3210e_writereg(LCD_REG_17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */
stm3210e_writereg(LCD_REG_18, 0x0000); /* VREG1OUT voltage */
stm3210e_writereg(LCD_REG_19, 0x0000); /* VDV[4:0] for VCOM amplitude */
up_mdelay(200); /* Dis-charge capacitor power voltage (200ms) */
stm3210e_writereg(LCD_REG_17, 0x0007); /* DC1[2:0], DC0[2:0], VC[2:0] */
up_mdelay(50);
stm3210e_writereg(LCD_REG_16, 0x12B0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
up_mdelay(50);
stm3210e_writereg(LCD_REG_18, 0x01bd); /* External reference voltage= Vci */
up_mdelay(50);
stm3210e_writereg(LCD_REG_19, 0x1400); /* VDV[4:0] for VCOM amplitude */
stm3210e_writereg(LCD_REG_41, 0x000e); /* VCM[4:0] for VCOMH */
up_mdelay(50);
stm3210e_writereg(LCD_REG_32, 0x0000); /* GRAM horizontal Address */
stm3210e_writereg(LCD_REG_33, 0x013f); /* GRAM Vertical Address */
/* Adjust the Gamma Curve (SPFD5408B)*/
stm3210e_writereg(LCD_REG_48, 0x0b0d);
stm3210e_writereg(LCD_REG_49, 0x1923);
stm3210e_writereg(LCD_REG_50, 0x1c26);
stm3210e_writereg(LCD_REG_51, 0x261c);
stm3210e_writereg(LCD_REG_52, 0x2419);
stm3210e_writereg(LCD_REG_53, 0x0d0b);
stm3210e_writereg(LCD_REG_54, 0x1006);
stm3210e_writereg(LCD_REG_55, 0x0610);
stm3210e_writereg(LCD_REG_56, 0x0706);
stm3210e_writereg(LCD_REG_57, 0x0304);
stm3210e_writereg(LCD_REG_58, 0x0e05);
stm3210e_writereg(LCD_REG_59, 0x0e01);
stm3210e_writereg(LCD_REG_60, 0x010e);
stm3210e_writereg(LCD_REG_61, 0x050e);
stm3210e_writereg(LCD_REG_62, 0x0403);
stm3210e_writereg(LCD_REG_63, 0x0607);
/* Set GRAM area */
stm3210e_writereg(LCD_REG_80, 0x0000); /* Horizontal GRAM Start Address */
stm3210e_writereg(LCD_REG_81, 0x00ef); /* Horizontal GRAM End Address */
stm3210e_writereg(LCD_REG_82, 0x0000); /* Vertical GRAM Start Address */
stm3210e_writereg(LCD_REG_83, 0x013f); /* Vertical GRAM End Address */
stm3210e_writereg(LCD_REG_96, 0xa700); /* Gate Scan Line */
stm3210e_writereg(LCD_REG_97, 0x0001); /* NDL, VLE, REV */
stm3210e_writereg(LCD_REG_106, 0x0000); /* set scrolling line */
/* Partial Display Control */
stm3210e_writereg(LCD_REG_128, 0x0000);
stm3210e_writereg(LCD_REG_129, 0x0000);
stm3210e_writereg(LCD_REG_130, 0x0000);
stm3210e_writereg(LCD_REG_131, 0x0000);
stm3210e_writereg(LCD_REG_132, 0x0000);
stm3210e_writereg(LCD_REG_133, 0x0000);
/* Panel Control */
stm3210e_writereg(LCD_REG_144, 0x0010);
stm3210e_writereg(LCD_REG_146, 0x0000);
stm3210e_writereg(LCD_REG_147, 0x0003);
stm3210e_writereg(LCD_REG_149, 0x0110);
stm3210e_writereg(LCD_REG_151, 0x0000);
stm3210e_writereg(LCD_REG_152, 0x0000);
/* Set GRAM write direction and BGR=1
* I/D=01 (Horizontal : increment, Vertical : decrement)
* AM=1 (address is updated in vertical writing direction)
*/
stm3210e_writereg(LCD_REG_3, 0x1018);
stm3210e_writereg(LCD_REG_7, 0); /* Display OFF */
}
else
#endif
{
#ifndef CONFIG_STM32_AM240320_DISABLE
g_lcddev.type = LCD_TYPE_AM240320;
lcddbg("LCD type: %d\n", g_lcddev.type);
/* Start Initial Sequence */
stm3210e_writereg(LCD_REG_229, 0x8000); /* Set the internal vcore voltage */
stm3210e_writereg(LCD_REG_0, 0x0001); /* Start internal OSC. */
stm3210e_writereg(LCD_REG_1, 0x0100); /* Set SS and SM bit */
stm3210e_writereg(LCD_REG_2, 0x0700); /* Set 1 line inversion */
stm3210e_writereg(LCD_REG_3, 0x1030); /* Set GRAM write direction and BGR=1. */
stm3210e_writereg(LCD_REG_4, 0x0000); /* Resize register */
stm3210e_writereg(LCD_REG_8, 0x0202); /* Set the back porch and front porch */
stm3210e_writereg(LCD_REG_9, 0x0000); /* Set non-display area refresh cycle ISC[3:0] */
stm3210e_writereg(LCD_REG_10, 0x0000); /* FMARK function */
stm3210e_writereg(LCD_REG_12, 0x0000); /* RGB interface setting */
stm3210e_writereg(LCD_REG_13, 0x0000); /* Frame marker Position */
stm3210e_writereg(LCD_REG_15, 0x0000); /* RGB interface polarity */
/* Power On sequence */
stm3210e_writereg(LCD_REG_16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
stm3210e_writereg(LCD_REG_17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */
stm3210e_writereg(LCD_REG_18, 0x0000); /* VREG1OUT voltage */
stm3210e_writereg(LCD_REG_19, 0x0000); /* VDV[4:0] for VCOM amplitude */
up_mdelay(200); /* Dis-charge capacitor power voltage (200ms) */
stm3210e_writereg(LCD_REG_16, 0x17b0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
stm3210e_writereg(LCD_REG_17, 0x0137); /* DC1[2:0], DC0[2:0], VC[2:0] */
up_mdelay(50);
stm3210e_writereg(LCD_REG_18, 0x0139); /* VREG1OUT voltage */
up_mdelay(50);
stm3210e_writereg(LCD_REG_19, 0x1d00); /* VDV[4:0] for VCOM amplitude */
stm3210e_writereg(LCD_REG_41, 0x0013); /* VCM[4:0] for VCOMH */
up_mdelay(50);
stm3210e_writereg(LCD_REG_32, 0x0000); /* GRAM horizontal Address */
stm3210e_writereg(LCD_REG_33, 0x0000); /* GRAM Vertical Address */
/* Adjust the Gamma Curve */
stm3210e_writereg(LCD_REG_48, 0x0006);
stm3210e_writereg(LCD_REG_49, 0x0101);
stm3210e_writereg(LCD_REG_50, 0x0003);
stm3210e_writereg(LCD_REG_53, 0x0106);
stm3210e_writereg(LCD_REG_54, 0x0b02);
stm3210e_writereg(LCD_REG_55, 0x0302);
stm3210e_writereg(LCD_REG_56, 0x0707);
stm3210e_writereg(LCD_REG_57, 0x0007);
stm3210e_writereg(LCD_REG_60, 0x0600);
stm3210e_writereg(LCD_REG_61, 0x020b);
/* Set GRAM area */
stm3210e_writereg(LCD_REG_80, 0x0000); /* Horizontal GRAM Start Address */
stm3210e_writereg(LCD_REG_81, 0x00ef); /* Horizontal GRAM End Address */
stm3210e_writereg(LCD_REG_82, 0x0000); /* Vertical GRAM Start Address */
stm3210e_writereg(LCD_REG_83, 0x013f); /* Vertical GRAM End Address */
stm3210e_writereg(LCD_REG_96, 0x2700); /* Gate Scan Line */
stm3210e_writereg(LCD_REG_97, 0x0001); /* NDL,VLE, REV */
stm3210e_writereg(LCD_REG_106, 0x0000); /* Set scrolling line */
/* Partial Display Control */
stm3210e_writereg(LCD_REG_128, 0x0000);
stm3210e_writereg(LCD_REG_129, 0x0000);
stm3210e_writereg(LCD_REG_130, 0x0000);
stm3210e_writereg(LCD_REG_131, 0x0000);
stm3210e_writereg(LCD_REG_132, 0x0000);
stm3210e_writereg(LCD_REG_133, 0x0000);
/* Panel Control */
stm3210e_writereg(LCD_REG_144, 0x0010);
stm3210e_writereg(LCD_REG_146, 0x0000);
stm3210e_writereg(LCD_REG_147, 0x0003);
stm3210e_writereg(LCD_REG_149, 0x0110);
stm3210e_writereg(LCD_REG_151, 0x0000);
stm3210e_writereg(LCD_REG_152, 0x0000);
/* Set GRAM write direction and BGR = 1
*
* I/D=01 (Horizontal : increment, Vertical : decrement)
* AM=1 (address is updated in vertical writing direction)
*/
stm3210e_writereg(LCD_REG_3, 0x1018);
stm3210e_writereg(LCD_REG_7, 0); /* Display off */
#else
lcddbg("Unsupported LCD type\n");
#endif
}
}
/**************************************************************************************
* Name: stm3210e_backlight
*
* Description:
* The LCD backlight is driven from PA8 which must be configured as TIM1
* CH1. TIM1 must then be configured to output a clock on PA8; the duty
* of the clock determineds the backlight level.
*
**************************************************************************************/
#ifdef CONFIG_LCD_BACKLIGHT
static void stm3210e_backlight(void)
{
uint16_t ccmr;
uint16_t ccer;
uint16_t cr2;
/* Configure PA8 as TIM1 CH1 output */
stm32_configgpio(GPIO_TIM1_CH1OUT);
/* Enabled timer 1 clocking */
modifyreg32(STM32_RCC_APB2ENR, 0, RCC_APB2ENR_TIM1EN);
/* Reset timer 1 */
modifyreg32(STM32_RCC_APB2RSTR, 0, RCC_APB2RSTR_TIM1RST);
modifyreg32(STM32_RCC_APB2RSTR, RCC_APB2RSTR_TIM1RST, 0);
/* Reset the Counter Mode and set the clock division */
putreg16(0, STM32_TIM1_CR1);
/* Set the Autoreload value */
putreg16(LCD_BL_TIMER_PERIOD, STM32_TIM1_ARR);
/* Set the Prescaler value */
putreg16(0, STM32_TIM1_PSC);
/* Reset the Repetition Counter value */
putreg16(0, STM32_TIM1_RCR);
/* Generate an update event to reload the Prescaler value immediatly */
putreg16(ATIM_EGR_UG, STM32_TIM1_EGR);
/* Disable the Channel 1 */
ccer = getreg16(STM32_TIM1_CCER);
ccer &= ~ATIM_CCER_CC1E;
putreg16(ccer, STM32_TIM1_CCER);
/* Get the TIM1 CR2 register value */
cr2 = getreg16(STM32_TIM1_CR2);
/* Select the Output Compare Mode Bits */
ccmr = getreg16(STM32_TIM1_CCMR1);
ccmr &= ATIM_CCMR1_OC1M_MASK;
ccmr |= (ATIM_CCMR_MODE_PWM1 << ATIM_CCMR1_OC1M_SHIFT);
/* Set the capture compare register value (50% duty) */
g_lcddev.power = (CONFIG_LCD_MAXPOWER + 1) / 2;
putreg16((LCD_BL_TIMER_PERIOD + 1) / 2, STM32_TIM1_CCR1);
/* Select the output polarity level == LOW and enable */
ccer |= (ATIM_CCER_CC1E | ATIM_CCER_CC1P);
/* Reset the Output N Polarity level */
ccer &= ~(ATIM_CCER_CC1NP|ATIM_CCER_CC1NE);
/* Reset the Ouput Compare and Output Compare N IDLE State */
cr2 &= ~(ATIM_CR2_OIS1|ATIM_CR2_OIS1N);
/* Write the timer configuration */
putreg16(cr2, STM32_TIM1_CR2);
putreg16(ccmr, STM32_TIM1_CCMR1);
putreg16(ccer, STM32_TIM1_CCER);
/* Set the auto preload enable bit */
modifyreg16(STM32_TIM1_CR1, 0, ATIM_CR1_ARPE);
/* Enable Backlight Timer */
ccer |= ATIM_CR1_CEN;
putreg16(ccer, STM32_TIM1_CCER);
/* Dump timer1 registers */
lcddbg("APB2ENR: %08x\n", getreg32(STM32_RCC_APB2ENR));
lcddbg("CR1: %04x\n", getreg32(STM32_TIM1_CR1));
lcddbg("CR2: %04x\n", getreg32(STM32_TIM1_CR2));
lcddbg("SMCR: %04x\n", getreg32(STM32_TIM1_SMCR));
lcddbg("DIER: %04x\n", getreg32(STM32_TIM1_DIER));
lcddbg("SR: %04x\n", getreg32(STM32_TIM1_SR));
lcddbg("EGR: %04x\n", getreg32(STM32_TIM1_EGR));
lcddbg("CCMR1: %04x\n", getreg32(STM32_TIM1_CCMR1));
lcddbg("CCMR2: %04x\n", getreg32(STM32_TIM1_CCMR2));
lcddbg("CCER: %04x\n", getreg32(STM32_TIM1_CCER));
lcddbg("CNT: %04x\n", getreg32(STM32_TIM1_CNT));
lcddbg("PSC: %04x\n", getreg32(STM32_TIM1_PSC));
lcddbg("ARR: %04x\n", getreg32(STM32_TIM1_ARR));
lcddbg("RCR: %04x\n", getreg32(STM32_TIM1_RCR));
lcddbg("CCR1: %04x\n", getreg32(STM32_TIM1_CCR1));
lcddbg("CCR2: %04x\n", getreg32(STM32_TIM1_CCR2));
lcddbg("CCR3: %04x\n", getreg32(STM32_TIM1_CCR3));
lcddbg("CCR4: %04x\n", getreg32(STM32_TIM1_CCR4));
lcddbg("CCR4: %04x\n", getreg32(STM32_TIM1_CCR4));
lcddbg("CCR4: %04x\n", getreg32(STM32_TIM1_CCR4));
lcddbg("DMAR: %04x\n", getreg32(STM32_TIM1_DMAR));
}
#endif
/**************************************************************************************
* Public Functions
**************************************************************************************/
/**************************************************************************************
* Name: up_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).
*
**************************************************************************************/
int up_lcdinitialize(void)
{
gvdbg("Initializing\n");
/* Configure GPIO pins and configure the FSMC to support the LCD */
stm32_selectlcd();
/* Configure and enable LCD */
up_mdelay(50);
stm3210e_lcdinitialize();
/* Clear the display (setting it to the color 0=black) */
stm3210e_lcdclear(0);
/* Configure the backlight */
stm3210e_backlight();
return OK;
}
/**************************************************************************************
* Name: up_lcdgetdev
*
* Description:
* Return a a reference to the LCD object for the specified LCD. This allows support
* for multiple LCD devices.
*
**************************************************************************************/
FAR struct lcd_dev_s *up_lcdgetdev(int lcddev)
{
DEBUGASSERT(lcddev == 0);
return &g_lcddev.dev;
}
/**************************************************************************************
* Name: up_lcduninitialize
*
* Description:
* Unitialize the LCD support
*
**************************************************************************************/
void up_lcduninitialize(void)
{
stm3210e_setpower(&g_lcddev.dev, 0);
stm32_deselectlcd();
}
/**************************************************************************************
* Name: stm3210e_lcdclear
*
* Description:
* This is a non-standard LCD interface just for the STM3210E-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
* dispaly is cleared by simply setting all GRAM memory to the specified color.
*
**************************************************************************************/
void stm3210e_lcdclear(uint16_t color)
{
uint32_t i = 0;
stm3210e_setcursor(0, STM3210E_XRES-1);
stm3210e_gramselect();
for (i = 0; i < STM3210E_XRES * STM3210E_YRES; i++)
{
LCD->value = color;
}
}
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