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nuttx/boards/arm/stm32/stm3240g-eval/src/stm32_lcd.c
Alin Jerpelea c481a5b7ac boards: stm32: update licenses to Apache 
Gregory Nutt is the copyright holder for those files and he has submitted the
SGA as a result we can migrate the licenses to Apache.

Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
2021-08-16 07:11:32 -07:00

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/****************************************************************************
* boards/arm/stm32/stm3240g-eval/src/stm32_lcd.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.
*
****************************************************************************/
/* This driver supports the following LCDs on the STM324xG_EVAL board:
*
* AM-240320L8TNQW00H (LCD_ILI9320 or LCD_ILI9321) OR
* AM-240320D5TOQW01H (LCD_ILI9325)
*/
/****************************************************************************
* 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/board.h>
#include <nuttx/spi/spi.h>
#include <nuttx/lcd/lcd.h>
#include <arch/board/board.h>
#include "arm_arch.h"
#include "stm32.h"
#include "stm3240g-eval.h"
#if !defined(CONFIG_STM3240G_ILI9320_DISABLE) || !defined(CONFIG_STM3240G_ILI9325_DISABLE)
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
/* CONFIG_STM3240G_ILI9320_DISABLE may be defined to disabled the
* AM-240320L8TNQW00H(LCD_ILI9320 or LCD_ILI9321)
* CONFIG_STM3240G_ILI9325_DISABLE may be defined to disabled the
* AM-240320D5TOQW01H(LCD_ILI9325)
*/
/* 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 STM3240G_XRES 320
# define STM3240G_YRES 240
#else
# define STM3240G_XRES 240
# define STM3240G_YRES 320
#endif
/* Color depth and format */
#define STM3240G_BPP 16
#define STM3240G_COLORFMT FB_FMT_RGB16_565
/* STM3240G-EVAL LCD Hardware Definitions ***********************************/
/* LCD /CS is CE4, Bank 3 of NOR/SRAM Bank 1~4 */
#define STM3240G_LCDBASE ((uintptr_t)(0x60000000 | 0x08000000))
#define LCD ((struct lcd_regs_s *)STM3240G_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_164 0xa4
#define LCD_REG_192 0xc0
#define LCD_REG_193 0xc1
#define LCD_REG_229 0xe5
/* LCD IDs */
#define ILI9320_ID 0x9320
#define ILI9321_ID 0x9321
#define ILI9325_ID 0x9325
/****************************************************************************
* Private Type Definition
****************************************************************************/
/* LCD type */
enum lcd_type_e
{
LCD_TYPE_UNKNOWN = 0,
LCD_TYPE_ILI9320,
LCD_TYPE_ILI9325
};
/* 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 stm3240g_dev_s
{
/* Publicly 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 stm3240g_writereg(uint8_t regaddr, uint16_t regval);
static uint16_t stm3240g_readreg(uint8_t regaddr);
static inline void stm3240g_gramselect(void);
static inline void stm3240g_writegram(uint16_t rgbval);
static void stm3240g_readnosetup(FAR uint16_t *accum);
static uint16_t stm3240g_readnoshift(FAR uint16_t *accum);
static void stm3240g_setcursor(uint16_t col, uint16_t row);
/* LCD Data Transfer Methods */
static int stm3240g_putrun(fb_coord_t row, fb_coord_t col,
FAR const uint8_t *buffer, size_t npixels);
static int stm3240g_getrun(fb_coord_t row, fb_coord_t col,
FAR uint8_t *buffer, size_t npixels);
/* LCD Configuration */
static int stm3240g_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo);
static int stm3240g_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 stm3240g_getpower(struct lcd_dev_s *dev);
static int stm3240g_setpower(struct lcd_dev_s *dev, int power);
static int stm3240g_getcontrast(struct lcd_dev_s *dev);
static int stm3240g_setcontrast(struct lcd_dev_s *dev,
unsigned int contrast);
/* Initialization */
static inline void stm3240g_lcdinitialize(void);
/****************************************************************************
* 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[STM3240G_XRES];
/* This structure describes the overall LCD video controller */
static const struct fb_videoinfo_s g_videoinfo =
{
.fmt = STM3240G_COLORFMT, /* Color format: RGB16-565: RRRR RGGG GGGB BBBB */
.xres = STM3240G_XRES, /* Horizontal resolution in pixel columns */
.yres = STM3240G_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 = stm3240g_putrun, /* Put a run into LCD memory */
.getrun = stm3240g_getrun, /* Get a run from LCD memory */
.buffer = (uint8_t *)g_runbuffer, /* Run scratch buffer */
.bpp = STM3240G_BPP, /* Bits-per-pixel */
};
/* This is the standard, NuttX LCD driver object */
static struct stm3240g_dev_s g_lcddev =
{
.dev =
{
/* LCD Configuration */
.getvideoinfo = stm3240g_getvideoinfo,
.getplaneinfo = stm3240g_getplaneinfo,
/* LCD RGB Mapping -- Not supported */
/* Cursor Controls -- Not supported */
/* LCD Specific Controls */
.getpower = stm3240g_getpower,
.setpower = stm3240g_setpower,
.getcontrast = stm3240g_getcontrast,
.setcontrast = stm3240g_setcontrast,
},
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: stm3240g_writereg
*
* Description:
* Write to an LCD register
*
****************************************************************************/
static void stm3240g_writereg(uint8_t regaddr, uint16_t regval)
{
/* Write the register address then write the register value */
LCD->address = regaddr;
LCD->value = regval;
}
/****************************************************************************
* Name: stm3240g_readreg
*
* Description:
* Read from an LCD register
*
****************************************************************************/
static uint16_t stm3240g_readreg(uint8_t regaddr)
{
/* Write the register address then read the register value */
LCD->address = regaddr;
return LCD->value;
}
/****************************************************************************
* Name: stm3240g_gramselect
*
* Description:
* Setup to read or write multiple pixels to the GRAM memory
*
****************************************************************************/
static inline void stm3240g_gramselect(void)
{
LCD->address = LCD_REG_34;
}
/****************************************************************************
* Name: stm3240g_writegram
*
* Description:
* Write one pixel to the GRAM memory
*
****************************************************************************/
static inline void stm3240g_writegram(uint16_t rgbval)
{
/* Write the value (GRAM register already selected) */
LCD->value = rgbval;
}
/****************************************************************************
* Name: stm3240g_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:
*
* - ILI932x: Discard first dummy read; no shift in the return data
*
****************************************************************************/
static void stm3240g_readnosetup(FAR uint16_t *accum)
{
/* Read-ahead one pixel */
*accum = LCD->value;
}
/****************************************************************************
* Name: stm3240g_readnoshift
*
* 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
*
****************************************************************************/
static uint16_t stm3240g_readnoshift(FAR uint16_t *accum)
{
/* Read the value (GRAM register already selected) */
return LCD->value;
}
/****************************************************************************
* Name: stm3240g_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 stm3240g_setcursor(uint16_t col, uint16_t row)
{
stm3240g_writereg(LCD_REG_32, row); /* GRAM horizontal address */
stm3240g_writereg(LCD_REG_33, col); /* GRAM vertical address */
}
/****************************************************************************
* Name: stm3240g_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 stm3240g_dumprun(FAR const char *msg,
FAR uint16_t *run, size_t npixels)
{
int i;
int j;
syslog(LOG_DEBUG, "\n%s:\n", msg);
for (i = 0; i < npixels; i += 16)
{
up_putc(' ');
syslog(LOG_DEBUG, " ");
for (j = 0; j < 16; j++)
{
syslog(LOG_DEBUG, " %04x", *run++);
}
up_putc('\n');
}
}
#endif
/****************************************************************************
* Name: stm3240g_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 stm3240g_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 */
lcdinfo("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 -- 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 */
stm3240g_setcursor(col, row);
stm3240g_gramselect();
stm3240g_writegram(*src++);
/* Increment to 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 = (STM3240G_XRES - 1) - col;
row = (STM3240G_YRES - 1) - row;
/* Set the cursor position */
stm3240g_setcursor(col, row);
/* Then write the GRAM data, auto-decrementing X */
stm3240g_gramselect();
for (i = 0; i < npixels; i++)
{
/* Write the next pixel to this position
* (auto-decrements to the next column)
*/
stm3240g_writegram(*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 = (STM3240G_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 */
stm3240g_setcursor(row, col);
stm3240g_gramselect();
stm3240g_writegram(*src++);
/* Increment to 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 = (STM3240G_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 */
stm3240g_setcursor(row, col);
stm3240g_gramselect();
stm3240g_writegram(*src++);
/* Decrement to next column */
col++;
}
#endif
return OK;
}
/****************************************************************************
* Name: stm3240g_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 stm3240g_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 */
lcdinfo("row: %d col: %d npixels: %d\n", row, col, npixels);
DEBUGASSERT(buffer && ((uintptr_t)buffer & 1) == 0);
/* Configure according to the LCD type.
* Kind of silly with only one LCD type.
*/
switch (g_lcddev.type)
{
case LCD_TYPE_ILI9320:
case LCD_TYPE_ILI9325:
readsetup = stm3240g_readnosetup;
readgram = stm3240g_readnoshift;
break;
default: /* Shouldn't happen */
return -ENOSYS;
}
/* 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 */
stm3240g_setcursor(row, col);
stm3240g_gramselect();
readsetup(&accum);
*dest++ = readgram(&accum);
/* Increment to 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 = (STM3240G_XRES - 1) - col;
row = (STM3240G_YRES - 1) - row;
/* Set the cursor position */
stm3240g_setcursor(col, row);
/* Then read the GRAM data, auto-decrementing Y */
stm3240g_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.
* 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 = (STM3240G_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 */
stm3240g_setcursor(row, col);
stm3240g_gramselect();
readsetup(&accum);
*dest++ = readgram(&accum);
/* Increment to 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 = (STM3240G_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 */
stm3240g_setcursor(row, col);
stm3240g_gramselect();
readsetup(&accum);
*dest++ = readgram(&accum);
/* Decrement to next column */
col++;
}
#endif
return OK;
}
/****************************************************************************
* Name: stm3240g_getvideoinfo
*
* Description:
* Get information about the LCD video controller configuration.
*
****************************************************************************/
static int stm3240g_getvideoinfo(FAR struct lcd_dev_s *dev,
FAR struct fb_videoinfo_s *vinfo)
{
DEBUGASSERT(dev && vinfo);
lcdinfo("fmt: %d xres: %d yres: %d nplanes: %d\n",
g_videoinfo.fmt, g_videoinfo.xres,
g_videoinfo.yres, g_videoinfo.nplanes);
memcpy(vinfo, &g_videoinfo, sizeof(struct fb_videoinfo_s));
return OK;
}
/****************************************************************************
* Name: stm3240g_getplaneinfo
*
* Description:
* Get information about the configuration of each LCD color plane.
*
****************************************************************************/
static int stm3240g_getplaneinfo(FAR struct lcd_dev_s *dev,
unsigned int planeno,
FAR struct lcd_planeinfo_s *pinfo)
{
DEBUGASSERT(dev && pinfo && planeno == 0);
lcdinfo("planeno: %d bpp: %d\n", planeno, g_planeinfo.bpp);
memcpy(pinfo, &g_planeinfo, sizeof(struct lcd_planeinfo_s));
return OK;
}
/****************************************************************************
* Name: stm3240g_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 stm3240g_getpower(struct lcd_dev_s *dev)
{
lcdinfo("power: %d\n", 0);
return g_lcddev.power;
}
/****************************************************************************
* Name: stm3240g_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 stm3240g_poweroff(void)
{
/* Turn the display off */
stm3240g_writereg(LCD_REG_7, 0);
/* Remember the power off state */
g_lcddev.power = 0;
return OK;
}
/****************************************************************************
* Name: stm3240g_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 stm3240g_setpower(struct lcd_dev_s *dev, int power)
{
lcdinfo("power: %d\n", power);
DEBUGASSERT((unsigned)power <= CONFIG_LCD_MAXPOWER);
/* Set new power level */
if (power > 0)
{
/* Then turn the display on */
#if !defined(CONFIG_STM3240G_ILI9320_DISABLE) || !defined(CONFIG_STM3240G_ILI9325_DISABLE)
stm3240g_writereg(LCD_REG_7, 0x0173);
#endif
g_lcddev.power = power;
}
else
{
/* Turn the display off */
stm3240g_poweroff();
}
return OK;
}
/****************************************************************************
* Name: stm3240g_getcontrast
*
* Description:
* Get the current contrast setting (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int stm3240g_getcontrast(struct lcd_dev_s *dev)
{
lcdinfo("Not implemented\n");
return -ENOSYS;
}
/****************************************************************************
* Name: stm3240g_setcontrast
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static int stm3240g_setcontrast(struct lcd_dev_s *dev, unsigned int contrast)
{
lcdinfo("contrast: %d\n", contrast);
return -ENOSYS;
}
/****************************************************************************
* Name: stm3240g_lcdinitialize
*
* Description:
* Set LCD panel contrast (0-CONFIG_LCD_MAXCONTRAST).
*
****************************************************************************/
static inline void stm3240g_lcdinitialize(void)
{
uint16_t id;
/* Check LCD ID */
id = stm3240g_readreg(LCD_REG_0);
lcdinfo("LCD ID: %04x\n", id);
/* Check if the ID is for the STM32_ILI9320 (or ILI9321) or STM32_ILI9325 */
#if !defined(CONFIG_STM3240G_ILI9320_DISABLE) && !defined(CONFIG_STM3240G_ILI9325_DISABLE)
if (id == ILI9320_ID || id == ILI9321_ID || id == ILI9325_ID)
#elif !defined(CONFIG_STM3240G_ILI9320_DISABLE) && defined(CONFIG_STM3240G_ILI9325_DISABLE)
if (id == ILI9320_ID || id == ILI9321_ID)
#else /* if defined(CONFIG_STM3240G_ILI9320_DISABLE) && !defined(CONFIG_STM3240G_ILI9325_DISABLE)) */
if (id == ILI9325_ID)
#endif
{
/* Save the LCD type
* (not actually used at for anything important)
*/
#if !defined(CONFIG_STM3240G_ILI9320_DISABLE)
# if !defined(CONFIG_STM3240G_ILI9325_DISABLE)
if (id == ILI9325_ID)
{
g_lcddev.type = LCD_TYPE_ILI9325;
}
else
# endif
{
g_lcddev.type = LCD_TYPE_ILI9320;
stm3240g_writereg(LCD_REG_229, 0x8000); /* Set the internal vcore voltage */
}
#else /* if !defined(CONFIG_STM3240G_ILI9325_DISABLE) */
g_lcddev.type = LCD_TYPE_ILI9325;
#endif
lcdinfo("LCD type: %d\n", g_lcddev.type);
/* Start Initial Sequence */
stm3240g_writereg(LCD_REG_0, 0x0001); /* Start internal OSC. */
stm3240g_writereg(LCD_REG_1, 0x0100); /* Set SS and SM bit */
stm3240g_writereg(LCD_REG_2, 0x0700); /* Set 1 line inversion */
stm3240g_writereg(LCD_REG_3, 0x1030); /* Set GRAM write direction and BGR=1. */
/* stm3240g_writereg(LCD_REG_3, 0x1018);
* Set GRAM write direction and BGR=1.
*/
stm3240g_writereg(LCD_REG_4, 0x0000); /* Resize register */
stm3240g_writereg(LCD_REG_8, 0x0202); /* Set the back porch and front porch */
stm3240g_writereg(LCD_REG_9, 0x0000); /* Set non-display area refresh cycle ISC[3:0] */
stm3240g_writereg(LCD_REG_10, 0x0000); /* FMARK function */
stm3240g_writereg(LCD_REG_12, 0x0000); /* RGB interface setting */
stm3240g_writereg(LCD_REG_13, 0x0000); /* Frame marker Position */
stm3240g_writereg(LCD_REG_15, 0x0000); /* RGB interface polarity */
/* Power On sequence */
stm3240g_writereg(LCD_REG_16, 0x0000); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
stm3240g_writereg(LCD_REG_17, 0x0000); /* DC1[2:0], DC0[2:0], VC[2:0] */
stm3240g_writereg(LCD_REG_18, 0x0000); /* VREG1OUT voltage */
stm3240g_writereg(LCD_REG_19, 0x0000); /* VDV[4:0] for VCOM amplitude */
up_mdelay(200); /* Dis-charge capacitor power voltage (200ms) */
stm3240g_writereg(LCD_REG_16, 0x17b0); /* SAP, BT[3:0], AP, DSTB, SLP, STB */
stm3240g_writereg(LCD_REG_17, 0x0137); /* DC1[2:0], DC0[2:0], VC[2:0] */
up_mdelay(50);
stm3240g_writereg(LCD_REG_18, 0x0139); /* VREG1OUT voltage */
up_mdelay(50);
stm3240g_writereg(LCD_REG_19, 0x1d00); /* VDV[4:0] for VCOM amplitude */
stm3240g_writereg(LCD_REG_41, 0x0013); /* VCM[4:0] for VCOMH */
up_mdelay(50);
stm3240g_writereg(LCD_REG_32, 0x0000); /* GRAM horizontal Address */
stm3240g_writereg(LCD_REG_33, 0x0000); /* GRAM Vertical Address */
/* Adjust the Gamma Curve (ILI9320/1) */
#if !defined(CONFIG_STM3240G_ILI9320_DISABLE)
# if !defined(CONFIG_STM3240G_ILI9325_DISABLE)
if (g_lcddev.type == LCD_TYPE_ILI9320)
# endif
{
stm3240g_writereg(LCD_REG_48, 0x0006);
stm3240g_writereg(LCD_REG_49, 0x0101);
stm3240g_writereg(LCD_REG_50, 0x0003);
stm3240g_writereg(LCD_REG_53, 0x0106);
stm3240g_writereg(LCD_REG_54, 0x0b02);
stm3240g_writereg(LCD_REG_55, 0x0302);
stm3240g_writereg(LCD_REG_56, 0x0707);
stm3240g_writereg(LCD_REG_57, 0x0007);
stm3240g_writereg(LCD_REG_60, 0x0600);
stm3240g_writereg(LCD_REG_61, 0x020b);
}
#endif
/* Adjust the Gamma Curve (ILI9325) */
#if !defined(CONFIG_STM3240G_ILI9325_DISABLE)
# if !defined(CONFIG_STM3240G_ILI9320_DISABLE)
else
# endif
{
stm3240g_writereg(LCD_REG_48, 0x0007);
stm3240g_writereg(LCD_REG_49, 0x0302);
stm3240g_writereg(LCD_REG_50, 0x0105);
stm3240g_writereg(LCD_REG_53, 0x0206);
stm3240g_writereg(LCD_REG_54, 0x0808);
stm3240g_writereg(LCD_REG_55, 0x0206);
stm3240g_writereg(LCD_REG_56, 0x0504);
stm3240g_writereg(LCD_REG_57, 0x0007);
stm3240g_writereg(LCD_REG_60, 0x0105);
stm3240g_writereg(LCD_REG_61, 0x0808);
}
#endif
/* Set GRAM area */
stm3240g_writereg(LCD_REG_80, 0x0000); /* Horizontal GRAM Start Address */
stm3240g_writereg(LCD_REG_81, 0x00ef); /* Horizontal GRAM End Address */
stm3240g_writereg(LCD_REG_82, 0x0000); /* Vertical GRAM Start Address */
stm3240g_writereg(LCD_REG_83, 0x013f); /* Vertical GRAM End Address */
stm3240g_writereg(LCD_REG_96, 0x2700); /* Gate Scan Line */
/* stm3240g_writereg(LCD_REG_96, 0xa700);
* Gate Scan Line(GS=1, scan direction is G320~G1)
*/
stm3240g_writereg(LCD_REG_97, 0x0001); /* NDL,VLE, REV */
stm3240g_writereg(LCD_REG_106, 0x0000); /* Set scrolling line */
/* Partial Display Control */
stm3240g_writereg(LCD_REG_128, 0x0000);
stm3240g_writereg(LCD_REG_129, 0x0000);
stm3240g_writereg(LCD_REG_130, 0x0000);
stm3240g_writereg(LCD_REG_131, 0x0000);
stm3240g_writereg(LCD_REG_132, 0x0000);
stm3240g_writereg(LCD_REG_133, 0x0000);
/* Panel Control */
stm3240g_writereg(LCD_REG_144, 0x0010);
stm3240g_writereg(LCD_REG_146, 0x0000);
stm3240g_writereg(LCD_REG_147, 0x0003);
stm3240g_writereg(LCD_REG_149, 0x0110);
stm3240g_writereg(LCD_REG_151, 0x0000);
stm3240g_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)
*/
stm3240g_writereg(LCD_REG_3, 0x1018);
stm3240g_writereg(LCD_REG_7, 0); /* Display off */
}
else
{
lcderr("ERROR: Unsupported LCD type\n");
}
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_lcd_initialize
*
* 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 board_lcd_initialize(void)
{
lcdinfo("Initializing\n");
/* Configure GPIO pins and configure the FSMC to support the LCD */
stm32_selectlcd();
/* Configure and enable LCD */
up_mdelay(50);
stm3240g_lcdinitialize();
/* Clear the display (setting it to the color 0=black) */
stm3240g_lcdclear(0);
/* Turn the display off */
stm3240g_poweroff();
return OK;
}
/****************************************************************************
* Name: board_lcd_getdev
*
* 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 *board_lcd_getdev(int lcddev)
{
DEBUGASSERT(lcddev == 0);
return &g_lcddev.dev;
}
/****************************************************************************
* Name: board_lcd_uninitialize
*
* Description:
* Uninitialize the LCD support
*
****************************************************************************/
void board_lcd_uninitialize(void)
{
stm3240g_poweroff();
stm32_deselectlcd();
}
/****************************************************************************
* Name: stm3240g_lcdclear
*
* 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 stm3240g_lcdclear(uint16_t color)
{
uint32_t i = 0;
stm3240g_setcursor(0, STM3240G_XRES - 1);
stm3240g_gramselect();
for (i = 0; i < STM3240G_XRES * STM3240G_YRES; i++)
{
LCD->value = color;
}
}
#endif /* !CONFIG_STM3240G_ILI9320_DISABLE || !CONFIG_STM3240G_ILI9325_DISABLE */
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