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rt-thread-official/bsp/stm32/libraries/HAL_Drivers/drv_lcd.c

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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2019-01-08 zylx first version
*/
#include <board.h>
#ifdef BSP_USING_LCD
#include <lcd_port.h>
#include <rtdevice.h>
#include <string.h>
#define DRV_DEBUG
#define LOG_TAG "drv.lcd"
#include <drv_log.h>
#define LCD_DEVICE(dev) (struct drv_lcd_device *)(dev)
LTDC_HandleTypeDef LtdcHandle = {0};
struct drv_lcd_device
{
struct rt_device parent;
struct rt_device_graphic_info lcd_info;
struct rt_semaphore lcd_lock;
/* 0:front_buf is being used 1: back_buf is being used*/
rt_uint8_t cur_buf;
rt_uint8_t *front_buf;
rt_uint8_t *back_buf;
};
struct drv_lcd_device _lcd;
static rt_err_t drv_lcd_init(struct rt_device *device)
{
struct drv_lcd_device *lcd = LCD_DEVICE(device);
/* nothing, right now */
lcd = lcd;
return RT_EOK;
}
#ifndef ART_PI_TouchGFX_LIB
static rt_err_t drv_lcd_control(struct rt_device *device, int cmd, void *args)
{
struct drv_lcd_device *lcd = LCD_DEVICE(device);
switch (cmd)
{
case RTGRAPHIC_CTRL_RECT_UPDATE:
{
/* update */
if (_lcd.cur_buf)
{
/* back_buf is being used */
memcpy(_lcd.front_buf, _lcd.lcd_info.framebuffer, LCD_BUF_SIZE);
/* Configure the color frame buffer start address */
LTDC_LAYER(&LtdcHandle, 0)->CFBAR &= ~(LTDC_LxCFBAR_CFBADD);
LTDC_LAYER(&LtdcHandle, 0)->CFBAR = (uint32_t)(_lcd.front_buf);
_lcd.cur_buf = 0;
}
else
{
/* front_buf is being used */
memcpy(_lcd.back_buf, _lcd.lcd_info.framebuffer, LCD_BUF_SIZE);
/* Configure the color frame buffer start address */
LTDC_LAYER(&LtdcHandle, 0)->CFBAR &= ~(LTDC_LxCFBAR_CFBADD);
LTDC_LAYER(&LtdcHandle, 0)->CFBAR = (uint32_t)(_lcd.back_buf);
_lcd.cur_buf = 1;
}
rt_sem_take(&_lcd.lcd_lock, RT_TICK_PER_SECOND / 20);
HAL_LTDC_Relaod(&LtdcHandle, LTDC_SRCR_VBR);
}
break;
case RTGRAPHIC_CTRL_GET_INFO:
{
struct rt_device_graphic_info *info = (struct rt_device_graphic_info *)args;
RT_ASSERT(info != RT_NULL);
info->pixel_format = lcd->lcd_info.pixel_format;
info->bits_per_pixel = 16;
info->width = lcd->lcd_info.width;
info->height = lcd->lcd_info.height;
info->framebuffer = lcd->lcd_info.framebuffer;
}
break;
default:
return -RT_EINVAL;
}
return RT_EOK;
}
void HAL_LTDC_ReloadEventCallback(LTDC_HandleTypeDef *hltdc)
{
/* emable line interupt */
__HAL_LTDC_ENABLE_IT(&LtdcHandle, LTDC_IER_LIE);
}
void HAL_LTDC_LineEventCallback(LTDC_HandleTypeDef *hltdc)
{
rt_sem_release(&_lcd.lcd_lock);
}
#endif
void LTDC_IRQHandler(void)
{
rt_interrupt_enter();
HAL_LTDC_IRQHandler(&LtdcHandle);
rt_interrupt_leave();
}
rt_err_t stm32_lcd_init(struct drv_lcd_device *lcd)
{
LTDC_LayerCfgTypeDef pLayerCfg = {0};
/* LTDC Initialization -------------------------------------------------------*/
/* Polarity configuration */
/* Initialize the horizontal synchronization polarity as active low */
LtdcHandle.Init.HSPolarity = LTDC_HSPOLARITY_AL;
/* Initialize the vertical synchronization polarity as active low */
LtdcHandle.Init.VSPolarity = LTDC_VSPOLARITY_AL;
/* Initialize the data enable polarity as active low */
LtdcHandle.Init.DEPolarity = LTDC_DEPOLARITY_AL;
/* Initialize the pixel clock polarity as input pixel clock */
LtdcHandle.Init.PCPolarity = LTDC_PCPOLARITY_IPC;
/* Timing configuration */
/* Horizontal synchronization width = Hsync - 1 */
LtdcHandle.Init.HorizontalSync = LCD_HSYNC_WIDTH - 1;
/* Vertical synchronization height = Vsync - 1 */
LtdcHandle.Init.VerticalSync = LCD_VSYNC_HEIGHT - 1;
/* Accumulated horizontal back porch = Hsync + HBP - 1 */
LtdcHandle.Init.AccumulatedHBP = LCD_HSYNC_WIDTH + LCD_HBP - 1;
/* Accumulated vertical back porch = Vsync + VBP - 1 */
LtdcHandle.Init.AccumulatedVBP = LCD_VSYNC_HEIGHT + LCD_VBP - 1;
/* Accumulated active width = Hsync + HBP + Active Width - 1 */
LtdcHandle.Init.AccumulatedActiveW = LCD_HSYNC_WIDTH + LCD_HBP + lcd->lcd_info.width - 1;
/* Accumulated active height = Vsync + VBP + Active Heigh - 1 */
LtdcHandle.Init.AccumulatedActiveH = LCD_VSYNC_HEIGHT + LCD_VBP + lcd->lcd_info.height - 1;
/* Total height = Vsync + VBP + Active Heigh + VFP - 1 */
LtdcHandle.Init.TotalHeigh = LtdcHandle.Init.AccumulatedActiveH + LCD_VFP;
/* Total width = Hsync + HBP + Active Width + HFP - 1 */
LtdcHandle.Init.TotalWidth = LtdcHandle.Init.AccumulatedActiveW + LCD_HFP;
/* Configure R,G,B component values for LCD background color */
LtdcHandle.Init.Backcolor.Blue = 0;
LtdcHandle.Init.Backcolor.Green = 0;
LtdcHandle.Init.Backcolor.Red = 0;
LtdcHandle.Instance = LTDC;
/* Layer1 Configuration ------------------------------------------------------*/
/* Windowing configuration */
pLayerCfg.WindowX0 = 0;
pLayerCfg.WindowX1 = lcd->lcd_info.width;
pLayerCfg.WindowY0 = 0;
pLayerCfg.WindowY1 = lcd->lcd_info.height;
/* Pixel Format configuration*/
if (lcd->lcd_info.pixel_format == RTGRAPHIC_PIXEL_FORMAT_RGB565)
{
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB565;
}
else if (lcd->lcd_info.pixel_format == RTGRAPHIC_PIXEL_FORMAT_ARGB888)
{
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_ARGB8888;
}
else if (lcd->lcd_info.pixel_format == RTGRAPHIC_PIXEL_FORMAT_RGB888)
{
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB888;
}
else if (lcd->lcd_info.pixel_format == RTGRAPHIC_PIXEL_FORMAT_RGB888)
{
pLayerCfg.PixelFormat = LTDC_PIXEL_FORMAT_RGB888;
}
else
{
LOG_E("unsupported pixel format");
return -RT_ERROR;
}
/* Start Address configuration : frame buffer is located at FLASH memory */
pLayerCfg.FBStartAdress = (uint32_t)lcd->front_buf;
/* Alpha constant (255 totally opaque) */
pLayerCfg.Alpha = 255;
/* Default Color configuration (configure A,R,G,B component values) */
pLayerCfg.Alpha0 = 0;
pLayerCfg.Backcolor.Blue = 0;
pLayerCfg.Backcolor.Green = 0;
pLayerCfg.Backcolor.Red = 0;
/* Configure blending factors */
/* Constant Alpha value: pLayerCfg.Alpha / 255
C: Current Layer Color
Cs: Background color
BC = Constant Alpha x C + (1 - Constant Alpha ) x Cs */
/* BlendingFactor1: Pixel Alpha x Constant Alpha */
pLayerCfg.BlendingFactor1 = LTDC_BLENDING_FACTOR1_CA;
/* BlendingFactor2: 1 - (Pixel Alpha x Constant Alpha) */
pLayerCfg.BlendingFactor2 = LTDC_BLENDING_FACTOR2_CA;
/* Configure the number of lines and number of pixels per line */
pLayerCfg.ImageWidth = lcd->lcd_info.width;
pLayerCfg.ImageHeight = lcd->lcd_info.height;
/* Configure the LTDC */
if (HAL_LTDC_Init(&LtdcHandle) != HAL_OK)
{
LOG_E("LTDC init failed");
return -RT_ERROR;
}
/* Configure the Background Layer*/
if (HAL_LTDC_ConfigLayer(&LtdcHandle, &pLayerCfg, 0) != HAL_OK)
{
LOG_E("LTDC layer init failed");
return -RT_ERROR;
}
else
{
/* enable LTDC interrupt */
HAL_NVIC_SetPriority(LTDC_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(LTDC_IRQn);
LOG_D("LTDC init success");
return RT_EOK;
}
}
#if defined(LCD_BACKLIGHT_USING_PWM)
void turn_on_lcd_backlight(void)
{
struct rt_device_pwm *pwm_dev;
/* turn on the LCD backlight */
pwm_dev = (struct rt_device_pwm *)rt_device_find(LCD_PWM_DEV_NAME);
/* pwm frequency:100K = 10000ns */
rt_pwm_set(pwm_dev, LCD_PWM_DEV_CHANNEL, 10000, 10000);
rt_pwm_enable(pwm_dev, LCD_PWM_DEV_CHANNEL);
}
#elif defined(LCD_BACKLIGHT_USING_GPIO)
void turn_on_lcd_backlight(void)
{
rt_pin_mode(LCD_BL_GPIO_NUM, PIN_MODE_OUTPUT);
rt_pin_mode(LCD_DISP_GPIO_NUM, PIN_MODE_OUTPUT);
rt_pin_write(LCD_DISP_GPIO_NUM, PIN_HIGH);
rt_pin_write(LCD_BL_GPIO_NUM, PIN_HIGH);
}
#else
void turn_on_lcd_backlight(void)
{
}
#endif
#ifdef RT_USING_DEVICE_OPS
const static struct rt_device_ops lcd_ops =
{
drv_lcd_init,
RT_NULL,
RT_NULL,
RT_NULL,
RT_NULL,
drv_lcd_control
};
#endif
int drv_lcd_hw_init(void)
{
rt_err_t result = RT_EOK;
struct rt_device *device = &_lcd.parent;
/* memset _lcd to zero */
memset(&_lcd, 0x00, sizeof(_lcd));
/* init lcd_lock semaphore */
result = rt_sem_init(&_lcd.lcd_lock, "lcd_lock", 0, RT_IPC_FLAG_FIFO);
if (result != RT_EOK)
{
LOG_E("init semaphore failed!\n");
result = -RT_ENOMEM;
goto __exit;
}
/* config LCD dev info */
_lcd.lcd_info.height = LCD_HEIGHT;
_lcd.lcd_info.width = LCD_WIDTH;
_lcd.lcd_info.bits_per_pixel = LCD_BITS_PER_PIXEL;
_lcd.lcd_info.pixel_format = LCD_PIXEL_FORMAT;
/* malloc memory for Triple Buffering */
_lcd.lcd_info.framebuffer = rt_malloc_align(LCD_BUF_SIZE, LCD_BUF_SIZE);
_lcd.back_buf = rt_malloc_align(LCD_BUF_SIZE, LCD_BUF_SIZE);
_lcd.front_buf = rt_malloc_align(LCD_BUF_SIZE, LCD_BUF_SIZE);
if (_lcd.lcd_info.framebuffer == RT_NULL || _lcd.back_buf == RT_NULL || _lcd.front_buf == RT_NULL)
{
LOG_E("init frame buffer failed!\n");
result = -RT_ENOMEM;
goto __exit;
}
/* memset buff to 0xFF */
memset(_lcd.lcd_info.framebuffer, 0xFF, LCD_BUF_SIZE);
memset(_lcd.back_buf, 0xFF, LCD_BUF_SIZE);
memset(_lcd.front_buf, 0xFF, LCD_BUF_SIZE);
device->type = RT_Device_Class_Graphic;
#ifdef RT_USING_DEVICE_OPS
device->ops = &lcd_ops;
#else
device->init = drv_lcd_init;
#ifndef ART_PI_TouchGFX_LIB
device->control = drv_lcd_control;
#endif
#endif
/* register lcd device */
rt_device_register(device, "lcd", RT_DEVICE_FLAG_RDWR);
/* init stm32 LTDC */
if (stm32_lcd_init(&_lcd) != RT_EOK)
{
result = -RT_ERROR;
goto __exit;
}
else
{
turn_on_lcd_backlight();
}
__exit:
if (result != RT_EOK)
{
rt_sem_detach(&_lcd.lcd_lock);
if (_lcd.lcd_info.framebuffer)
{
rt_free(_lcd.lcd_info.framebuffer);
}
if (_lcd.back_buf)
{
rt_free(_lcd.back_buf);
}
if (_lcd.front_buf)
{
rt_free(_lcd.front_buf);
}
}
return result;
}
INIT_DEVICE_EXPORT(drv_lcd_hw_init);
#ifndef ART_PI_TouchGFX_LIB
#ifdef DRV_DEBUG
#ifdef FINSH_USING_MSH
int lcd_test()
{
struct drv_lcd_device *lcd;
lcd = (struct drv_lcd_device *)rt_device_find("lcd");
while (1)
{
if (lcd->lcd_info.pixel_format == RTGRAPHIC_PIXEL_FORMAT_RGB565)
{
/* red */
for (int i = 0; i < LCD_BUF_SIZE / 2; i++)
{
lcd->lcd_info.framebuffer[2 * i] = 0x00;
lcd->lcd_info.framebuffer[2 * i + 1] = 0xF8;
}
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
rt_thread_mdelay(1000);
/* green */
for (int i = 0; i < LCD_BUF_SIZE / 2; i++)
{
lcd->lcd_info.framebuffer[2 * i] = 0xE0;
lcd->lcd_info.framebuffer[2 * i + 1] = 0x07;
}
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
rt_thread_mdelay(1000);
/* blue */
for (int i = 0; i < LCD_BUF_SIZE / 2; i++)
{
lcd->lcd_info.framebuffer[2 * i] = 0x1F;
lcd->lcd_info.framebuffer[2 * i + 1] = 0x00;
}
}
else if (lcd->lcd_info.pixel_format == RTGRAPHIC_PIXEL_FORMAT_RGB888)
{
/* red */
for (int i = 0; i < LCD_BUF_SIZE / 3; i++)
{
lcd->lcd_info.framebuffer[3 * i] = 0x00;
lcd->lcd_info.framebuffer[3 * i + 1] = 0x00;
lcd->lcd_info.framebuffer[3 * i + 2] = 0xff;
}
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
rt_thread_mdelay(1000);
/* green */
for (int i = 0; i < LCD_BUF_SIZE / 3; i++)
{
lcd->lcd_info.framebuffer[3 * i] = 0x00;
lcd->lcd_info.framebuffer[3 * i + 1] = 0xff;
lcd->lcd_info.framebuffer[3 * i + 2] = 0x00;
}
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
rt_thread_mdelay(1000);
/* blue */
for (int i = 0; i < LCD_BUF_SIZE / 3; i++)
{
lcd->lcd_info.framebuffer[3 * i] = 0xff;
lcd->lcd_info.framebuffer[3 * i + 1] = 0x00;
lcd->lcd_info.framebuffer[3 * i + 2] = 0x00;
}
}
lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
rt_thread_mdelay(1000);
}
}
MSH_CMD_EXPORT(lcd_test, lcd_test);
#endif /* FINSH_USING_MSH */
#endif /* DRV_DEBUG */
#endif /* BSP_USING_LCD */
#endif
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