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- /*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date Author Notes
- * 2021-10-14 spaceman first version
- */
- #include <board.h>
- #ifdef BSP_USING_LCD
- #include <lcd_port.h>
- #include "lcd.h"
- #include "drv_gpio.h"
- #define DRV_DEBUG
- #define LOG_TAG "drv.lcd"
- #include <drv_log.h>
- #define LCD_DEVICE(dev) (struct drv_lcd_device*)(dev)
- static __align(256) volatile rt_uint32_t LTDC_Buf1[LCD_WIDTH * LCD_HEIGHT] = {0x00};
- static __align(256) volatile rt_uint32_t LTDC_Buf2[LCD_WIDTH * LCD_HEIGHT] = {0x00};
- 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;
- }
- 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 */
- _lcd.lcd_info.framebuffer = _lcd.back_buf;
- /* Configure the color frame buffer start address */
- LTDC->DP_SWT = 0;
- _lcd.cur_buf = 0;
- }
- else
- {
- /* front_buf is being used */
- _lcd.lcd_info.framebuffer = _lcd.front_buf;
- /* Configure the color frame buffer start address */
- LTDC->DP_SWT = 1;
- _lcd.cur_buf = 1;
- }
- rt_sem_take(&_lcd.lcd_lock, RT_TICK_PER_SECOND / 20);
- }
- 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 = LCD_BITS_PER_PIXEL;
- info->width = lcd->lcd_info.width;
- info->height = lcd->lcd_info.height;
- info->framebuffer = lcd->lcd_info.framebuffer;
- }
- break;
- }
- return RT_EOK;
- }
- rt_err_t stm32_lcd_init(struct drv_lcd_device *lcd)
- {
- LCD_Initial((rt_uint32_t)lcd->front_buf, (rt_uint32_t)lcd->back_buf);
- 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
- void Lcd_ColorBox(struct drv_lcd_device *lcd, rt_uint16_t xStart, rt_uint16_t yStart, rt_uint16_t xLong, rt_uint16_t yLong, rt_uint32_t Color)
- {
- rt_uint16_t i, j;
- rt_uint32_t temp;
- rt_uint32_t *LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
- temp = lcd->lcd_info.height * xStart;
- for (i = 0; i < yLong; i++)
- {
- for (j = 0; j < xLong; j++)
- LTDC_Buf[yStart + i + lcd->lcd_info.height * j + temp] = Color;
- }
- lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
- }
- void LCD_Fill_Pic(struct drv_lcd_device *lcd, rt_uint16_t x, rt_uint16_t y, rt_uint16_t pic_H, rt_uint16_t pic_V, rt_uint32_t *pic)
- {
- rt_uint32_t *LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
- rt_uint16_t i, j;
- rt_uint32_t Xstart, k = 0;
- Xstart = lcd->lcd_info.height * x;
- for (i = 0; i < pic_V; i++)
- {
- for (j = 0; j < pic_H; j++)
- LTDC_Buf[Xstart + i + lcd->lcd_info.height * j + y] = pic[k++];
- }
- }
- void DrawPixel(struct drv_lcd_device *lcd, rt_uint16_t x, rt_uint16_t y, int Color)
- {
- rt_uint32_t *LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
- LTDC_Buf[y + lcd->lcd_info.height * x] = Color;
- }
- int drv_lcd_hw_init(void)
- {
- rt_err_t result = RT_EOK;
- struct rt_device *device = &_lcd.parent;
- /* memset _lcd to zero */
- rt_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.back_buf = (rt_uint8_t *)LTDC_Buf1;
- _lcd.front_buf = (rt_uint8_t *)LTDC_Buf2;
- _lcd.lcd_info.framebuffer = _lcd.back_buf;
- 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 */
- rt_memset(_lcd.back_buf, 0xFF, LCD_BUF_SIZE);
- rt_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;
- device->control = drv_lcd_control;
- #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();
- }
- LOG_D("lcd register successful!");
- __exit:
- if (result != RT_EOK)
- {
- rt_sem_detach(&_lcd.lcd_lock);
- }
- return result;
- }
- INIT_DEVICE_EXPORT(drv_lcd_hw_init);
- #ifdef DRV_DEBUG
- #ifdef FINSH_USING_MSH
- int lcd_test()
- {
- struct drv_lcd_device *lcd;
- lcd = (struct drv_lcd_device *)rt_device_find("lcd");
- if(lcd == RT_NULL)
- {
- LOG_E("find lcd device failed!\n");
- return -1;
- }
- rt_uint32_t *LTDC_Buf = RT_NULL;
- LOG_D("red");
- /* red */
- LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
- for (int i = 0; i < LCD_BUF_SIZE / 4; i++)
- LTDC_Buf[i] = Red;
- lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
- rt_thread_mdelay(1000);
- LOG_D("green");
- /* green */
- LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
- for (int i = 0; i < LCD_BUF_SIZE / 4; i++)
- LTDC_Buf[i] = Green;
- lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
- rt_thread_mdelay(1000);
- LOG_D("blue");
- /* blue */
- LTDC_Buf = (rt_uint32_t *)lcd->lcd_info.framebuffer;
- for (int i = 0; i < LCD_BUF_SIZE / 4; i++)
- LTDC_Buf[i] = Blue;
- lcd->parent.control(&lcd->parent, RTGRAPHIC_CTRL_RECT_UPDATE, RT_NULL);
- return 0;
- }
- MSH_CMD_EXPORT(lcd_test, lcd_test);
- #endif /* FINSH_USING_MSH */
- #endif /* DRV_DEBUG */
- #endif /* BSP_USING_LCD */
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