/* * 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 #ifdef BSP_USING_LCD #include #include "lcd.h" #include "drv_gpio.h" #define DRV_DEBUG #define LOG_TAG "drv.lcd" #include #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 */