RT-Thread ART-PI 学习笔记：轻量化GUI框架LVGL的使用和配置

Posted 2021-09-06 张竞豪

前言

本文记录RT-Thread官方开发板ART-PI配置和使用LVGL图形库的过程

旨在以ART-PI学习LVGL，但是在配置的过程中遇到不少问题，ART-PI对LVGL的适配并没有TOUCHGFX那么好，还存在不少问题，其中一些还有待解决

以这篇博客作为记录配置和使用过程，之后有时间会完善这篇博客

参考资料

https://club.rt-thread.org/ask/article/2464.html

https://blog.csdn.net/weixin_37127273/article/details/110134225

https://www.jianshu.com/p/e01bf5b628bc

实验步骤

https://github.com/RT-Thread-Studio/sdk-bsp-stm32h750-realthread-artpi/blob/master/documents/board/ART-Pi_HW_V1.5/ART-Pi_SCH_V1.5_Release.pdf

#include "drv_common.h"
#define GT9147_IRQ_PIN GET_PIN(G,12)
#define GT9147_RST_PIN GET_PIN(D,3)

int rt_hw_gt9147_port(void)
{
    struct rt_touch_config config;
    rt_uint8_t rst;

    rst = GT9147_RST_PIN;
    config.dev_name = "i2c1";
    config.irq_pin.pin  = GT9147_IRQ_PIN;
    config.irq_pin.mode = PIN_MODE_INPUT_PULLDOWN;
    config.user_data = &rst;

    rt_hw_gt9147_init("gt", &config);

    return 0;
}
INIT_DEVICE_EXPORT(rt_hw_gt9147_port);

void touch_init(void)
{
    gt9147_sample("gt",800,480);
}

INIT_APP_EXPORT(touch_init);

别忘了加头文件

#include "littlevgl2rtt.h"

#define TOUCH_LCD_WIDTH  800
#define TOUCH_LCD_HEIGHT 480

static void gt9147_entry(void *parameter)
{
    uint16_t x;
    uint16_t y;
    
    rt_device_control(dev, RT_TOUCH_CTRL_GET_INFO, &info);

    read_data = (struct rt_touch_data *)rt_malloc(sizeof(struct rt_touch_data) * info.point_num);

    while (1)
    {
        rt_sem_take(gt9147_sem, RT_WAITING_FOREVER);

        if (rt_device_read(dev, 0, read_data, info.point_num) == info.point_num)
        {
            for (rt_uint8_t i = 0; i < info.point_num; i++)
            {
                x = TOUCH_LCD_WIDTH-(uint16_t)read_data[i].x_coordinate;
                y = TOUCH_LCD_HEIGHT-(uint16_t)read_data[i].y_coordinate;
                littlevgl2rtt_send_input_event(x,y,read_data[i].event);
                if (read_data[i].event == RT_TOUCH_EVENT_DOWN || read_data[i].event == RT_TOUCH_EVENT_MOVE)
                {
//                    rt_kprintf("%d %d %d %d %d\\n", read_data[i].track_id,
//                               read_data[i].x_coordinate,
//                               read_data[i].y_coordinate,
//                               read_data[i].timestamp,
//                               read_data[i].width);
                    rt_kprintf("(%d,%d)\\n",x,y);
                }
            }
        }
        rt_device_control(dev, RT_TOUCH_CTRL_ENABLE_INT, RT_NULL);
    }
}

下面是启用DMA2D提高LVGL的屏幕刷新率，但是最后出现白屏的现象不知道为什么，有待解决

/**
* @brief DMA2D MSP Initialization
* This function configures the hardware resources used in this example
* @param hdma2d: DMA2D handle pointer
* @retval None
*/
void HAL_DMA2D_MspInit(DMA2D_HandleTypeDef* hdma2d)
{
  if(hdma2d->Instance==DMA2D)
  {
  /* USER CODE BEGIN DMA2D_MspInit 0 */

  /* USER CODE END DMA2D_MspInit 0 */
    /* Peripheral clock enable */
    __HAL_RCC_DMA2D_CLK_ENABLE();
    /* DMA2D interrupt Init */
    HAL_NVIC_SetPriority(DMA2D_IRQn, 0, 0);
    HAL_NVIC_EnableIRQ(DMA2D_IRQn);
  /* USER CODE BEGIN DMA2D_MspInit 1 */

  /* USER CODE END DMA2D_MspInit 1 */
  }

}

/**
* @brief DMA2D MSP De-Initialization
* This function freeze the hardware resources used in this example
* @param hdma2d: DMA2D handle pointer
* @retval None
*/
void HAL_DMA2D_MspDeInit(DMA2D_HandleTypeDef* hdma2d)
{
  if(hdma2d->Instance==DMA2D)
  {
  /* USER CODE BEGIN DMA2D_MspDeInit 0 */

  /* USER CODE END DMA2D_MspDeInit 0 */
    /* Peripheral clock disable */
    __HAL_RCC_DMA2D_CLK_DISABLE();

    /* DMA2D interrupt DeInit */
    HAL_NVIC_DisableIRQ(DMA2D_IRQn);
  /* USER CODE BEGIN DMA2D_MspDeInit 1 */

  /* USER CODE END DMA2D_MspDeInit 1 */
  }

}

DMA2D_HandleTypeDef hdma2d;

static void MX_DMA2D_Init(void)
{

  /* USER CODE BEGIN DMA2D_Init 0 */

  /* USER CODE END DMA2D_Init 0 */

  /* USER CODE BEGIN DMA2D_Init 1 */

  /* USER CODE END DMA2D_Init 1 */
  hdma2d.Instance = DMA2D;
  hdma2d.Init.Mode = DMA2D_M2M;
  hdma2d.Init.ColorMode = DMA2D_OUTPUT_RGB565;
  hdma2d.Init.OutputOffset = 0;

  hdma2d.LayerCfg[1].InputOffset = 0;
  hdma2d.LayerCfg[1].InputColorMode = DMA2D_INPUT_RGB565;
  hdma2d.LayerCfg[1].AlphaMode = DMA2D_NO_MODIF_ALPHA;
  hdma2d.LayerCfg[1].InputAlpha = 0;
  hdma2d.LayerCfg[1].AlphaInverted = DMA2D_REGULAR_ALPHA;
  hdma2d.LayerCfg[1].RedBlueSwap = DMA2D_RB_REGULAR;
  hdma2d.LayerCfg[1].ChromaSubSampling = DMA2D_NO_CSS;
  if (HAL_DMA2D_Init(&hdma2d) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_DMA2D_ConfigLayer(&hdma2d, 1) != HAL_OK)
  {
    Error_Handler();
  }
  /* USER CODE BEGIN DMA2D_Init 2 */

  /* USER CODE END DMA2D_Init 2 */
}

drv_lcd_hw_init()

littlevgl2rtt_init

    lv_color_t *buf1 = rt_malloc(sizeof(lv_color_t)*LV_HOR_RES_MAX*LV_VER_RES_MAX);
    rt_memset(buf1, 0, sizeof(lv_color_t)*LV_HOR_RES_MAX*LV_VER_RES_MAX);

    lv_color_t *buf2 = rt_malloc(sizeof(lv_color_t)*LV_HOR_RES_MAX*LV_VER_RES_MAX);
    rt_memset(buf2, 0, sizeof(lv_color_t)*LV_HOR_RES_MAX*LV_VER_RES_MAX);

``