基于rt-thread与stm32f405rgt6驱动 240x320的st7789v TFT屏

步骤一

到https://gitee.com/rtthread/rt-thread/tree/gitee_master/bsp/stm32/stm32l475-atk-pandora/board/ports/lcd
中拷贝drv_lcd.c , drv_lcd.h， lcd_font.h文件到工程中，

步骤二修改LCD_Driver.c文件部分内容

根据个人的硬件电路修改引脚，分辨率

#define LCD_DC_PIN            GET_PIN(A, 2)
#define LCD_RES_PIN           GET_PIN(A, 1)
#define LCD_BL_PIN            GET_PIN(A, 0)

#ifndef BSP_USING_LVGL
#define LCD_CLEAR_SEND_NUMBER 76800 /* 320*240 */

static int rt_hw_lcd_config(void)
{
    spi_dev_lcd = (struct rt_spi_device *)rt_device_find("spi10");
    __HAL_RCC_GPIOA_CLK_ENABLE();

    rt_hw_spi_device_attach("spi1", "spi10", GPIOA, GPIO_PIN_3);
    lcd_gpio_init();


    /* config spi */
    {
        struct rt_spi_configuration cfg = {0};
        cfg.data_width = 8;
        cfg.mode = RT_SPI_MASTER | RT_SPI_MODE_0 | RT_SPI_MSB;
        cfg.max_hz = 42 * 1000 * 1000; /* 42M,SPI max 42MHz,lcd 4-wire spi */

        rt_spi_configure(spi_dev_lcd, &cfg);
    }

    return RT_EOK;
}

static void lcd_gpio_init(void)
{
    rt_hw_lcd_config();

    rt_pin_mode(LCD_DC_PIN, PIN_MODE_OUTPUT);
    rt_pin_mode(LCD_RES_PIN, PIN_MODE_OUTPUT);
    rt_pin_mode(LCD_BL_PIN, PIN_MODE_OUTPUT);
    rt_pin_write(LCD_RES_PIN, PIN_LOW);

    //wait at least 100ms for reset
    rt_thread_delay(RT_TICK_PER_SECOND / 10);
    rt_pin_write(LCD_RES_PIN, PIN_HIGH);
    rt_thread_delay(RT_TICK_PER_SECOND / 10);
}

void lcd_display_on(void)
{
    rt_pin_write(LCD_BL_PIN, PIN_HIGH);
}

void lcd_display_off(void)
{
    rt_pin_write(LCD_BL_PIN, PIN_LOW);
}

以上是我给人根据自己的硬件所做的修改

步骤三完成spi配置

按照rt-thread 的提示完成以上四小步，然后编译，理论上可以编译通过了，可以lcd_clear(BLACK);清个屏试试看

拓展

可以读取sd卡中.bmp文件，用lcd_fill_array接口显示图片。
可以参考

rt_uint8_t play_bin(const char *path)
{
    struct stat file_stat;

    rt_uint16_t fd;
    rt_uint32_t res, i;

    fd = open(path, O_RDONLY);

    if (fd != -1)
    {
        rt_kprintf("fd is = %d...\n", fd);
        stat(path, &file_stat);
        rt_kprintf("%ld\n", file_stat.st_size);
        Psize = (rt_uint8_t *) malloc(file_stat.st_size);
        Psize = (rt_uint8_t *) malloc(38410);

        for (uint16_t i = 0; i < 161; i++)
        {
            rt_kprintf("i = %d.\n", i);
            read(fd, Psize, 38410);

            rt_sem_release(dynamic_sem);  //释放信号

            // rt_thread_mdelay(1);
            // lcd_send(Psize, 0, 0, 160, 120);
        }

//            read(fd, Psize, file_stat.st_size/2);
//            lcd_send(Psize, 0, 90, 240, 180);
        //  lcd_clear(RED);

//            while (!flag)
//                ;
//            flag = 0;

    }

    return 1;
}