STM32H750XBH6 RT-Thread 点亮LCD

1万 · 2021-7-3 09:36

前言

自己买的ART-Pi板，一直没有时间去玩转，今天有点时间，打算让它跑跑GUI.
这次点亮的是ART-Pi三件套里的多媒体板上的LCD，通过原理图查看，是个SPI屏
没有使用ART-Pi的BSP工程

配置与调试

驱动ART-Pi自带的屏，需要通过menuconfig，配置一下

1万 · 2021-7-3 09:37

需要通过menuconfig关闭板载的LCD
编译，下载运行，发现，LCD无法点亮，开机卡个半死，提示SPI通信失败，【白屏】。

1万 · 2021-7-3 09:39

Warning: There is no enough buffer for saving async log, please increase the ULOG_ASYNC_OUTPUT_BUF_SIZE option.
[1322] I/drv.spi: spi transfer error : 1
[1322] I/drv.spi_lcd: lcd_write_cmd error. 0
[2322] I/drv.spi: spi transfer error : 1
[2322] I/drv.spi_lcd: lcd_write_data error. 0
[3322] I/drv.spi: spi transfer error : 1
[3322] I/drv.spi_lcd: lcd_write_data error. 0
[4322] I/drv.spi: spi transfer error : 1
[4322] I/drv.spi_lcd: lcd_write_data error. 0

1万 · 2021-7-3 09:40

查看SPI驱动，暂时没发现问题，通过软件调试，发现SPI无法正常的发送
查看SPI引脚配置，发现问题，没有配置SPI2的引脚
通过STM32CubeMX配置SPI2的引脚，会更新：stm32h7xx_hal_msp.c
可以通过ART-Pi官网提供的例程里，把SPI2的引脚配置复制过来
/**
* @brief SPI MSP Initialization
* This function configures the hardware resources used in this example
* @param hspi: SPI handle pointer
* @retval None
*/
void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(hspi->Instance==SPI1)
  {
  /* USER CODE BEGIN SPI1_MspInit 0 */

  /* USER CODE END SPI1_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();

__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**SPI1 GPIO Configuration
PB5    ------> SPI1_MOSI
PG9    ------> SPI1_MISO
PA5    ------> SPI1_SCK
*/
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* USER CODE BEGIN SPI1_MspInit 1 */

  /* USER CODE END SPI1_MspInit 1 */
  }
  else if(hspi->Instance==SPI2) /* ART-Pi SPI LCD的引脚配置 */
  {
  /* USER CODE BEGIN SPI2_MspInit 0 */

  /* USER CODE END SPI2_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI2_CLK_ENABLE();

__HAL_RCC_GPIOI_CLK_ENABLE();
/**SPI2 GPIO Configuration
PI1    ------> SPI2_SCK
PI2    ------> SPI2_MISO
PI3    ------> SPI2_MOSI
   */
GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);

/* SPI2 interrupt Init */
HAL_NVIC_SetPriority(SPI2_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(SPI2_IRQn);
  /* USER CODE BEGIN SPI2_MspInit 1 */

  /* USER CODE END SPI2_MspInit 1 */
  }
  else if(hspi->Instance==SPI4)
  {
  /* USER CODE BEGIN SPI4_MspInit 0 */

  /* USER CODE END SPI4_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI4_CLK_ENABLE();

__HAL_RCC_GPIOE_CLK_ENABLE();
/**SPI4 GPIO Configuration
PE2    ------> SPI4_SCK
PE5    ------> SPI4_MISO
PE6    ------> SPI4_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_5|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI4;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);

  /* USER CODE BEGIN SPI4_MspInit 1 */

  /* USER CODE END SPI4_MspInit 1 */
  }
}

1万 · 2021-7-3 09:41

重新编译下载运行，发现LCD可以成功的点亮了

通过代码查看，LCD驱动运行的是：drv_spi_ili9488.c里面的

1万 · 2021-7-3 09:42

总结

遇到问题，先软件调试，认真分析，对比总结，就会有解决问题的思路
ART-Pi资源丰富，可以用于进一步的学习与研究