Preface
- I bought the ART-Pi board, and I have never had time to play around. I have some time today and I plan to let it run the GUI.
- This time it’s the LCD on the multimedia board in the ART-Pi three-piece suit, which is a SPI screen when viewed through the schematic diagram.
- BSP project without ART-Pi
Configuration and debugging
- To drive the built-in screen of ART-Pi, you need to configure it through menuconfig
- Need to turn off the onboard LCD through menuconfig
- Compile, download and run, and found that the LCD cannot be lit, the boot card is half dead, and it prompts SPI communication failure, [white screen].
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
- Check the SPI driver, no problem is found for the time being. Through software debugging, it is found that SPI cannot be sent normally.
- Check the SPI pin configuration, find the problem, the pin of SPI2 is not configured
- Configure the pins of SPI2 through STM32CubeMX, it will be updated: stm32h7xx_hal_msp.c
- You can copy the pin configuration of SPI2 in the routine provided by the ART-Pi official website
/**
* @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 */
}
}
- Recompile, download and run, and found that the LCD can be successfully lit
- Through the code view, the LCD driver is running:
drv_spi_ili9488.cinside
to sum up
- If you encounter a problem, firstly debug the software, analyze carefully, compare and summarize, then you will have the idea to solve the problem.
- ART-Pi is rich in resources and can be used for further study and research