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调试STM32H750 SPI DMA程序，参考STM32H7库例程的SPI DMA双机通信的例子。只在一个板子调试把MISO和MOSI连接到一起。现在问题是不开Cache能正常收到数据，开了Cache就收不到数据，MPU也配置了。
收发数据函数调佣：
if(HAL_SPI_TransmitReceive_DMA(&hspi1, (uint8_t*)buffer_tx, (uint8_t *)buffer_rx, 64) != HAL_OK)
{
/* Transfer error in transmission process */
Error_Handler();
}
MPU配置如下：
void MPU_Config(void)
{
MPU_Region_InitTypeDef MPU_InitStruct = {0};
/* Disables the MPU */
HAL_MPU_Disable();
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Enable = MPU_REGION_ENABLE;
MPU_InitStruct.Number = MPU_REGION_NUMBER0;
MPU_InitStruct.BaseAddress = 0x24000000;
MPU_InitStruct.Size = MPU_REGION_SIZE_512KB;
MPU_InitStruct.SubRegionDisable = 0x0;
MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;
MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;
MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/* Enables the MPU */
HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
}
DMA配置：
hdma_spi1_tx.Instance = DMA2_Stream3;
hdma_spi1_tx.Init.Request = DMA_REQUEST_SPI1_TX;
hdma_spi1_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_spi1_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi1_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi1_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi1_tx.Init.MemDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi1_tx.Init.Mode = DMA_NORMAL;
hdma_spi1_tx.Init.Priority = DMA_PRIORITY_LOW;
hdma_spi1_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_spi1_tx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(spiHandle,hdmatx,hdma_spi1_tx);
/* SPI1_RX Init */
hdma_spi1_rx.Instance = DMA2_Stream2;
hdma_spi1_rx.Init.Request = DMA_REQUEST_SPI1_RX;
hdma_spi1_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_spi1_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi1_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi1_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi1_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_spi1_rx.Init.Mode = DMA_NORMAL;
hdma_spi1_rx.Init.Priority = DMA_PRIORITY_HIGH;
hdma_spi1_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
/* DMA interrupt init */
/* DMA2_Stream2_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Stream2_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream2_IRQn);
/* DMA2_Stream3_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Stream3_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
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发表于 2021-9-26 17:50:41
