关于STM32F429的SPI的DMA传输问题
配置已经截图，现在是这样，上述配置下，用HAL_SPI_Transmit(&hspi3, txbuff, 1, 1000);发送没有任何问题正常，现在用HAL_SPI_Transmit_DMA(&hspi3, (uint8_t*)txbuff, sizeof(txbuff));或者// HAL_SPI_TransmitReceive_DMA(&hspi3,(uint8_t*)txbuff,(uint8_t*)rxbuff,(sizeof(txbuff)/sizeof(uint16_t)));这两个函数发送数据，在总线上没有任何数据，也没有任何波形，SPI中断也开了，但是DMA就是发不出去数据，这是什么原因void MX_SPI3_Init(void)
{
/* USER CODE BEGIN SPI3_Init 0 */
/* USER CODE END SPI3_Init 0 */
/* USER CODE BEGIN SPI3_Init 1 */
/* USER CODE END SPI3_Init 1 */
hspi3.Instance = SPI3;
hspi3.Init.Mode = SPI_MODE_MASTER;
hspi3.Init.Direction = SPI_DIRECTION_2LINES;
hspi3.Init.DataSize = SPI_DATASIZE_8BIT;
hspi3.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi3.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi3.Init.NSS = SPI_NSS_SOFT;
hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_32;
hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi3.Init.TIMode = SPI_TIMODE_DISABLE;
hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi3.Init.CRCPolynomial = 10;
if (HAL_SPI_Init(&hspi3) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN SPI3_Init 2 */
/* USER CODE END SPI3_Init 2 */
}
void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(spiHandle->Instance==SPI1)
{
/* USER CODE BEGIN SPI1_MspInit 0 */
/* USER CODE END SPI1_MspInit 0 */
/* SPI1 clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/**SPI1 GPIO Configuration
PA5 ------> SPI1_SCK
PA6 ------> SPI1_MISO
PA7 ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
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_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN SPI1_MspInit 1 */
/* USER CODE END SPI1_MspInit 1 */
}
else if(spiHandle->Instance==SPI3)
{
/* USER CODE BEGIN SPI3_MspInit 0 */
/* USER CODE END SPI3_MspInit 0 */
/* SPI3 clock enable */
__HAL_RCC_SPI3_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**SPI3 GPIO Configuration
PB3 ------> SPI3_SCK
PB4 ------> SPI3_MISO
PB5 ------> SPI3_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF6_SPI3;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* SPI3 DMA Init */
/* SPI3_TX Init */
hdma_spi3_tx.Instance = DMA1_Stream5;
hdma_spi3_tx.Init.Channel = DMA_CHANNEL_0;
hdma_spi3_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_spi3_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi3_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi3_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi3_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_spi3_tx.Init.Mode = DMA_NORMAL;
hdma_spi3_tx.Init.Priority = DMA_PRIORITY_LOW;
hdma_spi3_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_spi3_tx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(spiHandle,hdmatx,hdma_spi3_tx);
/* SPI3_RX Init */
hdma_spi3_rx.Instance = DMA1_Stream0;
hdma_spi3_rx.Init.Channel = DMA_CHANNEL_0;
hdma_spi3_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_spi3_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_spi3_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_spi3_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
hdma_spi3_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
hdma_spi3_rx.Init.Mode = DMA_NORMAL;
hdma_spi3_rx.Init.Priority = DMA_PRIORITY_LOW;
hdma_spi3_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
if (HAL_DMA_Init(&hdma_spi3_rx) != HAL_OK)
{
Error_Handler();
}
__HAL_LINKDMA(spiHandle,hdmarx,hdma_spi3_rx);
/* SPI3 interrupt Init */
HAL_NVIC_SetPriority(SPI3_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(SPI3_IRQn);
/* USER CODE BEGIN SPI3_MspInit 1 */
/* USER CODE END SPI3_MspInit 1 */
}
}
中断开了
跟这个帖子的内容是不是重复了
https://www.armbbs.cn/forum.php?mod=viewthread&tid=122460
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