stm32f4下spi+dma读取数据不对
本帖最后由 烟雨梦 于 2019-6-13 11:44 编辑STM32F4用的HAL库，SPI3+DMA方式读取25FL512S片子数据，读出来的数据错误，之前没用DMA的时候读出来的数据是对的，为了提高速度换成DMA出现问题了，请大神们帮忙分析下？下面是代码：/* SPI3 init function */
void MX_SPI3_Init(void)
{
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_HIGH;
hspi3.Init.CLKPhase = SPI_PHASE_2EDGE;
hspi3.Init.NSS = SPI_NSS_SOFT;
hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi3.Init.TIMode = SPI_TIMODE_DISABLE;
hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi3.Init.CRCPolynomial = 10;
HAL_SPI_Init(&hspi3);
}
void HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(hspi->Instance==SPI3)
{
/* USER CODE BEGIN SPI3_MspInit 0 */
/* USER CODE END SPI3_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_SPI3_CLK_ENABLE();
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
/**SPI3 GPIO Configuration
PA15 ------> SPI3_NSS1
PD2 ------> SPI3_NSS2
PD0 ------> SPI3_WP
PD1 ------> SPI3_HOLD
PD4 ------> SPI3_RST
PC10 ------> SPI3_SCK
PC11 ------> SPI3_MISO
PC12 ------> SPI3_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
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(GPIOC, &GPIO_InitStruct);
/* SPI3 DMA Init */
/* 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_HIGH;
hdma_spi3_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
hdma_spi3_rx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_spi3_rx.Init.MemBurst = DMA_MBURST_INC4;
hdma_spi3_rx.Init.PeriphBurst = DMA_PBURST_INC4;
HAL_DMA_Init(&hdma_spi3_rx);
__HAL_LINKDMA(hspi,hdmarx,hdma_spi3_rx);
/* 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_MEDIUM;
hdma_spi3_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
hdma_spi3_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_spi3_tx.Init.MemBurst = DMA_MBURST_INC4;
hdma_spi3_tx.Init.PeriphBurst = DMA_PBURST_INC4;
HAL_DMA_Init(&hdma_spi3_tx);
__HAL_LINKDMA(hspi,hdmatx,hdma_spi3_tx);
/* DMA interrupt init */
/* DMA1_Stream0_IRQn interrupt configuration */
//HAL_NVIC_SetPriority(SPI3_IRQn, 6, 0);
//HAL_NVIC_EnableIRQ(SPI3_IRQn);
/* DMA interrupt init */
/* DMA1_Stream0_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Stream0_IRQn, 6, 0);
HAL_NVIC_EnableIRQ(DMA1_Stream0_IRQn);
/* DMA1_Stream5_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Stream5_IRQn, 6, 1);
HAL_NVIC_EnableIRQ(DMA1_Stream5_IRQn);
/* USER CODE BEGIN SPI3_MspInit 1 */
/* USER CODE END SPI3_MspInit 1 */
}
}
void HAL_SPI_MspDeInit(SPI_HandleTypeDef* hspi)
{
if(hspi->Instance==SPI3)
{
/* USER CODE BEGIN SPI3_MspDeInit 0 */
/* USER CODE END SPI3_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_SPI3_CLK_DISABLE();
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_DISABLE();
/**SPI3 GPIO Configuration
PC10 ------> SPI3_SCK
PC11 ------> SPI3_MISO
PC12 ------> SPI3_MOSI
*/
HAL_GPIO_DeInit(GPIOC, GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12);
/* SPI3 DMA DeInit */
HAL_DMA_DeInit(hspi->hdmarx);
/HAL_DMA_DeInit(hspi->hdmatx);
HAL_NVIC_DisableIRQ(DMA1_Stream0_IRQn);
HAL_NVIC_DisableIRQ(DMA1_Stream5_IRQn);
//HAL_NVIC_DisableIRQ(SPI3_IRQn);
/* USER CODE BEGIN SPI3_MspDeInit 1 */
/* USER CODE END SPI3_MspDeInit 1 */
}
}
#include "stm32f4xx_it.c"文件下
/**
* @brief This function handles DMA1 stream0 global interrupt.
*/
void DMA1_Stream0_IRQHandler(void)
{
/* USER CODE BEGIN DMA1_Stream0_IRQn 0 */
/* USER CODE END DMA1_Stream0_IRQn 0 */
HAL_DMA_IRQHandler(&hdma_spi3_rx);
/* USER CODE BEGIN DMA1_Stream0_IRQn 1 */
/* USER CODE END DMA1_Stream0_IRQn 1 */
}
/**
* @brief This function handles DMA1 stream5 global interrupt.
*/
void DMA1_Stream5_IRQHandler(void)
{
/* USER CODE BEGIN DMA1_Stream5_IRQn 0 */
/* USER CODE END DMA1_Stream5_IRQn 0 */
HAL_DMA_IRQHandler(&hdma_spi3_tx);
/* USER CODE BEGIN DMA1_Stream5_IRQn 1 */
/* USER CODE END DMA1_Stream5_IRQn 1 */
}
main函数下定时读取数据调用的函数
void SPI_FLASH_BufferRead(UINT8 chipNum,UINT8* pBuffer, UINT32 ReadAddr, UINT16 NumByteToRead)
{
if(ReadAddr+RX_DATA_LEN <= S25F_FLASH_SIZE)
{
/* 选择芯片 */
SPI_FLASH_Select(chipNum);
/*使能片选*/
SPI_FLASH_CS_ENABLE();
/*发送读数据指令*/
SPI_FLASH_SendByte(S25F_ReadData);
/*发送32位数据地址*/
SPI_FLASH_Send4Bytes(ReadAddr);
if(NumByteToRead> RX_DATA_LEN )
{
NumByteToRead = RX_DATA_LEN ;
}
HAL_SPI_Receive_DMA(&SpiHandle,pBuffer,NumByteToRead);
//取消片选信号
SPI_FLASH_CS_DISABLE();
}
}
HAL_SPI_Receive_DMA这边读出来的数据一直不对，另外我的HAL_SPI_RxCpltCallback函数除了库文件Stm32f4xx_hal_spi.c下，没在别的文件里重新编写。
请各位帮忙分析下什么原因？
你的字节间隔怎么设置的？ wude924 发表于 2019-6-13 14:16
你的字节间隔怎么设置的？
用的库函数HAL_SPI_Receive_DMA(&SpiHandle,pBuffer,NumByteToRead)，这个函数不是一次可以读取固定个长度的字节吗
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