ST SPI DMA接收异常

zhuo1000 提问时间：2015-8-3 15:53 /

问答
是否解决:

芯片：STM32f405,  做的功能是SPI的dma传输，

   st正常接收是这样的，0xAB 0xBA 0xA0 ~~~~~~
   假如出现异常 0x0 0xAB 0xBA 0xA0~~~~~
   出现这种情况，我如何让系统SPI恢复，能正常接收。

附：
附：
void DMA2_Stream0_IRQHandler(void)
{
  GPIOB->BSRRH = GPIO_Pin_5;
  /* Test on DMA Stream Transfer Complete interrupt */
  //if (DMA_GetFlagStatus(SPIx_RX_DMA_STREAM,SPIx_RX_DMA_FLAG_TCIF))
  if(DMA_GetITStatus(SPIx_RX_DMA_STREAM, DMA_IT_TCIF0))
  {
   DMA_ClearITPendingBit(SPIx_RX_DMA_STREAM, DMA_IT_TCIF0);
   DMA_ClearFlag(SPIx_RX_DMA_STREAM,SPIx_RX_DMA_FLAG_TCIF);

         ab =spi_aRxBuffer[0];
         ba =spi_aRxBuffer[1];
         spi_head_cmd =spi_aRxBuffer[2];
   if((ab ==0xAB) &&  (ba ==0xBA ))
            {
               spi_deal_handle(package_status);
                  ab =0;
                  ba =0;
         }
         else  //这是异常处理，但是我发现没有恢复正常
               {
                     dma_reinit();

         }

函数如下：
void dma_reinit(void)
{
   DMA_Cmd(SPIx_RX_DMA_STREAM,DISABLE);
   DMA_ClearFlag(SPIx_RX_DMA_STREAM,DMA_FLAG_TEIF0 | DMA_FLAG_DMEIF0 | DMA_FLAG_FEIF0);

}

void spi_receive_data_enable(void)
{
  DMA_ClearFlag(SPIx_RX_DMA_STREAM,SPIx_RX_DMA_FLAG_TCIF);
  //DMA_DeInit(SPIx_TX_DMA_STREAM);
  DMA_DeInit(SPIx_RX_DMA_STREAM);

  /* Configure DMA Initialization Structure */
  DMA_InitStructure.DMA_BufferSize = SPI_BUFFERSIZE ;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable ;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull ;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_INC4;//DMA_MemoryBurst_Single ;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t) (&(SPIx_WIFI->DR)) ;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  /* Configure TX DMA */
//  DMA_InitStructure.DMA_Channel = SPIx_TX_DMA_CHANNEL ;
//  DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral ;
//  DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)spi_aTxBuffer ;
//  DMA_Init(SPIx_TX_DMA_STREAM, &DMA_InitStructure);
  /* Configure RX DMA */
  DMA_InitStructure.DMA_Channel = SPIx_RX_DMA_CHANNEL ;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory ;
  DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)spi_aRxBuffer ;
  DMA_Init(SPIx_RX_DMA_STREAM, &DMA_InitStructure);

SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;
SPI_Init(SPIx_WIFI, &SPI_InitStructure);
         //DMA_ClearFlag(SPIx_RX_DMA_STREAM,SPIx_RX_DMA_FLAG_TCIF);
      DMA_ITConfig(SPIx_RX_DMA_STREAM, DMA_IT_TC, ENABLE); //wyz add
      DMA_Cmd(SPIx_RX_DMA_STREAM,ENABLE);
      SPI_I2S_DMACmd(SPIx_WIFI, SPI_I2S_DMAReq_Rx, ENABLE);
      SPI_Cmd(SPIx_WIFI, ENABLE);
}
  spi_receive_data_enable();


  }
}