stm32f2 spi从模式使用DMA传输，不停进中断？郁闷了！求指点

只看该作者 · 2013-3-16 00:27

如题，主机端使用103的片子配置成spi主模式，从机端使用f205 DMA方式收发，但是只要从机这段进入了相应的中断，就不停的进入，而且进去了以后我查看中断悬起位还是0。中断悬起位是0，竟然还会进中断。比较郁闷，求指点。
附上代码



static  DMA_InitTypeDef    DMA_InitStructureTx;

static  DMA_InitTypeDef    DMA_InitStructureRx;



static  SPI_InitTypeDef  SPI_InitStructure;



static void NVIC_Configuration(void)

{

   NVIC_InitTypeDef NVIC_InitStructure;



  /* Configure the SPI interrupt priority */

  NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream2_IRQn;//spi1 rx;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);



  /* Configure the SPI interrupt priority */

  NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream3_IRQn;//spi1 tx;

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);        

}



static void SPI_RCC_GPIO_Config(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;



   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE); 

   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); 

 

  /*!< Connect SPI pins to AF5 */  

  GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_SPI1);

  GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);

  GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);

  GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);        

  // NSS CLK MISO 

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;

        

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;



  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

        

  /* MOSI         

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_7;

  GPIO_Init(GPIOA, &GPIO_InitStructure);

 */

  /* SPI configuration -------------------------------------------------------*/

  SPI_I2S_DeInit(SPI1);

  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;

  SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;                

  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;        

  

  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;

  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;

  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;

  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;

  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

  SPI_InitStructure.SPI_CRCPolynomial = 7;

  

  SPI_CalculateCRC(SPI1,DISABLE);

  SPI_Init(SPI1, &SPI_InitStructure);



  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);

  SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE);

        

  SPI_Cmd(SPI1, ENABLE);                /* 使能SPI  */

}



void DMA_Config(void)

{



        //发送通道

        DMA_DeInit(DMA2_Stream3);

        DMA_InitStructureTx.DMA_Channel = DMA_Channel_3;

        DMA_InitStructureTx.DMA_PeripheralBaseAddr =(u32)&SPI1->DR;//SPI1的DR寄存器地址

        DMA_InitStructureTx.DMA_Memory0BaseAddr = 0;//(u32)SPI1_TX_Buf;

        DMA_InitStructureTx.DMA_DIR = DMA_DIR_MemoryToPeripheral;  

        DMA_InitStructureTx.DMA_BufferSize = 1;

        DMA_InitStructureTx.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

        DMA_InitStructureTx.DMA_MemoryInc = DMA_MemoryInc_Enable;  //DMA内存地址自动增加模式

        DMA_InitStructureTx.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

        DMA_InitStructureTx.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

        DMA_InitStructureTx.DMA_Mode = DMA_Mode_Normal;    

        DMA_InitStructureTx.DMA_Priority = DMA_Priority_Low;

    DMA_InitStructureTx.DMA_FIFOMode = DMA_FIFOMode_Disable;

    DMA_InitStructureTx.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;

    DMA_InitStructureTx.DMA_MemoryBurst = DMA_MemoryBurst_Single;

    DMA_InitStructureTx.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;        

        DMA_Init(DMA2_Stream3, &DMA_InitStructureTx);



         DMA_ITConfig(DMA2_Stream3, DMA_IT_TC, ENABLE);

     DMA_Cmd(DMA2_Stream3, DISABLE);



        //接收通道

        DMA_DeInit(DMA2_Stream2);

        DMA_InitStructureRx.DMA_Channel = DMA_Channel_3;

        DMA_InitStructureRx.DMA_PeripheralBaseAddr =(u32)&SPI1->DR;//SPI2的DR寄存器地址

        DMA_InitStructureRx.DMA_Memory0BaseAddr = 0;//(u32)SPI2_RX_Buf;

        DMA_InitStructureRx.DMA_DIR = DMA_DIR_PeripheralToMemory;  

        DMA_InitStructureRx.DMA_BufferSize = 10;

        DMA_InitStructureRx.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

        DMA_InitStructureRx.DMA_MemoryInc = DMA_MemoryInc_Enable;  //DMA内存地址自动增加模式

        DMA_InitStructureRx.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

        DMA_InitStructureRx.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

        DMA_InitStructureRx.DMA_Mode = DMA_Mode_Normal;    

        DMA_InitStructureRx.DMA_Priority = DMA_Priority_High;

    DMA_InitStructureRx.DMA_FIFOMode = DMA_FIFOMode_Disable;

    DMA_InitStructureRx.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;

    DMA_InitStructureRx.DMA_MemoryBurst = DMA_MemoryBurst_Single;

    DMA_InitStructureRx.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;                

        DMA_Init(DMA2_Stream2, &DMA_InitStructureRx);



    /* Enable SPI DMA Tx request */



     DMA_ITConfig(DMA2_Stream2, DMA_IT_TC, ENABLE);

     DMA_Cmd(DMA2_Stream2, DISABLE);

         

                 DMA_ClearFlag(DMA2_Stream2,DMA_FLAG_TCIF2);      //清DMA发送完成标志

        DMA_ClearFlag(DMA2_Stream3,DMA_FLAG_TCIF3);      //清DMA发送完成标志



}

int dummy[2];

//dir =0 接收data   = 1 发送pcm

void DMA_Transmit(u32 addr, u32 size, u8 dir)

{

        if (dir==1)

        {//发送 tx

                DMA_Cmd(DMA2_Stream3, DISABLE);



                DMA_InitStructureTx.DMA_Memory0BaseAddr = addr;

                DMA_InitStructureTx.DMA_BufferSize = size;

                DMA_Init(DMA2_Stream3, &DMA_InitStructureTx);

        

                DMA_Cmd(DMA2_Stream3, ENABLE);

        }

        else

        {//接收 rx

                DMA_Cmd(DMA2_Stream2, DISABLE);



                DMA_InitStructureRx.DMA_Memory0BaseAddr = addr;

                DMA_InitStructureRx.DMA_BufferSize = size;

                DMA_Init(DMA2_Stream2, &DMA_InitStructureRx);

                

                DMA_Cmd(DMA2_Stream2, ENABLE);

        }        

}





unsigned char SPI_TX_Buf[10005];

unsigned char SPI_RX_Buf[10005];



void rt_hw_spi_init(void)

{

        SPI_RCC_GPIO_Config();

        NVIC_Configuration();

        DMA_Config();



        DMA_Transmit((u32)SPI_RX_Buf, sizeof(SPI_RX_Buf)-5, 0);

}







void DMA2_Stream2_IRQHandler(void)//rx  主机发送

{



  /* Check the interrupt source */

  if (DMA_GetITStatus(DMA2_Stream2,DMA_FLAG_TCIF2)==SET)

  {

             DMA_ClearITPendingBit(DMA2_Stream2,DMA_FLAG_TCIF2|DMA_FLAG_TEIF2);

    

      DMA_Cmd(DMA2_Stream2, DISABLE);

          rt_kprintf(" spi rx done!\r\n");

        

  }

}



void DMA2_Stream3_IRQHandler(void)//tx   主机接收

{

        

  if (DMA_GetITStatus(DMA2_Stream3,DMA_FLAG_TCIF3)==SET)

  {

             DMA_ClearITPendingBit(DMA2_Stream3,DMA_FLAG_TCIF3|DMA_FLAG_TEIF3);

          rt_kprintf(" spi tx done!\r\n");

    

      DMA_Cmd(DMA2_Stream3, DISABLE);

        

  }

}