采用stm32f103ve的SPI1，用DMA方式发送数据，不能进入中断函数

只看该作者 · 2014-3-17 16:51

配置SPI1工作在DMA模式下，采用循环模式，数据可以正常的经由DMA发送，传输完成后，中断寄存器的传输完成中断标志位被置位，但是不能进入中断函数，请教各位，是什么原因？

void SpiCC3000Init(void)
{
   SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef  GPIO_InitStructure;
  /*!< Disable SPI */
  SPI_Cmd(SPI_USED, DISABLE);

  /*!< DeInitializes the SPI */
  SPI_I2S_DeInit(SPI_USED);

  /*!< SPI Periph clock disable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2 , DISABLE);
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 , DISABLE);
/*Enable SPI2 Clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
  RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOB, ENABLE);
/*Enable SPI1 Clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 |RCC_APB2Periph_GPIOA,ENABLE);
/*Config  clk and mosi */
GPIO_InitStructure.GPIO_Pin = SPI_CLK_PIN| SPI_MOSI_PIN;//
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//AF_PP
GPIO_Init(SPI_PORT, &GPIO_InitStructure);

   /*!< Configure SPI pins: MISO */
      GPIO_InitStructure.GPIO_Pin = SPI_MISO_PIN;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
      GPIO_Init(SPI_PORT, &GPIO_InitStructure);
/*!< Configure SPI pins: CS output high */
GPIO_InitStructure.GPIO_Pin = SPI_CS_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(SPI_PORT, &GPIO_InitStructure);

  /*!< CC3000 SPI Init */
  SPI_StructInit(&SPI_InitStructure);
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;

  /* The buadrate is a fraction of the 32MHz clock*/
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;//32
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
  SPI_Init(SPI_USED, &SPI_InitStructure);
  /*!< Enable SPI interrupt */
  SPI_I2S_ClearITPendingBit(SPI_USED, SPI_I2S_IT_TXE);
  SPI_I2S_ITConfig(SPI_USED, SPI_I2S_IT_TXE, ENABLE);
  /*!< SPI Init */
  SPI_SSOutputCmd(SPI_USED,ENABLE);
  SPI_Cmd(SPI_USED, ENABLE);

  /*Configure SPI for DMA Operation*/
#if defined(ENABLE_SPI_DMA)
  SpiCC3000DMAInit();
#else
  //SpiRxInterruptClkInit();
#endif
}
void SpiCC3000DMAInit(void)
{

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

  DMA_DeInit(SPI_DMA_RX_CHANNEL);
  DMA_DeInit(SPI_DMA_TX_CHANNEL);

  /* Configure and enable SPI DMA TX Channel interrupt */
  //NVIC_RxInt_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn; //SPI2 TX
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_RxInt_InitStructure.NVIC_IRQChannel = DMA1_Channel3_IRQn;//SPI1 TX // not config the Rx channel
  NVIC_RxInt_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_RxInt_InitStructure.NVIC_IRQChannelSubPriority = 0;//0
  NVIC_RxInt_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_RxInt_InitStructure);
//yichuan

  DMA_ITConfig(SPI_DMA_TX_CHANNEL, DMA1_IT_TC3, ENABLE);
// DMA_ITConfig(SPI_DMA_RX_CHANNEL, DMA_IT_TC, ENABLE);

  /* Enable the DMA Channels Interrupts */
// DMA_ITConfig(SPI_DMA_TX_CHANNEL, DMA_IT_TC, ENABLE);
// DMA_ITConfig(SPI_DMA_RX_CHANNEL, DMA_IT_TC, ENABLE);
  /* Configure DMA Peripheral but don't send data*/
  C3000_DMA_Config(SPI_DMA_RX, (uint8_t*)wlan_rx_buffer,0);
//C3000_DMA_Config(SPI_DMA_TX, (uint8_t*)wlan_tx_buffer,0);
  C3000_DMA_Config(SPI_DMA_TX, (uint8_t*)wlan_tx_buffer,1700);  //buffer is 1700

/* Enable SPI DMA request */
  SPI_I2S_DMACmd(SPI_USED,SPI_I2S_DMAReq_Tx, ENABLE);
  SPI_I2S_DMACmd(SPI_USED,SPI_I2S_DMAReq_Rx, ENABLE);
/* Enable DMA RX Channel */
  DMA_Cmd(SPI_DMA_RX_CHANNEL, ENABLE);
/* Enable DMA TX Channel */
  DMA_Cmd(SPI_DMA_TX_CHANNEL, ENABLE);
}

static void C3000_DMA_Config(SPI_DMADirection_TypeDef Direction, uint8_t* buffer, uint16_t NumData)
{

#if defined(ENABLE_SPI_DMA)
  DMA_InitTypeDef DMA_InitStructure;
  /* Initialize the DMA_PeripheralBaseAddr member */
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t )&SPI1->DR; //SPI_DR_BASE; //
  /* Initialize the DMA_MemoryBaseAddr member */
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)buffer;
/* Initialize the DMA_PeripheralInc member */
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  /* Initialize the DMA_MemoryInc member */
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  /* Initialize the DMA_PeripheralDataSize member */
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  /* Initialize the DMA_MemoryDataSize member */
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  /* Initialize the DMA_Mode member */
//yichuan
  //DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  /* Initialize the DMA_Priority member */
  DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
  /* Initialize the DMA_M2M member */
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  /* If using DMA for Reception */
  if (Direction == SPI_DMA_RX)
  {
/* Initialize the DMA_DIR member */
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

/* Initialize the DMA_BufferSize member */
DMA_InitStructure.DMA_BufferSize = NumData;

DMA_DeInit(SPI_DMA_RX_CHANNEL);

DMA_Init(SPI_DMA_RX_CHANNEL, &DMA_InitStructure);
  }
/* If using DMA for Transmission */
  else if (Direction == SPI_DMA_TX)
  {
/* Initialize the DMA_DIR member */
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;

/* Initialize the DMA_BufferSize member */
DMA_InitStructure.DMA_BufferSize = NumData;

DMA_DeInit(SPI_DMA_TX_CHANNEL);

DMA_Init(SPI_DMA_TX_CHANNEL, &DMA_InitStructure);
  }
#endif
}

void DMA1_Channel3_IRQHandler(void)
{
if(DMA_GetITStatus(DMA1_IT_TC3)==SET)
{
      GPIO_InitTypeDef GPIO_InitStructure;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
   GPIO_Init(GPIOC, &GPIO_InitStructure);
      GPIO_ResetBits(GPIOC,GPIO_Pin_6);

}
DMA_ClearITPendingBit(DMA1_IT_TC3);

}