STM32 SPI2使用DMA接收，DMA接收完成后不进DMA中断？？？

Question

    //Configuration SPI2 of CCPU2MCU
    RCC_AHB1PeriphClockCmd(PROTOCOL_SPI_PORT_CLK,ENABLE);       //使能GPIO B口的时钟
  RCC_APB1PeriphClockCmd(PROTOCOL_SPI_CLK, ENABLE);         //使能SPI2 时钟

  GPIO_PinAFConfig(PROTOCOL_SPI_CS_PORT, PROTOCOL_SPI_CS_PIN_SRC, GPIO_AF_SPI2);
  GPIO_PinAFConfig(PROTOCOL_SPI_SCK_PORT, PROTOCOL_SPI_SCK_PIN_SRC, GPIO_AF_SPI2);
  GPIO_PinAFConfig(PROTOCOL_SPI_MISO_PORT, PROTOCOL_SPI_MISO_PIN_SRC, GPIO_AF_SPI2);
  GPIO_PinAFConfig(PROTOCOL_SPI_MOSI_PORT, PROTOCOL_SPI_MOSI_PIN_SRC, GPIO_AF_SPI2);

  GPIO_InitStructure.GPIO_Pin = PROTOCOL_SPI_CS_PIN;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
  GPIO_Init(PROTOCOL_SPI_CS_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = PROTOCOL_SPI_SCK_PIN;
  GPIO_Init(PROTOCOL_SPI_SCK_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin = PROTOCOL_SPI_MOSI_PIN;
  GPIO_Init(PROTOCOL_SPI_MOSI_PORT, &GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;     
  GPIO_InitStructure.GPIO_Pin = PROTOCOL_SPI_MISO_PIN;
  GPIO_Init(PROTOCOL_SPI_MISO_PORT, &GPIO_InitStructure);


  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_Low;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Hard;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4; 
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 0x07;
  SPI_Init(SPI2, &SPI_InitStructure);

  SPI_Cmd(SPI2, ENABLE);

    // Configuration DMA1
 DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef  NVIC_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);    
DMA_DeInit(DMA1_Stream3);  //SPI2 Rx

DMA_InitStructure.DMA_Channel  = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&(SPI2->DR));               
DMA_InitStructure.DMA_Memory0BaseAddr = (u32)(&USART_RX_DMA_Buf[0]);     
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;                      
DMA_InitStructure.DMA_BufferSize = 16384+6;  //32768+6;                                                            
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;   
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;                 
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

    DMA_Init(DMA1_Stream3, &DMA_InitStructure);     
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE);    

    DMA_ClearITPendingBit(DMA1_Stream3,DMA_IT_TCIF3);
DMA_ITConfig(DMA1_Stream3,DMA_IT_TC,ENABLE);
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Stream3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannel = ENABLE;
NVIC_Init(&NVIC_InitStructure);

DMA_Cmd(DMA1_Stream3, ENABLE);

// DMA Interrupt

void DMA1_Stream3_IRQHandler(void)
{
unsigned int len;
len = 0;

if(DMA_GetITStatus(DMA1_Stream3, DMA_IT_TCIF3) != RESET)
{
      DMA_ClearITPendingBit(DMA1_Stream3,DMA_IT_TCIF3);

      DMA_Cmd(DMA1_Stream3,DISABLE);
              spiRxFlag = 1;

      DMA_SetCurrDataCounter(DMA1_Stream3, 16384+6);            
      DMA_Cmd(DMA1_Stream3, ENABLE);

}   

}