无法进入SPI2 接收中断

只看该作者 · 2016-4-6 21:19

SPI2作为从机接收数据，但是无论如何也进不了它的中断。请高手指教，谢谢！
程序如下

void SPI_COMMS_GPIO_init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_14;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin =GPIO_Pin_13|GPIO_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);

}

void SPI_COMMS_SPI_init(void)
{

SPI_InitTypeDef SPI_InitStructure;
SPI_InitStructure.SPI_Mode=SPI_Mode_Slave;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;    //0
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_128;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 0;
SPI_Init(SPI2,&SPI_InitStructure);
SPI_I2S_ITConfig(SPI2, SPI_I2S_IT_RXNE, ENABLE);

}

void SPI_COMMS_init(void)
{
SPI_COMMS_GPIO_init();
SPI_COMMS_SPI_init();
SPI_COMMS_NVIC_Configuration();
SPI_Cmd(SPI2,ENABLE);

}

void SPI_COMMS_SEND(unsigned char theFunc, unsigned char no)
{

}

void SPI_COMMS_NVIC_Configuration(void)
{

  //EXTI_InitTypeDef EXTI_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  /* Configure one bit for preemption priority */
  #if defined (VECT_TAB_RAM)
  /* Set the Vector Table base location at 0x20000000 */
  NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#elif defined(VECT_TAB_FLASH_IAP)
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x2000);
#else  /* VECT_TAB_FLASH  */
  /* Set the Vector Table base location at 0x08000000 */
  NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif

  /* Configure the NVIC Preemption Priority Bits */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);


  NVIC_InitStructure.NVIC_IRQChannel =  SPI2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

void SPI2_IRQHandler(void)
{
  SPI_I2S_ClearITPendingBit(SPI2, SPI_I2S_IT_RXNE);
SPI_I2S_SendData(SPI2, 0x23);
}