出邪了，采用SPI的DMA就收不到数呢

只看该作者 · 2012-6-18 10:24

void SPI_Configuration(void)
{
SPI_InitTypeDef  SPI_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  DMA_InitTypeDef DMA_InitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2,ENABLE);
  /* PB15-MOSI2,PB13-SCK2*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_14| GPIO_Pin_15;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOB,&GPIO_InitStructure);
  /* SPI2 configuration */
  SPI_Cmd(SPI2, DISABLE);          //必须先禁能,才能改变MODE
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;  //两线全双工
  SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;    //主
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;    //16位
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;       //CPOL=1
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;    //CPHA=1
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;       //软件NSS
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;  //2分频
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;    //高位在前
  SPI_InitStructure.SPI_CRCPolynomial = 7;       //CRC7
  SPI_Init(SPI2, &SPI_InitStructure);
SPI_Cmd(SPI2, ENABLE);
SPI_I2S_DMACmd(SPI2,SPI_I2S_DMAReq_Rx,ENABLE);
// SPI_CalculateCRC(SPI2, ENABLE);
// SPI_I2S_ITConfig(SPI2,SPI_I2S_IT_RXNE,ENABLE);
// NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
/*UART2*/
// NVIC_InitStructure.NVIC_IRQChannel = SPI2_IRQn;
// NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
// NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
// NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
// NVIC_Init(&NVIC_InitStructure);
#if 1
  /*DMA的配置 */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* DMA通道1*/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr =(u32)(&(SPI2->DR));  //ADC1数据寄存器
DMA_InitStructure.DMA_MemoryBaseAddr =(u32)(DmaBuf); //获取ADC的数组要存放的位置
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;    //片内外设作源头
DMA_InitStructure.DMA_BufferSize = DMA_DEBUGINITSIZE; //  DMA_SENSORBUFSIZE;       //每次DMA16个数据
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;  //外设地址不增加
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址增加
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte; //半字
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte; //半字
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;       //普通模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High;    //高优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;       //非内存到内存
DMA_Init(DMA1_Channel1, &DMA_InitStructure);

DMA_ITConfig(DMA1_Channel1, DMA_IT_TC|DMA_IT_TE, ENABLE);       //DMA通道1传输完成中断

/* Enable DMA1 channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  /* Enable DMA channel6 IRQ Channel */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
#endif
}
就是进不了中断，为什么呢，高手解答下吧