在STM32F4上面SPI2 DMA 接受不到数据
大家好，我最近遇到一个问题，SPI2 DMA 接受不到数据，不知道哪里遇到了问题，向大神们请教一下。比较急，谢谢！下面是我的代码：
DCMI 通过DMA给 SPI发数据，DCMI有数据发出，且数据正确。但是SPI没有接受到数据，且LCD没有显示摄像头端的数据（spi2驱动LCD是ok的）。
DCMI端代码：这是ok的通过FSMC验证过。
DMA_InitTypeDefDMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
//spi tx -> DMA_Channel_3
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);
DMA_DeInit(DMA2_Stream1);//µÈ´ýDMA2_Stream1
while (DMA_GetCmdStatus(DMA2_Stream1) != DISABLE){}
DMA_InitStructure.DMA_Channel = DMA_Channel_1;//ͨµÀ1 DCMIͨµÀ
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&DCMI->DR;
DMA_InitStructure.DMA_Memory0BaseAddr = (u32)&SPI2->DR;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = DMA_BufferSize;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA2_Stream1, &DMA_InitStructure);
SPI DMA端配置代码：
void SPI2_DMAInit (void)
{
DMA_InitTypeDef DMA_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
DMA_DeInit(DMA1_Stream3);
DMA_DeInit(DMA1_Stream4);
while (DMA_GetCmdStatus(DMA1_Stream3) != DISABLE){printf("-");}
DMA_InitStructure.DMA_Channel= DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&(SPI2->DR));
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SPI_RXBUFFER;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream3, &DMA_InitStructure);
// DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SPI_TXBUFFER; //
// DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
// DMA_InitStructure.DMA_BufferSize = 8; //
// DMA_InitStructure.DMA_Priority = DMA_Priority_Low;
// DMA_Init(DMA1_Stream4, &DMA_InitStructure);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx, ENABLE);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, ENABLE);
DMA_ITConfig(DMA1_Stream3, DMA_IT_TC | DMA_IT_TE, ENABLE);
DMA_ITConfig(DMA1_Stream4, DMA_IT_TC | DMA_IT_TE, ENABLE);
NVIC_InitTypeDefNVIC_InitStructure;
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_Cmd(DMA1_Stream4, ENABLE);
printf("DMA 000 \n");
}
void DMA1_Stream3_IRQHandler (void)
{
if (DMA_GetITStatus(DMA1_Stream3, DMA_IT_TCIF3) == SET)
{
DMA_ClearFlag(DMA1_Stream3, DMA_IT_TC);
DMA_ClearFlag(DMA1_Stream4, DMA_IT_TC);
DMA_ClearITPendingBit(DMA1_Stream3, DMA_IT_TCIF3);
DMA_ClearITPendingBit(DMA1_Stream4, DMA_IT_TCIF4);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Tx, DISABLE);
SPI_I2S_DMACmd(SPI2, SPI_I2S_DMAReq_Rx, DISABLE);
printf("DMA 111 \n");
}
printf("DMA 222 \n");
}
第一次使用SPI DMA有点菜，希望高手能够指点指点。 DMA_InitStructure.DMA_Memory0BaseAddr = (u32)&SPI2->DR;
这一句有问题啊，RAM地址怎么写成SPI寄存器了？
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