lee_hwa 发表于 2013-12-19 17:29 
DMA_InitStructure.DMA_Mode =DMA_Mode_Normal; 你用的是这个么?
是的
- DMA_Struc.DMA_Channel = DMA_Channel_3; //Channel3 of DMA2
- DMA_Struc.DMA_PeripheralBaseAddr = (uint32)(&(SPI1->DR)); //SPI1 data register(SPI1_BASE+0x0C)
- DMA_Struc.DMA_Memory0BaseAddr = (uint32)(ADC_RX_Buffer); //Memory address
- DMA_Struc.DMA_DIR = DMA_DIR_PeripheralToMemory;
- DMA_Struc.DMA_BufferSize = (uint32)(ADC_RX_SIZE); //Memory buffer size
- DMA_Struc.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
- DMA_Struc.DMA_MemoryInc = DMA_MemoryInc_Enable;
- DMA_Struc.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
- DMA_Struc.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
- DMA_Struc.DMA_Mode = DMA_Mode_Normal;
- DMA_Struc.DMA_Priority = DMA_Priority_High; //Priority_High
- DMA_Struc.DMA_FIFOMode = DMA_FIFOMode_Disable; //Disable FIFO mode
- DMA_Struc.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
- DMA_Struc.DMA_MemoryBurst = DMA_MemoryBurst_Single;
- DMA_Struc.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
- DMA_Init(DMA2_Stream0, &DMA_Struc);
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