读取DMA使能状态时,进入死循环,说明DMA没有使能,但是我觉得代码没有问题呀?为何会这样呢?
求大神指导。
另外,DMA_Stream和外设的对应关系在哪里找呀?我看手册上只有和Channel的对应关系呀?
void DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,ENABLE);
DMA_DeInit(DMA1_Stream1);
while (DMA_GetCmdStatus(DMA1_Stream1) != DISABLE)
{
}
DMA_InitStructure.DMA_Channel = DMA_Channel_4;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)aSRC_Const_Buffer;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)aDST_Buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToMemory;
DMA_InitStructure.DMA_BufferSize = 32;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
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_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA1_Stream1, &DMA_InitStructure);
DMA_Cmd(DMA1_Stream1, ENABLE);
while (DMA_GetCmdStatus(DMA1_Stream1) != ENABLE)
{
}
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