xufengjuan 发表于 2011-9-15 20:10:04

207 DMA

 
大家帮忙看看我的DMA配置有没有问题，使能后TCIF位始终不置位
static void DMA_RxConfiguration(u32 *BufferDST, u32 BufferSize)
{
    DMA_InitTypeDef DMA_InitStructure; 
    DMA_ClearFlag(DMA2_Stream6,DMA_FLAG_TCIF6 );
    DMA_ClearFlag(DMA2_Stream6,DMA_FLAG_TEIF6 );
    DMA_ClearFlag(DMA2_Stream6,DMA_FLAG_HTIF6 );
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
  
    DMA_Cmd(DMA2_Stream6, DISABLE);
    DMA_InitStructure.DMA_Channel = DMA_Channel_4;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)SDIO_FIFO_Address;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_BufferSize = BufferSize / 4;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_Memory0BaseAddr = (u32)BufferDST;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
     /* Initialize the DMA_FIFOMode member */
    DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
  /* Initialize the DMA_FIFOThreshold member */
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull;
 
  
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
   
  
    DMA_InitStructure.DMA_BufferSize = BufferSize / 4;
   
    DMA_DeInit(DMA2_Stream6);
   
    DMA_Init(DMA2_Stream6, &DMA_InitStructure);
 
 
    DMA_Cmd(DMA2_Stream6, ENABLE);
 
}
 

安 发表于 2011-9-16 09:30:32

RE:207 DMA

CC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
这个开启了吗？

xufengjuan 发表于 2011-9-17 08:45:11

回复:207 DMA

回复第 2 楼 于2011-09-16 01:30:32发表:
CC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
这个开启了吗？ 

开了
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