为什么stm32f407的DMA-DAC配置不成功？

F_初心 · 发表于 2018-8-3 13:53:25

大神帮看看，程序如下：
void DAC_Ch1_Config(void)
{
DAC_InitTypeDef DAC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);
DAC_DeInit();
/* DAC channel1 Configuration */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;//是否使用触发功能
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;//是否使用波形发生
DAC_InitStructure.DAC_LFSRUnmask_TriangleAmplitude = DAC_LFSRUnmask_Bit0;//设置屏蔽/幅值选择器，这个变量只在使用波形发生器的时候才有用，这里我们设置为 0 即可，值为 DAC_LFSRUnmask_Bit0。
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;//设置输出缓存控制位
DAC_Init(DAC_Channel_1, &DAC_InitStructure);

   /* Enable DAC Channel1 */
DAC_Cmd(DAC_Channel_1, ENABLE);

// DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE);
}

void DAC_DMA1_Stream5_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

   /* DMA1_Stream5 channel7 configuration **************************************/
DMA_DeInit(DMA1_Stream5);
while (DMA_GetCmdStatus(DMA1_Stream5) != DISABLE);

DMA_InitStructure.DMA_Channel = DMA_Channel_7;
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&DAC->DHR12R1;
DMA_InitStructure.DMA_Memory0BaseAddr = (u32)(ADC_ConvertorValue);
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
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_Stream5, &DMA_InitStructure);

  /* Enable DMA1_Stream5 */
DMA_Cmd(DMA1_Stream5, ENABLE);
DAC_Cmd(DAC_Channel_1, ENABLE);

  /* Enable DMA for DAC Channel1 */
DAC_DMACmd(DAC_Channel_1, ENABLE);
// DAC_SoftwareTriggerCmd(DAC_Channel_1, ENABLE);
}