STM32F4-Discovery_FW_V1.1.0固件库中的Peripheral_Examples例子中中的“DAC_SignalsGeneration”工程，举例
/**
  * @brief  DAC Channel1 Escalator Configuration
  * @param  None
  * @retval None
  */
void DAC_Ch1_EscalatorConfig(void)
{
  DMA_InitTypeDef DMA_InitStructure;

  /* DAC channel1 Configuration */
  DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
  DAC_Init(DAC_Channel_1, &DAC_InitStructure);

  /* DMA1_Stream6 channel7 configuration **************************************/  
  DMA_DeInit(DMA1_Stream6);
  DMA_InitStructure.DMA_Channel = DMA_Channel_7;  
  DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR8R1_ADDRESS;
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&Escalator8bit;
  DMA_InitStructure.DMA_BufferSize = 6;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  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_HalfFull;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_Init(DMA1_Stream6, &DMA_InitStructure);   
  /* Enable DMA1_Stream6 */
  DMA_Cmd(DMA1_Stream6, ENABLE);

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

  /* Enable DMA for DAC Channel1 */
  DAC_DMACmd(DAC_Channel_1, ENABLE);
}
       其中DAC_Channel_1跟DMA1_Stream6的DMA_Channel_7对，明显不对。 。
不知道是出于什么原因。
       而函数void DAC_Ch2_SineWaveConfig(void)却是DAC_Channel_2跟DMA1_Stream5的DMA_Channel_7对。。。。有解释吗？？

自己顶！！

本来就不爱库

asssdz-382474 发表于 2016-10-30 12:46

我亲自测试过该工程，只开DAC1或是只开DAC2时，是没有输出的！！

stary666 发表于 2016-10-30 12:48
本来就不爱库

有很多地方不严够谨！

CUBE 的DAC与ADC配置DMA是问题最多的

关注。。。。。

呵呵哈哈哈或