使用STM32F070进行ADC多通道数据采集，DMA的方式，配置如下，但出现DMA数据错位情况void ADCInit(void)
{

ADC_InitTypeDef     ADC_InitStructure;
  DMA_InitTypeDef     DMA_InitStructure;

  /* ADC1 DeInit */  
  ADC_DeInit(ADC1);

  /* ADC1 Periph clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

  /* DMA1 clock enable */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);

  /* DMA1 Channel1 Config */
  DMA_DeInit(DMA1_Channel1);
  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)AD_Value;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
  DMA_InitStructure.DMA_BufferSize = 4*2;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStructure);

  /* DMA1 Channel1 enable */
  DMA_Cmd(DMA1_Channel1, ENABLE);

  /* ADC DMA request in circular mode */
  ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);

  /* Enable ADC_DMA */
  ADC_DMACmd(ADC1, ENABLE);  

  /* Initialize ADC structure */
  ADC_StructInit(&ADC_InitStructure);

  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits  */
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;
  ADC_Init(ADC1, &ADC_InitStructure);

  /* Convert the ADC1 temperature sensor  with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_11 , ADC_SampleTime_55_5Cycles);  

  /* Convert the ADC1 Vref  with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_13 , ADC_SampleTime_55_5Cycles);

  /* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);

  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);     

  /* Wait the ADCEN falg */
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));

  /* ADC1 regular Software Start Conv */
  ADC_StartOfConversion(ADC1);


}

程序GPIO部分在初始化ADC之前已经初始化了
使用DMA进行数据传送，目标地址为AD_Value[4][2];本意是每通道采集4此后求平均的
理论上AD_Value[0][0],AD_Value[1][0],AD_Value[2][0],AD_Value[3][0],应该是通道11的数据；
AD_Value[0][1],AD_Value[1][1],AD_Value[2][1],AD_Value[3][1],应该是通道13的数据，但是实际上数据对调了
求大神指点，谢谢！

ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;
把上面这句的参数改为ADC_ScanDirection_Upward

用这个配置采集的顺序ADC_RegularChannelConfig(ADC1,ADC_Channel_11,1,ADC_SampleTime_55Cycles5);   ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 2, ADC_SampleTime_55Cycles5);

詹科联手走天下吗 发表于 2017-12-7 08:39
用这个配置采集的顺序ADC_RegularChannelConfig(ADC1,ADC_Channel_11,1,ADC_SampleTime_55Cycles5);   ADC_ ...

谢谢回复，在STM32F0XX系列中是没有这样指定顺序的函数的

应该先初始化DMA后才初始化ADC。