STM32F030 ADC DMA采集数据，实测，可用

huaxiang123

刚开始在DMA中断中没有写ADC_StopOfConversion(ADC1)，到时传输后的数据时错位的，加上这句话就不错位了


void adc_dma_init(void)
{

  ADC_InitTypeDef     ADC_InitStruct;
  DMA_InitTypeDef     DMA_InitStruct;
  GPIO_InitTypeDef    GPIO_InitStruct;
  NVIC_InitTypeDef    NVIC_InitStruct;

  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);

  DMA_DeInit(DMA1_Channel1);
  DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address;
  DMA_InitStruct.DMA_MemoryBaseAddr = (uint32_t)&ADC_Value;
  DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralSRC;    //DMA单向传输
  DMA_InitStruct.DMA_BufferSize = Channel_Num * Sample_Num;
  DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
//        DMA_InitStruct.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStruct.DMA_Priority = DMA_Priority_High;
  DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
  DMA_Init(DMA1_Channel1, &DMA_InitStruct);       
       
       
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB, ENABLE);
  /* Configure PA.01  as analog input */
  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
        GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStruct); // PA1,输入时不用设置速率

  GPIO_InitStruct.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AN;
        GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOB, &GPIO_InitStruct); // PA1,输入时不用设置速率


  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
  RCC_ADCCLKConfig(RCC_ADCCLK_PCLK_Div4);

  NVIC_InitStruct.NVIC_IRQChannel = DMA1_Channel1_IRQn;
  NVIC_InitStruct.NVIC_IRQChannelPriority = 0;
        NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStruct);


       

  /* ADC1 DeInit */  
  ADC_DeInit(ADC1);

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

  /* Configure the ADC1 in continous mode withe a resolutuion equal to 12 bits  */
  ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
  ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
  ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStruct.ADC_ScanDirection = ADC_ScanDirection_Upward;  //ADC的扫描方向
  ADC_Init(ADC1, &ADC_InitStruct);

  /* Convert the ADC1 Vref  with 55.5 Cycles as sampling time */
  ADC_ChannelConfig(ADC1, ADC_Channel_0, ADC_SampleTime_55_5Cycles);   
  ADC_ChannelConfig(ADC1, ADC_Channel_1, ADC_SampleTime_55_5Cycles);   
  ADC_ChannelConfig(ADC1, ADC_Channel_4, ADC_SampleTime_55_5Cycles);  
  ADC_ChannelConfig(ADC1, ADC_Channel_5, ADC_SampleTime_55_5Cycles);   
  ADC_ChannelConfig(ADC1, ADC_Channel_6, ADC_SampleTime_55_5Cycles);
  ADC_ChannelConfig(ADC1, ADC_Channel_7, ADC_SampleTime_55_5Cycles);
  ADC_ChannelConfig(ADC1, ADC_Channel_8, ADC_SampleTime_55_5Cycles);
  ADC_ChannelConfig(ADC1, ADC_Channel_9, ADC_SampleTime_55_5Cycles);  


/* ADC Calibration */
  ADC_GetCalibrationFactor(ADC1);
/* Enable ADC_DMA */
  ADC_DMACmd(ADC1, ENABLE); // ADC_DMACmd(ADC1, ENABLE);要放在ADC_ChannelConfig后面，否则ADC值会错一位

  ADC_Cmd(ADC1, ENABLE);
       
    /* ADC DMA request in circular mode */
  ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
  /* Wait the ADCEN falg */
//  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN));
  while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADRDY));    //waiting for ADC be ready

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

  DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE);
//        DMA_ClearITPendingBit(DMA_IT_TC);
  DMA_ClearFlag(DMA1_FLAG_TC1);       


  /* ADC1 regular Software Start Conv */
  ADC_StartOfConversion(ADC1);
//        ADC_Cmd(ADC1, DISABLE);   
}








void DMA1_Channel1_IRQHandler(void)
{

    if(DMA_GetITStatus(DMA1_IT_TC1))
    {
                          ADC_StopOfConversion(ADC1);
        DMA_Cmd(DMA1_Channel1, DISABLE);       
        adc_finish_flag = 1;               
        DMA_ClearFlag(DMA1_FLAG_TC1);
    }
}