STM32双ADC交错采集代码

以下是基于HAL库的STM32双ADC交错采集代码，适用于STM32F4系列。

首先需要初始化ADC1和ADC2：

ADC_HandleTypeDef hadc1;
ADC_HandleTypeDef hadc2;

void MX_ADC1_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;

  /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) 
  */
  hadc1.Instance = ADC1;
  hadc1.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
  hadc1.Init.Resolution = ADC_RESOLUTION_12B;
  hadc1.Init.ScanConvMode = DISABLE;
  hadc1.Init.ContinuousConvMode = ENABLE;
  hadc1.Init.DiscontinuousConvMode = DISABLE;
  hadc1.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc1.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc1.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc1.Init.NbrOfConversion = 1;
  hadc1.Init.DMAContinuousRequests = DISABLE;
  hadc1.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  if (HAL_ADC_Init(&hadc1) != HAL_OK)
  {
    Error_Handler();
  }

  /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. 
  */
  sConfig.Channel = ADC_CHANNEL_0;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc1, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

}

void MX_ADC2_Init(void)
{
  ADC_ChannelConfTypeDef sConfig;

  /**Configure the global features of the ADC (Clock, Resolution, Data Alignment and number of conversion) 
  */
  hadc2.Instance = ADC2;
  hadc2.Init.ClockPrescaler = ADC_CLOCK_SYNC_PCLK_DIV2;
  hadc2.Init.Resolution = ADC_RESOLUTION_12B;
  hadc2.Init.ScanConvMode = DISABLE;
  hadc2.Init.ContinuousConvMode = ENABLE;
  hadc2.Init.DiscontinuousConvMode = DISABLE;
  hadc2.Init.ExternalTrigConvEdge = ADC_EXTERNALTRIGCONVEDGE_NONE;
  hadc2.Init.ExternalTrigConv = ADC_SOFTWARE_START;
  hadc2.Init.DataAlign = ADC_DATAALIGN_RIGHT;
  hadc2.Init.NbrOfConversion = 1;
  hadc2.Init.DMAContinuousRequests = DISABLE;
  hadc2.Init.EOCSelection = ADC_EOC_SINGLE_CONV;
  if (HAL_ADC_Init(&hadc2) != HAL_OK)
  {
    Error_Handler();
  }

  /**Configure for the selected ADC regular channel its corresponding rank in the sequencer and its sample time. 
  */
  sConfig.Channel = ADC_CHANNEL_1;
  sConfig.Rank = 1;
  sConfig.SamplingTime = ADC_SAMPLETIME_3CYCLES;
  if (HAL_ADC_ConfigChannel(&hadc2, &sConfig) != HAL_OK)
  {
    Error_Handler();
  }

}

接下来需要配置ADC1和ADC2的DMA：

DMA_HandleTypeDef hdma_adc1;
DMA_HandleTypeDef hdma_adc2;

void MX_DMA_Init(void) 
{
  /* DMA controller clock enable */
  __HAL_RCC_DMA2_CLK_ENABLE();

  /* DMA interrupt init */
  /* DMA2_Stream0_IRQn interrupt configuration */
  HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 0, 0);
  HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);

}

void HAL_ADC_MspInit(ADC_HandleTypeDef* adcHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(adcHandle->Instance==ADC1)
  {
    /* ADC1 clock enable */
    __HAL_RCC_ADC1_CLK_ENABLE();
  
    /**ADC1 GPIO Configuration    
    PC0     ------> ADC1_IN10 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_0;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    /* ADC1 DMA Init */
    /* ADC1 Init */
    hdma_adc1.Instance = DMA2_Stream0;
    hdma_adc1.Init.Channel = DMA_CHANNEL_0;
    hdma_adc1.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_adc1.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_adc1.Init.MemInc = DMA_MINC_ENABLE;
    hdma_adc1.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
    hdma_adc1.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_adc1.Init.Mode = DMA_CIRCULAR;
    hdma_adc1.Init.Priority = DMA_PRIORITY_LOW;
    hdma_adc1.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_adc1) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc1);

  }
  else if(adcHandle->Instance==ADC2)
  {
    /* ADC2 clock enable */
    __HAL_RCC_ADC2_CLK_ENABLE();
  
    /**ADC2 GPIO Configuration    
    PC1     ------> ADC2_IN11 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_1;
    GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

    /* ADC2 DMA Init */
    /* ADC2 Init */
    hdma_adc2.Instance = DMA2_Stream3;
    hdma_adc2.Init.Channel = DMA_CHANNEL_1;
    hdma_adc2.Init.Direction = DMA_PERIPH_TO_MEMORY;
    hdma_adc2.Init.PeriphInc = DMA_PINC_DISABLE;
    hdma_adc2.Init.MemInc = DMA_MINC_ENABLE;
    hdma_adc2.Init.PeriphDataAlignment = DMA_PDATAALIGN_HALFWORD;
    hdma_adc2.Init.MemDataAlignment = DMA_MDATAALIGN_HALFWORD;
    hdma_adc2.Init.Mode = DMA_CIRCULAR;
    hdma_adc2.Init.Priority = DMA_PRIORITY_LOW;
    hdma_adc2.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
    if (HAL_DMA_Init(&hdma_adc2) != HAL_OK)
    {
      Error_Handler();
    }

    __HAL_LINKDMA(adcHandle,DMA_Handle,hdma_adc2);

  }
}

void HAL_ADC_MspDeInit(ADC_HandleTypeDef* adcHandle)
{

  if(adcHandle->Instance==ADC1)
  {
    /* Peripheral clock disable */
    __HAL_RCC_ADC1_CLK_DISABLE();
  
    /**ADC1 GPIO Configuration    
    PC0     ------> ADC1_IN10 
    */
    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_0);

    /* ADC1 DMA DeInit */
    HAL_DMA_DeInit(adcHandle->DMA_Handle);

  }
  else if(adcHandle->Instance==ADC2)
  {
    /* Peripheral clock disable */
    __HAL_RCC_ADC2_CLK_DISABLE();
  
    /**ADC2 GPIO Configuration    
    PC1     ------> ADC2_IN11 
    */
    HAL_GPIO_DeInit(GPIOC, GPIO_PIN_1);

    /* ADC2 DMA DeInit */
    HAL_DMA_DeInit(adcHandle->DMA_Handle);

  }
} 

最后是ADC的采集函数：

uint16_t ADC_ConvertedValue[2];
void ADC_Start(void)
{
    HAL_ADC_Start_DMA(&hadc1, (uint32_t*)&ADC_ConvertedValue[0], 1);
    HAL_ADC_Start_DMA(&hadc2, (uint32_t*)&ADC_ConvertedValue[1], 1);
}

在主程序中调用ADC_Start()即可开始采集。采集到的数据存储在ADC_ConvertedValue数组中，第一个元素为ADC1采集到的数据，第二个元素为ADC2采集到的数据。