stm32 读取多路SDADC

方法一：用SDADC的规则通道一个一个去读，配置SDADC如下

 读入代码比较简单，依次读取SDADC1通道6、通道8和SDADC3通道0，代码如下

/* USER CODE BEGIN Header_StartDefaultTask */
volatile uint32_t SDADC_Value[10];
/**
  * @brief  Function implementing the defaultTask thread.
  * @param  argument: Not used
  * @retval None
  */
/* USER CODE END Header_StartDefaultTask */
void StartDefaultTask(void const * argument)
{
  /* USER CODE BEGIN StartDefaultTask */
  /* Infinite loop */
  for(;;)
  {
      //read SDADC1 Channel6
    HAL_SDADC_ConfigChannel(&hsdadc1,SDADC_CHANNEL_6,SDADC_CONTINUOUS_CONV_OFF);// set channel
    HAL_SDADC_Start(&hsdadc1);//start sdadc
    if(HAL_SDADC_PollForConversion(&hsdadc1,HAL_MAX_DELAY)==HAL_OK)//waiting for convert complete
    {
        SDADC_Value[0] = HAL_SDADC_GetValue(&hsdadc1);// read the value of sdadc
        HAL_SDADC_Stop(&hsdadc1);
    }

      //read SDADC1 Channel8
    HAL_SDADC_ConfigChannel(&hsdadc1,SDADC_CHANNEL_8,SDADC_CONTINUOUS_CONV_OFF);
    HAL_SDADC_Start(&hsdadc1);
    if(HAL_SDADC_PollForConversion(&hsdadc1,HAL_MAX_DELAY)==HAL_OK)
    {
        SDADC_Value[1] = HAL_SDADC_GetValue(&hsdadc1);
        HAL_SDADC_Stop(&hsdadc1);
    }

      //read SDADC3 Channel0
    HAL_SDADC_ConfigChannel(&hsdadc3,SDADC_CHANNEL_0,SDADC_CONTINUOUS_CONV_OFF);
    HAL_SDADC_Start(&hsdadc3);
    if(HAL_SDADC_PollForConversion(&hsdadc3,HAL_MAX_DELAY)==HAL_OK)
    {
        SDADC_Value[2] = HAL_SDADC_GetValue(&hsdadc3);
        HAL_SDADC_Stop(&hsdadc3);
    }
    osDelay(1);
  }
  /* USER CODE END StartDefaultTask */
}

方法二：用注入通道一次读取多个转换值

配置SDADC

 配置DMA

 在stm32f3xx_it.c文件中修改

/**
  * @brief This function handles DMA2 channel3 global interrupt.
  */
void DMA2_Channel3_IRQHandler(void)
{
  /* USER CODE BEGIN DMA2_Channel3_IRQn 0 */

  /* USER CODE END DMA2_Channel3_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_sdadc1);
  /* USER CODE BEGIN DMA2_Channel3_IRQn 1 */
  IsFinishDMA2_Channel3 = 1;//DMA 转换完毕
  /* USER CODE END DMA2_Channel3_IRQn 1 */
}

/**
  * @brief This function handles DMA2 channel5 global interrupt.
  */
void DMA2_Channel5_IRQHandler(void)
{
  /* USER CODE BEGIN DMA2_Channel5_IRQn 0 */

  /* USER CODE END DMA2_Channel5_IRQn 0 */
  HAL_DMA_IRQHandler(&hdma_sdadc3);
  /* USER CODE BEGIN DMA2_Channel5_IRQn 1 */
  IsFinishDMA2_Channel5 = 1;//DMA 转换完毕
  /* USER CODE END DMA2_Channel5_IRQn 1 */
}

/* USER CODE BEGIN Header_StartDefaultTask */
static uint32_t     SDADC1_DegitalValue[5];
static uint32_t     SDADC3_DegitalValue[5];
/**
  * @brief  Function implementing the defaultTask thread.
  * @param  argument: Not used
  * @retval None
  */
/* USER CODE END Header_StartDefaultTask */
void StartDefaultTask(void const * argument)
{
  /* USER CODE BEGIN StartDefaultTask */
  /* Infinite loop */
  for(;;)
  {
    if(HAL_SDADC_InjectedStart_DMA(&hsdadc3,SDADC3_DegitalValue,5) == HAL_OK)
    {
        while(IsFinishDMA2_Channel5 == 0)
            osDelay(1);//等待DMA转换完成
        IsFinishDMA2_Channel5 = 0;
        HAL_SDADC_InjectedStop_DMA(&hsdadc3);
    }

    if(HAL_SDADC_InjectedStart_DMA(&hsdadc1,SDADC1_DegitalValue,5) == HAL_OK)
    {
        while(IsFinishDMA2_Channel3 == 0)
            osDelay(1);//等待DMA转换完成
        IsFinishDMA2_Channel3 = 0;
        HAL_SDADC_InjectedStop_DMA(&hsdadc1);
    }
    osDelay(1);
  }
  /* USER CODE END StartDefaultTask */
}

转换结果如下：

源码下载地址：https://github.com/lizhiqiang0204/STM32_SDADC　本例程是用STM32CubeIDE软件编写的