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ADC ​

单通道 ​

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单通道使用DMA ​

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温度传感器 ​

在使用的时候在init函数里面会帮我们进行上电处理

c
  /* If ADC1 Channel_16 or Channel_17 is selected, enable Temperature sensor  */
  /* and VREFINT measurement path.                                            */
  if ((sConfig->Channel == ADC_CHANNEL_TEMPSENSOR) ||
      (sConfig->Channel == ADC_CHANNEL_VREFINT)      )
  {
    /* For STM32F1 devices with several ADC: Only ADC1 can access internal    */
    /* measurement channels (VrefInt/TempSensor). If these channels are       */
    /* intended to be set on other ADC instances, an error is reported.       */
    if (hadc->Instance == ADC1)
    {
        //在这里设置使能位
      if (READ_BIT(hadc->Instance->CR2, ADC_CR2_TSVREFE) == RESET)
      {
        SET_BIT(hadc->Instance->CR2, ADC_CR2_TSVREFE);
        
        if ((sConfig->Channel == ADC_CHANNEL_TEMPSENSOR))
        {
          /* Delay for temperature sensor stabilization time */
          /* Compute number of CPU cycles to wait for */
          wait_loop_index = (ADC_TEMPSENSOR_DELAY_US * (SystemCoreClock / 1000000U));
          while(wait_loop_index != 0U)
          {
            wait_loop_index--;
          }
        }
      }
    }
    else
    {
      /* Update ADC state machine to error */
      SET_BIT(hadc->State, HAL_ADC_STATE_ERROR_CONFIG);
      
      tmp_hal_status = HAL_ERROR;
    }
  }