stm32dmaadc

Read ADC using DMA in STM32


I want to read ADC1 and ADC2 on an STM32 using DMA. I use ADC callback as shown below:

void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{

}

How can I make a decision between ADC1 and ADC2? For example, I want to update Val_1 after ADC1 conversion is done and update Val_2 after ADC2 conversion is done.


Solution

  • The ADC_HandleTypeDef* hadc passed into your callback function has an Instance field you can check. e.g.

    void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
    {
        if (hadc->Instance == ADC1)
        {
            // ADC1 code
        }
        else if (hadc->Instance == ADC2)
        {
            // ADC2 code
        }
    }