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mccabehm
Visitor II
September 30, 2025
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STM32H563 ADC Discontinuous Mode

  • September 30, 2025
  • 1 reply
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Exploring ADC discontinuous mode with interrupts. Any issues calling HAL_ADC_Start_IT() from ADC ISR? Looks like a lot of code to run from an ISR.

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    Best answer by Saket_Om

    Hello @mccabehm 

    The recommended approach is to avoid calling HAL_ADC_Start_IT() from within the ADC interrupt service routine (ISR) or its callback function. Instead, you should set a flag inside the ISR or callback to indicate that the ADC conversion has completed. Then, in your main loop check this flag and call HAL_ADC_Start_IT() to start the next conversion.

    1 reply

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    Saket_OmAnswer
    Technical Moderator
    October 1, 2025

    Hello @mccabehm 

    The recommended approach is to avoid calling HAL_ADC_Start_IT() from within the ADC interrupt service routine (ISR) or its callback function. Instead, you should set a flag inside the ISR or callback to indicate that the ADC conversion has completed. Then, in your main loop check this flag and call HAL_ADC_Start_IT() to start the next conversion.

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