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mccabehm
Senior
September 30, 2025
Solved

STM32H563 ADC Discontinuous Mode

  • September 30, 2025
  • 1 reply
  • 276 views

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.

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_OmBest answer
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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