STM32H563 ADC Discontinuous Mode

mccabehm · ‎2025-09-30

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.

Saket_Om · ‎2025-10-01

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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Saket_Om

View solution in original post

Saket_Om · ‎2025-10-01

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.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.
Saket_Om