ESP32 Forum

Somewhere in my mind is a post use of api calls in ISR
How can I find more information about that.
Is there something like a list of free_to_be_used_in_ISR

Actual problem is around using gettimeofday, where application crashes from time to time

Essentially, all FreeRTOS calls that end in fromISR can be called from an ISR. Apart from that, no esp-idf calls, unless explicitly indicated otherwise, are guaranteed to behave themselves when called from an ISR.

So gettimeofday should not be called in ISR ?
What could I use instead ?