Hi Can you please tell me how can I know if I am in task or ISR ? Is there an freeRTOS API for this issue ? Thank You Michael

You can always query the hardware itself, other than that it depends which port you are using. If you are using Cortex-M then you can call xPortIsInsideInterrupt().

I’m using MIPS. Is the function port_IsInISR() is good for that purpose ? Thanks

The PIC32 MIPS port? If so you can just check the uxInterruptNesting variable, which is declared in the port.c file for that port. If its not zero then you are in an ISR.

Thank you very much Richard