How to use The ESP32 second core?

[Tangerino]

Is it possible to attach a function to a second core to handle critical conditions?

[dpgeorge]

See #7258 for a related discussion. That is now resolved by 3570785, MicroPython now runs on core 1 (the second core).

[Tangerino]

I'm sorry but did not get your point.

I have a time critical process and wish to run it in the second core so I can handle sec events.
Like _thread.new_thread(core=2, f=func)

Thank you

[mocleiri]

You can´t do it in micropython itself but you can configure other FreeRTOS tasks and set the core there. Then you would communicate between your new tasks and a module in micropython.

For example the machine_i2s implementation has a non-blocking mode where a new FreeRTOS task is created and runs beside micropython and uses a queue to send data back into micropython.

micropython/ports/esp32/machine_i2s.c

Line 593 in fbd47fc

if (xTaskCreatePinnedToCore(

In this case the helper task is running on the same core but that MP_TASK_COREID can be changed to refer to the other core.