I am writing a OneWire protocol handling task and I am using a timer ISR with IRAM attribute set to achieve precise timing (order of uS) needed to handle One Wire protocol. Can I use regular GPIO API functions inside IRAM ISR? If not, how can I read, write and change direction of the GPIO (on the fl...

Hi guys, I wander what exact condition(s) in uart rx data stream have to be met for the uart driver to fire an UART_DATA event. Is it a timeout between successive bytes and if so, what is the timeout and can it be adjusted? Or, is it something else that triggers this event.

Thanks.

I know there is uxTaskGetStackHighWaterMark FreeRTOS function which can be used to get the minimum size of unused task stack, but I wonder if there is a ESP-IDF way of achieving this.

Also I would like to know what is the best method for watching the free heap size.

Yes, you could just use a specific set of priority levels for each core, not mixing them together and that solves the problem. This then leads to the next question - are the API tasks pinned to a specific core, which one (I guess the PRO core) and what priority levels do they use?

I am quite new to ESP32, coming from PIC32 MCUs which are all single core. So I would like to check if I'm right when it comes to running FreeRTOS scheduler on two cores. It seems to me that if a task is pinned to one core, than this task could be skipped by scheduler in round robin scheme (same pri...