scheduler priority

[Diogo]

I am trying to use the scheduler, but I would like to know if it is possible to have events with different priorities... As an example:

Task A - Priority LOW Task B - Priority LOW Task C - Priority HIGH Task D - Priority LOW

Having a scheduler queue like: Queue position 1st: Task A (executing this task) Queue position 2nd: Task B (in the queue) Queue position 3rd: Task C (in the queue) Queue position 4th: Task D (in the queue)

The behaviour I need is once Task A is complete, it should execute Task C (higher priority), then Task B and finally Task D (assuming no more events appear in the queue).

Is this behaviour possible? I haven't found any example where something like this is implemented...

Thanks in advance.

Diogo

[awneil]

Duplicate: devzone.nordicsemi.com/.../

[Einar Thorsrud]

There is no support for priorities in the Scheduler. In fact the Scheduler in the SDK is very simple and the only purpose of it is to move execution of code from a interrupt context to the main context.

If you need a more advanced scheduler you may want to consider using an RTOS.

[Diogo]

Thanks Einar.

I see that there is RTOS support on the SDK using the RTX api. Is there a place where I can find its requirements? Mainly the RAM memory it uses?

Thanks once again for the prompt answer.

[Einar Thorsrud]

You can find the RTX Memory Requirements here.