Task stack size

[s.allasia]

Hi,

How I can determine a stack size when I create a task (xTaskCreate)?
Can you tell me what factors need to be consider for calculating a task stack size?

Thanks!

[f.h-f.s.]

You need the stack space for all the variables in the scope of that task. (not including malloc, which goes on the heap)
You can see how much of that space is/was used by calling "uxTaskGetStackHighWaterMark(NULL)" inside the task. Or passing the task handle instead of NULL, calling the function from anywhere.

[s.allasia]

Ok, thanks I tried that you suggested to me.
So do I have to find the value empirically?

[Gfast2]

I start with a safe / big enough stack size, then try to call

uxTaskGetStackHighWaterMark(NULL)

monitor how is the "High Water Mark", then lastely I shrink down the stack size I allocated before. 8192 is what I tried first normally.

Cheers

Gfast2

[s.allasia]

Ok, thanks a lot Gfast2!
I do in your way.