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Stack Size of A task in Free RTOS

Posted by gauravpatni on May 2, 2016

Hi,

Can anyone please give the basics of task's Stack size calculations ?

As per the baics of Stack & context switching , Context gets saved in Stack before executing high prioity tasks.

As per my understanding , Context means CPU registers.

But in any Microcntroller number of CPU registrs are limited for eg. for PIC32MX Coprocessor 0 has max 32 registers outof which only 13 are in used ( excluding reserved resisters ) .

So for context switching / saving we need only ~13 x4 = ~52 bytes of RAM .

Then why we need to allocate much higher RAM for Stack I task creation ?

Thanks, Gaurav


Stack Size of A task in Free RTOS

Posted by rtel on May 2, 2016

See the following FAQ item: http://www.freertos.org/FAQMem.html#StackSize


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