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Data Aborts, unexpected results, crashes!

Posted by Janaka on January 12, 2006
First of all let me say that FreeRTOS is a Great project!

Problem: I was doing some USB stuff on a AT91SAM7S64 when I was getting Data Aborts (dabtvec), Prefech Aborts (pabtvec) and other unexpected results and eventual crashes (hangups).

Cause:
Lack of task stack space. I was setting the task stacks to 100 (in SAM7 it is 100x4 bytes). My estimations of local variable calculations were correct BUT the GOTCHA was the functional depth. I totally ignored the stack usage when functions are called. As you get deeper it uses more stack to store your parameters etc.

Solution:
Increased the stack size. Its working like a charm since then!

Cheers

RE: Data Aborts, unexpected results, crashes!

Posted by Nobody/Anonymous on January 13, 2006
Thanks for the feedback.


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