GLOBAL and LOCAL variables with IAR EWARM ?

[amoreno]

Posted on February 19, 2009 at 05:02

GLOBAL and LOCAL variables with IAR EWARM ?

[amoreno]

Posted on February 09, 2009 at 13:32

[ This message was edited by: amoreno on 21-04-2009 11:47 ]

[kleshov]

Posted on February 10, 2009 at 09:14

Variables may APPEAR to be corrupted when single-stepping through code in debugger at high optimization levels.

Local variable corruption can be caused by stack overflow. Careless memory manipulation with pointers can cause this too.

[amoreno]

Posted on February 17, 2009 at 14:47

Thank you for reply my post.

To avoid optimizations issues, I have dissabled ALL optimizations (now is runnig with ''NONE for best debug'')

Regarding stack size, I use this,

-D_CSTACK_SIZE=1000

-D_SVC_STACK_SIZE=100

-D_FIQ_STACK_SIZE=100

-D_ABT_STACK_SIZE=100

-D_UND_STACK_SIZE=100

-D_IRQ_STACK_SIZE=800

-D_HEAP_SIZE=800

I think it is enought for my purposse.

I have noted this issue in several differents functions and situations.

Allways is caused by the same, a ''corrupted local variable''.

Are there anything that I can do ?

Really I dont know what to do. Really desperating... :-Y

Ideas are wellcome,

Thanks

ALFA

[kleshov]

Posted on February 18, 2009 at 14:58

There are ways to measure stack usage in target MCU. The way I like to do it is like this: in startup code, fill stack with fixed pattern (say, 0xDEADBEEF, or whatever), let the program run for a while, preferably reproducing the bug, pause the program and inspect stack space - the used stack space will have the fixed pattern overwritten.

Or you can try increasing stack space dramatically: if it doesn't help, it's probably something else then.

[amoreno]

Posted on February 18, 2009 at 15:20

[ This message was edited by: amoreno on 21-04-2009 11:48 ]

[kleshov]

Posted on February 19, 2009 at 05:02

Sorry, I have no time for this.

Maybe you should read some manuals? That's what I normally do, anyway...