When a watchdog timeout occurs, it could be the result of many causes. The code could be 'out in space' due to a bad pointer corrupting anything it wants to. It could be due to a fault condition that did not affect data space. Who knows?
Since the watchdog reset is considered a 'hard reset' we know where it will then start execution from.
If I want to save existing data ram into flash prior to executing __main() I would think the place to do this would be here:
; Reset Handler Reset_Handler PROC EXPORT Reset_Handler [WEAK] IMPORT __main LDR R0, =__main BX R0 ENDP
I could jump into a routine which calls an IAP command to save RAM to flash and then return to finish the startup.
I would have to EXPORT the routine I want to jump to as well as load the LR with the return value. Is there anything else that I am missing?
BTW: the processor is a Cortex M3 core.
Thanks.
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