Re: [avr-gcc-list] preserve state during watchdog reset

[Keith Gudger]

If you don't have an initial value set for a variable (in RAM), it should
retain it's value through a reset.  In other words:

uint8_t some_variable;
uint8_t some_other_variable = 0x80 ;

some_variable, while undefined initially, will hold whatever value it had
before WatchDog reset, while some_other_variable will *always* get reset
to 0x80;

Keith

On Tue, 3 Feb 2004, Simon Han wrote:

> Hi all,
>       Does anyone figure out a way to preserve state during watchdog reset?
>       I am using watchdog to monitor for some of my functions.  Before and 
> after function calls, I do a watchdog reset.  Now the problem is how I 
> can figure out which function caused the watchdog timeout.  I was 
> thinking to store this information in EEPROM, but the delay of doing 
> this is way too high.  Will it be possible to assume certain registers 
> are not reset?
> 
> Any suggestions?
> Simon
> 
> 
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