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

[Simon Han]

Hi Keith,
        Thank you for quick response.
	My understanding is that some_variable will be set to zero during 
avr-libc initialization.  Maybe I misread the manual?

Simon

On Tuesday, February 3, 2004, at 12:52 PM, Keith Gudger wrote:

> 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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