On 10/10/2011 9:26 AM, IB Peter Feucht wrote:
> But when a BOR occured during operation, the software will never reach th=
e
> end of the software, thus the variable stays set and on next start the
> software sees a set variable and based on this I can decide to disable
> starting the software again. Just blink some leds and go to sleep again.
>
> Anyone did this before? Hopefully I have some time tonight to write the
> software.
>
> Best regards
>
> Peter
>
>

The way I handle this is to monitor the status of the reset and if it=20
ever indicates that the fault was due to
a power failure then the software sets a bit in the eeprom and powers=20
off. On power up the code checks this bit, if it is set then the device=20
will beep 3 times to give the user the chance to press a keypad button=20
telling the device the battery is changed, if pressed  the bit is reset=20
and the device functions like normal. If no key press then the device=20
powers off.
This also has the advantage of alerting the user to the reason why the=20
device turned off last time when things like good batteries but corroded=20
terminals, loose fitting batteries were the problem.


Mark

--=20
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