Daniel Watford wrote:
>
> Hi Caisson,
>
> Just a quick message to say thanks for the explanation.
>
> It does sound that if used properly the watchdog timer can be a very usefull
> feature.
> Is it just a case that when using it you must issue the CLRWDT command.
>
> Thanks again
>
> Dan

  Watchdog Timer's pretty much mandatory on life-critical systems (On
avionics, for example, you don't want a 747 crashing into the ground
because your ground proximity warning system's been hung for the last 3
hours, due to a cosmic ray ionizing things & crashing your GroundProx
system.)  Wouldn't be good if the CPU in someone's pacemaker crashed,
either...  I prefer "Feed the dog" to "Kick the dog" which some people
use when resetting the Watchdog Timer (Dogs're FAR happier when fed
treats, then when kicked!)  WDT isn't particularly necessary on LED
blinkers & so on <G>

  Mark