Hi,

I have tried 3 different ways to reset a WDT.

1> sprinkle the WDT instructions across the project. - Most difficult.

2> Use a timer ISR to reset - Not so reliable.

3> use a timer inconjunction with a bit, keep reseting this bit in the main, and cross check this bit in the ISR routine. - this is what I am following now.

For more, visit
http://www.ganssle.com/watchdogs.pdf

Rgds
Raj Shetgar