Many thanks for those who help me! (:
I got a problem here...
If i were to use 3 types of interrupts(external interrupt0, timer0 and timer1) in one single program, how should i go about writing the codes in the program?
Agreed, but consider the following: if your main controller and the backup run the same code and are generally the same system, it is very possible the even the backup will not deal well with the conditions that killed daddy (given that it is a software failure, of course). example? The Arian 5 self destruction...