Using ATmega 168. INT0 works fine as does Timer1.
Invoke INT1 (pushbutton rising edge) and it goes to interrupt routine and
never returns.
Had some sample parts from rep brought in to
replace original ES (preproduction) parts. Thought that might be the problem.
Not so.
Doesn't matter what's in the interrupt routine. Can
put the RETI as the only instruction and still doesn't return to the instruction
following an infinite loop.
Doing a lot of head-banging on this
one.
Any ideas
Thanks
Dennis