On Jun 8, 2012, at 4:54 AM, Ben Barwise wrote:

> interrupt isr()
> {
> int off1 =3D 0;
> }

You'll need to make off1 a global variable, so that references to that name=
 in the isr and references from the main code actually reference the same d=
ata.

Then you'll probably need to make it "volatile" so that the compiler will b=
e warned that it has to keep checking the value, instead of (for instance) =
moving it into a register at the start of main and just referring to that c=
opy over and over again.

BillW


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