Herbert Graf wrote:
> There are cases where doing "heavy stuff" in the interrupt MIGHT be a
> good idea. Heck I've had cases where doing EVERYTHING in the ISR and
> having the main program consist of just "goto start" all the time made
> sense.

I had a case once where I needed to convert a single serial data stream
(sortof like Manchester) into synchronous clock and data.  There were only
something like 5 instructions per half-bit on a 20MHz PIC.  I did this by
using the interrupt input like a "GOTO 4" input pin.  There was no main code
after initialization.  There was no RETFIE instruction and the stack just
overflowed, but that didn't matter because there were no calls.


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