Ron Kneusel wrote:
> The program works and everything looks great until you let it run for
> awhile.  Then things start getting out of sync.  I am using the osccal
> value for each device.  While I didn't expect perfect synchronization I
> had hoped it would last more than a few minutes.

Your expectations were unreasonable.  Do the math.  How fast do your flash
patterns advance?  Let's say they advance to a new state every 500mS.  If
the two oscillators are off from each other by 1%, then they would go thru a
complete beat cycle every 100 flashes or 50 seconds.  That means they would
be maximally out of sync in 25 seconds from starting in sync.

Given what you are trying to do, you have a fundamentally bad design.  Don't
blame it on the chips.  If you want 6 outputs, consider using a PIC with
that many output lines.  I think the smallest would be a 14 pin part, like
16F630.


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