On Fri, Jul 18, 2014 at 03:20:06AM -0500, Richard R. Pope wrote:
>      I'm replying to myself because it is the part about controlling
> the one second pulse that I just don't know how to do. Do I use a
> timer or do I setup a set of delay loops. The more accurate the one
> second pulse the more accurate that the frequency being displayed is
> going to be.

Exactly.  What you haven't yet said is how accurate you want the pulse
to be, and what else the microcontroller is going to be doing.

If it is doing nothing else, delay loops will be fine.

If it is doing other things, use a timer.

At the end of the day, these two methods are almost identical.

Regardless, you have to know, from the top down in your design, how
much variation you will accept in your pulse frequency.

The variation in both delay loops and timer will depend on your
crystal and thermals.  I wouldn't think of using a resonator.

--=20
James Cameron
http://quozl.linux.org.au/
--=20
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