> Bob
> I've  moved the cs activation code before the pulse code.
> I am confused here? Do I add the Label srupdate or come up with some code
to
> update the srlo and sr hi registers.

The later. You'll need code to convert from hours/minutes/seconds to
whatever you have to send to the Max7219. Hold ona sec... I'll go look up
the 7219 datasheet and give you more details...

Ah....

The 7219 is a pretty smart beast. Here are the steps you'll have to perform,
which are non-trivial:

(1) Set the 7219 up in 'decode mode' so you don't have to figure out exactly
what segments to turn on in your own code. This can be done at program start
up, or to make sure it doesn't get corrupted, on a periodic basic.

(2) Convert the values of hours/minutes/seconds to the values/commands that
need to be sent to the 7219. This will involve converting from the internal
binary format, to BCD. I would probably make this simpler by changing the
way I keep time to keep each digit in a separate register: ie: sec1 (units
of seconds), sec10 (tens digit of seconds), min1, min10, hour1, hour10.

(3) You will need to convert the code that writes to the Max into a
subroutine, because you'll need to call it repeatedly to output all the
digits.

I know that sounds a bit overwhelming, but you should start tackling it a
bit at a time.

First, I'd recommend modifying your counting code to keep each digit in a
separate values as described in (2) above. When  you think you have that
right, post back to thelist.

Bob Ammerman
RAm Systems

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