Hello all,

I don't remember who posted it, but a few days ago, someone made a
suggestion that, instead of having the SSU time the time interval between
pulses, it just send a pulse whenever it receives an echo and count the
number of pulses it sends out. I think that this is a great idea because it
naturally provides for regular reporting intervals, i.e., the code could go
like this:

set up interrupt every 100 ms (or whatever delay you want)

a: send pulse
wait for receive pulse
when received, increment counter
goto a

interrupt:
send counter value
counter = 0
return

I will try this in my prototype.

Sean

+--------------------------------+
| Sean Breheny                   |
| Amateur Radio Callsign: KA3YXM |
| Electrical Engineering Student |
+--------------------------------+
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