[Xastir] First Time CVS source

[Stephen West-Fisher]

Curt Mills, WE7U wrote:
> On Thu, 10 Jul 2003, Stephen West-Fisher wrote:
> 
> 
>>Yep, it's getting valid strings and positions. However, it's never
>>switching back. Now I understand why you didn't understand me about the
>>timing. The previous code was not switching back to TNC mode when it
>>received a valid position, it would wait until the timer setting time.
>>For instance, if the Timing was set for 60 seconds, it would listen to
>>the GPS for 60 seconds with DTR low, then DTR would go high for 60
>>seconds, then back to the GPS for 60 seconds, etc. Note that even though
>>DTR would go high, and I would see the recieve light on the TNC, and the
>>light on the tester would flicker, Xastir never showed the red arrow, or
>>  displayed any knoledge of the reception. Now, with DTR on a continious
>>low, the red reception arrow is constantly lit.
> 
> 
> Here's what I see:  With an HSP interface configured, and a GPS
> plugged straight in, I get no visible indication that the DTR line
> is switching, but it is.  It's just rather fast.  I have an LED
> breakout box on the line.
> 
> I suspect that if I plug in an HSP adapter as well, the switching
> will be slower, as it'll only be actually receiving from the GPS
> when the DTR line is low.  With my test setup, it's receiving from
> the GPS all the time, so the parsing of the GPS data is nearly
> instantaneous and it brings the line back up high right away.
> 
> If I unplug the GPS, at the GPS check interval, the LED changes from
> green to red:  It's waiting for GPS data.  If I then plug the GPS
> back in, the LED goes back to green at the next GPS check interval.
> 
> If you configure an HSP port, it will get stuck with DTR low trying
> to read the GPS if a GPS is not present or if the serial parameters
> are wrong and Xastir can't parse any GPS strings.  We should
> probably tweak that so that Xastir pops back to TNC mode if it
> hasn't parsed GPS strings within two seconds or so.
> 

This is not the case, I was using it mobile yesterday. It knows where it 
is, so it must be reading the GPS, correct? It's just not listening to 
the TNC. However, it knows it there 'cause it correctly transmits it's 
position, as verified on my home machine.

> The rest of the time the DTR line will be active, unless Xastir is
> writing waypoints to the GPS.
> 
> I made some minor tweaks to the code.  May have helped, might not
> have.  Check it out in about 24 hours when the changes show up on
> the anon CVS server.
> 
> In the meantime I'll try to make it pop out to TNC mode if it's not
> parsing GPS strings.  Better partial operation than none at all.
> 

You are getting a different response than me. If I leave the HSP 
configured, and plug the GPS into my tester directly, no HSP cable, DTR 
goes low and stays low. DR flickers as the GPS strings come across the 
line, Xastir shows a solid incoming red line on the interface.

I'll see what happens with the new code, thanks!

-- 
Stephen West-Fisher
Coastal Data Systems
727.418.9774
http://www.coastaldatasystems.com/