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From: | Yakov Shmulevich |
Subject: | Re: [gpsd-users] gpsd mode "update not seen yet" when using 1PPS |
Date: | Tue, 29 Oct 2013 15:28:47 +0200 |
I am using GPS receiver GeoS-3/3M
On Mon, Oct 28, 2013 at 7:04 PM, Eric S. Raymond <address@hidden> wrote:
Yakov Shmulevich <address@hidden>:
That is a very weird bug report.> I am working with GPS module through FT2232H with 1PPS on DCD pin.
> I am getting GPS data via shared memory export supported by libgps and try
> to get GPS data every ~1.5 sec.
> But sometimes I get "update not seen yet" in gpsdata.fix.mode.
> If I disconnect the DCD pin (connect it to 3.3V) from 1PPS, the problem
> disappear.
> What may be a reason for such behavior?
> Can it be corresponding to 1PPS polarity positive or negative (I use
> positive)?
I have no real idea what's going on here, but we need to figure it out.
It sounds as though the handling of PPS is somehow triggering a call to
gps_clear_fix().
What GPS are you using?
--
<a href="" href="http://www.catb.org/~esr/" target="_blank">http://www.catb.org/~esr/">Eric S. Raymond</a>
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