Re: [gpsd-users] gpsd mode "update not seen yet" when using 1PPS

[Yakov Shmulevich]

I found that it corresponding to 1PPS parameters configuration in GeoS-3/3M.

Then I configured all parameters with default values by using their proprietary binary protocol, the errors disappear.

I have not explanation, but it works.

Thanks.

On Tue, Oct 29, 2013 at 1:01 PM, Yakov Shmulevich <address@hidden> wrote:

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>:

> 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)?

That is a very weird bug report.

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>