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Re: [gpsd-dev] PPS over USB
From: |
Gary E. Miller |
Subject: |
Re: [gpsd-dev] PPS over USB |
Date: |
Wed, 2 May 2012 14:24:26 -0700 |
Yo Håkan!
On Wed, 2 May 2012 22:42:42 +0200
Håkan Johansson <address@hidden> wrote:
> > the ublox 6 has a special mode for single sat operations.
>
> Also the oncore has this mode. I do not remember if the patches
> bypass the 'require-2d-fix to allow PPS timing' when the oncore
> device reported time as collected in this mode got into gpsd. I'd
> need to get my equipment running again...
I looked a little deeper at the code. esr changed the code a while back
so that each driver needs to set PPSTIME_IS to mark that the PPS is good
by that drivers standards. In spite of its name it also conditions
the sending of NMEA or binary time to ntp/chrony.
The garmin and NMEA 183 drivers set PPSTIME_IS after 4 consecutive 2D or
better fixes.
I see code in the uBlox driver to the handle single sat time case, but
it looks a little off to me. When in time mode it sets 3D mode which
seems odd if time mode is single sat.
RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
address@hidden Tel:+1(541)382-8588
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- [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/01
- Re: [gpsd-dev] PPS over USB, Dave Taht, 2012/05/01
- Re: [gpsd-dev] PPS over USB, Jim Thompson, 2012/05/01
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/01
- Re: [gpsd-dev] PPS over USB, Hal Murray, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Jim Thompson, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Gary E. Miller, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Chris Kuethe, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Dave Taht, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Håkan Johansson, 2012/05/02
- Re: [gpsd-dev] PPS over USB,
Gary E. Miller <=
- Re: [gpsd-dev] PPS over USB, Chris Kuethe, 2012/05/02
- Re: [gpsd-dev] PPS over USB, Eric S. Raymond, 2012/05/06
- Re: [gpsd-dev] [Thumbgps-devel] PPS over USB, tz, 2012/05/02
- Re: [gpsd-dev] [Thumbgps-devel] PPS over USB, Gary E. Miller, 2012/05/02
- Re: [gpsd-dev] [Thumbgps-devel] PPS over USB, tz, 2012/05/02
- Re: [gpsd-dev] [Thumbgps-devel] PPS over USB, Hal Murray, 2012/05/02
- Re: [gpsd-dev] [Thumbgps-devel] PPS over USB, tz, 2012/05/02
Re: [gpsd-dev] PPS over USB, Ed W, 2012/05/04