[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [gpsd-users] Is GPSD receiving PPS?
From: |
Jon Brase |
Subject: |
Re: [gpsd-users] Is GPSD receiving PPS? |
Date: |
Fri, 04 Mar 2016 02:57:22 -0600 |
User-agent: |
Opera Mail/12.16 (Linux) |
On Thu, 03 Mar 2016 18:22:00 -0600, Gary E. Miller <address@hidden> wrote:
gpsmon only shows one device at a time. Your configuration is using
two devices: one the GPS serial, and one the gpio.
Gpsd works fine if you just specify the both devices:
gpsd /dev/tty[your-gps] /dev/pps[your-pps]
OK. It's not made really clear in the documentation that specifying
anything but a serial device is even an option.
In any case, I'm now launching gpsd with the command line:
gpsd -n /dev/ttyAMA0 /dev/pps0 -F /var/run/gpsd.sock
to launch it as a daemon at boot, or:
gpsd -F /var/run/gpsd.sock -nND 5 /dev/ttyAMA0 /dev/pps0
For having a look at the debug output at runtime
(The port change there is because Raspbian uses systemd, whose init seems
to "helpfully" grab ports daemons started in boot scripts and pass traffic
on those ports through to the process. If the process dies or the service
is stopped, init doesn't let go of the port. So if I shutdown the
boot-time daemon to run gpsd in a terminal for debugging, I have to start
it on a different port).
In any case, with that command line, I am now seeing different output with
regards to PPS. GPSD still seems to be having trouble getting valid PPS
data, but ppstest still seems to have no trouble.
pptest gives me lines of the form:
source 0 - assert 1457080600.005932677, sequence: 14275 - clear
0.000000000, sequence: 0
source 0 - assert 1457080601.005952941, sequence: 14276 - clear
0.000000000, sequence: 0
source 0 - assert 1457080602.005933205, sequence: 14277 - clear
0.000000000, sequence: 0
And continues with a new line every second for as long as I leave it up.
I've attached the output I'm getting from GPSD. The first section is
printed one time when I start GPSD, and I've cut it off just before the
point that GPSD starts printing my ICBM address. The second section
appears every second or two once GPSD is up and running. (I'm not sure of
list etiquette here. Is it preferred to paste things in the ~100 line
range directly into an e-mail body, or to attach them?)
Jon Brase
gpsdOutput.txt
Description: Text document
- [gpsd-users] Is GPSD receiving PPS?, Jon Brase, 2016/03/03
- Re: [gpsd-users] Is GPSD receiving PPS?, Jon Brase, 2016/03/03
- Re: [gpsd-users] Is GPSD receiving PPS?, Jon Brase, 2016/03/03
- Re: [gpsd-users] Is GPSD receiving PPS?, Gary E. Miller, 2016/03/03
- Re: [gpsd-users] Is GPSD receiving PPS?,
Jon Brase <=
- Re: [gpsd-users] Is GPSD receiving PPS?, Gary E. Miller, 2016/03/04
- Re: [gpsd-users] Is GPSD receiving PPS?, Alexander Carver, 2016/03/04
- Re: [gpsd-users] Is GPSD receiving PPS?, Jon Brase, 2016/03/05
- Re: [gpsd-users] Is GPSD receiving PPS?, Jon Brase, 2016/03/05
- Re: [gpsd-users] Is GPSD receiving PPS?, Jon Brase, 2016/03/05
- Re: [gpsd-users] Is GPSD receiving PPS?, Gary E. Miller, 2016/03/06
- Re: [gpsd-users] Is GPSD receiving PPS?, Bo Berglund, 2016/03/06
- Re: [gpsd-users] Is GPSD receiving PPS?, Gary E. Miller, 2016/03/06
- Re: [gpsd-users] Is GPSD receiving PPS?, Bo Berglund, 2016/03/07
- Re: [gpsd-users] Is GPSD receiving PPS?, Bo Berglund, 2016/03/07