Well, I've managed to wind myself completely up in my huggies....
I built a nice little 18x LVC setup this weekend, based on the circuit at
time.qnan,org. I successfully get data from the GPS (9600 baud) and a PPS
signal. I tried using the gpsd driver and am having no luck with it
whatsoever. So, I have to ask at this point, what exactly did you mean
"just use the shmpps set of routines to set up pps using the shm refclock"?
I am running Fedora 8 Linux, for what that might be worth....
Thanks for any assistance you can provide!
Phil
Debug output from gpsd. Seems to be communicating OK, but loops with
"reconfiguring for garmin serial"
gpsd: <= GPS:
$GPRMC,192734,A,4006.0064,N,08306.3234,W,000.0,203.8,260109,006.5,W,D*19^M
gpsd: GPRMC starts a reporting cycle.
gpsd: GPRMC sets mode 2
gpsd: ntpshm_put: Clock: 1232998054 @ 1232998054.745896
gpsd: <= GPS:
$GPGGA,192734,4006.0064,N,08306.3234,W,2,07,2.4,345.2,M,-32.8,M,,*77^M
gpsd: GPGGA sets status 2 and mode 3 (changed)
gpsd: <= GPS: $GPGSA,A,3,,,10,,15,,21,24,26,29,30,,4.7,2.4,4.1*3E^M,
gpsd: GPGSA sets mode 3
gpsd: <= GPS:
$GPGSV,3,1,11,02,34,096,18,05,03,217,26,10,64,040,25,12,03,207,18*72^M
gpsd: Partial satellite data (1 of 3).
gpsd: <= GPS:
$GPGSV,3,2,11,15,36,171,40,18,02,239,33,21,16,293,21,24,58,314,24*7D^M
gpsd: Partial satellite data (2 of 3).
gpsd: <= GPS: $GPGSV,3,3,11,26,45,149,30,29,60,287,25,30,12,238,32*4C^M
gpsd: Satellite data OK (3 of 3).,
gpsd: <= GPS: $PGRMC,A,,100,,,,,,A,,1,2,1,30*4B^M
gpsd: GPRMC sets mode 0,
gpsd: found $PGRMC,.
gpsd: switch_driver(Garmin Serial) called...
gpsd: Reconfiguring for Garmin Serial...
gpsd: => GPS: $PGRMC,A,,100,,,,,,A,,1,2,1,30*4B\x0d
After running for about the last hour, this is what I continue to see on
the
[r...@splunk /root]# ntpq -p
remote refid st t when poll reach delay offset
jitter
==============================================================================
xSHM(0) .GPS0. 0 l 1 16 377 0.000 -667.98
42.005
SHM(1) .PPS. 0 l - 16 0 0.000 0.000
0.002
x10.255.213.232 128.4.40.12 3 u 31 64 377 0.186 -1.647
0.429
[r...@splunk /root]# cat /etc/ntp.conf
driftfile /var/lib/ntp/drift
server 127.127.28.0 minpoll 4
fudge 127.127.28.0 time1 0.000 refid GPS0
server 127.127.28.1 minpoll 4 prefer
fudge 127.127.28.1 refid PPS
server ntp.wendysi.com iburst
$GPRMC,193313,A,4006.0050,N,08306.3246,W,000.0,203.8,260109,006.5,W,D*1B
$GPGGA,193313,4006.0050,N,08306.3246,W,2,05,2.2,344.7,M,-32.8,M,,*75
$GPGSA,A,3,,,10,15,,24,29,30,,,,,4.0,2.2,3.3*3D,
$GPGSV,3,1,11,02,33,098,34,05,02,215,14,10,62,041,18,15,38,170,38*70
$GPGSV,3,2,11,18,04,241,36,24,60,317,28,29,62,282,27,30,11,236,26*7A
$GPGSV,3,3,11,07,01,042,00,08,03,077,00,12,01,206,00*44,
> You can just use something like gpsd to use the shm hardware clock to run
the pps.
> I would just use the shmpps set of routines to set up pps using the shm
refclock.
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