[Thumbgps-devel] navisys GR-601W gps on FreeBSD/NTP

[Jim Thompson]

after a long night of hacking, here is the result of about a 5 minute run on FreeBSD 8.3 (a pfSense 2.1 beta that was handy) running on a PC Engines Alix 3d2 board with
the Navisys GR-601W plugged in via USB

[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(655): ntpdc -c kern
pll offset:           0.0131656 s
pll frequency:        25.385 ppm
maximum error:        0.025897 s
estimated error:      0.006287 s
status:               2001  pll nano
pll time constant:    4
precision:            1e-09 s
frequency tolerance:  496 ppm
pps frequency:        24.724 ppm
pps stability:        0.000 ppm
pps jitter:           0 s
calibration interval: 4 s
calibration cycles:   0
jitter exceeded:      0
stability exceeded:   0
calibration errors:   0
[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(656): ntpdc -c "clockstat 127.127.20.0"
clock address:        127.127.20.0
clock type:           Generic NMEA GPS Receiver (20)
last event:           0
current status:       0
number of polls:      21
no response to poll:  0
bad format responses: 0
bad data responses:   0
running time:         338
fudge time 1:         0.155000
fudge time 2:         0.000000
stratum:              0
reference ID:         GPS
fudge flags:          0x5
[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(657): ntpdc -c dm
     remote           local      st poll reach  delay   offset    disp
=======================================================================
*GPS_NMEA(0)     127.0.0.1        0   16  377 0.00000  0.018658 0.02373
 LOCAL(0)        127.0.0.1       10   64   77 0.00000  0.000000 0.43401
.clock.isc.org   192.168.3.166    1   64   77 0.05998  0.045383 0.43512
.199.4.29.166    192.168.3.166    2   64   77 0.04831  0.026922 0.06511
[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(658): ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*GPS_NMEA(0)     .GPS.            0 l    3   16  377    0.000   17.541   4.836
 LOCAL(0)        .LOCL.          10 l   43   64   77    0.000    0.000   0.004
+199.4.29.166    64.90.182.55     2 u   39   64   77   48.317   26.922  19.527
+clock.isc.org   .GPS.            1 u   37   64   77   59.994   45.383  10.124
[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(659): 

and after 10 minutes:

[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(668): ntpdc -c "clockstat 127.127.20.0"
clock address:        127.127.20.0
clock type:           Generic NMEA GPS Receiver (20)
last event:           0
current status:       0
number of polls:      42
no response to poll:  0
bad format responses: 0
bad data responses:   0
running time:         681
fudge time 1:         0.155000
fudge time 2:         0.000000
stratum:              0
reference ID:         GPS
fudge flags:          0x5
[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(669): ntpdc -c dm
     remote           local      st poll reach  delay   offset    disp
=======================================================================
*GPS_NMEA(0)     127.0.0.1        0   16  377 0.00000  0.026902 0.02632
 LOCAL(0)        127.0.0.1       10   64  377 0.00000  0.000000 0.03052
.clock.isc.org   192.168.3.166    1   64  377 0.05960  0.065447 0.03905
.199.4.29.166    192.168.3.166    2   64  377 0.04929  0.070362 0.05154
[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(670): ntpq -p
     remote           refid      st t when poll reach   delay   offset  jitter
==============================================================================
*GPS_NMEA(0)     .GPS.            0 l    2   16  377    0.000   14.092  10.630
 LOCAL(0)        .LOCL.          10 l   46   64  377    0.000    0.000   0.004
+199.4.29.166    64.90.182.55     2 u   40   64  377   49.289   70.362  10.886
+clock.isc.org   .GPS.            1 u   39   64  377   59.612   65.447  10.469


Note that PPS is not working 
[2.1-BETA0][root at pfsense-beta.netgate.com]/dev(659): tail /var/log/ntpd.log 
 3 Jun 09:03:07 ntpd[61833]: synchronized to 199.4.29.166, stratum 2
 3 Jun 09:03:07 ntpd[61833]: kernel time sync status change 2001
 3 Jun 09:03:20 ntpd[61833]: refclock_nmea: time_pps_getcap failed: Inappropriate ioctl for device
 3 Jun 09:03:23 ntpd[61833]: refclock_nmea: time_pps_getcap failed: Inappropriate ioctl for device
 3 Jun 09:03:23 ntpd[61833]: refclock_nmea: time_pps_getcap failed: Inappropriate ioctl for device
 3 Jun 09:03:25 ntpd[61833]: refclock_nmea: time_pps_getcap failed: Inappropriate ioctl for device
 3 Jun 09:03:46 ntpd[61833]: synchronized to GPS_NMEA(0), stratum 0
 3 Jun 09:03:50 ntpd[61833]: refclock_nmea: time_pps_getcap failed: Inappropriate ioctl for device
 3 Jun 09:04:14 ntpd[61833]: refclock_nmea: time_pps_getcap failed: Inappropriate ioctl for device
 3 Jun 09:08:34 ntpd[61833]: refclock_nmea: time_pps_getcap failed: Inappropriate ioctl for device

Will investigate.

Jim