[ntp:questions] Driver Help?
karl at denninger.net
Tue Jun 12 21:55:17 UTC 2007
I'm hacking a copy of the NMEA driver to work with the CDMA modems
(which provide a clock signal even if not subscribed - kinda
interesting) and have it talking to the device.
But - even though the dispersion looks reasonable and so does jitter,
the application refuses to consider it "synced".
I have the following.....
system peer: CDMA(0)
system peer mode: client
leap indicator: 11
root distance: 0.00000 s
root dispersion: 0.00165 s
reference ID: [220.127.116.11]
reference time: 00000000.00000000 Thu, Feb 7 2036 0:28:16.000
system flags: auth monitor ntp kernel stats
jitter: 0.001129 s
stability: 0.000 ppm
broadcastdelay: 0.003998 s
authdelay: 0.000000 s
remote local st poll reach delay offset disp
*CDMA(0) 127.0.0.1 0 16 377 0.00000 0.241065 0.00697
Obviously, I'm missing SOMETHING....... the dispersion looks reasonable,
but it will not lock up on the clock. Any idea where I start?
Oh, the other thing I've run into is that the START routine is never
called if I don't run the application with debugging turned on (!); no
errors logged, just no startup. I stuck a syslog in the "start" routine
right at the front - it never gets executed if the ntpd app is in the
This might be a nice driver to contribute.... if I can get the dang
thing working! :-)
Karl Denninger (karl at denninger.net)
More information about the questions