[ntp:questions]ONCORE driver

Ulrich Windl Ulrich.Windl at RZ.Uni-Regensburg.DE
Fri Aug 22 08:50:07 UTC 2003

"Xuehuan Li" <libryant at hotmail.com> writes:

> i use a motorola GPS card as my server, and the driver i choose is the
> oncore driver(type 30). my linux version is 2.4.20 with pps patch, and
> the ntp version is 4.1.2. after ntpd configured the card, it was most
> likely just stay at some position to wait for the some condition to be
> satisfied. in the log file 'clockstats' it print the following
> sentences time and time again. 52857 53939.486 Resetting
> timing to Assert.
> 52857 53939.486 HARDPPS Set.
> 52857 53966.208 Resetting timing to Assert.
> 52857 53966.208 HARDPPS Set.
> in the ntpq, i try cl command, and it prints below where the 'noreply'
> always equals to 'poll'-2.
> status=0101 clk_noreply, last_clk_noreply,
> device="Motorola Oncore GPS Receiver", timecode=, poll=948, noreply=946,
> badformat=0, baddata=0, fudgetime1=0.000, stratum=0, refid=GPS, flags=4
> anybody knows what the ntpd is waiting for? i am very sure that the
> pps and the serial signal have been received by the PC.

See the "PPS spy" Perl script and "ppsctl" C program, both from
PPSkit. They will help you debugging kernel and PPS API. If that works
OK, it's very likely a problem in ntpd.


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