Dear Listmembers,
first of all sorry for my bad english, but I'm not a native speaker and not
trained so well ;-)
I tried to get ntpd working with a pps signal (atom driver) under Ubuntu 10.04
since one week without success. I'm using a self compiled kernel 2.6.34.3 with
pps support and pps_client ldisc built in. "pstest" shows following data, so I
think it is generally working:
r...@chaser:/home/fast# /export/pps-tools/ppstest /dev/pps0
trying PPS source "/dev/pps0"
found PPS source "/dev/pps0"
ok, found 1 source(s), now start fetching data...
source 0 - assert 1282565685.198781684, sequence: 352669 - clear
1282213025.923967757, sequence: 10
source 0 - assert 1282565686.198843801, sequence: 352670 - clear
1282213025.923967757, sequence: 10
source 0 - assert 1282565687.198921096, sequence: 352671 - clear
1282213025.923967757, sequence: 10
I compiled ntpd with --enable-atom option, but when I start ntpd it shows
following error in the log:
16 Aug 10:36:00 ntpd[17210]: refclock_newpeer: clock type 22 invalid
16 Aug 10:36:00 ntpd[17210]: 127.127.22.0 interface 127.0.0.1 -> (null)
But i think the problem has maybe nothing to do with ntpd directly so far,
because ntptime shows only PLL, NANO and not PPSXXXX in the status field:
ntp_gettime() returns code 0 (OK)
time d01ce7a9.c30c885c Mon, Aug 23 2010 14:27:21.761, (.761910415),
maximum error 257004 us, estimated error 458 us
ntp_adjtime() returns code 0 (OK)
modes 0x0 (),
offset -42.572 us, frequency 17.326 ppm, interval 1 s,
maximum error 257004 us, estimated error 458 us,
status 0x2001 (PLL,NANO),
time constant 6, precision 0.001 us, tolerance 500 ppm
So is the kernel not detecting the PPS, even though ppstest shows the signal
etc.?
I don´t know how I can proceed, miss I something else, do someone have any
hints for me?
Many thanks in advance and kind regards from Berlin,
Frank
____________________________________________________________________
Frank Burkhardt Fraunhofer FOKUS
Dipl.-Kfm. Forschungsinstitut für Offene
Kommunikationssysteme
Network research Kaiserin-Augusta-Allee 31
10589 Berlin
Tel.: 030-34 63-71 88 Tel.: 030-34 63-70 00
Fax: 030-34 63-81 88 Fax: 030-34 63-80 00
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