[LinuxPPS] Ntp doesn't work with PPS

[Hal V. Engel]

How about posting your ntp,conf file so we can see how this is configured.  Also 
you might want to capture your clock stats.  For the Oncore this will give you 
a lot more info about what is happening during the initialization process.

Hal 

On Wednesday 30 September 2009 06:59:49 am christophe taffoureau wrote:
> Hi,
> 
> I've installed Linuxpps (patch ntp-pps-2.6.27-rc3-bis.diff) on OPENSUSE
> 11.1 (kernel 2.6.27.7-9).
> I use ppstest to control the effect of pps signal (Motorola ONCORE)
> connected on serial port 0(ppstest /dev/pps0).
> The result is :
> / sudo ./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 1254228986.375717333, sequence: 40 - clear
> 1254228987.370527631, sequence: 41
> source 0 - assert 1254228987.375729944, sequence: 41 - clear
> 1254228987.370527631, sequence: 41
> source 0 - assert 1254228987.375729944, sequence: 41 - clear
> 1254228988.370540747, sequence: 42
> source 0 - assert 1254228988.375742319, sequence: 42 - clear
> 1254228988.370540747, sequence: 42/

This looks OK.

> 
> Now, I install source of ntp and compile with option –enable-ONCORE
> –enable-SHM and create a link with pps0 (oncore.pps.0) and ttyS0
> (oncore.serial.0). The compilation is OK.

Does ./ppstest /dev/oncore.pps.0 work?

> 
> But, when I start the ntp, I've an "error serial pps"
> /linux-ulwj:/dev # /etc/init.d/ntp start
> Starting network time protocol daemon (NTPD)ntpd 4.2.4p4 at 1.1520 Tue Sep
> 29 12:14:13 UTC 2009 (1)
> addto_syslog: precision = 1.000 usec
> addto_syslog: ntp_io: estimated max descriptors: 1024, initial socket
> boundary: 16
> addto_syslog: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled
> addto_syslog: Listening on interface #1 wildcard, ::#123 Disabled
> addto_syslog: Listening on interface #2 lo, ::1#123 Enabled
> addto_syslog: Listening on interface #3 eth0,
> fe80::21a:a0ff:fec5:579e#123 Enabled
> addto_syslog: Listening on interface #4 lo, 127.0.0.1#123 Enabled
> addto_syslog: Listening on interface #5 lo, 127.0.0.2#123 Enabled
> addto_syslog: Listening on interface #6 eth0, 193.55.144.75#123 Enabled
> local_clock: time 0 offset 0.000000 freq 0.000 state 0
> addto_syslog: kernel time sync status 0040
> peer_crypto_clear: at 0 next 0 assoc ID 11392
> peer_clear: at 0 next 1 assoc ID 11392 refid INIT
> refclock_setup fd 5 modem status: 0x4006
> refclock_ioctl: fd 5 flags 0x20
> newpeer: 127.0.0.1->127.127.30.0 mode 3 vers 4 poll 4 4 flags 0x10a1 0x1
> ttl 0 key 00000000
> ntp_syslogmask = 0x0000ffff (=all)
> local_clock: time 0 offset 0.000000 freq 0.000 state 1
> addto_syslog: system event 'event_restart' (0x01) status 'sync_alarm,
> sync_unspec, 1 event, event_unspec' (0xc010)
> report_event: system event 'event_restart' (0x01) status 'sync_alarm,
> sync_unspec, 1 event, event_unspec' (0xc010)
> ONCORE[0]: NO <CR><LF> at end of message
> linux-ulwj:/dev # refclock_transmit: at 1 127.127.30.0
> filegen 2 3463303804 0 3463257600
> auth_agekeys: at 1 keys 1 expired 0
> timer: interface update
> refclock_transmit: at 19 127.127.30.0
> addto_syslog: clock GPS_ONCORE(0) event 'clk_badtime' (0x06)
> addto_syslog: peer GPS_ONCORE(0) event 'event_peer_clock' (0x85) status
> 'unreach, conf, 1 event, event_peer_clock' (0x8015)
> peer GPS_ONCORE(0) event 'event_peer_clock' (0x85) status 'unreach,
> conf, 1 event, event_peer_clock' (0x8015)
> ONCORE: oncore_get_timestamp, error serial pps
> ONCORE: oncore_get_timestamp, error serial pps// /
> 

Did you do an ldattach to setup the line discipline for the pps device?

> And, if I use ppstest software, I have not pps signal:
> /sudo ./ppstest /dev/pps0
> trying PPS source "/dev/pps0"
> found PPS source "/dev/pps0"
> ok, found 1 source(s), now start fetching data...
> time_pps_fetch() error -1 (Connection timed out)
> time_pps_fetch() error -1 (Connection timed out)
> /
> If the assert event doesn't change:
> / #cat /sys/class/pps/pps0/assert
> 1254229133.377654873#187
> # cat /sys/class/pps/pps0/assert
> 1254229133.377654873#187
> # cat /sys/class/pps/pps0/assert
> 1254229133.377654873#187
> # cat /sys/class/pps/pps0/assert
> 1254229133.377654873#187/
> 
> 
> And in the ntp log, I've this message:
> / 30 Sep 14:18:51 ntpd[4458]: offset 0.000000 sec freq 0.000 ppm error
> 0.000001 poll 6
> 30 Sep 14:18:54 ntpd[11516]: system event 'event_restart' (0x01) status
> 'sync_alarm, sync_unspec, 1 event, event_unspec' (0xc010)
> 30 Sep 14:19:28 ntpd[11516]: clock GPS_ONCORE(0) event 'clk_badtime' (0x06)
> 30 Sep 14:19:28 ntpd[11516]: peer GPS_ONCORE(0) event 'event_peer_clock'
> (0x85) status 'unreach, conf, 1 event, event_peer_clock' (0x8015)
> 30 Sep 14:19:45 ntpd[11516]: clock GPS_ONCORE(0) event 'clk_noreply' (0x01)
> 30 Sep 14:19:45 ntpd[11516]: peer GPS_ONCORE(0) event 'event_peer_clock'
> (0x85) status 'unreach, conf, 2 events, event_peer_clock' (0x8025)
> /
> Have you an idea about this problem when I start ntp ?
> 
> Thank for your answer,
> 
> best regards
> 
> Christophe TAFFOUREAU
> 
> 
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