From owner-freebsd-stable  Fri Nov  5  8:19:31 1999
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From: John Hay <jhay@mikom.csir.co.za>
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Subject: Re: PPS Timing Interface and ONCORE GPS Clock / NTPD
In-Reply-To: <19991105155011X.mrc@ChipChat.com> from Marty Cawthon at "Nov 5, 1999 03:50:11 pm"
To: mrc@ChipChat.com (Marty Cawthon)
Date: Fri, 5 Nov 1999 18:17:13 +0200 (SAT)
Cc: freebsd-stable@FreeBSD.ORG
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You don't say which version of ntp you are using. If you are using something
older than ntp-4.0.98b, please read the message I sent on Oct 16 to
freebsd-stable with the subject line:

HEADS UP: ntpd users

If you are using ntp-4.0.98b or later tell me and I will look into it,
because it is working for me.

John
-- 
John Hay -- John.Hay@mikom.csir.co.za

> SUMMARY:
>   ONCORE GPS Clock source for NTPD on FreeBSD was working
> with 3.3-Stable (Oct 8 1999). With 3.3-Stable (Nov 4 1999)
> NTPD fails with a 'time_pps_setparams: Inappropriate ioctl for device'
> message.  It seems that '/dev/pps' may have been changed to '/dev/lppps0'
> 
> REFERENCE:
>   http://phk.freebsd.dk/ntp/
> 
> DISCUSSION:
>   I had a GPS Clock working with FreeBSD 3.3-Stable
> as described at http://phk.freebsd.dk/ntp/
> 
>   Using FreeBSD 3.3-Stable (as of Oct 8 1999) I had this working.
> NTPD would execute and diagnostic messages from the 'ONCORE' GPS
> receiver would appear on STDOUT.
> 
>   I recently upgraded to 3.3-Stable (Nov 4 1999).
> Now the NPTD program exits with a message:
> 
>   #ntpd -d -d
>   <some messages cut>
>   getnetnum given 127.127.30.0, got 127.127.30.0 (7f7f1e00)
>   poll_update: at 0 127.127.30.0 poll 6 next 63
>   refclock_open: fd 8 modem status 7
>   refclock_ioctl: fd 8 flags 20
>   time_pps_setparams: Inappropriate ioctl for device
> 
> So it seems that there is trouble with 'time_pps_setparams'.
> 
> I checked 'dmesg' to see if the pps device appears:
>    $dmesg | grep pps
>    lppps0: <Pulse per second Timing Interface> on ppbus 0
> 
> This 'lppps0' device (3 p's) looks strange to me.
> 
> I tried changing the name of /dev/pps to be /dev/lppps0
> but to no avail.
> 
> It seems that something may have changed in 3.3-Stable
> between Oct 8 and Nov 4 with respect to the pps device.
> 
> Perhaps somebody can provide a pointer for me with respect
> to this problem.
> 
> Marty Cawthon
> ChipChat


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