[LinuxPPS] NTP not using PPS

[Rodolfo Giometti]

On Wed, Oct 24, 2007 at 05:02:44PM -0000, susmi sarah george wrote:
> 
>    hi,
> 
>    Thanks for reply,
> 
>    my serial port is      : ttyS3
>    my LinuxPPS Source is  : pps3
>    i have done in this way,

Ok.

>    ln -s /dev/ttyS3 /dev/gps0

Not wrong, but you should do:

   ln -s /dev/ttyS3 /dev/gps3

>    ln -s /dev/pps3 /dev/pps0

Wrong! Remove the link. 

>    my ntp.conf file :
> 
>    # time synchronization with our time source, but do not
>    # permit the source to query or modify the service on this system.
> 
>    restrict default nomodify notrap noquery
> 
>    restrict 127.0.0.1
> 
>    #enable stats
>    #statsdir /var/log
>    #statistics loopstats
>    logconfig = all
> 
>    enable stats monitor pps
> 
>    # --- OUR TIMESERVERS -----
> 
>    #NMEA + PPS
>    server 127.127.20.0 mode 1 prefer minpoll 4
>    fudge 127.127.20.0 flag3 1 flag2 0 time1 0.0

I'm not refclock guru (maybe Udo can help you) but I suppose you
should use:

   server 127.127.20.3 mode 1 prefer minpoll 4
   fudge 127.127.20.3 flag3 1 flag2 0 time1 0.0

so NMEA refclock should try to open /dev/gps3 and /dev/pps3...

Ciao,

Rodolfo

-- 

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