[LinuxPPS] NMEA Refclock in ntp-dev does not work

[Rodolfo Giometti]

On Mon, Oct 19, 2009 at 05:23:40PM +0200, Udo van den Heuvel wrote:
> On 2009-10-19 09:35, Rodolfo Giometti wrote:
> > On Sat, Oct 17, 2009 at 07:01:12AM +0200, Udo van den Heuvel wrote:
> >> On 2009-10-16 20:01, William S. Brasher wrote:
> >>>
> >>> The NMEA refclock, refclock_nmea.c, from ntp-dev-4.2.5p233-RC does not 
> >>> work for me.  NTP refuses to use it as a time source and rejects it and 
> >>> PPS.
> >>
> >> That is correct.
> >> After three years the ntp folks succeeded in not incoroorating the
> >> needed patch to refclock NMEA but to do their own changes to PPSAPI.
> > 
> > Which changes they applyed to the PPSAPI?
> 
> Others.
> 
> Please have a look at http://bugs.ntp.org/610 again, comment #74 needs a
> proper answer why we need two files for input: one for NMEA and one for PPS.

Because official Linux PPS support considers a PPS source as a single
device not related with the serial port one.

We already discussed this stuff with NTPD gurus in the past (please
try using google to find out such discussions - maube something is in
this list also).

Ciao,

Rodolfo

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