[LinuxPPS] Kernel configuration and more ......

[Paul]

Thanks for the encouragement, I think if anything some of the things
which to most of the mailing list seem pretty obvious need to be
simplified for a new user. I will try to start work as soon as possible.

Before that I have a couple of queries.
1. As you know I have been puzzled by the behaviour of
the /sys/class/pps/pps0{assert,clear}. I assumed that I would see events
immediately after ./ppsctl /dev/tty0 enable, but I have been told that I
have to have these ports opened by something, and I used minicom to do
this. I then tried to use NTP (with the ATOM clock). No events were
seen. So then I did cat /dev/ttyS0& (and left the process in the
background) and then NTP saw the events and the PPS started to be used
(but see below). Why? Why doesn't NTP open the port itself?

2. When the PPS events were not being seen, the stratum for the PPS was
0, but obviously no connection was ever made. The NTP locked to the web
disambiguating clocks at stratum 2. But when NTP made contact with the
PPS the stratum of the PPS changed to 2. Obviously I can try forcing the
stratum in the ntp.conf file, but why do I need to do this?

Paul

On Thu, 2007-11-01 at 10:54 +0100, Rodolfo Giometti wrote:
> On Wed, Oct 31, 2007 at 05:34:31PM +0000, Paul wrote:
> > Rodolfo
> > (for you, rather than the mailing list)
> > I would like to contribute to the documentation, to help in anyway I can
> > - I am not a programer, so up to now I haven't really been able to help.
> > Can you give me a week or so at least to get my system working before I
> > try to help other people.
> 
> Of course! However consider that even your not a programmer you can
> contribute in several ways, maybe you can report some missing parts or
> contribute to thr FAQ section.
> 
> Take your time and report your modifications when you feel ready to do
> it. :)
> 
> Please, send your modifications as patch to the mail list because I'd
> like other people can see what you propose so they can send their
> comment.
> 
> Thanks for your time,
> 
> Rodolfo
>