[LinuxPPS] LinuxPPS 5.0.0-rc1

Rodolfo Giometti giometti at enneenne.com
Thu Aug 9 17:44:28 CEST 2007


On Thu, Aug 09, 2007 at 05:26:37PM +0200, Udo van den Heuvel wrote:

> Thanks for taking the steps that might take LinuxPPS to teh final
> inclusing into the kernel!
> What I am wondering about is the consequences to the refclocks.
> What should I change in the NMEA patch for example?
> I don't yet understand fully.
> 
> Can someone please explain?

If you see last letters with Frank in this ML's archives you can see
what you have to do. Take a look at refclock 8 (named PARSE):

   http://www.ee.udel.edu/~mills/ntp/html/drivers/driver8.html

it can consider one or two devices.

If you supply one device it tries to read both GPS and PPS data from
it, but if you supply 2 devices it tries to read GPS data from
/dev/refclock-u while PPS data from /dev/refclockpps-u.

You should modify your refclocks in order to do like PARSE does.

The resulting patch will be more likely accepted into NTP main line
(as Frank said ;).

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
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