Re: [gpsd-users] Blocked device when using ldattach

[Tomalak Geret'kal]

[reinjected into the list]

> > > > > Why not let gpsd handle the PPS for you?  PPS without knowledge of
> > > > > the current second is not very usefull anyway.
> > > >
> > > > That depends entirely on what you want to do with it. Using
> > > > it as a reference for a time sync measurement, for example,
> > > > doesn't need time of day at all, and that's what keeps all
> > > > your telecom networks running.
> > >
> > > I understqnd why you want PPS data (telecom, etc) but why not let
> > > gpsd handle that for you?
> >
> > Handle what? A proprietary telecoms metric, that is
> > calculated on an FPGA? No...
>
> I am baffled how you can have a proprietary FPGA attached
> to /dev/ttyS0 ??

/dev/ttyS0 has nothing to do with it. The PPS goes straight 
into the FPGA, while NMEA continues to stream over the 
serial link.

I just wanted to make the point that PPS has a whole wide 
range of uses, and not all of them require time-of-day at 
all. Timing is distinct from time.

Though, to answer your next question, no I can't think of a 
use for PPS going into the software stack (and thus 
potentially into gpsd) that doesn't involve time-of-day.

Tom