Re: [gpsd-dev] PPS not showing in gpsmon/gpsd on RPi 3

[Eric S. Raymond]

Gary E. Miller <address@hidden>:
> > For damn *sure* it could be clearer.  See my longer email about the
> > error log from the Pi 3.
> 
> Suggested wording welcome.

I can't suggest anything yet.  I don't undersand the code's failure modes
well enough.

> > A related question is why KPPS isn't working.
> 
> They both come down to the same thing, there is no conrtol input for
> PPS or KPPS to use.  PPS needs the input and TIOCMWAIT, and KPPS needs
> the input and the KPPS driver.

This is another of your explanations-that-leave-me-more-confused.

If that's so, why is the startup code referencing a nonexistent /dev/pps1
and throwing permission errors (of all things) on /dev/pps0?

It's obvious why the TIOCMIWAIT isn't working.  What's unobvious is why KPPS
isn't.  The ppstest result seems to tell us that the RFC2783 interface is
up.  My conclusion is that the GPSD code is failing to use it correctly
because of something specific to Pi3/Jessie.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>

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