Re: [gpsd-users] gpsd:WARN: PPS TIOCMIWAIT returns unchanged state, ppsmonitor sleeps 10

[Gary E. Miller]

Yo folkert!

On Tue, 2 Jul 2013 20:20:29 +0200
folkert <address@hidden> wrote:

> Ok I added an extra serial card but that did not help.

Too bad, but not unexpected.  One 16550A clone is much like another.

> gpsd:INFO: KPPS cycle:  999928, duration:  779940 @
> 1372789172.778096721 gpsd:PROG: KPPS assert 1372789172.778096721,
> sequence: 4 - clear  1372789172.998064460, sequence: 5 gpsd:PROG:
> KPPS data: using clear gpsd:INFO: KPPS cycle:  999908, duration:
> 219967 @ 1372789172.998064460 gpsd:PROG: KPPS assert
[...]

That actually looks pretty good, most of the time.  Then it just seems
to miss some pulses.

> What I don't understand: what does it need TIOCMIWAIT for? It already
> has the assert/clears?

Looks to me like it is missing a pulse now and then.  Can you confirm
your GPS is outputting true RS-232 levels?  That is plus and minus 12
Volts.  Could also be a problem with interrupts on your motherboard.

RGDS
GARY
---------------------------------------------------------------------------
Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97701
        address@hidden  Tel:+1(541)382-8588

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