[LinuxPPS] NMEA

[Don Weeks]

And not use gpsd for NMEA? To me, gpsd is the logical choice and works with
a wide variety of GPS models. This is the way I use my GPS. gpsd through the
shared memory driver + Atom. If only I had a better source of interrupts
(since I am embedded). I use gpio which unfortunately is directed through a
cpld and the cpld inverts the signal. Fun stuff but I got it working.
     Don

On Wed, May 12, 2010 at 7:50 AM, Paul <paul at lavender-fam.net> wrote:

> I am currently developing a new server which (hopefully) will use NMEA
> and PPS. I have already started a thread about NMEA in the current NTP
> code, on which I will report my findings, but this slightly different so
> I've started a new thread.
>
> I previously tried using the NMEA output from a Jupiter module - this
> currently provides PPS using the Atom driver in NTP.
> At the time I posted about problems using this module - they skip whole
> seconds sporadically. This brought the usual assert/clear comments
> (irrelevant -this a whole second problem) and using fudge to shift
> seconds (great if it was consistent - but it isn't). Early versions of
> this module used a different protocol and there is an NTP driver - with
> warnings about this problem (Go read, but they don't make it clear how
> serious it is). I'd like to see something in the Wiki warning against
> using these modules to do anything other than provide a PPS signal.
> For me the way forward is to grit my teeth and pay for a Garmin.
>
>
>
>
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