Richard Zinn wrote:

> Has anyone interfaced a GPS receiver chip, like the Motorola M12+ Oncore
> receiver (http://www.synergy-gps.com/M12_Oncore_Timing.html)?  Or maybe a
> good website out there that describes how someone did it?  Seems like I've
> seen posts about this on this PIClist, but I couldn't find anything useful
> in the archive.  Maybe someone has an idea of another GPS receiver that
> would be good to try and use with a PIC.

TRIMBLE actually pioneered this business for the military, and their
receivers are truly the very best. Motorola is a newbie to this biz.

I'm interfacing the Trimble Lassen II which provides its data in TTL
RS232 (direct connection to PIC). The module is only 1.4"w x 3.2"l and
only 0.3" high, including the 8P header connector. Needs a 3V battery
backup to get oriented after shutdown, but I use a Lithium Vanadium
Pentoxide rechargeable, so it never needs to be replaced. I'd never use
anything else.

Checkout http://www.trimble.com/  .

--Bob
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                Bob Axtell
        PIC Hardware & Firmware Dev
          http://beam.to/baxtell
              1-520-219-2363

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