Re: [gpsd-dev] Getting the driver-switching logic right

[Eric S. Raymond]

Andy Walls <address@hidden>:
> > 1. When you see a unique packet type for a driver with control
> >    capabilities, switch to that driver.  Covers EverMore binary, Garmin
> >    serial binary, Geostar binary, oncore binary, Navcom binary, SiRF
> >    binary, SuperStar II binary, Trimble TSIP binary, uBlox UBX binary,
> >    and Zodiac binary.
> 
> Does that include MT-3301 and other enhanced NMEA devices?  I'm not sure
> what you mean when you say "control capabilities.

Speed switching, mode switching, sample-rate switching.

It includes the MT-3301, because the MT-3301 has a rate-switching control.
 
> Ignoring my hacks to make the MT-3301 driver suitable for my MT-3329
> device, the 'event_triggermatch' change is needed to switch drivers to
> the MT-3301 driver, since Generic-NMEA gets 'event_identified' first and
> the MT-3301 driver never gets activated otherwise.

Ouch.  That's a bug.  I think I know what causes it.  I'll look into it.
-- 
                <a href="http://www.catb.org/~esr/";>Eric S. Raymond</a>