Talking to a GPS unit over USB

[Trevor DeVore]

On Apr 10, 2004, at 6:43 PM, Dar Scott wrote:
>> Rats, it looks like it isn't going to work .  driverNames() returns 
>> empty.  There is a serial connection cable that I can get for it.  I 
>> have a Keyspan serial->USB converter so I think I will pick that up 
>> and give it a try.
>
> Rats.  I am surprised; the GPS protocols are based on a family of 
> navigation standards that specifies serial.
>
> Here is an alternative to driverNames() that might come up with a 
> different answer.  (I only know of driverNames() missing the built-in 
> modem; if you see anything else in deviceNames() and not in 
> driverNames(), please let me know.)
>
> ...

Thanks for passing along the function Dar.  That showed the modem but 
not the GPS device.  I went through the connection settings on my 
Garmin GPS unit and it looks as if the USB connection uses a 
proprietary Garmin protocol.  I can select from multiple protocols with 
a serial connection (I just don't have a serial connector yet) so I 
will give that a try when I can get a hold of a serial cable for it.

-- 
Trevor DeVore
Blue Mango Multimedia
trevor at mangomultimedia.com