USB GPS by DeLorme

[Roger Oberholtzer]

Perhaps the unit is a Serial-over-USB device. Then a /dev/ttyUSBx entry
will be made that is accessed just like a serial port. I have a
converter cable that does this so I can hook up serial devices to a USB
connector. As always, there are device drivers involved. So, you would
need to install the appropriate driver. I use, for example, the pl2303
driver. When it is loaded the new /dev/ttyUSBX device is made. That is
on Gentoo with devfs. I then access the USB device as /dev/ttyUSBx

Should this be the case, check out:

	/usr/src/linux/Documentation/usb/usb-serial.txt


On Wed, 2004-01-21 at 02:57, Matthew Carpenter wrote:
> gpsdrive supports the DeLorme Earthmate, but has only confirmed it to work with the Serial version.  I'm attempting to provide a Serial interface to the unit.  I know the bit about watching /var/log/messages but was wondering if there was something in /proc which might be a more precise mechanism.  I wondered if someone out there who knows more about USB in linux than I do might answer.  I wondered if perhaps /dev/usb/??? or /dev/ttyUSB?? might be the default...  As it is the Earthmate shows up as a "hid" device and appears to be assigned to /dev/usb/hiddev0 but I've been thus far unable to access it there...
> 
> 
> On Tue, 20 Jan 2004 15:42:24 -0500
> Bruce Marshall <bmarsh at bmarsh.com> wrote:
> 
> > On Tuesday 20 January 2004 14:11, Matthew Carpenter wrote:
> > > How do I tell how to access a new USB device?
> > >
> > > I'm looking through Kinfocenter and wondering why they don't include that
> > > information in the USB section (like, device to access it.. a duh!) And I
> > > got to wondering how they'd implement that.  Does anyone have a superior
> > > understanding of USB and wish to take a stab at determining what device to
> > > access a USB device through?  For this example, use 2.4.21, or SuSE 9.0pro.
> > >
> > > The challenge is set.  Thanks
> > > Matt
> > >
> > > ps.  The need is to access a USB GPS from DeLorme, called the Earthmate.
> > 
> > Can I ask what you are going to use for software to deal with the Earthmate?
> > 
> > 
> > -- 
> > +----------------------------------------------------------------------------+
> > + Bruce S. Marshall  bmarsh at bmarsh.com  Bellaire, MI         01/20/04 15:42  +
> > +----------------------------------------------------------------------------+
> > "Nobody can be as agreeable as an uninvited guest."
> > 
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