USB GPS by DeLorme

[Matthew Carpenter]

Hi Roger-
do you actually modprobe the pl2303 in order for it to work?  Without 
the pl2303 does hid pick it up?  I'm a bit fuzzy over drivers "claiming" 
the device.  I'm wondering if hid recognizes the device for some STRANGE 
reason, and if so, how do we pre-empt it?  (btw- I'm using hotplug)

Thanks for the input!
Matt


Roger Oberholtzer wrote:

>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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>>>      
>>>
>
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