On Tuesday 06 January 2004 07:13am, [EMAIL PROTECTED] wrote:
> Hello USB-friends,
> my knoppix installation works fine on my VAIO notebook PCG-SR31K.
> The wireless network, the usb-hub, the usb-keyboard, the usb-mouse, the
> usb-hotsync without any problem after some customizations, but one
> component will not work.
> I have an USB-RS232 Interface Converter to get a serial interface.
> I want to communicate with my GARMIN etrex VENTURE GPS with this
> interface.
> The software GPS-Drive works fine with the protocol NMEA In / NMEA Out.
> I am not be able to use the protocol GARMIN to get or set any route, track
> or waypoint.
> The gpstrans returns the following error message:
> Connected GPS [/dev/ttyUSB0] is: <GPS not responding>
> gpspoint and gpsman returns nothing.
> The output from lsusb:
> Bus 001 Device 001: ID 0000:0000
> Bus 001 Device 002: ID 05e3:0604 Genesys Logic, Inc.
> Bus 001 Device 004: ID 0711:0230 Magic Control Technology Corp. MCT-232
> Serial Port
> Bus 001 Device 005: ID 046d:c00f Logitech, Inc.
> Bus 001 Device 006: ID 046d:c30a Logitech, Inc.
> Bus 001 Device 003: ID 04cc:1122 Philips Semiconductors Hub
> Bus 001 Device 007: ID 054c:0056 Sony Corp.
> The device /dev/ttyUSB0 have to be correct, because the protocol NMEA In /
> NMEA Out works with this.
> The model of the USB-RS232 Interface Converter is U232-P9.
> The protocol worked under w2k with FUGAWI and some other applications.
> setserial will not work with USB serial interfaces.
> setserial /dev/usb/ttyUSB0 will return the message Cannot get serial info:
> Invalid argument.
> I will be happy for any idea to get my GPS running with knoppix.
> Thanx,
> mgsimon

Hello 'mgsimon',

(Sorry for the delayed reply... I'm a bit behind on my email!)

Although I cannot be certain, since your problem is somewhat different than 
mine, I think you may be seeing different symptoms of the same 
"disease" (bug) that I found and fixed in the MCT-U232 driver.

I recently provided a patch to the MCT-U232 kernel module which fixed a 
problem that prevented writes to my Garmin GPS35 TracPak GPS receiver from 
being seen by the GPS using the Belkin F5U109 USB/RS-232 converter (which, 
like your adapter, uses the MCT-U232 kernel module). 

In my case, I was able to _receive_ NMEA data (my GPS only listens/talks in 
NMEA protocol) just fine from the GPS, but it would not "hear" any of my 
commands.

Since your software would have to send a command to the GPS to switch to/from 
NMEA/Garmin protocol, I suspect you're having the same core problem with the 
driver.

This patch has recently been picked up by the kernel maintainers and should 
therefore be in the next official kernel releases (2.4.25 and 2.6.1 IIRC).  
Or, if you can't wait that long and you're adept at compiling your own kernel 
modules, dig into the Linux-USB-Devel list archives for my patch source code:

   http://sourceforge.net/mailarchive/forum.php?forum=linux-usb-devel

Finally, be sure to let me (and the Linux-USB-Users list) know if you need any 
more assistance in this matter. Good luck!

Bill Marr



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