On Mon, May 11, 2009 at 6:01 PM, Glen Harris <ghng2...@middlegable.org> wrote: > Hi there, > > Hoping for a hint in the right direction. I have the following situation: > > 1) Third party USB HID device with 1 interrupt IN and 1 interrupt OUT > endpoints. Unknown quality of firmware. > 2) Linux Ubuntu 8.10 kernel 2.6.27-11 > 3) usbhid has been told to ignore the device via quirks, and this has been > confirmed via checking /sys > 4) usbmon and Ellisys USB Tracker 110 for bus monitoring > 5) Using javax.usb.ri.linux 1.0.2 > > The problem: > I can get valid communication to my device, however in both usbmon and USB > Tracker traces I see a SetInterface command on the bus *when my program > finishes*. And I have no idea where it is coming from.
It probably is coming from the kernel code. > > I have grepped the source (jni and java) > I have single stepped the code > I am out of ideas. > > More than happy to provide debug logging output, but mainly just looking for > a hint of where to look, or what might be triggering this. Other > information: > > 1) Why is this a problem? After the 'SetInterface' I lose communication, > and my working theory is that the SetInterface resets the toggle, so when I > try to send the next DATA1 packet the device is expecting a DATA0 and > ignores it. The USB Tracker logs support this theory, and if I have sent an > even number of packets before the 'SetInterface' the next run of the program > works fine. It's possible, there was also some fixes done in this area in the 2.6.28-29 timeframe, so you might want to test on a 2.6.29 kernel to see if it works. If so, then you should be fine in later kernels. > 2) It is only when the application finishes that I see the SetInterface > command, I have tried manually closing everything and then triggering gc, > but I cant see it until the program finishes. If the kernel is issuing the set-interface (which I highly suspect it is) then you would never be able to see it just by debugging the app. > 3) When I say program, I am running via test cases in Eclipse. > > Thanks for any thoughts, > > Glen. > > > ------------------------------------------------------------------------------ > The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your > production scanning environment may not be a perfect world - but thanks to > Kodak, there's a perfect scanner to get the job done! With the NEW KODAK > i700 > Series Scanner you'll get full speed at 300 dpi even with all image > processing features enabled. http://p.sf.net/sfu/kodak-com > _______________________________________________ > javax-usb-devel mailing list > javax-usb-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/javax-usb-devel > > ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ javax-usb-devel mailing list javax-usb-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/javax-usb-devel
