Hi, here a hint for reattaching the original driver to a specific interface, however it is a shell script - so just a hint...
http://pastebin.com/501gQbdz You would need to adjust the parameters at the beginning of the script. -Thomas Am Sonntag, den 12.12.2010, 01:35 +0100 schrieb Michael Strecke: > Am 24.11.2010 19:55, schrieb nick caruso: > > I'm trying to use pyusb-1.0 under Ubuntu 10.10. > > > > I've tried using the example that comes along with the source > > distribution but it doesn't work. > > In particular, running it as root, I get the error "USBError: Resource > > Busy". > > I think this is because the kernel has a driver on the device. > > > > I can fix this, but I'm wondering if there are any better examples out > > there that anyone can point me to? > > > Yes, you are correct. > > When I tried to read the data via USB from my GPS logger recently (via > itrackutil), I got the same message, but not only in Ubuntu 10.10, but > also in 10.04. > > The utility did work perfectly just a few days ago. > > I had to find out that the kernel module cdc_acm had claimed the device. > > When the GPS data logger was plugged in, the cdc_acm driver created a > device that allowed real-time access to the current GPS data. > > The more complicated "direct" communication performed by itrackutil to > access *stored* GPS data failed, because the device was already busy. > > After some google-ing, I solved the problem. > > The function you are looking for is "detachKernelDriver". It does, what > it says it does. > It will complain however if there is no kernel driver to detach, so you > have to catch the exception: > > ... determine device, interface, and configuration ... > > try: > handle = device.open() > handle.detachKernelDriver(interface) > except usb.USBError, err: > if str(err).find('could not detach kernel driver from interface') >= 0: > pass > else: > raise usb.USBError,err # any other USB error > > handle.setConfiguration(configuration) > > ... > > > I did not find anything to (re)attach the device later. Any hints? > > > Mike > > > ------------------------------------------------------------------------------ > Oracle to DB2 Conversion Guide: Learn learn about native support for PL/SQL, > new data types, scalar functions, improved concurrency, built-in packages, > OCI, SQL*Plus, data movement tools, best practices and more. > http://p.sf.net/sfu/oracle-sfdev2dev > _______________________________________________ > pyusb-users mailing list > pyusb-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/pyusb-users > ------------------------------------------------------------------------------ Oracle to DB2 Conversion Guide: Learn learn about native support for PL/SQL, new data types, scalar functions, improved concurrency, built-in packages, OCI, SQL*Plus, data movement tools, best practices and more. http://p.sf.net/sfu/oracle-sfdev2dev _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
