On Fri, Aug 19, 2016 at 11:15 AM, Hermann Hamann wrote: > Hi, Tormod > > This is the crashdump : > > > C:\Portable\wdso>python wdso.py > > wdso 0.9.8 > found productId 0x0834 > [Errno 5] Input/output error > Process USB_server: > Traceback (most recent call last): > File "C:\Python27\lib\multiprocessing\process.py", line 258, in _bootstrap > self.run() > File "C:\Python27\lib\multiprocessing\process.py", line 114, in run > self._target(*self._args, **self._kwargs) > File "C:\Portable\wdso\wdso.py", line 5019, in createUSBProcess > USBProcess = USB(USBQ,ScopeQ,DiagQ,PID,BUS,DEV) > File "C:\Portable\wdso\wdso.py", line 3563, in __init__ > self.device_init() > File "C:\Portable\wdso\wdso.py", line 3631, in device_init > self.device.ctrl_transfer(0x42,0xb1,0xdc,0,None); sleep(0.02) > File "C:\Python27\lib\site-packages\usb\core.py", line 1043, inctrl_transfer > self.__get_timeout(timeout)) > File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 883,in > <hermann-ham...@web.de> > ctrl_transfer timeout)) > File "C:\Python27\lib\site-packages\usb\backend\libusb1.py", line 595, > in _check > raise USBError(_strerror(ret), ret, _libusb_errno[ret]) > USBError: [Errno 5] Input/output error > finished >
The interesting parts are probably in libusb and not in pyusb. You can run with the LIBUSB_DEBUG environment variable set to a number to get more info, e.g.: LIBUSB_DEBUG=4 You can also set these from within python, like in the example of PYUSB_DEBUG here: os.environ['PYUSB_DEBUG'] = 'debug' Now when it comes to the libusb <-> kernel hardware driver interaction on Windows, it is not easy to get the full overview of possibilities, requirements and failure modes. Quoting from https://github.com/libusb/libusb/wiki/Windows : "libusb0.sys access is done through the libusbK DLL, therefore, if you plan to use the libusb-win32/libusb0.sys driver in libusb, you must have that library installed. If using a recent version of Zadig, you should not have to do anything, at it will install the library for you." Whether this was always (or still!) true I am not sure. Tormod ------------------------------------------------------------------------------ _______________________________________________ pyusb-users mailing list pyusb-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pyusb-users
