On Wednesday, August 29, 2012 2:45:17 AM UTC-4, Tim Roberts wrote: > Which operating system are you using? If you are on Windows, then the > > operating system has already loaded a printer driver for this device. > > > The libusb or libusbx libraries can be used to talk to USB devices. There > > is a Python binding. On Windows, you still need to have a driver, but the > > libusbx instructions can help you find an install one. >
I am on Windows and have installed a driver using libusb-win32. Using http://pyusb.sourceforge.net/docs/1.0/tutorial.html as a template, this is my code so far: import usb.core import usb.util dev = usb.core.find(idVendor=0x0922, idProduct=0x0021) # set the active configuration. With no arguments, the first # configuration will be the active one dev.set_configuration() # get an endpoint instance cfg = dev.get_active_configuration() interface_number = cfg[(0,0)].bInterfaceNumber alternate_settting = usb.control.get_interface(dev,interface_number) intf = usb.util.find_descriptor( cfg, bInterfaceNumber = interface_number, bAlternateSetting = 0 ) ep = usb.util.find_descriptor( intf, # match the first OUT endpoint custom_match = \ lambda e: \ usb.util.endpoint_direction(e.bEndpointAddress) == \ usb.util.ENDPOINT_OUT ) assert ep is not None I had to manually set bAlternateSetting to 0 for it to run and add dev to usb.control.get_interface(dev,interface_number). Trying to do the status thing mentioned before, in the interpreter I did: >>> ep.write('A') 2 And the manual says 2 is not a valid option... So something isn't adding up. -- http://mail.python.org/mailman/listinfo/python-list
