How can I remove this error in the below mentioned program? The error iI'm getting is
ImportError: No module named usb.core
and my code is:
import usb.core
import usb.util
# find our device
dev = usb.core.find(idVendor=0xfffe, idProduct=0x0001)
# was it found?
if dev is None:
raise ValueError('Device not found')
# 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()
intf = cfg[(0,0)]
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
# write the data
ep.write('test')
Answer
OS is windows 8 64-bit [...] ValueError: No backend available
Allow me to translate: You forgot to install the correct USB driver.
USB devices need a driver to work in Windows. Look at PyUSB website for details, and use Zadig to generate and install the driver (e.g. LibUSB-Win32) for you. This program takes care of the certificate that Windows 8 wants to see for your drivers inf file.
Btw: The VID you should use for USB development is 0x4242.