pyusb_device_discovery_configuration_and_endpoint_io.py

1import usb.core
2import usb.util
3
4# find our device
5dev = usb.core.find(idVendor=0xfffe, idProduct=0x0001)
6
7# was it found?
8if dev is None:
9    raise ValueError('Device not found')
10
11# set the active configuration. With no arguments, the first
12# configuration will be the active one
13dev.set_configuration()
14
15# get an endpoint instance
16cfg = dev.get_active_configuration()
17intf = cfg[(0,0)]
18
19out_ep = usb.util.find_descriptor(
20    intf,
21    # match the first OUT endpoint
22    custom_match = \
23    lambda e: \
24        usb.util.endpoint_direction(e.address) == \
25        usb.util.ENDPOINT_OUT
26)
27
28in_ep = usb.util.find_descriptor(
29    intf,
30    # match the first IN endpoint
31    custom_match = \
32    lambda e: \
33        usb.util.endpoint_direction(e.address) == \
34        usb.util.ENDPOINT_IN
35)
36
37assert out_ep is not None
38assert in_ep is not None
39
40# write the data
41out_ep.write('test')
42
43# read the response
44data = in_ep.read(len('test'))
45print(data)