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Tests: USBHID: Use libusb0 backend on Windows 

libusb0 supports all features used for testing. A newer version
(libusb1) does not have a complete implementation for Windows.
pull/11458/head
Filip Jagodzinski 2019-09-11 10:52:44 +02:00
parent db2995052f
commit 01e6bc5827
1 changed files with 11 additions and 1 deletions
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12
TESTS/host_tests/usb_device_hid.py
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@ -19,6 +19,7 @@ import functools
import time
import threading
import uuid
import sys
import mbed_host_tests
import usb.core
from usb.util import (
@ -31,6 +32,15 @@ from usb.util import (
DESC_TYPE_CONFIG,
build_request_type)
if sys.platform.startswith('win'):
# Use libusb0 on Windows. libusb1 implementation for Windows
# does not support all features necessary for testing.
import usb.backend.libusb0
USB_BACKEND = usb.backend.libusb0.get_backend()
else:
# Use a default backend on other platforms.
USB_BACKEND = None
try:
import hid
except ImportError:
@ -232,7 +242,7 @@ class USBHIDTest(mbed_host_tests.BaseHostTest):
during test suite setup.
Raises RuntimeError if the device is not found.
"""
usb_dev = usb.core.find(custom_match=lambda d: d.serial_number == usb_id_str)
usb_dev = usb.core.find(custom_match=lambda d: d.serial_number == usb_id_str, backend=USB_BACKEND)
if usb_dev is None:
err_msg = 'USB device (SN={}) not found.'
raise RuntimeError(err_msg.format(usb_id_str))