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Merge pull request #330 from om26er/windows-support

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Enable Windows Support
This commit is contained in:
Patrick Kanzler
2019-06-04 23:04:09 +02:00
committed by GitHub
parent 19e3ec6895 adf85f7784
commit 40b30225d3
2 changed files with 17 additions and 11 deletions
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27
src/escpos/printer.py
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@@ -68,19 +68,24 @@ class Usb(Escpos):
self.idVendor = self.device.idVendor
self.idProduct = self.device.idProduct
check_driver = None
# pyusb has three backends: libusb0, libusb1 and openusb but
# only libusb1 backend implements the methods is_kernel_driver_active()
# and detach_kernel_driver().
# This helps enable this library to work on Windows.
if self.device.backend.__module__.endswith("libusb1"):
check_driver = None
try:
check_driver = self.device.is_kernel_driver_active(0)
except NotImplementedError:
pass
if check_driver is None or check_driver:
try:
self.device.detach_kernel_driver(0)
except usb.core.USBError as e:
if check_driver is not None:
print("Could not detatch kernel driver: {0}".format(str(e)))
check_driver = self.device.is_kernel_driver_active(0)
except NotImplementedError:
pass
if check_driver is None or check_driver:
try:
self.device.detach_kernel_driver(0)
except usb.core.USBError as e:
if check_driver is not None:
print("Could not detatch kernel driver: {0}".format(str(e)))
try:
self.device.set_configuration()