Pyusb on Windows 7 cannot find any devices

Question

So I installed Pyusb 1.0.0-alpha-1
Under Windows, I cannot get any handles to usb devices.

>>> import usb.core
>>> print usb.core.find()
None

I do have 1 usb device plugged in(idVendor=0x04d8, idProduct=0x0042), and I tried usb.core.find(idVendor=0x04d8, idProduct=0x0042) but that failed too.

Under Ubuntu, with the same versions of pyusb and python (2.6), I am able to successfully find my device with that code, and communicate with it.

So how can I get pyusb to find usb devices on Windows 7?

Answer 1

See Turbo J's answer. To install the USB driver libusb for your device I found two options:

• Use libusb-win32's inf-wizard.exe to create the INF file and then use install-filter-win.exe to install libusb as driver for your device.

• Use zadig (simpler)

  • if no device is shown, Options > List All Devices
  • select libusb-win32 as driver to be installed