I just discovered PyUSB today and have been trying to get it installed and working on Win7-64bit. I did the PyUSB download from here: http://sourceforge.net/projects/pyusb/files/PyUSB%201.0/1.0.0-alpha-2/ Unziped the file and ran:
- python setup.py install I then went here: http://sourceforge.net/apps/trac/libusb-win32/wiki and followed the somewhat vague instructions to download libusb-win32. Guessing from these vague instructions, I found libusb-win32-bin-1.2.6.0\bin\amd64\install-filter-win.exe in the downloaded tree of files and ran it. I selected my USB device I want to talk to with PyUSB from the list it presented and installed this filter. It reported [cid:image001.png@01CD4AFD.4EB49050] I then rebooted my PC, as recommended. Then, following the steps in this tutorial: http://pyusb.sourceforge.net/docs/1.0/tutorial.html I opened an interactive Python window and did the following: PythonWin 2.6.4 (r264:75706, Jan 22 2010, 16:41:54) [MSC v.1500 32 bit (Intel)] on win32. Portions Copyright 1994-2008 Mark Hammond - see 'Help/About PythonWin' for further copyright information. >>> import usb.core >>> dev = usb.core.find() Traceback (most recent call last): File "<interactive input>", line 1, in <module> File "C:\Python26\lib\site-packages\usb\core.py", line 846, in find raise ValueError('No backend available') ValueError: No backend available So for some reason I'm guessing that PyUSB is not finding the installed libusb-win32 "filter". What should I do now? Have I missed a step? Have I not installed all the right pieces? The reason I picked libusb-win32, rather than http://www.libusb.org/wiki/libusb-1.0 is that I really don't want to have to build a Windows library from sources. There are NO instructions about how to do this and I don't want to just guess on my own. Is there somewhere to get a binary distribution of libusb-1.0 for Win7-64bit? Any help to get this working would be greatly appreciated! Thanks, Martin
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