Thank you for your fast response.
Before receiving your response, I had tried this:
I was working initially with Python 3.4.3 so I uninstalled it and installed
version 2.7.9.
Then the "No backend available" error disappeared.
I uninstalled Python 2.27.9 and came back to Python 3.4.3 and still no
error.
Puzzling!
But it seems that I can't access the list devices on the bus with the
following script:
import usb.core
import usb.util
list_dev = usb.core.find(find_all=True)
n = 0
for dev in list_dev:
n = n+1
print (n, " " , dev)
Could it be because I did not specified any filter or .INF file since I want
to scan the bus myself to connect to microcontrollers in a arbitrary number
and USB ready
Will this behavior also exists on my target operating system with will be
Linux running on à Raspberry PI.
Best regards
Michel Allaire
-----Message d'origine-----
De : Xiaofan Chen [mailto:xiaof...@gmail.com]
Envoyé : 2 mars 2015 08:06
À : pyusb-users@lists.sourceforge.net
Objet : Re: [pyusb-users] No backend available with windows 7
On Mon, Mar 2, 2015 at 1:06 PM, Michel Allaire <michel....@videotron.ca>
wrote:
> 2015-02-27 22:41:37,979 ERROR:usb.libloader:Libusb 0
> (C:\WinAVR-20100110\bin\libusb0.dll) could not be loaded
You probably want to delete this file and try again.
C:\WinAVR-20100110\bin\libusb0.dll
--
Xiaofan
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