2011/8/16 Stenquist, Carl <carl.stenqu...@renesas.com>:
> Hi
>
>
>
> I cannot get any connected devices (except a libusb device) to reply to
>
>    usb.core.find()
>
>
>
> If I use a known device like
>
>    usb.core.find(idVendor=0x1679, idProduct=0x2001) # Beagle
>
>    usb.core.find(idVendor=0x0878, idProduct=0x1101) # Systec CAN
>
>    usb.core.find(idVendor=0x0123, idProduct=0x4567)
>
>    usb.core.find(find_all=True, bDeviceClass=0x02) # PCDC demo
>
>
>
> I just get empty lists. Like when I run above I get:
>
>
>
> __main__ start
>
> usb.core.find(find_all=True)
>
> No handlers could be found for logger "usb.backend.libusb10"
>
> []
>
> usb.core.find(idVendor=0x1679, idProduct=0x2001)
>
> None
>
> usb.core.find(idVendor=0x0878, idProduct=0x1101)
>
> None
>
> usb.core.find(idVendor=0x0123, idProduct=0x4567)
>
> []
>
> usb.core.find(bDeviceClass=0x02)
>
> []
>
> usb.core.find(idVendor=0x0, idProduct=0x0)
>
> []
>
>
>
> As you can see; just empty lists ‘[]’ or ‘None’. The devices are connected
> to the PC, because I can see them in the Windows XP Device Mgr.
>
>
>
> What is the “No handlers could be found for logger "usb.backend.libusb10" In
> the output above?
>
>
>
> Thankful for any help!
>

It feels like you didn't install your devices with WinUSB. Please,
check libusb 1.0 windows backend docs for details:
http://www.libusb.org/wiki/windows_backend


-- 
Best Regards,
Wander Lairson Costa

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