On Sat, Jan 21, 2012 at 7:37 AM, Xiaofan Chen <xiaof...@gmail.com> wrote:
> On Sat, Jan 21, 2012 at 9:17 PM, Peter Bigot
> <pabi...@users.sourceforge.net> wrote:
>> On Sat, Jan 21, 2012 at 6:50 AM, Xiaofan Chen <xiaof...@gmail.com> wrote:
>>> On Sat, Jan 21, 2012 at 2:33 AM, Peter Bigot
>>> <pabi...@users.sourceforge.net> wrote:
>>>>> Could you please post your full test codes?
>>>>
>>>> The only thing above that was "import usb".  That code does assume
>>>> that the backend is libusb01; if the error you're getting is:
>>>>
>>>> AttributeError: '_Device' object has no attribute 'bus'
>>>>
>>>> perhaps you're using libusb10 even if you think you aren't.  Try the
>>>> following version
>>>
>>> Thanks. The code now works for me under Ubuntu 11.04.
>>>
>>>> import usb
>>>> import usb.backend.libusb01
>>>>
>>>> for d in usb.core.find(find_all=True,
>>>> backend=usb.backend.libusb01.get_backend()):
>>>>    dev = d._ctx.dev
>>>>    print type(dev)
>>>>    print '%s: %u:%u or %s:%u' % (d, d.bus, d.address,
>>>> dev.bus[0].dirname, dev.devnum)
>>>>
>>>> When I do that, it appears the patch is correct even with libusb01 compat.
>>>>
>>>
>>> This is what I get under Ubuntu 11.04 which uses libusb-0.1 legacy,
>>> without your patch.
>>>
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe7cc>: 5:2 or 005:2
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe84c>: 5:1 or 005:1
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe8ac>: 4:2 or 004:2
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe8ec>: 4:1 or 004:1
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe92c>: 3:3 or 003:3
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe96c>: 3:2 or 003:2
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe9ac>: 3:1 or 003:1
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fe9ec>: 2:2 or 002:2
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fea2c>: 2:1 or 002:1
>>> <class 'usb.backend.libusb01._usb_device'>
>>> <usb.core.Device object at 0x85fea6c>: 1:1 or 001:1
>>>
>>> Does this mean that your patch is not necessary, at
>>> least for Ubuntu 11.04 version of libusb-0.1?
>>
>> Yes.  It also means the patch will work on both Ubuntu 11.04 and SUSE
>> 10.3, so there's no reason not to apply it.  Thanks for confirming
>> this.
>
> I see. So under Suse 10.3, you see different results of
>  d.bus and dev.bus[0].dirname without your patch, right?

Yes.  d.bus is always zero on openSUSE 10.3, because
dev.bus[0].location is always zero.

> In my case, the values are the same. So it will still match
> with your patch.

Yes.

>
> On the other hand, the code does not print out anything
> under my Mac Mini which runs Mac OS X Lion, but that is
> probably a separate issue.

Yes.

Peter

>
> --
> Xiaofan
>
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