On Thu, Oct 6, 2011 at 1:37 PM, Alexander Eisenhuth wrote:
>> Please, check your descriptors. If you are in Linux, please post the
>> output of lsusb -vv for you device, or, if you are in Windows, check
>> the ouput of test-libusb-win32 app.
>
> Ok what I see that there exist no endpoint. Does that make sense? How
> does the communication work in that case?

There is always the endpoint zero, the control endpoint.

>     Interface Descriptor:
>       bLength                 9
>       bDescriptorType         4
>       bInterfaceNumber        0
>       bAlternateSetting       0
>       bNumEndpoints           0

The bNumEndpoints does not count the control endpoint, but gives the
number of endpoint descriptors belonging to this interface, and the
control endpoint does not have any descriptor.

Cheers,
Tormod

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