Hi all,
I am new to USB. Question may be stupid.
I do some test under linux to get the information from usb printer by send usb
request.
Someone told me that the deviceid contained the information I need, so I try to
get it by sending GET_DEVICE_ID request.
However, it need "Config index" in wValue and "Interface & Alternate Setting" in
wIndex.
To get them, I use GET_DESCRIPTOR request to get the device descriptor and
configuration descriptor, all got.
But to get the descriptor of interface, nothing returned. in another way, as Spec said
that while getting configuration, the interface will also return, but in my test, the
inteface's address is not able to visit.
Could anyone tell the way to get the device's interface?
Thanks in advance!
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