[libhid-discuss] retrieving large HID descriptor bytes

Charles Lepple clepple at ghz.cc
Wed Jun 16 01:14:34 UTC 2010


On Jun 15, 2010, at 1:34 PM, stone mike wrote:

> But on ubuntu 9.04 the libhid test got a very large descriptor bytes.

Does your device respond to both Method 1 and Method 2 described here?

http://trac.networkupstools.org/projects/nut/browser/trunk/drivers/libusb.c#L242

As mentioned there, lsusb uses the second method - although you may  
want to re-run lsusb, because it chopped off the interesting part:

[...]
>         HID Device Descriptor:
>           bLength                 9
>           bDescriptorType        33
>           bcdHID               1.10
>           bCountryCode            0 Not supported
>           bNumDescriptors         1
>           bDescriptorType        34 Report
>           wDescriptorLength      28
>          Report Descriptors:
>            ** UNAVAILABLE **

-- 
Charles Lepple



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