On Sat, 3 Dec 2005, Matthew Dharm wrote:

> On Sat, Dec 03, 2005 at 11:56:09AM -0500, Stephen Beaver wrote:
> > 
> > Thanks for your reply. If bInterfaceClass is supposed to be an 8 for this
> > type of device but all the ones I tried (each from a different manufacturer)
> > report a 0, perhaps the USB system is broken. I'll make the same tests on a
> > PC and see what I get.
> 
> There are two bInterfaceClass numbers to look at.  The per-device one for
> most (all?) storage devices is '0', which means look at the other one.

You're thinking of bDeviceClass, not bInterfaceClass.

> The other one is per-interface.  That one should be 8 for storage devices.
> 
> Matt

Alan Stern



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