final usb question

[Hans Petter Selasky]

On Sunday 08 June 2008, Chuck Robey wrote:
> Hans Petter Selasky wrote:
> > Hi Chuck,
> >
> > On Sunday 08 June 2008, Chuck Robey wrote:
> >> Hans, this is the big question, requires more thought, so if you don't
> >> have enough time on hand, give this a skip for a while.  I'm CC'ing this
> >> to the FreeBSD-USB list, it's conceivable that I might get lucky there,
> >> too.
> >>
> >> This replaces my last usb question, because (even though I think the
> >> answer to that one confirms the utter insanity of the people who wrote
> >> the USB-HID spec), I have absolute confirmation of the fact that I
> >> cannot, in situations where the report descriptor has multiple sections
> >> ID'd by multiple report IDs, force the USB peripheral to send me the
> >> report ID that makes the best sense, and I must be satisfied with
> >> whatever the device sends me.  That's ridiculous, but I wrote down the
> >> reference, just so I could look back at it and confirm to myself that I
> >> wasn't dreaming any of this.
> >>
> >> As a better illustration of that, my tablet has report IDs 7, 8, and 9.
> >> ID# 7 is the only one that matches well, but the device manufacturer has
> >> set it up to respond ONLY with report ID# 9.  If I _could_ change that,
> >> I surely would, and I spent a LOT of time investigating until I
> >> absolutely found hard confirmation of the fact that I can't.  If you get
> >> lucky and have a mfr sending all of the report ID's, you then can toss
> >> out the ones you don't like, but if they only send one (as in my case),
> >> well, you're screwed.  What a stupid spec!
> >
> > You mean if you can set another USB configuration ?
>
> That's what I'm saying SHOULD be possible, but it isn't.

There will soon be a utility that can do this, so that you can run:

usbconfig -u ugen0 -c 1

for example to select configuration index 1 for your device. Please note that 
there will be one ugen device for every USB device present in the future! And 
I'm in the future :-)

--HPS