Date: Sun, 8 Jun 2008 23:10:55 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: Chuck Robey <chuckr@telenix.org> Cc: markus@freebsd.org, FreeBSD USB List <FreeBSD-usb@freebsd.org> Subject: Re: final usb question Message-ID: <200806082310.56920.hselasky@c2i.net> In-Reply-To: <484C46D6.6050908@telenix.org> References: <484BEE1C.8040903@telenix.org> <200806082132.51357.hselasky@c2i.net> <484C46D6.6050908@telenix.org>
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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
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