Date: Mon, 29 Oct 2012 14:36:08 +0100 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-usb@freebsd.org Subject: Re: isochronous transfer for UVC camera Message-ID: <201210291436.08940.hselasky@c2i.net> In-Reply-To: <20121029.215434.122618874.toshi@ruby.ocn.ne.jp> References: <20121029.215434.122618874.toshi@ruby.ocn.ne.jp>
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On Monday 29 October 2012 13:54:34 SAITOU Toshihide wrote: > #define PKT_LEN 0x1400 Hi, The packet length is not this value I think. The 0x1000 is part of the packet multiplier for High-Speed USB's wMaxPacketSize. It is (1+2) * 0x400. Try that and see what happens. Also there is usbdump -i usbusX -f Y -s 65536 -vvv, which will show the actual traffic. --HPS
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