Date: Tue, 30 Oct 2012 20:22:47 +0900 (JST) From: SAITOU Toshihide <toshi@ruby.ocn.ne.jp> To: freebsd-usb@freebsd.org Subject: Re: isochronous transfer for UVC camera Message-ID: <20121030.202247.226801724.toshi@ruby.ocn.ne.jp> In-Reply-To: <20121030.000648.193690728.toshi@ruby.ocn.ne.jp> References: <20121029.215434.122618874.toshi@ruby.ocn.ne.jp> <201210291436.08940.hselasky@c2i.net> <20121030.000648.193690728.toshi@ruby.ocn.ne.jp>
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In message: <20121030.000648.193690728.toshi@ruby.ocn.ne.jp>
SAITOU Toshihide <toshi@ruby.ocn.ne.jp> writes:
> In message: <201210291436.08940.hselasky@c2i.net>
> Hans Petter Selasky <hselasky@c2i.net> writes:
>> On Monday 29 October 2012 13:54:34 SAITOU Toshihide wrote:
>>> #define PKT_LEN 0x1400
>>
>> 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.
>
> Thank you for your quick response.
>
> I can't use the FreeBSD now so I will try this tomorrow. But Mac OS X 10.6.8 with libus 1.0.9, callback is not invoked too with some combination of the value below:
>
> #define PKT_LEN 0x400
> #define PKTS_PER_XFER 8
It dose not affect on the FreeBSD.
>> Also there is usbdump -i usbusX -f Y -s 65536 -vvv, which will show the actual
>> traffic.
! This is very useful.
$ usbdump -i usbus2 -f 4.0 -s 65536 -vvv (unit 4)
$ usbdump -i usbus2 -f 4.130 -s 65536 -vvv (unit 4, endpoint 0x82)
I have compared with other application (pwcview).
There are a lot of VS_PROBE_CONTROL transfer than expected. But it may
not be a problem because I have tried these transfer reproduced from
dump data. The problem I noticed is that the libusb_claim_interface of
my code is not logged. Is this function really implemented?
libusb_set_interface_alt_setting(handle, 1, 1);
libusb_control_transfer(handle, 0x01, 0x0b, 0x0100, 0x0100, NULL, 0, TIMEOUT);
Thank you.
---
SAITOU Toshihide
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