On Sat, Sep 21, 2013 at 7:21 AM, Kano <libu...@iporg.org> wrote:
> Hi,
> I've been using usb for about a year on many devices but only using a
> single interface.
> Finally got some hardware that has 2 interfaces and the code I've written
> works on linux but fails on windows.
> Anyone know if there are special rules required for windows?
>
> Of course I'm using Zadig to set the windows driver to WinUSB.
> The first interface open is of course working.
>
> The code is basically:
> For a single interface chip (that always works on many linux/windows) it is:
> libusb_get_device_list
> libusb_get_device_descriptor
> libusb_open
> libusb_claim_interface 0
>
> Instead for a chip with multiple interfaces I am:
> libusb_get_device_list
> libusb_get_device_descriptor
> libusb_open
> libusb_claim_interface 0
> libusb_get_device(interface 0 handle)
Why?
> libusb_open
Why?
What if you remove the above two?
> (libusb_claim_interface 1) <- never gets here
>
> This works on linux but fails on windows on the 2nd open (before claiming
> the 2nd interface) with:
> [ 1.209821] [00000f94] libusbx: debug [libusb_open] open 2.2
> [ 1.209821] [00000f94] libusbx: error [winusbx_open] could not open device
> \\.\USB#VID_0403&PID_8350&MI_00#6&2CE4DD9F&0&0000#{C8D1AB34-4B5C-488A-8194-08C26C1A05DA}
> (interface 0): [5] Access is denied.
>
> The code is in a github git and the pull request that has the changes for
> multiple interfaces is:
> https://github.com/ckolivas/cgminer/pull/492/
>
> I've tried this with libusbx-1.0.17.tar.bz2
> (and also with libusb-1.0.16-rc10.tar.bz2 that is in that git)
> Both give the same open fail - working on linux but failing on windows
>
> A full log up to the failures (at the bottom) can be seen here:
> pastebin.com/Rx9jmMnU
>
--
Xiaofan
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