On Tue, Aug 13, 2013 at 6:15 PM, Jan Becvar <j...@groget.org> wrote: > On 13-Aug-13 11:36, Xiaofan Chen wrote: >> As replied by Tim in that thread, each interface of a USB composite >> device is a separated one. If you only installed the supported driver for >> the first interface, (Interface 0), then you can only claim interface 0 >> with libusbx, not the other two interfaces with unsupported driver. > > Thanks for the answer, although I'm still confused. Can you then give me > a hint, if there's a straightforward way how to install libusbx-friendly > driver to all the three interfaces covered by the IAD, e.g. using > Zadig/libwdi, while keeping usbccgp.sys for the composite parent?
Now it seems to me currently it is not possible using Zadig/libwdi to achieve this. > Brief comparison with libusb-win32 seems to indicate that this lib has > no problem with such setup (usbccgp.sys on parent, libusb0.sys on IF 0), > but of course there the enumeration process is completely different. Could you please share more details about this? Supposedly libusb-win32 may have the same issue as well. > Finally, during my earlier experiments, I tried a trivial > "hack"-modification of libusbx, assigning the same backend (subAPI) to > the associated interfaces as to the first one - and after this > modification everything "just worked", therefore I was hoping there > would be a solution. However, due to my lack of knowledge of libusbx > internals, I'm of course not sure if such approach might have some > unexpected side effects. Could you post your hack? If there is a solution inside libwdi/Zadig, I would prefer to sort the issue there. -- Xiaofan ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
