On Tue, Aug 28, 2012 at 9:08 AM, Xiaofan Chen <xiaof...@gmail.com> wrote: > On Mon, Aug 27, 2012 at 7:38 PM, Kustaa Nyholm > <kustaa.nyh...@planmeca.com> wrote: >> Hi List, >> >> this is not (yet!) an libusbx question directly but since HID has been >> introduced back to libusbx I hope some people who know the nitty gritty >> details will hang around here and might give a hint or two. > > Take note there is no HID backend for libusbx yet.
I meant to say "Take note there is no Mac OS X HID backend for libusbx yet". BTW, Nathan is opposed to the Mac OS X HID idea and he is now not willing to contribute to libusbx partially because of the reason. http://libusb.6.n5.nabble.com/mac-performance-unsuspending-tt5710394.html#a5710457 Nathan wrote:"I will not put any fixes into libusbx. I don't like the direction that project is taking (HID support == bad idea) or the fragmentation having a second projects creates." >> we are working with a USB UVC camera that also represents itself as a HID >> device so that some aspects of the camera can be controlled with output >> reports. >> >> To access the HID part we use signal11 HIDAPI library and it works without >> any issues on Windows. However, on Mac we sometimes (quite often actually) >> get error e000404f / -536854449 (from IOHIDDeviceSetReport()) >> when we try to do hid_write(). >> >> Googling around I see that this may have something to do with the device >> not responding or stalling. > > To confirm that, maybe you can use a HW USB bus analyzer to check. > >> As it is unlikely that we can influence the firmware in a timely manner is >> there anything we can try to do to work around the problem? >> -- Xiaofan ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ libusbx-devel mailing list libusbx-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libusbx-devel
