Ali Asad wrote: > For example, you can connect a USB mouse (a HID device) without > requiring root access or forcing the user to use udev rules. > > How are user mode applications able to talk to such HID devices? > Is that through some generic/universal HID device driver supported > by the Linux kernal (say uhid)?
Correct. (Though I think uhid is BSD only.) > If so how do user applications use this universal HID driver? Via the Linux input layer. For keyboards that maps to stdin. > This technique would be orthogonal to the approach of using libhid > to create our own device driver, but I want to explore all options. Then you could also look into hiddev and/or hidraw. They can be used to communicate with HID devices at a higher level than USB. CONFIG_HID_DEV /usr/src/linux/Documentation/usb/hiddev.txt CONFIG_HIDRAW http://cateee.net/lkddb/web-lkddb/HIDRAW.html (brief) hiddev may come with restrictions on which non-HID-class things your device can do however - but still worth looking into. //Peter _______________________________________________ libhid-discuss mailing list [email protected] http://lists.alioth.debian.org/mailman/listinfo/libhid-discuss http://libhid.alioth.debian.org/
