Dave Mielke <[EMAIL PROTECTED]> writes: >>Yes, for now, thats all that is necessary. The Linux hiddev >>interface has a bunch of ioctls as well (all defined in linux/hiddev.h). >>They can be used to get "reports" and do other things, but >>reading incoming events is as simple as reading from the device. > > Do you know what writing to a hiddev is suposed to do?
No. I wasn't brave enough to try this yet, since the last display I had for driver hacking (the Trio) died when I wrote a slightly malformed packet to it... > Can you, for example, just write a regular byte stream to it? If so, > then I can tell you how to do a regular Alva write and we can see if > that works. If you tell me which stream, I can try. I havent groked the hiddev interface yet though... > Is /dev/usb/hiddev0 a device in its own right or is it a symlink to somewhere > else? Its a special device file. Quoting Documentation/usb/hiddev.txt from the linux kernel tree: "The hiddev interface is a char interface using the normal USB major, with the minor numbers starting at 96 and finishing at 111." udev automatically creates these device file if a HID compatible USB device gets connected. > If the device is found via searching usbfs, do you know how to then translate > that to the right hiddev device to open or can the usbfs device be opened and > read? hiddev and plain usb devices are on a different layer in the kernel. If we were to use usb devices directly, we would need to impelemtn HID ourselves... There is a libhid which can be used to do HID IO from userspace, but I tried it yesterday but it is buggy. It managed to find the correct device via vendor/product ID, but when trying to retrieve the HID descriptor it fails. This bug seems to be common, since I found some postings about it on the net. So for now, I think we are better of using the linux hiddev interface. >>Key group 1: The thumb keys. The device has 5 thumb keys, numbers 0 to 4 from >>left to right. > > All the same size and equally spaced? Not quite, but mostly. I have the device at home, can examine this in detail today evening. >>Key group 3: These keys are located below the display line, on >>top of the device. There are 8 of those keys, in the middle >>you have "cursor keys" with up/down, left/right, and one button >>in the middle. On the sides, you have two additional keys. >>Below are the keycodes drawn in the same layout: > > Are these keys below the routing keys or above them? Below. > Do there seem to be any limitations regarding which keys can be pressed > together? I havent tried any key combinations yet. -- CYa, ⡍⠁⠗⠊⠕ | Debian Developer <URL:http://debian.org/> .''`. | Get my public key via finger [EMAIL PROTECTED] : :' : | 1024D/7FC1A0854909BCCDBE6C102DDFFC022A6B113E44 `. `' `- <URL:http://delysid.org/> <URL:http://www.staff.tugraz.at/mlang/> _______________________________________________ This message was sent via the BRLTTY mailing list. To post a message, send an e-mail to: BRLTTY@mielke.cc For general information, go to: http://mielke.cc/mailman/listinfo/brltty
