| |
| infrared remote control support in video4linux drivers |
| ====================================================== |
| |
| |
| basics |
| ------ |
| |
| Current versions use the linux input layer to support infrared |
| remote controls. I suggest to download my input layer tools |
| from http://bytesex.org/snapshot/input-<date>.tar.gz |
| |
| Modules you have to load: |
| |
| saa7134 statically built in, i.e. just the driver :) |
| bttv ir-kbd-gpio or ir-kbd-i2c depending on your |
| card. |
| |
| ir-kbd-gpio and ir-kbd-i2c don't support all cards lirc supports |
| (yet), mainly for the reason that the code of lirc_i2c and lirc_gpio |
| was very confusing and I decided to basically start over from scratch. |
| Feel free to contact me in case of trouble. Note that the ir-kbd-* |
| modules work on 2.6.x kernels only through ... |
| |
| |
| how it works |
| ------------ |
| |
| The modules register the remote as keyboard within the linux input |
| layer, i.e. you'll see the keys of the remote as normal key strokes |
| (if CONFIG_INPUT_KEYBOARD is enabled). |
| |
| Using the event devices (CONFIG_INPUT_EVDEV) it is possible for |
| applications to access the remote via /dev/input/event<n> devices. |
| You might have to create the special files using "/sbin/MAKEDEV |
| input". The input layer tools mentioned above use the event device. |
| |
| The input layer tools are nice for trouble shooting, i.e. to check |
| whenever the input device is really present, which of the devices it |
| is, check whenever pressing keys on the remote actually generates |
| events and the like. You can also use the kbd utility to change the |
| keymaps (2.6.x kernels only through). |
| |
| |
| using with lircd |
| ================ |
| |
| The cvs version of the lircd daemon supports reading events from the |
| linux input layer (via event device). The input layer tools tarball |
| comes with a lircd config file. |
| |
| |
| using without lircd |
| =================== |
| |
| XFree86 likely can be configured to recognise the remote keys. Once I |
| simply tried to configure one of the multimedia keyboards as input |
| device, which had the effect that XFree86 recognised some of the keys |
| of my remote control and passed volume up/down key presses as |
| XF86AudioRaiseVolume and XF86AudioLowerVolume key events to the X11 |
| clients. |
| |
| It likely is possible to make that fly with a nice xkb config file, |
| I know next to nothing about that through. |
| |
| |
| Have fun, |
| |
| Gerd |
| |
| -- |
| Gerd Knorr <kraxel@bytesex.org> |
