IR

= sunxi-3.4 ("legacy" kernel) =

The sunxi-3.4 IR is exposed as a a keyboard on the Linux input device interface. For example, the following simple keybinder application might be used to run arbitrary commands when receiving a specific keycode via IR. You can install it by

$ git clone https://github.com/elopez/keybinder.git $ cd keybinder $ sudo make install

Configuration is handled on /etc/keybinder.conf, as a "keycode,command" pair per line. The application prints every keycode received, so you may as well use it to figure out the keycodes you want to use.

To execute the application, run

$ sudo keybinder /dev/input/event0

= mainline kernel (4.x) and sunxi-cir =

For devices that feature a standard (38 kHz) CIR receiver, the mainline kernel can be configured with. The kernel option is located under "Device drivers", "Multimedia support", "Remote Controller devices", "SUNXI IR remote control"; the driver is named sunxi-cir.

If you compiled the driver as a module, the first step is to make sure that module gets loaded - either by adding it to the autoloaded modules (depends on your distribution), or manually:.

Once the driver is initialized, your kernel log should show something similar to [  110.032464] Registered IR keymap rc-empty [ 110.033667] input: sunxi-ir as /devices/platform/soc@01c00000/1c21800.ir/rc/rc0/input1 [ 110.033729] rc0: sunxi-ir as /devices/platform/soc@01c00000/1c21800.ir/rc/rc0 [ 110.066201] IR NEC protocol handler initialized [ 110.083973] IR RC5(x/sz) protocol handler initialized [ 110.101950] IR Sony protocol handler initialized [ 110.103835] IR JVC protocol handler initialized [ 110.107900] IR RC6 protocol handler initialized [ 110.114389] IR SANYO protocol handler initialized [ 110.116697] IR MCE Keyboard/mouse protocol handler initialized [ 110.119481] input: MCE IR Keyboard/Mouse (sunxi-ir) as /devices/virtual/input/input2 [ 110.119720] sunxi-ir 1c21800.ir: initialized sunXi IR driver [ 110.120865] IR Sharp protocol handler initialized [ 110.130851] IR XMP protocol handler initialized

Check that the sunxi IR shows up in  : I: Bus=0019 Vendor=0001 Product=0001 Version=0100 N: Name="sunxi-ir" P: Phys=sunxi-ir/input0 S: Sysfs=/devices/platform/soc@01c00000/1c21800.ir/rc/rc0/input1 U: Uniq= H: Handlers=kbd event1 B: PROP=0 B: EV=100013 B: KEY=1000000 0 0 0 0 B: MSC=10

I: Bus=0000 Vendor=0000 Product=0000 Version=0000 N: Name="MCE IR Keyboard/Mouse (sunxi-ir)" P: Phys=/input0 S: Sysfs=/devices/virtual/input/input2 U: Uniq= H: Handlers=kbd event2 B: PROP=0 B: EV=100017 B: KEY=30000 0 7 ff87207a c14057ff febeffdf ffefffff ffffffff fffffffe B: REL=3 B: MSC=10
 * Make sure those "H: Handlers=" lines list the event nodes associated with the devices. In case they are missing, there's a chance your kernel may be misconfigured - check that CONFIG_INPUT_EVDEV=y is set!

The device should also be available in /sys/class/rc/, usually as rc0: ~ # cat /sys/class/rc/rc0/protocols other [unknown] rc-5 nec rc-6 jvc sony rc-5-sz sanyo sharp mce_kbd [lirc] xmp The above command lists the available IR protocols. At this point it may be necessary to select a specific protocol that corresponds to the remote you intend to use. You do so by writing to the sysfs node. For example, I have a universal remote control that works with the "nec" protocol - so to configure it, I use:

When you're set, run the  program to check if everything works. Either start it without arguments to get prompted, or pass the input (event) node that corresponds to the Name="sunxi-ir" device. In the above example, that would be.

If all goes well, evtest will now report events for key presses that you do on your infrared remote.

= See also =
 * LIRC
 * IR Controller Register Guide