LIRC Setup for IR Blaster with Ubuntu 18.04
Install LIRC Package
- target
$ sudo apt-get install lirc
While installing lirc, you will be asked about the device type of IR receiver and transmitter.
Since we will set up later manually, just select None.
Configuring LIRC and the driver module
lirc_odroid module driver is already included by default.
Now you need to set up lirc_options.conf and lircd.conf first and then probe the modules with some parameters.
LIRC Configuration
lirc_options.conf
lirc_options.conf is generated by default when lirc is installed
and you need to modify two parameters as following.
- target
$ sudo vi /etc/lirc/lirc_options.conf
driver = default device = /dev/lirc0
Please refer to this link for the whole contents of lirc_options.conf.
lirc_options.conf
hk.lircd.conf
lircd.conf files under /etc/lirc/lircd.conf.d include signal timing information and provide a mapping from button presses to key symbols.
You need to add a new lircd.conf based on your custom remote controller.
With the Hardkernel IR remote controller, the following example is available.
- target
$ sudo vi /etc/lirc/lircd.conf.d/hk.lircd.conf
Here is a sample of hk.lircd.conf.
hk.lircd.conf
Install module and Run lirc service
All necessary configuration is done, you need to install lirc_odroid module and set some parameters.
# The usage of lirc_odroid module
lirc_odroid gpio_out_pin=${gpio_number} invert=[0 or 1] softcarrier=[0 or 1]
Example
ODROID-N2
Supposing to use Pin#15 of ODROID-N2 (GPIO #483),
- target
$ service lircd stop $ modprobe lirc_dev $ modprobe lirc_odroid gpio_out_pin=483 softcarrier=1 invert=1 $ service lircd restart
ODROID-C4
Supposing to use Pin#13 of ODROID-C4 (GPIO #480),
- target
$ service lircd stop $ modprobe lirc_dev $ modprobe lirc_odroid gpio_out_pin=480 softcarrier=1 invert=1 $ service lircd restart
ODROID-C2
Supposing to use Pin#11 of ODROID-C2 (GPIO #247),
- target
$ service lircd stop $ modprobe lirc_dev $ modprobe lirc_odroid gpio_out_pin=247 softcarrier=1 invert=1 $ service lircd restart
ODROID-XU4
Supposing to use Pin#26 of ODROID-XU4 (GPIO #24),
- target
$ service lircd stop $ modprobe lirc_dev $ modprobe lirc_odroid gpio_out_pin=24 softcarrier=1 invert=1 $ service lircd restart
ODROID-C1/C1+
Supposing to use Pin#7 of ODROID-C1/C1+ (GPIO #83),
- target
$ service lircd stop $ modprobe lirc_dev $ modprobe lirc_odroid gpio_out_pin=83 softcarrier=1 invert=1 $ service lirc restart
If you have the warning No such device during modprobe lirc_odroid,
check if the gpio_out_pin is already assigned to another purpose and change to another pins.
Send IR code using 'irsend'
If lirc_odroid module has been loaded and lirc service is running normally, you can get the key list as following.
Please make sure the remote name is same with the name described in /etc/lirc/lircd.conf.d/hk.lircd.conf.
- target
$ irsend LIST odroid "" irsend: 0000000000009966 KEY_LEFT irsend: 000000000000837c KEY_RIGHT irsend: 00000000000053ac KEY_UP irsend: 0000000000004bb4 KEY_DOWN irsend: 000000000000738c KEY_ENTER irsend: 00000000000041be KEY_HOME irsend: 00000000000011ee KEY_MUTE irsend: 000000000000a35c KEY_MENU irsend: 00000000000059a6 KEY_BACK irsend: 000000000000817e KEY_VOLUMEDOWN irsend: 00000000000001fe KEY_VOLUMEUP irsend: 0000000000003bc4 KEY_POWER
irsend is basic LIRC program to send the key code.
- target
$ irsend SEND_ONCE odroid KEY_ENTER
For more detailed information, please refer to this link.
http://www.lirc.org/html/irsend.html
Reference Configuration Files
Please note that some parts in lirc_options.conf depend on the toolchain version,
so select the correct conf file among the following references based on your board.
lirc_options.conf
ODROID-C2/C4/N2
- lirc_options.conf
# These are the default options to lircd, if installed as # /etc/lirc/lirc_options.conf. See the lircd(8) and lircmd(8) # manpages for info on the different options. # # Some tools including mode2 and irw uses values such as # driver, device, plugindir and loglevel as fallback values # in not defined elsewhere. [lircd] nodaemon = False driver = default device = /dev/lirc0 output = /var/run/lirc/lircd pidfile = /var/run/lirc/lircd.pid plugindir = /usr/lib/aarch64-linux-gnu/lirc/plugins permission = 666 allow-simulate = No repeat-max = 600 #effective-user = #listen = [address:]port #connect = host[:port] #loglevel = 6 #release = true #release_suffix = _EVUP #logfile = ... #driver-options = ... [lircmd] uinput = False nodaemon = False # [modinit] # code = /usr/sbin/modprobe lirc_serial # code1 = /usr/bin/setfacl -m g:lirc:rw /dev/uinput # code2 = ... # [lircd-uinput] # add-release-events = False # release-timeout = 200 # release-suffix = _EVUP
ODROID-XU4/C1
- lirc_options.conf
# These are the default options to lircd, if installed as # /etc/lirc/lirc_options.conf. See the lircd(8) and lircmd(8) # manpages for info on the different options. # # Some tools including mode2 and irw uses values such as # driver, device, plugindir and loglevel as fallback values # in not defined elsewhere. [lircd] nodaemon = False driver = default device = /dev/lirc0 output = /var/run/lirc/lircd pidfile = /var/run/lirc/lircd.pid plugindir = /usr/lib/arm-linux-gnueabihf/lirc/plugins permission = 666 allow-simulate = No repeat-max = 600 #effective-user = #listen = [address:]port #connect = host[:port] #loglevel = 6 #release = true #release_suffix = _EVUP #logfile = ... #driver-options = ... [lircmd] uinput = False nodaemon = False # [modinit] # code = /usr/sbin/modprobe lirc_serial # code1 = /usr/bin/setfacl -m g:lirc:rw /dev/uinput # code2 = ... # [lircd-uinput] # add-release-events = False # release-timeout = 200 # release-suffix = _EVUP
hk.lircd.conf
- hk.lircd.conf
begin remote name odroid bits 16 flags SPACE_ENC|CONST_LENGTH eps 30 aeps 100 header 9000 4500 one 563 1688 zero 563 564 ptrail 563 pre_data_bits 16 pre_data 0x4DB2 repeat 9000 2250 gap 100000 toggle_bit_mask 0x0 begin codes KEY_LEFT 0x9966 KEY_RIGHT 0x837C KEY_UP 0x53AC KEY_DOWN 0x4BB4 KEY_ENTER 0x738C KEY_HOME 0x41BE KEY_MUTE 0x11EE KEY_MENU 0xA35C KEY_BACK 0x59A6 KEY_VOLUMEDOWN 0x817E KEY_VOLUMEUP 0x01FE KEY_POWER 0x3BC4 end codes end remote
Please note that the parameter, “gap 100000” should be added in case of IR Blaster.
Without the value, you can get this error.
# irsend SEND_ONCE odroid KEY_LEFT transmission failed Error running command: Input/output error
To support IR RX and IR TX simultaneously on Ubuntu 18.04
If the default node /dev/lirc0 is already occupied for IR receiver and you want to use the both functionalities,
please try the following instruction.
ex) ODROID-C2 case
- target
$ ls /dev/lirc* /dev/lirc0 $ modprobe lirc_odroid gpio_out_pin=247 softcarrier=1 invert=1 $ ls /dev/lirc* /dev/lirc0 /dev/lirc1 $ lsmod Module Size Used by lirc_odroid 4988 0 ir_lirc_codec 4934 0 lirc_dev 10879 2 lirc_odroid,ir_lirc_codec ir_mce_kbd_decoder 3402 0 ir_sanyo_decoder 1657 0 ir_sony_decoder 1663 0 ir_jvc_decoder 1725 0 ir_rc6_decoder 2010 0 ir_rc5_decoder 1586 0 ir_nec_decoder 1789 0 ..... .....
- target
$ lircd --driver=default --device=/dev/lirc1 --output=/var/run/lirc/lirc1 --pidfile=/var/run/lirc/lirc1.pid $ ls /var/run/lirc lirc0 lirc0.pid lirc1 lirc1.pid lircd lircd.pid lircm
- target
$ irsend LIST "" odroid $ irsend SEND_ONCE odroid KEY_POWER -d /var/run/lirc/lirc1
luke.go