Linux IR - Transmitter & Receiver

Chapter: IR - Transmitter

LIRC command: irsend

Reference: http://www.lirc.org/html/irsend.html

-- Help

-h --help display usage summary

-v --version display version

-d --device use given lircd socket [/var/run/lirc/lircd]

-a --address=host[:port] connect to lircd at this address

-# --count=n send command n times

-- DIRECTIVE can be:

SEND_ONCE - send CODE [CODE ...] once

SEND_START - start repeating CODE

SEND_STOP - stop repeating CODE

LIST - list configured remote items

SET_TRANSMITTERS - set transmitters NUM [NUM ...]

SIMULATE - simulate IR event

Procedure

Step-01

# cd lirc-0.8.6

# ./setup.sh

# make && make install

Step-02

# setserial /dev/ttyS0 uart none --> turn off running Serial

# modprobe lirc_serial irq=4 io=0x --> configure LIRC into serial port

Step-03

# lircd  --> Redo required to kill the process of lirced using command #ps aux, and then # kill PID.

Step-04

# irsend SEND_ONCE cisco-38k-100608.conf KEY_POWER  --> Send Power signal

Chapter: IR - Receiver

OS: CentOS 5.4

Kernel: 2.6.18-164.10.1.el5

Package: lirc-0.8.6.tar.bz2

Source from: http://www.lirc.org/

Reference: http://www.igphone.net/archiver/tid-10750.html

A. INSTALLATION

# cd lirc-0.8.6

# ./setup.sh

# make && make install

• Two modules are installed on path
• path: /lib/modules/2.6.18-194.e15/misc/
• file: lirc_dev.ko & lirc_serial.ko

# setserial /dev/ttyS0 uart none --> turn off running Serial

• Install "setserial" if command not found.
• # apt-get install setserial

# modprobe lirc_serial irq=4 io=0x --> configure LIRC into serial port

• PS: can using #dmesg command to check what's wrong after above modprobe.

# mode2  --> test your RCU

note: Ctrl+C to quit the testing.

B. Learning RCU

path: /usr/local/bin/irrecord

# irrecord cisco-38k.conf

Step-01: Information for reading.

// irrecord -  application for recording IR-codes for usage with lirc

//

// Copyright (C) 1998,1999 Christoph Bartelmus(lirc@bartelmus.de)

//

// irrecord: driver supports both sending and receiving

// This program will record the signals from your remote control and create a config file for lircd.

//

// A proper config file for lircd is maybe the most vital part of this package, so you should invest some time to

// create a working config file.

// Although I put a good deal of effort in this program it is often not possible to automatically recognize all features

// of a remote control.

// Often short-comings of the receiver hardware make it nearly impossible.

// If you have problems to create a config file READ THE DOCUMENTATION of this package, especially section /

// "Adding new remote controls" for how to get help.

//

// If there already is a remote control of the same brand available at http://www.lirc.org/remotes/ you might also

// want to try using such a remote as a template.

// The config files already contain all parameters of the protocol used by remotes of a certain brand and knowing

// these parameters makes the job of this program much easier.

// There are also template files for the most common protocols available in the remotes/generic/ directory of the

// source distribution of this package.

// You can use a template files by providing the path of the file as command line parameter.

// Please send the finished config files to <lirc@bartelmus.de> so that I can make them available to others.

// Don't forget to put all information that you can get about the remote control in the header of the file.

//

// Press RETURN to continue.

Step-02: Initial

// Now start pressing buttons on your remote control.

//

// It is very important that you press many different buttons and hold them down for approximately one second.

// Each button should generate at least one dot but in no case more than ten dots of output.

// Don't stop pressing buttons until two lines of dots (2x80) have been generated.

//

// Press RETURN now to start recording.

Step-03: Record RCU key

>>  Now enter the names for the buttons.

>>  Please enter the name for the next button (press <ENTER> to finish recording)

>>  key_1

>>

>>  Now hold down button "key_1".

>>  Got it.

>>  Signal length is 67

>>

>>  Please enter the name for the next button (press <ENTER> to finish recording)

>>  key_2

>>

>>  Now hold down button "key_2".

>>  Got it.

>>  Signal length is 67

>>

>>  Please enter the name for the next button (press <ENTER> to finish recording)

>>

# <Press Enter to stop the record>

C.

# cp cisco-38k.conf /etc/lircd.conf

# lircd  --> Redo required to kill the process of lirced using command #ps aux, and then # kill PID.

# irw --> Verify previous learning

>>  0000000000000001 00 key_1 cisco-38k.conf

>>  0000000000000002 00 key_2 cisco-38k.conf

>>  0000000000000003 00 key_3 cisco-38k.conf

NOTE: 如學習後有Learning 不到的 Key, 可獨自學習 再將code貼入原來的檔案取代.

Chapter: IR - LIRC Key Reference

Reference Data