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--- tutorials:cb1:customization:wireless_music_box [2013/11/23 19:45]
soloforce
+++ tutorials:cb1:customization:wireless_music_box [2013/12/23 14:50] (current)
@@ Line 8: / Line 8: @@
 ===== Abstract =====
-Cubieboard series have support for infra-read (IR) support and analog sound ouput. Together with mplayer, Cubieboard could be turned into a great music box.
+Cubieboard series have support for infra-red (IR) support and analog sound ouput. Together with mplayer & LIRC, Cubieboard could be turned into a great music box.
 ===== Prerequisite =====
   * A Cubieboard (1,2,3 are ok, theoretically)
@@ Line 21: / Line 21: @@
       <*> sunxi IR support
 </file>
+If you compile the sunxi IR support as a module, it would be sunxi-ir.ko
 ===== IR interface =====
 If your kernel has already support IR feature, you can test the IR device interface.
@@ Line 42: / Line 43: @@
 0000070 c0d7 528c 273e 0004 0000 0000 0000 0000
 </code>
-Pay attention to digits such as "0009", "0015", yes, they are the remote keycode, and you'd better write them down.
+Pay attention to digits such as "0009", "0015", yes, they are the remote keycode, and you'd better write them down. Take notice that these keycodes are hexadecimal value.
 ===== Software Installation =====
 <code>
@@ Line 49: / Line 50: @@
 ===== LIRC Configuration =====
+LIRC is a package that allows you to decode and send infra-red signals of many (but not all) commonly used remote controls (http://www.lirc.org/). The configuration for Cubieboard is a little bit complicated, which involes 4 files. Let's do it step by step.
+==== udev rule file ====
+Create a udev rule file, like //* /etc/udev/rules.d/10-cubie-ir.rules *// whose content is as follows
+<file>
+SUBSYSTEM=="input", ACTION=="add", KERNEL=="event*", ATTRS{name}=="sunxi-ir", SYMLINK+="input/cubieir"
+</file>
+==== IR interface file for LIRC ====
+Modify the //**/etc/lirc/hardware.conf**// now, modify the following lines
+<file>
+#Try to load appropriate kernel modules
+LOAD_MODULES=true
+# Run "lircd --driver=help" for a list of supported drivers.
+DRIVER="devinput"
+# usually /dev/lirc0 is the correct setting for systems using udev
+DEVICE="/dev/input/cubieir"
+MODULES="sunxi-ir"
+</file>
+==== LIRC keycode table ====
+Edit //**/etc/lirc/lircd.conf**// in your case. The **codes** section should be altered according to your own keycodes definitions, and they are in decimal form.
+<file>
+begin remote
+	name            devinput
+	bits            16
+	eps             30
+	aeps            100
+	pre_data_bits   16
+	pre_data        0x0001
+	post_data_bits  32
+	post_data       0x00000001
+	gap             132799
+	toggle_bit      0
+	begin codes
+		POWER                   69
+		MUTE                    71
+		VOLUME+                 9
+		VOLUME-                 21
+		MODE                    70
+		MOUSE                   109
+		HOME                    108
+		BACK                    110
+		LEFT                    100
+		RIGHT                   101
+		UP                      102
+		DOWN                    103
+		OK                      105
+		STOP                    106
+		PLAY                    68
+		SHUFFLE                 25
+		PREV                    64
+		NEXT                    67
+		RED                     185
+		GREEN                   178
+		YELLOW                  173
+		BLUE                    172
+		EQ			7
+                       12
+                       24
+                       94
+                       8
+                       28
+                       90
+                       66
+                       82
+                       74
+                       22
+		AUDIO                   168
+		USD                	13
+	end codes
+end remote
+</file>
+The above keycode definitions are for the IR remote like this
+{{:tutorials:cb1:customization:2013-11-23-202655_433x296_scrot.png?400 |}}
+==== LIRC control file ====
+Edit //**/etc/lirc/lircrc.conf**// in your case.
+<file>
+begin
+     button = VOLUME+
+     prog = mplayer
+     config = volume 1
+     repeat = 1
+end
+begin
+    button = VOLUME-
+    prog = mplayer
+    config = volume -1
+    repeat = 1
+end
+begin
+    button = PLAY
+    prog = mplayer
+    config = pause
+end
+begin
+    button = MUTE
+    prog = mplayer
+    config = mute
+end
+begin
+    button = POWER
+    prog = mplayer
+    config = stop
+end
+begin
+    button = NEXT
+    prog = mplayer
+    config = pt_step +1
+end
+begin
+    button = PREV
+    prog = mplayer
+    config = pt_step -1
+end
+#----------------------------
+begin
+    button = 0
+    prog = irexec
+    config = start_mplayer.sh
+end
+begin
+    button = SHUFFLE
+    prog = irexec
+    config = start_mplayer.sh rescan
+end
+</file>
 ===== Player Program =====
+Mplayer has well support for LIRC, but we still need do some work to make it functional like a music box. We intend to make mplayer scan some specified directory (on Cubieboard or network-sharing directory), picking out those supported music files, like ape, flac, mp3, ogg etc., and play them in a shuffle way. Here goes the shell code snippet.
+<code bash>
+#!/bin/bash
+# start_mplayer.sh
+# Set this line in your case. A play.list file will be created in this directory, so make it writable.
+MUSIC_PATH="/data/share/music"
+PLAY_LIST="play.list"
+MUSIC_TYPES="mp3 wav ape ogg flac";
+if [ ! -e "${MUSIC_PATH}/${PLAY_LIST}" ] || ( [ $# -gt 0 ] && [ $1 == "rescan" ] ); then
+    echo "" >  ${MUSIC_PATH}/${PLAY_LIST}
+    for music_type in $MUSIC_TYPES ; do
+        find ${MUSIC_PATH} -type f -iname "*.${music_type}" >> ${MUSIC_PATH}/${PLAY_LIST}
+    done
+fi
+mplayer -lircconf /etc/lirc/lircrc.conf -vo null -shuffle -playlist  ${MUSIC_PATH}/${PLAY_LIST}
+</code>
+Assign this script with an executable bit, and test it.
+  # chmod +x start_mplayer.sh
+  # ./start_mplayer.sh rescan
+If mplayer is starting playing the music, good to go.
+===== Run LIRC with mplayer =====
+You can test LIRC with mplayer right now, with //**irexec**//, a convenient tool for running programs via LIRC.
+  # irexec -d /etc/lirc/lircrc.conf
+Now, press your IR remote key, enjoy the music comes from Cubieboard.
+If you would like the program running in a daemon style, add the fowlling line into //**/etc/rc.local**//, right before "exit 0".
+<file>
+sudo /usr/bin/irexec -d /etc/lirc/lircrc.conf
+## If there is no "sudo", irexec won't work, which is weird.
+</file>
 <WRAP noprint>
 {{tag>Cubieboard Cubieboard2 IR remote music}}
 </WRAP>

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