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--- en:vu8c_backlightcontrol [2017/05/01 10:19]
codewalker
+++ en:vu8c_backlightcontrol [2017/06/09 15:39] (current)
codewalker
@@ Line 135: / Line 135: @@
 </code>
 ===== [ Android ] =====
+[[en:vu_backlight_with_android|How to control backlight of the ODROID-VU5/7/7+/8C]]
-==== 1. Download script ====
-First, set the root filesystem writable using remount command.
-<code>
-# su
-# mount -o rw,remount  /
-</code>
-Make or download the following shell script of the board model that you're using (C1 or C2)\\
-and copy it in **/system/bin/**.\\
-And make its permission executable
-<code>
-# su
-# chmod 755 /system/bin/vu8c_backlight_c2_android.sh
-</code>
-  * ODROID-C2
-<file sh vu8c_backlight_c2_android.sh>
-#!/bin/sh
-path="/sys/class/gpio"
-echo 214 > $path/export
-echo out > $path/gpio214/direction
-echo 0 > $path/gpio214/value
-chown system:system $path/gpio214/value
-cur_stat="On"
-while [ 1 ]; do
-sleep 1
-screen_info=`dumpsys power | grep "Display Power"`
-if [[ $screen_info == *"OFF"* && $cur_stat == "On" ]]; then
-	echo "monitor goes to Off"
-	# backlight off first
-	echo 1 > $path/gpio214/value
-	cur_stat="Off"
-elif [[ $screen_info == *"ON"* && $cur_stat == "Off" ]]; then
-	echo "monitor turns back On"
-	# backlight on later
-	echo 0 > $path/gpio214/value
-	cur_stat="On"
-fi
-done
-</file>
-  * ODROID-C1/C1+
-<file sh vu8c_backlight_c1_android.sh>
-#!/bin/sh
-path="/sys/class/gpio"
-echo 97 > $path/export
-echo out > $path/gpio97/direction
-echo 0 > $path/gpio97/value
-chown system:system $path/gpio97/value
-cur_stat="On"
-while [ 1 ]; do
-sleep 1
-screen_info=`dumpsys power | grep "mScreenOn"`
-if [[ $screen_info == *"false"* && $cur_stat == "On" ]]; then
-	echo "monitor goes to Off"
-	echo 1 > $path/gpio97/value
-	cur_stat="Off"
-elif [[ $screen_info == *"true"* && $cur_stat == "Off" ]]; then
-	echo "monitor turns back On"
-	echo 0 > $path/gpio97/value
-	cur_stat="On"
-fi
-done
-</file>
-==== 2. Configure system init to run script on boot ====
-Now, you need to register the service to run this script automatically on boot time.\\
-Add the following lines in the end of **/system/init.odroid.board.rc**.\\
-Don't forget the root filesystem should be writable as aforementioned.
-- in case of C2
-<code>
-# su
-# vi /system/init.odroid.board.rc
-.....
-.....
-service vu8c_backlight /system/bin/vu8c_backlight_c2_android.sh
-    class main
-    user root
-    group root
-    oneshot
-</code>
-- in case of C1
-<code>
-# su
-# vi /system/init.odroid.board.rc
-.....
-.....
-service vu8c_backlight /system/bin/vu8c_backlight_c1_android.sh
-    class main
-    user root
-    group root
-    oneshot
-</code>
-And then, reboot the system.
-<code>
-# reboot
-</code>