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en:vu8c_backlightcontrol [2017/01/13 11:00] joy.cho [VU8C Backlight On/Off Control by Monitor Status] |
en:vu8c_backlightcontrol [2017/06/09 15:39] (current) codewalker |
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====== VU8C Backlight On/Off Control by Monitor Status ====== | ====== VU8C Backlight On/Off Control by Monitor Status ====== | ||
This wiki page describes the way how to control vu8c backlight on/off when monitor status is triggered by controlling the related GPIO ports.\\ | This wiki page describes the way how to control vu8c backlight on/off when monitor status is triggered by controlling the related GPIO ports.\\ | ||
- | So far, Ubuntu is available with the following scheme and we're investigating it on Android platform now. | + | |
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path="/sys/class/gpio" | path="/sys/class/gpio" | ||
- | echo 234 > $path/export | ||
echo 214 > $path/export | echo 214 > $path/export | ||
- | echo out > $path/gpio234/direction | ||
echo out > $path/gpio214/direction | echo out > $path/gpio214/direction | ||
- | echo 0 > $path/gpio234/value | ||
echo 0 > $path/gpio214/value | echo 0 > $path/gpio214/value | ||
- | chown odroid $path/gpio234/value | ||
chown odroid $path/gpio214/value | chown odroid $path/gpio214/value | ||
</code> | </code> | ||
Line 40: | Line 36: | ||
echo 97 > $path/export | echo 97 > $path/export | ||
- | echo 108 > $path/export | ||
echo out > $path/gpio97/direction | echo out > $path/gpio97/direction | ||
- | echo out > $path/gpio108/direction | ||
echo 0 > $path/gpio97/value | echo 0 > $path/gpio97/value | ||
- | echo 0 > $path/gpio108/value | ||
chown odroid $path/gpio97/value | chown odroid $path/gpio97/value | ||
- | chown odroid $path/gpio108/value | ||
</code> | </code> | ||
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# backlight off first | # backlight off first | ||
echo 1 > $path/gpio214/value | echo 1 > $path/gpio214/value | ||
- | echo 1 > $path/gpio234/value | ||
cur_stat=$stat | cur_stat=$stat | ||
elif [ "$stat" == "On" -a "$cur_stat" == "Off" ]; then | elif [ "$stat" == "On" -a "$cur_stat" == "Off" ]; then | ||
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echo "monitor goes to Off" | echo "monitor goes to Off" | ||
echo 1 > $path/gpio97/value | echo 1 > $path/gpio97/value | ||
- | echo 1 > $path/gpio108/value | ||
cur_stat=$stat | cur_stat=$stat | ||
elif [ "$stat" == "On" -a "$cur_stat" == "Off" ]; then | elif [ "$stat" == "On" -a "$cur_stat" == "Off" ]; then | ||
echo "monitor turns back On" | echo "monitor turns back On" | ||
- | echo 0 > $path/gpio108/value | ||
echo 0 > $path/gpio97/value | echo 0 > $path/gpio97/value | ||
cur_stat=$stat | cur_stat=$stat | ||
Line 146: | Line 135: | ||
</code> | </code> | ||
===== [ Android ] ===== | ===== [ Android ] ===== | ||
- | + | [[en:vu_backlight_with_android|How to control backlight of the ODROID-VU5/7/7+/8C]] | |
- | On Android, we are investigating how to control and run auto control scheme. \\ | + | |
- | As soon as it's done, we will make the instruction guide here. | + | |
- | + | ||
- | <file sh vu8c_backlight_c2_android.sh> | + | |
- | #!/system/bin/sh | + | |
- | + | ||
- | path="/sys/class/gpio" | + | |
- | + | ||
- | echo 234 > $path/export | + | |
- | echo 214 > $path/export | + | |
- | + | ||
- | echo out > $path/gpio234/direction | + | |
- | echo out > $path/gpio214/direction | + | |
- | echo 0 > $path/gpio234/value | + | |
- | echo 0 > $path/gpio214/value | + | |
- | + | ||
- | chown system system $path/gpio234/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 | + | |
- | echo 1 > $path/gpio234/value | + | |
- | cur_stat="Off" | + | |
- | elif [[ $screen_info == *"ON"* && $cur_stat == "Off" ]]; then | + | |
- | echo "monitor turns back On" | + | |
- | echo 0 > $path/gpio234/value | + | |
- | # backlight on later | + | |
- | echo 0 > $path/gpio214/value | + | |
- | cur_stat="On" | + | |
- | fi | + | |
- | done | + | |
- | </file> | + |