Backlight Testing; Adc Testing - Embest SBC8600B User Manual

Embest Technology Co., Ltd

3.11.4 Backlight Testing

The backlight brightness has a range from 0 to 8, in which 8 means highest
brightness, 0 means lowest.
Execute the following instructions to test backlight brightness.
a> Execute the following instruction to view the default backlight brightness;

root@arm:~# cat /sys/class/backlight/backlight/brightness
b> Execute the following instructions to set backlight brightness to 0 and check if the
value is set;

root@arm:~# echo 0 > /sys/class/backlight/backlight/brightness
Now backlight is turned off and the LCD shows a black screen.
c> Execute the following instructions to set brightness to level 8;

root@arm:~# echo 8 > /sys/class/backlight/backlight/brightness
The screen is turned on.

3.11.5 ADC Testing

SBC8600B has 4 ADC input channels to measure external analog signal voltages.
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