Switch on backlight with touchscreen?

Forum: Linux
gonzalop 
Is it possible to switch on the backlight by touching the touchscreen if I
don't run any X or other GUI? I have a debian install with just the
terminal on the display and would like to be able to switch on it by
touching the screen. 

I can now switch it on for 10min with the command echo 0 >
/sys/devices/platform/s3c2410-lcd/graphics/fb0/blank, but I would like it
to happen when I touch the display.

edwin 
I did something like this with a QT application...you need tslib installed
for it to work.

here is the relevant code:

you can pick up touch releases with:

void remote::mouseReleaseEvent(QMouseEvent* ev){
     startBacklightTimer();
     ev->accept();
}

then the appropriate code to activate the screen would be something like
this:

void remote::startBacklightTimer(){
    system("cd /sys/devices/platform/s3c24xx_led.5/leds/backlight/ ;echo
255 > brightness;cd");
    bid=this->startTimer(BL_TIMEOUT);
}

but maybe you could set up a shell script using the commands:

/sys/devices/platform/s3c24xx_led.5/leds/backlight/# echo 255 > brightness

to turn on, and:

/sys/devices/platform/s3c24xx_led.5/leds/backlight/# echo 0 > brightness

to turn off.