Raspberry Pi Official Touch Screen

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In 2015 the Raspberry Pi foundation brought out an official 7" touch screen device that uses the DSI interface.

This entry will describe several uses and tips.

Switch the backlight

pi@raspberrypi ~ $ uname -a
Linux raspberrypi 4.1.12-v7+ #824 SMP PREEMPT Wed Oct 28 16:46:35 GMT 2015 armv7l GNU/Linux

If you have an older version you can upgrade: 

sudo rpi-update

When finished reboot. 

off:
echo 1 > /sys/class/backlight/rpi_backlight/bl_power
on
echo 0 > /sys/class/backlight/rpi_backlight/bl_power

If you get permission errors 

sudo chmod 777 /sys/devices/platform/rpi_backlight/backlight/rpi_backlight/bl_power
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