device-tree/ directory contains examples
+to use device trees, do something like:
+
+ vi device-tree/gpio-leds.dts
+ armbian-add-overlay device-tree/gpio-led.dts
+ dmesg -w &
+ ./overlay-load.sh /boot/overlay-user/gpio-led.dtbo
+
+
+
i2c-usersapce/ contains random i2c userspace device drivers