Basics of 30pin Port
The ODROID-XU3 provides 30Pin GPIOs.
You need to enter into super-user mode first to run below commands !!
sudo su
Easy to use GPIOs
First, you refer to below link.
You check Export number that you want to use GPIO.
Pin description
Create a GPIO file access.
You can access GPIOs using sysfs interface.
echo 29 > /sys/class/gpio/export
Configure the pin direction (in/out)
echo in > /sys/class/gpio/gpio29/direction
Read a value
cat /sys/class/gpio/gpio29/value
LED ON/OFF example
If you want to use LED ON/OFF, first you check the NET name in Expansion Board.
For example, The NET name of D1 is INT23.
According to below link, The Export GPIO number is #31.
Pin description
echo 31 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio31/direction
LED ON
echo 1 > /sys/class/gpio/gpio31/value
LED OFF
echo 0 > /sys/class/gpio/gpio31/value
