xilinx-zcu102-20232 login: petalinux
password: root
cd /sys/class/gpio
ls
cat gpiochip*/label
echo 495 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio495/direction
echo 1 > /sys/class/gpio/gpio495/value # write 1 (open)
echo 0 > /sys/class/gpio/gpio495/value # write 0 (close)
echo 495 > /sys/class/gpio/unexport