EPC-R5710 GPIO

GPIO Pin

Pin	Numbers
GPIO1	43
GPIO2	42
GPIO3	475
GPIO4	474
GPIO5	472

Generate the path node number of the corresponding gpioX, increasing with the export orde.

GPIO Loopback Test (Using GPIO1 and GPIO2 as examples)

Step 1: Connect GPIO1 and GPIO2

Step 2: Export GPIO interface

# echo 43 > /sys/class/gpio/export
# echo 42 > /sys/class/gpio/export
# echo out > /sys/class/gpio/gpio1/direction
# echo in > /sys/class/gpio/gpio2/direction
# cat /sys/class/gpio/gpio2/value
0#
echo 1 > /sys/class/gpio/gpio1/value
# cat /sys/class/gpio/gpio2/value
1