Advantech RSB-4810, User Manual, Page: 49 / 74

41 RSB-4810 User Manual
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NOTE:
You have to configure GPIO to input
rising: Trigger on rising edge
falling: Trigger on falling edge
both: Trigger on both edges
none: Disable interrupt on both edges
Unexport GPIO.
GPIO1 and GPIO2 are taken as an example:
Connect GPIO1 and GPIO2.
Export GPIO1 and GPIO2.
Set GPIO1 to output and GPIO2 to input.
Change GPIO1 to 1 and read GPIO2 value.
Change GPIO1 to 0 and read GPIO2 value.
$ echo 96 > /sys/class/gpio/unexport
$ echo 96 > /sys/class/gpio/export
$ echo 98 > /sys/class/gpio/export
echo "out" > /sys/class/gpio/gpio96/direction
echo "in" > /sys/class/gpio/gpio98/direction
echo 1 > /sys/class/gpio/gpio96/value
cat /sys/class/gpio/gpio98/value
1
echo 0 > /sys/class/gpio/gpio96/value
cat /sys/class/gpio/gpio98/value
0