IBASE SMARC-EVK1 - Manual (Page 83)

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6.2. How to use GPIO in Linux
6.2.1. GPIO mapping table
RM-F600
Logical Number Physical Number
1 32
3 34
5 36
7 38
8 39
6.2.2. GPIO sample code
# GPIO example 1: Output (take GPIO 32 as example)
echo 32 > /sys/class/gpio/export
echo out > /sys/class/gpio/gpio32/direction
echo 0 > /sys/class/gpio/gpio32/value
echo 1 > /sys/class/gpio/gpio32/value
# GPIO example 2: Input (take GPIO 32 as example)
echo 32 > /sys/class/gpio/export
echo in > /sys/class/gpio/gpio32/direction
cat /sys/class/gpio/gpio32/value