Ibase SMARC Evaluation Kit Instrukcja Użytkownika Pobierz pdf (Strona 84)

SMARC Evaluation Kit

6.2. How to use GPIO in Linux

6.2.1. GPIO mapping table

RM-F600

Logical Number

Physical Number

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

1 2 ... 79 80 81 82 83 84 85 86 87 88 89 ... 92 93

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Ibase SMARC Evaluation Kit Instrukcja Użytkownika Strona 84