Kontron KTAM3874-pITX Bedienungsanleitung PDF herunterladen (Seite 32)

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KTD-S0057-I Page 28 DebianTM Linux® BSP

KTAM3874/pITX Software Guide

6.9 Sysfs Support

Alternative to the KEAPI interface you can use Sysfs to manipulate the GPIOs or the backlight. The example

reads the content and direction of GPIO0 (GP0[10]) and sets the direction to 'output' and the content to

'high'.

Comment:

root@ubuntu:# echo 10 > /sys/class/gpio/export enable GP0[10] access

root@ubuntu:# cat /sys/class/gpio/gpio10/value read content

1 value = high

root@ubuntu:# cat /sys/class/gpio/gpio10/direction read direction

in direction = input

root@ubuntu:# echo "out" > /sys/class/gpio/gpio10/direction set direction to output

root@ubuntu:# echo 1 > /sys/class/gpio/gpio10/value set content to high

root@ubuntu:# echo 10 > /sys/class/gpio/unexport disable GP0[10] access

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