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Difference between revisions of "Rock/LED"

m (Naobsd moved page Rock/led to Rock/LED)
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The RR has 3 leds, green(172), blue(174), red(175). All can be programmable.
+
The RR has 3 LEDs, green(172), blue(174), red(175). All can be programmable.
  
 
Below is a small script to flash the green led on RR.
 
Below is a small script to flash the green led on RR.
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done
 
done
 
</pre>
 
</pre>
 +
 +
== LED class and triggers ==
 +
 +
on radxa-rock/android-kk branch, 3 LEDs are configured as LED class devices. you can control LEDs via /sys/class/leds/.

Revision as of 01:03, 17 April 2014

The RR has 3 LEDs, green(172), blue(174), red(175). All can be programmable.

Below is a small script to flash the green led on RR.

#!/bin/sh

# enable the gpio 172 -> green led
echo 172 > /sys/class/gpio/export

# set the direction to output
echo "out" > /sys/class/gpio/gpio172/direction
while true;
do
echo 0 > /sys/class/gpio/gpio172/value #led on
sleep 1
echo 1 > /sys/class/gpio/gpio172/value #led off
sleep 1
done

LED class and triggers

on radxa-rock/android-kk branch, 3 LEDs are configured as LED class devices. you can control LEDs via /sys/class/leds/.