If you have your cubieboard stable and do not like the led to blink, you can turn it off.
Basic explanation is in linux-sunxy site.
You can turn leds off by setting brightness to 0 for blue and also for green led (as root).
sudo su -root echo 0 > /sys/class/leds/green:ph20:led1/brightness echo 0 > /sys/class/leds/blue:ph21:led2/brightness
Put that 2 lines into /etc/rc.local so it will stay also after reboot.
If you want to for example blink a blue led:
echo timer > /sys/class/leds/blue:ph21:led2/trigger
To get all available triggers type:
cat /sys/class/leds/blue:ph21:led2/trigger
Creating a root script
Under root, you can create a script that will change the LED blinking so you can then only use sudo and do not have to run it as root.
Become a root:
sudo su - root
I created a file change_led with permission chmod 750:
#!/bin/bash
if [ "$#" -ne 2 ] ; then echo "$0: exactly 2 arguments expected" echo "Please use one of the following:" cat /sys/class/leds/blue:ph21:led2/trigger echo echo "for blue or green LED." echo "sample: change_led blue timer" echo exit 1; fi LED="" if [ "$1" == "blue" ]; then LED="blue:ph21:led2" fi if [ "$1" == "green" ]; then LED="green:ph20:led1" fi echo $2 > /sys/class/leds/$LED/trigger
Now I can just execute the script logged as a user with sudo rights and not directly a root:
sudo /root/change_led blue heartbeat
Change the Led status from GUI
There is a nice script In Cubieforum that enables you to change the LED status from the simple terminal GUI. The script is available in this post: LED trigger manipulator with GUI – script
