What can I do with IGEP0030
From IGEP - ISEE Wiki
If you have successfully completed the getting started guide for IGEP0030, you can follow this first introduction about what can you do with this board:
How to handle gpio-LED's
This is probably the most simple feature in the board, but sometimes LED's may be the only way of checking the status of some of your applications.
IGEP0030 has 4 LED's which you can control, for example, using 'echo'. Here is an example of turning LED's On:
echo 1 > /sys/devices/platform/leds-gpio/leds/d210\:green/brightness echo 1 > /sys/devices/platform/leds-gpio/leds/d210\:red/brightness echo 1 > /sys/devices/platform/leds-gpio/leds/d440\:green/brightness echo 1 > /sys/devices/platform/leds-gpio/leds/d440\:red/brightness
You can turn them down using the same command and write '0' instead of '1'. (Note: read known issues below)
If you want to trigger the leds you can enable this mode and select the trigger source (none by default) to: mmc0, mmc1, timer, heartbeat and default-on.
To enable any of this modes you just have to change a parameter in the directory of the led you want to control. You can see all the possibilities using 'cat':
$ cat /sys/devices/platform/leds-gpio/leds/d210\:green/trigger none mmc0 mmc1 timer heartbeat [default-on]
In the example above, we have checked the status of the trigger in led D240:green. Mode 'default-on' is selected.
To change it, for example, to the timer mode you can use 'echo':
echo timer > /sys/devices/platform/leds-gpio/leds/d210\:green/trigger
In this case, we have set the trigger to the 'timer' mode. Now you can set the time for what the led is ON and the time it is OFF using:
echo 250 > /sys/devices/platform/leds-gpio/leds/d210\:green/delay_on echo 750 > /sys/devices/platform/leds-gpio/leds/d210\:green/delay_off
Now the selected led is configured with a timer consisting of 250 miliseconds ON and 750 miliseconds OFF.
