Difference between revisions of "LED"
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With this "nand-disk" option selected, the led will blink each time nand access occur (try with ''sync'' command to see it blinking). | With this "nand-disk" option selected, the led will blink each time nand access occur (try with ''sync'' command to see it blinking). | ||
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| + | === Links === | ||
| + | |||
| + | See the kernel documentation [http://www.mjmwired.net/kernel/Documentation/leds-class.txt Documentation/leds-class.txt] for more information about this driver. | ||
Revision as of 09:37, 10 July 2012
The linux LED driver class
On recent kernel, linux have a led driver. This led can be driven from /sys/class/leds/ directory.
For APF28Dev, the led is configurable under the directory :
# cd /sys/class/leds/apfdev:green:user
Blinking
The blinking style can be selected with trigger file. By defaut on APF28Dev, Heartbeat is selected :
# cat /sys/class/leds/apfdev:green:user/trigger none nand-disk mmc0 timer [heartbeat] backlight gpio default-on
Blinking style can be changed with echo command :
# echo "nand-disk" > /sys/class/leds/apfdev:green:user/trigger # cat /sys/class/leds/apfdev:green:user/trigger none [nand-disk] mmc0 timer heartbeat backlight gpio default-on
With this "nand-disk" option selected, the led will blink each time nand access occur (try with sync command to see it blinking).
Links
See the kernel documentation Documentation/leds-class.txt for more information about this driver.
