Basic LED Driver for Raspberry Pi

[El Berto]

Hi guys, it’s first time I try to write drivers for Raspberry.

I’ve seen “Basic LED Driver for Raspberry Pi” tutorial and I’ve tryed to modify it for my use (I need to get output time-defined monostable pulse).

Actually, with command echo 40 > /sys/class/LedBlink/LedBlink/period I got a 40 second signal output.

What I can’t understand is: why I got “period” file name?

Where can I set file name?

Searching kernel examples on the web I’ve found similar behaviour module where with command:

cat /sys/class/hcsr04/value

I got as output of driver a string/numeric value.

Is there a way to get an output from LedBlink driver from a different named file instead “period”?

Thanks.

 

[Author]

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