keyboard control library, or program?

[conradin]

Hi all,
Ive been working with the keyboard lately, and have wondered:
If I can control the LEDs on the keyboard, I would have a wonderfully available device to get data from and drive outputs (Ill handle the electric part of this) So I'm wondering, if there a program in Linux I can build a struct around in C that will allow me to listen for key presses, and freely control the keyboard lights?

[MG&TL]

I don't know if this (http://www.linuxtopia.org/online_books/Linux_Kernel_Module_Programming_Guide/x1174.html) helps much?

[conradin]

It looks like it would be helpful, but there are a couple files missing?
my system doesn't recognize
#include <linux/module.h>
#include <linux/config.h>
#include <linux/init.h>
and none of this:
/usr/src/linux/drivers/char/vt_ioctl.c, function vt_ioctl().
/usr/src/linux/drivers/char/keyboard.c, function setledstate().
They might be nice, but I dont know where they are.
What is nice about this article is it tells me ioctl is the way to go.

[MG&TL]

Unless I'm mistaken, you probably need the linux source to include those headers...I'm looking it up, but it was quite difficult last time I tried...

If that seems bit big an effort just to blink some LEDs, you could see if ledd (http://manpages.ubuntu.com/manpages/hardy/man8/ledd.8.html) has an API, otherwise you'll have to include <stdlib.h> and use system().

[conradin]

LEDD, ledcontrol, xset, and others have all looked cool but have not been things I can figure out how to make work. I would think the lights are an address, and that I should be able to flip some bits and make the think light or turn off. but I cant seem to figure this out!:confused::confused:

[juancarlospaco]

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
import fcntl
import os
import time

# here is what are you looking for my young padawan...
KDSETLED = 0x4B32
SCR_LED = 0x01
NUM_LED = 0x02
CAP_LED = 0x04

console_fd = os.open('/dev/console', os.O_NOCTTY)

all_on = SCR_LED | NUM_LED | CAP_LED
all_off = 0

while 1:
fcntl.ioctl(console_fd, KDSETLED, all_on)
time.sleep(0.1)
fcntl.ioctl(console_fd, KDSETLED, all_off)
time.sleep(0.1) # Here changes the Timming, or something more complex

[conradin]

ZOMG! Something did something!!
I have so many questions about the force! How do I control it?
(I'm new to python this week)

[juancarlospaco]

To control the Force you learn must:



import fcntl;help(fcntl)