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RE: questions about keyboard

To: 'Geert Uytterhoeven' <>
Subject: RE: questions about keyboard
From: "Xu, Jiang" <>
Date: Wed, 14 Apr 2004 14:56:20 -0600
Cc: Linux/MIPS Development <>
Original-recipient: rfc822;
I do turn on CONFIG_VT, if I don't I will not be able to pass compiling the
keyboard.c and some other stuffs.
Because I did not turn on INPUT_EVDEV, so I did not create the device node

However, I just gave it a quick try by turning on INPUT_EVDEV and create the
device nodes; and actually I saw response on input/event0!! Thanks!

Now I have some questions:
1.  I have CONFIG_VT on, so why ttyN is not connected to the device? I saw
console.o and tty_io.o, etc.
What may be wrong or did I miss doing some things that I should do?
2.  In the application, how can I know which input/event# the usb keyboard
connects to?
3.  Is there some reference documents about how to read things from
input/event# ? I mean such as how to read key event?



-----Original Message-----
From: Geert Uytterhoeven [] 
Sent: Wednesday, April 14, 2004 2:37 PM
To: Xu, Jiang
Cc: Linux/MIPS Development
Subject: RE: questions about keyboard

On Wed, 14 Apr 2004, Xu, Jiang wrote:
> Well, this is the problem.
> For some reasons, none of the /dev/tty /dev/tty0... /dev/console is 
> connected to the keyboard, I have tried listening all of them.  Did I 
> configured something wrong? But kernel seems to be getting the key 
> event from the keyboard. Another question is if it should connect to 
> one of those device nodes, is there anyway I can hack the kernel to 
> see where the key event sent to?

Do you have CONFIG_VT=y? I guess not.

Do you receive anything on /dev/input/eventX?

> -----Original Message-----
> From: Jan-Benedict Glaw []
> Sent: Wednesday, April 14, 2004 2:26 PM
> To:
> Subject: Re: questions about keyboard
> On Wed, 2004-04-14 14:18:18 -0600, Xu, Jiang <> 
> wrote in message 
> <>:
> > However, what I don't get is how can I get the key event from the 
> > kernel?  I tried to listen to all the ttyN, but none of them connect 
> > to
> the keyboard.
> > I wonder how I can write a user space application that can get the 
> > key event?  Could somebody help me out?  Because it is an embedded 
> > device,
> there
> > is no X.
> Well, one of /dev/tty, /dev/tty0 or /dev/console should work. If you'd 
> likt to use the new'n'fancy style, use /dev/input/eventX .



Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like
                                                            -- Linus

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