Using RS232 Terminal as input device

[Guennadi Liakhovetski]

On Tue, 6 Jun 2006 hbruegge at rockwellcollins.com wrote:

> Hi all
> 
> 
> I am using the kernel (2.6.15) in an ppc-based embedded system through a 
> serial console on ttyS0 with no problems.
> 
> Now I attached a graphic card to the system, which is correctly 
> recognized and initialised by the Kernel. If I add "console=tty0 
> console=ttyS0,57600" to the bootargs, I have the boot messages of the 
> kernel on the screen and a login on the ttyS0.
> 
> What I now want to do is to disable the serial console and use the 
> graphic card as output and the raw character data (ASCII) coming in from 
> the terminal connected to the rs232 as input.

Well, it is possible... The keyword to google for is inputattach. A 
hint - it is a part of the linux-console package on sourceforge: 
http://linuxconsole.cvs.sourceforge.net/linuxconsole/ruby/utils/. You 
probably will have to write some glue driver. Or, probably, an easier 
option - write a user-space daemon that reads from /dev/ttyS0 and sends 
events to uinput. With this you don't need any kernel drivers - just a 
user-space daemon.

HTH
Guennadi
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Guennadi Liakhovetski