Re: Using RS232 Terminal as input device

On Tue, 6 Jun 2006 hbruegge@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