Any chance to add one more serial port on micro2440?

Hi,

I want to add a new serial port on micro 2440. 3 aren't enough for me XD
I'm planning to use some unused EINTs (EINT18, EINT19 and EINT20) as TX, RX
and RTS.

I was reading kernel codes and I found the UARTs definitions on:
s3c2440.c
mach-mini2440.c
devs.c 
samsung.c

I'll try to modify these files to add a new com port (ttySAC3). Before
start this saga, I would like to know if anyone have a better and easier
idea.

Thanks in advance
:D

The S3C2440 CPU has only 3 internal UARTs. If you need more than this, you
must attach some additional UART devices (like NS16550) to this CPU (for
example via Mini2440's CON5 header).

I am aware that people use a software UART in some of the small AVR 8bit
uPs.
  
http://www.google.co.nz/#hl=en&source=hp&q=uart+software+avrfrea...

Dave

thanks for your ideas. I'll try the suggestions. Probably a UART software
will be easier for me xD

Thanks.