Serial Port Setup

I am trying to set up a serial port to
read data from a weather station. I
have some C code that will set up the
allow the port to listen, but I can't
find any information on how to get
the code "into" dev/ttyS0 or ttyS1.
Do I compile it into that directory
with the name ttyS1 and replace it,
or something else?

Thanks!

--Nick

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Nick Bacon                          -
Coordinator, Independent Study Lab  -
Scottsdale Community College        -
480.423.6223                        -