problem with receive and transmit using rs232

My crystal ball is unfortunately broken right now, which makes it difficult to find out what your "problem" is.

A first indication is that you seem to use code that was written for PIC microcontrollers, and this certainly won't compile properly on the Nios platform. Use the proper standard I/O functions.

What is at the other end of your rs232 link.

Avoid hyperterminal, it will only cause you grief.

The serial support in putty is much less user-hostile.