Sachin:

There are a many many examples of implementing byte level communications with the 8051 UART in both C and Assembly language. You can find those by searching 8052.com, Keil.com, or using google.com to search the greater web.

However, when you communicate from computer to computer you will probably want to implement some sort of packet protocol. I offer to let you look at the code in my loader program. Even though it is written in assembly language, it shows a complete implementation of a packet protocol from a Slave Node perspective. You could use this as a spring board and implement the Master Mode end of the protocol and thus craft a working microcontroller to microcontroller communications system.

Loader Code

MICHAEL KARAS