Serial Communication between two microprocessor (H8S2633R) in C language

I am doing a school project that required communication between two microprocessor, I did not convert to RS232 for this communication as the two processor is place next to each other. The program shou开发者_StackOverflow社区ld be able to send and receive the information.When the other party receive it, it will send back a letter back to the processor telling the processor that it has receive it. The program should be an interrupt driven and I am using the high-performance Embedded workshop to write the program. Please help me, struck at this for quite a while. Thanks :)

Download the data sheet for that processor (can one really call a 1500-page document a "data sheet"?) and read chapter 16, "Serial Communication Interface". In particular, it looks like you'll be most interested in section 16.3.3, "Multiprocessor Communication Function."