Please provide the UART communication between two PICs (PIC18F4550 as the master and PIC16F877A as the slave) in firmware files with the Hi-tech compiler using MPLAB . I connectted the Rx pin as output pin in PIC18F4550 to Tx pin as input pin in PIC16F877A .

There is no project on this site that does exactly that. A simple Google search will give you USART examples for both devices though, there are plenty of them on the net.

By the way , can u help me to check the codes that i had wrote on this ?? I think u may help

For the 18F you can find some good example code here:

http://www.waitingforfriday.com/index.p ... back-N_ARQ

For the 16F, well I haven't used one of those chips in a number of years, so I might not be the best point of advice. The microchip forum would probably be more useful for USART advice on that chip?

/Simon