This document contains code for receiving and transmitting a byte using USART on a PIC microcontroller.
The receiving code section initializes ports and registers for USART reception. It then enters a loop to continuously clear the watchdog timer. When a byte is received, it is moved from the receive register to a data variable and output on port B.
The transmitting code initializes ports for output, reads the byte from port B, and calls a subroutine to transmit the data. The subroutine sets up transmission parameters and loads the data byte into the transmit register to be sent via USART. It then waits for transmission to complete before returning.