Each byte is echoed back with a short message. Example Application A very simple example prints 'UART Example' at startup, then waits for keystrokes. UART: Serial Port This code implements basic functions to use the UART as a serial port.The C-callable UART drivers included with this application note include buffer management functionality and context-save and restore within In addition, Setup_UART contains self-modifying code which will overwrite the SPORT transmit vector to point to a function called UartTx_Service.