UART_example_WRITE_STRING
Call this function from main to send a string of characters. This can be a light-weight alternative to printf, e.g. for a string of ASCII characters.
UART_example_PRINTF
Call this function from main to print to a terminal a string with a uint8_t variable
UART_example_READ
Call this function in main() to type a message into a serial terminal for the program to echo back what you typed.