AVR XMEGA USART example.
Copyright (c) 2010-2018 Microchip Technology Inc. and its subsidiaries.
#include <conf_usart_example.h>
#include <asf.h>
Main function.
References usart_rs232_options::baudrate, board_init(), sysclk_init(), usart_getchar(), usart_init_rs232(), usart_putchar(), USART_SERIAL_CHAR_LENGTH, USART_SERIAL_EXAMPLE, USART_SERIAL_EXAMPLE_BAUDRATE, USART_SERIAL_PARITY, and USART_SERIAL_STOP_BIT.