arduino_uno_char_loopback.c

#include "asc_helpers.h"
#include "avr/avr_uart.h"
#include <avr/io.h>
 
#define F_CPU 16000000L
#include <util/delay.h>
#define FOSC 16000000L
//#define BAUD 9600
#define BAUD 19200
#define MYUBRR (FOSC / 16 / BAUD - 1)
#define UART_NO 0
 
uint8_t byteBuffer;
 
int main(void) {
 
  UART_Init(UART_NO, MYUBRR, 0);
 
  while (1) {
    uart_rx_blocking(UART_NO, byteBuffer);
    //_delay_ms(100);
    uart_tx_blocking(UART_NO, byteBuffer);
  }
  return 0;
}