#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>

#define BAUDRATE B115200            
#define PORT "/dev/ttyS1"

int main(int argc, char **argv) {
	int serial_fd;			//serial port file descriptor
	int len;
	char buffer[255];
	struct termios termios;
	
	if((serial_fd = open("/dev/ttyS1", O_NOCTTY | O_RDWR)) > -1) {
		bzero(&termios, sizeof(termios));
		termios.c_cflag = BAUDRATE | CRTSCTS | CS8 | CLOCAL | CREAD;
		termios.c_iflag = ICRNL;
		termios.c_oflag = 0;
		termios.c_lflag = ICANON;
		termios.c_cc[VMIN] = 1;
		termios.c_cc[VTIME] = 0;
		
		tcflush(serial_fd, TCIFLUSH);
		if(tcsetattr(serial_fd, TCSANOW, &termios) > -1) {
			while(1) {
				len = read(serial_fd, buffer, 255); 
				buffer[len] = 0x00;
				fprintf(stderr, "line[%d]: %s", len, buffer);
			}			
		} else {
			fprintf(stderr, "error setting termios");
		}
	}
	
	return 0;
}