#include <stdio.h>   /* Standard input/output definitions */
#include <string.h>  /* String function definitions */
#include <unistd.h>  /* UNIX standard function definitions */
#include <fcntl.h>   /* File control definitions */
#include <errno.h>   /* Error number definitions */
#include <termios.h> /* POSIX terminal control definitions */

/* pass a char number to be sent to serial port /dev/com2 */
int main(int argc, char *argv[])
{    
	int fd2 = 0;
	char temp;

	//open serial port for writing
	fd2 = init_serial();
 
	temp = atoi(argv[1]);
	//printf("value is %d\n",temp);
	send_to_serial(fd2,temp);
	close(fd2);
	return 0;
}


int send_to_serial(int fd, int temp)   /* I - Serial port file */
{
	char buffer;
	buffer = temp;
	write(fd, &buffer, 1);	/***send to infrared through file descriptor***/
	fflush(stdout);
        return 1;
}


int init_serial(void)	/***open the serial port for writing****/
{
  int fd; /* File descriptor for the port */
  struct termios options;
  /* open the port */
  fd = open("/dev/com2", O_RDWR | O_NOCTTY | O_NDELAY);
  if (fd == -1)
  {
      perror("open_port: Unable to open /dev/.... - ");
  }
  fcntl(fd, F_SETFL, 0);

  /* get the current options */
  tcgetattr(fd, &options);
  /* Set to 9600 Baud */
  cfsetispeed(&options, B9600);
  cfsetospeed(&options, B9600);

  /* set raw input, 1 second timeout */
  options.c_cflag     |= (CLOCAL | CREAD);
  options.c_lflag     &= ~(ICANON | ECHO | ECHOE | ISIG);
  options.c_oflag     &= ~OPOST;
  options.c_cc[VMIN]  = 0;
  options.c_cc[VTIME] = 10;

  /* set the options */
  tcsetattr(fd, TCSANOW, &options);
  return fd;
}