/* this program reads a frequency and a time from the terminal
   and generates a beep for the prescribed pitch and time.
   As part of error checking,
      the frequency must be between 800 and 4200, and the user
          is asked to re-enter any value outside this range.
     the time must be positive and less than 5.0, and the user
          is asked to re-enter any time outside this range.
*/

#include <stdio.h>
#include <MyroC.h>

int main ()
{
  /* preliminaries */
  printf ("program to generate a beep for a prescribed frequency and time\n");
  rConnect ("/dev/rfcomm0");

  int freq;
  double time;

  /* first read frequency */
  do {
    printf ("enter a frequency between 800 and 4200, inclusive");
    scanf ("%d", &freq);

    if ((freq < 800) || (freq > 4200))
      {
	printf ("frequency must be between 800 and 4200, try again\n");	
      }
  } while ((freq < 800) || (freq > 4200)) ;
    
  /* second read time */
  do {
    printf ("enter a positive time less than 5.0");
    scanf ("%lf", &time);

    if ((time < 0) || (freq >= 5.0))
      {
	printf ("time must be between 0.0 and 5.0, try again\n");	
      }
  } while ((time <0.0) || (time >= 5.0)) ;
    
  printf ("frequency and time are read:  here comes the beep!\n");
  rBeep (time, freq);

  /* wrap up */
  rDisconnect ();
  printf ("program completed\n");

  return 0;
}