/* This program demonstrates the use of some of the NI-VXI signal functions. 
 * This program routes all signals to the global signal queue, then waits for
 * signals to be written to the controller's signal register.  You could also
 * route interrupts as signals using the RouteVXIint functions, but that is
 * not covered in this example.  Please see your NI-VXI software reference
 * manual and the chapter covering NI-VXI Signal Functions for more detailed
 * information on handling signals.
 */


#include "nivxi.h"
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>

main()
{
  INT16 ret, done = 0;

  UINT16 retsignal;             /* holds the signal that we receive */
  UINT32 retsignalmask;         /* holds the type of signal we receive */
  
  /* Launch VICtext? */

  ret = InitVXIlibrary();       /* always init the VXI library */
  
  printf("\nYou can run this program with VICtext.  If it is not already");
  printf("\nrunning, you can launch it now.  To write a signal to the signal");
  printf("\nregister with VICtext, type 'vxioutreg 0,8,0xfd00'.  This will");
  printf("\nwrite a signal with value 0xfd00 to the signal register");
  printf("\n\nWrite a signal 0xfe00 to quite this program");

  ret = RouteSignal(-1,0);      /* route all signals to the signal queue */
  ret = EnableSignalInt();      /* tell the CPU to accept writes to signal registers */

  while (!done)                 /* loop until we receive signal 0xfe00 */
    {
      /* Wait 10 seconds for a signal to come in */

      ret = WaitForSignal(-1, 0xffff, 20000L, &retsignal, &retsignalmask);
      
      /* If we receive signal 0xfe00 or if we timeout tell program to stop */

	  printf("\nSignal!  %x\n", retsignal);
      if ((retsignal == 0xfe00) || ret == -2)
        done = 1;

    }

  ret = DisableSignalInt();     /* tell CPU to ignore writes to signal register */
  ret = CloseVXIlibrary();     

  printf("\nPress a key to exit...");
  while (!kbhit());

  return 0;	

}