sys/platform/pc32/include/speaker.h

   1 /*
   2  * speaker.h -- interface definitions for speaker ioctl()
   3  *
   4  * v1.4 by Eric S. Raymond (esr@snark.thyrsus.com) Aug 1993
   5  *      modified for FreeBSD by Andrew A. Chernov <ache@astral.msk.su>
   6  *
   7  * $FreeBSD: src/sys/i386/include/speaker.h,v 1.6 1999/08/28 00:44:26 peter Exp $
   8  * $DragonFly: src/sys/platform/pc32/include/speaker.h,v 1.2 2003/06/17 04:28:36 dillon Exp $
   9  */
  10
  11 #ifndef _MACHINE_SPEAKER_H_
  12 #define _MACHINE_SPEAKER_H_
  13
  14 #include <sys/ioccom.h>
  15
  16 #define SPKRTONE        _IOW('S', 1, tone_t)    /* emit tone */
  17 #define SPKRTUNE        _IO('S', 2)             /* emit tone sequence*/
  18
  19 typedef struct
  20 {
  21     int frequency;      /* in hertz */
  22     int duration;       /* in 1/100ths of a second */
  23 }
  24 tone_t;
  25
  26 /*
  27  * Strings written to the speaker device are interpreted as tunes and played;
  28  * see the spkr(4) man page for details.
  29  */
  30
  31 #endif /* !_MACHINE_SPEAKER_H_ */