freebsd-dev/usr.sbin/xntpd/include/sys/bsd_audioirig.h
1994-09-29 23:04:24 +00:00

102 lines
3.0 KiB
C

/*
* $Header: bsd_audioirig.h,v 1.0 93/08/02 12:42:00
*/
#ifndef _BSD_AUDIOIRIG_H_
#define _BSD_AUDIOIRIG_H_
#include <sys/time.h>
/********************************************************************/
/* user interface */
/*
* irig ioctls
*/
#if defined(__STDC__) || !(defined(ibm032) && !defined(__GNUC))
#define AUDIO_IRIG_OPEN _IO('A', 50)
#define AUDIO_IRIG_CLOSE _IO('A', 51)
#define AUDIO_IRIG_SETFORMAT _IOWR('A', 52, int)
#else
#define AUDIO_IRIG_OPEN _IO(A, 50)
#define AUDIO_IRIG_CLOSE _IO(A, 51)
#define AUDIO_IRIG_SETFORMAT _IOWR(A, 52, int)
#endif
/*
* irig error codes
*/
#define AUDIO_IRIG_BADSIGNAL 0x01
#define AUDIO_IRIG_BADDATA 0x02
#define AUDIO_IRIG_BADSYNC 0x04
#define AUDIO_IRIG_BADCLOCK 0x08
#define AUDIO_IRIG_OLDDATA 0x10
/********************************************************************/
/*
* auib definitions
*/
#define AUIB_SIZE (0x0040)
#define AUIB_INC (0x0008)
#define AUIB_MOD(k) ((k) & 0x0038)
#define AUIB_INIT(ib) ((ib)->ib_head = (ib)->ib_tail = (ib)->ib_lock = \
(ib)->phase = (ib)->shi = (ib)->slo = (ib)->high = \
(ib)->level0 = (ib)->level1 = \
(ib)->shift[0] = (ib)->shift[1] = (ib)->shift[2] = \
(ib)->shift[3] = (ib)->sdata[0] = (ib)->sdata[1] = \
(ib)->sdata[2] = (ib)->sdata[3] = (ib)->err = 0)
#define AUIB_EMPTY(ib) ((ib)->ib_head == (ib)->ib_tail)
#define AUIB_LEN(ib) (AUIB_MOD((ib)->ib_tail - (ib)->ib_head))
#define AUIB_LEFT(ib) (AUIB_MOD((ib)->ib_head - (ib)->ib_tail - 1))
#define IRIGDELAY 3
#define IRIGLEVEL 1355
#ifndef LOCORE
/*
* irig_time holds IRIG data for one second
*/
struct irig_time {
struct timeval stamp; /* timestamp */
u_char bits[13]; /* 100 irig data bits */
u_char status; /* status byte */
char time[14]; /* time string */
};
/*
* auib's are used for IRIG data communication between the trap
* handler and the software interrupt.
*/
struct auib {
/* driver variables */
u_short active; /* 0=inactive, else=active */
u_short format; /* time output format */
struct irig_time timestr; /* time structure */
char buffer[14]; /* output formation buffer */
/* hardware interrupt variables */
struct timeval tv1,tv2,tv3; /* time stamps (median filter) */
int level0,level1; /* lo/hi input levels */
int level; /* decision level */
int high; /* recent largest sample */
int sl0,sl1; /* recent sample levels */
int lasts; /* last sample value */
u_short scount; /* sample count */
u_long eacc; /* 10-bit element accumulator */
u_long ebit; /* current bit in element */
u_char r_level,mmr1; /* recording level 0-255 */
int shi,slo,phase; /* AGC variables */
u_long err; /* error status bits */
int ecount; /* count of elements this second */
long shift[4]; /* shift register of pos ident */
long sdata[4]; /* shift register of symbols */
int ib_head; /* queue head */
int ib_tail; /* queue tail */
u_short ib_lock; /* queue head lock */
u_long ib_data[AUIB_SIZE]; /* data buffer */
};
#endif
#endif /* _BSD_AUDIOIRIG_H_ */