208 lines
5.1 KiB
C
208 lines
5.1 KiB
C
#if defined(REFCLOCK) && (defined(PARSE) || defined(PARSEPPS)) && defined(CLOCK_SCHMID)
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/*
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* /src/NTP/REPOSITORY/v3/parse/clk_schmid.c,v 3.13 1994/02/20 13:04:41 kardel Exp
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*
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* clk_schmid.c,v 3.13 1994/02/20 13:04:41 kardel Exp
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*
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* Schmid clock support
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*
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* Copyright (c) 1992,1993,1994
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* Frank Kardel Friedrich-Alexander Universitaet Erlangen-Nuernberg
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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*/
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#include "sys/types.h"
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#include "sys/time.h"
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#include "sys/errno.h"
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#include "ntp_fp.h"
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#include "ntp_unixtime.h"
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#include "ntp_calendar.h"
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#include "parse.h"
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/*
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* Description courtesy of Adam W. Feigin et. al (Swisstime iis.ethz.ch)
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*
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* The command to Schmid's DCF77 clock is a single byte; each bit
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* allows the user to select some part of the time string, as follows (the
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* output for the lsb is sent first).
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*
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* Bit 0: time in MEZ, 4 bytes *binary, not BCD*; hh.mm.ss.tenths
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* Bit 1: date 3 bytes *binary, not BCD: dd.mm.yy
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* Bit 2: week day, 1 byte (unused here)
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* Bit 3: time zone, 1 byte, 0=MET, 1=MEST. (unused here)
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* Bit 4: clock status, 1 byte, 0=time invalid,
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* 1=time from crystal backup,
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* 3=time from DCF77
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* Bit 5: transmitter status, 1 byte,
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* bit 0: backup antenna
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* bit 1: time zone change within 1h
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* bit 3,2: TZ 01=MEST, 10=MET
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* bit 4: leap second will be
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* added within one hour
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* bits 5-7: Zero
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* Bit 6: time in backup mode, units of 5 minutes (unused here)
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*
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*/
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#define WS_TIME 0x01
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#define WS_SIGNAL 0x02
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#define WS_ALTERNATE 0x01
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#define WS_ANNOUNCE 0x02
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#define WS_TZ 0x0c
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#define WS_MET 0x08
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#define WS_MEST 0x04
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#define WS_LEAP 0x10
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static unsigned LONG cvt_schmid();
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clockformat_t clock_schmid =
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{
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cvt_schmid, /* Schmid conversion */
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syn_simple, /* easy time stamps */
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(unsigned LONG (*)())0, /* not direct PPS monitoring */
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(unsigned LONG (*)())0, /* no time code synthesizer monitoring */
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(void *)0, /* conversion configuration */
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"Schmid", /* Schmid receiver */
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12, /* binary data buffer */
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F_END|SYNC_START, /* END packet delimiter / synchronisation */
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{ 0, 0},
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'\0',
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(unsigned char)'\375',
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'\0'
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};
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static unsigned LONG
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cvt_schmid(buffer, size, format, clock)
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register char *buffer;
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register int size;
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register struct format *format;
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register clocktime_t *clock;
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{
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if ((size != 11) || (buffer[10] != '\375'))
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{
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return CVT_NONE;
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}
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else
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{
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if (buffer[0] > 23 || buffer[1] > 59 || buffer[2] > 59 || buffer[3] > 9 /* Time */
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|| buffer[0] < 0 || buffer[1] < 0 || buffer[2] < 0 || buffer[3] < 0)
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{
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return CVT_FAIL|CVT_BADTIME;
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}
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else
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if (buffer[4] < 1 || buffer[4] > 31 || buffer[5] < 1 || buffer[5] > 12
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|| buffer[6] > 99)
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{
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return CVT_FAIL|CVT_BADDATE;
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}
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else
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{
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clock->hour = buffer[0];
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clock->minute = buffer[1];
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clock->second = buffer[2];
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clock->usecond = buffer[3] * 100000;
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clock->day = buffer[4];
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clock->month = buffer[5];
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clock->year = buffer[6];
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clock->flags = 0;
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switch (buffer[8] & WS_TZ)
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{
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case WS_MET:
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clock->utcoffset = -1*60*60;
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break;
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case WS_MEST:
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clock->utcoffset = -2*60*60;
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clock->flags |= PARSEB_DST;
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break;
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default:
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return CVT_FAIL|CVT_BADFMT;
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}
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if (!(buffer[7] & WS_TIME))
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{
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clock->flags |= PARSEB_POWERUP;
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}
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if (!(buffer[7] & WS_SIGNAL))
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{
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clock->flags |= PARSEB_NOSYNC;
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}
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if (buffer[7] & WS_SIGNAL)
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{
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if (buffer[8] & WS_ALTERNATE)
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{
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clock->flags |= PARSEB_ALTERNATE;
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}
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if (buffer[8] & WS_ANNOUNCE)
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{
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clock->flags |= PARSEB_ANNOUNCE;
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}
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if (buffer[8] & WS_LEAP)
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{
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clock->flags |= PARSEB_LEAPADD; /* default: DCF77 data format deficiency */
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}
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}
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clock->flags |= PARSEB_S_LEAP|PARSEB_S_ANTENNA;
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return CVT_OK;
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}
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}
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}
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#endif /* defined(PARSE) && defined(CLOCK_SCHMID) */
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/*
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* History:
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*
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* clk_schmid.c,v
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* Revision 3.13 1994/02/20 13:04:41 kardel
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* parse add/delete second support
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*
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* Revision 3.12 1994/02/02 17:45:25 kardel
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* rcs ids fixed
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*
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* Revision 3.10 1994/01/25 19:05:15 kardel
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* 94/01/23 reconcilation
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*
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* Revision 3.9 1994/01/23 17:21:56 kardel
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* 1994 reconcilation
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*
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* Revision 3.8 1993/11/01 20:00:18 kardel
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* parse Solaris support (initial version)
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*
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* Revision 3.7 1993/10/30 09:44:43 kardel
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* conditional compilation flag cleanup
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*
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* Revision 3.6 1993/10/09 15:01:32 kardel
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* file structure unified
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*
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* Revision 3.5 1993/10/03 19:10:47 kardel
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* restructured I/O handling
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*
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* Revision 3.4 1993/09/27 21:08:09 kardel
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* utcoffset now in seconds
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*
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* Revision 3.3 1993/09/26 23:40:27 kardel
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* new parse driver logic
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*
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* Revision 3.2 1993/07/09 11:37:19 kardel
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* Initial restructured version + GPS support
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*
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* Revision 3.1 1993/07/06 10:00:22 kardel
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* DCF77 driver goes generic...
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*
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*/
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