138 lines
3.8 KiB
C
138 lines
3.8 KiB
C
#if defined(REFCLOCK) && (defined(PARSE) || defined(PARSEPPS)) && defined(CLOCK_TRIMSV6)
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/*
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* /src/NTP/REPOSITORY/v3/parse/clk_trimble.c,v 3.9 1994/02/02 17:45:27 kardel Exp
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*
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* Trimble SV6 clock support
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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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/* 0000000000111111111122222222223333333 / char
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* 0123456789012345678901234567890123456 \ posn
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* >RTMhhmmssdddDDMMYYYYoodnnvrrrrr;*xx< Actual
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* ----33445566600112222BB7__-_____--99- Parse
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* >RTM 1 ;* <", Check
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*/
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#define hexval(x) (('0' <= (x) && (x) <= '9') ? (x) - '0' : \
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('a' <= (x) && (x) <= 'f') ? (x) - 'a' + 10 : \
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('A' <= (x) && (x) <= 'F') ? (x) - 'A' + 10 : \
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-1)
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#define O_USEC O_WDAY
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#define O_GPSFIX O_FLAGS
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#define O_CHKSUM O_UTCHOFFSET
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static struct format trimsv6_fmt =
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{ { { 13, 2 }, {15, 2}, { 17, 4}, /* Day, Month, Year */
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{ 4, 2 }, { 6, 2}, { 8, 2}, /* Hour, Minute, Second */
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{ 10, 3 }, {23, 1}, { 0, 0}, /* uSec, FIXes (WeekDAY, FLAGS, ZONE) */
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{ 34, 2 }, { 0, 0}, { 21, 2}, /* cksum, -, utcS (UTC[HMS]OFFSET) */
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},
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">RTM 1 ;* <",
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0
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};
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static unsigned LONG cvt_trimsv6();
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clockformat_t clock_trimsv6 =
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{ cvt_trimsv6, /* Trimble conversion */
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syn_simple, /* easy time stamps for RS232 (fallback) */
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pps_simple, /* easy PPS monitoring */
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(unsigned LONG (*)())0, /* no time code synthesizer monitoring */
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(void *)&trimsv6_fmt, /* conversion configuration */
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"Trimble SV6",
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37, /* string buffer */
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F_START|F_END|SYNC_START|SYNC_ONE, /* paket START/END delimiter, START synchronisation, PPS ONE sampling */
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{ 0, 0},
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'>',
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'<',
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'\0'
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};
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static unsigned LONG
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cvt_trimsv6(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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LONG gpsfix;
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u_char calc_csum = 0;
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long recv_csum;
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int i;
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if (!Strok(buffer, format->fixed_string)) return CVT_NONE;
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#define OFFS(x) format->field_offsets[(x)].offset
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#define STOI(x, y) \
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Stoi(&buffer[OFFS(x)], y, \
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format->field_offsets[(x)].length)
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if ( STOI(O_DAY, &clock->day) ||
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STOI(O_MONTH, &clock->month) ||
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STOI(O_YEAR, &clock->year) ||
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STOI(O_HOUR, &clock->hour) ||
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STOI(O_MIN, &clock->minute) ||
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STOI(O_SEC, &clock->second) ||
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STOI(O_USEC, &clock->usecond)||
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STOI(O_GPSFIX, &gpsfix)
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) return CVT_FAIL|CVT_BADFMT;
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clock->usecond *= 1000;
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/* Check that the checksum is right */
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for (i=OFFS(O_CHKSUM)-1; i >= 0; i--) calc_csum ^= buffer[i];
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recv_csum = (hexval(buffer[OFFS(O_CHKSUM)]) << 4) |
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hexval(buffer[OFFS(O_CHKSUM)+1]);
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if (recv_csum < 0) return CVT_FAIL|CVT_BADTIME;
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if (((u_char) recv_csum) != calc_csum) return CVT_FAIL|CVT_BADTIME;
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clock->utcoffset = 0;
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/* What should flags be set to ? */
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clock->flags = PARSEB_UTC;
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/* if the current GPS fix is 9 (unknown), reject */
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if (0 > gpsfix || gpsfix > 9) clock->flags |= PARSEB_POWERUP;
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return CVT_OK;
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}
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#endif /* defined(PARSE) && defined(CLOCK_TRIMSV6) */
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/*
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* History:
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*
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* clk_trimble.c,v
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* Revision 3.9 1994/02/02 17:45:27 kardel
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* rcs ids fixed
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*
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* Revision 3.7 1994/01/25 19:05:17 kardel
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* 94/01/23 reconcilation
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*
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* Revision 3.6 1993/10/30 09:44:45 kardel
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* conditional compilation flag cleanup
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*
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* Revision 3.5 1993/10/09 15:01:35 kardel
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* file structure unified
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*
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* revision 3.4
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* date: 1993/10/08 14:44:51; author: kardel;
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* trimble - initial working version
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*
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* revision 3.3
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* date: 1993/10/03 19:10:50; author: kardel;
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* restructured I/O handling
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*
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* revision 3.2
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* date: 1993/09/27 21:07:17; author: kardel;
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* Trimble alpha integration
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*
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* revision 3.1
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* date: 1993/09/26 23:40:29; author: kardel;
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* new parse driver logic
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*
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*/
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