1999-12-09 13:01:21 +00:00
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/*
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2008-08-18 14:26:05 +00:00
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* /src/NTP/ntp4-dev/libparse/clk_trimtsip.c,v 4.17 2005/04/16 17:32:10 kardel RELEASE_20050508_A
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1999-12-09 13:01:21 +00:00
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*
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2008-08-18 14:26:05 +00:00
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* clk_trimtsip.c,v 4.17 2005/04/16 17:32:10 kardel RELEASE_20050508_A
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*
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* Trimble TSIP support
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* Thanks to Sven Dietrich for providing test hardware
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*
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* Copyright (c) 1995-2005 by Frank Kardel <kardel <AT> ntp.org>
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* Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universit<EFBFBD>t Erlangen-N<EFBFBD>rnberg, Germany
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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1999-12-09 13:01:21 +00:00
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_TRIMTSIP)
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#include "ntp_syslog.h"
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#include "ntp_types.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 "ntp_machine.h"
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#include "ntp_stdlib.h"
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#include "parse.h"
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#ifndef PARSESTREAM
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2001-08-29 14:35:15 +00:00
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# include <stdio.h>
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1999-12-09 13:01:21 +00:00
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#else
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2001-08-29 14:35:15 +00:00
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# include "sys/parsestreams.h"
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#endif
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1999-12-09 13:01:21 +00:00
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#include "ascii.h"
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#include "binio.h"
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#include "ieee754io.h"
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#include "trimble.h"
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/*
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* Trimble low level TSIP parser / time converter
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*
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* The receiver uses a serial message protocol called Trimble Standard
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* Interface Protocol (it can support others but this driver only supports
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* TSIP). Messages in this protocol have the following form:
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*
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* <DLE><id> ... <data> ... <DLE><ETX>
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*
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* Any bytes within the <data> portion of value 10 hex (<DLE>) are doubled
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* on transmission and compressed back to one on reception. Otherwise
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* the values of data bytes can be anything. The serial interface is RS-422
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* asynchronous using 9600 baud, 8 data bits with odd party (**note** 9 bits
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* in total!), and 1 stop bit. The protocol supports byte, integer, single,
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* and double datatypes. Integers are two bytes, sent most significant first.
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* Singles are IEEE754 single precision floating point numbers (4 byte) sent
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* sign & exponent first. Doubles are IEEE754 double precision floating point
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* numbers (8 byte) sent sign & exponent first.
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* The receiver supports a large set of messages, only a very small subset of
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* which is used here.
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*
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* From this module the following are recognised:
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*
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* ID Description
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*
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* 41 GPS Time
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* 46 Receiver health
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* 4F UTC correction data (used to get leap second warnings)
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*
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* All others are accepted but ignored for time conversion - they are passed up to higher layers.
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*
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*/
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static offsets_t trim_offsets = { 0, 1, 2, 3, 4, 5, 6, 7 };
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struct trimble
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{
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u_char t_in_pkt; /* first DLE received */
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u_char t_dle; /* subsequent DLE received */
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u_short t_week; /* GPS week */
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u_short t_weekleap; /* GPS week of next/last week */
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u_short t_dayleap; /* day in week */
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u_short t_gpsutc; /* GPS - UTC offset */
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u_short t_gpsutcleap; /* offset at next/last leap */
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u_char t_operable; /* receiver feels OK */
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u_char t_mode; /* actual operating mode */
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u_char t_leap; /* possible leap warning */
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u_char t_utcknown; /* utc offset known */
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};
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#define STATUS_BAD 0 /* BAD or UNINITIALIZED receiver status */
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#define STATUS_UNSAFE 1 /* not enough receivers for full precision */
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#define STATUS_SYNC 2 /* enough information for good operation */
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static unsigned long inp_tsip P((parse_t *, unsigned int, timestamp_t *));
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static unsigned long cvt_trimtsip P((unsigned char *, int, struct format *, clocktime_t *, void *));
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struct clockformat clock_trimtsip =
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{
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inp_tsip, /* Trimble TSIP input handler */
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cvt_trimtsip, /* Trimble TSIP conversion */
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pps_one, /* easy PPS monitoring */
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0, /* no configuration data */
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"Trimble TSIP",
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400, /* input buffer */
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sizeof(struct trimble) /* private data */
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};
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#define ADDSECOND 0x01
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#define DELSECOND 0x02
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static unsigned long
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inp_tsip(
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parse_t *parseio,
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unsigned int ch,
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timestamp_t *tstamp
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)
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{
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struct trimble *t = (struct trimble *)parseio->parse_pdata;
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if (!t)
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return PARSE_INP_SKIP; /* local data not allocated - sigh! */
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if (!t->t_in_pkt && ch != DLE) {
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/* wait for start of packet */
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return PARSE_INP_SKIP;
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}
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if ((parseio->parse_index >= (parseio->parse_dsize - 2)) ||
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(parseio->parse_dtime.parse_msglen >= (sizeof(parseio->parse_dtime.parse_msg) - 2)))
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{ /* OVERFLOW - DROP! */
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t->t_in_pkt = t->t_dle = 0;
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parseio->parse_index = 0;
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parseio->parse_dtime.parse_msglen = 0;
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return PARSE_INP_SKIP;
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}
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switch (ch) {
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case DLE:
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if (!t->t_in_pkt) {
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t->t_dle = 0;
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t->t_in_pkt = 1;
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parseio->parse_index = 0;
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parseio->parse_data[parseio->parse_index++] = ch;
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parseio->parse_dtime.parse_msglen = 0;
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parseio->parse_dtime.parse_msg[parseio->parse_dtime.parse_msglen++] = ch;
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parseio->parse_dtime.parse_stime = *tstamp; /* pick up time stamp at packet start */
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} else if (t->t_dle) {
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/* Double DLE -> insert a DLE */
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t->t_dle = 0;
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parseio->parse_data[parseio->parse_index++] = DLE;
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parseio->parse_dtime.parse_msg[parseio->parse_dtime.parse_msglen++] = DLE;
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} else
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t->t_dle = 1;
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break;
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case ETX:
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if (t->t_dle) {
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/* DLE,ETX -> end of packet */
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parseio->parse_data[parseio->parse_index++] = DLE;
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parseio->parse_data[parseio->parse_index] = ch;
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parseio->parse_ldsize = parseio->parse_index+1;
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memcpy(parseio->parse_ldata, parseio->parse_data, parseio->parse_ldsize);
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parseio->parse_dtime.parse_msg[parseio->parse_dtime.parse_msglen++] = DLE;
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parseio->parse_dtime.parse_msg[parseio->parse_dtime.parse_msglen++] = ch;
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t->t_in_pkt = t->t_dle = 0;
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return PARSE_INP_TIME|PARSE_INP_DATA;
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}
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default: /* collect data */
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t->t_dle = 0;
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parseio->parse_data[parseio->parse_index++] = ch;
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parseio->parse_dtime.parse_msg[parseio->parse_dtime.parse_msglen++] = ch;
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}
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return PARSE_INP_SKIP;
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}
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static int
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getshort(
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unsigned char *p
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)
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{
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return get_msb_short(&p);
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}
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/*
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* cvt_trimtsip
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*
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* convert TSIP type format
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*/
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static unsigned long
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cvt_trimtsip(
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unsigned char *buffer,
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int size,
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struct format *format,
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clocktime_t *clock_time,
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void *local
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)
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{
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register struct trimble *t = (struct trimble *)local; /* get local data space */
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#define mb(_X_) (buffer[2+(_X_)]) /* shortcut for buffer access */
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register u_char cmd;
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clock_time->flags = 0;
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if (!t) {
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return CVT_NONE; /* local data not allocated - sigh! */
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}
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if ((size < 4) ||
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(buffer[0] != DLE) ||
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(buffer[size-1] != ETX) ||
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(buffer[size-2] != DLE))
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{
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printf("TRIMBLE BAD packet, size %d:\n", size);
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return CVT_NONE;
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}
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else
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{
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unsigned char *bp;
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cmd = buffer[1];
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switch(cmd)
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{
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case CMD_RCURTIME:
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{ /* GPS time */
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l_fp secs;
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int week = getshort((unsigned char *)&mb(4));
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l_fp utcoffset;
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l_fp gpstime;
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bp = &mb(0);
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if (fetch_ieee754(&bp, IEEE_SINGLE, &secs, trim_offsets) != IEEE_OK)
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return CVT_FAIL|CVT_BADFMT;
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if ((secs.l_i <= 0) ||
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(t->t_utcknown == 0))
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{
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clock_time->flags = PARSEB_POWERUP;
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return CVT_OK;
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}
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if (week < 990) {
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week += 1024;
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}
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/* time OK */
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/* fetch UTC offset */
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bp = &mb(6);
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if (fetch_ieee754(&bp, IEEE_SINGLE, &utcoffset, trim_offsets) != IEEE_OK)
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return CVT_FAIL|CVT_BADFMT;
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L_SUB(&secs, &utcoffset); /* adjust GPS time to UTC time */
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gpstolfp((unsigned short)week, (unsigned short)0,
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|
|
|
|
|
secs.l_ui, &gpstime);
|
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|
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|
|
gpstime.l_uf = secs.l_uf;
|
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|
|
clock_time->utctime = gpstime.l_ui - JAN_1970;
|
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|
|
TSFTOTVU(gpstime.l_uf, clock_time->usecond);
|
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|
|
|
|
|
|
|
if (t->t_leap == ADDSECOND)
|
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|
|
clock_time->flags |= PARSEB_LEAPADD;
|
|
|
|
|
|
|
|
|
|
|
|
if (t->t_leap == DELSECOND)
|
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|
|
|
clock_time->flags |= PARSEB_LEAPDEL;
|
|
|
|
|
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|
|
|
|
|
|
switch (t->t_operable)
|
|
|
|
|
|
{
|
|
|
|
|
|
case STATUS_SYNC:
|
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|
|
|
|
clock_time->flags &= ~(PARSEB_POWERUP|PARSEB_NOSYNC);
|
|
|
|
|
|
break;
|
|
|
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|
|
|
|
|
|
|
case STATUS_UNSAFE:
|
|
|
|
|
|
clock_time->flags |= PARSEB_NOSYNC;
|
|
|
|
|
|
break;
|
|
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|
|
|
|
|
|
|
|
case STATUS_BAD:
|
|
|
|
|
|
clock_time->flags |= PARSEB_NOSYNC|PARSEB_POWERUP;
|
|
|
|
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
if (t->t_mode == 0)
|
|
|
|
|
|
clock_time->flags |= PARSEB_POSITION;
|
|
|
|
|
|
|
|
|
|
|
|
clock_time->flags |= PARSEB_S_LEAP|PARSEB_S_POSITION;
|
|
|
|
|
|
|
|
|
|
|
|
return CVT_OK;
|
|
|
|
|
|
|
|
|
|
|
|
} /* case 0x41 */
|
|
|
|
|
|
|
|
|
|
|
|
case CMD_RRECVHEALTH:
|
|
|
|
|
|
{
|
|
|
|
|
|
/* TRIMBLE health */
|
|
|
|
|
|
u_char status = mb(0);
|
|
|
|
|
|
|
|
|
|
|
|
switch (status)
|
|
|
|
|
|
{
|
|
|
|
|
|
case 0x00: /* position fixes */
|
|
|
|
|
|
t->t_operable = STATUS_SYNC;
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
|
|
case 0x09: /* 1 satellite */
|
|
|
|
|
|
case 0x0A: /* 2 satellites */
|
|
|
|
|
|
case 0x0B: /* 3 satellites */
|
|
|
|
|
|
t->t_operable = STATUS_UNSAFE;
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
|
t->t_operable = STATUS_BAD;
|
|
|
|
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
|
|
t->t_mode = status;
|
|
|
|
|
|
}
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
|
|
case CMD_RUTCPARAM:
|
|
|
|
|
|
{
|
|
|
|
|
|
l_fp t0t;
|
|
|
|
|
|
unsigned char *lbp;
|
|
|
|
|
|
|
|
|
|
|
|
/* UTC correction data - derive a leap warning */
|
|
|
|
|
|
int tls = t->t_gpsutc = getshort((unsigned char *)&mb(12)); /* current leap correction (GPS-UTC) */
|
|
|
|
|
|
int tlsf = t->t_gpsutcleap = getshort((unsigned char *)&mb(24)); /* new leap correction */
|
|
|
|
|
|
|
|
|
|
|
|
t->t_weekleap = getshort((unsigned char *)&mb(20)); /* week no of leap correction */
|
|
|
|
|
|
if (t->t_weekleap < 990)
|
|
|
|
|
|
t->t_weekleap += 1024;
|
|
|
|
|
|
|
|
|
|
|
|
t->t_dayleap = getshort((unsigned char *)&mb(22)); /* day in week of leap correction */
|
|
|
|
|
|
t->t_week = getshort((unsigned char *)&mb(18)); /* current week no */
|
|
|
|
|
|
if (t->t_week < 990)
|
|
|
|
|
|
t->t_week += 1024;
|
|
|
|
|
|
|
|
|
|
|
|
lbp = (unsigned char *)&mb(14); /* last update time */
|
|
|
|
|
|
if (fetch_ieee754(&lbp, IEEE_SINGLE, &t0t, trim_offsets) != IEEE_OK)
|
|
|
|
|
|
return CVT_FAIL|CVT_BADFMT;
|
|
|
|
|
|
|
|
|
|
|
|
t->t_utcknown = t0t.l_ui != 0;
|
|
|
|
|
|
|
|
|
|
|
|
if ((t->t_utcknown) && /* got UTC information */
|
|
|
|
|
|
(tlsf != tls) && /* something will change */
|
|
|
|
|
|
((t->t_weekleap - t->t_week) < 5)) /* and close in the future */
|
|
|
|
|
|
{
|
|
|
|
|
|
/* generate a leap warning */
|
|
|
|
|
|
if (tlsf > tls)
|
|
|
|
|
|
t->t_leap = ADDSECOND;
|
|
|
|
|
|
else
|
|
|
|
|
|
t->t_leap = DELSECOND;
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
{
|
|
|
|
|
|
t->t_leap = 0;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
|
/* it's validly formed, but we don't care about it! */
|
|
|
|
|
|
break;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
return CVT_SKIP;
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
#else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_TRIMTSIP && !PARSESTREAM) */
|
|
|
|
|
|
int clk_trimtsip_bs;
|
|
|
|
|
|
#endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_TRIMTSIP && !PARSESTREAM) */
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
|
|
* History:
|
|
|
|
|
|
*
|
|
|
|
|
|
* clk_trimtsip.c,v
|
2008-08-18 14:26:05 +00:00
|
|
|
|
* Revision 4.17 2005/04/16 17:32:10 kardel
|
|
|
|
|
|
* update copyright
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.16 2004/11/14 15:29:41 kardel
|
|
|
|
|
|
* support PPSAPI, upgrade Copyright to Berkeley style
|
|
|
|
|
|
*
|
2000-01-28 14:55:50 +00:00
|
|
|
|
* Revision 4.13 1999/11/28 09:13:51 kardel
|
|
|
|
|
|
* RECON_4_0_98F
|
|
|
|
|
|
*
|
1999-12-09 13:01:21 +00:00
|
|
|
|
* Revision 4.12 1999/02/28 13:00:08 kardel
|
|
|
|
|
|
* *** empty log message ***
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.11 1999/02/28 11:47:54 kardel
|
|
|
|
|
|
* (struct trimble): new member t_utcknown
|
|
|
|
|
|
* (cvt_trimtsip): fixed status monitoring, bad receiver states are
|
|
|
|
|
|
* now recognized
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.10 1999/02/27 15:57:15 kardel
|
|
|
|
|
|
* use mmemcpy instead of bcopy
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.9 1999/02/21 12:17:42 kardel
|
|
|
|
|
|
* 4.91f reconcilation
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.8 1998/11/15 20:27:58 kardel
|
|
|
|
|
|
* Release 4.0.73e13 reconcilation
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.7 1998/08/16 18:49:20 kardel
|
|
|
|
|
|
* (cvt_trimtsip): initial kernel capable version (no more floats)
|
|
|
|
|
|
* (clock_trimtsip =): new format name
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.6 1998/08/09 22:26:05 kardel
|
|
|
|
|
|
* Trimble TSIP support
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.5 1998/08/02 10:37:05 kardel
|
|
|
|
|
|
* working TSIP parser
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.4 1998/06/28 16:50:40 kardel
|
|
|
|
|
|
* (getflt): fixed ENDIAN issue
|
|
|
|
|
|
* (getdbl): fixed ENDIAN issue
|
|
|
|
|
|
* (getint): use get_msb_short()
|
|
|
|
|
|
* (cvt_trimtsip): use gpstolfp() for conversion
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.3 1998/06/13 12:07:31 kardel
|
|
|
|
|
|
* fix SYSV clock name clash
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.2 1998/06/12 15:22:30 kardel
|
|
|
|
|
|
* fix prototypes
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.1 1998/05/24 09:39:54 kardel
|
|
|
|
|
|
* implementation of the new IO handling model
|
|
|
|
|
|
*
|
|
|
|
|
|
* Revision 4.0 1998/04/10 19:45:32 kardel
|
|
|
|
|
|
* Start 4.0 release version numbering
|
|
|
|
|
|
*
|
|
|
|
|
|
* from V3 1.8 loginfo deleted 1998/04/11 kardel
|
|
|
|
|
|
*/
|
