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/*
* Trimble SV6 clock support - several collected codepieces
*
* Copyright Frank Kardel <kardel@ntp.org>
* Copyright the NTPsec project contributors
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "config.h"
#include "ntp_fp.h"
#include "ntp_calendar.h"
#include "parse.h"
#include "ntp_stdlib.h"
/* 0000000000111111111122222222223333333 / char
* 0123456789012345678901234567890123456 \ posn
* >RTMhhmmssdddDDMMYYYYoodnnvrrrrr;*xx< Actual
* ----33445566600112222BB7__-_____--99- Parse
* >RTM 1 ;* <", Check
*/
#define hexval(x) (('0' <= (x) && (x) <= '9') ? (x) - '0' : \
('a' <= (x) && (x) <= 'f') ? (x) - 'a' + 10 : \
('A' <= (x) && (x) <= 'F') ? (x) - 'A' + 10 : \
-1)
#define O_USEC O_WDAY
#define O_GPSFIX O_FLAGS
#define O_CHKSUM O_UTCHOFFSET
static struct format trimsv6_fmt =
{ { { 13, 2 }, {15, 2}, { 17, 4}, /* Day, Month, Year */
{ 4, 2 }, { 6, 2}, { 8, 2}, /* Hour, Minute, Second */
{ 10, 3 }, {23, 1}, { 0, 0}, /* uSec, FIXes (WeekDAY, FLAGS, ZONE) */
{ 34, 2 }, { 0, 0}, { 21, 2}, /* cksum, -, utcS (UTC[HMS]OFFSET) */
},
(const unsigned char *)">RTM 1 ;* <",
0
};
static parse_cvt_fnc_t cvt_trimtaip;
static parse_inp_fnc_t inp_trimtaip;
clockformat_t clock_trimtaip =
{
inp_trimtaip, /* no input handling */
cvt_trimtaip, /* Trimble conversion */
pps_one, /* easy PPS monitoring */
(void *)&trimsv6_fmt, /* conversion configuration */
"Trimble TAIP",
37, /* string buffer */
0 /* no private data */
};
/* parse_cvt_fnc_t cvt_trimtaip */
static unsigned long
cvt_trimtaip(
unsigned char *buffer,
int size,
struct format *format,
clocktime_t *clock_time,
void *local
)
{
long gpsfix;
uint8_t calc_csum = 0;
long recv_csum;
int i;
UNUSED_ARG(size);
UNUSED_ARG(local);
if (!Strok(buffer, format->fixed_string)) return CVT_NONE;
#define OFFS(x) format->field_offsets[(x)].offset
#define STOI(x, y) \
Stoi(&buffer[OFFS(x)], y, \
format->field_offsets[(x)].length)
if ( STOI(O_DAY, &clock_time->day) ||
STOI(O_MONTH, &clock_time->month) ||
STOI(O_YEAR, &clock_time->year) ||
STOI(O_HOUR, &clock_time->hour) ||
STOI(O_MIN, &clock_time->minute) ||
STOI(O_SEC, &clock_time->second) ||
STOI(O_USEC, &clock_time->usecond)||
STOI(O_GPSFIX, &gpsfix)
) return CVT_FAIL|CVT_BADFMT;
clock_time->usecond *= 1000;
/* Check that the checksum is right */
for (i=OFFS(O_CHKSUM)-1; i >= 0; i--) calc_csum ^= buffer[i];
recv_csum = (hexval(buffer[OFFS(O_CHKSUM)]) << 4) |
hexval(buffer[OFFS(O_CHKSUM)+1]);
if (recv_csum < 0) return CVT_FAIL|CVT_BADTIME;
if (((uint8_t) recv_csum) != calc_csum) return CVT_FAIL|CVT_BADTIME;
clock_time->utcoffset = 0;
/* What should flags be set to ? */
clock_time->flags = PARSEB_UTC;
/* if the current GPS fix is 9 (unknown), reject */
if (0 > gpsfix || gpsfix > 9) clock_time->flags |= PARSEB_POWERUP;
return CVT_OK;
}
/*
* parse_inp_fnc_t inp_trimtaip
*
* grab data from input stream
*/
static unsigned long
inp_trimtaip(
parse_t *parseio,
char ch,
timestamp_t *tstamp
)
{
unsigned int rtc;
parseprintf(DD_PARSE, ("inp_trimtaip(0x%lx, 0x%x, ...)\n",
(unsigned long)parseio, (unsigned)ch));
switch (ch)
{
case '>':
parseprintf(DD_PARSE, ("inp_trimptaip: START seen\n"));
parseio->parse_index = 1;
parseio->parse_data[0] = ch;
parseio->parse_dtime.parse_stime = *tstamp; /* collect timestamp */
return PARSE_INP_SKIP;
case '<':
parseprintf(DD_PARSE, ("inp_trimtaip: END seen\n"));
if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP)
return parse_end(parseio);
else
return rtc;
default:
return parse_addchar(parseio, ch);
}
}
/*
* History:
*
* clk_trimtaip.c,v
* Revision 4.11 2005/04/16 17:32:10 kardel
* update copyright
*
* Revision 4.10 2004/11/14 15:29:41 kardel
* support PPSAPI, upgrade Copyright to Berkeley style
*
* Revision 4.7 1999/11/28 09:13:51 kardel
* RECON_4_0_98F
*
* Revision 4.6 1998/08/16 18:46:27 kardel
* (clock_trimtaip =): changed format name
*
* Revision 4.5 1998/06/14 21:09:38 kardel
* Sun acc cleanup
*
* Revision 4.4 1998/06/13 12:06:57 kardel
* fix SYSV clock name clash
*
* Revision 4.3 1998/06/12 15:22:29 kardel
* fix prototypes
*
* Revision 4.2 1998/06/12 09:13:26 kardel
* conditional compile macros fixed
* printf prototype
*
* Revision 4.1 1998/05/24 09:39:54 kardel
* implementation of the new IO handling model
*
* Revision 4.0 1998/04/10 19:45:31 kardel
* Start 4.0 release version numbering
*
* from V3 1.4 log info deleted 1998/04/11 kardel
*/
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