/* $NetBSD: testdcf.c,v 1.6 2020/05/25 20:47:26 christos Exp $ */
/*
* /src/NTP/ntp4-dev/parseutil/testdcf.c,v 4.10 2005/08/06 14:18:43 kardel RELEASE_20050806_A
*
* testdcf.c,v 4.10 2005/08/06 14:18:43 kardel RELEASE_20050806_A
*
* simple DCF77 100/200ms pulse test program (via 50Baud serial line)
*
* Copyright (c) 1995-2015 by Frank Kardel <kardel <AT> ntp.org>
* Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universitaet Erlangen-Nuernberg, Germany
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <config.h>
#include "ntp_stdlib.h"
#include <sys/ioctl.h>
#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <termios.h>
/*
* state flags
*/
#define DCFB_ANNOUNCE 0x0001 /* switch time zone warning (DST switch) */
#define DCFB_DST 0x0002 /* DST in effect */
#define DCFB_LEAP 0x0004 /* LEAP warning (1 hour prior to occurrence) */
#define DCFB_CALLBIT 0x0008 /* "call bit" used to signalize irregularities in the control facilities */
struct clocktime /* clock time broken up from time code */
{
long wday;
long day;
long month;
long year;
long hour;
long minute;
long second;
long usecond;
long utcoffset; /* in minutes */
long flags; /* current clock status */
};
typedef struct clocktime clocktime_t;
static char type(unsigned int);
#define TIMES10(_X_) (((_X_) << 3) + ((_X_) << 1))
/*
* parser related return/error codes
*/
#define CVT_MASK 0x0000000F /* conversion exit code */
#define CVT_NONE 0x00000001 /* format not applicable */
#define CVT_FAIL 0x00000002 /* conversion failed - error code returned */
#define CVT_OK 0x00000004 /* conversion succeeded */
#define CVT_BADFMT 0x00000010 /* general format error - (unparsable) */
/*
* DCF77 raw time code
*
* From "Zur Zeit", Physikalisch-Technische Bundesanstalt (PTB), Braunschweig
* und Berlin, Maerz 1989
*
* Timecode transmission:
* AM:
* time marks are send every second except for the second before the
* next minute mark
* time marks consist of a reduction of transmitter power to 25%
* of the nominal level
* the falling edge is the time indication (on time)
* time marks of a 100ms duration constitute a logical 0
* time marks of a 200ms duration constitute a logical 1
* FM:
* see the spec. (basically a (non-)inverted psuedo random phase shift)
*
* Encoding:
* Second Contents
* 0 - 10 AM: free, FM: 0
* 11 - 14 free
* 15 R - "call bit" used to signalize irregularities in the control facilities
* (until 2003 indicated transmission via alternate antenna)
* 16 A1 - expect zone change (1 hour before)
* 17 - 18 Z1,Z2 - time zone
* 0 0 illegal
* 0 1 MEZ (MET)
* 1 0 MESZ (MED, MET DST)
* 1 1 illegal
* 19 A2 - expect leap insertion/deletion (1 hour before)
* 20 S - start of time code (1)
* 21 - 24 M1 - BCD (lsb first) Minutes
* 25 - 27 M10 - BCD (lsb first) 10 Minutes
* 28 P1 - Minute Parity (even)
* 29 - 32 H1 - BCD (lsb first) Hours
* 33 - 34 H10 - BCD (lsb first) 10 Hours
* 35 P2 - Hour Parity (even)
* 36 - 39 D1 - BCD (lsb first) Days
* 40 - 41 D10 - BCD (lsb first) 10 Days
* 42 - 44 DW - BCD (lsb first) day of week (1: Monday -> 7: Sunday)
* 45 - 49 MO - BCD (lsb first) Month
* 50 MO0 - 10 Months
* 51 - 53 Y1 - BCD (lsb first) Years
* 54 - 57 Y10 - BCD (lsb first) 10 Years
* 58 P3 - Date Parity (even)
* 59 - usually missing (minute indication), except for leap insertion
*/
static char revision[] = "4.10";
static struct rawdcfcode
{
char offset; /* start bit */
} rawdcfcode[] =
{
{ 0 }, { 15 }, { 16 }, { 17 }, { 19 }, { 20 }, { 21 }, { 25 }, { 28 }, { 29 },
{ 33 }, { 35 }, { 36 }, { 40 }, { 42 }, { 45 }, { 49 }, { 50 }, { 54 }, { 58 }, { 59 }
};
#define DCF_M 0
#define DCF_R 1
#define DCF_A1 2
#define DCF_Z 3
#define DCF_A2 4
#define DCF_S 5
#define DCF_M1 6
#define DCF_M10 7
#define DCF_P1 8
#define DCF_H1 9
#define DCF_H10 10
#define DCF_P2 11
#define DCF_D1 12
#define DCF_D10 13
#define DCF_DW 14
#define DCF_MO 15
#define DCF_MO0 16
#define DCF_Y1 17
#define DCF_Y10 18
#define DCF_P3 19
static struct partab
{
char offset; /* start bit of parity field */
} partab[] =
{
{ 21 }, { 29 }, { 36 }, { 59 }
};
#define DCF_P_P1 0
#define DCF_P_P2 1
#define DCF_P_P3 2
#define DCF_Z_MET 0x2
#define DCF_Z_MED 0x1
static unsigned long
ext_bf(
register unsigned char *buf,
register int idx
)
{
register unsigned long sum = 0;
register int i, first;
first = rawdcfcode[idx].offset;
for (i = rawdcfcode[idx+1].offset - 1; i >= first; i--)
{
sum <<= 1;
sum |= (buf[i] != '-');
}
return sum;
}
static unsigned
pcheck(
register unsigned char *buf,
register int idx
)
{
register int i,last;
register unsigned psum = 1;
last = partab[idx+1].offset;
for (i = partab[idx].offset; i < last; i++)
psum ^= (buf[i] != '-');
return psum;
}
static unsigned long
convert_rawdcf(
register unsigned char *buffer,
register int size,
register clocktime_t *clock_time
)
{
if (size < 57)
{
printf("%-30s", "*** INCOMPLETE");
return CVT_NONE;
}
/*
* check Start and Parity bits
*/
if ((ext_bf(buffer, DCF_S) == 1) &&
pcheck(buffer, DCF_P_P1) &&
pcheck(buffer, DCF_P_P2) &&
pcheck(buffer, DCF_P_P3))
{
/*
* buffer OK
*/
clock_time->flags = 0;
clock_time->usecond= 0;
clock_time->second = 0;
clock_time->minute = ext_bf(buffer, DCF_M10);
clock_time->minute = TIMES10(clock_time->minute) + ext_bf(buffer, DCF_M1);
clock_time->hour = ext_bf(buffer, DCF_H10);
clock_time->hour = TIMES10(clock_time->hour) + ext_bf(buffer, DCF_H1);
clock_time->day = ext_bf(buffer, DCF_D10);
clock_time->day = TIMES10(clock_time->day) + ext_bf(buffer, DCF_D1);
clock_time->month = ext_bf(buffer, DCF_MO0);
clock_time->month = TIMES10(clock_time->month) + ext_bf(buffer, DCF_MO);
clock_time->year = ext_bf(buffer, DCF_Y10);
clock_time->year = TIMES10(clock_time->year) + ext_bf(buffer, DCF_Y1);
clock_time->wday = ext_bf(buffer, DCF_DW);
switch (ext_bf(buffer, DCF_Z))
{
case DCF_Z_MET:
clock_time->utcoffset = -60;
break;
case DCF_Z_MED:
clock_time->flags |= DCFB_DST;
clock_time->utcoffset = -120;
break;
default:
printf("%-30s", "*** BAD TIME ZONE");
return CVT_FAIL|CVT_BADFMT;
}
if (ext_bf(buffer, DCF_A1))
clock_time->flags |= DCFB_ANNOUNCE;
if (ext_bf(buffer, DCF_A2))
clock_time->flags |= DCFB_LEAP;
if (ext_bf(buffer, DCF_R))
clock_time->flags |= DCFB_CALLBIT;
return CVT_OK;
}
else
{
/*
* bad format - not for us
*/
printf("%-30s", "*** BAD FORMAT (invalid/parity)");
return CVT_FAIL|CVT_BADFMT;
}
}
static char
type(
unsigned int c
)
{
c ^= 0xFF;
return (c >= 0xF);
}
static const char *wday[8] =
{
"??",
"Mo",
"Tu",
"We",
"Th",
"Fr",
"Sa",
"Su"
};
static char pat[] = "-\\|/";
#define LINES (24-2) /* error lines after which the two headlines are repeated */
int
main(
int argc,
char *argv[]
)
{
if ((argc != 2) && (argc != 3))
{
fprintf(stderr, "usage: %s [-f|-t|-ft|-tf] <device>\n", argv[0]);
exit(1);
}
else
{
unsigned char c;
char *file;
int fd;
int offset = 15;
int trace = 0;
int errs = LINES+1;
/*
* SIMPLE(!) argument "parser"
*/
if (argc == 3)
{
if (strcmp(argv[1], "-f") == 0)
offset = 0;
if (strcmp(argv[1], "-t") == 0)
trace = 1;
if ((strcmp(argv[1], "-ft") == 0) ||
(strcmp(argv[1], "-tf") == 0))
{
offset = 0;
trace = 1;
}
file = argv[2];
}
else
{
file = argv[1];
}
fd = open(file, O_RDONLY);
if (fd == -1)
{
perror(file);
exit(1);
}
else
{
int i;
#ifdef TIOCM_RTS
int on = TIOCM_RTS;
#endif
struct timeval t, tt, tlast;
char buf[61];
clocktime_t clock_time;
struct termios term;
int rtc = CVT_NONE;
if (tcgetattr(fd, &term) == -1)
{
perror("tcgetattr");
exit(1);
}
memset(term.c_cc, 0, sizeof(term.c_cc));
term.c_cc[VMIN] = 1;
#ifdef NO_PARENB_IGNPAR /* Was: defined(SYS_IRIX4) || defined (SYS_IRIX5) */
/* somehow doesn't grok PARENB & IGNPAR (mj) */
term.c_cflag = CS8|CREAD|CLOCAL;
#else
term.c_cflag = CS8|CREAD|CLOCAL|PARENB;
#endif
term.c_iflag = IGNPAR;
term.c_oflag = 0;
term.c_lflag = 0;
cfsetispeed(&term, B50);
cfsetospeed(&term, B50);
if (tcsetattr(fd, TCSANOW, &term) == -1)
{
perror("tcsetattr");
exit(1);
}
#ifdef I_POP
while (ioctl(fd, I_POP, 0) == 0)
;
#endif
#if defined(TIOCMBIC) && defined(TIOCM_RTS)
if (ioctl(fd, TIOCMBIC, (caddr_t)&on) == -1)
{
perror("TIOCM_RTS");
}
#endif
printf(" DCF77 monitor %s - Copyright (C) 1993-2005, Frank Kardel\n\n", revision);
clock_time.hour = 0;
clock_time.minute = 0;
clock_time.day = 0;
clock_time.wday = 0;
clock_time.month = 0;
clock_time.year = 0;
clock_time.flags = 0;
buf[60] = '\0';
for ( i = 0; i < 60; i++)
buf[i] = '.';
gettimeofday(&tlast, 0L);
i = 0;
while (read(fd, &c, 1) == 1)
{
gettimeofday(&t, 0L);
tt = t;
t.tv_sec -= tlast.tv_sec;
t.tv_usec -= tlast.tv_usec;
if (t.tv_usec < 0)
{
t.tv_usec += 1000000;
t.tv_sec -= 1;
}
if (errs > LINES)
{
printf(" %s", &"PTB private....RADMLSMin....PHour..PMDay..DayMonthYear....P\n"[offset]);
printf(" %s", &"---------------RADMLS1248124P124812P1248121241248112481248P\n"[offset]);
errs = 0;
}
if (t.tv_sec > 1 ||
(t.tv_sec == 1 &&
t.tv_usec > 500000))
{
printf("%c %.*s ", pat[i % (sizeof(pat)-1)], 59 - offset, &buf[offset]);
if ((rtc = convert_rawdcf((unsigned char *)buf, i, &clock_time)) != CVT_OK)
{
printf("\n");
clock_time.hour = 0;
clock_time.minute = 0;
clock_time.day = 0;
clock_time.wday = 0;
clock_time.month = 0;
clock_time.year = 0;
clock_time.flags = 0;
errs++;
}
if (((c^0xFF)+1) & (c^0xFF))
buf[0] = '?';
else
buf[0] = type(c) ? '#' : '-';
for ( i = 1; i < 60; i++)
buf[i] = '.';
i = 0;
}
else
{
if (((c^0xFF)+1) & (c^0xFF))
buf[i] = '?';
else
buf[i] = type(c) ? '#' : '-';
printf("%c %.*s ", pat[i % (sizeof(pat)-1)], 59 - offset, &buf[offset]);
}
if (rtc == CVT_OK)
{
printf("%s, %2d:%02d:%02d, %d.%02d.%02d, <%s%s%s%s>",
wday[clock_time.wday],
(int)clock_time.hour, (int)clock_time.minute, (int)i, (int)clock_time.day, (int)clock_time.month,
(int)clock_time.year,
(clock_time.flags & DCFB_CALLBIT) ? "R" : "_",
(clock_time.flags & DCFB_ANNOUNCE) ? "A" : "_",
(clock_time.flags & DCFB_DST) ? "D" : "_",
(clock_time.flags & DCFB_LEAP) ? "L" : "_"
);
if (trace && (i == 0))
{
printf("\n");
errs++;
}
}
printf("\r");
if (i < 60)
{
i++;
}
tlast = tt;
fflush(stdout);
}
close(fd);
}
}
return 0;
}
/*
* History:
*
* testdcf.c,v
* Revision 4.10 2005/08/06 14:18:43 kardel
* cleanup warnings
*
* Revision 4.9 2005/08/06 14:14:38 kardel
* document revision on startup
*
* Revision 4.8 2005/08/06 14:10:08 kardel
* fix setting of baud rate
*
* Revision 4.7 2005/04/16 17:32:10 kardel
* update copyright
*
* Revision 4.6 2004/11/14 15:29:42 kardel
* support PPSAPI, upgrade Copyright to Berkeley style
*
*/
