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Diffstat (limited to 'contrib/ntp/parseutil/testdcf.c')
-rw-r--r-- | contrib/ntp/parseutil/testdcf.c | 495 |
1 files changed, 495 insertions, 0 deletions
diff --git a/contrib/ntp/parseutil/testdcf.c b/contrib/ntp/parseutil/testdcf.c new file mode 100644 index 0000000..754ff63 --- /dev/null +++ b/contrib/ntp/parseutil/testdcf.c @@ -0,0 +1,495 @@ +/* + * /src/NTP/REPOSITORY/v4/parseutil/testdcf.c,v 3.18 1996/12/01 16:05:04 kardel Exp + * + * testdcf.c,v 3.18 1996/12/01 16:05:04 kardel Exp + * + * simple DCF77 100/200ms pulse test program (via 50Baud serial line) + * + * Copyright (c) 1993,1994,1995,1996, 1998 by Frank Kardel + * Friedrich-Alexander Universität Erlangen-Nürnberg, Germany + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * This program may not be sold or used for profit without prior + * written consent of the author. + */ + +#include <unistd.h> +#include <stdio.h> +#include <fcntl.h> +#include <termios.h> +#include <sys/types.h> +#include <sys/time.h> + +#include "ntp_stdlib.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 occurence) */ +#define DCFB_ALTERNATE 0x0008 /* alternate antenna used */ + +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; + +#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 - 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 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_ALTERNATE; + + return CVT_OK; + } + else + { + /* + * bad format - not for us + */ + printf("%-30s", "*** BAD FORMAT (invalid/parity)"); + return CVT_FAIL|CVT_BADFMT; + } +} + +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 = B50|CS8|CREAD|CLOCAL; +#else + term.c_cflag = B50|CS8|CREAD|CLOCAL|PARENB; +#endif + term.c_iflag = IGNPAR; + term.c_oflag = 0; + term.c_lflag = 0; + + 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 - Copyright (C) 1993-1996, Frank Kardel\n\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; + 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_ALTERNATE) ? "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; +} |