494 lines
11 KiB
C
494 lines
11 KiB
C
/*
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* /src/NTP/REPOSITORY/v4/parseutil/testdcf.c,v 3.18 1996/12/01 16:05:04 kardel Exp
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*
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* testdcf.c,v 3.18 1996/12/01 16:05:04 kardel Exp
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*
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* simple DCF77 100/200ms pulse test program (via 50Baud serial line)
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*
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* Copyright (c) 1993,1994,1995,1996, 1998 by Frank Kardel
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* Friedrich-Alexander Universität Erlangen-Nürnberg, Germany
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* This program may not be sold or used for profit without prior
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* written consent of the author.
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*/
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#include "ntp_stdlib.h"
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#include <unistd.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <termios.h>
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/*
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* state flags
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*/
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#define DCFB_ANNOUNCE 0x0001 /* switch time zone warning (DST switch) */
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#define DCFB_DST 0x0002 /* DST in effect */
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#define DCFB_LEAP 0x0004 /* LEAP warning (1 hour prior to occurrence) */
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#define DCFB_ALTERNATE 0x0008 /* alternate antenna used */
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struct clocktime /* clock time broken up from time code */
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{
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long wday;
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long day;
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long month;
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long year;
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long hour;
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long minute;
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long second;
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long usecond;
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long utcoffset; /* in minutes */
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long flags; /* current clock status */
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};
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typedef struct clocktime clocktime_t;
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#define TIMES10(_X_) (((_X_) << 3) + ((_X_) << 1))
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/*
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* parser related return/error codes
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*/
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#define CVT_MASK 0x0000000F /* conversion exit code */
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#define CVT_NONE 0x00000001 /* format not applicable */
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#define CVT_FAIL 0x00000002 /* conversion failed - error code returned */
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#define CVT_OK 0x00000004 /* conversion succeeded */
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#define CVT_BADFMT 0x00000010 /* general format error - (unparsable) */
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/*
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* DCF77 raw time code
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*
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* From "Zur Zeit", Physikalisch-Technische Bundesanstalt (PTB), Braunschweig
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* und Berlin, Maerz 1989
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*
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* Timecode transmission:
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* AM:
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* time marks are send every second except for the second before the
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* next minute mark
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* time marks consist of a reduction of transmitter power to 25%
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* of the nominal level
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* the falling edge is the time indication (on time)
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* time marks of a 100ms duration constitute a logical 0
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* time marks of a 200ms duration constitute a logical 1
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* FM:
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* see the spec. (basically a (non-)inverted psuedo random phase shift)
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*
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* Encoding:
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* Second Contents
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* 0 - 10 AM: free, FM: 0
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* 11 - 14 free
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* 15 R - alternate antenna
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* 16 A1 - expect zone change (1 hour before)
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* 17 - 18 Z1,Z2 - time zone
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* 0 0 illegal
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* 0 1 MEZ (MET)
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* 1 0 MESZ (MED, MET DST)
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* 1 1 illegal
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* 19 A2 - expect leap insertion/deletion (1 hour before)
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* 20 S - start of time code (1)
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* 21 - 24 M1 - BCD (lsb first) Minutes
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* 25 - 27 M10 - BCD (lsb first) 10 Minutes
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* 28 P1 - Minute Parity (even)
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* 29 - 32 H1 - BCD (lsb first) Hours
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* 33 - 34 H10 - BCD (lsb first) 10 Hours
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* 35 P2 - Hour Parity (even)
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* 36 - 39 D1 - BCD (lsb first) Days
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* 40 - 41 D10 - BCD (lsb first) 10 Days
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* 42 - 44 DW - BCD (lsb first) day of week (1: Monday -> 7: Sunday)
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* 45 - 49 MO - BCD (lsb first) Month
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* 50 MO0 - 10 Months
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* 51 - 53 Y1 - BCD (lsb first) Years
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* 54 - 57 Y10 - BCD (lsb first) 10 Years
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* 58 P3 - Date Parity (even)
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* 59 - usually missing (minute indication), except for leap insertion
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*/
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static struct rawdcfcode
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{
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char offset; /* start bit */
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} rawdcfcode[] =
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{
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{ 0 }, { 15 }, { 16 }, { 17 }, { 19 }, { 20 }, { 21 }, { 25 }, { 28 }, { 29 },
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{ 33 }, { 35 }, { 36 }, { 40 }, { 42 }, { 45 }, { 49 }, { 50 }, { 54 }, { 58 }, { 59 }
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};
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#define DCF_M 0
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#define DCF_R 1
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#define DCF_A1 2
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#define DCF_Z 3
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#define DCF_A2 4
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#define DCF_S 5
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#define DCF_M1 6
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#define DCF_M10 7
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#define DCF_P1 8
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#define DCF_H1 9
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#define DCF_H10 10
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#define DCF_P2 11
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#define DCF_D1 12
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#define DCF_D10 13
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#define DCF_DW 14
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#define DCF_MO 15
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#define DCF_MO0 16
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#define DCF_Y1 17
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#define DCF_Y10 18
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#define DCF_P3 19
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static struct partab
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{
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char offset; /* start bit of parity field */
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} partab[] =
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{
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{ 21 }, { 29 }, { 36 }, { 59 }
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};
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#define DCF_P_P1 0
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#define DCF_P_P2 1
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#define DCF_P_P3 2
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#define DCF_Z_MET 0x2
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#define DCF_Z_MED 0x1
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static unsigned long
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ext_bf(
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register unsigned char *buf,
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register int idx
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)
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{
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register unsigned long sum = 0;
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register int i, first;
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first = rawdcfcode[idx].offset;
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for (i = rawdcfcode[idx+1].offset - 1; i >= first; i--)
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{
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sum <<= 1;
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sum |= (buf[i] != '-');
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}
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return sum;
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}
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static unsigned
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pcheck(
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register unsigned char *buf,
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register int idx
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)
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{
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register int i,last;
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register unsigned psum = 1;
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last = partab[idx+1].offset;
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for (i = partab[idx].offset; i < last; i++)
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psum ^= (buf[i] != '-');
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return psum;
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}
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static unsigned long
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convert_rawdcf(
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register unsigned char *buffer,
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register int size,
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register clocktime_t *clock_time
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)
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{
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if (size < 57)
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{
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printf("%-30s", "*** INCOMPLETE");
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return CVT_NONE;
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}
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/*
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* check Start and Parity bits
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*/
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if ((ext_bf(buffer, DCF_S) == 1) &&
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pcheck(buffer, DCF_P_P1) &&
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pcheck(buffer, DCF_P_P2) &&
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pcheck(buffer, DCF_P_P3))
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{
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/*
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* buffer OK
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*/
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clock_time->flags = 0;
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clock_time->usecond= 0;
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clock_time->second = 0;
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clock_time->minute = ext_bf(buffer, DCF_M10);
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clock_time->minute = TIMES10(clock_time->minute) + ext_bf(buffer, DCF_M1);
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clock_time->hour = ext_bf(buffer, DCF_H10);
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clock_time->hour = TIMES10(clock_time->hour) + ext_bf(buffer, DCF_H1);
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clock_time->day = ext_bf(buffer, DCF_D10);
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clock_time->day = TIMES10(clock_time->day) + ext_bf(buffer, DCF_D1);
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clock_time->month = ext_bf(buffer, DCF_MO0);
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clock_time->month = TIMES10(clock_time->month) + ext_bf(buffer, DCF_MO);
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clock_time->year = ext_bf(buffer, DCF_Y10);
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clock_time->year = TIMES10(clock_time->year) + ext_bf(buffer, DCF_Y1);
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clock_time->wday = ext_bf(buffer, DCF_DW);
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switch (ext_bf(buffer, DCF_Z))
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{
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case DCF_Z_MET:
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clock_time->utcoffset = -60;
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break;
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case DCF_Z_MED:
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clock_time->flags |= DCFB_DST;
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clock_time->utcoffset = -120;
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break;
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default:
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printf("%-30s", "*** BAD TIME ZONE");
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return CVT_FAIL|CVT_BADFMT;
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}
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if (ext_bf(buffer, DCF_A1))
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clock_time->flags |= DCFB_ANNOUNCE;
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if (ext_bf(buffer, DCF_A2))
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clock_time->flags |= DCFB_LEAP;
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if (ext_bf(buffer, DCF_R))
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clock_time->flags |= DCFB_ALTERNATE;
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return CVT_OK;
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}
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else
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{
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/*
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* bad format - not for us
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*/
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printf("%-30s", "*** BAD FORMAT (invalid/parity)");
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return CVT_FAIL|CVT_BADFMT;
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}
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}
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char
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type(
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unsigned int c
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)
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{
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c ^= 0xFF;
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return (c > 0xF);
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}
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static const char *wday[8] =
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{
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"??",
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"Mo",
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"Tu",
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"We",
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"Th",
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"Fr",
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"Sa",
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"Su"
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};
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static char pat[] = "-\\|/";
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#define LINES (24-2) /* error lines after which the two headlines are repeated */
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int
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main(
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int argc,
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char *argv[]
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)
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{
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if ((argc != 2) && (argc != 3))
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{
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fprintf(stderr, "usage: %s [-f|-t|-ft|-tf] <device>\n", argv[0]);
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exit(1);
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}
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else
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{
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unsigned char c;
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char *file;
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int fd;
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int offset = 15;
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int trace = 0;
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int errs = LINES+1;
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/*
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* SIMPLE(!) argument "parser"
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*/
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if (argc == 3)
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{
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if (strcmp(argv[1], "-f") == 0)
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offset = 0;
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if (strcmp(argv[1], "-t") == 0)
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trace = 1;
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if ((strcmp(argv[1], "-ft") == 0) ||
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(strcmp(argv[1], "-tf") == 0))
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{
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offset = 0;
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trace = 1;
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}
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file = argv[2];
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}
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else
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{
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file = argv[1];
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}
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fd = open(file, O_RDONLY);
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if (fd == -1)
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{
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perror(file);
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exit(1);
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}
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else
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{
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int i;
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#ifdef TIOCM_RTS
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int on = TIOCM_RTS;
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#endif
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struct timeval t, tt, tlast;
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char buf[61];
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clocktime_t clock_time;
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struct termios term;
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int rtc = CVT_NONE;
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if (tcgetattr(fd, &term) == -1)
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{
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perror("tcgetattr");
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exit(1);
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}
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memset(term.c_cc, 0, sizeof(term.c_cc));
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term.c_cc[VMIN] = 1;
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#ifdef NO_PARENB_IGNPAR /* Was: defined(SYS_IRIX4) || defined (SYS_IRIX5) */
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/* somehow doesn't grok PARENB & IGNPAR (mj) */
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term.c_cflag = B50|CS8|CREAD|CLOCAL;
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#else
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term.c_cflag = B50|CS8|CREAD|CLOCAL|PARENB;
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#endif
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term.c_iflag = IGNPAR;
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term.c_oflag = 0;
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term.c_lflag = 0;
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if (tcsetattr(fd, TCSANOW, &term) == -1)
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{
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perror("tcsetattr");
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exit(1);
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}
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#ifdef I_POP
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while (ioctl(fd, I_POP, 0) == 0)
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;
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#endif
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#if defined(TIOCMBIC) && defined(TIOCM_RTS)
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if (ioctl(fd, TIOCMBIC, (caddr_t)&on) == -1)
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{
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perror("TIOCM_RTS");
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}
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#endif
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printf(" DCF77 monitor - Copyright (C) 1993-1996, Frank Kardel\n\n");
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clock_time.hour = 0;
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clock_time.minute = 0;
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clock_time.day = 0;
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clock_time.wday = 0;
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clock_time.month = 0;
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clock_time.year = 0;
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clock_time.flags = 0;
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buf[60] = '\0';
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for ( i = 0; i < 60; i++)
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buf[i] = '.';
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gettimeofday(&tlast, 0L);
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i = 0;
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while (read(fd, &c, 1) == 1)
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{
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gettimeofday(&t, 0L);
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tt = t;
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t.tv_sec -= tlast.tv_sec;
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t.tv_usec -= tlast.tv_usec;
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if (t.tv_usec < 0)
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{
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t.tv_usec += 1000000;
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t.tv_sec -= 1;
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}
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if (errs > LINES)
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{
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printf(" %s", &"PTB private....RADMLSMin....PHour..PMDay..DayMonthYear....P\n"[offset]);
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printf(" %s", &"---------------RADMLS1248124P124812P1248121241248112481248P\n"[offset]);
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errs = 0;
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}
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if (t.tv_sec > 1 ||
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(t.tv_sec == 1 &&
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t.tv_usec > 500000))
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{
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printf("%c %.*s ", pat[i % (sizeof(pat)-1)], 59 - offset, &buf[offset]);
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if ((rtc = convert_rawdcf((unsigned char *)buf, i, &clock_time)) != CVT_OK)
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{
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printf("\n");
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clock_time.hour = 0;
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clock_time.minute = 0;
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clock_time.day = 0;
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clock_time.wday = 0;
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clock_time.month = 0;
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clock_time.year = 0;
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clock_time.flags = 0;
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errs++;
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}
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if (((c^0xFF)+1) & (c^0xFF))
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buf[0] = '?';
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else
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buf[0] = type(c) ? '#' : '-';
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for ( i = 1; i < 60; i++)
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buf[i] = '.';
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i = 0;
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}
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else
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{
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if (((c^0xFF)+1) & (c^0xFF))
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buf[i] = '?';
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else
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buf[i] = type(c) ? '#' : '-';
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printf("%c %.*s ", pat[i % (sizeof(pat)-1)], 59 - offset, &buf[offset]);
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}
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if (rtc == CVT_OK)
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{
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printf("%s, %2d:%02d:%02d, %d.%02d.%02d, <%s%s%s%s>",
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wday[clock_time.wday],
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(int)clock_time.hour, (int)clock_time.minute, (int)i, (int)clock_time.day, (int)clock_time.month,
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(int)clock_time.year,
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(clock_time.flags & DCFB_ALTERNATE) ? "R" : "_",
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(clock_time.flags & DCFB_ANNOUNCE) ? "A" : "_",
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(clock_time.flags & DCFB_DST) ? "D" : "_",
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(clock_time.flags & DCFB_LEAP) ? "L" : "_"
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);
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if (trace && (i == 0))
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{
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printf("\n");
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errs++;
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}
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}
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printf("\r");
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if (i < 60)
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{
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i++;
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}
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tlast = tt;
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fflush(stdout);
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}
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close(fd);
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}
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}
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return 0;
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}
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