408 lines
14 KiB
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408 lines
14 KiB
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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML Strict//EN">
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<TITLE>NTP PARSE clock data formats</TITLE>
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<h1>NTP PARSE clock data formats</h1>
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<p>The parse driver currently supports several clocks with different
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query mechanisms. In order for you to find a sample that might be
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similar to a clock you might want to integrate into parse i'll sum
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up the major features of the clocks (this information is distributed
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in the parse/clk_*.c and ntpd/refclock_parse.c files).
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<hr>
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<h2>Meinberg clocks</h2>
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<pre>
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Meinberg: start=<STX>, end=<ETX>, sync on start
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pattern="\2D: . . ;T: ;U: . . ; \3"
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pattern="\2 . . ; ; : : ; \3"
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pattern="\2 . . ; ; : : ; : ; ; . . "
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</pre>
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<p>
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Meinberg is a german manufacturer of time code receivers. Those clocks
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have a pretty common output format in the stock version. In order to
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support NTP Meinberg was so kind to produce some special versions of
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the firmware for the use with NTP. So, if you are going to use a
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Meinberg clock please ask whether there is a special Uni Erlangen
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version.
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You can reach <A HREF="http://www.meinberg.de/">Meinberg</A> via the Web.
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Information can also be ordered via eMail from <A HREF="mailto: info@meinberg.de">info@meinberg.de</A>
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<p>
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General characteristics:
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<br>
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Meinberg clocks primarily output pulse per second and a describing
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ASCII string. This string can be produced in two modes. either upon
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the reception of a question mark or every second. NTP uses the latter
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mechanism. The DCF77 variants have a pretty good relationship between
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RS232 time code and the PPS signal while the GPS receiver has no fixed
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timeing between the datagram and the pulse (you need to use PPS with
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GPS!) on DCF77 you might get away without the PPS signal.
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<pre>
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The preferred tty setting for Meinberg is:
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CFLAG (B9600|CS7|PARENB|CREAD|HUPCL)
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IFLAG (IGNBRK|IGNPAR|ISTRIP)
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OFLAG 0
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LFLAG 0
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</pre>
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<pre>
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The tty setting for Meinberg GPS 166/167 receivers is:
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CFLAG (B19200|CS8|PARENB|CREAD|HUPCL)
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IFLAG (IGNBRK|IGNPAR|ISTRIP)
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OFLAG 0
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LFLAG 0
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</pre>
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<p>
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The clock is run at datagram once per second.
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Stock dataformat is:
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<pre>
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<STX>D:<dd>.<mm>.<yy>;T:<w>;U:<hh>:<mm>:<ss>;<S><F><D><A><ETX>
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pos: 0 00 00 0 00 0 11 111 1 111 12 2 22 2 22 2 2 2 3 3 3
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1 23 45 6 78 9 01 234 5 678 90 1 23 4 56 7 8 9 0 1 2
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<STX> = '\002' ASCII start of text
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<ETX> = '\003' ASCII end of text
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<dd>,<mm>,<yy> = day, month, year(2 digits!!)
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<w> = day of week (sunday= 0)
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<hh>,<mm>,<ss> = hour, minute, second
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<S> = '#' if never synced since powerup else ' ' for DCF U/A 31
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'#' if not PZF sychronisation available else ' ' for PZF 535
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<F> = '*' if time comes from internal quartz else ' '
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<D> = 'S' if daylight saving time is active else ' '
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<D> = 'U' if UTC time code is deliverd else ' '
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<A> = '!' during the hour preceeding an daylight saving time
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start/end change
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<A> = 'A' if a leap second is announced
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</pre>
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<pre>
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<STX><dd>.<mm>.<yy>; <w>; <hh>:<mm>:<ss>; <U><S><F><D><A><L><R><ETX>
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pos: 0 00 0 00 0 00 11 1 11 11 1 11 2 22 22 2 2 2 2 2 3 3 3
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1 23 4 56 7 89 01 2 34 56 7 89 0 12 34 5 6 7 8 9 0 1 2
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<STX> = '\002' ASCII start of text
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<ETX> = '\003' ASCII end of text
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<dd>,<mm>,<yy> = day, month, year(2 digits!!)
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<w> = day of week (sunday= 0)
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<hh>,<mm>,<ss> = hour, minute, second
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<U> = 'U' UTC time display
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<S> = '#' if never synced since powerup else ' ' for DCF U/A 31
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'#' if not PZF sychronisation available else ' ' for PZF 535
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<F> = '*' if time comes from internal quartz else ' '
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<D> = 'S' if daylight saving time is active else ' '
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<A> = '!' during the hour preceeding an daylight saving time
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start/end change
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<L> = 'A' LEAP second announcement
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<R> = 'R' alternate antenna
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</pre>
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<p>Meinberg GPS166 receiver
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<br>
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You must get the Uni-Erlangen firmware for the GPS receiver support
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to work to full satisfaction !
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<pre>
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<STX><dd>.<mm>.<yy>; <w>; <hh>:<mm>:<ss>; <+/-><00:00>; <U><S><F><D><A><L><R><L>; <position...><ETX>
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*
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000000000111111111122222222223333333333444444444455555555556666666
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123456789012345678901234567890123456789012345678901234567890123456
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\x0209.07.93; 5; 08:48:26; +00:00; ; 49.5736N 11.0280E 373m\x03
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*
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<STX> = '\002' ASCII start of text
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<ETX> = '\003' ASCII end of text
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<dd>,<mm>,<yy> = day, month, year(2 digits!!)
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<w> = day of week (sunday= 0)
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<hh>,<mm>,<ss> = hour, minute, second
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<+/->,<00:00> = offset to UTC
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<S> = '#' if never synced since powerup else ' ' for DCF U/A 31
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'#' if not PZF sychronisation available else ' ' for PZF 535
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<U> = 'U' UTC time display
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<F> = '*' if time comes from internal quartz else ' '
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<D> = 'S' if daylight saving time is active else ' '
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<A> = '!' during the hour preceeding an daylight saving time
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start/end change
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<L> = 'A' LEAP second announcement
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<R> = 'R' alternate antenna (reminiscent of PZF535) usually ' '
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<L> = 'L' on 23:59:60
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</pre>
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<p>For the Meinberg parse look into clock_meinberg.c
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<br>
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<h2>Raw DCF77 Data via serial line</h2>
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<p>RAWDCF: end=TIMEOUT>1.5s, sync each char (any char),generate psuedo time
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codes, fixed format
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<p>
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direct DCF77 code input
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<p>In Europe it is relatively easy/cheap the receive the german time code
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transmitter DCF77. The simplest version to process its signal is to
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feed the 100/200ms pulse of the demodulated AM signal via a level
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converter to an RS232 port at 50Baud. parse/clk_rawdcf.c holds all
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necessary decoding logic for the time code which is transmitted each
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minute for one minute. A bit of the time code is sent once a second.
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<pre>
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The preferred tty setting is:
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CFLAG (B50|CS8|CREAD|CLOCAL)
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IFLAG 0
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OFLAG 0
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LFLAG 0
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</pre>
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<h2>DCF77 raw time code</h2>
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<p>From "Zur Zeit", Physikalisch-Technische Bundesanstalt (PTB), Braunschweig
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und Berlin, M<>rz 1989
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<br>
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<pre>
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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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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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</pre>
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<hr>
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<h2>Schmid clock</h2>
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<p>
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Schmid clock: needs poll, binary input, end='\xFC', sync start
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<p>
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The Schmid clock is a DCF77 receiver that sends a binary
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time code at the reception of a flag byte. The contents
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if the flag byte determined the time code format. The
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binary time code is delimited by the byte 0xFC.
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<PRE>
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TTY setup is:
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CFLAG (B1200|CS8|CREAD|CLOCAL)
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IFLAG 0
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OFLAG 0
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LFLAG 0
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</PRE>
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<p> The command to Schmid's DCF77 clock is a single byte; each bit
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allows the user to select some part of the time string, as follows (the
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output for the lsb is sent first).
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<pre>
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Bit 0: time in MEZ, 4 bytes *binary, not BCD*; hh.mm.ss.tenths
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Bit 1: date 3 bytes *binary, not BCD: dd.mm.yy
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Bit 2: week day, 1 byte (unused here)
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Bit 3: time zone, 1 byte, 0=MET, 1=MEST. (unused here)
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Bit 4: clock status, 1 byte, 0=time invalid,
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1=time from crystal backup,
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3=time from DCF77
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Bit 5: transmitter status, 1 byte,
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bit 0: backup antenna
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bit 1: time zone change within 1h
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bit 3,2: TZ 01=MEST, 10=MET
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bit 4: leap second will be
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added within one hour
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bits 5-7: Zero
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Bit 6: time in backup mode, units of 5 minutes (unused here)
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</pre>
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<hr>
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<h2>Trimble SV6 ASCII time code (TAIP)</h2>
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<p>
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Trimble SV6: needs poll, ascii timecode, start='>', end='<',
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query='>QTM<', eol='<'
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<p> Trimble SV6 is a GPS receiver with PPS output. It needs to be polled.
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It also need a special tty mode setup (EOL='<').
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<pre>
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TTY setup is:
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CFLAG (B4800|CS8|CREAD)
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IFLAG (BRKINT|IGNPAR|ISTRIP|ICRNL|IXON)
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OFLAG (OPOST|ONLCR)
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LFLAG (ICANON|ECHOK)
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Special flags are:
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PARSE_F_PPSPPS - use CIOGETEV for PPS time stamping
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PARSE_F_PPSONSECOND - the time code is not related to
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the PPS pulse (so use the time code
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only for the second epoch)
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Timecode
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0000000000111111111122222222223333333 / char
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0123456789012345678901234567890123456 \ posn
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>RTMhhmmssdddDDMMYYYYoodnnvrrrrr;*xx< Actual
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----33445566600112222BB7__-_____--99- Parse
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>RTM 1 ;* < Check
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</pre>
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<hr>
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<h2>ELV DCF7000</h2>
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<p>
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ELV DCF7000: end='\r', pattern=" - - - - - - - \r"
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<p>
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The ELV DCF7000 is a cheap DCF77 receiver sending each second
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a time code (though not very precise!) delimited by '`r'
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<pre>
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Timecode
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YY-MM-DD-HH-MM-SS-FF\r
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FF&0x1 - DST
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FF&0x2 - DST switch warning
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FF&0x4 - unsynchronised
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</pre>
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<hr>
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<h2>HOPF 6021 und Kompatible</h2>
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<p>
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HOPF Funkuhr 6021 mit serieller Schnittstelle
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Created by F.Schnekenbuehl <frank@comsys.dofn.de> from clk_rcc8000.c
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Nortel DASA Network Systems GmbH, Department: ND250
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A Joint venture of Daimler-Benz Aerospace and Nortel.
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<pre>
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hopf Funkuhr 6021
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used with 9600,8N1,
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UTC via serial line
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"Sekundenvorlauf" ON
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ETX zum Sekundenvorlauf ON
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dataformat 6021
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output time and date
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transmit with control characters
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transmit evry second
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Type 6021 Serial Output format
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000000000011111111 / char
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012345678901234567 \ position
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sABHHMMSSDDMMYYnre Actual
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C4110046231195 Parse
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s enr Check
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s = STX (0x02), e = ETX (0x03)
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n = NL (0x0A), r = CR (0x0D)
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A B - Status and weekday
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A - Status
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8 4 2 1
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x x x 0 - no announcement
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x x x 1 - Summertime - wintertime - summertime announcement
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x x 0 x - Wintertime
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x x 1 x - Summertime
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0 0 x x - Time/Date invalid
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0 1 x x - Internal clock used
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1 0 x x - Radio clock
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1 1 x x - Radio clock highprecision
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B - 8 4 2 1
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0 x x x - MESZ/MEZ
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1 x x x - UTC
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x 0 0 1 - Monday
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x 0 1 0 - Tuesday
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x 0 1 1 - Wednesday
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x 1 0 0 - Thursday
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x 1 0 1 - Friday
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x 1 1 0 - Saturday
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x 1 1 1 - Sunday
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</pre>
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<hr>
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<h2>Diem Computime Clock</h2>
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<p>
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The Computime receiver sends a datagram in the following format every minute
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<pre>
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Timestamp T:YY:MM:MD:WD:HH:MM:SSCRLF
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Pos 0123456789012345678901 2 3
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0000000000111111111122 2 2
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Parse T: : : : : : : \r\n
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T Startcharacter "T" specifies start of the timestamp
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YY Year MM Month 1-12
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MD Day of the month
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WD Day of week
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HH Hour
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MM Minute
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SS Second
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CR Carriage return
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LF Linefeed
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</pre>
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<hr>
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<h2>WHARTON 400A Series Clock with a 404.2 Serial interface</h2>
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<p>
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The WHARTON 400A Series clock is able to send date/time serial messages
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in 7 output formats. We use format 1 here because it is the shortest.
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We set up the clock to send a datagram every second.
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For use with this driver, the WHARTON 400A Series clock must be set-up
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as follows :
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<pre>
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Programmable Selected
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Option No Option
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BST or CET display 3 9 or 11
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No external controller 7 0
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Serial Output Format 1 9 1
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Baud rate 9600 bps 10 96
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Bit length 8 bits 11 8
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Parity even 12 E
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</pre>
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WHARTON 400A Series output format 1 is as follows :
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<pre>
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Timestamp STXssmmhhDDMMYYSETX
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Pos 0 12345678901234
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0 00000000011111
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STX start transmission (ASCII 0x02)
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ETX end transmission (ASCII 0x03)
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ss Second expressed in reversed decimal (units then tens)
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mm Minute expressed in reversed decimal
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hh Hour expressed in reversed decimal
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DD Day of month expressed in reversed decimal
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MM Month expressed in reversed decimal (January is 1)
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YY Year (without century) expressed in reversed decimal
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S Status byte : 0x30 +
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bit 0 0 = MSF source 1 = DCF source
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bit 1 0 = Winter time 1 = Summer time
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bit 2 0 = not synchronised 1 = synchronised
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bit 3 0 = no early warning 1 = early warning
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</pre>
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