pkg://dcf77time-19961119-3.src.rpm:15618/dcf77time.tar.gz
info downloads
dcf77time/ 40755 765 144 0 6244412357 11276 5 ustar chris users dcf77time/Makefile 100644 765 144 1777 6244144670 13047 0 ustar chris users #
# Makefile for 'dcf77time'
#
######################################################################
# C-Compiler
######################################################################
CFLAGS = -O2 -m486 -Wall $(INC)
CC = gcc
######################################################################
# Pfade
######################################################################
INC =
LDLIBS =
######################################################################
# Module & Bibliotheken
######################################################################
SRC = dcf77time.c serial.c times.c
LOADLIBES =
OBJ = $(SRC:.c=.o)
######################################################################
# Regeln
######################################################################
all: dcf77time
dcf77time: $(OBJ)
$(CC) $(OBJ) $(LOADLIBES) $(LDLIBS) -o dcf77time
install:
cp -pf dcf77time /usr/local/sbin
cp -pf dcf77time.1 /usr/man/man1
strip /usr/local/sbin/dcf77time
clean:
rm -f *.o dcf77time
dcf77time/README 100644 765 144 4445 6244412347 12261 0 ustar chris users
DCF77 radio clock information for LINUX
=======================================
'dcf77time' reads from a DCF77-Module ('Atom Clock') via a
serial port the raw time transmitted at 77.5 Khz from a
antenna located at Mainflingen near Frankfurt/Main (Ger-
many). The DCF77-Module is sold by Conrad-Electronic in
Germany (DCF-Modul "WT 100 seriell" - Order-Nr. 64 19
60-12). It is not that accurate and doesn't provide date
information, but it's very cheap (18 DM).
'dcf77time' is primary for use in Germany since it relies
on the DCF77 signal. But it might be of interest to some
surrounding countries too.
Conrad-Electronic says that you can connect a Mouse to the
same serial port, but I don expect this to work with this
'driver'. Although I didn't try it.
To connect the DCF77-Module to the serial port a special
cable is needed. Conrad sells this cable for an extra 18 DM
together with a simple DOS-Software. If you want to save
some money and do not need the DOS-Software you can build
this cable by yourself (it's quite easy).
Cable layout:
serial Port RS232-Meaning DCF77-Module
25pin 9pin
2 3 ---(TxD)----------------- GND (1)
8 1 ---(DCD)----------------- Data (2)
4 7 ---(RTS)----------------- VDD (3)
20 4 ---(DTR)----------------- Clock (4)
My DCF77-Module (looking at the rear side):
+-------------------------------------------+
| __ LR44 |
| / \ + (4)(3)(2)(1) |
| \ / UP ------------ |
| -- |
| |
| A N T E N N A |
+-------------------------------------------+
Copyright: dcf77pcf is Copyright to Christian Brunner, 1996
This software is distributed under GPL, see the file
COPYING for more details
Credits: Werner Biebl for his great UNIX teaching over the years
and the new 'zoneinfo'
Christian (chb@muc.de)
dcf77time/TODO 100644 765 144 57 6244144670 12025 0 ustar chris users TODO
- code cleanup
- implement 'daemon mode'
dcf77time/dcf77time.c 100644 765 144 7561 6244144670 13341 0 ustar chris users /*
* dcf77time.c
*
* Copyright (C) 1996 Christian Brunner (chb@muc.de)
*/
/*
* 'dcf77time' gets the standart time from a Connrad DCF77-Module (connected
* a serial port) and sets the system clock.
*
* NOTE: On havy loaded or very slow systems the data read from the Module
* might be corrupted.
*
*/
#include <stdio.h>
#include "serial.h"
#include "times.h"
void usage() {
fprintf(stderr, "Usage: dcf77time [-s n] device\n");
}
void main(int argc, char *argv[]) {
int i, seconds, range = 5;
int dfd=0;
uid_t uid;
char dtr_flag = 0;
int data_flag = 0;
char range_flag = 0;
char dcd;
char data[32], outp[8];
time_t ghost_time;
time_t nowtime;
char *date;
struct timeval tv1, tv2, tv3;
putenv("TZ=''"); // Switch to UTC
ghost_time = get_gost_time();
// parse args
if (argc==1) {
usage();
exit(1);
}
for (i=1; i<argc;i++) {
if( !strcmp("-?",argv[i]) || !strcmp("-?",argv[i]) ){
usage();
exit(0);
} else if (!strcmp("-s", argv[(i)])) {
if (argc!=4) {
usage();
exit(1);
}
i++;
range = atoi(argv[(i)]);
range_flag=1;
} else {
if(range_flag==1 && argc==4) {
dfd = open_com(argv[(range_flag*2+1)]);
} else if (range_flag==0 && argc==2) {
dfd = open_com(argv[(range_flag*2+1)]);
} else {
usage();
exit(1);
}
}
}
printf("DCF77TIME:\n\n");
uid = geteuid();
nowtime = time(NULL)+3;
togle_rts(dfd, ON);
for(i=0;i<1000;i++) {
if (dtr_flag) {
dtr_flag=0;
togle_dtr(dfd, OFF);
dcd=read_dcd(dfd);
if(data_flag || dcd) {
data[data_flag] = dcd;
data_flag++;
}
if(data_flag>32) break;
usleep(6000);
} else {
dtr_flag=1;
togle_dtr(dfd, ON);
usleep(6000);
}
}
if(i==1000) {
fprintf(stderr, "No DCF77 Clock connected?\n");
exit(1);
}
for(i=0; i<8; i++) {
outp[i] = data[(i*4)+3];
outp[i] += data[(i*4)+2]*2;
outp[i] += data[(i*4)+1]*4;
outp[i] += data[(i*4) ]*8;
}
seconds=(outp[7]*10+outp[6])*3600+
(outp[5]*10+outp[4])*60+
outp[3]*10+outp[2]+2; // wonder why I had to add 2 seconds
// here - expected 1
ghost_time+=seconds;
if(data[6]) { // MEZ
ghost_time-=3600;
if ((outp[7]*10+outp[6])<1) ghost_time+=86400;
} else { // MESZ
ghost_time-=7200;
if ((outp[7]*10+outp[6])<2) ghost_time+=86400;
}
tv1.tv_sec=ghost_time; tv1.tv_usec=100000;
if(outp[0] != 9) {
fprintf(stderr, "Data invalid!\nNo DCF77 Clock connected?\n");
exit(1);
}
if(data[6] == data[7]) {
fprintf(stderr, "Data invalid!\n");
exit(1);
}
if(!data[4]) fprintf(stderr, "Warning: No DCF77-Signal\n\n");
if(data[5]) fprintf(stderr, "Warning: Battery low!\n\n");
if (range !=0 && abs(nowtime - ghost_time) > range) {
fprintf(stderr, "Error: Internal clock and DCF77 clock"
"differ more than %i seconds.\n"
"I won't set time!\n\n", range);
} else {
// Wait for next second to begin
// (to be more accurate)
for(i=0;i<1000;i++) {
if (dtr_flag) {
dtr_flag=0;
togle_dtr(dfd, OFF);
dcd=read_dcd(dfd);
if (dcd) break;
usleep(6000);
} else {
dtr_flag=1;
togle_dtr(dfd, ON);
usleep(6000);
}
}
// set the time
if (!uid && (range <= 5) && (range !=0)) {
// use adjtime for little changes
// (clock doesn't jump)
gettimeofday(&tv2, NULL);
timeval_subtract(&tv3, &tv1, &tv2);
if(adjtime(&tv3, &tv2)) perror("adjtime");
} else if(!uid) {
// use the quite radical settimeofday for
// big changes
settimeofday(&tv1, NULL);
} else {
fprintf(stderr,
"Warning: You must be ROOT to set the time\n\n");
}
}
printf(" UTC: ");
date = ctime(&ghost_time);
printf("%s", date);
togle_rts(dfd, OFF);
close(dfd);
}
dcf77time/serial.c 100644 765 144 2455 6244144670 13024 0 ustar chris users /*
* serial.c
*
* Copyright (C) 1996 Christian Brunner (chb@muc.de)
*/
#include "serial.h"
void togle_dtr(int fd, char onoff) { // turn DTR on/off
int mctl=TIOCM_DTR;
if (onoff == 0) {
if ( ioctl( fd, TIOCMBIS, &mctl) < 0 ) {
perror("TIOCMBIS failed\n");
exit(1);
}
} else {
if ( ioctl( fd, TIOCMBIC, (char *)&mctl) < 0 ) {
perror("TIOCMBIC failed\n");
exit(1);
}
}
}
void togle_rts(int fd, char onoff) { // turn RTS on/off
int mctl=TIOCM_RTS;
if (onoff == 0) {
if ( ioctl( fd, TIOCMBIS, &mctl) < 0 ) {
perror("TIOCMBIS failed\n");
exit(1);
}
} else {
if ( ioctl( fd, TIOCMBIC, (char *)&mctl) < 0 ) {
perror("TIOCMBIC failed\n");
exit(1);
}
}
}
int read_dcd(int fd) { // get DCD-line-status
int flags;
if ( ioctl(fd, TIOCMGET, &flags ) < 0 ) {
perror("tio_get_rs232_lines: TIOCMGET failed" );
exit(1);
}
if (flags & TIOCM_CAR ) return(0);
else return(1);
}
int open_com(char *device) { // Open tty
int dfd;
dfd=open(device, O_RDWR | O_NDELAY);
if (dfd<0) {
perror("Can't open device");
exit(1);
}
return (dfd);
}
dcf77time/serial.h 100644 765 144 623 6244144670 13004 0 ustar chris users /*
* serial.h
*
* Copyright (C) 1996 Christian Brunner (chb@muc.de)
*/
#include <termios.h>
#include <fcntl.h>
#include <stdio.h>
#include <linux/ioctl.h>
#include <sys/ioctl.h>
#define ON 0
#define OFF 1
void togle_dtr(int, char); // Turn ON/OFF DTR-line
void togle_rts(int, char); // Turn ON/OFF RTS-line
int read_dcd(int); // Get status of DCD-Line
int open_com(char *); // Open device
dcf77time/times.c 100644 765 144 2036 6244144670 12661 0 ustar chris users /*
* times.c
*
* Copyright (C) 1996 Christian Brunner (chb@muc.de)
*/
#include "times.h"
time_t get_gost_time() // Computes time at Midnight
{
struct tm *stime;
time_t tmp_time;
tmp_time = time(NULL);
stime = localtime (&tmp_time);
stime->tm_sec=0;
stime->tm_min=0;
stime->tm_hour=0;
return (mktime(stime));
}
int timeval_subtract (result, x, y)
struct timeval *result, *x, *y;
{
/* Perform the carry for the later subtraction by updating Y. */
if (x->tv_usec < y->tv_usec) {
int nsec = (y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if (x->tv_usec - y->tv_usec > 1000000) {
int nsec = (y->tv_usec - x->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
/* Compute the time remaining to wait.
`tv_usec' is certainly positive. */
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/* Return 1 if result is negative. */
return x->tv_sec < y->tv_sec;
}
dcf77time/times.h 100644 765 144 506 6244144670 12646 0 ustar chris users /*
* times.c
*
* Copyright (C) 1996 Christian Brunner (chb@muc.de)
*/
#include <sys/time.h>
#include <unistd.h>
#include <stdlib.h>
time_t get_gost_time(); // Copute time at midnight
// Calculate difference between two timval structures
int timeval_subtract (struct timeval *, struct timeval *, struct timeval *);
dcf77time/README.ger 100644 765 144 4334 6244412357 13033 0 ustar chris users
DCF77 Funkuhr für LINUX
=======================
'dcf77time' liest aus einem DCF77-Modul ('Atom-Uhr') die Normal-
Zeit die auf 77,5 kHz in Mainflingen nahe Frankfurt/Main über eine
serielle Schnittstelle aus. Das DCF77-Modul wir von Conrad-Electronic
in Deutschland verkauft (DCF-Modul "WT 100 seriell" - Best.-Nr. 64 19
60-12). Es ist nicht besonders genau und stellt keine Datums Information
zur Verfügung, aber es ist ziemlich billig (18 DM).
'dcf77time' ist hauptsächlich zur Benutzung in Deutschland gedacht,
da es auf das DCF77-Signal angewiesen ist. Aber auf für einige angrenzende
Länder könnte es interessant sein.
Conrad-Electronic behauptet, daß man an die serielle Schnittstelle
gleichzeitig eine Maus anschliessen kann, aber ich glaube nicht, daß
das mit diesem Treiber funktioniert. Obwohl ich es nicht probiert habe.
Um das DCF77-Modul an die serielle Schnittstelle anschließen zu können
ist ein spezielles Kabel nötig. Conrad verkauft dieses für zusätzliche
18 DM (inkl. DOS-Software). Wenn man aber nicht ein wenig sparen möchte
kann man das Kabel auch leicht selbst bauen.
Kabelbelegung:
serial Port RS232-Bedeutung DCF77-Modul
25pin 9pin
2 3 ---(TxD)----------------- GND (1)
8 1 ---(DCD)----------------- Data (2)
4 7 ---(RTS)----------------- VDD (3)
20 4 ---(DTR)----------------- Clock (4)
Mein DCF77-Modul (von hinten gesehen):
+-------------------------------------------+
| __ LR44 |
| / \ + (4)(3)(2)(1) |
| \ / UP ------------ |
| -- |
| |
| A N T E N N E |
+-------------------------------------------+
Copyright: dcf77pcf is Copyright to Christian Brunner, 1996
This software is distributed under GPL, see the file
COPYING for more details
Credits: Werner Biebl for his great UNIX teaching over the years
and the new 'zoneinfo'
Christian (chb@muc.de)
dcf77time/COPYING 100644 765 144 43076 6244146612 12456 0 ustar chris users GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.
675 Mass Ave, Cambridge, MA 02139, USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things.
To protect your rights, we need to make restrictions that forbid
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These restrictions translate to certain responsibilities for you if you
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For example, if you distribute copies of such a program, whether
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you have. You must make sure that they, too, receive or can get the
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rights.
We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.
Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
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Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free
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program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all.
The precise terms and conditions for copying, distribution and
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GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
under the terms of this General Public License. The "Program", below,
refers to any such program or work, and a "work based on the Program"
means either the Program or any derivative work under copyright law:
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either verbatim or with modifications and/or translated into another
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the term "modification".) Each licensee is addressed as "you".
Activities other than copying, distribution and modification are not
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running the Program is not restricted, and the output from the Program
is covered only if its contents constitute a work based on the
Program (independent of having been made by running the Program).
Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
source code as you receive it, in any medium, provided that you
conspicuously and appropriately publish on each copy an appropriate
copyright notice and disclaimer of warranty; keep intact all the
notices that refer to this License and to the absence of any warranty;
and give any other recipients of the Program a copy of this License
along with the Program.
You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
2. You may modify your copy or copies of the Program or any portion
of it, thus forming a work based on the Program, and copy and
distribute such modifications or work under the terms of Section 1
above, provided that you also meet all of these conditions:
a) You must cause the modified files to carry prominent notices
stating that you changed the files and the date of any change.
b) You must cause any work that you distribute or publish, that in
whole or in part contains or is derived from the Program or any
part thereof, to be licensed as a whole at no charge to all third
parties under the terms of this License.
c) If the modified program normally reads commands interactively
when run, you must cause it, when started running for such
interactive use in the most ordinary way, to print or display an
announcement including an appropriate copyright notice and a
notice that there is no warranty (or else, saying that you provide
a warranty) and that users may redistribute the program under
these conditions, and telling the user how to view a copy of this
License. (Exception: if the Program itself is interactive but
does not normally print such an announcement, your work based on
the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
identifiable sections of that work are not derived from the Program,
and can be reasonably considered independent and separate works in
themselves, then this License, and its terms, do not apply to those
sections when you distribute them as separate works. But when you
distribute the same sections as part of a whole which is a work based
on the Program, the distribution of the whole must be on the terms of
this License, whose permissions for other licensees extend to the
entire whole, and thus to each and every part regardless of who wrote it.
Thus, it is not the intent of this section to claim rights or contest
your rights to work written entirely by you; rather, the intent is to
exercise the right to control the distribution of derivative or
collective works based on the Program.
In addition, mere aggregation of another work not based on the Program
with the Program (or with a work based on the Program) on a volume of
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3. You may copy and distribute the Program (or a work based on it,
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4. You may not copy, modify, sublicense, or distribute the Program
except as expressly provided under this License. Any attempt
otherwise to copy, modify, sublicense or distribute the Program is
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certain countries either by patents or by copyrighted interfaces, the
original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
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NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.
12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
Appendix: How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) 19yy <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) 19yy name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General
Public License instead of this License.
dcf77time/dcf77time.1 100644 765 144 2252 6244144725 13250 0 ustar chris users .\" -*- nroff -*-
.TH DCF77TIME 1
.SH NAME
dcf77time \- reads DCF77 radio clock information
.SH SYNOPSIS
.B dcf77time
[
.BI \-s
seconds
]
.BI device
.SH DESCRIPTION
.B dcf77time
reads from a
.B DCF77-Module
('Atom Clock')
via a serial port the raw time
transmitted at 77.5 Khz from a antenna
located at Mainflingen near Frankfurt/Main (Germany).
The
.B DCF77-Module
is sold by Conrad-Electronic in Germany (DCF-Modul "WT 100 seriell" -
Order-Nr. 64 19 60-12). It is not that accurate and doesn't provide
date information, but it's very cheap (18 DM).
.B dcf77time
shows the received information on the screen and sets the
.B system time
according to this information.
.SH OPTIONS
.TP
.B -s seconds
since the data read from the DCF77-Module might be corrupted in
some very rare cases (slow or heavy loaded machines)
the time read from the module is compared
with the system time. If these two values differ more than n
seconds the system time won't be set. A vallue of 0 seconds dissables
this feature. (default: 5 seconds)
.TP
.B device
The serial device to which the Module is connected.
.LP
.SH "SEE ALSO"
.BR date (1)
.BR clock (8),
.SH AUTHOR
Christian Brunner (chb@muc.de)
