ntp/libparse/clk_wharton.c

2  * /src/NTP/ntp4-dev/libparse/clk_wharton.c,v 4.2 2004/11/14 15:29:41 kardel RELEASE_20050508_A
4  * clk_wharton.c,v 4.2 2004/11/14 15:29:41 kardel RELEASE_20050508_A
6  * From Philippe De Muyter <phdm@macqel.be>, 1999
12 #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_WHARTON_400A)
16  * Copyright (C) 1999, 2000 by Philippe De Muyter <phdm@macqel.be>
18  * This program is distributed in the hope that it will be useful, but WITHOUT
19  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37  * In private e-mail alastair@wharton.co.uk said :
38  * "If you are going to use the 400A and 404.2 system [for ntp] I recommend
39  * that you set the 400A to output the message every second.  The start of
40  * transmission of the first byte of the message is synchronised to the
42  * The WHARTON 400A Series is able to send date/time serial messages
43  * in 7 output formats.  We use format 1 here because it is the shortest.
44  * For use with this driver, the WHARTON 400A Series clock must be set-up
45  * as follows :
47  *					Option No	Option
48  *	BST or CET display		3		9 or 11
49  *	No external controller		7		0
51  *	Baud rate 9600 bps		10		96
52  *	Bit length 8 bits		11		8
53  *	Parity even			12		E
55  * WHARTON 400A Series output format 1 is as follows :
63  *	ss	Second expressed in reversed decimal (units then tens)
64  *	mm	Minute expressed in reversed decimal
65  *	hh	Hour expressed in reversed decimal
66  *	DD	Day of month expressed in reversed decimal
67  *	MM	Month expressed in reversed decimal (January is 1)
68  *	YY	Year (without century) expressed in reversed decimal
73  *			bit 3	0 = no early warning	1 = early warning
97 	if (size != 15 || buffer[0] != STX || buffer[14] != ETX
98 	    || buffer[13] < '0' || buffer[13] > ('0' + 0xf))
100 	for (i = 1; i < 13; i += 1)
101 		if (buffer[i] < '0' || buffer[i] > '9')
103 	clock_time->second = (buffer[2] - '0') * 10 + buffer[1] - '0';
104 	clock_time->minute = (buffer[4] - '0') * 10 + buffer[3] - '0';
105 	clock_time->hour   = (buffer[6] - '0') * 10 + buffer[5] - '0';
106 	clock_time->day    = (buffer[8] - '0') * 10 + buffer[7] - '0';
107 	clock_time->month  = (buffer[10] - '0') * 10 + buffer[9] - '0';
108 	clock_time->year   = (buffer[12] - '0') * 10 + buffer[11] - '0';
110 	if (buffer[13] & 0x1) /* We have CET time */
111 		clock_time->utcoffset = -1*60*60;
112 	else		/* We have BST time */
114 	if (buffer[13] & 0x2) {
116 		clock_time->utcoffset += -1*60*60;
118 	if (!(buffer[13] & 0x4))
120 	if (buffer[13] & 0x8)
134 	      char         ch,
140 	parseprintf(DD_PARSE, ("inp_wharton_400a(0x%p, 0x%x, ...)\n", (void*)parseio, ch));
142 	switch (ch)
148 		parseio->parse_data[0] = ch;
154 		if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP)
160 		return parse_addchar(parseio, ch);
168 	0,			/* no PPS monitoring */
171 	15,			/* string buffer */
172 	0			/* no private data (complete packets) */
181  * Revision 4.1  1999/02/28 15:27:24  kardel