Annotation of embedaddon/ntp/libparse/clk_schmid.c, revision 1.1
1.1 ! misho 1: /*
! 2: * /src/NTP/ntp4-dev/libparse/clk_schmid.c,v 4.9 2005/04/16 17:32:10 kardel RELEASE_20050508_A
! 3: *
! 4: * clk_schmid.c,v 4.9 2005/04/16 17:32:10 kardel RELEASE_20050508_A
! 5: *
! 6: * Schmid clock support
! 7: * based on information and testing from Adam W. Feigin et. al (Swisstime iis.ethz.ch)
! 8: *
! 9: * Copyright (c) 1995-2005 by Frank Kardel <kardel <AT> ntp.org>
! 10: * Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universität Erlangen-Nürnberg, Germany
! 11: *
! 12: * Redistribution and use in source and binary forms, with or without
! 13: * modification, are permitted provided that the following conditions
! 14: * are met:
! 15: * 1. Redistributions of source code must retain the above copyright
! 16: * notice, this list of conditions and the following disclaimer.
! 17: * 2. Redistributions in binary form must reproduce the above copyright
! 18: * notice, this list of conditions and the following disclaimer in the
! 19: * documentation and/or other materials provided with the distribution.
! 20: * 3. Neither the name of the author nor the names of its contributors
! 21: * may be used to endorse or promote products derived from this software
! 22: * without specific prior written permission.
! 23: *
! 24: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 25: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 26: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 27: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 28: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 29: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 30: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 31: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 32: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 33: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 34: * SUCH DAMAGE.
! 35: *
! 36: */
! 37:
! 38: #if HAVE_CONFIG_H
! 39: # include <config.h>
! 40: #endif
! 41:
! 42: #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_SCHMID)
! 43:
! 44: #include "ntp_fp.h"
! 45: #include "ntp_unixtime.h"
! 46: #include "ntp_calendar.h"
! 47:
! 48: #include "parse.h"
! 49:
! 50: #ifndef PARSESTREAM
! 51: #include "ntp_stdlib.h"
! 52: #include <stdio.h>
! 53: #else
! 54: #include "sys/parsestreams.h"
! 55: extern int printf (const char *, ...);
! 56: #endif
! 57:
! 58: /*
! 59: * Description courtesy of Adam W. Feigin et. al (Swisstime iis.ethz.ch)
! 60: *
! 61: * The command to Schmid's DCF77 clock is a single byte; each bit
! 62: * allows the user to select some part of the time string, as follows (the
! 63: * output for the lsb is sent first).
! 64: *
! 65: * Bit 0: time in MEZ, 4 bytes *binary, not BCD*; hh.mm.ss.tenths
! 66: * Bit 1: date 3 bytes *binary, not BCD: dd.mm.yy
! 67: * Bit 2: week day, 1 byte (unused here)
! 68: * Bit 3: time zone, 1 byte, 0=MET, 1=MEST. (unused here)
! 69: * Bit 4: clock status, 1 byte, 0=time invalid,
! 70: * 1=time from crystal backup,
! 71: * 3=time from DCF77
! 72: * Bit 5: transmitter status, 1 byte,
! 73: * bit 0: backup antenna
! 74: * bit 1: time zone change within 1h
! 75: * bit 3,2: TZ 01=MEST, 10=MET
! 76: * bit 4: leap second will be
! 77: * added within one hour
! 78: * bits 5-7: Zero
! 79: * Bit 6: time in backup mode, units of 5 minutes (unused here)
! 80: *
! 81: */
! 82: #define WS_TIME 0x01
! 83: #define WS_SIGNAL 0x02
! 84:
! 85: #define WS_ALTERNATE 0x01
! 86: #define WS_ANNOUNCE 0x02
! 87: #define WS_TZ 0x0c
! 88: #define WS_MET 0x08
! 89: #define WS_MEST 0x04
! 90: #define WS_LEAP 0x10
! 91:
! 92: static u_long cvt_schmid (unsigned char *, int, struct format *, clocktime_t *, void *);
! 93: static unsigned long inp_schmid (parse_t *, unsigned int, timestamp_t *);
! 94:
! 95: clockformat_t clock_schmid =
! 96: {
! 97: inp_schmid, /* no input handling */
! 98: cvt_schmid, /* Schmid conversion */
! 99: 0, /* not direct PPS monitoring */
! 100: 0, /* conversion configuration */
! 101: "Schmid", /* Schmid receiver */
! 102: 12, /* binary data buffer */
! 103: 0, /* no private data (complete messages) */
! 104: };
! 105:
! 106:
! 107: static u_long
! 108: cvt_schmid(
! 109: unsigned char *buffer,
! 110: int size,
! 111: struct format *format,
! 112: clocktime_t *clock_time,
! 113: void *local
! 114: )
! 115: {
! 116: if ((size != 11) || (buffer[10] != (unsigned char)'\375'))
! 117: {
! 118: return CVT_NONE;
! 119: }
! 120: else
! 121: {
! 122: if (buffer[0] > 23 || buffer[1] > 59 || buffer[2] > 59 || buffer[3] > 9) /* Time */
! 123: {
! 124: return CVT_FAIL|CVT_BADTIME;
! 125: }
! 126: else
! 127: if (buffer[4] < 1 || buffer[4] > 31 || buffer[5] < 1 || buffer[5] > 12
! 128: || buffer[6] > 99)
! 129: {
! 130: return CVT_FAIL|CVT_BADDATE;
! 131: }
! 132: else
! 133: {
! 134: clock_time->hour = buffer[0];
! 135: clock_time->minute = buffer[1];
! 136: clock_time->second = buffer[2];
! 137: clock_time->usecond = buffer[3] * 100000;
! 138: clock_time->day = buffer[4];
! 139: clock_time->month = buffer[5];
! 140: clock_time->year = buffer[6];
! 141:
! 142: clock_time->flags = 0;
! 143:
! 144: switch (buffer[8] & WS_TZ)
! 145: {
! 146: case WS_MET:
! 147: clock_time->utcoffset = -1*60*60;
! 148: break;
! 149:
! 150: case WS_MEST:
! 151: clock_time->utcoffset = -2*60*60;
! 152: clock_time->flags |= PARSEB_DST;
! 153: break;
! 154:
! 155: default:
! 156: return CVT_FAIL|CVT_BADFMT;
! 157: }
! 158:
! 159: if (!(buffer[7] & WS_TIME))
! 160: {
! 161: clock_time->flags |= PARSEB_POWERUP;
! 162: }
! 163:
! 164: if (!(buffer[7] & WS_SIGNAL))
! 165: {
! 166: clock_time->flags |= PARSEB_NOSYNC;
! 167: }
! 168:
! 169: if (buffer[7] & WS_SIGNAL)
! 170: {
! 171: if (buffer[8] & WS_ALTERNATE)
! 172: {
! 173: clock_time->flags |= PARSEB_ALTERNATE;
! 174: }
! 175:
! 176: if (buffer[8] & WS_ANNOUNCE)
! 177: {
! 178: clock_time->flags |= PARSEB_ANNOUNCE;
! 179: }
! 180:
! 181: if (buffer[8] & WS_LEAP)
! 182: {
! 183: clock_time->flags |= PARSEB_LEAPADD; /* default: DCF77 data format deficiency */
! 184: }
! 185: }
! 186:
! 187: clock_time->flags |= PARSEB_S_LEAP|PARSEB_S_ANTENNA;
! 188:
! 189: return CVT_OK;
! 190: }
! 191: }
! 192: }
! 193:
! 194: /*
! 195: * inp_schmid
! 196: *
! 197: * grep data from input stream
! 198: */
! 199: static u_long
! 200: inp_schmid(
! 201: parse_t *parseio,
! 202: unsigned int ch,
! 203: timestamp_t *tstamp
! 204: )
! 205: {
! 206: unsigned int rtc;
! 207:
! 208: parseprintf(DD_PARSE, ("inp_schmid(0x%lx, 0x%x, ...)\n", (long)parseio, ch));
! 209:
! 210: switch (ch)
! 211: {
! 212: case 0xFD: /* */
! 213: parseprintf(DD_PARSE, ("mbg_input: ETX seen\n"));
! 214: if ((rtc = parse_addchar(parseio, ch)) == PARSE_INP_SKIP)
! 215: return parse_end(parseio);
! 216: else
! 217: return rtc;
! 218:
! 219: default:
! 220: return parse_addchar(parseio, ch);
! 221: }
! 222: }
! 223:
! 224: #else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SCHMID) */
! 225: int clk_schmid_bs;
! 226: #endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_SCHMID) */
! 227:
! 228: /*
! 229: * History:
! 230: *
! 231: * clk_schmid.c,v
! 232: * Revision 4.9 2005/04/16 17:32:10 kardel
! 233: * update copyright
! 234: *
! 235: * Revision 4.8 2004/11/14 15:29:41 kardel
! 236: * support PPSAPI, upgrade Copyright to Berkeley style
! 237: *
! 238: * Revision 4.5 1999/11/28 09:13:51 kardel
! 239: * RECON_4_0_98F
! 240: *
! 241: * Revision 4.4 1998/06/13 12:06:03 kardel
! 242: * fix SYSV clock name clash
! 243: *
! 244: * Revision 4.3 1998/06/12 15:22:29 kardel
! 245: * fix prototypes
! 246: *
! 247: * Revision 4.2 1998/06/12 09:13:26 kardel
! 248: * conditional compile macros fixed
! 249: * printf prototype
! 250: *
! 251: * Revision 4.1 1998/05/24 09:39:53 kardel
! 252: * implementation of the new IO handling model
! 253: *
! 254: * Revision 4.0 1998/04/10 19:45:31 kardel
! 255: * Start 4.0 release version numbering
! 256: *
! 257: * from V3 3.22 log info deleted 1998/04/11 kardel
! 258: */
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