1 /* 2 * /src/NTP/REPOSITORY/ntp4-dev/libparse/clk_rawdcf.c,v 4.18 2006/06/22 18:40:01 kardel RELEASE_20060622_A 3 * 4 * clk_rawdcf.c,v 4.18 2006/06/22 18:40:01 kardel RELEASE_20060622_A 5 * 6 * Raw DCF77 pulse clock support 7 * 8 * Copyright (c) 1995-2015 by Frank Kardel <kardel <AT> ntp.org> 9 * Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universitaet Erlangen-Nuernberg, Germany 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the author nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 */ 36 37 #ifdef HAVE_CONFIG_H 38 # include <config.h> 39 #endif 40 41 #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_RAWDCF) 42 43 #include "ntp_fp.h" 44 #include "timevalops.h" 45 #include "ntp_unixtime.h" 46 #include "ntp_calendar.h" 47 48 #include "parse.h" 49 #ifdef PARSESTREAM 50 # include <sys/parsestreams.h> 51 #endif 52 53 #ifndef PARSEKERNEL 54 # include "ntp_stdlib.h" 55 #endif 56 57 /* 58 * DCF77 raw time code 59 * 60 * From "Zur Zeit", Physikalisch-Technische Bundesanstalt (PTB), Braunschweig 61 * und Berlin, Maerz 1989 62 * 63 * Timecode transmission: 64 * AM: 65 * time marks are send every second except for the second before the 66 * next minute mark 67 * time marks consist of a reduction of transmitter power to 25% 68 * of the nominal level 69 * the falling edge is the time indication (on time) 70 * time marks of a 100ms duration constitute a logical 0 71 * time marks of a 200ms duration constitute a logical 1 72 * FM: 73 * see the spec. (basically a (non-)inverted psuedo random phase shift) 74 * 75 * Encoding: 76 * Second Contents 77 * 0 - 10 AM: free, FM: 0 78 * 11 - 14 free 79 * 15 R - "call bit" used to signalize irregularities in the control facilities 80 * (until 2003 indicated transmission via alternate antenna) 81 * 16 A1 - expect zone change (1 hour before) 82 * 17 - 18 Z1,Z2 - time zone 83 * 0 0 illegal 84 * 0 1 MEZ (MET) 85 * 1 0 MESZ (MED, MET DST) 86 * 1 1 illegal 87 * 19 A2 - expect leap insertion/deletion (1 hour before) 88 * 20 S - start of time code (1) 89 * 21 - 24 M1 - BCD (lsb first) Minutes 90 * 25 - 27 M10 - BCD (lsb first) 10 Minutes 91 * 28 P1 - Minute Parity (even) 92 * 29 - 32 H1 - BCD (lsb first) Hours 93 * 33 - 34 H10 - BCD (lsb first) 10 Hours 94 * 35 P2 - Hour Parity (even) 95 * 36 - 39 D1 - BCD (lsb first) Days 96 * 40 - 41 D10 - BCD (lsb first) 10 Days 97 * 42 - 44 DW - BCD (lsb first) day of week (1: Monday -> 7: Sunday) 98 * 45 - 49 MO - BCD (lsb first) Month 99 * 50 MO0 - 10 Months 100 * 51 - 53 Y1 - BCD (lsb first) Years 101 * 54 - 57 Y10 - BCD (lsb first) 10 Years 102 * 58 P3 - Date Parity (even) 103 * 59 - usually missing (minute indication), except for leap insertion 104 */ 105 106 static parse_pps_fnc_t pps_rawdcf; 107 static parse_cvt_fnc_t cvt_rawdcf; 108 static parse_inp_fnc_t inp_rawdcf; 109 110 typedef struct last_tcode { 111 time_t tcode; /* last converted time code */ 112 timestamp_t tminute; /* sample time for minute start */ 113 timestamp_t timeout; /* last timeout timestamp */ 114 } last_tcode_t; 115 116 #define BUFFER_MAX 61 117 118 clockformat_t clock_rawdcf = 119 { 120 inp_rawdcf, /* DCF77 input handling */ 121 cvt_rawdcf, /* raw dcf input conversion */ 122 pps_rawdcf, /* examining PPS information */ 123 0, /* no private configuration data */ 124 "RAW DCF77 Timecode", /* direct decoding / time synthesis */ 125 126 BUFFER_MAX, /* bit buffer */ 127 sizeof(last_tcode_t) 128 }; 129 130 static struct dcfparam 131 { 132 const unsigned char *onebits; 133 const unsigned char *zerobits; 134 } dcfparameter = 135 { 136 (const unsigned char *)"###############RADMLS1248124P124812P1248121241248112481248P??", /* 'ONE' representation */ 137 (const unsigned char *)"--------------------s-------p------p----------------------p__" /* 'ZERO' representation */ 138 }; 139 140 static struct rawdcfcode 141 { 142 char offset; /* start bit */ 143 } rawdcfcode[] = 144 { 145 { 0 }, { 15 }, { 16 }, { 17 }, { 19 }, { 20 }, { 21 }, { 25 }, { 28 }, { 29 }, 146 { 33 }, { 35 }, { 36 }, { 40 }, { 42 }, { 45 }, { 49 }, { 50 }, { 54 }, { 58 }, { 59 } 147 }; 148 149 #define DCF_M 0 150 #define DCF_R 1 151 #define DCF_A1 2 152 #define DCF_Z 3 153 #define DCF_A2 4 154 #define DCF_S 5 155 #define DCF_M1 6 156 #define DCF_M10 7 157 #define DCF_P1 8 158 #define DCF_H1 9 159 #define DCF_H10 10 160 #define DCF_P2 11 161 #define DCF_D1 12 162 #define DCF_D10 13 163 #define DCF_DW 14 164 #define DCF_MO 15 165 #define DCF_MO0 16 166 #define DCF_Y1 17 167 #define DCF_Y10 18 168 #define DCF_P3 19 169 170 static struct partab 171 { 172 char offset; /* start bit of parity field */ 173 } partab[] = 174 { 175 { 21 }, { 29 }, { 36 }, { 59 } 176 }; 177 178 #define DCF_P_P1 0 179 #define DCF_P_P2 1 180 #define DCF_P_P3 2 181 182 #define DCF_Z_MET 0x2 183 #define DCF_Z_MED 0x1 184 185 static u_long 186 ext_bf( 187 unsigned char *buf, 188 int idx, 189 const unsigned char *zero 190 ) 191 { 192 u_long sum = 0; 193 int i, first; 194 195 first = rawdcfcode[idx].offset; 196 197 for (i = rawdcfcode[idx+1].offset - 1; i >= first; i--) 198 { 199 sum <<= 1; 200 sum |= (buf[i] != zero[i]); 201 } 202 return sum; 203 } 204 205 static unsigned 206 pcheck( 207 unsigned char *buf, 208 int idx, 209 const unsigned char *zero 210 ) 211 { 212 int i,last; 213 unsigned psum = 1; 214 215 last = partab[idx+1].offset; 216 217 for (i = partab[idx].offset; i < last; i++) 218 psum ^= (buf[i] != zero[i]); 219 220 return psum; 221 } 222 223 static u_long 224 convert_rawdcf( 225 unsigned char *buffer, 226 int size, 227 struct dcfparam *dcfprm, 228 clocktime_t *clock_time 229 ) 230 { 231 unsigned char *s = buffer; 232 const unsigned char *b = dcfprm->onebits; 233 const unsigned char *c = dcfprm->zerobits; 234 int i; 235 236 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: \"%.*s\"\n", size, buffer)); 237 238 if (size < 57) 239 { 240 #ifndef PARSEKERNEL 241 msyslog(LOG_ERR, "parse: convert_rawdcf: INCOMPLETE DATA - time code only has %d bits", size); 242 #endif 243 return CVT_FAIL|CVT_BADFMT; 244 } 245 246 for (i = 0; i < size; i++) 247 { 248 if ((*s != *b) && (*s != *c)) 249 { 250 /* 251 * we only have two types of bytes (ones and zeros) 252 */ 253 #ifndef PARSEKERNEL 254 msyslog(LOG_ERR, "parse: convert_rawdcf: BAD DATA - no conversion"); 255 #endif 256 return CVT_FAIL|CVT_BADFMT; 257 } 258 if (*b) b++; 259 if (*c) c++; 260 s++; 261 } 262 263 /* 264 * check Start and Parity bits 265 */ 266 if ((ext_bf(buffer, DCF_S, dcfprm->zerobits) == 1) && 267 pcheck(buffer, DCF_P_P1, dcfprm->zerobits) && 268 pcheck(buffer, DCF_P_P2, dcfprm->zerobits) && 269 pcheck(buffer, DCF_P_P3, dcfprm->zerobits)) 270 { 271 /* 272 * buffer OK 273 */ 274 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: parity check passed\n")); 275 276 clock_time->flags = PARSEB_S_CALLBIT|PARSEB_S_LEAP; 277 clock_time->utctime= 0; 278 clock_time->usecond= 0; 279 clock_time->second = 0; 280 clock_time->minute = ext_bf(buffer, DCF_M10, dcfprm->zerobits); 281 clock_time->minute = TIMES10(clock_time->minute) + ext_bf(buffer, DCF_M1, dcfprm->zerobits); 282 clock_time->hour = ext_bf(buffer, DCF_H10, dcfprm->zerobits); 283 clock_time->hour = TIMES10(clock_time->hour) + ext_bf(buffer, DCF_H1, dcfprm->zerobits); 284 clock_time->day = ext_bf(buffer, DCF_D10, dcfprm->zerobits); 285 clock_time->day = TIMES10(clock_time->day) + ext_bf(buffer, DCF_D1, dcfprm->zerobits); 286 clock_time->month = ext_bf(buffer, DCF_MO0, dcfprm->zerobits); 287 clock_time->month = TIMES10(clock_time->month) + ext_bf(buffer, DCF_MO, dcfprm->zerobits); 288 clock_time->year = ext_bf(buffer, DCF_Y10, dcfprm->zerobits); 289 clock_time->year = TIMES10(clock_time->year) + ext_bf(buffer, DCF_Y1, dcfprm->zerobits); 290 291 switch (ext_bf(buffer, DCF_Z, dcfprm->zerobits)) 292 { 293 case DCF_Z_MET: 294 clock_time->utcoffset = -1*60*60; 295 break; 296 297 case DCF_Z_MED: 298 clock_time->flags |= PARSEB_DST; 299 clock_time->utcoffset = -2*60*60; 300 break; 301 302 default: 303 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: BAD TIME ZONE\n")); 304 return CVT_FAIL|CVT_BADFMT; 305 } 306 307 if (ext_bf(buffer, DCF_A1, dcfprm->zerobits)) 308 clock_time->flags |= PARSEB_ANNOUNCE; 309 310 if (ext_bf(buffer, DCF_A2, dcfprm->zerobits)) 311 clock_time->flags |= PARSEB_LEAPADD; /* default: DCF77 data format deficiency */ 312 313 if (ext_bf(buffer, DCF_R, dcfprm->zerobits)) 314 clock_time->flags |= PARSEB_CALLBIT; 315 316 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: TIME CODE OK: %02d:%02d, %02d.%02d.%02d, flags 0x%lx\n", 317 (int)clock_time->hour, (int)clock_time->minute, (int)clock_time->day, (int)clock_time->month,(int) clock_time->year, 318 (u_long)clock_time->flags)); 319 return CVT_OK; 320 } 321 else 322 { 323 /* 324 * bad format - not for us 325 */ 326 #ifndef PARSEKERNEL 327 msyslog(LOG_ERR, "parse: convert_rawdcf: start bit / parity check FAILED for \"%.*s\"", size, buffer); 328 #endif 329 return CVT_FAIL|CVT_BADFMT; 330 } 331 } 332 333 /* 334 * parse_cvt_fnc_t cvt_rawdcf 335 * raw dcf input routine - needs to fix up 50 baud 336 * characters for 1/0 decision 337 */ 338 static u_long 339 cvt_rawdcf( 340 unsigned char *buffer, 341 int size, 342 struct format *param, 343 clocktime_t *clock_time, 344 void *local 345 ) 346 { 347 last_tcode_t *t = (last_tcode_t *)local; 348 unsigned char *s = (unsigned char *)buffer; 349 unsigned char *e = s + size; 350 const unsigned char *b = dcfparameter.onebits; 351 const unsigned char *c = dcfparameter.zerobits; 352 u_long rtc = CVT_NONE; 353 unsigned int i, lowmax, highmax, cutoff, span; 354 #define BITS 9 355 unsigned char histbuf[BITS]; 356 /* 357 * the input buffer contains characters with runs of consecutive 358 * bits set. These set bits are an indication of the DCF77 pulse 359 * length. We assume that we receive the pulse at 50 Baud. Thus 360 * a 100ms pulse would generate a 4 bit train (20ms per bit and 361 * start bit) 362 * a 200ms pulse would create all zeroes (and probably a frame error) 363 */ 364 365 for (i = 0; i < BITS; i++) 366 { 367 histbuf[i] = 0; 368 } 369 370 cutoff = 0; 371 lowmax = 0; 372 373 while (s < e) 374 { 375 unsigned int ch = *s ^ 0xFF; 376 /* 377 * these lines are left as an excercise to the reader 8-) 378 */ 379 if (!((ch+1) & ch) || !*s) 380 { 381 382 for (i = 0; ch; i++) 383 { 384 ch >>= 1; 385 } 386 387 *s = (unsigned char) i; 388 histbuf[i]++; 389 cutoff += i; 390 lowmax++; 391 } 392 else 393 { 394 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: character check for 0x%x@%d FAILED\n", *s, (int)(s - (unsigned char *)buffer))); 395 *s = (unsigned char)~0; 396 rtc = CVT_FAIL|CVT_BADFMT; 397 } 398 s++; 399 } 400 401 if (lowmax) 402 { 403 cutoff /= lowmax; 404 } 405 else 406 { 407 cutoff = 4; /* doesn't really matter - it'll fail anyway, but gives error output */ 408 } 409 410 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: average bit count: %d\n", cutoff)); 411 412 lowmax = 0; 413 highmax = 0; 414 415 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: histogram:")); 416 for (i = 0; i <= cutoff; i++) 417 { 418 lowmax+=histbuf[i] * i; 419 highmax += histbuf[i]; 420 parseprintf(DD_RAWDCF,(" %d", histbuf[i])); 421 } 422 parseprintf(DD_RAWDCF, (" <M>")); 423 424 lowmax += highmax / 2; 425 426 if (highmax) 427 { 428 lowmax /= highmax; 429 } 430 else 431 { 432 lowmax = 0; 433 } 434 435 highmax = 0; 436 cutoff = 0; 437 438 for (; i < BITS; i++) 439 { 440 highmax+=histbuf[i] * i; 441 cutoff +=histbuf[i]; 442 parseprintf(DD_RAWDCF,(" %d", histbuf[i])); 443 } 444 parseprintf(DD_RAWDCF,("\n")); 445 446 if (cutoff) 447 { 448 highmax /= cutoff; 449 } 450 else 451 { 452 highmax = BITS-1; 453 } 454 455 span = cutoff = lowmax; 456 for (i = lowmax; i <= highmax; i++) 457 { 458 if (histbuf[cutoff] > histbuf[i]) 459 { 460 cutoff = i; 461 span = i; 462 } 463 else 464 if (histbuf[cutoff] == histbuf[i]) 465 { 466 span = i; 467 } 468 } 469 470 cutoff = (cutoff + span) / 2; 471 472 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: lower maximum %d, higher maximum %d, cutoff %d\n", lowmax, highmax, cutoff)); 473 474 s = (unsigned char *)buffer; 475 while (s < e) 476 { 477 if (*s == (unsigned char)~0) 478 { 479 *s = '?'; 480 } 481 else 482 { 483 *s = (*s >= cutoff) ? *b : *c; 484 } 485 s++; 486 if (*b) b++; 487 if (*c) c++; 488 } 489 490 *s = '\0'; 491 492 if (rtc == CVT_NONE) 493 { 494 rtc = convert_rawdcf(buffer, size, &dcfparameter, clock_time); 495 if (rtc == CVT_OK) 496 { 497 time_t newtime; 498 499 newtime = parse_to_unixtime(clock_time, &rtc); 500 if ((rtc == CVT_OK) && t) 501 { 502 if ((newtime - t->tcode) <= 600) /* require a successful telegram within last 10 minutes */ 503 { 504 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: recent timestamp check OK\n")); 505 clock_time->utctime = newtime; 506 } 507 else 508 { 509 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: recent timestamp check FAIL - ignore timestamp\n")); 510 rtc = CVT_SKIP; 511 } 512 t->tcode = newtime; 513 } 514 } 515 } 516 517 return rtc; 518 } 519 520 /* 521 * parse_pps_fnc_t pps_rawdcf 522 * 523 * currently a very stupid version - should be extended to decode 524 * also ones and zeros (which is easy) 525 */ 526 /*ARGSUSED*/ 527 static u_long 528 pps_rawdcf( 529 parse_t *parseio, 530 int status, 531 timestamp_t *ptime 532 ) 533 { 534 if (!status) /* negative edge for simpler wiring (Rx->DCD) */ 535 { 536 parseio->parse_dtime.parse_ptime = *ptime; 537 parseio->parse_dtime.parse_state |= PARSEB_PPS|PARSEB_S_PPS; 538 } 539 540 return CVT_NONE; 541 } 542 543 static long 544 calc_usecdiff( 545 timestamp_t *ref, 546 timestamp_t *base, 547 long offset 548 ) 549 { 550 struct timeval delta; 551 long delta_usec = 0; 552 553 #ifdef PARSEKERNEL 554 delta.tv_sec = ref->tv.tv_sec - offset - base->tv.tv_sec; 555 delta.tv_usec = ref->tv.tv_usec - base->tv.tv_usec; 556 if (delta.tv_usec < 0) 557 { 558 delta.tv_sec -= 1; 559 delta.tv_usec += 1000000; 560 } 561 #else 562 l_fp delt; 563 564 delt = ref->fp; 565 delt.l_i -= offset; 566 L_SUB(&delt, &base->fp); 567 TSTOTV(&delt, &delta); 568 #endif 569 570 delta_usec = 1000000 * (int32_t)delta.tv_sec + delta.tv_usec; 571 return delta_usec; 572 } 573 574 static u_long 575 snt_rawdcf( 576 parse_t *parseio, 577 timestamp_t *ptime 578 ) 579 { 580 /* 581 * only synthesize if all of following conditions are met: 582 * - CVT_OK parse_status (we have a time stamp base) 583 * - ABS(ptime - tminute - (parse_index - 1) sec) < 500ms (spaced by 1 sec +- 500ms) 584 * - minute marker is available (confirms minute raster as base) 585 */ 586 last_tcode_t *t = (last_tcode_t *)parseio->parse_pdata; 587 long delta_usec = -1; 588 589 if (t != NULL && t->tminute.tv.tv_sec != 0) { 590 delta_usec = calc_usecdiff(ptime, &t->tminute, parseio->parse_index - 1); 591 if (delta_usec < 0) 592 delta_usec = -delta_usec; 593 } 594 595 parseprintf(DD_RAWDCF,("parse: snt_rawdcf: synth for offset %d seconds - absolute usec error %ld\n", 596 parseio->parse_index - 1, delta_usec)); 597 598 if (((parseio->parse_dtime.parse_status & CVT_MASK) == CVT_OK) && 599 (delta_usec < 500000 && delta_usec >= 0)) /* only if minute marker is available */ 600 { 601 parseio->parse_dtime.parse_stime = *ptime; 602 603 #ifdef PARSEKERNEL 604 parseio->parse_dtime.parse_time.tv.tv_sec++; 605 #else 606 parseio->parse_dtime.parse_time.fp.l_ui++; 607 #endif 608 609 parseprintf(DD_RAWDCF,("parse: snt_rawdcf: time stamp synthesized offset %d seconds\n", parseio->parse_index - 1)); 610 611 return updatetimeinfo(parseio, parseio->parse_lstate); 612 } 613 return CVT_NONE; 614 } 615 616 /* 617 * parse_inp_fnc_t inp_rawdcf 618 * 619 * grab DCF77 data from input stream 620 */ 621 static u_long 622 inp_rawdcf( 623 parse_t *parseio, 624 char ch, 625 timestamp_t *tstamp 626 ) 627 { 628 static struct timeval timeout = { 1, 500000 }; /* 1.5 secongs denote second #60 */ 629 630 parseprintf(DD_PARSE, ("inp_rawdcf(0x%p, 0x%x, ...)\n", (void*)parseio, ch)); 631 632 parseio->parse_dtime.parse_stime = *tstamp; /* collect timestamp */ 633 634 if (parse_timedout(parseio, tstamp, &timeout)) 635 { 636 last_tcode_t *t = (last_tcode_t *)parseio->parse_pdata; 637 long delta_usec; 638 639 parseprintf(DD_RAWDCF, ("inp_rawdcf: time out seen\n")); 640 /* finish collection */ 641 (void) parse_end(parseio); 642 643 if (t != NULL) 644 { 645 /* remember minute start sample time if timeouts occur in minute raster */ 646 if (t->timeout.tv.tv_sec != 0) 647 { 648 delta_usec = calc_usecdiff(tstamp, &t->timeout, 60); 649 if (delta_usec < 0) 650 delta_usec = -delta_usec; 651 } 652 else 653 { 654 delta_usec = -1; 655 } 656 657 if (delta_usec < 500000 && delta_usec >= 0) 658 { 659 parseprintf(DD_RAWDCF, ("inp_rawdcf: timeout time difference %ld usec - minute marker set\n", delta_usec)); 660 /* collect minute markers only if spaced by 60 seconds */ 661 t->tminute = *tstamp; 662 } 663 else 664 { 665 parseprintf(DD_RAWDCF, ("inp_rawdcf: timeout time difference %ld usec - minute marker cleared\n", delta_usec)); 666 memset((char *)&t->tminute, 0, sizeof(t->tminute)); 667 } 668 t->timeout = *tstamp; 669 } 670 (void) parse_addchar(parseio, ch); 671 672 /* pass up to higher layers */ 673 return PARSE_INP_TIME; 674 } 675 else 676 { 677 unsigned int rtc; 678 679 rtc = parse_addchar(parseio, ch); 680 if (rtc == PARSE_INP_SKIP) 681 { 682 if (snt_rawdcf(parseio, tstamp) == CVT_OK) 683 return PARSE_INP_SYNTH; 684 } 685 return rtc; 686 } 687 } 688 689 #else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_RAWDCF) */ 690 int clk_rawdcf_bs; 691 #endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_RAWDCF) */ 692 693 /* 694 * History: 695 * 696 * clk_rawdcf.c,v 697 * Revision 4.18 2006/06/22 18:40:01 kardel 698 * clean up signedness (gcc 4) 699 * 700 * Revision 4.17 2006/01/22 16:01:55 kardel 701 * update version information 702 * 703 * Revision 4.16 2006/01/22 15:51:22 kardel 704 * generate reasonable timecode output on invalid input 705 * 706 * Revision 4.15 2005/08/06 19:17:06 kardel 707 * clean log output 708 * 709 * Revision 4.14 2005/08/06 17:39:40 kardel 710 * cleanup size handling wrt/ to buffer boundaries 711 * 712 * Revision 4.13 2005/04/16 17:32:10 kardel 713 * update copyright 714 * 715 * Revision 4.12 2004/11/14 15:29:41 kardel 716 * support PPSAPI, upgrade Copyright to Berkeley style 717 * 718 * Revision 4.9 1999/12/06 13:42:23 kardel 719 * transfer correctly converted time codes always into tcode 720 * 721 * Revision 4.8 1999/11/28 09:13:50 kardel 722 * RECON_4_0_98F 723 * 724 * Revision 4.7 1999/04/01 20:07:20 kardel 725 * added checking for minutie increment of timestamps in clk_rawdcf.c 726 * 727 * Revision 4.6 1998/06/14 21:09:37 kardel 728 * Sun acc cleanup 729 * 730 * Revision 4.5 1998/06/13 12:04:16 kardel 731 * fix SYSV clock name clash 732 * 733 * Revision 4.4 1998/06/12 15:22:28 kardel 734 * fix prototypes 735 * 736 * Revision 4.3 1998/06/06 18:33:36 kardel 737 * simplified condidional compile expression 738 * 739 * Revision 4.2 1998/05/24 11:04:18 kardel 740 * triggering PPS on negative edge for simpler wiring (Rx->DCD) 741 * 742 * Revision 4.1 1998/05/24 09:39:53 kardel 743 * implementation of the new IO handling model 744 * 745 * Revision 4.0 1998/04/10 19:45:30 kardel 746 * Start 4.0 release version numbering 747 * 748 * from V3 3.24 log info deleted 1998/04/11 kardel 749 * 750 */ 751