clk_rawdcf.c revision 1.2.22.3
1 /* $NetBSD: clk_rawdcf.c,v 1.2.22.3 2016/05/08 21:55:48 snj Exp $ */ 2 3 /* 4 * /src/NTP/REPOSITORY/ntp4-dev/libparse/clk_rawdcf.c,v 4.18 2006/06/22 18:40:01 kardel RELEASE_20060622_A 5 * 6 * clk_rawdcf.c,v 4.18 2006/06/22 18:40:01 kardel RELEASE_20060622_A 7 * 8 * Raw DCF77 pulse clock support 9 * 10 * Copyright (c) 1995-2015 by Frank Kardel <kardel <AT> ntp.org> 11 * Copyright (c) 1989-1994 by Frank Kardel, Friedrich-Alexander Universitaet Erlangen-Nuernberg, Germany 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the author nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 */ 38 39 #ifdef HAVE_CONFIG_H 40 # include <config.h> 41 #endif 42 43 #if defined(REFCLOCK) && defined(CLOCK_PARSE) && defined(CLOCK_RAWDCF) 44 45 #include "ntp_fp.h" 46 #include "timevalops.h" 47 #include "ntp_unixtime.h" 48 #include "ntp_calendar.h" 49 50 #include "parse.h" 51 #ifdef PARSESTREAM 52 # include <sys/parsestreams.h> 53 #endif 54 55 #ifndef PARSEKERNEL 56 # include "ntp_stdlib.h" 57 #endif 58 59 /* 60 * DCF77 raw time code 61 * 62 * From "Zur Zeit", Physikalisch-Technische Bundesanstalt (PTB), Braunschweig 63 * und Berlin, Maerz 1989 64 * 65 * Timecode transmission: 66 * AM: 67 * time marks are send every second except for the second before the 68 * next minute mark 69 * time marks consist of a reduction of transmitter power to 25% 70 * of the nominal level 71 * the falling edge is the time indication (on time) 72 * time marks of a 100ms duration constitute a logical 0 73 * time marks of a 200ms duration constitute a logical 1 74 * FM: 75 * see the spec. (basically a (non-)inverted psuedo random phase shift) 76 * 77 * Encoding: 78 * Second Contents 79 * 0 - 10 AM: free, FM: 0 80 * 11 - 14 free 81 * 15 R - "call bit" used to signalize irregularities in the control facilities 82 * (until 2003 indicated transmission via alternate antenna) 83 * 16 A1 - expect zone change (1 hour before) 84 * 17 - 18 Z1,Z2 - time zone 85 * 0 0 illegal 86 * 0 1 MEZ (MET) 87 * 1 0 MESZ (MED, MET DST) 88 * 1 1 illegal 89 * 19 A2 - expect leap insertion/deletion (1 hour before) 90 * 20 S - start of time code (1) 91 * 21 - 24 M1 - BCD (lsb first) Minutes 92 * 25 - 27 M10 - BCD (lsb first) 10 Minutes 93 * 28 P1 - Minute Parity (even) 94 * 29 - 32 H1 - BCD (lsb first) Hours 95 * 33 - 34 H10 - BCD (lsb first) 10 Hours 96 * 35 P2 - Hour Parity (even) 97 * 36 - 39 D1 - BCD (lsb first) Days 98 * 40 - 41 D10 - BCD (lsb first) 10 Days 99 * 42 - 44 DW - BCD (lsb first) day of week (1: Monday -> 7: Sunday) 100 * 45 - 49 MO - BCD (lsb first) Month 101 * 50 MO0 - 10 Months 102 * 51 - 53 Y1 - BCD (lsb first) Years 103 * 54 - 57 Y10 - BCD (lsb first) 10 Years 104 * 58 P3 - Date Parity (even) 105 * 59 - usually missing (minute indication), except for leap insertion 106 */ 107 108 static parse_pps_fnc_t pps_rawdcf; 109 static parse_cvt_fnc_t cvt_rawdcf; 110 static parse_inp_fnc_t inp_rawdcf; 111 112 typedef struct last_tcode { 113 time_t tcode; /* last converted time code */ 114 timestamp_t tminute; /* sample time for minute start */ 115 timestamp_t timeout; /* last timeout timestamp */ 116 } last_tcode_t; 117 118 #define BUFFER_MAX 61 119 120 clockformat_t clock_rawdcf = 121 { 122 inp_rawdcf, /* DCF77 input handling */ 123 cvt_rawdcf, /* raw dcf input conversion */ 124 pps_rawdcf, /* examining PPS information */ 125 0, /* no private configuration data */ 126 "RAW DCF77 Timecode", /* direct decoding / time synthesis */ 127 128 BUFFER_MAX, /* bit buffer */ 129 sizeof(last_tcode_t) 130 }; 131 132 static struct dcfparam 133 { 134 const unsigned char *onebits; 135 const unsigned char *zerobits; 136 } dcfparameter = 137 { 138 (const unsigned char *)"###############RADMLS1248124P124812P1248121241248112481248P??", /* 'ONE' representation */ 139 (const unsigned char *)"--------------------s-------p------p----------------------p__" /* 'ZERO' representation */ 140 }; 141 142 static struct rawdcfcode 143 { 144 char offset; /* start bit */ 145 } rawdcfcode[] = 146 { 147 { 0 }, { 15 }, { 16 }, { 17 }, { 19 }, { 20 }, { 21 }, { 25 }, { 28 }, { 29 }, 148 { 33 }, { 35 }, { 36 }, { 40 }, { 42 }, { 45 }, { 49 }, { 50 }, { 54 }, { 58 }, { 59 } 149 }; 150 151 #define DCF_M 0 152 #define DCF_R 1 153 #define DCF_A1 2 154 #define DCF_Z 3 155 #define DCF_A2 4 156 #define DCF_S 5 157 #define DCF_M1 6 158 #define DCF_M10 7 159 #define DCF_P1 8 160 #define DCF_H1 9 161 #define DCF_H10 10 162 #define DCF_P2 11 163 #define DCF_D1 12 164 #define DCF_D10 13 165 #define DCF_DW 14 166 #define DCF_MO 15 167 #define DCF_MO0 16 168 #define DCF_Y1 17 169 #define DCF_Y10 18 170 #define DCF_P3 19 171 172 static struct partab 173 { 174 char offset; /* start bit of parity field */ 175 } partab[] = 176 { 177 { 21 }, { 29 }, { 36 }, { 59 } 178 }; 179 180 #define DCF_P_P1 0 181 #define DCF_P_P2 1 182 #define DCF_P_P3 2 183 184 #define DCF_Z_MET 0x2 185 #define DCF_Z_MED 0x1 186 187 static u_long 188 ext_bf( 189 unsigned char *buf, 190 int idx, 191 const unsigned char *zero 192 ) 193 { 194 u_long sum = 0; 195 int i, first; 196 197 first = rawdcfcode[idx].offset; 198 199 for (i = rawdcfcode[idx+1].offset - 1; i >= first; i--) 200 { 201 sum <<= 1; 202 sum |= (buf[i] != zero[i]); 203 } 204 return sum; 205 } 206 207 static unsigned 208 pcheck( 209 unsigned char *buf, 210 int idx, 211 const unsigned char *zero 212 ) 213 { 214 int i,last; 215 unsigned psum = 1; 216 217 last = partab[idx+1].offset; 218 219 for (i = partab[idx].offset; i < last; i++) 220 psum ^= (buf[i] != zero[i]); 221 222 return psum; 223 } 224 225 static u_long 226 convert_rawdcf( 227 unsigned char *buffer, 228 int size, 229 struct dcfparam *dcfprm, 230 clocktime_t *clock_time 231 ) 232 { 233 unsigned char *s = buffer; 234 const unsigned char *b = dcfprm->onebits; 235 const unsigned char *c = dcfprm->zerobits; 236 int i; 237 238 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: \"%.*s\"\n", size, buffer)); 239 240 if (size < 57) 241 { 242 #ifndef PARSEKERNEL 243 msyslog(LOG_ERR, "parse: convert_rawdcf: INCOMPLETE DATA - time code only has %d bits", size); 244 #endif 245 return CVT_FAIL|CVT_BADFMT; 246 } 247 248 for (i = 0; i < size; i++) 249 { 250 if ((*s != *b) && (*s != *c)) 251 { 252 /* 253 * we only have two types of bytes (ones and zeros) 254 */ 255 #ifndef PARSEKERNEL 256 msyslog(LOG_ERR, "parse: convert_rawdcf: BAD DATA - no conversion"); 257 #endif 258 return CVT_FAIL|CVT_BADFMT; 259 } 260 if (*b) b++; 261 if (*c) c++; 262 s++; 263 } 264 265 /* 266 * check Start and Parity bits 267 */ 268 if ((ext_bf(buffer, DCF_S, dcfprm->zerobits) == 1) && 269 pcheck(buffer, DCF_P_P1, dcfprm->zerobits) && 270 pcheck(buffer, DCF_P_P2, dcfprm->zerobits) && 271 pcheck(buffer, DCF_P_P3, dcfprm->zerobits)) 272 { 273 /* 274 * buffer OK 275 */ 276 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: parity check passed\n")); 277 278 clock_time->flags = PARSEB_S_CALLBIT|PARSEB_S_LEAP; 279 clock_time->utctime= 0; 280 clock_time->usecond= 0; 281 clock_time->second = 0; 282 clock_time->minute = ext_bf(buffer, DCF_M10, dcfprm->zerobits); 283 clock_time->minute = TIMES10(clock_time->minute) + ext_bf(buffer, DCF_M1, dcfprm->zerobits); 284 clock_time->hour = ext_bf(buffer, DCF_H10, dcfprm->zerobits); 285 clock_time->hour = TIMES10(clock_time->hour) + ext_bf(buffer, DCF_H1, dcfprm->zerobits); 286 clock_time->day = ext_bf(buffer, DCF_D10, dcfprm->zerobits); 287 clock_time->day = TIMES10(clock_time->day) + ext_bf(buffer, DCF_D1, dcfprm->zerobits); 288 clock_time->month = ext_bf(buffer, DCF_MO0, dcfprm->zerobits); 289 clock_time->month = TIMES10(clock_time->month) + ext_bf(buffer, DCF_MO, dcfprm->zerobits); 290 clock_time->year = ext_bf(buffer, DCF_Y10, dcfprm->zerobits); 291 clock_time->year = TIMES10(clock_time->year) + ext_bf(buffer, DCF_Y1, dcfprm->zerobits); 292 293 switch (ext_bf(buffer, DCF_Z, dcfprm->zerobits)) 294 { 295 case DCF_Z_MET: 296 clock_time->utcoffset = -1*60*60; 297 break; 298 299 case DCF_Z_MED: 300 clock_time->flags |= PARSEB_DST; 301 clock_time->utcoffset = -2*60*60; 302 break; 303 304 default: 305 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: BAD TIME ZONE\n")); 306 return CVT_FAIL|CVT_BADFMT; 307 } 308 309 if (ext_bf(buffer, DCF_A1, dcfprm->zerobits)) 310 clock_time->flags |= PARSEB_ANNOUNCE; 311 312 if (ext_bf(buffer, DCF_A2, dcfprm->zerobits)) 313 clock_time->flags |= PARSEB_LEAPADD; /* default: DCF77 data format deficiency */ 314 315 if (ext_bf(buffer, DCF_R, dcfprm->zerobits)) 316 clock_time->flags |= PARSEB_CALLBIT; 317 318 parseprintf(DD_RAWDCF,("parse: convert_rawdcf: TIME CODE OK: %02d:%02d, %02d.%02d.%02d, flags 0x%lx\n", 319 (int)clock_time->hour, (int)clock_time->minute, (int)clock_time->day, (int)clock_time->month,(int) clock_time->year, 320 (u_long)clock_time->flags)); 321 return CVT_OK; 322 } 323 else 324 { 325 /* 326 * bad format - not for us 327 */ 328 #ifndef PARSEKERNEL 329 msyslog(LOG_ERR, "parse: convert_rawdcf: start bit / parity check FAILED for \"%.*s\"", size, buffer); 330 #endif 331 return CVT_FAIL|CVT_BADFMT; 332 } 333 } 334 335 /* 336 * parse_cvt_fnc_t cvt_rawdcf 337 * raw dcf input routine - needs to fix up 50 baud 338 * characters for 1/0 decision 339 */ 340 static u_long 341 cvt_rawdcf( 342 unsigned char *buffer, 343 int size, 344 struct format *param, 345 clocktime_t *clock_time, 346 void *local 347 ) 348 { 349 last_tcode_t *t = (last_tcode_t *)local; 350 unsigned char *s = (unsigned char *)buffer; 351 unsigned char *e = s + size; 352 const unsigned char *b = dcfparameter.onebits; 353 const unsigned char *c = dcfparameter.zerobits; 354 u_long rtc = CVT_NONE; 355 unsigned int i, lowmax, highmax, cutoff, span; 356 #define BITS 9 357 unsigned char histbuf[BITS]; 358 /* 359 * the input buffer contains characters with runs of consecutive 360 * bits set. These set bits are an indication of the DCF77 pulse 361 * length. We assume that we receive the pulse at 50 Baud. Thus 362 * a 100ms pulse would generate a 4 bit train (20ms per bit and 363 * start bit) 364 * a 200ms pulse would create all zeroes (and probably a frame error) 365 */ 366 367 for (i = 0; i < BITS; i++) 368 { 369 histbuf[i] = 0; 370 } 371 372 cutoff = 0; 373 lowmax = 0; 374 375 while (s < e) 376 { 377 unsigned int ch = *s ^ 0xFF; 378 /* 379 * these lines are left as an excercise to the reader 8-) 380 */ 381 if (!((ch+1) & ch) || !*s) 382 { 383 384 for (i = 0; ch; i++) 385 { 386 ch >>= 1; 387 } 388 389 *s = (unsigned char) i; 390 histbuf[i]++; 391 cutoff += i; 392 lowmax++; 393 } 394 else 395 { 396 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: character check for 0x%x@%d FAILED\n", *s, (int)(s - (unsigned char *)buffer))); 397 *s = (unsigned char)~0; 398 rtc = CVT_FAIL|CVT_BADFMT; 399 } 400 s++; 401 } 402 403 if (lowmax) 404 { 405 cutoff /= lowmax; 406 } 407 else 408 { 409 cutoff = 4; /* doesn't really matter - it'll fail anyway, but gives error output */ 410 } 411 412 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: average bit count: %d\n", cutoff)); 413 414 lowmax = 0; 415 highmax = 0; 416 417 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: histogram:")); 418 for (i = 0; i <= cutoff; i++) 419 { 420 lowmax+=histbuf[i] * i; 421 highmax += histbuf[i]; 422 parseprintf(DD_RAWDCF,(" %d", histbuf[i])); 423 } 424 parseprintf(DD_RAWDCF, (" <M>")); 425 426 lowmax += highmax / 2; 427 428 if (highmax) 429 { 430 lowmax /= highmax; 431 } 432 else 433 { 434 lowmax = 0; 435 } 436 437 highmax = 0; 438 cutoff = 0; 439 440 for (; i < BITS; i++) 441 { 442 highmax+=histbuf[i] * i; 443 cutoff +=histbuf[i]; 444 parseprintf(DD_RAWDCF,(" %d", histbuf[i])); 445 } 446 parseprintf(DD_RAWDCF,("\n")); 447 448 if (cutoff) 449 { 450 highmax /= cutoff; 451 } 452 else 453 { 454 highmax = BITS-1; 455 } 456 457 span = cutoff = lowmax; 458 for (i = lowmax; i <= highmax; i++) 459 { 460 if (histbuf[cutoff] > histbuf[i]) 461 { 462 cutoff = i; 463 span = i; 464 } 465 else 466 if (histbuf[cutoff] == histbuf[i]) 467 { 468 span = i; 469 } 470 } 471 472 cutoff = (cutoff + span) / 2; 473 474 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: lower maximum %d, higher maximum %d, cutoff %d\n", lowmax, highmax, cutoff)); 475 476 s = (unsigned char *)buffer; 477 while (s < e) 478 { 479 if (*s == (unsigned char)~0) 480 { 481 *s = '?'; 482 } 483 else 484 { 485 *s = (*s >= cutoff) ? *b : *c; 486 } 487 s++; 488 if (*b) b++; 489 if (*c) c++; 490 } 491 492 *s = '\0'; 493 494 if (rtc == CVT_NONE) 495 { 496 rtc = convert_rawdcf(buffer, size, &dcfparameter, clock_time); 497 if (rtc == CVT_OK) 498 { 499 time_t newtime; 500 501 newtime = parse_to_unixtime(clock_time, &rtc); 502 if ((rtc == CVT_OK) && t) 503 { 504 if ((newtime - t->tcode) <= 600) /* require a successful telegram within last 10 minutes */ 505 { 506 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: recent timestamp check OK\n")); 507 clock_time->utctime = newtime; 508 } 509 else 510 { 511 parseprintf(DD_RAWDCF,("parse: cvt_rawdcf: recent timestamp check FAIL - ignore timestamp\n")); 512 rtc = CVT_SKIP; 513 } 514 t->tcode = newtime; 515 } 516 } 517 } 518 519 return rtc; 520 } 521 522 /* 523 * parse_pps_fnc_t pps_rawdcf 524 * 525 * currently a very stupid version - should be extended to decode 526 * also ones and zeros (which is easy) 527 */ 528 /*ARGSUSED*/ 529 static u_long 530 pps_rawdcf( 531 parse_t *parseio, 532 int status, 533 timestamp_t *ptime 534 ) 535 { 536 if (!status) /* negative edge for simpler wiring (Rx->DCD) */ 537 { 538 parseio->parse_dtime.parse_ptime = *ptime; 539 parseio->parse_dtime.parse_state |= PARSEB_PPS|PARSEB_S_PPS; 540 } 541 542 return CVT_NONE; 543 } 544 545 static long 546 calc_usecdiff( 547 timestamp_t *ref, 548 timestamp_t *base, 549 long offset 550 ) 551 { 552 struct timeval delta; 553 long delta_usec = 0; 554 555 #ifdef PARSEKERNEL 556 delta.tv_sec = ref->tv.tv_sec - offset - base->tv.tv_sec; 557 delta.tv_usec = ref->tv.tv_usec - base->tv.tv_usec; 558 if (delta.tv_usec < 0) 559 { 560 delta.tv_sec -= 1; 561 delta.tv_usec += 1000000; 562 } 563 #else 564 l_fp delt; 565 566 delt = ref->fp; 567 delt.l_i -= offset; 568 L_SUB(&delt, &base->fp); 569 TSTOTV(&delt, &delta); 570 #endif 571 572 delta_usec = 1000000 * (int32_t)delta.tv_sec + delta.tv_usec; 573 return delta_usec; 574 } 575 576 static u_long 577 snt_rawdcf( 578 parse_t *parseio, 579 timestamp_t *ptime 580 ) 581 { 582 /* 583 * only synthesize if all of following conditions are met: 584 * - CVT_OK parse_status (we have a time stamp base) 585 * - ABS(ptime - tminute - (parse_index - 1) sec) < 500ms (spaced by 1 sec +- 500ms) 586 * - minute marker is available (confirms minute raster as base) 587 */ 588 last_tcode_t *t = (last_tcode_t *)parseio->parse_pdata; 589 long delta_usec = -1; 590 591 if (t != NULL && t->tminute.tv.tv_sec != 0) { 592 delta_usec = calc_usecdiff(ptime, &t->tminute, parseio->parse_index - 1); 593 if (delta_usec < 0) 594 delta_usec = -delta_usec; 595 } 596 597 parseprintf(DD_RAWDCF,("parse: snt_rawdcf: synth for offset %d seconds - absolute usec error %ld\n", 598 parseio->parse_index - 1, delta_usec)); 599 600 if (((parseio->parse_dtime.parse_status & CVT_MASK) == CVT_OK) && 601 (delta_usec < 500000 && delta_usec >= 0)) /* only if minute marker is available */ 602 { 603 parseio->parse_dtime.parse_stime = *ptime; 604 605 #ifdef PARSEKERNEL 606 parseio->parse_dtime.parse_time.tv.tv_sec++; 607 #else 608 parseio->parse_dtime.parse_time.fp.l_ui++; 609 #endif 610 611 parseprintf(DD_RAWDCF,("parse: snt_rawdcf: time stamp synthesized offset %d seconds\n", parseio->parse_index - 1)); 612 613 return updatetimeinfo(parseio, parseio->parse_lstate); 614 } 615 return CVT_NONE; 616 } 617 618 /* 619 * parse_inp_fnc_t inp_rawdcf 620 * 621 * grab DCF77 data from input stream 622 */ 623 static u_long 624 inp_rawdcf( 625 parse_t *parseio, 626 char ch, 627 timestamp_t *tstamp 628 ) 629 { 630 static struct timeval timeout = { 1, 500000 }; /* 1.5 secongs denote second #60 */ 631 632 parseprintf(DD_PARSE, ("inp_rawdcf(0x%p, 0x%x, ...)\n", (void*)parseio, ch)); 633 634 parseio->parse_dtime.parse_stime = *tstamp; /* collect timestamp */ 635 636 if (parse_timedout(parseio, tstamp, &timeout)) 637 { 638 last_tcode_t *t = (last_tcode_t *)parseio->parse_pdata; 639 long delta_usec; 640 641 parseprintf(DD_RAWDCF, ("inp_rawdcf: time out seen\n")); 642 /* finish collection */ 643 (void) parse_end(parseio); 644 645 if (t != NULL) 646 { 647 /* remember minute start sample time if timeouts occur in minute raster */ 648 if (t->timeout.tv.tv_sec != 0) 649 { 650 delta_usec = calc_usecdiff(tstamp, &t->timeout, 60); 651 if (delta_usec < 0) 652 delta_usec = -delta_usec; 653 } 654 else 655 { 656 delta_usec = -1; 657 } 658 659 if (delta_usec < 500000 && delta_usec >= 0) 660 { 661 parseprintf(DD_RAWDCF, ("inp_rawdcf: timeout time difference %ld usec - minute marker set\n", delta_usec)); 662 /* collect minute markers only if spaced by 60 seconds */ 663 t->tminute = *tstamp; 664 } 665 else 666 { 667 parseprintf(DD_RAWDCF, ("inp_rawdcf: timeout time difference %ld usec - minute marker cleared\n", delta_usec)); 668 memset((char *)&t->tminute, 0, sizeof(t->tminute)); 669 } 670 t->timeout = *tstamp; 671 } 672 (void) parse_addchar(parseio, ch); 673 674 /* pass up to higher layers */ 675 return PARSE_INP_TIME; 676 } 677 else 678 { 679 unsigned int rtc; 680 681 rtc = parse_addchar(parseio, ch); 682 if (rtc == PARSE_INP_SKIP) 683 { 684 if (snt_rawdcf(parseio, tstamp) == CVT_OK) 685 return PARSE_INP_SYNTH; 686 } 687 return rtc; 688 } 689 } 690 691 #else /* not (REFCLOCK && CLOCK_PARSE && CLOCK_RAWDCF) */ 692 int clk_rawdcf_bs; 693 #endif /* not (REFCLOCK && CLOCK_PARSE && CLOCK_RAWDCF) */ 694 695 /* 696 * History: 697 * 698 * clk_rawdcf.c,v 699 * Revision 4.18 2006/06/22 18:40:01 kardel 700 * clean up signedness (gcc 4) 701 * 702 * Revision 4.17 2006/01/22 16:01:55 kardel 703 * update version information 704 * 705 * Revision 4.16 2006/01/22 15:51:22 kardel 706 * generate reasonable timecode output on invalid input 707 * 708 * Revision 4.15 2005/08/06 19:17:06 kardel 709 * clean log output 710 * 711 * Revision 4.14 2005/08/06 17:39:40 kardel 712 * cleanup size handling wrt/ to buffer boundaries 713 * 714 * Revision 4.13 2005/04/16 17:32:10 kardel 715 * update copyright 716 * 717 * Revision 4.12 2004/11/14 15:29:41 kardel 718 * support PPSAPI, upgrade Copyright to Berkeley style 719 * 720 * Revision 4.9 1999/12/06 13:42:23 kardel 721 * transfer correctly converted time codes always into tcode 722 * 723 * Revision 4.8 1999/11/28 09:13:50 kardel 724 * RECON_4_0_98F 725 * 726 * Revision 4.7 1999/04/01 20:07:20 kardel 727 * added checking for minutie increment of timestamps in clk_rawdcf.c 728 * 729 * Revision 4.6 1998/06/14 21:09:37 kardel 730 * Sun acc cleanup 731 * 732 * Revision 4.5 1998/06/13 12:04:16 kardel 733 * fix SYSV clock name clash 734 * 735 * Revision 4.4 1998/06/12 15:22:28 kardel 736 * fix prototypes 737 * 738 * Revision 4.3 1998/06/06 18:33:36 kardel 739 * simplified condidional compile expression 740 * 741 * Revision 4.2 1998/05/24 11:04:18 kardel 742 * triggering PPS on negative edge for simpler wiring (Rx->DCD) 743 * 744 * Revision 4.1 1998/05/24 09:39:53 kardel 745 * implementation of the new IO handling model 746 * 747 * Revision 4.0 1998/04/10 19:45:30 kardel 748 * Start 4.0 release version numbering 749 * 750 * from V3 3.24 log info deleted 1998/04/11 kardel 751 * 752 */ 753
Indexes created Sat May 02 00:23:24 UTC 2026