git.zerfleddert.de Git - proxmark3-svn/blob - client/cmdlf.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Low frequency commands
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdlib.h>
  13 #include <string.h>
  14 #include <limits.h>
  15 #include "proxmark3.h"
  16 #include "data.h"
  17 #include "graph.h"
  18 #include "ui.h"
  19 #include "cmdparser.h"
  20 #include "cmdmain.h"
  21 #include "cmddata.h"
  22 #include "util.h"
  23 #include "cmdlf.h"
  24 #include "cmdlfhid.h"
  25 #include "cmdlfawid.h"
  26 #include "cmdlfti.h"
  27 #include "cmdlfem4x.h"
  28 #include "cmdlfhitag.h"
  29 #include "cmdlft55xx.h"
  30 #include "cmdlfpcf7931.h"
  31 #include "cmdlfio.h"
  32 #include "lfdemod.h"
  33 #include "cmdlfviking.h"
  34 static int CmdHelp(const char *Cmd);
  35
  36
  37 int usage_lf_cmdread()
  38 {
  39         PrintAndLog("Usage: lf cmdread  <delay off>  <zero> <one> <cmdbytes> [H] ");
  40         PrintAndLog("Options:        ");
  41         PrintAndLog("       h             This help");
  42         PrintAndLog("       L             Low frequency (125 KHz)");
  43         PrintAndLog("       H             High frequency (134 KHz)");
  44         PrintAndLog("       H             delay OFF");
  45         PrintAndLog("       H             time period ZERO");
  46         PrintAndLog("       H             time period ONE");
  47         PrintAndLog("Examples:");
  48         PrintAndLog("      lf cmdread 80 100 200 11000");
  49         PrintAndLog("      lf cmdread 80 100 100 11000 H");
  50         return 0;
  51 }
  52
  53 /* send a command before reading */
  54 int CmdLFCommandRead(const char *Cmd)
  55 {
  56         static char dummy[3] = {0x20,0x00,0x00};
  57         bool errors = FALSE;
  58         uint8_t divisor = 0; //125khz
  59         uint8_t cmdp =0;
  60         while(param_getchar(Cmd, cmdp) != 0x00)
  61         {
  62                 switch(param_getchar(Cmd, cmdp))
  63                 {
  64                 case 'h':
  65                         return usage_lf_cmdread();
  66                 case 'H':
  67                         divisor = 88;
  68                         cmdp++;
  69                         break;
  70                 case 'a':
  71                         //param_getchar(Cmd, cmdp+1) == '1';
  72                         cmdp+=2;
  73                         break;
  74                 default:
  75                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
  76                         errors = 1;
  77                         break;
  78                 }
  79                 if(errors) break;
  80         }
  81         // No args
  82         if(cmdp == 0) errors = 1;
  83
  84         //Validations
  85         if(errors) return usage_lf_cmdread();
  86
  87         UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
  88
  89         sscanf(Cmd, "%"lli" %"lli" %"lli" %s %s", &c.arg[0], &c.arg[1], &c.arg[2],(char*)(&c.d.asBytes),(char*)(&dummy+1));
  90
  91         // in case they specified 'h'
  92         strcpy((char *)&c.d.asBytes + strlen((char *)c.d.asBytes), dummy);
  93
  94         PrintAndLog("ICE: %d %s -- %s", strlen((char *)c.d.asBytes) ,dummy, c.d.asBytes);
  95         clearCommandBuffer();
  96         SendCommand(&c);
  97         return 0;
  98 }
  99
 100 int CmdFlexdemod(const char *Cmd)
 101 {
 102   int i;
 103   for (i = 0; i < GraphTraceLen; ++i) {
 104     if (GraphBuffer[i] < 0) {
 105       GraphBuffer[i] = -1;
 106     } else {
 107       GraphBuffer[i] = 1;
 108     }
 109   }
 110
 111 #define LONG_WAIT 100
 112   int start;
 113   for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
 114     int first = GraphBuffer[start];
 115     for (i = start; i < start + LONG_WAIT; i++) {
 116       if (GraphBuffer[i] != first) {
 117         break;
 118       }
 119     }
 120     if (i == (start + LONG_WAIT)) {
 121       break;
 122     }
 123   }
 124   if (start == GraphTraceLen - LONG_WAIT) {
 125     PrintAndLog("nothing to wait for");
 126     return 0;
 127   }
 128
 129   GraphBuffer[start] = 2;
 130   GraphBuffer[start+1] = -2;
 131         uint8_t bits[64] = {0x00};
 132
 133         int bit, sum;
 134   i = start;
 135   for (bit = 0; bit < 64; bit++) {
 136                 sum = 0;
 137                 for (int j = 0; j < 16; j++) {
 138       sum += GraphBuffer[i++];
 139     }
 140
 141                 bits[bit] = (sum > 0) ? 1 : 0;
 142
 143     PrintAndLog("bit %d sum %d", bit, sum);
 144   }
 145
 146   for (bit = 0; bit < 64; bit++) {
 147     int j;
 148     int sum = 0;
 149     for (j = 0; j < 16; j++) {
 150       sum += GraphBuffer[i++];
 151     }
 152     if (sum > 0 && bits[bit] != 1) {
 153       PrintAndLog("oops1 at %d", bit);
 154     }
 155     if (sum < 0 && bits[bit] != 0) {
 156       PrintAndLog("oops2 at %d", bit);
 157     }
 158   }
 159
 160         // HACK writing back to graphbuffer.
 161   GraphTraceLen = 32*64;
 162   i = 0;
 163   int phase = 0;
 164   for (bit = 0; bit < 64; bit++) {
 165
 166                 phase = (bits[bit] == 0) ? 0 : 1;
 167
 168     int j;
 169     for (j = 0; j < 32; j++) {
 170       GraphBuffer[i++] = phase;
 171       phase = !phase;
 172     }
 173   }
 174
 175   RepaintGraphWindow();
 176   return 0;
 177 }
 178
 179 int CmdIndalaDemod(const char *Cmd)
 180 {
 181   // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
 182
 183   int state = -1;
 184   int count = 0;
 185   int i, j;
 186
 187   // worst case with GraphTraceLen=64000 is < 4096
 188   // under normal conditions it's < 2048
 189
 190   uint8_t rawbits[4096];
 191   int rawbit = 0;
 192   int worst = 0, worstPos = 0;
 193  // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
 194   for (i = 0; i < GraphTraceLen-1; i += 2) {
 195     count += 1;
 196     if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
 197       if (state == 0) {
 198         for (j = 0; j <  count - 8; j += 16) {
 199           rawbits[rawbit++] = 0;
 200         }
 201         if ((abs(count - j)) > worst) {
 202           worst = abs(count - j);
 203           worstPos = i;
 204         }
 205       }
 206       state = 1;
 207       count = 0;
 208     } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
 209       if (state == 1) {
 210         for (j = 0; j <  count - 8; j += 16) {
 211           rawbits[rawbit++] = 1;
 212         }
 213         if ((abs(count - j)) > worst) {
 214           worst = abs(count - j);
 215           worstPos = i;
 216         }
 217       }
 218       state = 0;
 219       count = 0;
 220     }
 221   }
 222
 223   if (rawbit>0){
 224     PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
 225     PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
 226         } else {
 227                 return 0;
 228         }
 229
 230   // Finding the start of a UID
 231   int uidlen, long_wait;
 232   if (strcmp(Cmd, "224") == 0) {
 233     uidlen = 224;
 234     long_wait = 30;
 235   } else {
 236     uidlen = 64;
 237     long_wait = 29;
 238   }
 239
 240   int start;
 241   int first = 0;
 242   for (start = 0; start <= rawbit - uidlen; start++) {
 243     first = rawbits[start];
 244     for (i = start; i < start + long_wait; i++) {
 245       if (rawbits[i] != first) {
 246         break;
 247       }
 248     }
 249     if (i == (start + long_wait)) {
 250       break;
 251     }
 252   }
 253
 254   if (start == rawbit - uidlen + 1) {
 255     PrintAndLog("nothing to wait for");
 256     return 0;
 257   }
 258
 259   // Inverting signal if needed
 260   if (first == 1) {
 261     for (i = start; i < rawbit; i++) {
 262       rawbits[i] = !rawbits[i];
 263     }
 264   }
 265
 266   // Dumping UID
 267         uint8_t bits[224] = {0x00};
 268         char showbits[225] = {0x00};
 269   int bit;
 270   i = start;
 271   int times = 0;
 272
 273   if (uidlen > rawbit) {
 274     PrintAndLog("Warning: not enough raw bits to get a full UID");
 275     for (bit = 0; bit < rawbit; bit++) {
 276       bits[bit] = rawbits[i++];
 277       // As we cannot know the parity, let's use "." and "/"
 278       showbits[bit] = '.' + bits[bit];
 279     }
 280     showbits[bit+1]='\0';
 281     PrintAndLog("Partial UID=%s", showbits);
 282     return 0;
 283   } else {
 284     for (bit = 0; bit < uidlen; bit++) {
 285       bits[bit] = rawbits[i++];
 286       showbits[bit] = '0' + bits[bit];
 287     }
 288     times = 1;
 289   }
 290
 291   //convert UID to HEX
 292   uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 293   int idx;
 294         uid1 = uid2 = 0;
 295
 296   if (uidlen==64){
 297     for( idx=0; idx<64; idx++) {
 298         if (showbits[idx] == '0') {
 299         uid1=(uid1<<1)|(uid2>>31);
 300         uid2=(uid2<<1)|0;
 301         } else {
 302         uid1=(uid1<<1)|(uid2>>31);
 303         uid2=(uid2<<1)|1;
 304         }
 305       }
 306     PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
 307   }
 308   else {
 309                 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
 310
 311     for( idx=0; idx<224; idx++) {
 312         uid1=(uid1<<1)|(uid2>>31);
 313         uid2=(uid2<<1)|(uid3>>31);
 314         uid3=(uid3<<1)|(uid4>>31);
 315         uid4=(uid4<<1)|(uid5>>31);
 316         uid5=(uid5<<1)|(uid6>>31);
 317         uid6=(uid6<<1)|(uid7>>31);
 318
 319                         if (showbits[idx] == '0')
 320                                 uid7 = (uid7<<1) | 0;
 321                         else
 322                                 uid7 = (uid7<<1) | 1;
 323       }
 324     PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 325   }
 326
 327   // Checking UID against next occurrences
 328     int failed = 0;
 329         for (; i + uidlen <= rawbit;) {
 330                 failed = 0;
 331     for (bit = 0; bit < uidlen; bit++) {
 332       if (bits[bit] != rawbits[i++]) {
 333         failed = 1;
 334         break;
 335       }
 336     }
 337     if (failed == 1) {
 338       break;
 339     }
 340     times += 1;
 341   }
 342
 343   PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
 344
 345   // Remodulating for tag cloning
 346         // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
 347         // since this changes graphbuffer data.
 348   GraphTraceLen = 32*uidlen;
 349   i = 0;
 350   int phase = 0;
 351   for (bit = 0; bit < uidlen; bit++) {
 352     if (bits[bit] == 0) {
 353       phase = 0;
 354     } else {
 355       phase = 1;
 356     }
 357     int j;
 358     for (j = 0; j < 32; j++) {
 359       GraphBuffer[i++] = phase;
 360       phase = !phase;
 361     }
 362   }
 363
 364   RepaintGraphWindow();
 365   return 1;
 366 }
 367
 368 int CmdIndalaClone(const char *Cmd)
 369 {
 370   UsbCommand c;
 371         unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 372
 373         uid1 =  uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
 374   int n = 0, i = 0;
 375
 376   if (strchr(Cmd,'l') != 0) {
 377     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 378       uid1 = (uid1 << 4) | (uid2 >> 28);
 379       uid2 = (uid2 << 4) | (uid3 >> 28);
 380       uid3 = (uid3 << 4) | (uid4 >> 28);
 381       uid4 = (uid4 << 4) | (uid5 >> 28);
 382       uid5 = (uid5 << 4) | (uid6 >> 28);
 383       uid6 = (uid6 << 4) | (uid7 >> 28);
 384         uid7 = (uid7 << 4) | (n & 0xf);
 385     }
 386     PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 387     c.cmd = CMD_INDALA_CLONE_TAG_L;
 388     c.d.asDwords[0] = uid1;
 389     c.d.asDwords[1] = uid2;
 390     c.d.asDwords[2] = uid3;
 391     c.d.asDwords[3] = uid4;
 392     c.d.asDwords[4] = uid5;
 393     c.d.asDwords[5] = uid6;
 394     c.d.asDwords[6] = uid7;
 395         } else {
 396     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 397       uid1 = (uid1 << 4) | (uid2 >> 28);
 398       uid2 = (uid2 << 4) | (n & 0xf);
 399     }
 400     PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
 401     c.cmd = CMD_INDALA_CLONE_TAG;
 402     c.arg[0] = uid1;
 403     c.arg[1] = uid2;
 404   }
 405
 406   SendCommand(&c);
 407   return 0;
 408 }
 409
 410 int usage_lf_read()
 411 {
 412         PrintAndLog("Usage: lf read");
 413         PrintAndLog("Options:        ");
 414         PrintAndLog("       h            This help");
 415         PrintAndLog("       s            silent run no printout");
 416         PrintAndLog("This function takes no arguments. ");
 417         PrintAndLog("Use 'lf config' to set parameters.");
 418         return 0;
 419 }
 420 int usage_lf_snoop()
 421 {
 422         PrintAndLog("Usage: lf snoop");
 423         PrintAndLog("Options:        ");
 424         PrintAndLog("       h            This help");
 425         PrintAndLog("This function takes no arguments. ");
 426         PrintAndLog("Use 'lf config' to set parameters.");
 427         return 0;
 428 }
 429
 430 int usage_lf_config()
 431 {
 432         PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
 433         PrintAndLog("Options:        ");
 434         PrintAndLog("       h             This help");
 435         PrintAndLog("       L             Low frequency (125 KHz)");
 436         PrintAndLog("       H             High frequency (134 KHz)");
 437         PrintAndLog("       q <divisor>   Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
 438         PrintAndLog("       b <bps>       Sets resolution of bits per sample. Default (max): 8");
 439         PrintAndLog("       d <decim>     Sets decimation. A value of N saves only 1 in N samples. Default: 1");
 440         PrintAndLog("       a [0|1]       Averaging - if set, will average the stored sample value when decimating. Default: 1");
 441         PrintAndLog("       t <threshold> Sets trigger threshold. 0 means no threshold (range: 0-128)");
 442         PrintAndLog("Examples:");
 443         PrintAndLog("      lf config b 8 L");
 444         PrintAndLog("                    Samples at 125KHz, 8bps.");
 445         PrintAndLog("      lf config H b 4 d 3");
 446         PrintAndLog("                    Samples at 134KHz, averages three samples into one, stored with ");
 447         PrintAndLog("                    a resolution of 4 bits per sample.");
 448         PrintAndLog("      lf read");
 449         PrintAndLog("                    Performs a read (active field)");
 450         PrintAndLog("      lf snoop");
 451         PrintAndLog("                    Performs a snoop (no active field)");
 452         return 0;
 453 }
 454
 455 int CmdLFSetConfig(const char *Cmd)
 456 {
 457
 458         uint8_t divisor =  0;//Frequency divisor
 459         uint8_t bps = 0; // Bits per sample
 460         uint8_t decimation = 0; //How many to keep
 461         bool averaging = 1; // Defaults to true
 462         bool errors = FALSE;
 463         int trigger_threshold =-1;//Means no change
 464         uint8_t unsigned_trigg = 0;
 465
 466         uint8_t cmdp =0;
 467         while(param_getchar(Cmd, cmdp) != 0x00)
 468         {
 469                 switch(param_getchar(Cmd, cmdp))
 470                 {
 471                 case 'h':
 472                         return usage_lf_config();
 473                 case 'H':
 474                         divisor = 88;
 475                         cmdp++;
 476                         break;
 477                 case 'L':
 478                         divisor = 95;
 479                         cmdp++;
 480                         break;
 481                 case 'q':
 482                         errors |= param_getdec(Cmd,cmdp+1,&divisor);
 483                         cmdp+=2;
 484                         break;
 485                 case 't':
 486                         errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
 487                         cmdp+=2;
 488                         if(!errors) trigger_threshold = unsigned_trigg;
 489                         break;
 490                 case 'b':
 491                         errors |= param_getdec(Cmd,cmdp+1,&bps);
 492                         cmdp+=2;
 493                         break;
 494                 case 'd':
 495                         errors |= param_getdec(Cmd,cmdp+1,&decimation);
 496                         cmdp+=2;
 497                         break;
 498                 case 'a':
 499                         averaging = param_getchar(Cmd,cmdp+1) == '1';
 500                         cmdp+=2;
 501                         break;
 502                 default:
 503                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 504                         errors = 1;
 505                         break;
 506                 }
 507                 if(errors) break;
 508         }
 509         if(cmdp == 0)
 510         {
 511                 errors = 1;// No args
 512         }
 513
 514         //Validations
 515         if(errors)
 516         {
 517                 return usage_lf_config();
 518         }
 519         //Bps is limited to 8, so fits in lower half of arg1
 520         if(bps >> 8) bps = 8;
 521
 522         sample_config config = {
 523                 decimation,bps,averaging,divisor,trigger_threshold
 524         };
 525         //Averaging is a flag on high-bit of arg[1]
 526         UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
 527         memcpy(c.d.asBytes,&config,sizeof(sample_config));
 528         SendCommand(&c);
 529         return 0;
 530 }
 531
 532 int CmdLFRead(const char *Cmd)
 533 {
 534
 535         uint8_t cmdp = 0;
 536         bool arg1 = false;
 537         if (param_getchar(Cmd, cmdp) == 'h')
 538         {
 539                 return usage_lf_read();
 540         }
 541         if (param_getchar(Cmd, cmdp) == 's') arg1 = true; //suppress print
 542         //And ship it to device
 543         UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
 544         SendCommand(&c);
 545         //WaitForResponse(CMD_ACK,NULL);
 546         if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
 547                 PrintAndLog("command execution time out");
 548                 return 1;
 549         }
 550
 551         return 0;
 552 }
 553
 554 int CmdLFSnoop(const char *Cmd)
 555 {
 556         uint8_t cmdp =0;
 557         if(param_getchar(Cmd, cmdp) == 'h')
 558         {
 559                 return usage_lf_snoop();
 560         }
 561
 562         UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
 563         SendCommand(&c);
 564         WaitForResponse(CMD_ACK,NULL);
 565         return 0;
 566 }
 567
 568 static void ChkBitstream(const char *str)
 569 {
 570   int i;
 571
 572   /* convert to bitstream if necessary */
 573         for (i = 0; i < (int)(GraphTraceLen / 2); i++){
 574                 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
 575       CmdGetBitStream("");
 576       break;
 577     }
 578   }
 579 }
 580 //Attempt to simulate any wave in buffer (one bit per output sample)
 581 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
 582 int CmdLFSim(const char *Cmd)
 583 {
 584   int i,j;
 585   static int gap;
 586
 587   sscanf(Cmd, "%i", &gap);
 588
 589         // convert to bitstream if necessary
 590
 591   ChkBitstream(Cmd);
 592
 593         //can send only 512 bits at a time (1 byte sent per bit...)
 594   printf("Sending [%d bytes]", GraphTraceLen);
 595   for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
 596     UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
 597
 598     for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
 599       c.d.asBytes[j] = GraphBuffer[i+j];
 600     }
 601     SendCommand(&c);
 602     WaitForResponse(CMD_ACK,NULL);
 603     printf(".");
 604   }
 605
 606   printf("\n");
 607   PrintAndLog("Starting to simulate");
 608   UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
 609   SendCommand(&c);
 610   return 0;
 611 }
 612
 613 int usage_lf_simfsk(void)
 614 {
 615   //print help
 616   PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
 617   PrintAndLog("Options:        ");
 618   PrintAndLog("       h              This help");
 619   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 620   PrintAndLog("       i              invert data");
 621   PrintAndLog("       H <fcHigh>     Manually set the larger Field Clock");
 622   PrintAndLog("       L <fcLow>      Manually set the smaller Field Clock");
 623   //PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 624   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 625   PrintAndLog("\n  NOTE: if you set one clock manually set them all manually");
 626   return 0;
 627 }
 628
 629 int usage_lf_simask(void)
 630 {
 631   //print help
 632   PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
 633   PrintAndLog("Options:        ");
 634   PrintAndLog("       h              This help");
 635   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 636   PrintAndLog("       i              invert data");
 637   PrintAndLog("       b              sim ask/biphase");
 638   PrintAndLog("       m              sim ask/manchester - Default");
 639   PrintAndLog("       r              sim ask/raw");
 640   PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 641   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 642   return 0;
 643 }
 644
 645 int usage_lf_simpsk(void)
 646 {
 647   //print help
 648   PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
 649   PrintAndLog("Options:        ");
 650   PrintAndLog("       h              This help");
 651   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 652   PrintAndLog("       i              invert data");
 653   PrintAndLog("       1              set PSK1 (default)");
 654   PrintAndLog("       2              set PSK2");
 655   PrintAndLog("       3              set PSK3");
 656   PrintAndLog("       r <carrier>    2|4|8 are valid carriers: default = 2");
 657   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 658   return 0;
 659 }
 660
 661 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
 662 // - allow pull data from DemodBuffer
 663 int CmdLFfskSim(const char *Cmd)
 664 {
 665         //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
 666         // otherwise will need FChigh, FClow, Clock, and bitstream
 667   uint8_t fcHigh=0, fcLow=0, clk=0;
 668   uint8_t invert=0;
 669   bool errors = FALSE;
 670   char hexData[32] = {0x00}; // store entered hex data
 671   uint8_t data[255] = {0x00};
 672   int dataLen = 0;
 673   uint8_t cmdp = 0;
 674   while(param_getchar(Cmd, cmdp) != 0x00)
 675   {
 676     switch(param_getchar(Cmd, cmdp))
 677     {
 678     case 'h':
 679       return usage_lf_simfsk();
 680     case 'i':
 681       invert = 1;
 682       cmdp++;
 683       break;
 684     case 'c':
 685       errors |= param_getdec(Cmd,cmdp+1,&clk);
 686       cmdp+=2;
 687       break;
 688     case 'H':
 689       errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
 690       cmdp+=2;
 691       break;
 692     case 'L':
 693       errors |= param_getdec(Cmd,cmdp+1,&fcLow);
 694       cmdp+=2;
 695       break;
 696     //case 's':
 697     //  separator=1;
 698     //  cmdp++;
 699     //  break;
 700     case 'd':
 701       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 702       if (dataLen==0) {
 703         errors=TRUE;
 704       } else {
 705         dataLen = hextobinarray((char *)data, hexData);
 706       }
 707       if (dataLen==0) errors=TRUE;
 708       if (errors) PrintAndLog ("Error getting hex data");
 709       cmdp+=2;
 710       break;
 711     default:
 712       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 713       errors = TRUE;
 714       break;
 715     }
 716     if(errors) break;
 717   }
 718   if(cmdp == 0 && DemodBufferLen == 0)
 719   {
 720     errors = TRUE;// No args
 721   }
 722
 723   //Validations
 724   if(errors)
 725   {
 726     return usage_lf_simfsk();
 727   }
 728
 729   if (dataLen == 0){ //using DemodBuffer
 730     if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
 731       uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
 732       if (ans==0){
 733         if (!fcHigh) fcHigh=10;
 734         if (!fcLow) fcLow=8;
 735         if (!clk) clk=50;
 736       }
 737     }
 738   } else {
 739     setDemodBuf(data, dataLen, 0);
 740   }
 741
 742         //default if not found
 743   if (clk == 0) clk = 50;
 744   if (fcHigh == 0) fcHigh = 10;
 745   if (fcLow == 0) fcLow = 8;
 746
 747   uint16_t arg1, arg2;
 748   arg1 = fcHigh << 8 | fcLow;
 749   arg2 = invert << 8 | clk;
 750   size_t size = DemodBufferLen;
 751   if (size > USB_CMD_DATA_SIZE) {
 752     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 753     size = USB_CMD_DATA_SIZE;
 754   }
 755   UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 756
 757   memcpy(c.d.asBytes, DemodBuffer, size);
 758   SendCommand(&c);
 759   return 0;
 760 }
 761
 762 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
 763 // - allow pull data from DemodBuffer
 764 int CmdLFaskSim(const char *Cmd)
 765 {
 766   //autodetect clock from Graphbuffer if using demod buffer
 767         // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
 768   uint8_t encoding = 1, separator = 0;
 769   uint8_t clk=0, invert=0;
 770   bool errors = FALSE;
 771   char hexData[32] = {0x00};
 772   uint8_t data[255]= {0x00}; // store entered hex data
 773   int dataLen = 0;
 774   uint8_t cmdp = 0;
 775   while(param_getchar(Cmd, cmdp) != 0x00)
 776   {
 777     switch(param_getchar(Cmd, cmdp))
 778     {
 779     case 'h':
 780       return usage_lf_simask();
 781     case 'i':
 782       invert = 1;
 783       cmdp++;
 784       break;
 785     case 'c':
 786       errors |= param_getdec(Cmd,cmdp+1,&clk);
 787       cmdp+=2;
 788       break;
 789     case 'b':
 790       encoding=2; //biphase
 791       cmdp++;
 792       break;
 793     case 'm':
 794       encoding=1;
 795       cmdp++;
 796       break;
 797     case 'r':
 798       encoding=0;
 799       cmdp++;
 800       break;
 801     case 's':
 802       separator=1;
 803       cmdp++;
 804       break;
 805     case 'd':
 806       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 807       if (dataLen==0) {
 808         errors=TRUE;
 809       } else {
 810         dataLen = hextobinarray((char *)data, hexData);
 811       }
 812       if (dataLen==0) errors=TRUE;
 813       if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
 814         cmdp+=2;
 815       break;
 816     default:
 817       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 818       errors = TRUE;
 819       break;
 820     }
 821     if(errors) break;
 822   }
 823   if(cmdp == 0 && DemodBufferLen == 0)
 824   {
 825     errors = TRUE;// No args
 826   }
 827
 828   //Validations
 829   if(errors)
 830   {
 831     return usage_lf_simask();
 832   }
 833   if (dataLen == 0){ //using DemodBuffer
 834     if (clk == 0) clk = GetAskClock("0", false, false);
 835   } else {
 836     setDemodBuf(data, dataLen, 0);
 837   }
 838   if (clk == 0) clk = 64;
 839   if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
 840   uint16_t arg1, arg2;
 841   size_t size=DemodBufferLen;
 842   arg1 = clk << 8 | encoding;
 843   arg2 = invert << 8 | separator;
 844   if (size > USB_CMD_DATA_SIZE) {
 845     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 846     size = USB_CMD_DATA_SIZE;
 847   }
 848   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 849   PrintAndLog("preparing to sim ask data: %d bits", size);
 850   memcpy(c.d.asBytes, DemodBuffer, size);
 851   SendCommand(&c);
 852   return 0;
 853 }
 854
 855 // by marshmellow - sim psk data given carrier, clock, invert
 856 // - allow pull data from DemodBuffer or parameters
 857 int CmdLFpskSim(const char *Cmd)
 858 {
 859   //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
 860   //will need carrier, Clock, and bitstream
 861   uint8_t carrier=0, clk=0;
 862   uint8_t invert=0;
 863   bool errors = FALSE;
 864   char hexData[32] = {0x00}; // store entered hex data
 865   uint8_t data[255] = {0x00};
 866   int dataLen = 0;
 867   uint8_t cmdp = 0;
 868   uint8_t pskType = 1;
 869   while(param_getchar(Cmd, cmdp) != 0x00)
 870   {
 871     switch(param_getchar(Cmd, cmdp))
 872     {
 873     case 'h':
 874       return usage_lf_simpsk();
 875     case 'i':
 876       invert = 1;
 877       cmdp++;
 878       break;
 879     case 'c':
 880       errors |= param_getdec(Cmd,cmdp+1,&clk);
 881       cmdp+=2;
 882       break;
 883     case 'r':
 884       errors |= param_getdec(Cmd,cmdp+1,&carrier);
 885       cmdp+=2;
 886       break;
 887     case '1':
 888       pskType=1;
 889       cmdp++;
 890       break;
 891     case '2':
 892       pskType=2;
 893       cmdp++;
 894       break;
 895     case '3':
 896       pskType=3;
 897       cmdp++;
 898       break;
 899     case 'd':
 900       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 901       if (dataLen==0) {
 902         errors=TRUE;
 903       } else {
 904         dataLen = hextobinarray((char *)data, hexData);
 905       }
 906       if (dataLen==0) errors=TRUE;
 907       if (errors) PrintAndLog ("Error getting hex data");
 908       cmdp+=2;
 909       break;
 910     default:
 911       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 912       errors = TRUE;
 913       break;
 914     }
 915     if (errors) break;
 916   }
 917   if (cmdp == 0 && DemodBufferLen == 0)
 918   {
 919     errors = TRUE;// No args
 920   }
 921
 922   //Validations
 923   if (errors)
 924   {
 925     return usage_lf_simpsk();
 926   }
 927   if (dataLen == 0){ //using DemodBuffer
 928     PrintAndLog("Getting Clocks");
 929     if (clk==0) clk = GetPskClock("", FALSE, FALSE);
 930     PrintAndLog("clk: %d",clk);
 931     if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
 932     PrintAndLog("carrier: %d", carrier);
 933   } else {
 934     setDemodBuf(data, dataLen, 0);
 935   }
 936
 937   if (clk <= 0) clk = 32;
 938   if (carrier == 0) carrier = 2;
 939   if (pskType != 1){
 940     if (pskType == 2){
 941       //need to convert psk2 to psk1 data before sim
 942       psk2TOpsk1(DemodBuffer, DemodBufferLen);
 943     } else {
 944       PrintAndLog("Sorry, PSK3 not yet available");
 945     }
 946   }
 947   uint16_t arg1, arg2;
 948   arg1 = clk << 8 | carrier;
 949   arg2 = invert;
 950   size_t size=DemodBufferLen;
 951   if (size > USB_CMD_DATA_SIZE) {
 952     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 953     size=USB_CMD_DATA_SIZE;
 954   }
 955   UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
 956   PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
 957   memcpy(c.d.asBytes, DemodBuffer, size);
 958   SendCommand(&c);
 959
 960   return 0;
 961 }
 962
 963 int CmdLFSimBidir(const char *Cmd)
 964 {
 965   // Set ADC to twice the carrier for a slight supersampling
 966   // HACK: not implemented in ARMSRC.
 967   PrintAndLog("Not implemented yet.");
 968   UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
 969   SendCommand(&c);
 970   return 0;
 971 }
 972
 973 int CmdVchDemod(const char *Cmd)
 974 {
 975   // Is this the entire sync pattern, or does this also include some
 976   // data bits that happen to be the same everywhere? That would be
 977   // lovely to know.
 978   static const int SyncPattern[] = {
 979     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 980     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 981     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 982     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 983     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 984     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 985     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 986     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 987     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 988     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 989   };
 990
 991   // So first, we correlate for the sync pattern, and mark that.
 992   int bestCorrel = 0, bestPos = 0;
 993   int i;
 994   // It does us no good to find the sync pattern, with fewer than
 995   // 2048 samples after it...
 996   for (i = 0; i < (GraphTraceLen-2048); i++) {
 997     int sum = 0;
 998     int j;
 999     for (j = 0; j < arraylen(SyncPattern); j++) {
1000       sum += GraphBuffer[i+j]*SyncPattern[j];
1001     }
1002     if (sum > bestCorrel) {
1003       bestCorrel = sum;
1004       bestPos = i;
1005     }
1006   }
1007   PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
1008
1009   char bits[257];
1010   bits[256] = '\0';
1011
1012   int worst = INT_MAX;
1013   int worstPos = 0;
1014
1015   for (i = 0; i < 2048; i += 8) {
1016     int sum = 0;
1017     int j;
1018     for (j = 0; j < 8; j++) {
1019       sum += GraphBuffer[bestPos+i+j];
1020     }
1021     if (sum < 0) {
1022       bits[i/8] = '.';
1023     } else {
1024       bits[i/8] = '1';
1025     }
1026     if(abs(sum) < worst) {
1027       worst = abs(sum);
1028       worstPos = i;
1029     }
1030   }
1031   PrintAndLog("bits:");
1032   PrintAndLog("%s", bits);
1033   PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
1034
1035   if (strcmp(Cmd, "clone")==0) {
1036     GraphTraceLen = 0;
1037     char *s;
1038     for(s = bits; *s; s++) {
1039       int j;
1040       for(j = 0; j < 16; j++) {
1041         GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1042       }
1043     }
1044     RepaintGraphWindow();
1045   }
1046   return 0;
1047 }
1048
1049 //by marshmellow
1050 int CmdLFfind(const char *Cmd)
1051 {
1052   int ans=0;
1053   char cmdp = param_getchar(Cmd, 0);
1054   char testRaw = param_getchar(Cmd, 1);
1055   if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
1056     PrintAndLog("Usage:  lf search <0|1> [u]");
1057     PrintAndLog("     <use data from Graphbuffer> , if not set, try reading data from tag.");
1058     PrintAndLog("     [Search for Unknown tags] , if not set, reads only known tags.");
1059     PrintAndLog("");
1060     PrintAndLog("    sample: lf search     = try reading data from tag & search for known tags");
1061     PrintAndLog("          : lf search 1   = use data from GraphBuffer & search for known tags");
1062     PrintAndLog("          : lf search u   = try reading data from tag & search for known and unknown tags");
1063     PrintAndLog("          : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1064
1065     return 0;
1066   }
1067
1068   if (!offline && (cmdp != '1')){
1069                 CmdLFRead("s");
1070                 getSamples("30000",false);
1071   } else if (GraphTraceLen < 1000) {
1072     PrintAndLog("Data in Graphbuffer was too small.");
1073     return 0;
1074   }
1075   if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1076
1077   PrintAndLog("NOTE: some demods output possible binary\n  if it finds something that looks like a tag");
1078   PrintAndLog("False Positives ARE possible\n");
1079   PrintAndLog("\nChecking for known tags:\n");
1080
1081   ans=CmdFSKdemodIO("");
1082   if (ans>0) {
1083     PrintAndLog("\nValid IO Prox ID Found!");
1084     return 1;
1085   }
1086
1087   ans=CmdFSKdemodPyramid("");
1088   if (ans>0) {
1089     PrintAndLog("\nValid Pyramid ID Found!");
1090     return 1;
1091   }
1092
1093   ans=CmdFSKdemodParadox("");
1094   if (ans>0) {
1095     PrintAndLog("\nValid Paradox ID Found!");
1096     return 1;
1097   }
1098
1099   ans=CmdFSKdemodAWID("");
1100   if (ans>0) {
1101     PrintAndLog("\nValid AWID ID Found!");
1102     return 1;
1103   }
1104
1105   ans=CmdFSKdemodHID("");
1106   if (ans>0) {
1107     PrintAndLog("\nValid HID Prox ID Found!");
1108     return 1;
1109   }
1110
1111   //add psk and indala
1112   ans=CmdIndalaDecode("");
1113   if (ans>0) {
1114     PrintAndLog("\nValid Indala ID Found!");
1115     return 1;
1116   }
1117
1118   ans=CmdAskEM410xDemod("");
1119   if (ans>0) {
1120     PrintAndLog("\nValid EM410x ID Found!");
1121     return 1;
1122   }
1123
1124   ans=CmdG_Prox_II_Demod("");
1125   if (ans>0) {
1126     PrintAndLog("\nValid Guardall G-Prox II ID Found!");
1127     return 1;
1128   }
1129
1130         ans=CmdFDXBdemodBI("");
1131         if (ans>0) {
1132                 PrintAndLog("\nValid FDX-B ID Found!");
1133                 return 1;
1134         }
1135
1136         ans=EM4x50Read("", false);
1137         if (ans>0) {
1138                 PrintAndLog("\nValid EM4x50 ID Found!");
1139                 return 1;
1140         }
1141
1142         ans=CmdPSKNexWatch("");
1143         if (ans>0) {
1144                 PrintAndLog("\nValid NexWatch ID Found!");
1145                 return 1;
1146         }
1147
1148   PrintAndLog("\nNo Known Tags Found!\n");
1149   if (testRaw=='u' || testRaw=='U'){
1150     //test unknown tag formats (raw mode)
1151     PrintAndLog("\nChecking for Unknown tags:\n");
1152     ans=AutoCorrelate(4000, FALSE, FALSE);
1153
1154     if (ans > 0) {
1155
1156                 PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1157
1158                 if ( ans % 8 == 0)  {
1159                         int bytes = (ans / 8);
1160                         PrintAndLog("Possible %d bytes", bytes);
1161                         int blocks = 0;
1162                         if ( bytes % 2 == 0) {
1163                                 blocks = (bytes / 2);
1164                                 PrintAndLog("Possible  2 blocks, width %d", blocks);
1165                         }
1166                         if ( bytes % 4 == 0) {
1167                                 blocks = (bytes / 4);
1168                                 PrintAndLog("Possible  4 blocks, width %d", blocks);
1169                         }
1170                         if ( bytes % 8 == 0) {
1171                                 blocks = (bytes / 8);
1172                                 PrintAndLog("Possible  8 blocks, width %d", blocks);
1173                         }
1174                         if ( bytes % 16 == 0) {
1175                                 blocks = (bytes / 16);
1176                                 PrintAndLog("Possible 16 blocks, width %d", blocks);
1177                         }
1178                 }
1179         }
1180                 ans=GetFskClock("",FALSE,FALSE);
1181     if (ans != 0){ //fsk
1182                         ans=FSKrawDemod("",TRUE);
1183       if (ans>0) {
1184         PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1185         return 1;
1186       }
1187     }
1188                 ans=ASKDemod("0 0 0",TRUE,FALSE,1);
1189     if (ans>0) {
1190       PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1191       PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1192       return 1;
1193     }
1194     ans=CmdPSK1rawDemod("");
1195     if (ans>0) {
1196       PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1197       PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1198       PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1199       return 1;
1200     }
1201     PrintAndLog("\nNo Data Found!\n");
1202   }
1203   return 0;
1204 }
1205
1206 static command_t CommandTable[] =
1207 {
1208   {"help",        CmdHelp,            1, "This help"},
1209   {"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
1210   {"awid",              CmdLFAWID,                  1, "{ AWID RFIDs... }"},
1211   {"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},
1212   {"hitag",       CmdLFHitag,         1, "{ HITAG RFIDs... }"},
1213   {"io",          CmdLFIO,                1, "{ IOPROX RFIDs... }"},
1214   {"pcf7931",     CmdLFPCF7931,       1, "{ PCF7931 RFIDs... }"},
1215   {"ti",          CmdLFTI,            1, "{ TI RFIDs... }"},
1216   {"t55xx",       CmdLFT55XX,         1, "{ T55X7 RFIDs... }"},
1217   {"viking",      CmdLFViking,        1, "{ Viking RFIDs... }"},
1218   {"config",      CmdLFSetConfig,     0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1219
1220   {"cmdread",     CmdLFCommandRead,   0, "<off period> <'0' period> <'1' period> <command> ['h' 134] \n\t\t-- Modulate LF reader field to send command before read (all periods in microseconds)"},
1221   {"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
1222   {"indalademod", CmdIndalaDemod,     1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1223   {"indalaclone", CmdIndalaClone,     0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1224   {"read",        CmdLFRead,          0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1225   {"search",      CmdLFfind,          1, "[offline] ['u'] Read and Search for valid known tag (in offline mode it you can load first then search) \n\t\t-- 'u' to search for unknown tags"},
1226   {"sim",         CmdLFSim,           0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1227   {"simask",      CmdLFaskSim,        0, "[clock] [invert <1|0>] [biphase/manchester/raw <'b'|'m'|'r'>] [msg separator 's'] [d <hexdata>] \n\t\t-- Simulate LF ASK tag from demodbuffer or input"},
1228   {"simfsk",      CmdLFfskSim,        0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] \n\t\t-- Simulate LF FSK tag from demodbuffer or input"},
1229   {"simpsk",      CmdLFpskSim,        0, "[1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>] \n\t\t-- Simulate LF PSK tag from demodbuffer or input"},
1230   {"simbidir",    CmdLFSimBidir,      0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1231   {"snoop",       CmdLFSnoop,         0, "['l'|'h'|<divisor>] [trigger threshold] -- Snoop LF (l:125khz, h:134khz)"},
1232   {"vchdemod",    CmdVchDemod,        1, "['clone'] -- Demodulate samples for VeriChip"},
1233   {NULL, NULL, 0, NULL}
1234 };
1235
1236 int CmdLF(const char *Cmd)
1237 {
1238   CmdsParse(CommandTable, Cmd);
1239   return 0;
1240 }
1241
1242 int CmdHelp(const char *Cmd)
1243 {
1244   CmdsHelp(CommandTable);
1245   return 0;
1246 }