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 int usage_lf_cmdread(void) {
  37         PrintAndLog("Usage: lf cmdread d <delay period> z <zero period> o <one period> c <cmdbytes> [H]");
  38         PrintAndLog("Options:        ");
  39         PrintAndLog("       h             This help");
  40         PrintAndLog("       H             Freqency High (134 KHz), default is 'Low (125KHz)'");
  41         PrintAndLog("       d <delay>     delay OFF period, (dec)");
  42         PrintAndLog("       z <zero>      time period ZERO, (dec)");
  43         PrintAndLog("       o <one>       time period ONE, (dec)");
  44         PrintAndLog("       c <cmd>       Command bytes");
  45         PrintAndLog("       ************* All periods in microseconds (ms)");
  46         PrintAndLog("Examples:");
  47         PrintAndLog("      lf cmdread d 80 z 100 o 200 c 11000");
  48         PrintAndLog("      lf cmdread d 80 z 100 o 100 c 11000 H");
  49         return 0;
  50 }
  51 int usage_lf_read(void){
  52         PrintAndLog("Usage: lf read [h] [s]");
  53         PrintAndLog("Options:        ");
  54         PrintAndLog("       h            This help");
  55         PrintAndLog("       s            silent run no printout");
  56         PrintAndLog("This function takes no arguments. ");
  57         PrintAndLog("Use 'lf config' to set parameters.");
  58         return 0;
  59 }
  60 int usage_lf_snoop(void) {
  61         PrintAndLog("Usage: lf snoop");
  62         PrintAndLog("Options:        ");
  63         PrintAndLog("       h            This help");
  64         PrintAndLog("This function takes no arguments. ");
  65         PrintAndLog("Use 'lf config' to set parameters.");
  66         return 0;
  67 }
  68 int usage_lf_config(void) {
  69         PrintAndLog("Usage: lf config [H|<divisor>] [b <bps>] [d <decim>] [a 0|1]");
  70         PrintAndLog("Options:        ");
  71         PrintAndLog("       h             This help");
  72         PrintAndLog("       L             Low frequency (125 KHz)");
  73         PrintAndLog("       H             High frequency (134 KHz)");
  74         PrintAndLog("       q <divisor>   Manually set divisor. 88-> 134KHz, 95-> 125 Hz");
  75         PrintAndLog("       b <bps>       Sets resolution of bits per sample. Default (max): 8");
  76         PrintAndLog("       d <decim>     Sets decimation. A value of N saves only 1 in N samples. Default: 1");
  77         PrintAndLog("       a [0|1]       Averaging - if set, will average the stored sample value when decimating. Default: 1");
  78         PrintAndLog("       t <threshold> Sets trigger threshold. 0 means no threshold (range: 0-128)");
  79         PrintAndLog("Examples:");
  80         PrintAndLog("      lf config b 8 L");
  81         PrintAndLog("                    Samples at 125KHz, 8bps.");
  82         PrintAndLog("      lf config H b 4 d 3");
  83         PrintAndLog("                    Samples at 134KHz, averages three samples into one, stored with ");
  84         PrintAndLog("                    a resolution of 4 bits per sample.");
  85         PrintAndLog("      lf read");
  86         PrintAndLog("                    Performs a read (active field)");
  87         PrintAndLog("      lf snoop");
  88         PrintAndLog("                    Performs a snoop (no active field)");
  89         return 0;
  90 }
  91 int usage_lf_simfsk(void) {
  92   PrintAndLog("Usage: lf simfsk [c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>]");
  93   PrintAndLog("Options:        ");
  94   PrintAndLog("       h              This help");
  95   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
  96   PrintAndLog("       i              invert data");
  97   PrintAndLog("       H <fcHigh>     Manually set the larger Field Clock");
  98   PrintAndLog("       L <fcLow>      Manually set the smaller Field Clock");
  99   //PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 100   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 101   PrintAndLog("\n  NOTE: if you set one clock manually set them all manually");
 102   return 0;
 103 }
 104 int usage_lf_simask(void) {
 105   PrintAndLog("Usage: lf simask [c <clock>] [i] [b|m|r] [s] [d <raw hex to sim>]");
 106   PrintAndLog("Options:        ");
 107   PrintAndLog("       h              This help");
 108   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 109   PrintAndLog("       i              invert data");
 110   PrintAndLog("       b              sim ask/biphase");
 111   PrintAndLog("       m              sim ask/manchester - Default");
 112   PrintAndLog("       r              sim ask/raw");
 113   PrintAndLog("       s              TBD- -to enable a gap between playback repetitions - default: no gap");
 114   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 115   return 0;
 116 }
 117 int usage_lf_simpsk(void) {
 118   PrintAndLog("Usage: lf simpsk [1|2|3] [c <clock>] [i] [r <carrier>] [d <raw hex to sim>]");
 119   PrintAndLog("Options:        ");
 120   PrintAndLog("       h              This help");
 121   PrintAndLog("       c <clock>      Manually set clock - can autodetect if using DemodBuffer");
 122   PrintAndLog("       i              invert data");
 123   PrintAndLog("       1              set PSK1 (default)");
 124   PrintAndLog("       2              set PSK2");
 125   PrintAndLog("       3              set PSK3");
 126   PrintAndLog("       r <carrier>    2|4|8 are valid carriers: default = 2");
 127   PrintAndLog("       d <hexdata>    Data to sim as hex - omit to sim from DemodBuffer");
 128   return 0;
 129 }
 130
 131 /* send a LF command before reading */
 132 int CmdLFCommandRead(const char *Cmd)
 133 {
 134         static char dummy[3] = {0x20,0x00,0x00};
 135         UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
 136         bool errors = FALSE;
 137
 138         uint8_t cmdp = 0;
 139         int strLength = 0;
 140
 141         while(param_getchar(Cmd, cmdp) != 0x00) {
 142                 switch(param_getchar(Cmd, cmdp))
 143                 {
 144                 case 'h':
 145                         return usage_lf_cmdread();
 146                 case 'H':
 147                         dummy[1]='h';
 148                         cmdp++;
 149                         break;
 150                 case 'L':
 151                         cmdp++;
 152                         break;
 153                 case 'c':
 154                         strLength = param_getstr(Cmd, cmdp+1, (char *)&c.d.asBytes);
 155                         cmdp+=2;
 156                         break;
 157                 case 'd':
 158                         c.arg[0] = param_get32ex(Cmd, cmdp+1, 0, 10);
 159                         cmdp+=2;
 160                         break;
 161                 case 'z':
 162                         c.arg[1] = param_get32ex(Cmd, cmdp+1, 0, 10);
 163                         cmdp+=2;
 164                         break;
 165                 case 'o':
 166                         c.arg[2] = param_get32ex(Cmd, cmdp+1, 0, 10);
 167                         cmdp+=2;
 168                         break;
 169                 default:
 170                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 171                         errors = 1;
 172                         break;
 173                 }
 174                 if(errors) break;
 175         }
 176         // No args
 177         if (cmdp == 0) errors = 1;
 178
 179         //Validations
 180         if (errors) return usage_lf_cmdread();
 181
 182         // in case they specified 'H'
 183         // added to the end..
 184         strcpy((char *)&c.d.asBytes + strLength, dummy);
 185
 186         clearCommandBuffer();
 187         SendCommand(&c);
 188         return 0;
 189 }
 190
 191 int CmdFlexdemod(const char *Cmd)
 192 {
 193   int i;
 194   for (i = 0; i < GraphTraceLen; ++i) {
 195     if (GraphBuffer[i] < 0) {
 196       GraphBuffer[i] = -1;
 197     } else {
 198       GraphBuffer[i] = 1;
 199     }
 200   }
 201
 202 #define LONG_WAIT 100
 203   int start;
 204   for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
 205     int first = GraphBuffer[start];
 206     for (i = start; i < start + LONG_WAIT; i++) {
 207       if (GraphBuffer[i] != first) {
 208         break;
 209       }
 210     }
 211     if (i == (start + LONG_WAIT)) {
 212       break;
 213     }
 214   }
 215   if (start == GraphTraceLen - LONG_WAIT) {
 216     PrintAndLog("nothing to wait for");
 217     return 0;
 218   }
 219
 220   GraphBuffer[start] = 2;
 221   GraphBuffer[start+1] = -2;
 222         uint8_t bits[64] = {0x00};
 223
 224         int bit, sum;
 225   i = start;
 226   for (bit = 0; bit < 64; bit++) {
 227                 sum = 0;
 228                 for (int j = 0; j < 16; j++) {
 229       sum += GraphBuffer[i++];
 230     }
 231
 232                 bits[bit] = (sum > 0) ? 1 : 0;
 233
 234     PrintAndLog("bit %d sum %d", bit, sum);
 235   }
 236
 237   for (bit = 0; bit < 64; bit++) {
 238     int j;
 239     int sum = 0;
 240     for (j = 0; j < 16; j++) {
 241       sum += GraphBuffer[i++];
 242     }
 243     if (sum > 0 && bits[bit] != 1) {
 244       PrintAndLog("oops1 at %d", bit);
 245     }
 246     if (sum < 0 && bits[bit] != 0) {
 247       PrintAndLog("oops2 at %d", bit);
 248     }
 249   }
 250
 251         // HACK writing back to graphbuffer.
 252   GraphTraceLen = 32*64;
 253   i = 0;
 254   int phase = 0;
 255   for (bit = 0; bit < 64; bit++) {
 256
 257                 phase = (bits[bit] == 0) ? 0 : 1;
 258
 259     int j;
 260     for (j = 0; j < 32; j++) {
 261       GraphBuffer[i++] = phase;
 262       phase = !phase;
 263     }
 264   }
 265
 266   RepaintGraphWindow();
 267   return 0;
 268 }
 269
 270 int CmdIndalaDemod(const char *Cmd)
 271 {
 272   // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
 273
 274   int state = -1;
 275   int count = 0;
 276   int i, j;
 277
 278   // worst case with GraphTraceLen=64000 is < 4096
 279   // under normal conditions it's < 2048
 280
 281   uint8_t rawbits[4096];
 282   int rawbit = 0;
 283   int worst = 0, worstPos = 0;
 284  // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
 285   for (i = 0; i < GraphTraceLen-1; i += 2) {
 286     count += 1;
 287     if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
 288       if (state == 0) {
 289         for (j = 0; j <  count - 8; j += 16) {
 290           rawbits[rawbit++] = 0;
 291         }
 292         if ((abs(count - j)) > worst) {
 293           worst = abs(count - j);
 294           worstPos = i;
 295         }
 296       }
 297       state = 1;
 298       count = 0;
 299     } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
 300       if (state == 1) {
 301         for (j = 0; j <  count - 8; j += 16) {
 302           rawbits[rawbit++] = 1;
 303         }
 304         if ((abs(count - j)) > worst) {
 305           worst = abs(count - j);
 306           worstPos = i;
 307         }
 308       }
 309       state = 0;
 310       count = 0;
 311     }
 312   }
 313
 314   if (rawbit>0){
 315     PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
 316     PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
 317         } else {
 318                 return 0;
 319         }
 320
 321   // Finding the start of a UID
 322   int uidlen, long_wait;
 323   if (strcmp(Cmd, "224") == 0) {
 324     uidlen = 224;
 325     long_wait = 30;
 326   } else {
 327     uidlen = 64;
 328     long_wait = 29;
 329   }
 330
 331   int start;
 332   int first = 0;
 333   for (start = 0; start <= rawbit - uidlen; start++) {
 334     first = rawbits[start];
 335     for (i = start; i < start + long_wait; i++) {
 336       if (rawbits[i] != first) {
 337         break;
 338       }
 339     }
 340     if (i == (start + long_wait)) {
 341       break;
 342     }
 343   }
 344
 345   if (start == rawbit - uidlen + 1) {
 346     PrintAndLog("nothing to wait for");
 347     return 0;
 348   }
 349
 350   // Inverting signal if needed
 351   if (first == 1) {
 352     for (i = start; i < rawbit; i++) {
 353       rawbits[i] = !rawbits[i];
 354     }
 355   }
 356
 357   // Dumping UID
 358         uint8_t bits[224] = {0x00};
 359         char showbits[225] = {0x00};
 360   int bit;
 361   i = start;
 362   int times = 0;
 363
 364   if (uidlen > rawbit) {
 365     PrintAndLog("Warning: not enough raw bits to get a full UID");
 366     for (bit = 0; bit < rawbit; bit++) {
 367       bits[bit] = rawbits[i++];
 368       // As we cannot know the parity, let's use "." and "/"
 369       showbits[bit] = '.' + bits[bit];
 370     }
 371     showbits[bit+1]='\0';
 372     PrintAndLog("Partial UID=%s", showbits);
 373     return 0;
 374   } else {
 375     for (bit = 0; bit < uidlen; bit++) {
 376       bits[bit] = rawbits[i++];
 377       showbits[bit] = '0' + bits[bit];
 378     }
 379     times = 1;
 380   }
 381
 382   //convert UID to HEX
 383   uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 384   int idx;
 385         uid1 = uid2 = 0;
 386
 387   if (uidlen==64){
 388     for( idx=0; idx<64; idx++) {
 389         if (showbits[idx] == '0') {
 390         uid1=(uid1<<1)|(uid2>>31);
 391         uid2=(uid2<<1)|0;
 392         } else {
 393         uid1=(uid1<<1)|(uid2>>31);
 394         uid2=(uid2<<1)|1;
 395         }
 396       }
 397     PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
 398   }
 399   else {
 400                 uid3 = uid4 = uid5 = uid6 = uid7 = 0;
 401
 402     for( idx=0; idx<224; idx++) {
 403         uid1=(uid1<<1)|(uid2>>31);
 404         uid2=(uid2<<1)|(uid3>>31);
 405         uid3=(uid3<<1)|(uid4>>31);
 406         uid4=(uid4<<1)|(uid5>>31);
 407         uid5=(uid5<<1)|(uid6>>31);
 408         uid6=(uid6<<1)|(uid7>>31);
 409
 410                         if (showbits[idx] == '0')
 411                                 uid7 = (uid7<<1) | 0;
 412                         else
 413                                 uid7 = (uid7<<1) | 1;
 414       }
 415     PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 416   }
 417
 418   // Checking UID against next occurrences
 419     int failed = 0;
 420         for (; i + uidlen <= rawbit;) {
 421                 failed = 0;
 422     for (bit = 0; bit < uidlen; bit++) {
 423       if (bits[bit] != rawbits[i++]) {
 424         failed = 1;
 425         break;
 426       }
 427     }
 428     if (failed == 1) {
 429       break;
 430     }
 431     times += 1;
 432   }
 433
 434   PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
 435
 436   // Remodulating for tag cloning
 437         // HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
 438         // since this changes graphbuffer data.
 439   GraphTraceLen = 32*uidlen;
 440   i = 0;
 441   int phase = 0;
 442   for (bit = 0; bit < uidlen; bit++) {
 443     if (bits[bit] == 0) {
 444       phase = 0;
 445     } else {
 446       phase = 1;
 447     }
 448     int j;
 449     for (j = 0; j < 32; j++) {
 450       GraphBuffer[i++] = phase;
 451       phase = !phase;
 452     }
 453   }
 454
 455   RepaintGraphWindow();
 456   return 1;
 457 }
 458
 459 int CmdIndalaClone(const char *Cmd)
 460 {
 461   UsbCommand c;
 462         unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
 463
 464         uid1 =  uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
 465   int n = 0, i = 0;
 466
 467   if (strchr(Cmd,'l') != 0) {
 468     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 469       uid1 = (uid1 << 4) | (uid2 >> 28);
 470       uid2 = (uid2 << 4) | (uid3 >> 28);
 471       uid3 = (uid3 << 4) | (uid4 >> 28);
 472       uid4 = (uid4 << 4) | (uid5 >> 28);
 473       uid5 = (uid5 << 4) | (uid6 >> 28);
 474       uid6 = (uid6 << 4) | (uid7 >> 28);
 475         uid7 = (uid7 << 4) | (n & 0xf);
 476     }
 477     PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
 478     c.cmd = CMD_INDALA_CLONE_TAG_L;
 479     c.d.asDwords[0] = uid1;
 480     c.d.asDwords[1] = uid2;
 481     c.d.asDwords[2] = uid3;
 482     c.d.asDwords[3] = uid4;
 483     c.d.asDwords[4] = uid5;
 484     c.d.asDwords[5] = uid6;
 485     c.d.asDwords[6] = uid7;
 486         } else {
 487     while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
 488       uid1 = (uid1 << 4) | (uid2 >> 28);
 489       uid2 = (uid2 << 4) | (n & 0xf);
 490     }
 491     PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
 492     c.cmd = CMD_INDALA_CLONE_TAG;
 493     c.arg[0] = uid1;
 494     c.arg[1] = uid2;
 495   }
 496
 497   SendCommand(&c);
 498   return 0;
 499 }
 500
 501 int CmdLFSetConfig(const char *Cmd)
 502 {
 503
 504         uint8_t divisor =  0;//Frequency divisor
 505         uint8_t bps = 0; // Bits per sample
 506         uint8_t decimation = 0; //How many to keep
 507         bool averaging = 1; // Defaults to true
 508         bool errors = FALSE;
 509         int trigger_threshold =-1;//Means no change
 510         uint8_t unsigned_trigg = 0;
 511
 512         uint8_t cmdp =0;
 513         while(param_getchar(Cmd, cmdp) != 0x00)
 514         {
 515                 switch(param_getchar(Cmd, cmdp))
 516                 {
 517                 case 'h':
 518                         return usage_lf_config();
 519                 case 'H':
 520                         divisor = 88;
 521                         cmdp++;
 522                         break;
 523                 case 'L':
 524                         divisor = 95;
 525                         cmdp++;
 526                         break;
 527                 case 'q':
 528                         errors |= param_getdec(Cmd,cmdp+1,&divisor);
 529                         cmdp+=2;
 530                         break;
 531                 case 't':
 532                         errors |= param_getdec(Cmd,cmdp+1,&unsigned_trigg);
 533                         cmdp+=2;
 534                         if(!errors) trigger_threshold = unsigned_trigg;
 535                         break;
 536                 case 'b':
 537                         errors |= param_getdec(Cmd,cmdp+1,&bps);
 538                         cmdp+=2;
 539                         break;
 540                 case 'd':
 541                         errors |= param_getdec(Cmd,cmdp+1,&decimation);
 542                         cmdp+=2;
 543                         break;
 544                 case 'a':
 545                         averaging = param_getchar(Cmd,cmdp+1) == '1';
 546                         cmdp+=2;
 547                         break;
 548                 default:
 549                         PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 550                         errors = 1;
 551                         break;
 552                 }
 553                 if(errors) break;
 554         }
 555         if(cmdp == 0)
 556         {
 557                 errors = 1;// No args
 558         }
 559
 560         //Validations
 561         if(errors)
 562         {
 563                 return usage_lf_config();
 564         }
 565         //Bps is limited to 8, so fits in lower half of arg1
 566         if(bps >> 8) bps = 8;
 567
 568         sample_config config = {
 569                 decimation,bps,averaging,divisor,trigger_threshold
 570         };
 571         //Averaging is a flag on high-bit of arg[1]
 572         UsbCommand c = {CMD_SET_LF_SAMPLING_CONFIG};
 573         memcpy(c.d.asBytes,&config,sizeof(sample_config));
 574         SendCommand(&c);
 575         return 0;
 576 }
 577
 578 int CmdLFRead(const char *Cmd)
 579 {
 580         bool arg1 = false;
 581         uint8_t cmdp =  param_getchar(Cmd, 0);
 582
 583         if ( cmdp == 'h' || cmdp == 'H') return usage_lf_read();
 584
 585          //suppress print
 586         if ( cmdp == 's' || cmdp == 'S') arg1 = true;
 587
 588         UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K, {arg1,0,0}};
 589         clearCommandBuffer();
 590         SendCommand(&c);
 591         if ( !WaitForResponseTimeout(CMD_ACK,NULL,2500) ) {
 592                 PrintAndLog("command execution time out");
 593                 return 1;
 594         }
 595         return 0;
 596 }
 597
 598 int CmdLFSnoop(const char *Cmd)
 599 {
 600         uint8_t cmdp = param_getchar(Cmd, 0);
 601         if(cmdp == 'h' || cmdp == 'H') return usage_lf_snoop();
 602
 603         UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
 604         clearCommandBuffer();
 605         SendCommand(&c);
 606         WaitForResponse(CMD_ACK,NULL);
 607         return 0;
 608 }
 609
 610 static void ChkBitstream(const char *str)
 611 {
 612   int i;
 613
 614   /* convert to bitstream if necessary */
 615         for (i = 0; i < (int)(GraphTraceLen / 2); i++){
 616                 if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
 617       CmdGetBitStream("");
 618       break;
 619     }
 620   }
 621 }
 622 //Attempt to simulate any wave in buffer (one bit per output sample)
 623 // converts GraphBuffer to bitstream (based on zero crossings) if needed.
 624 int CmdLFSim(const char *Cmd)
 625 {
 626         int i,j;
 627         static int gap;
 628
 629         sscanf(Cmd, "%i", &gap);
 630
 631         // convert to bitstream if necessary
 632         ChkBitstream(Cmd);
 633
 634         //can send only 512 bits at a time (1 byte sent per bit...)
 635         printf("Sending [%d bytes]", GraphTraceLen);
 636         for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
 637                 UsbCommand c = {CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
 638
 639                 for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
 640                         c.d.asBytes[j] = GraphBuffer[i+j];
 641                 }
 642                 clearCommandBuffer();
 643                 SendCommand(&c);
 644                 WaitForResponse(CMD_ACK,NULL);
 645                 printf(".");
 646         }
 647
 648         PrintAndLog("\nStarting to simulate");
 649         UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
 650         clearCommandBuffer();
 651         SendCommand(&c);
 652         return 0;
 653 }
 654
 655 // by marshmellow - sim ask data given clock, fcHigh, fcLow, invert
 656 // - allow pull data from DemodBuffer
 657 int CmdLFfskSim(const char *Cmd)
 658 {
 659         //might be able to autodetect FCs and clock from Graphbuffer if using demod buffer
 660         // otherwise will need FChigh, FClow, Clock, and bitstream
 661   uint8_t fcHigh=0, fcLow=0, clk=0;
 662   uint8_t invert=0;
 663   bool errors = FALSE;
 664   char hexData[32] = {0x00}; // store entered hex data
 665   uint8_t data[255] = {0x00};
 666   int dataLen = 0;
 667   uint8_t cmdp = 0;
 668   while(param_getchar(Cmd, cmdp) != 0x00)
 669   {
 670     switch(param_getchar(Cmd, cmdp))
 671     {
 672     case 'h':
 673       return usage_lf_simfsk();
 674     case 'i':
 675       invert = 1;
 676       cmdp++;
 677       break;
 678     case 'c':
 679       errors |= param_getdec(Cmd,cmdp+1,&clk);
 680       cmdp+=2;
 681       break;
 682     case 'H':
 683       errors |= param_getdec(Cmd,cmdp+1,&fcHigh);
 684       cmdp+=2;
 685       break;
 686     case 'L':
 687       errors |= param_getdec(Cmd,cmdp+1,&fcLow);
 688       cmdp+=2;
 689       break;
 690     //case 's':
 691     //  separator=1;
 692     //  cmdp++;
 693     //  break;
 694     case 'd':
 695       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 696       if (dataLen==0) {
 697         errors=TRUE;
 698       } else {
 699         dataLen = hextobinarray((char *)data, hexData);
 700       }
 701       if (dataLen==0) errors=TRUE;
 702       if (errors) PrintAndLog ("Error getting hex data");
 703       cmdp+=2;
 704       break;
 705     default:
 706       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 707       errors = TRUE;
 708       break;
 709     }
 710     if(errors) break;
 711   }
 712   if(cmdp == 0 && DemodBufferLen == 0)
 713   {
 714     errors = TRUE;// No args
 715   }
 716
 717   //Validations
 718   if(errors)
 719   {
 720     return usage_lf_simfsk();
 721   }
 722
 723   if (dataLen == 0){ //using DemodBuffer
 724     if (clk==0 || fcHigh==0 || fcLow==0){ //manual settings must set them all
 725       uint8_t ans = fskClocks(&fcHigh, &fcLow, &clk, 0);
 726       if (ans==0){
 727         if (!fcHigh) fcHigh=10;
 728         if (!fcLow) fcLow=8;
 729         if (!clk) clk=50;
 730       }
 731     }
 732   } else {
 733     setDemodBuf(data, dataLen, 0);
 734   }
 735
 736         //default if not found
 737   if (clk == 0) clk = 50;
 738   if (fcHigh == 0) fcHigh = 10;
 739   if (fcLow == 0) fcLow = 8;
 740
 741   uint16_t arg1, arg2;
 742   arg1 = fcHigh << 8 | fcLow;
 743   arg2 = invert << 8 | clk;
 744   size_t size = DemodBufferLen;
 745   if (size > USB_CMD_DATA_SIZE) {
 746     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 747     size = USB_CMD_DATA_SIZE;
 748   }
 749   UsbCommand c = {CMD_FSK_SIM_TAG, {arg1, arg2, size}};
 750
 751   memcpy(c.d.asBytes, DemodBuffer, size);
 752   SendCommand(&c);
 753   return 0;
 754 }
 755
 756 // by marshmellow - sim ask data given clock, invert, manchester or raw, separator
 757 // - allow pull data from DemodBuffer
 758 int CmdLFaskSim(const char *Cmd)
 759 {
 760   //autodetect clock from Graphbuffer if using demod buffer
 761         // needs clock, invert, manchester/raw as m or r, separator as s, and bitstream
 762   uint8_t encoding = 1, separator = 0;
 763   uint8_t clk=0, invert=0;
 764   bool errors = FALSE;
 765   char hexData[32] = {0x00};
 766   uint8_t data[255]= {0x00}; // store entered hex data
 767   int dataLen = 0;
 768   uint8_t cmdp = 0;
 769   while(param_getchar(Cmd, cmdp) != 0x00)
 770   {
 771     switch(param_getchar(Cmd, cmdp))
 772     {
 773     case 'h':
 774       return usage_lf_simask();
 775     case 'i':
 776       invert = 1;
 777       cmdp++;
 778       break;
 779     case 'c':
 780       errors |= param_getdec(Cmd,cmdp+1,&clk);
 781       cmdp+=2;
 782       break;
 783     case 'b':
 784       encoding=2; //biphase
 785       cmdp++;
 786       break;
 787     case 'm':
 788       encoding=1;
 789       cmdp++;
 790       break;
 791     case 'r':
 792       encoding=0;
 793       cmdp++;
 794       break;
 795     case 's':
 796       separator=1;
 797       cmdp++;
 798       break;
 799     case 'd':
 800       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 801       if (dataLen==0) {
 802         errors=TRUE;
 803       } else {
 804         dataLen = hextobinarray((char *)data, hexData);
 805       }
 806       if (dataLen==0) errors=TRUE;
 807       if (errors) PrintAndLog ("Error getting hex data, datalen: %d",dataLen);
 808         cmdp+=2;
 809       break;
 810     default:
 811       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 812       errors = TRUE;
 813       break;
 814     }
 815     if(errors) break;
 816   }
 817   if(cmdp == 0 && DemodBufferLen == 0)
 818   {
 819     errors = TRUE;// No args
 820   }
 821
 822   //Validations
 823   if(errors)
 824   {
 825     return usage_lf_simask();
 826   }
 827   if (dataLen == 0){ //using DemodBuffer
 828     if (clk == 0) clk = GetAskClock("0", false, false);
 829   } else {
 830     setDemodBuf(data, dataLen, 0);
 831   }
 832   if (clk == 0) clk = 64;
 833   if (encoding == 0) clk = clk/2; //askraw needs to double the clock speed
 834   uint16_t arg1, arg2;
 835   size_t size=DemodBufferLen;
 836   arg1 = clk << 8 | encoding;
 837   arg2 = invert << 8 | separator;
 838   if (size > USB_CMD_DATA_SIZE) {
 839     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 840     size = USB_CMD_DATA_SIZE;
 841   }
 842   UsbCommand c = {CMD_ASK_SIM_TAG, {arg1, arg2, size}};
 843   PrintAndLog("preparing to sim ask data: %d bits", size);
 844   memcpy(c.d.asBytes, DemodBuffer, size);
 845   SendCommand(&c);
 846   return 0;
 847 }
 848
 849 // by marshmellow - sim psk data given carrier, clock, invert
 850 // - allow pull data from DemodBuffer or parameters
 851 int CmdLFpskSim(const char *Cmd)
 852 {
 853   //might be able to autodetect FC and clock from Graphbuffer if using demod buffer
 854   //will need carrier, Clock, and bitstream
 855   uint8_t carrier=0, clk=0;
 856   uint8_t invert=0;
 857   bool errors = FALSE;
 858   char hexData[32] = {0x00}; // store entered hex data
 859   uint8_t data[255] = {0x00};
 860   int dataLen = 0;
 861   uint8_t cmdp = 0;
 862   uint8_t pskType = 1;
 863   while(param_getchar(Cmd, cmdp) != 0x00)
 864   {
 865     switch(param_getchar(Cmd, cmdp))
 866     {
 867     case 'h':
 868       return usage_lf_simpsk();
 869     case 'i':
 870       invert = 1;
 871       cmdp++;
 872       break;
 873     case 'c':
 874       errors |= param_getdec(Cmd,cmdp+1,&clk);
 875       cmdp+=2;
 876       break;
 877     case 'r':
 878       errors |= param_getdec(Cmd,cmdp+1,&carrier);
 879       cmdp+=2;
 880       break;
 881     case '1':
 882       pskType=1;
 883       cmdp++;
 884       break;
 885     case '2':
 886       pskType=2;
 887       cmdp++;
 888       break;
 889     case '3':
 890       pskType=3;
 891       cmdp++;
 892       break;
 893     case 'd':
 894       dataLen = param_getstr(Cmd, cmdp+1, hexData);
 895       if (dataLen==0) {
 896         errors=TRUE;
 897       } else {
 898         dataLen = hextobinarray((char *)data, hexData);
 899       }
 900       if (dataLen==0) errors=TRUE;
 901       if (errors) PrintAndLog ("Error getting hex data");
 902       cmdp+=2;
 903       break;
 904     default:
 905       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
 906       errors = TRUE;
 907       break;
 908     }
 909     if (errors) break;
 910   }
 911   if (cmdp == 0 && DemodBufferLen == 0)
 912   {
 913     errors = TRUE;// No args
 914   }
 915
 916   //Validations
 917   if (errors)
 918   {
 919     return usage_lf_simpsk();
 920   }
 921   if (dataLen == 0){ //using DemodBuffer
 922     PrintAndLog("Getting Clocks");
 923     if (clk==0) clk = GetPskClock("", FALSE, FALSE);
 924     PrintAndLog("clk: %d",clk);
 925     if (!carrier) carrier = GetPskCarrier("", FALSE, FALSE);
 926     PrintAndLog("carrier: %d", carrier);
 927   } else {
 928     setDemodBuf(data, dataLen, 0);
 929   }
 930
 931   if (clk <= 0) clk = 32;
 932   if (carrier == 0) carrier = 2;
 933   if (pskType != 1){
 934     if (pskType == 2){
 935       //need to convert psk2 to psk1 data before sim
 936       psk2TOpsk1(DemodBuffer, DemodBufferLen);
 937     } else {
 938       PrintAndLog("Sorry, PSK3 not yet available");
 939     }
 940   }
 941   uint16_t arg1, arg2;
 942   arg1 = clk << 8 | carrier;
 943   arg2 = invert;
 944   size_t size=DemodBufferLen;
 945   if (size > USB_CMD_DATA_SIZE) {
 946     PrintAndLog("DemodBuffer too long for current implementation - length: %d - max: %d", size, USB_CMD_DATA_SIZE);
 947     size=USB_CMD_DATA_SIZE;
 948   }
 949   UsbCommand c = {CMD_PSK_SIM_TAG, {arg1, arg2, size}};
 950   PrintAndLog("DEBUG: Sending DemodBuffer Length: %d", size);
 951   memcpy(c.d.asBytes, DemodBuffer, size);
 952   SendCommand(&c);
 953
 954   return 0;
 955 }
 956
 957 int CmdLFSimBidir(const char *Cmd)
 958 {
 959   // Set ADC to twice the carrier for a slight supersampling
 960   // HACK: not implemented in ARMSRC.
 961   PrintAndLog("Not implemented yet.");
 962   UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
 963   SendCommand(&c);
 964   return 0;
 965 }
 966
 967 int CmdVchDemod(const char *Cmd)
 968 {
 969   // Is this the entire sync pattern, or does this also include some
 970   // data bits that happen to be the same everywhere? That would be
 971   // lovely to know.
 972   static const int SyncPattern[] = {
 973     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 974     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 975     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 976     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 977     1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
 978     1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
 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   };
 984
 985   // So first, we correlate for the sync pattern, and mark that.
 986   int bestCorrel = 0, bestPos = 0;
 987   int i;
 988   // It does us no good to find the sync pattern, with fewer than
 989   // 2048 samples after it...
 990   for (i = 0; i < (GraphTraceLen-2048); i++) {
 991     int sum = 0;
 992     int j;
 993     for (j = 0; j < arraylen(SyncPattern); j++) {
 994       sum += GraphBuffer[i+j]*SyncPattern[j];
 995     }
 996     if (sum > bestCorrel) {
 997       bestCorrel = sum;
 998       bestPos = i;
 999     }
1000   }
1001   PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
1002
1003   char bits[257];
1004   bits[256] = '\0';
1005
1006   int worst = INT_MAX;
1007   int worstPos = 0;
1008
1009   for (i = 0; i < 2048; i += 8) {
1010     int sum = 0;
1011     int j;
1012     for (j = 0; j < 8; j++) {
1013       sum += GraphBuffer[bestPos+i+j];
1014     }
1015     if (sum < 0) {
1016       bits[i/8] = '.';
1017     } else {
1018       bits[i/8] = '1';
1019     }
1020     if(abs(sum) < worst) {
1021       worst = abs(sum);
1022       worstPos = i;
1023     }
1024   }
1025   PrintAndLog("bits:");
1026   PrintAndLog("%s", bits);
1027   PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
1028
1029   if (strcmp(Cmd, "clone")==0) {
1030     GraphTraceLen = 0;
1031     char *s;
1032     for(s = bits; *s; s++) {
1033       int j;
1034       for(j = 0; j < 16; j++) {
1035         GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
1036       }
1037     }
1038     RepaintGraphWindow();
1039   }
1040   return 0;
1041 }
1042
1043 //by marshmellow
1044 int CmdLFfind(const char *Cmd)
1045 {
1046   int ans=0;
1047   char cmdp = param_getchar(Cmd, 0);
1048   char testRaw = param_getchar(Cmd, 1);
1049   if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
1050     PrintAndLog("Usage:  lf search <0|1> [u]");
1051     PrintAndLog("     <use data from Graphbuffer> , if not set, try reading data from tag.");
1052     PrintAndLog("     [Search for Unknown tags] , if not set, reads only known tags.");
1053     PrintAndLog("");
1054     PrintAndLog("    sample: lf search     = try reading data from tag & search for known tags");
1055     PrintAndLog("          : lf search 1   = use data from GraphBuffer & search for known tags");
1056     PrintAndLog("          : lf search u   = try reading data from tag & search for known and unknown tags");
1057     PrintAndLog("          : lf search 1 u = use data from GraphBuffer & search for known and unknown tags");
1058
1059     return 0;
1060   }
1061
1062   if (!offline && (cmdp != '1')){
1063                 CmdLFRead("s");
1064                 getSamples("30000",false);
1065   } else if (GraphTraceLen < 1000) {
1066     PrintAndLog("Data in Graphbuffer was too small.");
1067     return 0;
1068   }
1069   if (cmdp == 'u' || cmdp == 'U') testRaw = 'u';
1070
1071   PrintAndLog("NOTE: some demods output possible binary\n  if it finds something that looks like a tag");
1072   PrintAndLog("False Positives ARE possible\n");
1073   PrintAndLog("\nChecking for known tags:\n");
1074
1075   ans=CmdFSKdemodIO("");
1076   if (ans>0) {
1077     PrintAndLog("\nValid IO Prox ID Found!");
1078     return 1;
1079   }
1080
1081   ans=CmdFSKdemodPyramid("");
1082   if (ans>0) {
1083     PrintAndLog("\nValid Pyramid ID Found!");
1084     return 1;
1085   }
1086
1087   ans=CmdFSKdemodParadox("");
1088   if (ans>0) {
1089     PrintAndLog("\nValid Paradox ID Found!");
1090     return 1;
1091   }
1092
1093   ans=CmdFSKdemodAWID("");
1094   if (ans>0) {
1095     PrintAndLog("\nValid AWID ID Found!");
1096     return 1;
1097   }
1098
1099   ans=CmdFSKdemodHID("");
1100   if (ans>0) {
1101     PrintAndLog("\nValid HID Prox ID Found!");
1102     return 1;
1103   }
1104
1105   //add psk and indala
1106   ans=CmdIndalaDecode("");
1107   if (ans>0) {
1108     PrintAndLog("\nValid Indala ID Found!");
1109     return 1;
1110   }
1111
1112   ans=CmdAskEM410xDemod("");
1113   if (ans>0) {
1114     PrintAndLog("\nValid EM410x ID Found!");
1115     return 1;
1116   }
1117
1118   ans=CmdG_Prox_II_Demod("");
1119   if (ans>0) {
1120     PrintAndLog("\nValid Guardall G-Prox II ID Found!");
1121     return 1;
1122   }
1123
1124         ans=CmdFDXBdemodBI("");
1125         if (ans>0) {
1126                 PrintAndLog("\nValid FDX-B ID Found!");
1127                 return 1;
1128         }
1129
1130         ans=EM4x50Read("", false);
1131         if (ans>0) {
1132                 PrintAndLog("\nValid EM4x50 ID Found!");
1133                 return 1;
1134         }
1135
1136         ans=CmdPSKNexWatch("");
1137         if (ans>0) {
1138                 PrintAndLog("\nValid NexWatch ID Found!");
1139                 return 1;
1140         }
1141
1142   PrintAndLog("\nNo Known Tags Found!\n");
1143   if (testRaw=='u' || testRaw=='U'){
1144     //test unknown tag formats (raw mode)
1145     PrintAndLog("\nChecking for Unknown tags:\n");
1146     ans=AutoCorrelate(4000, FALSE, FALSE);
1147
1148     if (ans > 0) {
1149
1150                 PrintAndLog("Possible Auto Correlation of %d repeating samples",ans);
1151
1152                 if ( ans % 8 == 0)  {
1153                         int bytes = (ans / 8);
1154                         PrintAndLog("Possible %d bytes", bytes);
1155                         int blocks = 0;
1156                         if ( bytes % 2 == 0) {
1157                                 blocks = (bytes / 2);
1158                                 PrintAndLog("Possible  2 blocks, width %d", blocks);
1159                         }
1160                         if ( bytes % 4 == 0) {
1161                                 blocks = (bytes / 4);
1162                                 PrintAndLog("Possible  4 blocks, width %d", blocks);
1163                         }
1164                         if ( bytes % 8 == 0) {
1165                                 blocks = (bytes / 8);
1166                                 PrintAndLog("Possible  8 blocks, width %d", blocks);
1167                         }
1168                         if ( bytes % 16 == 0) {
1169                                 blocks = (bytes / 16);
1170                                 PrintAndLog("Possible 16 blocks, width %d", blocks);
1171                         }
1172                 }
1173         }
1174                 ans=GetFskClock("",FALSE,FALSE);
1175     if (ans != 0){ //fsk
1176                         ans=FSKrawDemod("",TRUE);
1177       if (ans>0) {
1178         PrintAndLog("\nUnknown FSK Modulated Tag Found!");
1179         return 1;
1180       }
1181     }
1182                 ans=ASKDemod("0 0 0",TRUE,FALSE,1);
1183     if (ans>0) {
1184       PrintAndLog("\nUnknown ASK Modulated and Manchester encoded Tag Found!");
1185       PrintAndLog("\nif it does not look right it could instead be ASK/Biphase - try 'data rawdemod ab'");
1186       return 1;
1187     }
1188     ans=CmdPSK1rawDemod("");
1189     if (ans>0) {
1190       PrintAndLog("Possible unknown PSK1 Modulated Tag Found above!\n\nCould also be PSK2 - try 'data rawdemod p2'");
1191       PrintAndLog("\nCould also be PSK3 - [currently not supported]");
1192       PrintAndLog("\nCould also be NRZ - try 'data nrzrawdemod");
1193       return 1;
1194     }
1195     PrintAndLog("\nNo Data Found!\n");
1196   }
1197   return 0;
1198 }
1199
1200 static command_t CommandTable[] =
1201 {
1202   {"help",        CmdHelp,            1, "This help"},
1203         {"awid",        CmdLFAWID,          1, "{ AWID RFIDs... }"},
1204   {"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
1205   {"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},
1206   {"hitag",       CmdLFHitag,         1, "{ HITAG RFIDs... }"},
1207   {"io",          CmdLFIO,                1, "{ IOPROX RFIDs... }"},
1208   {"pcf7931",     CmdLFPCF7931,       1, "{ PCF7931 RFIDs... }"},
1209   {"ti",          CmdLFTI,            1, "{ TI RFIDs... }"},
1210   {"t55xx",       CmdLFT55XX,         1, "{ T55X7 RFIDs... }"},
1211   {"viking",      CmdLFViking,        1, "{ Viking RFIDs... }"},
1212   {"config",      CmdLFSetConfig,     0, "Set config for LF sampling, bit/sample, decimation, frequency"},
1213
1214   {"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)"},
1215   {"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
1216   {"indalademod", CmdIndalaDemod,     1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
1217   {"indalaclone", CmdIndalaClone,     0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
1218   {"read",        CmdLFRead,          0, "['s' silent] Read 125/134 kHz LF ID-only tag. Do 'lf read h' for help"},
1219   {"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"},
1220   {"sim",         CmdLFSim,           0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
1221   {"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"},
1222   {"simfsk",      CmdLFfskSim,        0, "[c <clock>] [i] [H <fcHigh>] [L <fcLow>] [d <hexdata>] \n\t\t-- Simulate LF FSK tag from demodbuffer or input"},
1223   {"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"},
1224   {"simbidir",    CmdLFSimBidir,      0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
1225   {"snoop",       CmdLFSnoop,         0, "['l'|'h'|<divisor>] [trigger threshold] -- Snoop LF (l:125khz, h:134khz)"},
1226   {"vchdemod",    CmdVchDemod,        1, "['clone'] -- Demodulate samples for VeriChip"},
1227   {NULL, NULL, 0, NULL}
1228 };
1229
1230 int CmdLF(const char *Cmd)
1231 {
1232   CmdsParse(CommandTable, Cmd);
1233   return 0;
1234 }
1235
1236 int CmdHelp(const char *Cmd)
1237 {
1238   CmdsHelp(CommandTable);
1239   return 0;
1240 }