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