[proxmark3-svn] / client / cmdlf.c

//-----------------------------------------------------------------------------
// Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
//
// This code is licensed to you under the terms of the GNU GPL, version 2 or,
// at your option, any later version. See the LICENSE.txt file for the text of
// the license.
//-----------------------------------------------------------------------------
// Low frequency commands
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "proxmark3.h"
#include "data.h"
#include "graph.h"
#include "ui.h"
#include "cmdparser.h"
#include "cmdmain.h"
#include "cmddata.h"
#include "util.h"
#include "cmdlf.h"
#include "cmdlfhid.h"
#include "cmdlfti.h"
#include "cmdlfem4x.h"
#include "cmdlfhitag.h"
#include "cmdlft55xx.h"
#include "cmdlfpcf7931.h"
#include "cmdlfio.h"

static int CmdHelp(const char *Cmd);

/* send a command before reading */
int CmdLFCommandRead(const char *Cmd)
{
  static char dummy[3];

  dummy[0]= ' ';

  UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
  sscanf(Cmd, "%"lli" %"lli" %"lli" %s %s", &c.arg[0], &c.arg[1], &c.arg[2],(char*)(&c.d.asBytes),(char*)(&dummy+1));
  // in case they specified 'h'
  strcpy((char *)&c.d.asBytes + strlen((char *)c.d.asBytes), dummy);
  SendCommand(&c);
  return 0;
}

int CmdFlexdemod(const char *Cmd)
{
  int i;
  for (i = 0; i < GraphTraceLen; ++i) {
    if (GraphBuffer[i] < 0) {
      GraphBuffer[i] = -1;
    } else {
      GraphBuffer[i] = 1;
    }
  }

#define LONG_WAIT 100
  int start;
  for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
    int first = GraphBuffer[start];
    for (i = start; i < start + LONG_WAIT; i++) {
      if (GraphBuffer[i] != first) {
        break;
      }
    }
    if (i == (start + LONG_WAIT)) {
      break;
    }
  }
  if (start == GraphTraceLen - LONG_WAIT) {
    PrintAndLog("nothing to wait for");
    return 0;
  }

  GraphBuffer[start] = 2;
  GraphBuffer[start+1] = -2;
	uint8_t bits[64] = {0x00};

	int bit, sum;
  i = start;
  for (bit = 0; bit < 64; bit++) {
		sum = 0;
		for (int j = 0; j < 16; j++) {
      sum += GraphBuffer[i++];
    }

		bits[bit] = (sum > 0) ? 1 : 0;

    PrintAndLog("bit %d sum %d", bit, sum);
  }

  for (bit = 0; bit < 64; bit++) {
    int j;
    int sum = 0;
    for (j = 0; j < 16; j++) {
      sum += GraphBuffer[i++];
    }
    if (sum > 0 && bits[bit] != 1) {
      PrintAndLog("oops1 at %d", bit);
    }
    if (sum < 0 && bits[bit] != 0) {
      PrintAndLog("oops2 at %d", bit);
    }
  }

	// HACK writing back to graphbuffer.
  GraphTraceLen = 32*64;
  i = 0;
  int phase = 0;
  for (bit = 0; bit < 64; bit++) {
	
		phase = (bits[bit] == 0) ? 0 : 1;
		
    int j;
    for (j = 0; j < 32; j++) {
      GraphBuffer[i++] = phase;
      phase = !phase;
    }
  }

  RepaintGraphWindow();
  return 0;
}
  
int CmdIndalaDemod(const char *Cmd)
{
  // Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID

  int state = -1;
  int count = 0;
  int i, j;

  // worst case with GraphTraceLen=64000 is < 4096
  // under normal conditions it's < 2048

  uint8_t rawbits[4096];
  int rawbit = 0;
  int worst = 0, worstPos = 0;
 // PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
  for (i = 0; i < GraphTraceLen-1; i += 2) {
    count += 1;
    if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
      if (state == 0) {
        for (j = 0; j <  count - 8; j += 16) {
          rawbits[rawbit++] = 0;
        }
        if ((abs(count - j)) > worst) {
          worst = abs(count - j);
          worstPos = i;
        }
      }
      state = 1;
      count = 0;
    } else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
      if (state == 1) {
        for (j = 0; j <  count - 8; j += 16) {
          rawbits[rawbit++] = 1;
        }
        if ((abs(count - j)) > worst) {
          worst = abs(count - j);
          worstPos = i;
        }
      }
      state = 0;
      count = 0;
    }
  }
  
  if (rawbit>0){
    PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
    PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
	} else {
		return 0;
	}

  // Finding the start of a UID
  int uidlen, long_wait;
  if (strcmp(Cmd, "224") == 0) {
    uidlen = 224;
    long_wait = 30;
  } else {
    uidlen = 64;
    long_wait = 29;
  }

  int start;
  int first = 0;
  for (start = 0; start <= rawbit - uidlen; start++) {
    first = rawbits[start];
    for (i = start; i < start + long_wait; i++) {
      if (rawbits[i] != first) {
        break;
      }
    }
    if (i == (start + long_wait)) {
      break;
    }
  }
  
  if (start == rawbit - uidlen + 1) {
    PrintAndLog("nothing to wait for");
    return 0;
  }

  // Inverting signal if needed
  if (first == 1) {
    for (i = start; i < rawbit; i++) {
      rawbits[i] = !rawbits[i];
    }
  }

  // Dumping UID
	uint8_t bits[224] = {0x00};
	char showbits[225] = {0x00};
  int bit;
  i = start;
  int times = 0;
	
  if (uidlen > rawbit) {
    PrintAndLog("Warning: not enough raw bits to get a full UID");
    for (bit = 0; bit < rawbit; bit++) {
      bits[bit] = rawbits[i++];
      // As we cannot know the parity, let's use "." and "/"
      showbits[bit] = '.' + bits[bit];
    }
    showbits[bit+1]='\0';
    PrintAndLog("Partial UID=%s", showbits);
    return 0;
  } else {
    for (bit = 0; bit < uidlen; bit++) {
      bits[bit] = rawbits[i++];
      showbits[bit] = '0' + bits[bit];
    }
    times = 1;
  }
  
  //convert UID to HEX
  uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
  int idx;
	uid1 = uid2 = 0;
	
  if (uidlen==64){
    for( idx=0; idx<64; idx++) {
        if (showbits[idx] == '0') {
        uid1=(uid1<<1)|(uid2>>31);
        uid2=(uid2<<1)|0;
        } else {
        uid1=(uid1<<1)|(uid2>>31);
        uid2=(uid2<<1)|1;
        } 
      }
    PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
  }
  else {
		uid3 = uid4 = uid5 = uid6 = uid7 = 0;

    for( idx=0; idx<224; idx++) {
        uid1=(uid1<<1)|(uid2>>31);
        uid2=(uid2<<1)|(uid3>>31);
        uid3=(uid3<<1)|(uid4>>31);
        uid4=(uid4<<1)|(uid5>>31);
        uid5=(uid5<<1)|(uid6>>31);
        uid6=(uid6<<1)|(uid7>>31);
			
			if (showbits[idx] == '0') 
				uid7 = (uid7<<1) | 0;
			else 
				uid7 = (uid7<<1) | 1;
      }
    PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
  }

  // Checking UID against next occurrences
    int failed = 0;
	for (; i + uidlen <= rawbit;) {
		failed = 0;
    for (bit = 0; bit < uidlen; bit++) {
      if (bits[bit] != rawbits[i++]) {
        failed = 1;
        break;
      }
    }
    if (failed == 1) {
      break;
    }
    times += 1;
  }

  PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);

  // Remodulating for tag cloning
	// HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod) 
	// since this changes graphbuffer data.
  GraphTraceLen = 32*uidlen;
  i = 0;
  int phase = 0;
  for (bit = 0; bit < uidlen; bit++) {
    if (bits[bit] == 0) {
      phase = 0;
    } else {
      phase = 1;
    }
    int j;
    for (j = 0; j < 32; j++) {
      GraphBuffer[i++] = phase;
      phase = !phase;
    }
  }

  RepaintGraphWindow();
  return 1;
}

int CmdIndalaClone(const char *Cmd)
{
  UsbCommand c;
	unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;

	uid1 =  uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
  int n = 0, i = 0;

  if (strchr(Cmd,'l') != 0) {
    while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
      uid1 = (uid1 << 4) | (uid2 >> 28);
      uid2 = (uid2 << 4) | (uid3 >> 28);
      uid3 = (uid3 << 4) | (uid4 >> 28);
      uid4 = (uid4 << 4) | (uid5 >> 28);
      uid5 = (uid5 << 4) | (uid6 >> 28);
      uid6 = (uid6 << 4) | (uid7 >> 28);
    	uid7 = (uid7 << 4) | (n & 0xf);
    }
    PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
    c.cmd = CMD_INDALA_CLONE_TAG_L;
    c.d.asDwords[0] = uid1;
    c.d.asDwords[1] = uid2;
    c.d.asDwords[2] = uid3;
    c.d.asDwords[3] = uid4;
    c.d.asDwords[4] = uid5;
    c.d.asDwords[5] = uid6;
    c.d.asDwords[6] = uid7;
	} else {
    while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
      uid1 = (uid1 << 4) | (uid2 >> 28);
      uid2 = (uid2 << 4) | (n & 0xf);
    }
    PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
    c.cmd = CMD_INDALA_CLONE_TAG;
    c.arg[0] = uid1;
    c.arg[1] = uid2;
  }

  SendCommand(&c);
  return 0;
}

int CmdLFRead(const char *Cmd)
{
  UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K};

  // 'h' means higher-low-frequency, 134 kHz
  if(*Cmd == 'h') {
    c.arg[0] = 1;
  } else if (*Cmd == '\0') {
    c.arg[0] = 0;
  } else if (sscanf(Cmd, "%"lli, &c.arg[0]) != 1) {
		PrintAndLog("Samples 1: 'lf read'");
		PrintAndLog("        2: 'lf read h'");
		PrintAndLog("        3: 'lf read <divisor>'");
    return 0;
  }
  SendCommand(&c);
  WaitForResponse(CMD_ACK,NULL);
  return 0;
}

static void ChkBitstream(const char *str)
{
  int i;

  /* convert to bitstream if necessary */
	for (i = 0; i < (int)(GraphTraceLen / 2); i++){
		if (GraphBuffer[i] > 1 || GraphBuffer[i] < 0) {
      CmdBitstream(str);
      break;
    }
  }
}

int CmdLFSim(const char *Cmd)
{
	int i,j;
  static int gap;

  sscanf(Cmd, "%i", &gap);

  /* convert to bitstream if necessary */
  ChkBitstream(Cmd);

	printf("Sending [%d bytes]", GraphTraceLen);
	for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
    UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};

		for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
      c.d.asBytes[j] = GraphBuffer[i+j];
    }
    SendCommand(&c);
    WaitForResponse(CMD_ACK,NULL);
		printf(".");
  }

	printf("\n");
	PrintAndLog("Starting to simulate");
  UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
  SendCommand(&c);
  return 0;
}

int CmdLFSimBidir(const char *Cmd)
{
  // Set ADC to twice the carrier for a slight supersampling
  // HACK: not implemented in ARMSRC.
  PrintAndLog("Not implemented yet.");
  UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
  SendCommand(&c);
  return 0;
}

/* simulate an LF Manchester encoded tag with specified bitstream, clock rate and inter-id gap */
int CmdLFSimManchester(const char *Cmd)
{
  static int clock, gap;
  static char data[1024], gapstring[8];

  sscanf(Cmd, "%i %s %i", &clock, &data[0], &gap);

  ClearGraph(0);

  for (int i = 0; i < strlen(data) ; ++i)
    AppendGraph(0, clock, data[i]- '0');

  CmdManchesterMod("");

  RepaintGraphWindow();

  sprintf(&gapstring[0], "%i", gap);
  CmdLFSim(gapstring);
  return 0;
}

int CmdLFSnoop(const char *Cmd)
{
  UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};

  // 'h' means higher-low-frequency, 134 kHz
  c.arg[0] = 0;
  c.arg[1] = -1;

	if (*Cmd == 'l') {
    sscanf(Cmd, "l %"lli, &c.arg[1]);
  } else if(*Cmd == 'h') {
    c.arg[0] = 1;
    sscanf(Cmd, "h %"lli, &c.arg[1]);
  } else if (sscanf(Cmd, "%"lli" %"lli, &c.arg[0], &c.arg[1]) < 1) {
		PrintAndLog("usage 1:  snoop");
		PrintAndLog("      2:  snoop {l,h} [trigger threshold]");
		PrintAndLog("      3:  snoop <divisor> [trigger threshold]");
    return 0;
  }

  SendCommand(&c);
  WaitForResponse(CMD_ACK,NULL);
  return 0;
}

int CmdVchDemod(const char *Cmd)
{
  // Is this the entire sync pattern, or does this also include some
  // data bits that happen to be the same everywhere? That would be
  // lovely to know.
  static const int SyncPattern[] = {
    1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
    1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
    1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
    1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
    1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
    1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
    1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
  };

  // So first, we correlate for the sync pattern, and mark that.
  int bestCorrel = 0, bestPos = 0;
  int i;
  // It does us no good to find the sync pattern, with fewer than
  // 2048 samples after it...
  for (i = 0; i < (GraphTraceLen-2048); i++) {
    int sum = 0;
    int j;
    for (j = 0; j < arraylen(SyncPattern); j++) {
      sum += GraphBuffer[i+j]*SyncPattern[j];
    }
    if (sum > bestCorrel) {
      bestCorrel = sum;
      bestPos = i;
    }
  }
  PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);

  char bits[257];
  bits[256] = '\0';

  int worst = INT_MAX;
  int worstPos = 0;

  for (i = 0; i < 2048; i += 8) {
    int sum = 0;
    int j;
    for (j = 0; j < 8; j++) {
      sum += GraphBuffer[bestPos+i+j];
    }
    if (sum < 0) {
      bits[i/8] = '.';
    } else {
      bits[i/8] = '1';
    }
    if(abs(sum) < worst) {
      worst = abs(sum);
      worstPos = i;
    }
  }
  PrintAndLog("bits:");
  PrintAndLog("%s", bits);
  PrintAndLog("worst metric: %d at pos %d", worst, worstPos);

  if (strcmp(Cmd, "clone")==0) {
    GraphTraceLen = 0;
    char *s;
    for(s = bits; *s; s++) {
      int j;
      for(j = 0; j < 16; j++) {
        GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
      }
    }
    RepaintGraphWindow();
  }
  return 0;
}

//by marshmellow
int CmdLFfind(const char *Cmd)
{
  int ans=0;
	char cmdp = param_getchar(Cmd, 0);
	
	if (strlen(Cmd) > 1 || cmdp == 'h' || cmdp == 'H') {
		PrintAndLog("Usage:  lf search <0|1>");
		PrintAndLog("     <use data from Graphbuffer>, if not set, try reading data from tag.");
		PrintAndLog("");
		PrintAndLog("    sample: lf search");
		PrintAndLog("          : lf search 1");
		return 0;
	}

	if (!offline && (cmdp != '1')){
    ans=CmdLFRead("");
    ans=CmdSamples("20000");
	} else if (GraphTraceLen < 1000) {
		PrintAndLog("Data in Graphbuffer was too small.");
		return 0;
  }

  PrintAndLog("NOTE: some demods output possible binary\n  if it finds something that looks like a tag");
  PrintAndLog("Checking for known tags:");
  ans=CmdFSKdemodIO("");
  if (ans>0) {
    PrintAndLog("Valid IO Prox ID Found!");
    return 1;
  }
  ans=CmdFSKdemodHID("");
  if (ans>0) {
    PrintAndLog("Valid HID Prox ID Found!");
    return 1;
  }
  //add psk and indala
  ans=CmdIndalaDecode("0");
  if (ans>0) {
    PrintAndLog("Valid Indala ID Found!");
    return 1;
  }
  ans=Cmdaskmandemod("");
  if (ans>0) {
    PrintAndLog("Valid EM410x ID Found!");
    return 1;
  }
  PrintAndLog("No Known Tags Found!\n");
  return 0;
}

static command_t CommandTable[] = 
{
  {"help",        CmdHelp,            1, "This help"},
  {"cmdread",     CmdLFCommandRead,   0, "<off period> <'0' period> <'1' period> <command> ['h'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'h' for 134)"},
  {"em4x",        CmdLFEM4X,          1, "{ EM4X RFIDs... }"},
  {"flexdemod",   CmdFlexdemod,       1, "Demodulate samples for FlexPass"},
  {"hid",         CmdLFHID,           1, "{ HID RFIDs... }"},
  {"io",       	  CmdLFIO,	          1, "{ ioProx tags... }"},
  {"indalademod", CmdIndalaDemod,     1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
  {"indalaclone", CmdIndalaClone,     0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
  {"read",        CmdLFRead,          0, "['h' or <divisor>] -- Read 125/134 kHz LF ID-only tag (option 'h' for 134, alternatively: f=12MHz/(divisor+1))"},
  {"search",      CmdLFfind,          1, "Read and Search for valid known tag (in offline mode it you can load first then search)"},
  {"sim",         CmdLFSim,           0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
  {"simbidir",    CmdLFSimBidir,      0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
  {"simman",      CmdLFSimManchester, 0, "<Clock> <Bitstream> [GAP] Simulate arbitrary Manchester LF tag"},
  {"snoop",       CmdLFSnoop,         0, "['l'|'h'|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
  {"ti",          CmdLFTI,            1, "{ TI RFIDs... }"},
  {"hitag",       CmdLFHitag,         1, "{ Hitag tags and transponders... }"},
  {"vchdemod",    CmdVchDemod,        1, "['clone'] -- Demodulate samples for VeriChip"},
  {"t55xx",       CmdLFT55XX,         1, "{ T55xx RFIDs... }"},
  {"pcf7931",     CmdLFPCF7931,       1, "{PCF7931 RFIDs...}"},
  {NULL, NULL, 0, NULL}
};

int CmdLF(const char *Cmd)
{
  CmdsParse(CommandTable, Cmd);
  return 0; 
}

int CmdHelp(const char *Cmd)
{
  CmdsHelp(CommandTable);
  return 0;
}
Commit	Line	Data
a553f267	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
7fe9b0b7	11	#include <stdio.h>
590f8ff9	12	#include <stdlib.h>
7fe9b0b7	13	#include <string.h>
393c3ef9	14	#include <limits.h>
902cb3c0	15	#include "proxmark3.h"
7fe9b0b7	16	#include "data.h"
	17	#include "graph.h"
	18	#include "ui.h"
	19	#include "cmdparser.h"
040a7baa	20	#include "cmdmain.h"
7fe9b0b7	21	#include "cmddata.h"
31d1caa5	22	#include "util.h"
7fe9b0b7	23	#include "cmdlf.h"
	24	#include "cmdlfhid.h"
	25	#include "cmdlfti.h"
	26	#include "cmdlfem4x.h"
db09cb3a	27	#include "cmdlfhitag.h"
54a942b0	28	#include "cmdlft55xx.h"
54a942b0	29	#include "cmdlfpcf7931.h"
a1f3bb12	30	#include "cmdlfio.h"
7fe9b0b7	31
	32	static int CmdHelp(const char *Cmd);
	33
	34	/* send a command before reading */
	35	int CmdLFCommandRead(const char *Cmd)
	36	{
	37	static char dummy[3];
	38
	39	dummy[0]= ' ';
	40
	41	UsbCommand c = {CMD_MOD_THEN_ACQUIRE_RAW_ADC_SAMPLES_125K};
1a07fd51	42	sscanf(Cmd, "%"lli" %"lli" %"lli" %s %s", &c.arg[0], &c.arg[1], &c.arg[2],(char)(&c.d.asBytes),(char)(&dummy+1));
7fe9b0b7	43	// in case they specified 'h'
	44	strcpy((char )&c.d.asBytes + strlen((char )c.d.asBytes), dummy);
	45	SendCommand(&c);
	46	return 0;
	47	}
	48
	49	int CmdFlexdemod(const char *Cmd)
	50	{
	51	int i;
	52	for (i = 0; i < GraphTraceLen; ++i) {
	53	if (GraphBuffer[i] < 0) {
	54	GraphBuffer[i] = -1;
	55	} else {
	56	GraphBuffer[i] = 1;
	57	}
	58	}
	59
	60	#define LONG_WAIT 100
	61	int start;
	62	for (start = 0; start < GraphTraceLen - LONG_WAIT; start++) {
	63	int first = GraphBuffer[start];
	64	for (i = start; i < start + LONG_WAIT; i++) {
	65	if (GraphBuffer[i] != first) {
	66	break;
	67	}
	68	}
	69	if (i == (start + LONG_WAIT)) {
	70	break;
	71	}
	72	}
	73	if (start == GraphTraceLen - LONG_WAIT) {
	74	PrintAndLog("nothing to wait for");
	75	return 0;
	76	}
	77
	78	GraphBuffer[start] = 2;
	79	GraphBuffer[start+1] = -2;
3fe4ff4f	80	uint8_t bits[64] = {0x00};
7fe9b0b7	81
3fe4ff4f	82	int bit, sum;
7fe9b0b7	83	i = start;
7fe9b0b7	84	for (bit = 0; bit < 64; bit++) {
3fe4ff4f	85	sum = 0;
3fe4ff4f	86	for (int j = 0; j < 16; j++) {
7fe9b0b7	87	sum += GraphBuffer[i++];
7fe9b0b7	88	}
3fe4ff4f	89
	90	bits[bit] = (sum > 0) ? 1 : 0;
	91
7fe9b0b7	92	PrintAndLog("bit %d sum %d", bit, sum);
	93	}
	94
	95	for (bit = 0; bit < 64; bit++) {
	96	int j;
	97	int sum = 0;
	98	for (j = 0; j < 16; j++) {
	99	sum += GraphBuffer[i++];
	100	}
	101	if (sum > 0 && bits[bit] != 1) {
	102	PrintAndLog("oops1 at %d", bit);
	103	}
	104	if (sum < 0 && bits[bit] != 0) {
	105	PrintAndLog("oops2 at %d", bit);
	106	}
	107	}
	108
3fe4ff4f	109	// HACK writing back to graphbuffer.
7fe9b0b7	110	GraphTraceLen = 32*64;
	111	i = 0;
	112	int phase = 0;
	113	for (bit = 0; bit < 64; bit++) {
3fe4ff4f	114
	115	phase = (bits[bit] == 0) ? 0 : 1;
	116
7fe9b0b7	117	int j;
	118	for (j = 0; j < 32; j++) {
	119	GraphBuffer[i++] = phase;
	120	phase = !phase;
	121	}
	122	}
	123
	124	RepaintGraphWindow();
	125	return 0;
	126	}
a1f3bb12	127
7fe9b0b7	128	int CmdIndalaDemod(const char *Cmd)
	129	{
	130	// Usage: recover 64bit UID by default, specify "224" as arg to recover a 224bit UID
	131
	132	int state = -1;
	133	int count = 0;
	134	int i, j;
3fe4ff4f	135
7fe9b0b7	136	// worst case with GraphTraceLen=64000 is < 4096
7fe9b0b7	137	// under normal conditions it's < 2048
3fe4ff4f	138
7fe9b0b7	139	uint8_t rawbits[4096];
	140	int rawbit = 0;
	141	int worst = 0, worstPos = 0;
d5a72d2f	142	// PrintAndLog("Expecting a bit less than %d raw bits", GraphTraceLen / 32);
7fe9b0b7	143	for (i = 0; i < GraphTraceLen-1; i += 2) {
	144	count += 1;
	145	if ((GraphBuffer[i] > GraphBuffer[i + 1]) && (state != 1)) {
	146	if (state == 0) {
	147	for (j = 0; j < count - 8; j += 16) {
	148	rawbits[rawbit++] = 0;
	149	}
	150	if ((abs(count - j)) > worst) {
	151	worst = abs(count - j);
	152	worstPos = i;
	153	}
	154	}
	155	state = 1;
	156	count = 0;
	157	} else if ((GraphBuffer[i] < GraphBuffer[i + 1]) && (state != 0)) {
	158	if (state == 1) {
	159	for (j = 0; j < count - 8; j += 16) {
	160	rawbits[rawbit++] = 1;
	161	}
	162	if ((abs(count - j)) > worst) {
	163	worst = abs(count - j);
	164	worstPos = i;
	165	}
	166	}
	167	state = 0;
	168	count = 0;
	169	}
	170	}
3fe4ff4f	171
d5a72d2f	172	if (rawbit>0){
	173	PrintAndLog("Recovered %d raw bits, expected: %d", rawbit, GraphTraceLen/32);
	174	PrintAndLog("worst metric (0=best..7=worst): %d at pos %d", worst, worstPos);
3fe4ff4f	175	} else {
	176	return 0;
	177	}
	178
7fe9b0b7	179	// Finding the start of a UID
	180	int uidlen, long_wait;
	181	if (strcmp(Cmd, "224") == 0) {
	182	uidlen = 224;
	183	long_wait = 30;
	184	} else {
	185	uidlen = 64;
	186	long_wait = 29;
	187	}
3fe4ff4f	188
7fe9b0b7	189	int start;
	190	int first = 0;
	191	for (start = 0; start <= rawbit - uidlen; start++) {
	192	first = rawbits[start];
	193	for (i = start; i < start + long_wait; i++) {
	194	if (rawbits[i] != first) {
	195	break;
	196	}
	197	}
	198	if (i == (start + long_wait)) {
	199	break;
	200	}
	201	}
3fe4ff4f	202
7fe9b0b7	203	if (start == rawbit - uidlen + 1) {
	204	PrintAndLog("nothing to wait for");
	205	return 0;
	206	}
	207
	208	// Inverting signal if needed
	209	if (first == 1) {
	210	for (i = start; i < rawbit; i++) {
	211	rawbits[i] = !rawbits[i];
	212	}
	213	}
	214
	215	// Dumping UID
3fe4ff4f	216	uint8_t bits[224] = {0x00};
3fe4ff4f	217	char showbits[225] = {0x00};
7fe9b0b7	218	int bit;
	219	i = start;
	220	int times = 0;
3fe4ff4f	221
7fe9b0b7	222	if (uidlen > rawbit) {
	223	PrintAndLog("Warning: not enough raw bits to get a full UID");
	224	for (bit = 0; bit < rawbit; bit++) {
	225	bits[bit] = rawbits[i++];
	226	// As we cannot know the parity, let's use "." and "/"
	227	showbits[bit] = '.' + bits[bit];
	228	}
	229	showbits[bit+1]='\0';
	230	PrintAndLog("Partial UID=%s", showbits);
	231	return 0;
	232	} else {
	233	for (bit = 0; bit < uidlen; bit++) {
	234	bits[bit] = rawbits[i++];
	235	showbits[bit] = '0' + bits[bit];
	236	}
	237	times = 1;
	238	}
2414f978	239
	240	//convert UID to HEX
	241	uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
	242	int idx;
3fe4ff4f	243	uid1 = uid2 = 0;
3fe4ff4f	244
2414f978	245	if (uidlen==64){
	246	for( idx=0; idx<64; idx++) {
	247	if (showbits[idx] == '0') {
	248	uid1=(uid1<<1)\|(uid2>>31);
	249	uid2=(uid2<<1)\|0;
	250	} else {
	251	uid1=(uid1<<1)\|(uid2>>31);
	252	uid2=(uid2<<1)\|1;
	253	}
	254	}
	255	PrintAndLog("UID=%s (%x%08x)", showbits, uid1, uid2);
	256	}
	257	else {
3fe4ff4f	258	uid3 = uid4 = uid5 = uid6 = uid7 = 0;
3fe4ff4f	259
2414f978	260	for( idx=0; idx<224; idx++) {
	261	uid1=(uid1<<1)\|(uid2>>31);
	262	uid2=(uid2<<1)\|(uid3>>31);
	263	uid3=(uid3<<1)\|(uid4>>31);
	264	uid4=(uid4<<1)\|(uid5>>31);
	265	uid5=(uid5<<1)\|(uid6>>31);
	266	uid6=(uid6<<1)\|(uid7>>31);
3fe4ff4f	267
	268	if (showbits[idx] == '0')
	269	uid7 = (uid7<<1) \| 0;
	270	else
	271	uid7 = (uid7<<1) \| 1;
2414f978	272	}
	273	PrintAndLog("UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
	274	}
7fe9b0b7	275
0ff9a939	276	// Checking UID against next occurrences
7fe9b0b7	277	int failed = 0;
3fe4ff4f	278	for (; i + uidlen <= rawbit;) {
3fe4ff4f	279	failed = 0;
7fe9b0b7	280	for (bit = 0; bit < uidlen; bit++) {
	281	if (bits[bit] != rawbits[i++]) {
	282	failed = 1;
	283	break;
	284	}
	285	}
	286	if (failed == 1) {
	287	break;
	288	}
	289	times += 1;
	290	}
3fe4ff4f	291
0ff9a939	292	PrintAndLog("Occurrences: %d (expected %d)", times, (rawbit - start) / uidlen);
7fe9b0b7	293
7fe9b0b7	294	// Remodulating for tag cloning
3fe4ff4f	295	// HACK: 2015-01-04 this will have an impact on our new way of seening lf commands (demod)
3fe4ff4f	296	// since this changes graphbuffer data.
7fe9b0b7	297	GraphTraceLen = 32*uidlen;
	298	i = 0;
	299	int phase = 0;
	300	for (bit = 0; bit < uidlen; bit++) {
	301	if (bits[bit] == 0) {
	302	phase = 0;
	303	} else {
	304	phase = 1;
	305	}
	306	int j;
	307	for (j = 0; j < 32; j++) {
	308	GraphBuffer[i++] = phase;
	309	phase = !phase;
	310	}
	311	}
	312
	313	RepaintGraphWindow();
d5a72d2f	314	return 1;
7fe9b0b7	315	}
7fe9b0b7	316
2414f978	317	int CmdIndalaClone(const char *Cmd)
2414f978	318	{
2414f978	319	UsbCommand c;
3fe4ff4f	320	unsigned int uid1, uid2, uid3, uid4, uid5, uid6, uid7;
	321
	322	uid1 = uid2 = uid3 = uid4 = uid5 = uid6 = uid7 = 0;
2414f978	323	int n = 0, i = 0;
	324
	325	if (strchr(Cmd,'l') != 0) {
	326	while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
	327	uid1 = (uid1 << 4) \| (uid2 >> 28);
	328	uid2 = (uid2 << 4) \| (uid3 >> 28);
	329	uid3 = (uid3 << 4) \| (uid4 >> 28);
	330	uid4 = (uid4 << 4) \| (uid5 >> 28);
	331	uid5 = (uid5 << 4) \| (uid6 >> 28);
	332	uid6 = (uid6 << 4) \| (uid7 >> 28);
	333	uid7 = (uid7 << 4) \| (n & 0xf);
	334	}
	335	PrintAndLog("Cloning 224bit tag with UID %x%08x%08x%08x%08x%08x%08x", uid1, uid2, uid3, uid4, uid5, uid6, uid7);
	336	c.cmd = CMD_INDALA_CLONE_TAG_L;
	337	c.d.asDwords[0] = uid1;
	338	c.d.asDwords[1] = uid2;
	339	c.d.asDwords[2] = uid3;
	340	c.d.asDwords[3] = uid4;
	341	c.d.asDwords[4] = uid5;
	342	c.d.asDwords[5] = uid6;
	343	c.d.asDwords[6] = uid7;
3fe4ff4f	344	} else {
2414f978	345	while (sscanf(&Cmd[i++], "%1x", &n ) == 1) {
	346	uid1 = (uid1 << 4) \| (uid2 >> 28);
	347	uid2 = (uid2 << 4) \| (n & 0xf);
	348	}
	349	PrintAndLog("Cloning 64bit tag with UID %x%08x", uid1, uid2);
	350	c.cmd = CMD_INDALA_CLONE_TAG;
	351	c.arg[0] = uid1;
	352	c.arg[1] = uid2;
	353	}
	354
	355	SendCommand(&c);
	356	return 0;
	357	}
	358
7fe9b0b7	359	int CmdLFRead(const char *Cmd)
	360	{
	361	UsbCommand c = {CMD_ACQUIRE_RAW_ADC_SAMPLES_125K};
3fe4ff4f	362
7fe9b0b7	363	// 'h' means higher-low-frequency, 134 kHz
	364	if(*Cmd == 'h') {
	365	c.arg[0] = 1;
	366	} else if (*Cmd == '\0') {
	367	c.arg[0] = 0;
f66021cf	368	} else if (sscanf(Cmd, "%"lli, &c.arg[0]) != 1) {
3fe4ff4f	369	PrintAndLog("Samples 1: 'lf read'");
	370	PrintAndLog(" 2: 'lf read h'");
	371	PrintAndLog(" 3: 'lf read <divisor>'");
7fe9b0b7	372	return 0;
	373	}
	374	SendCommand(&c);
902cb3c0	375	WaitForResponse(CMD_ACK,NULL);
7fe9b0b7	376	return 0;
	377	}
	378
	379	static void ChkBitstream(const char *str)
	380	{
	381	int i;
	382
	383	/* convert to bitstream if necessary */
b915fda3	384	for (i = 0; i < (int)(GraphTraceLen / 2); i++){
b915fda3	385	if (GraphBuffer[i] > 1 \|\| GraphBuffer[i] < 0) {
7fe9b0b7	386	CmdBitstream(str);
	387	break;
	388	}
	389	}
	390	}
	391
	392	int CmdLFSim(const char *Cmd)
	393	{
52ab55ab	394	int i,j;
7fe9b0b7	395	static int gap;
	396
	397	sscanf(Cmd, "%i", &gap);
	398
	399	/* convert to bitstream if necessary */
	400	ChkBitstream(Cmd);
	401
52ab55ab	402	printf("Sending [%d bytes]", GraphTraceLen);
52ab55ab	403	for (i = 0; i < GraphTraceLen; i += USB_CMD_DATA_SIZE) {
7fe9b0b7	404	UsbCommand c={CMD_DOWNLOADED_SIM_SAMPLES_125K, {i, 0, 0}};
52ab55ab	405
52ab55ab	406	for (j = 0; j < USB_CMD_DATA_SIZE; j++) {
7fe9b0b7	407	c.d.asBytes[j] = GraphBuffer[i+j];
	408	}
	409	SendCommand(&c);
902cb3c0	410	WaitForResponse(CMD_ACK,NULL);
52ab55ab	411	printf(".");
7fe9b0b7	412	}
7fe9b0b7	413
52ab55ab	414	printf("\n");
52ab55ab	415	PrintAndLog("Starting to simulate");
7fe9b0b7	416	UsbCommand c = {CMD_SIMULATE_TAG_125K, {GraphTraceLen, gap, 0}};
	417	SendCommand(&c);
	418	return 0;
	419	}
	420
	421	int CmdLFSimBidir(const char *Cmd)
	422	{
3fe4ff4f	423	// Set ADC to twice the carrier for a slight supersampling
	424	// HACK: not implemented in ARMSRC.
	425	PrintAndLog("Not implemented yet.");
7fe9b0b7	426	UsbCommand c = {CMD_LF_SIMULATE_BIDIR, {47, 384, 0}};
	427	SendCommand(&c);
	428	return 0;
	429	}
	430
	431	/* simulate an LF Manchester encoded tag with specified bitstream, clock rate and inter-id gap */
	432	int CmdLFSimManchester(const char *Cmd)
	433	{
	434	static int clock, gap;
	435	static char data[1024], gapstring[8];
	436
7fe9b0b7	437	sscanf(Cmd, "%i %s %i", &clock, &data[0], &gap);
7fe9b0b7	438
7fe9b0b7	439	ClearGraph(0);
7fe9b0b7	440
7fe9b0b7	441	for (int i = 0; i < strlen(data) ; ++i)
	442	AppendGraph(0, clock, data[i]- '0');
	443
7fe9b0b7	444	CmdManchesterMod("");
7fe9b0b7	445
7fe9b0b7	446	RepaintGraphWindow();
7fe9b0b7	447
7fe9b0b7	448	sprintf(&gapstring[0], "%i", gap);
	449	CmdLFSim(gapstring);
	450	return 0;
	451	}
	452
b014c96d	453	int CmdLFSnoop(const char *Cmd)
	454	{
	455	UsbCommand c = {CMD_LF_SNOOP_RAW_ADC_SAMPLES};
3fe4ff4f	456
b014c96d	457	// 'h' means higher-low-frequency, 134 kHz
	458	c.arg[0] = 0;
	459	c.arg[1] = -1;
3fe4ff4f	460
3fe4ff4f	461	if (*Cmd == 'l') {
b014c96d	462	sscanf(Cmd, "l %"lli, &c.arg[1]);
	463	} else if(*Cmd == 'h') {
	464	c.arg[0] = 1;
	465	sscanf(Cmd, "h %"lli, &c.arg[1]);
	466	} else if (sscanf(Cmd, "%"lli" %"lli, &c.arg[0], &c.arg[1]) < 1) {
3fe4ff4f	467	PrintAndLog("usage 1: snoop");
	468	PrintAndLog(" 2: snoop {l,h} [trigger threshold]");
	469	PrintAndLog(" 3: snoop <divisor> [trigger threshold]");
b014c96d	470	return 0;
b014c96d	471	}
3fe4ff4f	472
b014c96d	473	SendCommand(&c);
	474	WaitForResponse(CMD_ACK,NULL);
	475	return 0;
	476	}
	477
7fe9b0b7	478	int CmdVchDemod(const char *Cmd)
	479	{
	480	// Is this the entire sync pattern, or does this also include some
	481	// data bits that happen to be the same everywhere? That would be
	482	// lovely to know.
	483	static const int SyncPattern[] = {
	484	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
	485	1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	486	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
	487	1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	488	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
	489	1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	490	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
	491	1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	492	1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
	493	1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
	494	};
	495
	496	// So first, we correlate for the sync pattern, and mark that.
	497	int bestCorrel = 0, bestPos = 0;
	498	int i;
	499	// It does us no good to find the sync pattern, with fewer than
	500	// 2048 samples after it...
	501	for (i = 0; i < (GraphTraceLen-2048); i++) {
	502	int sum = 0;
	503	int j;
	504	for (j = 0; j < arraylen(SyncPattern); j++) {
	505	sum += GraphBuffer[i+j]*SyncPattern[j];
	506	}
	507	if (sum > bestCorrel) {
	508	bestCorrel = sum;
	509	bestPos = i;
	510	}
	511	}
	512	PrintAndLog("best sync at %d [metric %d]", bestPos, bestCorrel);
	513
	514	char bits[257];
	515	bits[256] = '\0';
	516
	517	int worst = INT_MAX;
fddf220a	518	int worstPos = 0;
7fe9b0b7	519
	520	for (i = 0; i < 2048; i += 8) {
	521	int sum = 0;
	522	int j;
	523	for (j = 0; j < 8; j++) {
	524	sum += GraphBuffer[bestPos+i+j];
	525	}
	526	if (sum < 0) {
	527	bits[i/8] = '.';
	528	} else {
	529	bits[i/8] = '1';
	530	}
	531	if(abs(sum) < worst) {
	532	worst = abs(sum);
	533	worstPos = i;
	534	}
	535	}
	536	PrintAndLog("bits:");
	537	PrintAndLog("%s", bits);
	538	PrintAndLog("worst metric: %d at pos %d", worst, worstPos);
	539
	540	if (strcmp(Cmd, "clone")==0) {
	541	GraphTraceLen = 0;
	542	char *s;
	543	for(s = bits; *s; s++) {
	544	int j;
	545	for(j = 0; j < 16; j++) {
	546	GraphBuffer[GraphTraceLen++] = (*s == '1') ? 1 : 0;
	547	}
	548	}
	549	RepaintGraphWindow();
	550	}
	551	return 0;
	552	}
	553
d5a72d2f	554	//by marshmellow
	555	int CmdLFfind(const char *Cmd)
	556	{
	557	int ans=0;
b915fda3	558	char cmdp = param_getchar(Cmd, 0);
	559
	560	if (strlen(Cmd) > 1 \|\| cmdp == 'h' \|\| cmdp == 'H') {
	561	PrintAndLog("Usage: lf search <0\|1>");
	562	PrintAndLog(" <use data from Graphbuffer>, if not set, try reading data from tag.");
	563	PrintAndLog("");
	564	PrintAndLog(" sample: lf search");
	565	PrintAndLog(" : lf search 1");
	566	return 0;
	567	}
	568
84871873	569	if (!offline && (cmdp != '1')){
d5a72d2f	570	ans=CmdLFRead("");
84871873	571	ans=CmdSamples("20000");
b915fda3	572	} else if (GraphTraceLen < 1000) {
	573	PrintAndLog("Data in Graphbuffer was too small.");
	574	return 0;
d5a72d2f	575	}
b915fda3	576
84871873	577	PrintAndLog("NOTE: some demods output possible binary\n if it finds something that looks like a tag");
d5a72d2f	578	PrintAndLog("Checking for known tags:");
d5a72d2f	579	ans=CmdFSKdemodIO("");
84871873	580	if (ans>0) {
	581	PrintAndLog("Valid IO Prox ID Found!");
	582	return 1;
	583	}
	584	ans=CmdFSKdemodHID("");
	585	if (ans>0) {
	586	PrintAndLog("Valid HID Prox ID Found!");
	587	return 1;
	588	}
d5a72d2f	589	//add psk and indala
84871873	590	ans=CmdIndalaDecode("0");
	591	if (ans>0) {
	592	PrintAndLog("Valid Indala ID Found!");
	593	return 1;
	594	}
	595	ans=Cmdaskmandemod("");
	596	if (ans>0) {
	597	PrintAndLog("Valid EM410x ID Found!");
	598	return 1;
	599	}
d5a72d2f	600	PrintAndLog("No Known Tags Found!\n");
	601	return 0;
	602	}
	603
7fe9b0b7	604	static command_t CommandTable[] =
	605	{
	606	{"help", CmdHelp, 1, "This help"},
	607	{"cmdread", CmdLFCommandRead, 0, "<off period> <'0' period> <'1' period> <command> ['h'] -- Modulate LF reader field to send command before read (all periods in microseconds) (option 'h' for 134)"},
37239a7c	608	{"em4x", CmdLFEM4X, 1, "{ EM4X RFIDs... }"},
7fe9b0b7	609	{"flexdemod", CmdFlexdemod, 1, "Demodulate samples for FlexPass"},
37239a7c	610	{"hid", CmdLFHID, 1, "{ HID RFIDs... }"},
083ca3de	611	{"io", CmdLFIO, 1, "{ ioProx tags... }"},
7fe9b0b7	612	{"indalademod", CmdIndalaDemod, 1, "['224'] -- Demodulate samples for Indala 64 bit UID (option '224' for 224 bit)"},
083ca3de	613	{"indalaclone", CmdIndalaClone, 0, "<UID> ['l']-- Clone Indala to T55x7 (tag must be in antenna)(UID in HEX)(option 'l' for 224 UID"},
57c69556	614	{"read", CmdLFRead, 0, "['h' or <divisor>] -- Read 125/134 kHz LF ID-only tag (option 'h' for 134, alternatively: f=12MHz/(divisor+1))"},
d5a72d2f	615	{"search", CmdLFfind, 1, "Read and Search for valid known tag (in offline mode it you can load first then search)"},
7fe9b0b7	616	{"sim", CmdLFSim, 0, "[GAP] -- Simulate LF tag from buffer with optional GAP (in microseconds)"},
	617	{"simbidir", CmdLFSimBidir, 0, "Simulate LF tag (with bidirectional data transmission between reader and tag)"},
	618	{"simman", CmdLFSimManchester, 0, "<Clock> <Bitstream> [GAP] Simulate arbitrary Manchester LF tag"},
b014c96d	619	{"snoop", CmdLFSnoop, 0, "['l'\|'h'\|<divisor>] [trigger threshold]-- Snoop LF (l:125khz, h:134khz)"},
37239a7c	620	{"ti", CmdLFTI, 1, "{ TI RFIDs... }"},
db09cb3a	621	{"hitag", CmdLFHitag, 1, "{ Hitag tags and transponders... }"},
7fe9b0b7	622	{"vchdemod", CmdVchDemod, 1, "['clone'] -- Demodulate samples for VeriChip"},
54a942b0	623	{"t55xx", CmdLFT55XX, 1, "{ T55xx RFIDs... }"},
54a942b0	624	{"pcf7931", CmdLFPCF7931, 1, "{PCF7931 RFIDs...}"},
7fe9b0b7	625	{NULL, NULL, 0, NULL}
	626	};
	627
	628	int CmdLF(const char *Cmd)
	629	{
	630	CmdsParse(CommandTable, Cmd);
	631	return 0;
	632	}
	633
	634	int CmdHelp(const char *Cmd)
	635	{
	636	CmdsHelp(CommandTable);
	637	return 0;
	638	}