FIX: Added @marshmellow42 's fix for ASK/Biphase simulation on deviceside.

[proxmark3-svn] / client / cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index 0ba04b794218b068daf347fd3c445c3c135ae504..967fa28f2655e02aeb19b9994b81f730062cf42f 100644 (file)
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -20,471 +20,2036 @@
 #include "util.h"
 #include "cmdmain.h"
 #include "cmddata.h"
 #include "util.h"
 #include "cmdmain.h"
 #include "cmddata.h"

+#include "lfdemod.h"
+#include "usb_cmd.h"
+#include "crc.h"
+#include "crc16.h"
+#include "loclass/cipherutils.h"
+
+uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
+uint8_t g_debugMode=0;
+size_t DemodBufferLen=0;
+static int CmdHelp(const char *Cmd);

 
 

+//set the demod buffer with given array of binary (one bit per byte)
+//by marshmellow
+void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
+{
+       if (buff == NULL) 
+               return;

 
 

-static int CmdHelp(const char *Cmd);
+       if ( size >= MAX_DEMOD_BUF_LEN)
+               size = MAX_DEMOD_BUF_LEN;

 
 

-int CmdAmp(const char *Cmd)
-{
-  int i, rising, falling;
-  int max = INT_MIN, min = INT_MAX;
-
-  for (i = 10; i < GraphTraceLen; ++i) {
-    if (GraphBuffer[i] > max)
-      max = GraphBuffer[i];
-    if (GraphBuffer[i] < min)
-      min = GraphBuffer[i];
-  }
-
-  if (max != min) {
-    rising = falling= 0;
-    for (i = 0; i < GraphTraceLen; ++i) {
-      if (GraphBuffer[i + 1] < GraphBuffer[i]) {
-        if (rising) {
-          GraphBuffer[i] = max;
-          rising = 0;
-        }
-        falling = 1;
-      }
-      if (GraphBuffer[i + 1] > GraphBuffer[i]) {
-        if (falling) {
-          GraphBuffer[i] = min;
-          falling = 0;
-        }
-        rising= 1;
-      }
-    }
-  }
-  RepaintGraphWindow();
-  return 0;
+       size_t i = 0;
+       for (; i < size; i++){
+               DemodBuffer[i]=buff[startIdx++];
+       }
+       DemodBufferLen=size;
+       return;

 }
 
 }
 

-/*
- * Generic command to demodulate ASK.
- *
- * Argument is convention: positive or negative (High mod means zero
- * or high mod means one)
- *
- * Updates the Graph trace with 0/1 values
- *
- * Arguments:
- * c : 0 or 1
- */
-int Cmdaskdemod(const char *Cmd)
-{
-  int i;
-  int c, high = 0, low = 0;
-
-  sscanf(Cmd, "%i", &c);
-
-  if (c != 0 && c != 1) {
-    PrintAndLog("Invalid argument: %s", Cmd);
-    return 0;
-  }
-  
-  /* Detect high and lows */
-  for (i = 0; i < GraphTraceLen; ++i)
-  {
-    if (GraphBuffer[i] > high)
-      high = GraphBuffer[i];
-    else if (GraphBuffer[i] < low)
-      low = GraphBuffer[i];
-  }
-  
-  if (GraphBuffer[0] > 0) {
-    GraphBuffer[0] = 1-c;
-  } else {
-    GraphBuffer[0] = c;
-  }
-  for (i = 1; i < GraphTraceLen; ++i) {
-    /* Transitions are detected at each peak
-     * Transitions are either:
-     * - we're low: transition if we hit a high
-     * - we're high: transition if we hit a low
-     * (we need to do it this way because some tags keep high or
-     * low for long periods, others just reach the peak and go
-     * down)
-     */
-    if ((GraphBuffer[i] == high) && (GraphBuffer[i - 1] == c)) {
-      GraphBuffer[i] = 1 - c;
-    } else if ((GraphBuffer[i] == low) && (GraphBuffer[i - 1] == (1 - c))){
-      GraphBuffer[i] = c;
-    } else {
-      /* No transition */
-      GraphBuffer[i] = GraphBuffer[i - 1];
-    }
-  }
-  RepaintGraphWindow();
-  return 0;
+int CmdSetDebugMode(const char *Cmd)
+{
+       int demod=0;
+       sscanf(Cmd, "%i", &demod);
+       g_debugMode=(uint8_t)demod;
+       return 1;

 }
 
 }
 

-int CmdAutoCorr(const char *Cmd)
+int usage_data_printdemodbuf(){
+               PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
+       PrintAndLog("Options:");
+       PrintAndLog("       h          This help");
+       PrintAndLog("       x          output in hex (omit for binary output)");
+       PrintAndLog("       o <offset> enter offset in # of bits");
+               PrintAndLog("       l <length> enter length to print in # of bits or hex characters respectively");
+       return 0;       
+}
+
+//by marshmellow
+void printDemodBuff(void)

 {
 {

-  static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
+       int bitLen = DemodBufferLen;
+       if (bitLen<1) {
+               PrintAndLog("no bits found in demod buffer");
+               return;
+       }
+       if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty

 
 

-  int window = atoi(Cmd);
+       char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
+       PrintAndLog("%s",bin);

 
 

-  if (window == 0) {
-    PrintAndLog("needs a window");
-    return 0;
-  }
-  if (window >= GraphTraceLen) {
-    PrintAndLog("window must be smaller than trace (%d samples)",
-      GraphTraceLen);
-    return 0;
-  }
+       return;
+}

 
 

-  PrintAndLog("performing %d correlations", GraphTraceLen - window);
+int CmdPrintDemodBuff(const char *Cmd)
+{
+       char hex[512]={0x00};
+       bool hexMode = false;
+       bool errors = false;
+       uint32_t offset = 0; //could be size_t but no param_get16...
+       uint32_t length = 512;
+       char cmdp = 0;
+       while(param_getchar(Cmd, cmdp) != 0x00)
+       {
+               switch(param_getchar(Cmd, cmdp))
+               {
+               case 'h':
+               case 'H':
+                       return usage_data_printdemodbuf();
+               case 'x':
+               case 'X':
+                       hexMode = true;
+                       cmdp++;
+                       break;
+               case 'o':
+               case 'O':
+                       offset = param_get32ex(Cmd, cmdp+1, 0, 10);
+                       if (!offset) errors = true;
+                       cmdp += 2;
+                       break;
+               case 'l':
+               case 'L':
+                       length = param_get32ex(Cmd, cmdp+1, 512, 10);
+                       if (!length) errors = true;
+                       cmdp += 2;
+                       break;
+               default:
+                       PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+                       errors = true;
+                       break;
+               }
+               if(errors) break;
+       }
+       //Validations
+       if(errors) return usage_data_printdemodbuf();
+       length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length; 
+       int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
+
+       if (hexMode){
+               char *buf = (char *) (DemodBuffer + offset);
+               numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
+               numBits = binarraytohex(hex, buf, numBits);
+               if (numBits==0) return 0;
+               PrintAndLog("DemodBuffer: %s",hex);             
+       } else {
+               PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
+       }
+       return 1;
+}

 
 

-  for (int i = 0; i < GraphTraceLen - window; ++i) {
-    int sum = 0;
-    for (int j = 0; j < window; ++j) {
-      sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
-    }
-    CorrelBuffer[i] = sum;
-  }
-  GraphTraceLen = GraphTraceLen - window;
-  memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
+//by marshmellow
+//this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
+int CmdGetBitStream(const char *Cmd)
+{
+       int i;
+       CmdHpf(Cmd);
+       for (i = 0; i < GraphTraceLen; i++) {
+               if (GraphBuffer[i] >= 1) {
+                       GraphBuffer[i] = 1;
+               } else {
+                       GraphBuffer[i] = 0;
+               }
+       }
+       RepaintGraphWindow();
+       return 0;
+}

 
 

-  RepaintGraphWindow();
-  return 0;
+//by marshmellow
+//print 64 bit EM410x ID in multiple formats
+void printEM410x(uint32_t hi, uint64_t id)
+{
+       if (id || hi){
+               uint64_t iii=1;
+               uint64_t id2lo=0;
+               uint32_t ii=0;
+               uint32_t i=0;
+               for (ii=5; ii>0;ii--){
+                       for (i=0;i<8;i++){
+                               id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
+                       }
+               }
+               if (hi){
+                       //output 88 bit em id
+                       PrintAndLog("\nEM TAG ID      : %06X%016llX", hi, id);
+               } else{
+                       //output 40 bit em id
+                       PrintAndLog("\nEM TAG ID      : %010llX", id);
+                       PrintAndLog("Unique TAG ID  : %010llX",  id2lo);
+                       PrintAndLog("\nPossible de-scramble patterns");
+                       PrintAndLog("HoneyWell IdentKey {");
+                       PrintAndLog("DEZ 8          : %08lld",id & 0xFFFFFF);
+                       PrintAndLog("DEZ 10         : %010lld",id & 0xFFFFFFFF);
+                       PrintAndLog("DEZ 5.5        : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
+                       PrintAndLog("DEZ 3.5A       : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
+                       PrintAndLog("DEZ 3.5B       : %03lld.%05lld",(id & 0xFF000000) >> 24,(id & 0xFFFF));
+                       PrintAndLog("DEZ 3.5C       : %03lld.%05lld",(id & 0xFF0000) >> 16,(id & 0xFFFF));
+                       PrintAndLog("DEZ 14/IK2     : %014lld",id);
+                       PrintAndLog("DEZ 15/IK3     : %015lld",id2lo);
+                       PrintAndLog("DEZ 20/ZK      : %02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld%02lld",
+                           (id2lo & 0xf000000000) >> 36,
+                           (id2lo & 0x0f00000000) >> 32,
+                           (id2lo & 0x00f0000000) >> 28,
+                           (id2lo & 0x000f000000) >> 24,
+                           (id2lo & 0x0000f00000) >> 20,
+                           (id2lo & 0x00000f0000) >> 16,
+                           (id2lo & 0x000000f000) >> 12,
+                           (id2lo & 0x0000000f00) >> 8,
+                           (id2lo & 0x00000000f0) >> 4,
+                           (id2lo & 0x000000000f)
+                       );
+                       uint64_t paxton = (((id>>32) << 24) | (id & 0xffffff))  + 0x143e00;
+                       PrintAndLog("}\nOther          : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));  
+                       PrintAndLog("Pattern Paxton : %lld [0x%llX]", paxton, paxton);
+
+                       uint32_t p1id = (id & 0xFFFFFF);
+                       uint8_t arr[32] = {0x00};
+                       int i =0; 
+                       int j = 23;
+                       for (; i < 24; ++i, --j ){
+                               arr[i] = (p1id >> i) & 1;
+                       }
+
+                       uint32_t p1  = 0;
+
+                       p1 |= arr[23] << 21;
+                       p1 |= arr[22] << 23;
+                       p1 |= arr[21] << 20;
+                       p1 |= arr[20] << 22;
+                               
+                       p1 |= arr[19] << 18;
+                       p1 |= arr[18] << 16;
+                       p1 |= arr[17] << 19;
+                       p1 |= arr[16] << 17;
+                               
+                       p1 |= arr[15] << 13;
+                       p1 |= arr[14] << 15;
+                       p1 |= arr[13] << 12;
+                       p1 |= arr[12] << 14;
+
+                       p1 |= arr[11] << 6;
+                       p1 |= arr[10] << 2;
+                       p1 |= arr[9]  << 7;
+                       p1 |= arr[8]  << 1;
+
+                       p1 |= arr[7]  << 0;
+                       p1 |= arr[6]  << 8;
+                       p1 |= arr[5]  << 11;
+                       p1 |= arr[4]  << 3;
+
+                       p1 |= arr[3]  << 10;
+                       p1 |= arr[2]  << 4;
+                       p1 |= arr[1]  << 5;
+                       p1 |= arr[0]  << 9;
+                       PrintAndLog("Pattern 1      : %d [0x%X]", p1, p1);
+
+                       uint16_t sebury1 = id & 0xFFFF;
+                       uint8_t  sebury2 = (id >> 16) & 0x7F;
+                       uint32_t sebury3 = id & 0x7FFFFF;
+                       PrintAndLog("Pattern Sebury : %d %d %d  [0x%X 0x%X 0x%X]", sebury1, sebury2, sebury3, sebury1, sebury2, sebury3);
+               }
+       }
+       return;

 }
 
 }
 

-int CmdBitsamples(const char *Cmd)
+int AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )

 {
 {

-  int cnt = 0;
-  uint8_t got[12288];
-  
-  GetFromBigBuf(got,sizeof(got),0);
-  WaitForResponse(CMD_ACK,NULL);
-
-    for (int j = 0; j < sizeof(got); j++) {
-      for (int k = 0; k < 8; k++) {
-        if(got[j] & (1 << (7 - k))) {
-          GraphBuffer[cnt++] = 1;
-        } else {
-          GraphBuffer[cnt++] = 0;
-        }
-      }
-  }
-  GraphTraceLen = cnt;
-  RepaintGraphWindow();
-  return 0;
+       size_t idx = 0;
+       size_t BitLen = DemodBufferLen;
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       memcpy(BitStream, DemodBuffer, BitLen); 
+       if (Em410xDecode(BitStream, &BitLen, &idx, hi, lo)){
+               //set GraphBuffer for clone or sim command
+               setDemodBuf(BitStream, BitLen, idx);
+               if (g_debugMode){
+                       PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
+                       printDemodBuff();
+               }
+               if (verbose){
+                       PrintAndLog("EM410x pattern found: ");
+                       printEM410x(*hi, *lo);
+               }
+               return 1;
+       }
+       return 0;

 }
 
 }
 

-/*
- * Convert to a bitstream
- */
-int CmdBitstream(const char *Cmd)
-{
-  int i, j;
-  int bit;
-  int gtl;
-  int clock;
-  int low = 0;
-  int high = 0;
-  int hithigh, hitlow, first;
-
-  /* Detect high and lows and clock */
-  for (i = 0; i < GraphTraceLen; ++i)
-  {
-    if (GraphBuffer[i] > high)
-      high = GraphBuffer[i];
-    else if (GraphBuffer[i] < low)
-      low = GraphBuffer[i];
-  }
-
-  /* Get our clock */
-  clock = GetClock(Cmd, high, 1);
-  gtl = ClearGraph(0);
-
-  bit = 0;
-  for (i = 0; i < (int)(gtl / clock); ++i)
-  {
-    hithigh = 0;
-    hitlow = 0;
-    first = 1;
-    /* Find out if we hit both high and low peaks */
-    for (j = 0; j < clock; ++j)
-    {
-      if (GraphBuffer[(i * clock) + j] == high)
-        hithigh = 1;
-      else if (GraphBuffer[(i * clock) + j] == low)
-        hitlow = 1;
-      /* it doesn't count if it's the first part of our read
-         because it's really just trailing from the last sequence */
-      if (first && (hithigh || hitlow))
-        hithigh = hitlow = 0;
-      else
-        first = 0;
-
-      if (hithigh && hitlow)
-        break;
-    }
+int AskEm410xDemod(const char *Cmd, uint32_t *hi, uint64_t *lo, bool verbose)
+{
+       bool st = TRUE;
+       if (!ASKDemod_ext(Cmd, FALSE, FALSE, 1, &st)) return 0;
+       return AskEm410xDecode(verbose, hi, lo);
+}

 
 

-    /* If we didn't hit both high and low peaks, we had a bit transition */
-    if (!hithigh || !hitlow)
-      bit ^= 1;
+//by marshmellow
+//takes 3 arguments - clock, invert and maxErr as integers
+//attempts to demodulate ask while decoding manchester
+//prints binary found and saves in graphbuffer for further commands
+int CmdAskEM410xDemod(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data askem410xdemod [clock] <0|1> [maxError]");
+               PrintAndLog("     [set clock as integer] optional, if not set, autodetect.");
+               PrintAndLog("     <invert>, 1 for invert output");
+               PrintAndLog("     [set maximum allowed errors], default = 100.");
+               PrintAndLog("");
+               PrintAndLog("    sample: data askem410xdemod        = demod an EM410x Tag ID from GraphBuffer");
+               PrintAndLog("          : data askem410xdemod 32     = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32");
+               PrintAndLog("          : data askem410xdemod 32 1   = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32 and inverting data");
+               PrintAndLog("          : data askem410xdemod 1      = demod an EM410x Tag ID from GraphBuffer while inverting data");
+               PrintAndLog("          : data askem410xdemod 64 1 0 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/64 and inverting data and allowing 0 demod errors");
+               return 0;
+       }
+       uint64_t lo = 0;
+       uint32_t hi = 0;
+       return AskEm410xDemod(Cmd, &hi, &lo, true);
+}

 
 

-    AppendGraph(0, clock, bit);
-//    for (j = 0; j < (int)(clock/2); j++)
-//      GraphBuffer[(i * clock) + j] = bit ^ 1;
-//    for (j = (int)(clock/2); j < clock; j++)
-//      GraphBuffer[(i * clock) + j] = bit;
-  }
+//by marshmellow
+//Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
+//   (amp may not be needed anymore)
+//verbose will print results and demoding messages
+//emSearch will auto search for EM410x format in bitstream
+//askType switches decode: ask/raw = 0, ask/manchester = 1 
+int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
+       int invert=0;
+       int clk=0;
+       int maxErr=100;
+       int maxLen=0;
+       uint8_t askAmp = 0;
+       char amp = param_getchar(Cmd, 0);
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
+       if (!maxLen) maxLen = BIGBUF_SIZE;
+       if (invert != 0 && invert != 1) {
+               PrintAndLog("Invalid argument: %s", Cmd);
+               return 0;
+       }
+       if (clk==1){
+               invert=1;
+               clk=0;
+       }
+       if (amp == 'a' || amp == 'A') askAmp=1; 
+       size_t BitLen = getFromGraphBuf(BitStream);
+       if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
+       if (BitLen<255) return 0;
+       if (maxLen<BitLen && maxLen != 0) BitLen = maxLen;
+       int foundclk = 0;
+       bool st = false;
+       if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
+       if (st) {
+               *stCheck = st;
+               clk = (clk == 0) ? foundclk : clk;
+               if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator");
+       }
+       int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp, askType);
+       if (errCnt<0 || BitLen<16){  //if fatal error (or -1)
+               if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
+               return 0;
+       }
+       if (errCnt>maxErr){
+               if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
+               return 0;
+       }
+       if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
+
+       //output
+       setDemodBuf(BitStream,BitLen,0);
+       if (verbose || g_debugMode){
+               if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
+               if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
+               else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
+               // Now output the bitstream to the scrollback by line of 16 bits
+               printDemodBuff();
+               
+       }
+       uint64_t lo = 0;
+       uint32_t hi = 0;
+       if (emSearch){
+               AskEm410xDecode(true, &hi, &lo);
+       }
+       return 1;
+}
+int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
+       bool st = false;
+       return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
+}

 
 

-  RepaintGraphWindow();
-  return 0;
+//by marshmellow
+//takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
+//attempts to demodulate ask while decoding manchester
+//prints binary found and saves in graphbuffer for further commands
+int Cmdaskmandemod(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
+               PrintAndLog("     ['s'] optional, check for Sequence Terminator");
+               PrintAndLog("     [set clock as integer] optional, if not set, autodetect");
+               PrintAndLog("     <invert>, 1 to invert output");
+               PrintAndLog("     [set maximum allowed errors], default = 100");
+               PrintAndLog("     [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
+               PrintAndLog("     <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod am        = demod an ask/manchester tag from GraphBuffer");
+               PrintAndLog("          : data rawdemod am 32     = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
+               PrintAndLog("          : data rawdemod am 32 1   = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
+               PrintAndLog("          : data rawdemod am 1      = demod an ask/manchester tag from GraphBuffer while inverting data");
+               PrintAndLog("          : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+               return 0;
+       }
+       bool st = TRUE;
+       if (Cmd[0]=='s') 
+               return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
+       else if (Cmd[1] == 's')
+               return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
+       else
+       return ASKDemod(Cmd, TRUE, TRUE, 1);
+}
+
+//by marshmellow
+//manchester decode
+//stricktly take 10 and 01 and convert to 0 and 1
+int Cmdmandecoderaw(const char *Cmd)
+{
+       int i =0;
+       int errCnt=0;
+       size_t size=0;
+       int invert=0;
+       int maxErr = 20;
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data manrawdecode [invert] [maxErr]");
+               PrintAndLog("     Takes 10 and 01 and converts to 0 and 1 respectively");
+               PrintAndLog("     --must have binary sequence in demodbuffer (run data askrawdemod first)");
+               PrintAndLog("  [invert]  invert output");               
+               PrintAndLog("  [maxErr]  set number of errors allowed (default = 20)");         
+               PrintAndLog("");
+               PrintAndLog("    sample: data manrawdecode   = decode manchester bitstream from the demodbuffer");
+               return 0;
+       }
+       if (DemodBufferLen==0) return 0;
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       int high=0,low=0;
+       for (;i<DemodBufferLen;++i){
+               if (DemodBuffer[i]>high) high=DemodBuffer[i];
+               else if(DemodBuffer[i]<low) low=DemodBuffer[i];
+               BitStream[i]=DemodBuffer[i];
+       }
+       if (high>7 || low <0 ){
+               PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
+               return 0;
+       }
+
+       sscanf(Cmd, "%i %i", &invert, &maxErr);
+       size=i;
+       errCnt=manrawdecode(BitStream, &size, invert);
+       if (errCnt>=maxErr){
+               PrintAndLog("Too many errors: %d",errCnt);
+               return 0;
+       }
+       PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
+       PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
+       if (errCnt==0){
+               uint64_t id = 0;
+               uint32_t hi = 0;
+               size_t idx=0;
+               if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
+                       //need to adjust to set bitstream back to manchester encoded data
+                       //setDemodBuf(BitStream, size, idx);
+
+                       printEM410x(hi, id);
+               }
+       }
+       return 1;
+}
+
+//by marshmellow
+//biphase decode
+//take 01 or 10 = 0 and 11 or 00 = 1
+//takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
+// and "invert" default = 0 if 1 it will invert output
+//  the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
+int CmdBiphaseDecodeRaw(const char *Cmd)
+{
+       size_t size=0;
+       int offset=0, invert=0, maxErr=20, errCnt=0;
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data biphaserawdecode [offset] [invert] [maxErr]");
+               PrintAndLog("     Converts 10 or 01 to 1 and 11 or 00 to 0");
+               PrintAndLog("     --must have binary sequence in demodbuffer (run data askrawdemod first)");
+               PrintAndLog("     --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
+               PrintAndLog("");
+               PrintAndLog("     [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
+               PrintAndLog("     [invert <0|1>], set to 1 to invert output");
+               PrintAndLog("     [maxErr int],   set max errors tolerated - default=20");
+               PrintAndLog("");
+               PrintAndLog("    sample: data biphaserawdecode     = decode biphase bitstream from the demodbuffer");
+               PrintAndLog("    sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
+               return 0;
+       }
+       sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
+       if (DemodBufferLen==0){
+               PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
+               return 0;
+       }
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       memcpy(BitStream, DemodBuffer, DemodBufferLen); 
+       size = DemodBufferLen;
+       errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
+       if (errCnt<0){
+               PrintAndLog("Error during decode:%d", errCnt);
+               return 0;
+       }
+       if (errCnt>maxErr){
+               PrintAndLog("Too many errors attempting to decode: %d",errCnt);
+               return 0;
+       }
+
+       if (errCnt>0){
+               PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
+       }
+       PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
+       PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
+       
+       if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset);  //remove first bit from raw demod
+       return 1;
+}
+
+//by marshmellow
+// - ASK Demod then Biphase decode GraphBuffer samples
+int ASKbiphaseDemod(const char *Cmd, bool verbose)
+{
+       //ask raw demod GraphBuffer first
+       int offset=0, clk=0, invert=0, maxErr=0;
+       sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
+       
+       uint8_t BitStream[MAX_DEMOD_BUF_LEN];
+       size_t size = getFromGraphBuf(BitStream);         
+       //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
+       int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);  
+       if ( errCnt < 0 || errCnt > maxErr ) {   
+               if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);  
+                       return 0;  
+       } 
+
+       //attempt to Biphase decode BitStream
+       errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
+       if (errCnt < 0){
+               if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
+               return 0;
+       } 
+       if (errCnt > maxErr) {
+               if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
+               return 0;
+       }
+       //success set DemodBuffer and return
+       setDemodBuf(BitStream, size, 0);
+       if (g_debugMode || verbose){
+               PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
+               printDemodBuff();
+       }
+       return 1;
+}
+//by marshmellow - see ASKbiphaseDemod
+int Cmdaskbiphdemod(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
+               PrintAndLog("     [offset], offset to begin biphase, default=0");
+               PrintAndLog("     [set clock as integer] optional, if not set, autodetect");
+               PrintAndLog("     <invert>, 1 to invert output");
+               PrintAndLog("     [set maximum allowed errors], default = 100");
+               PrintAndLog("     [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
+               PrintAndLog("     <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
+               PrintAndLog("     NOTE: <invert>  can be entered as second or third argument");
+               PrintAndLog("     NOTE: <amplify> can be entered as first, second or last argument");
+               PrintAndLog("     NOTE: any other arg must have previous args set to work");
+               PrintAndLog("");
+               PrintAndLog("     NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod ab              = demod an ask/biph tag from GraphBuffer");
+               PrintAndLog("          : data rawdemod ab 0 a          = demod an ask/biph tag from GraphBuffer, amplified");
+               PrintAndLog("          : data rawdemod ab 1 32         = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
+               PrintAndLog("          : data rawdemod ab 0 32 1       = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
+               PrintAndLog("          : data rawdemod ab 0 1          = demod an ask/biph tag from GraphBuffer while inverting data");
+               PrintAndLog("          : data rawdemod ab 0 64 1 0     = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+               PrintAndLog("          : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
+               return 0;
+       }
+       return ASKbiphaseDemod(Cmd, TRUE);
+}
+
+//by marshmellow
+//attempts to demodulate and identify a G_Prox_II verex/chubb card
+//WARNING: if it fails during some points it will destroy the DemodBuffer data
+// but will leave the GraphBuffer intact.
+//if successful it will push askraw data back to demod buffer ready for emulation
+int CmdG_Prox_II_Demod(const char *Cmd)
+{
+       if (!ASKbiphaseDemod(Cmd, FALSE)){
+               if (g_debugMode) PrintAndLog("Error gProxII: ASKbiphaseDemod failed 1st try");
+               return 0;
+       }
+       size_t size = DemodBufferLen;
+       //call lfdemod.c demod for gProxII
+       int ans = gProxII_Demod(DemodBuffer, &size);
+       if (ans < 0){
+               if (g_debugMode) PrintAndLog("Error gProxII_Demod");
+               return 0;
+       }
+       //got a good demod of 96 bits
+       uint8_t ByteStream[8] = {0x00};
+       uint8_t xorKey=0;
+       size_t startIdx = ans + 6; //start after 6 bit preamble
+
+       uint8_t bits_no_spacer[90];
+       //so as to not mess with raw DemodBuffer copy to a new sample array
+       memcpy(bits_no_spacer, DemodBuffer + startIdx, 90);
+       // remove the 18 (90/5=18) parity bits (down to 72 bits (96-6-18=72))
+       size_t bitLen = removeParity(bits_no_spacer, 0, 5, 3, 90); //source, startloc, paritylen, ptype, length_to_run
+       if (bitLen != 72) {
+               if (g_debugMode) PrintAndLog("Error gProxII: spacer removal did not produce 72 bits: %u, start: %u", bitLen, startIdx);
+                               return 0;
+                       }
+       // get key and then get all 8 bytes of payload decoded
+       xorKey = (uint8_t)bytebits_to_byteLSBF(bits_no_spacer, 8);
+       for (size_t idx = 0; idx < 8; idx++) {
+               ByteStream[idx] = ((uint8_t)bytebits_to_byteLSBF(bits_no_spacer+8 + (idx*8),8)) ^ xorKey;
+               if (g_debugMode) PrintAndLog("byte %u after xor: %02x", (unsigned int)idx, ByteStream[idx]);
+       }
+       //now ByteStream contains 8 Bytes (64 bits) of decrypted raw tag data
+       // 
+       uint8_t fmtLen = ByteStream[0]>>2;
+       uint32_t FC = 0;
+       uint32_t Card = 0;
+       //get raw 96 bits to print
+       uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans,32);
+       uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
+       uint32_t raw3 = bytebits_to_byte(DemodBuffer+ans+64, 32);
+
+       if (fmtLen==36){
+               FC = ((ByteStream[3] & 0x7F)<<7) | (ByteStream[4]>>1);
+               Card = ((ByteStream[4]&1)<<19) | (ByteStream[5]<<11) | (ByteStream[6]<<3) | (ByteStream[7]>>5);
+               PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
+       } else if(fmtLen==26){
+               FC = ((ByteStream[3] & 0x7F)<<1) | (ByteStream[4]>>7);
+               Card = ((ByteStream[4]&0x7F)<<9) | (ByteStream[5]<<1) | (ByteStream[6]>>7);
+               PrintAndLog("G-Prox-II Found: FmtLen %d, FC %u, Card %u", (int)fmtLen, FC, Card);
+       } else {
+               PrintAndLog("Unknown G-Prox-II Fmt Found: FmtLen %d",(int)fmtLen);
+               PrintAndLog("Decoded Raw: %s", sprint_hex(ByteStream, 8)); 
+       }
+       PrintAndLog("Raw: %08x%08x%08x", raw1,raw2,raw3);
+       setDemodBuf(DemodBuffer+ans, 96, 0);
+       return 1;
+}
+
+//by marshmellow
+//see ASKDemod for what args are accepted
+int CmdVikingDemod(const char *Cmd)
+{
+       if (!ASKDemod(Cmd, false, false, 1)) {
+               if (g_debugMode) PrintAndLog("ASKDemod failed");
+               return 0;
+       }
+       size_t size = DemodBufferLen;
+       //call lfdemod.c demod for Viking
+       int ans = VikingDemod_AM(DemodBuffer, &size);
+       if (ans < 0) {
+               if (g_debugMode) PrintAndLog("Error Viking_Demod %d", ans);
+               return 0;
+       }
+       //got a good demod
+       uint32_t raw1 = bytebits_to_byte(DemodBuffer+ans, 32);
+       uint32_t raw2 = bytebits_to_byte(DemodBuffer+ans+32, 32);
+       uint32_t cardid = bytebits_to_byte(DemodBuffer+ans+24, 32);
+       uint8_t  checksum = bytebits_to_byte(DemodBuffer+ans+32+24, 8);
+       PrintAndLog("Viking Tag Found: Card ID %08X, Checksum: %02X", cardid, checksum);
+       PrintAndLog("Raw: %08X%08X", raw1,raw2);
+       setDemodBuf(DemodBuffer+ans, 64, 0);
+       return 1;
+}
+
+//by marshmellow - see ASKDemod
+int Cmdaskrawdemod(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
+               PrintAndLog("     [set clock as integer] optional, if not set, autodetect");
+               PrintAndLog("     <invert>, 1 to invert output");
+               PrintAndLog("     [set maximum allowed errors], default = 100");
+               PrintAndLog("     [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
+               PrintAndLog("     <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod ar            = demod an ask tag from GraphBuffer");
+               PrintAndLog("          : data rawdemod ar a          = demod an ask tag from GraphBuffer, amplified");
+               PrintAndLog("          : data rawdemod ar 32         = demod an ask tag from GraphBuffer using a clock of RF/32");
+               PrintAndLog("          : data rawdemod ar 32 1       = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
+               PrintAndLog("          : data rawdemod ar 1          = demod an ask tag from GraphBuffer while inverting data");
+               PrintAndLog("          : data rawdemod ar 64 1 0     = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+               PrintAndLog("          : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
+               return 0;
+       }
+       return ASKDemod(Cmd, TRUE, FALSE, 0);
+}
+
+int AutoCorrelate(int window, bool SaveGrph, bool verbose)
+{
+       static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
+       size_t Correlation = 0;
+       int maxSum = 0;
+       int lastMax = 0;
+       if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
+       for (int i = 0; i < GraphTraceLen - window; ++i) {
+               int sum = 0;
+               for (int j = 0; j < window; ++j) {
+                       sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
+               }
+               CorrelBuffer[i] = sum;
+               if (sum >= maxSum-100 && sum <= maxSum+100){
+                       //another max
+                       Correlation = i-lastMax;
+                       lastMax = i;
+                       if (sum > maxSum) maxSum = sum;
+               } else if (sum > maxSum){
+                       maxSum=sum;
+                       lastMax = i;
+               }
+       }
+       if (Correlation==0){
+               //try again with wider margin
+               for (int i = 0; i < GraphTraceLen - window; i++){
+                       if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
+                               //another max
+                               Correlation = i-lastMax;
+                               lastMax = i;
+                               //if (CorrelBuffer[i] > maxSum) maxSum = sum;
+                       }
+               }
+       }
+       if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
+
+       if (SaveGrph){
+               GraphTraceLen = GraphTraceLen - window;
+               memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
+               RepaintGraphWindow();  
+       }
+       return Correlation;
+}
+
+int usage_data_autocorr(void)
+{
+       //print help
+       PrintAndLog("Usage: data autocorr [window] [g]");
+       PrintAndLog("Options:        ");
+       PrintAndLog("       h              This help");
+       PrintAndLog("       [window]       window length for correlation - default = 4000");
+       PrintAndLog("       g              save back to GraphBuffer (overwrite)");
+       return 0;
+}
+
+int CmdAutoCorr(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       if (cmdp == 'h' || cmdp == 'H') 
+               return usage_data_autocorr();
+       int window = 4000; //set default
+       char grph=0;
+       bool updateGrph = FALSE;
+       sscanf(Cmd, "%i %c", &window, &grph);
+
+       if (window >= GraphTraceLen) {
+               PrintAndLog("window must be smaller than trace (%d samples)",
+                       GraphTraceLen);
+               return 0;
+       }
+       if (grph == 'g') updateGrph=TRUE;
+       return AutoCorrelate(window, updateGrph, TRUE);
+}
+
+int CmdBitsamples(const char *Cmd)
+{
+       int cnt = 0;
+       uint8_t got[12288];
+
+       GetFromBigBuf(got,sizeof(got),0);
+       WaitForResponse(CMD_ACK,NULL);
+
+               for (int j = 0; j < sizeof(got); j++) {
+                       for (int k = 0; k < 8; k++) {
+                               if(got[j] & (1 << (7 - k))) {
+                                       GraphBuffer[cnt++] = 1;
+                               } else {
+                                       GraphBuffer[cnt++] = 0;
+                               }
+                       }
+       }
+       GraphTraceLen = cnt;
+       RepaintGraphWindow();
+       return 0;

 }
 
 int CmdBuffClear(const char *Cmd)
 {
 }
 
 int CmdBuffClear(const char *Cmd)
 {

-  UsbCommand c = {CMD_BUFF_CLEAR};
-  SendCommand(&c);
-  ClearGraph(true);
-  return 0;
+       UsbCommand c = {CMD_BUFF_CLEAR};
+       SendCommand(&c);
+       ClearGraph(true);
+       return 0;

 }
 
 int CmdDec(const char *Cmd)
 {
 }
 
 int CmdDec(const char *Cmd)
 {

-  for (int i = 0; i < (GraphTraceLen / 2); ++i)
-    GraphBuffer[i] = GraphBuffer[i * 2];
-  GraphTraceLen /= 2;
-  PrintAndLog("decimated by 2");
-  RepaintGraphWindow();
-  return 0;
+       for (int i = 0; i < (GraphTraceLen / 2); ++i)
+               GraphBuffer[i] = GraphBuffer[i * 2];
+       GraphTraceLen /= 2;
+       PrintAndLog("decimated by 2");
+       RepaintGraphWindow();
+       return 0;
+}
+/**
+ * Undecimate - I'd call it 'interpolate', but we'll save that
+ * name until someone does an actual interpolation command, not just
+ * blindly repeating samples
+ * @param Cmd
+ * @return
+ */
+int CmdUndec(const char *Cmd)
+{
+       if(param_getchar(Cmd, 0) == 'h')
+       {
+               PrintAndLog("Usage: data undec [factor]");
+               PrintAndLog("This function performs un-decimation, by repeating each sample N times");
+               PrintAndLog("Options:        ");
+               PrintAndLog("       h            This help");
+               PrintAndLog("       factor       The number of times to repeat each sample.[default:2]");
+               PrintAndLog("Example: 'data undec 3'");
+               return 0;
+       }
+
+       uint8_t factor = param_get8ex(Cmd, 0, 2, 10);
+       //We have memory, don't we?
+       int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
+       uint32_t g_index = 0 ,s_index = 0;
+       while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
+       {
+               int count = 0;
+               for (count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
+                       swap[s_index+count] = GraphBuffer[g_index];
+               s_index += count;
+               g_index++;
+       }
+
+       memcpy(GraphBuffer, swap, s_index * sizeof(int));
+       GraphTraceLen = s_index;
+       RepaintGraphWindow();
+       return 0;
+}
+
+//by marshmellow
+//shift graph zero up or down based on input + or -
+int CmdGraphShiftZero(const char *Cmd)
+{
+
+       int shift=0;
+       //set options from parameters entered with the command
+       sscanf(Cmd, "%i", &shift);
+       int shiftedVal=0;
+       for(int i = 0; i<GraphTraceLen; i++){
+               shiftedVal=GraphBuffer[i]+shift;
+               if (shiftedVal>127) 
+                       shiftedVal=127;
+               else if (shiftedVal<-127) 
+                       shiftedVal=-127;
+               GraphBuffer[i]= shiftedVal;
+       }
+       CmdNorm("");
+       return 0;
+}
+
+//by marshmellow
+//use large jumps in read samples to identify edges of waves and then amplify that wave to max
+//similar to dirtheshold, threshold commands 
+//takes a threshold length which is the measured length between two samples then determines an edge
+int CmdAskEdgeDetect(const char *Cmd)
+{
+       int thresLen = 25;
+       sscanf(Cmd, "%i", &thresLen); 
+
+       for(int i = 1; i<GraphTraceLen; i++){
+               if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
+                       GraphBuffer[i-1] = 127;
+               else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
+                       GraphBuffer[i-1] = -127;
+       }
+       RepaintGraphWindow();
+       return 0;

 }
 
 /* Print our clock rate */
 }
 
 /* Print our clock rate */

+// uses data from graphbuffer
+// adjusted to take char parameter for type of modulation to find the clock - by marshmellow.

 int CmdDetectClockRate(const char *Cmd)
 {
 int CmdDetectClockRate(const char *Cmd)
 {

-  int clock = DetectClock(0);
-  PrintAndLog("Auto-detected clock rate: %d", clock);
-  return 0;
-}
-
-int CmdFSKdemod(const char *Cmd)
-{
-  static const int LowTone[]  = {
-    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
-  };
-  static const int HighTone[] = {
-    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,
-  };
-
-  int lowLen = sizeof (LowTone) / sizeof (int);
-  int highLen = sizeof (HighTone) / sizeof (int);
-  int convLen = (highLen > lowLen) ? highLen : lowLen;
-  uint32_t hi = 0, lo = 0;
-
-  int i, j;
-  int minMark = 0, maxMark = 0;
-
-  for (i = 0; i < GraphTraceLen - convLen; ++i) {
-    int lowSum = 0, highSum = 0;
-
-    for (j = 0; j < lowLen; ++j) {
-      lowSum += LowTone[j]*GraphBuffer[i+j];
-    }
-    for (j = 0; j < highLen; ++j) {
-      highSum += HighTone[j] * GraphBuffer[i + j];
-    }
-    lowSum = abs(100 * lowSum / lowLen);
-    highSum = abs(100 * highSum / highLen);
-    GraphBuffer[i] = (highSum << 16) | lowSum;
-  }
-
-  for(i = 0; i < GraphTraceLen - convLen - 16; ++i) {
-    int lowTot = 0, highTot = 0;
-    // 10 and 8 are f_s divided by f_l and f_h, rounded
-    for (j = 0; j < 10; ++j) {
-      lowTot += (GraphBuffer[i+j] & 0xffff);
-    }
-    for (j = 0; j < 8; j++) {
-      highTot += (GraphBuffer[i + j] >> 16);
-    }
-    GraphBuffer[i] = lowTot - highTot;
-    if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i];
-    if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i];
-  }
-
-  GraphTraceLen -= (convLen + 16);
-  RepaintGraphWindow();
-
-  // Find bit-sync (3 lo followed by 3 high)
-  int max = 0, maxPos = 0;
-  for (i = 0; i < 6000; ++i) {
-    int dec = 0;
-    for (j = 0; j < 3 * lowLen; ++j) {
-      dec -= GraphBuffer[i + j];
-    }
-    for (; j < 3 * (lowLen + highLen ); ++j) {
-      dec += GraphBuffer[i + j];
-    }
-    if (dec > max) {
-      max = dec;
-      maxPos = i;
-    }
-  }
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data detectclock [modulation] <clock>");
+               PrintAndLog("     [modulation as char], specify the modulation type you want to detect the clock of");
+               PrintAndLog("     <clock>             , specify the clock (optional - to get best start position only)");
+               PrintAndLog("       'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
+               PrintAndLog("");
+               PrintAndLog("    sample: data detectclock a    = detect the clock of an ask modulated wave in the GraphBuffer");
+               PrintAndLog("            data detectclock f    = detect the clock of an fsk modulated wave in the GraphBuffer");
+               PrintAndLog("            data detectclock p    = detect the clock of an psk modulated wave in the GraphBuffer");
+               PrintAndLog("            data detectclock n    = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
+       }
+       int ans=0;
+       if (cmdp == 'a'){
+               ans = GetAskClock(Cmd+1, true, false);
+       } else if (cmdp == 'f'){
+               ans = GetFskClock("", true, false);
+       } else if (cmdp == 'n'){
+               ans = GetNrzClock("", true, false);
+       } else if (cmdp == 'p'){
+               ans = GetPskClock("", true, false);
+       } else {
+               PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
+       }
+       return ans;
+}

 
 

-  // place start of bit sync marker in graph
-  GraphBuffer[maxPos] = maxMark;
-  GraphBuffer[maxPos + 1] = minMark;
+char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
+{
+       static char fType[8];
+       memset(fType, 0x00, 8); 
+       char *fskType = fType;
+       if (fchigh==10 && fclow==8){
+               if (invert) //fsk2a
+                       memcpy(fskType, "FSK2a", 5);
+               else //fsk2
+                       memcpy(fskType, "FSK2", 4);
+       } else if (fchigh == 8 && fclow == 5) {
+               if (invert)
+                       memcpy(fskType, "FSK1", 4);
+               else
+                       memcpy(fskType, "FSK1a", 5);
+       } else {
+               memcpy(fskType, "FSK??", 5);
+       }
+       return fskType;
+}

 
 

-  maxPos += j;
+//by marshmellow
+//fsk raw demod and print binary
+//takes 4 arguments - Clock, invert, fchigh, fclow
+//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
+int FSKrawDemod(const char *Cmd, bool verbose)
+{
+       //raw fsk demod  no manchester decoding no start bit finding just get binary from wave
+       uint8_t rfLen, invert, fchigh, fclow;
+
+       //set defaults
+       //set options from parameters entered with the command
+       rfLen = param_get8(Cmd, 0);
+       invert = param_get8(Cmd, 1);
+       fchigh = param_get8(Cmd, 2);
+       fclow = param_get8(Cmd, 3);
+       if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
+               if (rfLen==1) {
+                       invert = 1;   //if invert option only is used
+                       rfLen = 0;
+               }
+       }

 
 

-  // place end of bit sync marker in graph
-  GraphBuffer[maxPos] = maxMark;
-  GraphBuffer[maxPos+1] = minMark;
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t BitLen = getFromGraphBuf(BitStream);
+       if (BitLen==0) return 0;
+       //get field clock lengths
+       uint16_t fcs=0;
+       if (!fchigh || !fclow) {
+               fcs = countFC(BitStream, BitLen, 1);
+               if (!fcs) {
+                       fchigh = 10;
+                       fclow = 8;
+               } else {
+                       fchigh = (fcs >> 8) & 0x00FF;
+                       fclow = fcs & 0x00FF;
+               }
+       }
+       //get bit clock length
+       if (!rfLen) {
+               rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
+               if (!rfLen) rfLen = 50;
+       }
+       int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
+       if (size > 0) {
+               setDemodBuf(BitStream, size, 0);
+
+               // Now output the bitstream to the scrollback by line of 16 bits
+               if (verbose || g_debugMode) {
+                       PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen,  (unsigned int)invert,  (unsigned int)fchigh,  (unsigned int)fclow);
+                       PrintAndLog("%s decoded bitstream:", GetFSKType(fchigh, fclow, invert));
+                       printDemodBuff();
+               }

 
 

-  PrintAndLog("actual data bits start at sample %d", maxPos);
-  PrintAndLog("length %d/%d", highLen, lowLen);
+               return 1;
+       } else {
+               if (g_debugMode) PrintAndLog("no FSK data found");
+       }
+       return 0;
+}

 
 

-  uint8_t bits[46];
-  bits[sizeof(bits)-1] = '\0';
+//by marshmellow
+//fsk raw demod and print binary
+//takes 4 arguments - Clock, invert, fchigh, fclow
+//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
+int CmdFSKrawdemod(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data rawdemod fs [clock] <invert> [fchigh] [fclow]");
+               PrintAndLog("     [set clock as integer] optional, omit for autodetect.");
+               PrintAndLog("     <invert>, 1 for invert output, can be used even if the clock is omitted");
+               PrintAndLog("     [fchigh], larger field clock length, omit for autodetect");
+               PrintAndLog("     [fclow], small field clock length, omit for autodetect");
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod fs           = demod an fsk tag from GraphBuffer using autodetect");
+               PrintAndLog("          : data rawdemod fs 32        = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
+               PrintAndLog("          : data rawdemod fs 1         = demod an fsk tag from GraphBuffer using autodetect, invert output");   
+               PrintAndLog("          : data rawdemod fs 32 1      = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
+               PrintAndLog("          : data rawdemod fs 64 0 8 5  = demod an fsk1 RF/64 tag from GraphBuffer");
+               PrintAndLog("          : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
+               PrintAndLog("          : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
+               return 0;
+       }
+       return FSKrawDemod(Cmd, TRUE);
+}

 
 

-  // find bit pairs and manchester decode them
-  for (i = 0; i < arraylen(bits) - 1; ++i) {
-    int dec = 0;
-    for (j = 0; j < lowLen; ++j) {
-      dec -= GraphBuffer[maxPos + j];
-    }
-    for (; j < lowLen + highLen; ++j) {
-      dec += GraphBuffer[maxPos + j];
-    }
-    maxPos += j;
-    // place inter bit marker in graph
-    GraphBuffer[maxPos] = maxMark;
-    GraphBuffer[maxPos + 1] = minMark;
-
-    // hi and lo form a 64 bit pair
-    hi = (hi << 1) | (lo >> 31);
-    lo = (lo << 1);
-    // store decoded bit as binary (in hi/lo) and text (in bits[])
-    if(dec < 0) {
-      bits[i] = '1';
-      lo |= 1;
-    } else {
-      bits[i] = '0';
-    }
-  }
-  PrintAndLog("bits: '%s'", bits);
-  PrintAndLog("hex: %08x %08x", hi, lo);
-  return 0;
+//by marshmellow (based on existing demod + holiman's refactor)
+//HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
+//print full HID Prox ID and some bit format details if found
+int CmdFSKdemodHID(const char *Cmd)
+{
+       //raw fsk demod no manchester decoding no start bit finding just get binary from wave
+       uint32_t hi2=0, hi=0, lo=0;
+
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t BitLen = getFromGraphBuf(BitStream);
+       if (BitLen==0) return 0;
+       //get binary from fsk wave
+       int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
+       if (idx<0){
+               if (g_debugMode){
+                       if (idx==-1){
+                               PrintAndLog("DEBUG: Just Noise Detected");
+                       } else if (idx == -2) {
+                               PrintAndLog("DEBUG: Error demoding fsk");
+                       } else if (idx == -3) {
+                               PrintAndLog("DEBUG: Preamble not found");
+                       } else if (idx == -4) {
+                               PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
+                       } else {
+                               PrintAndLog("DEBUG: Error demoding fsk %d", idx);
+                       }   
+               }
+               return 0;
+       }
+       if (hi2==0 && hi==0 && lo==0) {
+               if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
+               return 0;
+       }
+       if (hi2 != 0){ //extra large HID tags
+               PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
+                        (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
+       }
+       else {  //standard HID tags <38 bits
+               uint8_t fmtLen = 0;
+               uint32_t fc = 0;
+               uint32_t cardnum = 0;
+               if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
+                       uint32_t lo2=0;
+                       lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
+                       uint8_t idx3 = 1;
+                       while(lo2>1){ //find last bit set to 1 (format len bit)
+                               lo2=lo2>>1;
+                               idx3++;
+                       }
+                       fmtLen =idx3+19;
+                       fc =0;
+                       cardnum=0;
+                       if(fmtLen==26){
+                               cardnum = (lo>>1)&0xFFFF;
+                               fc = (lo>>17)&0xFF;
+                       }
+                       if(fmtLen==34){
+                               cardnum = (lo>>1)&0xFFFF;
+                               fc= ((hi&1)<<15)|(lo>>17);
+                       }
+                       if(fmtLen==35){
+                               cardnum = (lo>>1)&0xFFFFF;
+                               fc = ((hi&1)<<11)|(lo>>21);
+                       }
+               }
+               else { //if bit 38 is not set then 37 bit format is used
+                       fmtLen = 37;
+                       fc = 0;
+                       cardnum = 0;
+                       if(fmtLen == 37){
+                               cardnum = (lo>>1)&0x7FFFF;
+                               fc = ((hi&0xF)<<12)|(lo>>20);
+                       }
+               }
+               PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
+                       (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
+                       (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
+       }
+       setDemodBuf(BitStream,BitLen,idx);
+       if (g_debugMode){ 
+               PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
+               printDemodBuff();
+       }
+       return 1;
+}
+
+//by marshmellow
+//Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
+//print full Paradox Prox ID and some bit format details if found
+int CmdFSKdemodParadox(const char *Cmd)
+{
+       //raw fsk demod no manchester decoding no start bit finding just get binary from wave
+       uint32_t hi2=0, hi=0, lo=0;
+
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t BitLen = getFromGraphBuf(BitStream);
+       if (BitLen==0) return 0;
+       //get binary from fsk wave
+       int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
+       if (idx<0){
+               if (g_debugMode){
+                       if (idx==-1){
+                               PrintAndLog("DEBUG: Just Noise Detected");     
+                       } else if (idx == -2) {
+                               PrintAndLog("DEBUG: Error demoding fsk");
+                       } else if (idx == -3) {
+                               PrintAndLog("DEBUG: Preamble not found");
+                       } else if (idx == -4) {
+                               PrintAndLog("DEBUG: Error in Manchester data");
+                       } else {
+                               PrintAndLog("DEBUG: Error demoding fsk %d", idx);
+                       }
+               }
+               return 0;
+       }
+       if (hi2==0 && hi==0 && lo==0){
+               if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
+               return 0;
+       }
+       uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
+       uint32_t cardnum = (lo>>10)&0xFFFF;
+       uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
+       uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
+       uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
+
+       PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
+               hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
+       setDemodBuf(BitStream,BitLen,idx);
+       if (g_debugMode){ 
+               PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
+               printDemodBuff();
+       }
+       return 1;
+}
+
+//by marshmellow
+//IO-Prox demod - FSK RF/64 with preamble of 000000001
+//print ioprox ID and some format details
+int CmdFSKdemodIO(const char *Cmd)
+{
+       int idx=0;
+       //something in graphbuffer?
+       if (GraphTraceLen < 65) {
+               if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
+               return 0;
+       }
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t BitLen = getFromGraphBuf(BitStream);
+       if (BitLen==0) return 0;
+
+       //get binary from fsk wave
+       idx = IOdemodFSK(BitStream,BitLen);
+       if (idx<0){
+               if (g_debugMode){
+                       if (idx==-1){
+                               PrintAndLog("DEBUG: Just Noise Detected");     
+                       } else if (idx == -2) {
+                               PrintAndLog("DEBUG: not enough samples");
+                       } else if (idx == -3) {
+                               PrintAndLog("DEBUG: error during fskdemod");        
+                       } else if (idx == -4) {
+                               PrintAndLog("DEBUG: Preamble not found");
+                       } else if (idx == -5) {
+                               PrintAndLog("DEBUG: Separator bits not found");
+                       } else {
+                               PrintAndLog("DEBUG: Error demoding fsk %d", idx);
+                       }
+               }
+               return 0;
+       }
+       if (idx==0){
+               if (g_debugMode){
+                       PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
+                       if (BitLen > 92) PrintAndLog("%s", sprint_bin_break(BitStream,92,16));
+               } 
+               return 0;
+       }
+               //Index map
+               //0           10          20          30          40          50          60
+               //|           |           |           |           |           |           |
+               //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
+               //-----------------------------------------------------------------------------
+               //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
+               //
+               //XSF(version)facility:codeone+codetwo (raw)
+               //Handle the data
+       if (idx+64>BitLen) {
+               if (g_debugMode) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
+               return 0;
+       }
+       PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx],    BitStream[idx+1],  BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
+       PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9],  BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
+       PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
+       PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
+       PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
+       PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
+       PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
+
+       uint32_t code = bytebits_to_byte(BitStream+idx,32);
+       uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
+       uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
+       uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
+       uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
+       uint8_t crc = bytebits_to_byte(BitStream+idx+54,8);
+       uint16_t calccrc = 0;
+
+       for (uint8_t i=1; i<6; ++i){
+               calccrc += bytebits_to_byte(BitStream+idx+9*i,8);
+       }
+       calccrc &= 0xff;
+       calccrc = 0xff - calccrc;
+
+       char *crcStr = (crc == calccrc) ? "crc ok": "!crc";
+
+       PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x) [%02x %s]",version,facilitycode,number,code,code2, crc, crcStr);
+       setDemodBuf(BitStream,64,idx);
+       if (g_debugMode){
+               PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
+               printDemodBuff();
+       }
+       return 1;
+}
+
+//by marshmellow
+//AWID Prox demod - FSK RF/50 with preamble of 00000001  (always a 96 bit data stream)
+//print full AWID Prox ID and some bit format details if found
+int CmdFSKdemodAWID(const char *Cmd)
+{
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t size = getFromGraphBuf(BitStream);
+       if (size==0) return 0;
+
+       //get binary from fsk wave
+       int idx = AWIDdemodFSK(BitStream, &size);
+       if (idx<=0){
+               if (g_debugMode==1){
+                       if (idx == -1)
+                               PrintAndLog("DEBUG: Error - not enough samples");
+                       else if (idx == -2)
+                               PrintAndLog("DEBUG: Error - only noise found");
+                       else if (idx == -3)
+                               PrintAndLog("DEBUG: Error - problem during FSK demod");
+                       else if (idx == -4)
+                               PrintAndLog("DEBUG: Error - AWID preamble not found");
+                       else if (idx == -5)
+                               PrintAndLog("DEBUG: Error - Size not correct: %d", size);
+                       else
+                               PrintAndLog("DEBUG: Error %d",idx);
+               }
+               return 0;
+       }
+
+       // Index map
+       // 0            10            20            30              40            50              60
+       // |            |             |             |               |             |               |
+       // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
+       // -----------------------------------------------------------------------------
+       // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
+       // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
+       //          |---26 bit---|    |-----117----||-------------142-------------|
+       // b = format bit len, o = odd parity of last 3 bits
+       // f = facility code, c = card number
+       // w = wiegand parity
+       // (26 bit format shown)
+ 
+       //get raw ID before removing parities
+       uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
+       uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
+       uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
+       setDemodBuf(BitStream,96,idx);
+
+       size = removeParity(BitStream, idx+8, 4, 1, 88);
+       if (size != 66){
+               if (g_debugMode==1) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
+               return 0;
+       }
+       // ok valid card found!
+
+       // Index map
+       // 0           10         20        30          40        50        60
+       // |           |          |         |           |         |         |
+       // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
+       // -----------------------------------------------------------------------------
+       // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
+       // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+       // |26 bit|   |-117--| |-----142------|
+       // b = format bit len, o = odd parity of last 3 bits
+       // f = facility code, c = card number
+       // w = wiegand parity
+       // (26 bit format shown)
+
+       uint32_t fc = 0;
+       uint32_t cardnum = 0;
+       uint32_t code1 = 0;
+       uint32_t code2 = 0;
+       uint8_t fmtLen = bytebits_to_byte(BitStream,8);
+       if (fmtLen==26){
+               fc = bytebits_to_byte(BitStream+9, 8);
+               cardnum = bytebits_to_byte(BitStream+17, 16);
+               code1 = bytebits_to_byte(BitStream+8,fmtLen);
+               PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
+       } else {
+               cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
+               if (fmtLen>32){
+                       code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
+                       code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
+                       PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
+               } else{
+                       code1 = bytebits_to_byte(BitStream+8,fmtLen);
+                       PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
+               }
+       }
+       if (g_debugMode){
+               PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
+               printDemodBuff();
+       }
+       //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
+       return 1;
+}
+
+//by marshmellow
+//Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001  (always a 128 bit data stream)
+//print full Farpointe Data/Pyramid Prox ID and some bit format details if found
+int CmdFSKdemodPyramid(const char *Cmd)
+{
+       //raw fsk demod no manchester decoding no start bit finding just get binary from wave
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t size = getFromGraphBuf(BitStream);
+       if (size==0) return 0;
+
+       //get binary from fsk wave
+       int idx = PyramiddemodFSK(BitStream, &size);
+       if (idx < 0){
+               if (g_debugMode==1){
+                       if (idx == -5)
+                               PrintAndLog("DEBUG: Error - not enough samples");
+                       else if (idx == -1)
+                               PrintAndLog("DEBUG: Error - only noise found");
+                       else if (idx == -2)
+                               PrintAndLog("DEBUG: Error - problem during FSK demod");
+                       else if (idx == -3)
+                               PrintAndLog("DEBUG: Error - Size not correct: %d", size);
+                       else if (idx == -4)
+                               PrintAndLog("DEBUG: Error - Pyramid preamble not found");
+                       else
+                               PrintAndLog("DEBUG: Error - idx: %d",idx);
+               }
+               return 0;
+       }
+       // Index map
+       // 0           10          20          30            40          50          60
+       // |           |           |           |             |           |           |
+       // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
+       // -----------------------------------------------------------------------------
+       // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
+       // premable  xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
+
+       // 64    70            80          90          100         110           120
+       // |     |             |           |           |           |             |
+       // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
+       // -----------------------------------------------------------------------------
+       // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
+       // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
+       //                                  |---115---||---------71---------|
+       // s = format start bit, o = odd parity of last 7 bits
+       // f = facility code, c = card number
+       // w = wiegand parity, x = extra space for other formats
+       // p = CRC8maxim checksum
+       // (26 bit format shown)
+
+       //get bytes for checksum calc
+       uint8_t checksum = bytebits_to_byte(BitStream + idx + 120, 8);
+       uint8_t csBuff[14] = {0x00};
+       for (uint8_t i = 0; i < 13; i++){
+               csBuff[i] = bytebits_to_byte(BitStream + idx + 16 + (i*8), 8);
+       }
+       //check checksum calc
+       //checksum calc thanks to ICEMAN!!
+       uint32_t checkCS =  CRC8Maxim(csBuff,13);
+
+       //get raw ID before removing parities
+       uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
+       uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
+       uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
+       uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
+       setDemodBuf(BitStream,128,idx);
+
+       size = removeParity(BitStream, idx+8, 8, 1, 120);
+       if (size != 105){
+               if (g_debugMode==1) 
+                       PrintAndLog("DEBUG: Error at parity check - tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
+               return 0;
+       }
+
+       // ok valid card found!
+
+       // Index map
+       // 0         10        20        30        40        50        60        70
+       // |         |         |         |         |         |         |         |
+       // 01234567890123456789012345678901234567890123456789012345678901234567890
+       // -----------------------------------------------------------------------
+       // 00000000000000000000000000000000000000000000000000000000000000000000000
+       // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+
+       // 71         80         90          100
+       // |          |          |           |
+       // 1 2 34567890 1234567890123456 7 8901234
+       // ---------------------------------------
+       // 1 1 01110011 0000000001000110 0 1001010
+       // s w ffffffff cccccccccccccccc w ppppppp
+       //     |--115-| |------71------|
+       // s = format start bit, o = odd parity of last 7 bits
+       // f = facility code, c = card number
+       // w = wiegand parity, x = extra space for other formats
+       // p = CRC8-Maxim checksum
+       // (26 bit format shown)
+
+       //find start bit to get fmtLen
+       int j;
+       for (j=0; j < size; ++j){
+               if(BitStream[j]) break;
+       }
+       
+       uint8_t fmtLen = size-j-8;
+       uint32_t fc = 0;
+       uint32_t cardnum = 0;
+       uint32_t code1 = 0;
+       
+       if ( fmtLen == 26 ){
+               fc = bytebits_to_byte(BitStream+73, 8);
+               cardnum = bytebits_to_byte(BitStream+81, 16);
+               code1 = bytebits_to_byte(BitStream+72,fmtLen);
+               PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
+       } else if (fmtLen == 45) {
+               fmtLen = 42; //end = 10 bits not 7 like 26 bit fmt
+               fc = bytebits_to_byte(BitStream+53, 10);
+               cardnum = bytebits_to_byte(BitStream+63, 32);
+               PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
+       } else {
+               cardnum = bytebits_to_byte(BitStream+81, 16);
+               PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
+       }
+       if (checksum == checkCS)
+               PrintAndLog("Checksum %02x passed", checksum);
+       else
+               PrintAndLog("Checksum %02x failed - should have been %02x", checksum, checkCS);
+
+       if (g_debugMode){
+               PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
+               printDemodBuff();
+       }
+       return 1;
+}
+
+// FDX-B ISO11784/85 demod  (aka animal tag)  BIPHASE, inverted, rf/32,  with preamble of 00000000001 (128bits)
+// 8 databits + 1 parity (1)
+// CIITT 16 chksum
+// NATIONAL CODE, ICAR database
+// COUNTRY CODE (ISO3166) or http://cms.abvma.ca/uploads/ManufacturersISOsandCountryCodes.pdf
+// FLAG (animal/non-animal)
+/*
+38 IDbits   
+10 country code 
+1 extra app bit
+14 reserved bits
+1 animal bit
+16 ccitt CRC chksum over 64bit ID CODE.
+24 appli bits.
+
+-- sample: 985121004515220  [ 37FF65B88EF94 ]
+*/
+int CmdFDXBdemodBI(const char *Cmd){
+
+       int invert = 1;
+       int clk = 32;           
+       int errCnt = 0;
+       int maxErr = 0;
+       uint8_t BitStream[MAX_DEMOD_BUF_LEN];   
+       size_t size = getFromGraphBuf(BitStream);       
+       
+       errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
+       if ( errCnt < 0 || errCnt > maxErr ) { 
+               if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
+               return 0;
+       }
+
+       errCnt = BiphaseRawDecode(BitStream, &size, maxErr, 1);
+       if (errCnt < 0 || errCnt > maxErr ) {
+               if (g_debugMode) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
+               return 0;
+       } 
+       
+       int preambleIndex = FDXBdemodBI(BitStream, &size);
+       if (preambleIndex < 0){
+               if (g_debugMode) PrintAndLog("Error FDXBDemod , no startmarker found :: %d",preambleIndex);
+               return 0;
+       }
+       if (size != 128) {
+               if (g_debugMode) PrintAndLog("Error incorrect data length found");
+               return 0;
+       }
+       
+       setDemodBuf(BitStream, 128, preambleIndex);
+
+       // remove marker bits (1's every 9th digit after preamble) (pType = 2)
+       size = removeParity(BitStream, preambleIndex + 11, 9, 2, 117);
+       if ( size != 104 ) {
+               if (g_debugMode) PrintAndLog("Error removeParity:: %d", size);
+               return 0;
+       }
+       if (g_debugMode) {
+               char *bin = sprint_bin_break(BitStream,size,16);
+               PrintAndLog("DEBUG BinStream:\n%s",bin);
+       }
+       PrintAndLog("\nFDX-B / ISO 11784/5 Animal Tag ID Found:");
+       if (g_debugMode) PrintAndLog("Start marker %d;   Size %d", preambleIndex, size);
+
+       //got a good demod
+       uint64_t NationalCode = ((uint64_t)(bytebits_to_byteLSBF(BitStream+32,6)) << 32) | bytebits_to_byteLSBF(BitStream,32);
+       uint32_t countryCode = bytebits_to_byteLSBF(BitStream+38,10);
+       uint8_t dataBlockBit = BitStream[48];
+       uint32_t reservedCode = bytebits_to_byteLSBF(BitStream+49,14);
+       uint8_t animalBit = BitStream[63];
+       uint32_t crc16 = bytebits_to_byteLSBF(BitStream+64,16);
+       uint32_t extended = bytebits_to_byteLSBF(BitStream+80,24);
+
+       uint64_t rawid = ((uint64_t)bytebits_to_byte(BitStream,32)<<32) | bytebits_to_byte(BitStream+32,32);
+       uint8_t raw[8];
+       num_to_bytes(rawid, 8, raw);
+
+       if (g_debugMode) PrintAndLog("Raw ID Hex: %s", sprint_hex(raw,8));
+
+       uint16_t calcCrc = crc16_ccitt_kermit(raw, 8);
+       PrintAndLog("Animal ID:     %04u-%012llu", countryCode, NationalCode);
+       PrintAndLog("National Code: %012llu", NationalCode);
+       PrintAndLog("CountryCode:   %04u", countryCode);
+       PrintAndLog("Extended Data: %s", dataBlockBit ? "True" : "False");
+       PrintAndLog("reserved Code: %u", reservedCode);
+       PrintAndLog("Animal Tag:    %s", animalBit ? "True" : "False");
+       PrintAndLog("CRC:           0x%04X - [%04X] - %s", crc16, calcCrc, (calcCrc == crc16) ? "Passed" : "Failed");
+       PrintAndLog("Extended:      0x%X\n", extended);
+       
+       return 1;
+}
+
+
+//by marshmellow
+//attempt to psk1 demod graph buffer
+int PSKDemod(const char *Cmd, bool verbose)
+{
+       int invert=0;
+       int clk=0;
+       int maxErr=100;
+       sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
+       if (clk==1){
+               invert=1;
+               clk=0;
+       }
+       if (invert != 0 && invert != 1) {
+               if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
+               return 0;
+       }
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t BitLen = getFromGraphBuf(BitStream);
+       if (BitLen==0) return 0;
+       uint8_t carrier=countFC(BitStream, BitLen, 0);
+       if (carrier!=2 && carrier!=4 && carrier!=8){
+               //invalid carrier
+               return 0;
+       }
+       if (g_debugMode){
+               PrintAndLog("Carrier: rf/%d",carrier);
+       }
+       int errCnt=0;
+       errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
+       if (errCnt > maxErr){
+               if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+               return 0;
+       } 
+       if (errCnt<0|| BitLen<16){  //throw away static - allow 1 and -1 (in case of threshold command first)
+               if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+               return 0;
+       }
+       if (verbose || g_debugMode){
+               PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
+               if (errCnt>0){
+                       PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
+               }
+       }
+       //prime demod buffer for output
+       setDemodBuf(BitStream,BitLen,0);
+       return 1;
+}
+
+// Indala 26 bit decode
+// by marshmellow
+// optional arguments - same as CmdpskNRZrawDemod (clock & invert)
+int CmdIndalaDecode(const char *Cmd)
+{
+       int ans;
+       if (strlen(Cmd)>0){
+               ans = PSKDemod(Cmd, 0);
+       } else{ //default to RF/32
+               ans = PSKDemod("32", 0);
+       }
+
+       if (!ans){
+               if (g_debugMode==1) 
+                       PrintAndLog("Error1: %d",ans);
+               return 0;
+       }
+       uint8_t invert=0;
+       size_t size = DemodBufferLen;
+       size_t startIdx = indala26decode(DemodBuffer, &size, &invert);
+       if (startIdx < 1 || size > 224) {
+               if (g_debugMode==1)
+                       PrintAndLog("Error2: %d",ans);
+               return -1;
+       }
+       setDemodBuf(DemodBuffer, size, startIdx);
+       if (invert)
+               if (g_debugMode==1)
+                       PrintAndLog("Had to invert bits");
+
+       PrintAndLog("BitLen: %d",DemodBufferLen);
+       //convert UID to HEX
+       uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
+       uid1=bytebits_to_byte(DemodBuffer,32);
+       uid2=bytebits_to_byte(DemodBuffer+32,32);
+       if (DemodBufferLen==64){
+               PrintAndLog("Indala UID=%s (%x%08x)",  sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2);
+       } else {
+               uid3=bytebits_to_byte(DemodBuffer+64,32);
+               uid4=bytebits_to_byte(DemodBuffer+96,32);
+               uid5=bytebits_to_byte(DemodBuffer+128,32);
+               uid6=bytebits_to_byte(DemodBuffer+160,32);
+               uid7=bytebits_to_byte(DemodBuffer+192,32);
+               PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)", 
+                    sprint_bin_break(DemodBuffer,DemodBufferLen,16), uid1, uid2, uid3, uid4, uid5, uid6, uid7);
+       }
+       if (g_debugMode){
+               PrintAndLog("DEBUG: printing demodbuffer:");
+               printDemodBuff();
+       }
+       return 1;
+}
+
+int CmdPSKNexWatch(const char *Cmd)
+{
+       if (!PSKDemod("", false)) return 0;
+       uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+       size_t startIdx = 0, size = DemodBufferLen; 
+       bool invert = false;
+       if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
+               // if didn't find preamble try again inverting
+               if (!PSKDemod("1", false)) return 0; 
+               size = DemodBufferLen;
+               if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
+               invert = true;
+       } 
+       if (size != 128) return 0;
+       setDemodBuf(DemodBuffer, size, startIdx+4);
+       startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
+       //get ID
+       uint32_t ID = 0;
+       for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
+               for (uint8_t idx=0; idx<8; idx++){
+                       ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
+               }       
+       }
+       //parity check (TBD)
+
+       //checksum check (TBD)
+
+       //output
+       PrintAndLog("NexWatch ID: %d", ID);
+       if (invert){
+               PrintAndLog("Had to Invert - probably NexKey");
+               for (uint8_t idx=0; idx<size; idx++)
+                       DemodBuffer[idx] ^= 1;
+       } 
+
+       CmdPrintDemodBuff("x");
+       return 1;
+}
+
+// by marshmellow
+// takes 3 arguments - clock, invert, maxErr as integers
+// attempts to demodulate nrz only
+// prints binary found and saves in demodbuffer for further commands
+int NRZrawDemod(const char *Cmd, bool verbose)
+{
+       int invert=0;
+       int clk=0;
+       int maxErr=100;
+       sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
+       if (clk==1){
+               invert=1;
+               clk=0;
+       }
+       if (invert != 0 && invert != 1) {
+               PrintAndLog("Invalid argument: %s", Cmd);
+               return 0;
+       }
+       uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+       size_t BitLen = getFromGraphBuf(BitStream);
+       if (BitLen==0) return 0;
+       int errCnt=0;
+       errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
+       if (errCnt > maxErr){
+               if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+               return 0;
+       } 
+       if (errCnt<0 || BitLen<16){  //throw away static - allow 1 and -1 (in case of threshold command first)
+               if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
+               return 0;
+       }
+       if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
+       //prime demod buffer for output
+       setDemodBuf(BitStream,BitLen,0);
+
+       if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
+       if (verbose || g_debugMode) {
+               PrintAndLog("NRZ demoded bitstream:");
+               // Now output the bitstream to the scrollback by line of 16 bits
+               printDemodBuff();
+       }
+       return 1; 
+}
+
+int CmdNRZrawDemod(const char *Cmd)
+{
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data rawdemod nr [clock] <0|1> [maxError]");
+               PrintAndLog("     [set clock as integer] optional, if not set, autodetect.");
+               PrintAndLog("     <invert>, 1 for invert output");
+               PrintAndLog("     [set maximum allowed errors], default = 100.");
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod nr        = demod a nrz/direct tag from GraphBuffer");
+               PrintAndLog("          : data rawdemod nr 32     = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
+               PrintAndLog("          : data rawdemod nr 32 1   = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
+               PrintAndLog("          : data rawdemod nr 1      = demod a nrz/direct tag from GraphBuffer while inverting data");
+               PrintAndLog("          : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+               return 0;
+       }
+       return NRZrawDemod(Cmd, TRUE);
+}
+
+// by marshmellow
+// takes 3 arguments - clock, invert, maxErr as integers
+// attempts to demodulate psk only
+// prints binary found and saves in demodbuffer for further commands
+int CmdPSK1rawDemod(const char *Cmd)
+{
+       int ans;
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data rawdemod p1 [clock] <0|1> [maxError]");
+               PrintAndLog("     [set clock as integer] optional, if not set, autodetect.");
+               PrintAndLog("     <invert>, 1 for invert output");
+               PrintAndLog("     [set maximum allowed errors], default = 100.");
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod p1        = demod a psk1 tag from GraphBuffer");
+               PrintAndLog("          : data rawdemod p1 32     = demod a psk1 tag from GraphBuffer using a clock of RF/32");
+               PrintAndLog("          : data rawdemod p1 32 1   = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
+               PrintAndLog("          : data rawdemod p1 1      = demod a psk1 tag from GraphBuffer while inverting data");
+               PrintAndLog("          : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
+               return 0;
+       }
+       ans = PSKDemod(Cmd, TRUE);
+       //output
+       if (!ans){
+               if (g_debugMode) PrintAndLog("Error demoding: %d",ans); 
+               return 0;
+       }
+ 
+       PrintAndLog("PSK1 demoded bitstream:");
+       // Now output the bitstream to the scrollback by line of 16 bits
+       printDemodBuff();
+       return 1;
+}
+
+// by marshmellow
+// takes same args as cmdpsk1rawdemod
+int CmdPSK2rawDemod(const char *Cmd)
+{
+       int ans=0;
+       char cmdp = param_getchar(Cmd, 0);
+       if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
+               PrintAndLog("Usage:  data rawdemod p2 [clock] <0|1> [maxError]");
+               PrintAndLog("     [set clock as integer] optional, if not set, autodetect.");
+               PrintAndLog("     <invert>, 1 for invert output");
+               PrintAndLog("     [set maximum allowed errors], default = 100.");
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod p2         = demod a psk2 tag from GraphBuffer, autodetect clock");
+               PrintAndLog("          : data rawdemod p2 32      = demod a psk2 tag from GraphBuffer using a clock of RF/32");
+               PrintAndLog("          : data rawdemod p2 32 1    = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
+               PrintAndLog("          : data rawdemod p2 1       = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
+               PrintAndLog("          : data rawdemod p2 64 1 0  = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
+               return 0;
+       }
+       ans=PSKDemod(Cmd, TRUE);
+       if (!ans){
+               if (g_debugMode) PrintAndLog("Error demoding: %d",ans);  
+               return 0;
+       } 
+       psk1TOpsk2(DemodBuffer, DemodBufferLen);
+       PrintAndLog("PSK2 demoded bitstream:");
+       // Now output the bitstream to the scrollback by line of 16 bits
+       printDemodBuff();  
+       return 1;
+}
+
+// by marshmellow - combines all raw demod functions into one menu command
+int CmdRawDemod(const char *Cmd)
+{
+       char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
+
+       if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
+               PrintAndLog("Usage:  data rawdemod [modulation] <help>|<options>");
+               PrintAndLog("   [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");           
+               PrintAndLog("         'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
+               PrintAndLog("   <help> as 'h', prints the help for the specific modulation");   
+               PrintAndLog("   <options> see specific modulation help for optional parameters");                               
+               PrintAndLog("");
+               PrintAndLog("    sample: data rawdemod fs h         = print help specific to fsk demod");
+               PrintAndLog("          : data rawdemod fs           = demod GraphBuffer using: fsk - autodetect");
+               PrintAndLog("          : data rawdemod ab           = demod GraphBuffer using: ask/biphase - autodetect");
+               PrintAndLog("          : data rawdemod am           = demod GraphBuffer using: ask/manchester - autodetect");
+               PrintAndLog("          : data rawdemod ar           = demod GraphBuffer using: ask/raw - autodetect");
+               PrintAndLog("          : data rawdemod nr           = demod GraphBuffer using: nrz/direct - autodetect");
+               PrintAndLog("          : data rawdemod p1           = demod GraphBuffer using: psk1 - autodetect");
+               PrintAndLog("          : data rawdemod p2           = demod GraphBuffer using: psk2 - autodetect");
+               return 0;
+       }
+       char cmdp2 = Cmd[1];
+       int ans = 0;
+       if (cmdp == 'f' && cmdp2 == 's'){
+               ans = CmdFSKrawdemod(Cmd+2);
+       } else if(cmdp == 'a' && cmdp2 == 'b'){
+               ans = Cmdaskbiphdemod(Cmd+2);
+       } else if(cmdp == 'a' && cmdp2 == 'm'){
+               ans = Cmdaskmandemod(Cmd+2);
+       } else if(cmdp == 'a' && cmdp2 == 'r'){
+               ans = Cmdaskrawdemod(Cmd+2);
+       } else if(cmdp == 'n' && cmdp2 == 'r'){
+               ans = CmdNRZrawDemod(Cmd+2);
+       } else if(cmdp == 'p' && cmdp2 == '1'){
+               ans = CmdPSK1rawDemod(Cmd+2);
+       } else if(cmdp == 'p' && cmdp2 == '2'){
+               ans = CmdPSK2rawDemod(Cmd+2);
+       } else { 
+               PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
+       }
+       return ans;

 }
 
 int CmdGrid(const char *Cmd)
 {
 }
 
 int CmdGrid(const char *Cmd)
 {

-  sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
-  PlotGridXdefault= PlotGridX;
-  PlotGridYdefault= PlotGridY;
-  RepaintGraphWindow();
-  return 0;
+       sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
+       PlotGridXdefault= PlotGridX;
+       PlotGridYdefault= PlotGridY;
+       RepaintGraphWindow();
+       return 0;

 }
 
 int CmdHexsamples(const char *Cmd)
 {
 }
 
 int CmdHexsamples(const char *Cmd)
 {

-  int i, j;
-  int requested = 0;
-  int offset = 0;
-  char string_buf[25];
-  char* string_ptr = string_buf;
-  uint8_t got[40000];
- 
-  sscanf(Cmd, "%i %i", &requested, &offset);
-
-  /* if no args send something */
-  if (requested == 0) {
-    requested = 8;
-  }
-  if (offset + requested > sizeof(got)) {
-    PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 40000");
-    return 0;
-  } 
-
-  GetFromBigBuf(got,requested,offset);
-  WaitForResponse(CMD_ACK,NULL);
-
-  i = 0;
-  for (j = 0; j < requested; j++) {
-    i++;
-    string_ptr += sprintf(string_ptr, "%02x ", got[j]);
-    if (i == 8) {
-      *(string_ptr - 1) = '\0';    // remove the trailing space
-      PrintAndLog("%s", string_buf);
-      string_buf[0] = '\0';
-      string_ptr = string_buf;
-      i = 0;
-    }
-    if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
-      *(string_ptr - 1) = '\0';
-      PrintAndLog("%s", string_buf);
-      string_buf[0] = '\0';
-    }  
-  }
-  return 0;
+       int i, j;
+       int requested = 0;
+       int offset = 0;
+       char string_buf[25];
+       char* string_ptr = string_buf;
+       uint8_t got[BIGBUF_SIZE];
+
+       sscanf(Cmd, "%i %i", &requested, &offset);
+
+       /* if no args send something */
+       if (requested == 0) {
+               requested = 8;
+       }
+       if (offset + requested > sizeof(got)) {
+               PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
+               return 0;
+       }
+
+       GetFromBigBuf(got,requested,offset);
+       WaitForResponse(CMD_ACK,NULL);
+
+       i = 0;
+       for (j = 0; j < requested; j++) {
+               i++;
+               string_ptr += sprintf(string_ptr, "%02x ", got[j]);
+               if (i == 8) {
+                       *(string_ptr - 1) = '\0';    // remove the trailing space
+                       PrintAndLog("%s", string_buf);
+                       string_buf[0] = '\0';
+                       string_ptr = string_buf;
+                       i = 0;
+               }
+               if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
+                       *(string_ptr - 1) = '\0';
+                       PrintAndLog("%s", string_buf);
+                       string_buf[0] = '\0';
+               }
+       }
+       return 0;

 }
 
 int CmdHide(const char *Cmd)
 {
 }
 
 int CmdHide(const char *Cmd)
 {

-  HideGraphWindow();
-  return 0;
+       HideGraphWindow();
+       return 0;

 }
 
 }
 

+//zero mean GraphBuffer

 int CmdHpf(const char *Cmd)
 {
 int CmdHpf(const char *Cmd)
 {

-  int i;
-  int accum = 0;
+       int i;
+       int accum = 0;

 
 

-  for (i = 10; i < GraphTraceLen; ++i)
-    accum += GraphBuffer[i];
-  accum /= (GraphTraceLen - 10);
-  for (i = 0; i < GraphTraceLen; ++i)
-    GraphBuffer[i] -= accum;
+       for (i = 10; i < GraphTraceLen; ++i)
+               accum += GraphBuffer[i];
+       accum /= (GraphTraceLen - 10);
+       for (i = 0; i < GraphTraceLen; ++i)
+               GraphBuffer[i] -= accum;

 
 

-  RepaintGraphWindow();
-  return 0;
+       RepaintGraphWindow();
+       return 0;

 }
 
 }
 

-int CmdSamples(const char *Cmd)
+bool _headBit( BitstreamOut *stream)

 {
 {

-       uint8_t got[36440] = {0x00};
-       
+       int bytepos = stream->position >> 3; // divide by 8
+       int bitpos = (stream->position++) & 7; // mask out 00000111
+       return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
+}
+
+uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
+{
+       int i;
+       uint8_t val = 0;
+       for(i =0 ; i < bits_per_sample; i++)
+       {
+               val |= (_headBit(b) << (7-i));
+       }
+       return val;
+}
+
+int getSamples(const char *Cmd, bool silent)
+{
+       //If we get all but the last byte in bigbuf,
+       // we don't have to worry about remaining trash
+       // in the last byte in case the bits-per-sample
+       // does not line up on byte boundaries
+
+       uint8_t got[BIGBUF_SIZE-1] = { 0 };
+

        int n = strtol(Cmd, NULL, 0);
        int n = strtol(Cmd, NULL, 0);

-       if (n == 0) 
-               n = 16000;
-       if (n > sizeof(got)) 
+
+       if ( n == 0 || n > sizeof(got))

                n = sizeof(got);
                n = sizeof(got);

-  
-       PrintAndLog("Reading %d samples from device memory\n", n);
-       GetFromBigBuf(got,n,3560);
-       WaitForResponse(CMD_ACK,NULL);
-       for (int j = 0; j < n; ++j) {
-               GraphBuffer[j] = ((int)got[j]) - 128;
+
+       PrintAndLog("Reading %d bytes from device memory\n", n);
+       GetFromBigBuf(got,n,0);
+       PrintAndLog("Data fetched");
+       UsbCommand response;
+       if ( !WaitForResponseTimeout(CMD_ACK, &response, 10000) ) {
+        PrintAndLog("timeout while waiting for reply.");
+               return 1;
+    }
+       
+       uint8_t bits_per_sample = 8;
+
+       //Old devices without this feature would send 0 at arg[0]
+       if(response.arg[0] > 0)
+       {
+               sample_config *sc = (sample_config *) response.d.asBytes;
+               PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample, sc->decimation);
+               bits_per_sample = sc->bits_per_sample;
+       }
+       if(bits_per_sample < 8)
+       {
+               PrintAndLog("Unpacking...");
+               BitstreamOut bout = { got, bits_per_sample * n,  0};
+               int j =0;
+               for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
+                       uint8_t sample = getByte(bits_per_sample, &bout);
+                       GraphBuffer[j] = ((int) sample )- 128;
+               }
+               GraphTraceLen = j;
+               PrintAndLog("Unpacked %d samples" , j );
+       }else
+       {
+               for (int j = 0; j < n; j++) {
+                       GraphBuffer[j] = ((int)got[j]) - 128;
+               }
+               GraphTraceLen = n;

        }
        }

-       GraphTraceLen = n;
+

        RepaintGraphWindow();
        return 0;
 }
        RepaintGraphWindow();
        return 0;
 }

+
+int CmdSamples(const char *Cmd)
+{
+       return getSamples(Cmd, false);
+}
+

 int CmdTuneSamples(const char *Cmd)
 {
        int timeout = 0;
        printf("\nMeasuring antenna characteristics, please wait...");
 
 int CmdTuneSamples(const char *Cmd)
 {
        int timeout = 0;
        printf("\nMeasuring antenna characteristics, please wait...");
 

-       UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING};
+       UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {0,0,0}};
+       clearCommandBuffer();

        SendCommand(&c);
        SendCommand(&c);

-

        UsbCommand resp;
        UsbCommand resp;

-       while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
+       while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING, &resp, 2000)) {

                timeout++;
                printf(".");
                if (timeout > 7) {
                timeout++;
                printf(".");
                if (timeout > 7) {


@@ -505,490 +2070,357 @@ int CmdTuneSamples(const char *Cmd)
        PrintAndLog("# LF antenna: %5.2f V @   134.00 kHz", vLf134/1000.0);
        PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
        PrintAndLog("# HF antenna: %5.2f V @    13.56 MHz", vHf/1000.0);
        PrintAndLog("# LF antenna: %5.2f V @   134.00 kHz", vLf134/1000.0);
        PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
        PrintAndLog("# HF antenna: %5.2f V @    13.56 MHz", vHf/1000.0);

-       if (peakv<2000)
+
+ #define LF_UNUSABLE_V         2948            // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
+ #define LF_MARGINAL_V         14739           // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
+ #define HF_UNUSABLE_V         3167            // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
+ #define HF_MARGINAL_V         7917            // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
+
+       if (peakv < LF_UNUSABLE_V)

                PrintAndLog("# Your LF antenna is unusable.");
                PrintAndLog("# Your LF antenna is unusable.");

-       else if (peakv<10000)
+       else if (peakv < LF_MARGINAL_V)

                PrintAndLog("# Your LF antenna is marginal.");
                PrintAndLog("# Your LF antenna is marginal.");

-       if (vHf<2000)
+       if (vHf < HF_UNUSABLE_V)

                PrintAndLog("# Your HF antenna is unusable.");
                PrintAndLog("# Your HF antenna is unusable.");

-       else if (vHf<5000)
+       else if (vHf < HF_MARGINAL_V)

                PrintAndLog("# Your HF antenna is marginal.");
 
                PrintAndLog("# Your HF antenna is marginal.");
 

-       for (int i = 0; i < 256; i++) {
-               GraphBuffer[i] = resp.d.asBytes[i] - 128;
+       if (peakv >= LF_UNUSABLE_V)     {
+               for (int i = 0; i < 256; i++) {
+                       GraphBuffer[i] = resp.d.asBytes[i] - 128;
+               }
+               PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
+               PrintAndLog("\n");
+               GraphTraceLen = 256;
+               ShowGraphWindow();
+               RepaintGraphWindow();

        }
        }

-  
-       PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n");
-       PrintAndLog("\n");
-       GraphTraceLen = 256;
-       ShowGraphWindow();
-
-  return 0;
+       return 0;

 }
 
 
 int CmdLoad(const char *Cmd)
 {
 }
 
 
 int CmdLoad(const char *Cmd)
 {

-   char filename[FILE_PATH_SIZE] = {0x00};
-   int len = 0;
+       char filename[FILE_PATH_SIZE] = {0x00};
+       int len = 0;

 
 

-   len = strlen(Cmd);
-   if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
-   memcpy(filename, Cmd, len);
+       len = strlen(Cmd);
+       if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
+       memcpy(filename, Cmd, len);

        
        

-   FILE *f = fopen(filename, "r");
-   if (!f) {
-     PrintAndLog("couldn't open '%s'", filename);
-     return 0;
-   }
-
-  GraphTraceLen = 0;
-  char line[80];
-  while (fgets(line, sizeof (line), f)) {
-    GraphBuffer[GraphTraceLen] = atoi(line);
-    GraphTraceLen++;
-  }
-  fclose(f);
-  PrintAndLog("loaded %d samples", GraphTraceLen);
-  RepaintGraphWindow();
-  return 0;
+       FILE *f = fopen(filename, "r");
+       if (!f) {
+               PrintAndLog("couldn't open '%s'", filename);
+               return 0;
+       }
+
+       GraphTraceLen = 0;
+       char line[80];
+       while (fgets(line, sizeof (line), f)) {
+               GraphBuffer[GraphTraceLen] = atoi(line);
+               GraphTraceLen++;
+       }
+       fclose(f);
+       PrintAndLog("loaded %d samples", GraphTraceLen);
+       RepaintGraphWindow();
+       return 0;

 }
 
 int CmdLtrim(const char *Cmd)
 {
 }
 
 int CmdLtrim(const char *Cmd)
 {

-  int ds = atoi(Cmd);
+       int ds = atoi(Cmd);

 
 

-  for (int i = ds; i < GraphTraceLen; ++i)
-    GraphBuffer[i-ds] = GraphBuffer[i];
-  GraphTraceLen -= ds;
+       if (GraphTraceLen <= 0) return 0;

 
 

-  RepaintGraphWindow();
-  return 0;
-}
+       for (int i = ds; i < GraphTraceLen; ++i)
+               GraphBuffer[i-ds] = GraphBuffer[i];

 
 

-/*
- * Manchester demodulate a bitstream. The bitstream needs to be already in
- * the GraphBuffer as 0 and 1 values
- *
- * Give the clock rate as argument in order to help the sync - the algorithm
- * resyncs at each pulse anyway.
- *
- * Not optimized by any means, this is the 1st time I'm writing this type of
- * routine, feel free to improve...
- *
- * 1st argument: clock rate (as number of samples per clock rate)
- *               Typical values can be 64, 32, 128...
- */
-int CmdManchesterDemod(const char *Cmd)
-{
-  int i, j, invert= 0;
-  int bit;
-  int clock;
-  int lastval = 0;
-  int low = 0;
-  int high = 0;
-  int hithigh, hitlow, first;
-  int lc = 0;
-  int bitidx = 0;
-  int bit2idx = 0;
-  int warnings = 0;
-
-  /* check if we're inverting output */
-  if (*Cmd == 'i')
-  {
-    PrintAndLog("Inverting output");
-    invert = 1;
-    ++Cmd;
-    do
-      ++Cmd;
-    while(*Cmd == ' '); // in case a 2nd argument was given
-  }
-
-  /* Holds the decoded bitstream: each clock period contains 2 bits       */
-  /* later simplified to 1 bit after manchester decoding.                 */
-  /* Add 10 bits to allow for noisy / uncertain traces without aborting   */
-  /* int BitStream[GraphTraceLen*2/clock+10]; */
-
-  /* But it does not work if compiling on WIndows: therefore we just allocate a */
-  /* large array */
-  uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0x00};
-
-  /* Detect high and lows */
-  for (i = 0; i < GraphTraceLen; i++)
-  {
-    if (GraphBuffer[i] > high)
-      high = GraphBuffer[i];
-    else if (GraphBuffer[i] < low)
-      low = GraphBuffer[i];
-  }
-
-  /* Get our clock */
-  clock = GetClock(Cmd, high, 1); 
-  int tolerance = clock/4;
-
-  /* Detect first transition */
-  /* Lo-Hi (arbitrary)       */
-  /* skip to the first high */
-  for (i= 0; i < GraphTraceLen; i++)
-    if (GraphBuffer[i] == high)
-      break;
-  /* now look for the first low */
-  for (; i < GraphTraceLen; i++)
-  {
-    if (GraphBuffer[i] == low)
-    {
-      lastval = i;
-      break;
-    }
-  }
-  
-  /* If we're not working with 1/0s, demod based off clock */
-  if (high != 1)
-  {
-       PrintAndLog("Entering path A"); 
-    bit = 0; /* We assume the 1st bit is zero, it may not be
-              * the case: this routine (I think) has an init problem.
-              * Ed.
-                         */
-    for (; i < (int)(GraphTraceLen / clock); i++)
-    {
-      hithigh = 0;
-      hitlow = 0;
-      first = 1;
-
-      /* Find out if we hit both high and low peaks */
-      for (j = 0; j < clock; j++)
-      {
-        if (GraphBuffer[(i * clock) + j] == high)
-          hithigh = 1;
-        else if (GraphBuffer[(i * clock) + j] == low)
-          hitlow = 1;
-
-        /* it doesn't count if it's the first part of our read
-           because it's really just trailing from the last sequence */
-        if (first && (hithigh || hitlow))
-          hithigh = hitlow = 0;
-        else
-          first = 0;
-
-        if (hithigh && hitlow)
-          break;
-      }
-
-      /* If we didn't hit both high and low peaks, we had a bit transition */
-      if (!hithigh || !hitlow)
-        bit ^= 1;
-
-      BitStream[bit2idx++] = bit ^ invert;
-    }
-  }
-
-  /* standard 1/0 bitstream */
-  else
-  {
-
-    /* Then detect duration between 2 successive transitions */
-    for (bitidx = 1; i < GraphTraceLen; i++)
-    {
-      if (GraphBuffer[i-1] != GraphBuffer[i])
-      {
-      lc = i-lastval;
-      lastval = i;
-
-      // Error check: if bitidx becomes too large, we do not
-      // have a Manchester encoded bitstream or the clock is really
-      // wrong!
-      if (bitidx > (GraphTraceLen*2/clock+8) ) {
-        PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
-        return 0;
-      }
-      // Then switch depending on lc length:
-      // Tolerance is 1/4 of clock rate (arbitrary)
-      if (abs(lc-clock/2) < tolerance) {
-        // Short pulse : either "1" or "0"
-        BitStream[bitidx++]=GraphBuffer[i-1];
-      } else if (abs(lc-clock) < tolerance) {
-        // Long pulse: either "11" or "00"
-        BitStream[bitidx++]=GraphBuffer[i-1];
-        BitStream[bitidx++]=GraphBuffer[i-1];
-      } else {
-        // Error
-          warnings++;
-        PrintAndLog("Warning: Manchester decode error for pulse width detection.");
-        PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)");
-
-          if (warnings > 10)
-          {
-            PrintAndLog("Error: too many detection errors, aborting.");
-            return 0;
-          }
-        }
-      }
-    }
+       GraphTraceLen -= ds;
+       RepaintGraphWindow();
+       return 0;
+}

 
 

-    // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream
-    // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful
-    // to stop output at the final bitidx2 value, not bitidx
-       
-       //http://www.proxmark.org/forum/viewtopic.php?id=403
-    for (i = 1; i < bitidx; i += 2) {
-      if ((BitStream[i] == 0) && (BitStream[i+1] == 1)) {
-        BitStream[bit2idx++] = 1 ^ invert;
-    } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) {
-      BitStream[bit2idx++] = 0 ^ invert;
-    } else {
-      // We cannot end up in this state, this means we are unsynchronized,
-      // move up 1 bit:
-      i++;
-      warnings++;
-      PrintAndLog("Unsynchronized, resync...");
-      PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)");
-
-        if (warnings > 10)
-        {
-          PrintAndLog("Error: too many decode errors, aborting.");
-          return 0;
-        }
-      }
-    }
-  }
-
-  PrintAndLog("Manchester decoded bitstream");
-  // Now output the bitstream to the scrollback by line of 16 bits
-  for (i = 0; i < (bit2idx-16); i+=16) {
-    PrintAndLog("%i %i %i %i %i %i %i %i %i %i %i %i %i %i %i %i",
-      BitStream[i],
-      BitStream[i+1],
-      BitStream[i+2],
-      BitStream[i+3],
-      BitStream[i+4],
-      BitStream[i+5],
-      BitStream[i+6],
-      BitStream[i+7],
-      BitStream[i+8],
-      BitStream[i+9],
-      BitStream[i+10],
-      BitStream[i+11],
-      BitStream[i+12],
-      BitStream[i+13],
-      BitStream[i+14],
-      BitStream[i+15]);
-  }
-  return bit2idx;
-}
-
-/* Modulate our data into manchester */
-int CmdManchesterMod(const char *Cmd)
-{
-  int i, j;
-  int bit, lastbit, wave;
-  int clock = GetClock(Cmd, 0, 1);
-  int clock1 = GetT55x7Clock( GraphBuffer, GraphTraceLen, 0 );
-  PrintAndLog("MAN MOD CLOCKS:  %d  ice %d", clock,clock1);
-  
-  int half = (int)(clock/2);
-  
-  wave = 0;
-  lastbit = 1;
-  for (i = 0; i < (int)(GraphTraceLen / clock); i++)
-  {
-    bit = GraphBuffer[i * clock] ^ 1;
-
-    for (j = 0; j < half; ++j)
-      GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave;
-    for (j = half; j < clock; ++j)
-      GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave ^ 1;
-
-    /* Keep track of how we start our wave and if we changed or not this time */
-    wave ^= bit ^ lastbit;
-    lastbit = bit;
-  }
-
-  RepaintGraphWindow();
-  return 0;
+// trim graph to input argument length
+int CmdRtrim(const char *Cmd)
+{
+       int ds = atoi(Cmd);
+       GraphTraceLen = ds;
+       RepaintGraphWindow();
+       return 0;

 }
 
 int CmdNorm(const char *Cmd)
 {
 }
 
 int CmdNorm(const char *Cmd)
 {

-  int i;
-  int max = INT_MIN, min = INT_MAX;
-
-  for (i = 10; i < GraphTraceLen; ++i) {
-    if (GraphBuffer[i] > max)
-      max = GraphBuffer[i];
-    if (GraphBuffer[i] < min)
-      min = GraphBuffer[i];
-  }
+       int i;
+       int max = INT_MIN, min = INT_MAX;
+
+       for (i = 10; i < GraphTraceLen; ++i) {
+               if (GraphBuffer[i] > max)
+                       max = GraphBuffer[i];
+               if (GraphBuffer[i] < min)
+                       min = GraphBuffer[i];
+       }

 
 

-  if (max != min) {
-    for (i = 0; i < GraphTraceLen; ++i) {
-      GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 1000 /
-        (max - min);
-    }
-  }
-  RepaintGraphWindow();
-  return 0;
+       if (max != min) {
+               for (i = 0; i < GraphTraceLen; ++i) {
+                       GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
+                               (max - min);
+                               //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
+               }
+       }
+       RepaintGraphWindow();
+       return 0;

 }
 
 int CmdPlot(const char *Cmd)
 {
 }
 
 int CmdPlot(const char *Cmd)
 {

-  ShowGraphWindow();
-  return 0;
+       ShowGraphWindow();
+       return 0;

 }
 
 int CmdSave(const char *Cmd)
 {
 }
 
 int CmdSave(const char *Cmd)
 {

-   char filename[FILE_PATH_SIZE] = {0x00};
-   int len = 0;
+       char filename[FILE_PATH_SIZE] = {0x00};
+       int len = 0;
+
+       len = strlen(Cmd);
+       if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
+       memcpy(filename, Cmd, len);
+        
+
+       FILE *f = fopen(filename, "w");
+       if(!f) {
+               PrintAndLog("couldn't open '%s'", filename);
+               return 0;
+       }
+       int i;
+       for (i = 0; i < GraphTraceLen; i++) {
+               fprintf(f, "%d\n", GraphBuffer[i]);
+       }
+       fclose(f);
+       PrintAndLog("saved to '%s'", Cmd);
+       return 0;
+}
+
+int CmdScale(const char *Cmd)
+{
+       CursorScaleFactor = atoi(Cmd);
+       if (CursorScaleFactor == 0) {
+               PrintAndLog("bad, can't have zero scale");
+               CursorScaleFactor = 1;
+       }
+       RepaintGraphWindow();
+       return 0;
+}
+
+int CmdDirectionalThreshold(const char *Cmd)
+{
+       int8_t upThres = param_get8(Cmd, 0);
+       int8_t downThres = param_get8(Cmd, 1);

 
 

-   len = strlen(Cmd);
-   if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
-   memcpy(filename, Cmd, len);
-   
+       printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);

 
 

-  FILE *f = fopen(filename, "w");
-  if(!f) {
-    PrintAndLog("couldn't open '%s'", filename);
-    return 0;
-  }
-  int i;
-  for (i = 0; i < GraphTraceLen; i++) {
-    fprintf(f, "%d\n", GraphBuffer[i]);
-  }
-  fclose(f);
-  PrintAndLog("saved to '%s'", Cmd);
-  return 0;
+       int lastValue = GraphBuffer[0];
+       GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
+
+       for (int i = 1; i < GraphTraceLen; ++i) {
+               // Apply first threshold to samples heading up
+               if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
+               {
+                       lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
+                       GraphBuffer[i] = 1;
+               }
+               // Apply second threshold to samples heading down
+               else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
+               {
+                       lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
+                       GraphBuffer[i] = -1;
+               }
+               else
+               {
+                       lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
+                       GraphBuffer[i] = GraphBuffer[i-1];
+
+               }
+       }
+       GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
+       RepaintGraphWindow();
+       return 0;

 }
 
 }
 

-int CmdScale(const char *Cmd)
+int CmdZerocrossings(const char *Cmd)

 {
 {

-  CursorScaleFactor = atoi(Cmd);
-  if (CursorScaleFactor == 0) {
-    PrintAndLog("bad, can't have zero scale");
-    CursorScaleFactor = 1;
-  }
-  RepaintGraphWindow();
-  return 0;
+       // Zero-crossings aren't meaningful unless the signal is zero-mean.
+       CmdHpf("");
+
+       int sign = 1;
+       int zc = 0;
+       int lastZc = 0;
+
+       for (int i = 0; i < GraphTraceLen; ++i) {
+               if (GraphBuffer[i] * sign >= 0) {
+                       // No change in sign, reproduce the previous sample count.
+                       zc++;
+                       GraphBuffer[i] = lastZc;
+               } else {
+                       // Change in sign, reset the sample count.
+                       sign = -sign;
+                       GraphBuffer[i] = lastZc;
+                       if (sign > 0) {
+                               lastZc = zc;
+                               zc = 0;
+                       }
+               }
+       }
+
+       RepaintGraphWindow();
+       return 0;
+}
+
+int usage_data_bin2hex(){
+               PrintAndLog("Usage: data bin2hex <binary_digits>");
+               PrintAndLog("       This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
+               return 0;

 }
 
 }
 

-int CmdThreshold(const char *Cmd)
+/**
+ * @brief Utility for conversion via cmdline.
+ * @param Cmd
+ * @return
+ */
+int Cmdbin2hex(const char *Cmd)

 {
 {

-  int threshold = atoi(Cmd);
+       int bg =0, en =0;
+       if(param_getptr(Cmd, &bg, &en, 0))
+       {
+               return usage_data_bin2hex();
+       }
+       //Number of digits supplied as argument
+       size_t length = en  - bg +1;
+       size_t bytelen = (length+7) / 8;
+       uint8_t* arr = (uint8_t *) malloc(bytelen);
+       memset(arr, 0, bytelen);
+       BitstreamOut bout = { arr, 0, 0 };
+
+       for(; bg <= en ;bg++)
+       {
+               char c = Cmd[bg];
+               if( c == '1')   pushBit(&bout, 1);
+               else if( c == '0')      pushBit(&bout, 0);
+               else PrintAndLog("Ignoring '%c'", c);
+       }

 
 

-  for (int i = 0; i < GraphTraceLen; ++i) {
-    if (GraphBuffer[i] >= threshold)
-      GraphBuffer[i] = 1;
-    else
-      GraphBuffer[i] = -1;
-  }
-  RepaintGraphWindow();
-  return 0;
+       if(bout.numbits % 8 != 0)
+       {
+               printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
+       }
+
+       //Uses printf instead of PrintAndLog since the latter
+       // adds linebreaks to each printout - this way was more convenient since we don't have to
+       // allocate a string and write to that first...
+       for(size_t x = 0; x  < bytelen ; x++)
+       {
+               printf("%02X", arr[x]);
+       }
+       printf("\n");
+       free(arr);
+       return 0;

 }
 
 }
 

-int CmdDirectionalThreshold(const char *Cmd)
+int usage_data_hex2bin(){
+       PrintAndLog("Usage: data hex2bin <hex_digits>");
+       PrintAndLog("       This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
+       return 0;
+}
+
+int Cmdhex2bin(const char *Cmd)

 {
 {

-       int8_t upThres = param_get8(Cmd, 0);
-       int8_t downThres = param_get8(Cmd, 1);
-  
-  printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
-  
-  int lastValue = GraphBuffer[0];
-  GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
-  
-  for (int i = 1; i < GraphTraceLen; ++i) {
-    // Apply first threshold to samples heading up
-    if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
-    {
-      lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
-      GraphBuffer[i] = 1;
-    }
-    // Apply second threshold to samples heading down
-    else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
-    {
-      lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
-      GraphBuffer[i] = -1;
-    }
-    else
-    {
-      lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
-      GraphBuffer[i] = GraphBuffer[i-1];
+       int bg =0, en =0;
+       if(param_getptr(Cmd, &bg, &en, 0))  return usage_data_hex2bin();
+
+       while(bg <= en )
+       {
+               char x = Cmd[bg++];
+               // capitalize
+               if (x >= 'a' && x <= 'f')
+                       x -= 32;
+               // convert to numeric value
+               if (x >= '0' && x <= '9')
+                       x -= '0';
+               else if (x >= 'A' && x <= 'F')
+                       x -= 'A' - 10;
+               else
+                       continue;
+
+               //Uses printf instead of PrintAndLog since the latter
+               // adds linebreaks to each printout - this way was more convenient since we don't have to
+               // allocate a string and write to that first...
+
+               for(int i= 0 ; i < 4 ; ++i)
+                       printf("%d",(x >> (3 - i)) & 1);
+       }
+       printf("\n");

 
 

-    }
-  }
-  GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
-  RepaintGraphWindow();
-  return 0;
+       return 0;

 }
 
 }
 

-int CmdZerocrossings(const char *Cmd)
+static command_t CommandTable[] =

 {
 {

-  // Zero-crossings aren't meaningful unless the signal is zero-mean.
-  CmdHpf("");
-
-  int sign = 1;
-  int zc = 0;
-  int lastZc = 0;
-
-  for (int i = 0; i < GraphTraceLen; ++i) {
-    if (GraphBuffer[i] * sign >= 0) {
-      // No change in sign, reproduce the previous sample count.
-      zc++;
-      GraphBuffer[i] = lastZc;
-    } else {
-      // Change in sign, reset the sample count.
-      sign = -sign;
-      GraphBuffer[i] = lastZc;
-      if (sign > 0) {
-        lastZc = zc;
-        zc = 0;
-      }
-    }
-  }
-
-  RepaintGraphWindow();
-  return 0;
-}
-
-static command_t CommandTable[] = 
-{
-  {"help",          CmdHelp,            1, "This help"},
-  {"amp",           CmdAmp,             1, "Amplify peaks"},
-  {"askdemod",      Cmdaskdemod,        1, "<0|1> -- Attempt to demodulate simple ASK tags"},
-  {"autocorr",      CmdAutoCorr,        1, "<window length> -- Autocorrelation over window"},
-  {"bitsamples",    CmdBitsamples,      0, "Get raw samples as bitstring"},
-  {"bitstream",     CmdBitstream,       1, "[clock rate] -- Convert waveform into a bitstream"},
-  {"buffclear",     CmdBuffClear,       1, "Clear sample buffer and graph window"},
-  {"dec",           CmdDec,             1, "Decimate samples"},
-  {"detectclock",   CmdDetectClockRate, 1, "Detect clock rate"},
-  {"dirthreshold",  CmdDirectionalThreshold,   1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
-  {"fskdemod",      CmdFSKdemod,        1, "Demodulate graph window as a HID FSK"},
-  {"grid",          CmdGrid,            1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
-  {"hexsamples",    CmdHexsamples,      0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},  
-  {"hide",          CmdHide,            1, "Hide graph window"},
-  {"hpf",           CmdHpf,             1, "Remove DC offset from trace"},
-  {"load",          CmdLoad,            1, "<filename> -- Load trace (to graph window"},
-  {"ltrim",         CmdLtrim,           1, "<samples> -- Trim samples from left of trace"},
-  {"mandemod",      CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"},
-  {"manmod",        CmdManchesterMod,   1, "[clock rate] -- Manchester modulate a binary stream"},
-  {"norm",          CmdNorm,            1, "Normalize max/min to +/-500"},
-  {"plot",          CmdPlot,            1, "Show graph window (hit 'h' in window for keystroke help)"},
-  {"samples",       CmdSamples,         0, "[512 - 40000] -- Get raw samples for graph window"},
-  {"save",          CmdSave,            1, "<filename> -- Save trace (from graph window)"},
-  {"scale",         CmdScale,           1, "<int> -- Set cursor display scale"},
-  {"threshold",     CmdThreshold,       1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
-  {"tune",          CmdTuneSamples,     0, "Get hw tune samples for graph window"},
-  {"zerocrossings", CmdZerocrossings,   1, "Count time between zero-crossings"},
-  {NULL, NULL, 0, NULL}
+       {"help",            CmdHelp,            1, "This help"},
+       {"askedgedetect",   CmdAskEdgeDetect,   1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"},
+       {"askem410xdemod",  CmdAskEM410xDemod,  1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
+       {"askgproxiidemod", CmdG_Prox_II_Demod, 1, "Demodulate a G Prox II tag from GraphBuffer"},
+       {"askvikingdemod",  CmdVikingDemod,     1, "Demodulate a Viking AM tag from GraphBuffer"},
+       {"autocorr",        CmdAutoCorr,        1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
+       {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
+       {"bin2hex",         Cmdbin2hex,         1, "bin2hex <digits>     -- Converts binary to hexadecimal"},
+       {"bitsamples",      CmdBitsamples,      0, "Get raw samples as bitstring"},
+       {"buffclear",       CmdBuffClear,       1, "Clear sample buffer and graph window"},
+       {"dec",             CmdDec,             1, "Decimate samples"},
+       {"detectclock",     CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
+       {"fdxbdemod",       CmdFDXBdemodBI    , 1, "Demodulate a FDX-B ISO11784/85 Biphase tag from GraphBuffer"},
+       {"fskawiddemod",    CmdFSKdemodAWID,    1, "Demodulate an AWID FSK tag from GraphBuffer"},
+       //{"fskfcdetect",   CmdFSKfcDetect,     1, "Try to detect the Field Clock of an FSK wave"},
+       {"fskhiddemod",     CmdFSKdemodHID,     1, "Demodulate a HID FSK tag from GraphBuffer"},
+       {"fskiodemod",      CmdFSKdemodIO,      1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
+       {"fskpyramiddemod", CmdFSKdemodPyramid, 1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
+       {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
+       {"getbitstream",    CmdGetBitStream,    1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
+       {"grid",            CmdGrid,            1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
+       {"hexsamples",      CmdHexsamples,      0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
+       {"hex2bin",         Cmdhex2bin,         1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
+       {"hide",            CmdHide,            1, "Hide graph window"},
+       {"hpf",             CmdHpf,             1, "Remove DC offset from trace"},
+       {"load",            CmdLoad,            1, "<filename> -- Load trace (to graph window"},
+       {"ltrim",           CmdLtrim,           1, "<samples> -- Trim samples from left of trace"},
+       {"rtrim",           CmdRtrim,           1, "<location to end trace> -- Trim samples from right of trace"},
+       {"manrawdecode",    Cmdmandecoderaw,    1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
+       {"norm",            CmdNorm,            1, "Normalize max/min to +/-128"},
+       {"plot",            CmdPlot,            1, "Show graph window (hit 'h' in window for keystroke help)"},
+       {"printdemodbuffer",CmdPrintDemodBuff,  1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
+       {"pskindalademod",  CmdIndalaDecode,    1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
+       {"psknexwatchdemod",CmdPSKNexWatch,     1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
+       {"rawdemod",        CmdRawDemod,        1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},  
+       {"samples",         CmdSamples,         0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
+       {"save",            CmdSave,            1, "<filename> -- Save trace (from graph window)"},
+       {"scale",           CmdScale,           1, "<int> -- Set cursor display scale"},
+       {"setdebugmode",    CmdSetDebugMode,    1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
+       {"shiftgraphzero",  CmdGraphShiftZero,  1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
+       {"dirthreshold",    CmdDirectionalThreshold,   1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
+       {"tune",            CmdTuneSamples,     0, "Get hw tune samples for graph window"},
+       {"undec",           CmdUndec,           1, "Un-decimate samples by 2"},
+       {"zerocrossings",   CmdZerocrossings,   1, "Count time between zero-crossings"},
+       {NULL, NULL, 0, NULL}

 };
 
 };
 

-int CmdData(const char *Cmd)
-{
-  CmdsParse(CommandTable, Cmd);
-  return 0;
+int CmdData(const char *Cmd){
+       clearCommandBuffer();
+       CmdsParse(CommandTable, Cmd);
+       return 0;

 }
 
 int CmdHelp(const char *Cmd)
 {
 }
 
 int CmdHelp(const char *Cmd)
 {

-  CmdsHelp(CommandTable);
-  return 0;
+       CmdsHelp(CommandTable);
+       return 0;

 }
 }