X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/f9f0e83b7cf98887fc5dbe97bcb491b8c45c7d69..881eacc8aad5d52b33d8585fdb5a93590545c558:/client/cmddata.c

diff --git a/client/cmddata.c b/client/cmddata.c
index cce39089..1f548284 100644
--- a/client/cmddata.c
+++ b/client/cmddata.c
@@ -22,13 +22,15 @@
 #include "cmdparser.h"// already included in cmdmain.h
 #include "usb_cmd.h"  // already included in cmdmain.h and proxmark3.h
 #include "lfdemod.h"  // for demod code
-#include "crc.h"      // for pyramid checksum maxim
-#include "crc16.h"    // for FDXB demod checksum
 #include "loclass/cipherutils.h" // for decimating samples in getsamples
+#include "cmdlfem4x.h"// for em410x demod
 
 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
 uint8_t g_debugMode=0;
 size_t DemodBufferLen=0;
+int g_DemodStartIdx=0;
+int g_DemodClock=0;
+
 static int CmdHelp(const char *Cmd);
 
 //set the demod buffer with given array of binary (one bit per byte)
@@ -38,8 +40,8 @@ void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
 	if (buff == NULL) 
 		return;
 
-	if ( size >= MAX_DEMOD_BUF_LEN)
-		size = MAX_DEMOD_BUF_LEN;
+	if ( size > MAX_DEMOD_BUF_LEN - startIdx)
+		size = MAX_DEMOD_BUF_LEN - startIdx;
 
 	size_t i = 0;
 	for (; i < size; i++){
@@ -49,6 +51,42 @@ void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
 	return;
 }
 
+bool getDemodBuf(uint8_t *buff, size_t *size) {
+	if (buff == NULL) return false;
+	if (size == NULL) return false;
+	if (*size == 0) return false;
+
+	*size = (*size > DemodBufferLen) ? DemodBufferLen : *size;
+
+	memcpy(buff, DemodBuffer, *size);
+	return true;
+}
+
+// option '1' to save DemodBuffer any other to restore
+void save_restoreDB(uint8_t saveOpt)
+{
+	static uint8_t SavedDB[MAX_DEMOD_BUF_LEN];
+	static size_t SavedDBlen;
+	static bool DB_Saved = false;
+	static int savedDemodStartIdx = 0;
+	static int savedDemodClock = 0;
+
+	if (saveOpt == GRAPH_SAVE) { //save
+
+		memcpy(SavedDB, DemodBuffer, sizeof(DemodBuffer));
+		SavedDBlen = DemodBufferLen;
+		DB_Saved=true;
+		savedDemodStartIdx = g_DemodStartIdx;
+		savedDemodClock = g_DemodClock;
+	} else if (DB_Saved) { //restore
+		memcpy(DemodBuffer, SavedDB, sizeof(DemodBuffer));
+		DemodBufferLen = SavedDBlen;
+		g_DemodClock = savedDemodClock;
+		g_DemodStartIdx = savedDemodStartIdx;
+	}
+	return;
+}
+
 int CmdSetDebugMode(const char *Cmd)
 {
 	int demod=0;
@@ -156,157 +194,6 @@ int CmdGetBitStream(const char *Cmd)
 	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%016" PRIX64, hi, id);
-		} else{
-			//output 40 bit em id
-			PrintAndLog("\nEM TAG ID      : %010" PRIX64, id);
-			PrintAndLog("\nPossible de-scramble patterns");
-			PrintAndLog("Unique TAG ID  : %010" PRIX64,  id2lo);
-			PrintAndLog("HoneyWell IdentKey {");
-			PrintAndLog("DEZ 8          : %08" PRIu64,id & 0xFFFFFF);
-			PrintAndLog("DEZ 10         : %010" PRIu64,id & 0xFFFFFFFF);
-			PrintAndLog("DEZ 5.5        : %05lld.%05" PRIu64,(id>>16LL) & 0xFFFF,(id & 0xFFFF));
-			PrintAndLog("DEZ 3.5A       : %03lld.%05" PRIu64,(id>>32ll),(id & 0xFFFF));
-			PrintAndLog("DEZ 3.5B       : %03lld.%05" PRIu64,(id & 0xFF000000) >> 24,(id & 0xFFFF));
-			PrintAndLog("DEZ 3.5C       : %03lld.%05" PRIu64,(id & 0xFF0000) >> 16,(id & 0xFFFF));
-			PrintAndLog("DEZ 14/IK2     : %014" PRIu64,id);
-			PrintAndLog("DEZ 15/IK3     : %015" PRIu64,id2lo);
-			PrintAndLog("DEZ 20/ZK      : %02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64 "%02" PRIu64,
-			    (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          : %05" PRIu64 "_%03" PRIu64 "_%08" PRIu64 "",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));  
-			PrintAndLog("Pattern Paxton : %" PRIu64 " [0x%" PRIX64 "]", 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 AskEm410xDecode(bool verbose, uint32_t *hi, uint64_t *lo )
-{
-	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;
-}
-
-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);
-}
-
-//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);
-}
-
 //by marshmellow
 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
 //   (amp may not be needed anymore)
@@ -341,13 +228,22 @@ int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType,
 		askAmp(BitStream, BitLen); 
 	}
 	bool st = false;
-	if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk);
+	size_t ststart = 0, stend = 0;
+	if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk, &ststart, &stend);
+	*stCheck = st;
 	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);
+		CursorCPos = ststart;
+		CursorDPos = stend;
+		if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
+		//Graph ST trim (for testing)
+		//for (int i = 0; i < BitLen; i++) {
+		//	GraphBuffer[i] = BitStream[i]-128;
+		//}
+		//RepaintGraphWindow();
+	}
+	int startIdx = 0;
+	int errCnt = askdemod_ext(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType, &startIdx);
 	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;
@@ -357,9 +253,10 @@ int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType,
 		return 0;
 	}
 	if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
-
 	//output
 	setDemodBuf(BitStream,BitLen,0);
+	setClockGrid(clk, startIdx);
+
 	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);
@@ -403,13 +300,13 @@ int Cmdaskmandemod(const char *Cmd)
 		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;
+	bool st = true;
 	if (Cmd[0]=='s') 
-		return ASKDemod_ext(Cmd++, TRUE, TRUE, 1, &st);
+		return ASKDemod_ext(Cmd++, true, false, 1, &st);
 	else if (Cmd[1] == 's')
-		return ASKDemod_ext(Cmd+=2, TRUE, TRUE, 1, &st);
+		return ASKDemod_ext(Cmd+=2, true, false, 1, &st);
 	else
-		return ASKDemod(Cmd, TRUE, TRUE, 1);
+		return ASKDemod(Cmd, true, false, 1);
 }
 
 //by marshmellow
@@ -434,7 +331,7 @@ int Cmdmandecoderaw(const char *Cmd)
 		return 0;
 	}
 	if (DemodBufferLen==0) return 0;
-	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
+	uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
 	int high=0,low=0;
 	for (;i<DemodBufferLen;++i){
 		if (DemodBuffer[i]>high) high=DemodBuffer[i];
@@ -448,7 +345,8 @@ int Cmdmandecoderaw(const char *Cmd)
 
 	sscanf(Cmd, "%i %i", &invert, &maxErr);
 	size=i;
-	errCnt=manrawdecode(BitStream, &size, invert);
+	uint8_t alignPos = 0;
+	errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
 	if (errCnt>=maxErr){
 		PrintAndLog("Too many errors: %d",errCnt);
 		return 0;
@@ -495,14 +393,14 @@ int CmdBiphaseDecodeRaw(const char *Cmd)
 		return 0;
 	}
 	sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
-	if (DemodBufferLen==0){
+	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);
+	uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
+	size = sizeof(BitStream);
+	if ( !getDemodBuf(BitStream, &size) ) return 0;
+	errCnt=BiphaseRawDecode(BitStream, &size, &offset, invert);
 	if (errCnt<0){
 		PrintAndLog("Error during decode:%d", errCnt);
 		return 0;
@@ -515,10 +413,12 @@ int CmdBiphaseDecodeRaw(const char *Cmd)
 	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
+	setClockGrid(g_DemodClock, g_DemodStartIdx + g_DemodClock*offset/2);
 	return 1;
 }
 
@@ -530,27 +430,29 @@ int ASKbiphaseDemod(const char *Cmd, bool verbose)
 	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);	  
+	uint8_t BitStream[MAX_GRAPH_TRACE_LEN];	  
+	size_t size = getFromGraphBuf(BitStream);
+	int startIdx = 0;
 	//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);  
+	int errCnt = askdemod_ext(BitStream, &size, &clk, &invert, maxErr, 0, 0, &startIdx);  
 	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);
+	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);
+	setClockGrid(clk, startIdx + clk*offset/2);
 	if (g_debugMode || verbose){
 		PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
 		printDemodBuff();
@@ -584,98 +486,7 @@ int Cmdaskbiphdemod(const char *Cmd)
 		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, (unsigned int) checksum);
-	PrintAndLog("Raw: %08X%08X", raw1,raw2);
-	setDemodBuf(DemodBuffer+ans, 64, 0);
-	return 1;
+	return ASKbiphaseDemod(Cmd, true);
 }
 
 //by marshmellow - see ASKDemod
@@ -699,48 +510,47 @@ int Cmdaskrawdemod(const char *Cmd)
 		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);
+	return ASKDemod(Cmd, true, false, 0);
 }
 
-int AutoCorrelate(int window, bool SaveGrph, bool verbose)
+int AutoCorrelate(const int *in, int *out, size_t len, 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) {
+	for (int i = 0; i < len - window; ++i) {
 		int sum = 0;
 		for (int j = 0; j < window; ++j) {
-			sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
+			sum += (in[j]*in[i + j]) / 256;
 		}
 		CorrelBuffer[i] = sum;
-		if (sum >= maxSum-100 && sum <= maxSum+100){
+		if (sum >= maxSum-100 && sum <= maxSum+100) {
 			//another max
 			Correlation = i-lastMax;
 			lastMax = i;
 			if (sum > maxSum) maxSum = sum;
-		} else if (sum > maxSum){
+		} else if (sum > maxSum) {
 			maxSum=sum;
 			lastMax = i;
 		}
 	}
-	if (Correlation==0){
+	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)){
+		for (int i = 0; i < len - 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));
+	if (SaveGrph) {
+		//GraphTraceLen = GraphTraceLen - window;
+		memcpy(out, CorrelBuffer, len * sizeof(int));
 		RepaintGraphWindow();  
 	}
 	return Correlation;
@@ -764,7 +574,7 @@ int CmdAutoCorr(const char *Cmd)
 		return usage_data_autocorr();
 	int window = 4000; //set default
 	char grph=0;
-	bool updateGrph = FALSE;
+	bool updateGrph = false;
 	sscanf(Cmd, "%i %c", &window, &grph);
 
 	if (window >= GraphTraceLen) {
@@ -772,8 +582,8 @@ int CmdAutoCorr(const char *Cmd)
 			GraphTraceLen);
 		return 0;
 	}
-	if (grph == 'g') updateGrph=TRUE;
-	return AutoCorrelate(window, updateGrph, TRUE);
+	if (grph == 'g') updateGrph=true;
+	return AutoCorrelate(GraphBuffer, GraphBuffer, GraphTraceLen, window, updateGrph, true);
 }
 
 int CmdBitsamples(const char *Cmd)
@@ -876,6 +686,18 @@ int CmdGraphShiftZero(const char *Cmd)
 	return 0;
 }
 
+int AskEdgeDetect(const int *in, int *out, int len, int threshold) {
+	int Last = 0;
+	for(int i = 1; i<len; i++) {
+		if (in[i]-in[i-1] >= threshold) //large jump up
+			Last = 127;
+		else if(in[i]-in[i-1] <= -1 * threshold) //large jump down
+			Last = -127;
+		out[i-1] = Last;
+	}
+	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 
@@ -883,18 +705,12 @@ int CmdGraphShiftZero(const char *Cmd)
 int CmdAskEdgeDetect(const char *Cmd)
 {
 	int thresLen = 25;
-	int Last = 0;
+	int ans = 0;
 	sscanf(Cmd, "%i", &thresLen); 
 
-	for(int i = 1; i<GraphTraceLen; i++){
-		if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
-			Last = 127;
-		else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
-			Last = -127;
-		GraphBuffer[i-1] = Last;
-	}
+	ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen);
 	RepaintGraphWindow();
-	return 0;
+	return ans;
 }
 
 /* Print our clock rate */
@@ -988,14 +804,17 @@ int FSKrawDemod(const char *Cmd, bool verbose)
 	}
 	//get bit clock length
 	if (!rfLen) {
-		rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
+		int firstClockEdge = 0; //todo - align grid on graph with this...
+		rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge);
 		if (!rfLen) rfLen = 50;
 	}
-	int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
+	int startIdx = 0;
+	int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow, &startIdx);
 	if (size > 0) {
 		setDemodBuf(BitStream,size,0);
+		setClockGrid(rfLen, startIdx);
 
-		// Now output the bitstream to the scrollback by line of 16 bits
+    // 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));
@@ -1032,560 +851,9 @@ int CmdFSKrawdemod(const char *Cmd)
 		PrintAndLog("          : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
 		return 0;
 	}
-	return FSKrawDemod(Cmd, TRUE);
-}
-
-//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){
-			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) 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){
-			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 = unknown 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) 
-			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 = unknown 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);
-		if (fmtLen>32){
-			//code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
-			//code2 = bytebits_to_byte(BitStream+(size-32),32);
-			PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
-		} else{
-			//code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
-			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;
+	return FSKrawDemod(Cmd, true);
 }
 
-// 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-%012" PRIu64, countryCode, NationalCode);
-	PrintAndLog("National Code: %012" PRIu64, 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)
@@ -1605,16 +873,9 @@ int PSKDemod(const char *Cmd, bool verbose)
 	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);
+	int startIdx = 0;
+	errCnt = pskRawDemod_ext(BitStream, &BitLen, &clk, &invert, &startIdx);
 	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;
@@ -1631,98 +892,8 @@ int PSKDemod(const char *Cmd, bool verbose)
 	}
 	//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) 
-			PrintAndLog("Error1: %d",ans);
-		return 0;
-	}
-	uint8_t invert=0;
-	size_t size = DemodBufferLen;
-	int startIdx = indala26decode(DemodBuffer, &size, &invert);
-	if (startIdx < 0 || size > 224) {
-		if (g_debugMode)
-			PrintAndLog("Error2: %d",ans);
-		return -1;
-	}
-	setDemodBuf(DemodBuffer, size, (size_t)startIdx);
-	if (invert)
-		if (g_debugMode)
-			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;
-	} 
+	setClockGrid(clk, startIdx);
 
-	CmdPrintDemodBuff("x");
 	return 1;
 }
 
@@ -1748,7 +919,8 @@ int NRZrawDemod(const char *Cmd, bool verbose)
 	size_t BitLen = getFromGraphBuf(BitStream);
 	if (BitLen==0) return 0;
 	int errCnt=0;
-	errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
+	int clkStartIdx = 0;
+	errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
 	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;
@@ -1760,6 +932,8 @@ int NRZrawDemod(const char *Cmd, bool verbose)
 	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);
+	setClockGrid(clk, clkStartIdx);
+
 
 	if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
 	if (verbose || g_debugMode) {
@@ -1786,7 +960,7 @@ int CmdNRZrawDemod(const char *Cmd)
 		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);
+	return NRZrawDemod(Cmd, true);
 }
 
 // by marshmellow
@@ -1810,7 +984,7 @@ int CmdPSK1rawDemod(const char *Cmd)
 		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);
+	ans = PSKDemod(Cmd, true);
 	//output
 	if (!ans){
 		if (g_debugMode) PrintAndLog("Error demoding: %d",ans); 
@@ -1842,7 +1016,7 @@ int CmdPSK2rawDemod(const char *Cmd)
 		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);
+	ans=PSKDemod(Cmd, true);
 	if (!ans){
 		if (g_debugMode) PrintAndLog("Error demoding: %d",ans);  
 		return 0;
@@ -1898,6 +1072,30 @@ int CmdRawDemod(const char *Cmd)
 	return ans;
 }
 
+void setClockGrid(int clk, int offset) {
+	g_DemodStartIdx = offset;
+	g_DemodClock = clk;
+	if (g_debugMode) PrintAndLog("demodoffset %d, clk %d",offset,clk);
+
+	if (offset > clk) offset %= clk;
+	if (offset < 0) offset += clk;
+
+	if (offset > GraphTraceLen || offset < 0) return;
+	if (clk < 8 || clk > GraphTraceLen) {
+		GridLocked = false;
+		GridOffset = 0;
+		PlotGridX = 0;
+		PlotGridXdefault = 0;
+		RepaintGraphWindow();
+	} else {
+		GridLocked = true;
+		GridOffset = offset;
+		PlotGridX = clk;
+		PlotGridXdefault = clk;
+		RepaintGraphWindow();
+	}
+}
+
 int CmdGrid(const char *Cmd)
 {
 	sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
@@ -1989,7 +1187,7 @@ uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
 	return val;
 }
 
-int getSamples(const char *Cmd, bool silent)
+int getSamples(int n, bool silent)
 {
 	//If we get all but the last byte in bigbuf,
 	// we don't have to worry about remaining trash
@@ -1998,14 +1196,12 @@ int getSamples(const char *Cmd, bool silent)
 
 	uint8_t got[BIGBUF_SIZE-1] = { 0 };
 
-	int n = strtol(Cmd, NULL, 0);
-
 	if (n == 0 || n > sizeof(got))
 		n = sizeof(got);
 
-	PrintAndLog("Reading %d bytes from device memory\n", n);
+	if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n);
 	GetFromBigBuf(got,n,0);
-	PrintAndLog("Data fetched");
+	if (!silent) PrintAndLog("Data fetched");
 	UsbCommand response;
 	WaitForResponse(CMD_ACK, &response);
 	uint8_t bits_per_sample = 8;
@@ -2014,13 +1210,13 @@ int getSamples(const char *Cmd, bool silent)
 	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
+		if (!silent) 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...");
+		if (!silent) PrintAndLog("Unpacking...");
 		BitstreamIn bout = { got, bits_per_sample * n,  0};
 		int j =0;
 		for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
@@ -2037,13 +1233,16 @@ int getSamples(const char *Cmd, bool silent)
 		GraphTraceLen = n;
 	}
 
+	setClockGrid(0,0);
+	DemodBufferLen = 0;
 	RepaintGraphWindow();
 	return 0;
 }
 
 int CmdSamples(const char *Cmd)
 {
-	return getSamples(Cmd, false);
+	int n = strtol(Cmd, NULL, 0);
+	return getSamples(n, false);
 }
 
 int CmdTuneSamples(const char *Cmd)
@@ -2139,6 +1338,8 @@ int CmdLoad(const char *Cmd)
 	}
 	fclose(f);
 	PrintAndLog("loaded %d samples", GraphTraceLen);
+	setClockGrid(0,0);
+	DemodBufferLen = 0;
 	RepaintGraphWindow();
 	return 0;
 }
@@ -2166,6 +1367,22 @@ int CmdRtrim(const char *Cmd)
 	return 0;
 }
 
+// trim graph (middle) piece
+int CmdMtrim(const char *Cmd) {
+	int start = 0, stop = 0;
+	sscanf(Cmd, "%i %i", &start, &stop);
+
+	if (start > GraphTraceLen	|| stop > GraphTraceLen || start > stop) return 0;
+	start++; //leave start position sample
+
+	GraphTraceLen = stop - start;
+	for (int i = 0; i < GraphTraceLen; i++) {
+		GraphBuffer[i] = GraphBuffer[start+i];
+	}
+	return 0;
+}
+
+
 int CmdNorm(const char *Cmd)
 {
 	int i;
@@ -2180,8 +1397,7 @@ int CmdNorm(const char *Cmd)
 
 	if (max != min) {
 		for (i = 0; i < GraphTraceLen; ++i) {
-			GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
-				(max - min);
+			GraphBuffer[i] = ((long)(GraphBuffer[i] - ((max + min) / 2)) * 256) / (max - min);
 				//marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
 		}
 	}
@@ -2230,37 +1446,42 @@ int CmdScale(const char *Cmd)
 	return 0;
 }
 
-int CmdDirectionalThreshold(const char *Cmd)
+int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down)
 {
-	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 = in[0];
+	out[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
 
-	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) {
+	for (int i = 1; i < len; ++i) {
 		// Apply first threshold to samples heading up
-		if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
+		if (in[i] >= up && in[i] > lastValue)
 		{
-			lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
-			GraphBuffer[i] = 1;
+			lastValue = out[i]; // Buffer last value as we overwrite it.
+			out[i] = 1;
 		}
 		// Apply second threshold to samples heading down
-		else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
+		else if (in[i] <= down && in[i] < lastValue)
 		{
-			lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
-			GraphBuffer[i] = -1;
+			lastValue = out[i]; // Buffer last value as we overwrite it.
+			out[i] = -1;
 		}
 		else
 		{
-			lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
-			GraphBuffer[i] = GraphBuffer[i-1];
-
+			lastValue = out[i]; // Buffer last value as we overwrite it.
+			out[i] = out[i-1];
 		}
 	}
-	GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
+	out[0] = out[1]; // Align with first edited sample.
+	return 0;
+}
+
+int CmdDirectionalThreshold(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);
+
+	directionalThreshold(GraphBuffer, GraphBuffer,GraphTraceLen, upThres, downThres);
 	RepaintGraphWindow();
 	return 0;
 }
@@ -2386,13 +1607,209 @@ int Cmdhex2bin(const char *Cmd)
 	return 0;
 }
 
+	/* // example of FSK2 RF/50 Tones
+	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, // note one extra 1 to padd due to 50/8 remainder (1/2 the remainder)
+	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, // note one extra -1 to padd due to 50/8 remainder
+	};
+	*/
+void GetHiLoTone(int *LowTone, int *HighTone, int clk, int LowToneFC, int HighToneFC) {
+	int i,j=0;
+	int Left_Modifier = ((clk % LowToneFC) % 2) + ((clk % LowToneFC)/2);
+	int Right_Modifier = (clk % LowToneFC) / 2;
+	//int HighToneMod = clk mod HighToneFC;
+	int LeftHalfFCCnt = (LowToneFC % 2) + (LowToneFC/2); //truncate
+	int FCs_per_clk = clk/LowToneFC;
+	
+	// need to correctly split up the clock to field clocks.
+	// First attempt uses modifiers on each end to make up for when FCs don't evenly divide into Clk
+
+	// start with LowTone
+	// set extra 1 modifiers to make up for when FC doesn't divide evenly into Clk
+	for (i = 0; i < Left_Modifier; i++) {
+		LowTone[i] = 1;
+	}
+
+	// loop # of field clocks inside the main clock
+	for (i = 0; i < (FCs_per_clk); i++) {
+		// loop # of samples per field clock
+		for (j = 0; j < LowToneFC; j++) {
+			LowTone[(i*LowToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
+		}
+	}
+
+	int k;
+	// add last -1 modifiers
+	for (k = 0; k < Right_Modifier; k++) {
+		LowTone[((i-1)*LowToneFC)+Left_Modifier+j+k] = -1;
+	}
+
+	// now do hightone
+	Left_Modifier = ((clk % HighToneFC) % 2) + ((clk % HighToneFC)/2);
+	Right_Modifier = (clk % HighToneFC) / 2;
+	LeftHalfFCCnt = (HighToneFC % 2) + (HighToneFC/2); //truncate
+	FCs_per_clk = clk/HighToneFC;
+
+	for (i = 0; i < Left_Modifier; i++) {
+		HighTone[i] = 1;
+	}
+
+	// loop # of field clocks inside the main clock
+	for (i = 0; i < (FCs_per_clk); i++) {
+		// loop # of samples per field clock
+		for (j = 0; j < HighToneFC; j++) {
+			HighTone[(i*HighToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
+		}
+	}
+
+	// add last -1 modifiers
+	for (k = 0; k < Right_Modifier; k++) {
+		PrintAndLog("(i-1)*HighToneFC+lm+j+k %i",((i-1)*HighToneFC)+Left_Modifier+j+k);
+		HighTone[((i-1)*HighToneFC)+Left_Modifier+j+k] = -1;
+	}
+	if (g_debugMode == 2) {
+		for ( i = 0; i < clk; i++) {
+			PrintAndLog("Low: %i,  High: %i",LowTone[i],HighTone[i]);
+		}
+	}
+}
+
+//old CmdFSKdemod adapted by marshmellow 
+//converts FSK to clear NRZ style wave.  (or demodulates)
+int FSKToNRZ(int *data, int *dataLen, int clk, int LowToneFC, int HighToneFC) {
+	uint8_t ans=0;
+	if (clk == 0 || LowToneFC == 0 || HighToneFC == 0) {
+		int firstClockEdge=0;
+		ans = fskClocks((uint8_t *) &LowToneFC, (uint8_t *) &HighToneFC, (uint8_t *) &clk, false, &firstClockEdge);
+		if (g_debugMode	> 1) {
+			PrintAndLog	("DEBUG FSKtoNRZ: detected clocks: fc_low %i, fc_high %i, clk %i, firstClockEdge %i, ans %u", LowToneFC, HighToneFC, clk, firstClockEdge, ans);
+		}
+	}
+	// currently only know fsk modulations with field clocks < 10 samples and > 4 samples. filter out to remove false positives (and possibly destroying ask/psk modulated waves...)
+	if (ans == 0 || clk == 0 || LowToneFC == 0 || HighToneFC == 0 || LowToneFC > 10 || HighToneFC	< 4) {
+		if (g_debugMode	> 1) {
+			PrintAndLog	("DEBUG FSKtoNRZ: no fsk clocks found");
+		}
+		return 0;
+	}
+	int LowTone[clk];
+	int HighTone[clk];
+	GetHiLoTone(LowTone, HighTone, clk, LowToneFC, HighToneFC);
+	
+	int i, j;
+
+	// loop through ([all samples] - clk)
+	for (i = 0; i < *dataLen - clk; ++i) {
+		int lowSum = 0, highSum = 0;
+
+		// sum all samples together starting from this sample for [clk] samples for each tone (multiply tone value with sample data)
+		for (j = 0; j < clk; ++j) {
+			lowSum += LowTone[j] * data[i+j];
+			highSum += HighTone[j] * data[i + j];
+		}
+		// get abs( [average sample value per clk] * 100 )  (or a rolling average of sorts)
+		lowSum = abs(100 * lowSum / clk);
+		highSum = abs(100 * highSum / clk);
+		// save these back to buffer for later use
+		data[i] = (highSum << 16) | lowSum;
+	}
+
+	// now we have the abs( [average sample value per clk] * 100 ) for each tone
+	//   loop through again [all samples] - clk - 16  
+	//                  note why 16???  is 16 the largest FC? changed to LowToneFC as that should be the > fc
+	for(i = 0; i < *dataLen - clk - LowToneFC; ++i) {
+		int lowTot = 0, highTot = 0;
+
+		// sum a field clock width of abs( [average sample values per clk] * 100) for each tone
+		for (j = 0; j < LowToneFC; ++j) {  //10 for fsk2
+		  lowTot += (data[i + j] & 0xffff);
+		}
+		for (j = 0; j < HighToneFC; j++) {  //8 for fsk2
+		  highTot += (data[i + j] >> 16);
+		}
+
+		// subtract the sum of lowTone averages by the sum of highTone averages as it 
+		//   and write back the new graph value 
+		data[i] = lowTot - highTot;
+	}
+	// update dataLen to what we put back to the data sample buffer
+	*dataLen -= (clk + LowToneFC);
+	return 0;
+}
+
+int usage_data_fsktonrz() {
+		PrintAndLog("Usage: data fsktonrz c <clock> l <fc_low> f <fc_high>");
+		PrintAndLog("Options:        ");
+		PrintAndLog("       h            This help");
+		PrintAndLog("       c <clock>    enter the a clock (omit to autodetect)");
+		PrintAndLog("       l <fc_low>   enter a field clock (omit to autodetect)");
+		PrintAndLog("       f <fc_high>  enter a field clock (omit to autodetect)");
+		return 0;	
+}
+
+int CmdFSKToNRZ(const char *Cmd) {
+	// take clk, fc_low, fc_high 
+	//   blank = auto;
+	bool errors = false;
+	int clk = 0;
+	char cmdp = 0;
+	int fc_low = 10, fc_high = 8;
+	while(param_getchar(Cmd, cmdp) != 0x00)
+	{
+		switch(param_getchar(Cmd, cmdp))
+		{
+		case 'h':
+		case 'H':
+			return usage_data_fsktonrz();
+		case 'C':
+		case 'c':
+			clk = param_get32ex(Cmd, cmdp+1, 0, 10);
+			cmdp += 2;
+			break;
+		case 'F':
+		case 'f':
+			fc_high = param_get32ex(Cmd, cmdp+1, 0, 10);
+			cmdp += 2;
+			break;
+		case 'L':
+		case 'l':
+			fc_low = param_get32ex(Cmd, cmdp+1, 0, 10);
+			cmdp += 2;
+			break;
+		default:
+			PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
+			errors = true;
+			break;
+		}
+		if(errors) break;
+	}
+	//Validations
+	if(errors) return usage_data_fsktonrz();
+
+	setClockGrid(0,0);
+	DemodBufferLen = 0;
+	int ans = FSKToNRZ(GraphBuffer, &GraphTraceLen, clk, fc_low, fc_high);
+	CmdNorm("");
+	RepaintGraphWindow();
+	return ans;
+}
+
+
 static command_t CommandTable[] =
 {
 	{"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 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"},
@@ -2400,13 +1817,7 @@ static command_t CommandTable[] =
 	{"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"},
+	{"fsktonrz",        CmdFSKToNRZ,        1, "Convert fsk2 to nrz wave for alternate fsk demodulating (for weak fsk)"},
 	{"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"},
@@ -2416,12 +1827,11 @@ static command_t CommandTable[] =
 	{"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"},
+	{"mtrim",           CmdMtrim,           1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
 	{"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)"},