[proxmark3-svn] / client / cmddata.c

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

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "proxmark3.h"
#include "data.h"
#include "ui.h"
#include "graph.h"
#include "cmdparser.h"
#include "util.h"
#include "cmdmain.h"
#include "cmddata.h"
#include "lfdemod.h"
uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
int DemodBufferLen;
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,int size)
{
	int i=0;
	for (; i < size; ++i){
		DemodBuffer[i]=buff[i];
	}
	DemodBufferLen=size;
	return;
}

//by marshmellow
void printDemodBuff()
{
	uint32_t i = 0;
	int bitLen = DemodBufferLen;
	if (bitLen<16) {
		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
	for (i = 0; i <= (bitLen-16); i+=16) {
		PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
			DemodBuffer[i],
			DemodBuffer[i+1],
			DemodBuffer[i+2],
			DemodBuffer[i+3],
			DemodBuffer[i+4],
			DemodBuffer[i+5],
			DemodBuffer[i+6],
			DemodBuffer[i+7],
			DemodBuffer[i+8],
			DemodBuffer[i+9],
			DemodBuffer[i+10],
			DemodBuffer[i+11],
			DemodBuffer[i+12],
			DemodBuffer[i+13],
			DemodBuffer[i+14],
			DemodBuffer[i+15]);
	}
	return;
}


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;
}

/*
 * 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
 */
 //this method is dependant on all highs and lows to be the same(or clipped)  this creates issues[marshmellow] it also ignores the clock
int Cmdaskdemod(const char *Cmd)
{
	int i;
	int c, high = 0, low = 0;

	// TODO: complain if we do not give 2 arguments here !
	// (AL - this doesn't make sense! we're only using one argument!!!)
	sscanf(Cmd, "%i", &c);

	/* Detect high and lows and clock */
	// (AL - clock???)
	for (i = 0; i < GraphTraceLen; ++i)
	{
		if (GraphBuffer[i] > high)
			high = GraphBuffer[i];
		else if (GraphBuffer[i] < low)
			low = GraphBuffer[i];
	}
	high=abs(high*.75);
	low=abs(low*.75);
	if (c != 0 && c != 1) {
		PrintAndLog("Invalid argument: %s", Cmd);
		return 0;
	}
	//prime loop
	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)
		 */
		//[marhsmellow] change == to >= for high and <= for low for fuzz
		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;
}

//by marshmellow
void printBitStream(uint8_t BitStream[], uint32_t bitLen)
{
	uint32_t i = 0;
	if (bitLen<16) {
		PrintAndLog("Too few bits found: %d",bitLen);
		return;
	}
	if (bitLen>512) bitLen=512;
	 for (i = 0; i <= (bitLen-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;
}
//by marshmellow
//print EM410x ID in multiple formats
void printEM410x(uint64_t id)
{
	if (id !=0){
			uint64_t iii=1;
			uint64_t id2lo=0; //id2hi=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)));
				}
			}
			//output em id
			PrintAndLog("EM TAG ID    : %010llx", id);
			PrintAndLog("Unique TAG ID: %010llx",  id2lo); //id2hi,
			PrintAndLog("DEZ 8        : %08lld",id & 0xFFFFFF);
			PrintAndLog("DEZ 10       : %010lld",id & 0xFFFFFF);
			PrintAndLog("DEZ 5.5      : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
			PrintAndLog("DEZ 3.5A     : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
			PrintAndLog("DEZ 14/IK2   : %014lld",id);
			PrintAndLog("DEZ 15/IK3   : %015lld",id2lo);
			PrintAndLog("Other        : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
		}
		return;
}

//by marshmellow
//take binary from demod buffer and see if we can find an EM410x ID
int CmdEm410xDecode(const char *Cmd)
{
	uint64_t id=0;
 // uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
 // uint32_t i=0;
 // i=getFromGraphBuf(BitStream);
	id = Em410xDecode(DemodBuffer,DemodBufferLen);
	printEM410x(id);
	if (id>0) return 1;
	return 0;
}


//by marshmellow
//takes 2 arguments - clock and invert both as integers
//attempts to demodulate ask while decoding manchester
//prints binary found and saves in graphbuffer for further commands
int Cmdaskmandemod(const char *Cmd)
{
	int invert=0;
	int clk=0;
	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	sscanf(Cmd, "%i %i", &clk, &invert);
	if (invert != 0 && invert != 1) {
		PrintAndLog("Invalid argument: %s", Cmd);
		return 0;
	}

	size_t BitLen = getFromGraphBuf(BitStream);
	//  PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
	int errCnt=0;
	 errCnt = askmandemod(BitStream, &BitLen,&clk,&invert);
	if (errCnt<0||BitLen<16){  //if fatal error (or -1)
		// PrintAndLog("no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
		return 0;
	}
	PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,BitLen);

	//output
	if (errCnt>0){
		PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
	}
	PrintAndLog("ASK/Manchester decoded bitstream:");
	// Now output the bitstream to the scrollback by line of 16 bits
	setDemodBuf(BitStream,BitLen);
	printDemodBuff();
	uint64_t lo =0;
	lo = Em410xDecode(BitStream,BitLen);
	if (lo>0){
		//set GraphBuffer for clone or sim command
		PrintAndLog("EM410x pattern found: ");
		printEM410x(lo);
		return 1;
	}
	//if (BitLen>16) return 1;
	return 0;
}

//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;
	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>1 || low <0 ){
		PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode");
		return 0;
	}
	size=i;
	errCnt=manrawdecode(BitStream, &size);
	if (errCnt>=20){
		PrintAndLog("Too many errors: %d",errCnt);
		return 0;
	}
	PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
	printBitStream(BitStream, size);
	if (errCnt==0){
		uint64_t id = 0;
		id = Em410xDecode(BitStream, size);
		if (id>0) setDemodBuf(BitStream, size);
		printEM410x(id);
	}
	return 1;
}

//by marshmellow
//biphase decode
//take 01 or 10 = 0 and 11 or 00 = 1
//takes 1 argument "offset" default = 0 if 1 it will shift the decode by one bit
//  since it is not like manchester and doesn't have an incorrect bit pattern we
//  cannot determine if our decode is correct or if it should be shifted by one bit
//  the argument offset allows us to manually shift if the output is incorrect
//  (better would be to demod and decode at the same time so we can distinguish large
//    width waves vs small width waves to help the decode positioning) or askbiphdemod
int CmdBiphaseDecodeRaw(const char *Cmd)
{
	int i = 0;
	int errCnt=0;
	size_t size=0;
	int offset=0;
	int high=0, low=0;
	sscanf(Cmd, "%i", &offset);
	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	//get graphbuffer & high and low
	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>1 || low <0){
		PrintAndLog("Error: please raw demod the wave first then decode");
		return 0;
	}
	size=i;
	errCnt=BiphaseRawDecode(BitStream, &size, offset);
	if (errCnt>=20){
		PrintAndLog("Too many errors attempting to decode: %d",errCnt);
		return 0;
	}
	PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
	printBitStream(BitStream, size);
	PrintAndLog("\nif bitstream does not look right try offset=1");
	return 1;
}


//by marshmellow
//takes 2 arguments - clock and invert both as integers
//attempts to demodulate ask only
//prints binary found and saves in graphbuffer for further commands
int Cmdaskrawdemod(const char *Cmd)
{
	int invert=0;
	int clk=0;
	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	sscanf(Cmd, "%i %i", &clk, &invert);
	if (invert != 0 && invert != 1) {
		PrintAndLog("Invalid argument: %s", Cmd);
		return 0;
	}
	size_t BitLen = getFromGraphBuf(BitStream);
	int errCnt=0;
	errCnt = askrawdemod(BitStream, &BitLen,&clk,&invert);
	if (errCnt==-1||BitLen<16){  //throw away static - allow 1 and -1 (in case of threshold command first)
		PrintAndLog("no data found");
		return 0;
	}
	PrintAndLog("Using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
		//PrintAndLog("Data start pos:%d, lastBit:%d, stop pos:%d, numBits:%d",iii,lastBit,i,bitnum);
		//move BitStream back to DemodBuffer
	setDemodBuf(BitStream,BitLen);

		//output
	if (errCnt>0){
		PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
	}
	PrintAndLog("ASK demoded bitstream:");
	// Now output the bitstream to the scrollback by line of 16 bits
	printBitStream(BitStream,BitLen);

	return 1;
}

int CmdAutoCorr(const char *Cmd)
{
	static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];

	int window = atoi(Cmd);

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

	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;
	}
	GraphTraceLen = GraphTraceLen - window;
	memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));

	RepaintGraphWindow();
	return 0;
}

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;
}

/*
 * 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;
		}

		/* If we didn't hit both high and low peaks, we had a bit transition */
		if (!hithigh || !hitlow)
			bit ^= 1;

		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;
	}

	RepaintGraphWindow();
	return 0;
}

int CmdBuffClear(const char *Cmd)
{
	UsbCommand c = {CMD_BUFF_CLEAR};
	SendCommand(&c);
	ClearGraph(true);
	return 0;
}

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;
}

/* Print our clock rate */
// uses data from graphbuffer
int CmdDetectClockRate(const char *Cmd)
{
	GetClock("",0,0);
	//int clock = DetectASKClock(0);
	//PrintAndLog("Auto-detected clock rate: %d", clock);
	return 0;
}

//by marshmellow
//fsk raw demod and print binary
//takes 4 arguments - Clock, invert, rchigh, rclow
//defaults: clock = 50, invert=0, rchigh=10, rclow=8 (RF/10 RF/8 (fsk2a))
int CmdFSKrawdemod(const char *Cmd)
{
	//raw fsk demod  no manchester decoding no start bit finding just get binary from wave
	//set defaults
	int rfLen = 50;
	int invert=0;
	int fchigh=10;
	int fclow=8;
	//set options from parameters entered with the command
	sscanf(Cmd, "%i %i %i %i", &rfLen, &invert, &fchigh, &fclow);

	if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
		 //rfLen=param_get8(Cmd, 0); //if rfLen option only is used
		 if (rfLen==1){
			invert=1;   //if invert option only is used
			rfLen = 50;
		 } else if(rfLen==0) rfLen=50;
	}
	PrintAndLog("Args invert: %d - Clock:%d - fchigh:%d - fclow: %d",invert,rfLen,fchigh, fclow);
	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	size_t BitLen = getFromGraphBuf(BitStream);
	int size  = fskdemod(BitStream,BitLen,(uint8_t)rfLen,(uint8_t)invert,(uint8_t)fchigh,(uint8_t)fclow);
	if (size>0){
		PrintAndLog("FSK decoded bitstream:");
		setDemodBuf(BitStream,size);

		// Now output the bitstream to the scrollback by line of 16 bits
		if(size > (8*32)+2) size = (8*32)+2; //only output a max of 8 blocks of 32 bits  most tags will have full bit stream inside that sample size
		printBitStream(BitStream,size);
	} else{
		PrintAndLog("no FSK data found");
	}
	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);
	//get binary from fsk wave
	size_t size  = HIDdemodFSK(BitStream,BitLen,&hi2,&hi,&lo);
	if (size<0){
		PrintAndLog("Error demoding fsk");
		return 0;
	}
	if (hi2==0 && hi==0 && lo==0) 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);
		setDemodBuf(BitStream,BitLen);
		return 1;
	}
	else {  //standard HID tags <38 bits
		//Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd
		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 & 15) << 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==37){
				cardnum = (lo>>1)&0x7FFFF;
				fc = ((hi&0xF)<<12)|(lo>>20);
			}
			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);
		return 1;
	}
	return 0;
}

//by marshmellow
//IO-Prox demod - FSK RF/64 with preamble of 000000001
//print ioprox ID and some format details
int CmdFSKdemodIO(const char *Cmd)
{
	//raw fsk demod no manchester decoding no start bit finding just get binary from wave
	//set defaults
	int idx=0;
	//something in graphbuffer
	if (GraphTraceLen < 65) return 0;
	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	size_t BitLen = getFromGraphBuf(BitStream);
	//get binary from fsk wave
	// PrintAndLog("DEBUG: got buff");
	idx = IOdemodFSK(BitStream,BitLen);
	if (idx<0){
		//PrintAndLog("Error demoding fsk");
		return 0;
	}
	// PrintAndLog("DEBUG: Got IOdemodFSK");
	if (idx==0){
		//PrintAndLog("IO Prox Data not found - FSK Data:");
		//if (BitLen > 92) printBitStream(BitStream,92);
		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) 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
	PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
	int i;
	for (i=0;i<64;++i)
		DemodBuffer[i]=BitStream[idx++];

	DemodBufferLen=64;
	return 1;
}
int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
{
	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; //if highlen > lowLen then highlen else 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) (HID ONLY)
	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;
		}
	}

	// place start of bit sync marker in graph
	GraphBuffer[maxPos] = maxMark;
	GraphBuffer[maxPos + 1] = minMark;

	maxPos += j;

	// place end of bit sync marker in graph
	GraphBuffer[maxPos] = maxMark;
	GraphBuffer[maxPos+1] = minMark;

	PrintAndLog("actual data bits start at sample %d", maxPos);
	PrintAndLog("length %d/%d", highLen, lowLen);

	uint8_t bits[46];
	bits[sizeof(bits)-1] = '\0';

	// 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;
}

int CmdDetectNRZpskClockRate(const char *Cmd)
{
	GetNRZpskClock("",0,0);
	return 0;
}

int PSKnrzDemod(const char *Cmd){
	int invert=0;
	int clk=0;
	sscanf(Cmd, "%i %i", &clk, &invert);
	if (invert != 0 && invert != 1) {
		PrintAndLog("Invalid argument: %s", Cmd);
		return -1;
	}
	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
	size_t BitLen = getFromGraphBuf(BitStream);
	int errCnt=0;
	errCnt = pskNRZrawDemod(BitStream, &BitLen,&clk,&invert);
	if (errCnt<0|| BitLen<16){  //throw away static - allow 1 and -1 (in case of threshold command first)
		//PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
		return -1;
	}
	PrintAndLog("Tried PSK/NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);

	//prime demod buffer for output
	setDemodBuf(BitStream,BitLen);
	return errCnt;
}
// 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=PSKnrzDemod(Cmd);
	else
		ans=PSKnrzDemod("32");

	if (ans < 0){
		PrintAndLog("Error1: %d",ans);
		return 0;
	}
	uint8_t invert=0;
	ans = indala26decode(DemodBuffer,(size_t *) &DemodBufferLen, &invert);
	if (ans < 1) {
		PrintAndLog("Error2: %d",ans);
		return -1;
	}
	char showbits[251];
	if(invert==1) PrintAndLog("Had to invert bits");
	//convert UID to HEX
	uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
	int idx;
	uid1=0;
	uid2=0;
	PrintAndLog("BitLen: %d",DemodBufferLen);
	if (DemodBufferLen==64){
		for( idx=0; idx<64; idx++) {
			uid1=(uid1<<1)|(uid2>>31);
			if (DemodBuffer[idx] == 0) {
				uid2=(uid2<<1)|0;
				showbits[idx]='0';
			} else {
				uid2=(uid2<<1)|1;
				showbits[idx]='1';
			}
		}
		showbits[idx]='\0';
		PrintAndLog("Indala UID=%s (%x%08x)", showbits, uid1, uid2);
	}
	else {
		uid3=0;
		uid4=0;
		uid5=0;
		uid6=0;
		uid7=0;
		for( idx=0; idx<DemodBufferLen; idx++) {
			uid1=(uid1<<1)|(uid2>>31);
			uid2=(uid2<<1)|(uid3>>31);
			uid3=(uid3<<1)|(uid4>>31);
			uid4=(uid4<<1)|(uid5>>31);
			uid5=(uid5<<1)|(uid6>>31);
			uid6=(uid6<<1)|(uid7>>31);
			if (DemodBuffer[idx] == 0) {
				uid7=(uid7<<1)|0;
				showbits[idx]='0';
			}
			else {
				uid7=(uid7<<1)|1;
				showbits[idx]='1';
			}
		}
		showbits[idx]='\0';
		PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
	}
	return 1;
}

int CmdPskClean(const char *Cmd)
{
	uint8_t bitStream[MAX_GRAPH_TRACE_LEN]={0};
	size_t bitLen = getFromGraphBuf(bitStream);
	pskCleanWave(bitStream, bitLen);
	setGraphBuf(bitStream, bitLen);
	return 0;
}

//by marshmellow
//takes 2 arguments - clock and invert both as integers
//attempts to demodulate ask only
//prints binary found and saves in graphbuffer for further commands
int CmdpskNRZrawDemod(const char *Cmd)
{
	int errCnt= PSKnrzDemod(Cmd);
	//output
	if (errCnt<0) return 0;
	if (errCnt>0){
		PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
	}
	PrintAndLog("PSK or NRZ demoded bitstream:");
	// Now output the bitstream to the scrollback by line of 16 bits
	printDemodBuff();

	return 1;
}

int CmdGrid(const char *Cmd)
{
	sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
	PlotGridXdefault= PlotGridX;
	PlotGridYdefault= PlotGridY;
	RepaintGraphWindow();
	return 0;
}

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 CmdHide(const char *Cmd)
{
	HideGraphWindow();
	return 0;
}

int CmdHpf(const char *Cmd)
{
	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;

	RepaintGraphWindow();
	return 0;
}

int CmdSamples(const char *Cmd)
{
	uint8_t got[40000];

	int n = strtol(Cmd, NULL, 0);
	if (n == 0)
		n = 20000;

	if (n > sizeof(got))
		n = sizeof(got);

	PrintAndLog("Reading %d samples from device memory\n", n);
	GetFromBigBuf(got,n,0);
	WaitForResponse(CMD_ACK,NULL);
	for (int j = 0; j < n; j++) {
		GraphBuffer[j] = ((int)got[j]) - 128;
	}
	GraphTraceLen = n;
	RepaintGraphWindow();
	return 0;
}

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

	UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING};
	SendCommand(&c);

	UsbCommand resp;
	while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
		timeout++;
		printf(".");
		if (timeout > 7) {
			PrintAndLog("\nNo response from Proxmark. Aborting...");
			return 1;
		}
	}

	int peakv, peakf;
	int vLf125, vLf134, vHf;
	vLf125 = resp.arg[0] & 0xffff;
	vLf134 = resp.arg[0] >> 16;
	vHf = resp.arg[1] & 0xffff;;
	peakf = resp.arg[2] & 0xffff;
	peakv = resp.arg[2] >> 16;
	PrintAndLog("");
	PrintAndLog("# LF antenna: %5.2f V @   125.00 kHz", vLf125/1000.0);
	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)
		PrintAndLog("# Your LF antenna is unusable.");
	else if (peakv<10000)
		PrintAndLog("# Your LF antenna is marginal.");
	if (vHf<2000)
		PrintAndLog("# Your HF antenna is unusable.");
	else if (vHf<5000)
		PrintAndLog("# Your HF antenna is marginal.");

	for (int i = 0; i < 256; i++) {
		GraphBuffer[i] = resp.d.asBytes[i] - 128;
	}

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

  return 0;
}


int CmdLoad(const char *Cmd)
{
	FILE *f = fopen(Cmd, "r");
	if (!f) {
		PrintAndLog("couldn't open '%s'", Cmd);
		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 ds = atoi(Cmd);

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

	RepaintGraphWindow();
	return 0;
}
int CmdRtrim(const char *Cmd)
{
	int ds = atoi(Cmd);

	GraphTraceLen = ds;

	RepaintGraphWindow();
	return 0;
}

/*
 * 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] = {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];
	}

	/* 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)
	{
		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;
					}
				}
			}
		}

		// 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
		for (i = 0; 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 0;
}

/* Modulate our data into manchester */
int CmdManchesterMod(const char *Cmd)
{
	int i, j;
	int clock;
	int bit, lastbit, wave;

	/* Get our clock */
	clock = GetClock(Cmd, 0, 1);

	wave = 0;
	lastbit = 1;
	for (i = 0; i < (int)(GraphTraceLen / clock); i++)
	{
		bit = GraphBuffer[i * clock] ^ 1;

		for (j = 0; j < (int)(clock/2); j++)
			GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave;
		for (j = (int)(clock/2); 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;
}

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];
	}

	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)
{
	ShowGraphWindow();
	return 0;
}

int CmdSave(const char *Cmd)
{
	FILE *f = fopen(Cmd, "w");
	if(!f) {
		PrintAndLog("couldn't open '%s'", Cmd);
		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 CmdThreshold(const char *Cmd)
{
	int threshold = atoi(Cmd);

	for (int i = 0; i < GraphTraceLen; ++i) {
		if (GraphBuffer[i] >= threshold)
			GraphBuffer[i] = 1;
		else
			GraphBuffer[i] = -1;
	}
	RepaintGraphWindow();
	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);

	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 CmdZerocrossings(const char *Cmd)
{
	// 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 or 1> -- Attempt to demodulate simple ASK tags"},
	{"askmandemod",   Cmdaskmandemod,     1, "[clock] [invert<0|1>] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional[clock will try Auto-detect])"},
	{"askrawdemod",   Cmdaskrawdemod,     1, "[clock] [invert<0|1>] -- Attempt to demodulate ASK tags and output binary (args optional[clock will try Auto-detect])"},
	{"autocorr",      CmdAutoCorr,        1, "<window length> -- Autocorrelation over window"},
	{"biphaserawdecode",CmdBiphaseDecodeRaw,1,"[offset] Biphase decode binary stream already in graph buffer (offset = bit to start decode from)"},
	{"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 ASK clock rate"},
	{"fskdemod",      CmdFSKdemod,        1, "Demodulate graph window as a HID FSK"},
	{"fskhiddemod",   CmdFSKdemodHID,     1, "Demodulate graph window as a HID FSK using raw"},
	{"fskiodemod",    CmdFSKdemodIO,      1, "Demodulate graph window as an IO Prox FSK using raw"},
	{"fskrawdemod",   CmdFSKrawdemod,     1, "[clock rate] [invert] [rchigh] [rclow] Demodulate graph window from FSK to binary (clock = 50)(invert = 1|0)(rchigh = 10)(rclow=8)"},
	{"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"},
	{"rtrim",         CmdRtrim,           1, "<location to end trace> -- Trim samples from right of trace"},
	{"mandemod",      CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"},
	{"manrawdecode",  Cmdmandecoderaw,    1, "Manchester decode binary stream already in graph buffer"},
	{"manmod",        CmdManchesterMod,   1, "[clock rate] -- Manchester modulate a binary stream"},
	{"norm",          CmdNorm,            1, "Normalize max/min to +/-128"},
	{"plot",          CmdPlot,            1, "Show graph window (hit 'h' in window for keystroke help)"},
	{"pskclean",      CmdPskClean,        1, "Attempt to clean psk wave"},
	{"pskdetectclock",CmdDetectNRZpskClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"},
	{"pskindalademod",CmdIndalaDecode,    1, "[clock] [invert<0|1>] -- Attempt to demodulate psk indala tags and output ID binary & hex (args optional[clock will try Auto-detect])"},
	{"psknrzrawdemod",CmdpskNRZrawDemod,  1, "[clock] [invert<0|1>] -- Attempt to demodulate psk or nrz tags and output binary (args optional[clock will try Auto-detect])"},
	{"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"},
	{"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"},
	{"zerocrossings", CmdZerocrossings,   1, "Count time between zero-crossings"},
	{NULL, NULL, 0, NULL}
};

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

int CmdHelp(const char *Cmd)
{
	CmdsHelp(CommandTable);
	return 0;
}