proxmark3/client/graph.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.
//-----------------------------------------------------------------------------
// Graph utilities
//-----------------------------------------------------------------------------

#include <stdio.h>
#include <string.h>
#include "ui.h"
#include "graph.h"
#include "lfdemod.h"

int GraphBuffer[MAX_GRAPH_TRACE_LEN];
int GraphTraceLen;

/* write a bit to the graph */
void AppendGraph(int redraw, int clock, int bit)
{
	int i;

	for (i = 0; i < (int)(clock / 2); ++i)
		GraphBuffer[GraphTraceLen++] = bit ^ 1;

	for (i = (int)(clock / 2); i < clock; ++i)
		GraphBuffer[GraphTraceLen++] = bit;

	if (redraw)
		RepaintGraphWindow();
}

// clear out our graph window
int ClearGraph(int redraw)
{
	int gtl = GraphTraceLen;
	GraphTraceLen = 0;

	if (redraw)
		RepaintGraphWindow();

	return gtl;
}

// DETECT CLOCK NOW IN LFDEMOD.C

void setGraphBuf(uint8_t *buff, size_t size)
{
	int i=0;
	ClearGraph(0);
	for (; i < size; ++i){
		GraphBuffer[i]=buff[i]-128;
	}
	GraphTraceLen=size;
	RepaintGraphWindow();
	return;
}
size_t getFromGraphBuf(uint8_t *buff)
{
	uint32_t i;
	for (i=0;i<GraphTraceLen;++i){
		if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
		if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
		buff[i]=(uint8_t)(GraphBuffer[i]+128);
	}
	return i;
}
// Get or auto-detect clock rate
int GetClock(const char *str, int peak, int verbose)
{
	int clock;
	sscanf(str, "%i", &clock);
	if (!strcmp(str, ""))
		clock = 0;

	// Auto-detect clock
	if (!clock)
	{
		uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
		size_t size = getFromGraphBuf(grph);
		clock = DetectASKClock(grph,size,0);
		// Only print this message if we're not looping something
		if (!verbose){
			PrintAndLog("Auto-detected clock rate: %d", clock);
		}
	}

	return clock;
}

int GetNRZpskClock(const char *str, int peak, int verbose)
{
	int clock;
	sscanf(str, "%i", &clock);
	if (!strcmp(str, ""))
		clock = 0;

	// Auto-detect clock
	if (!clock)
	{
		uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
		size_t size = getFromGraphBuf(grph);
		clock = DetectpskNRZClock(grph,size,0);
		// Only print this message if we're not looping something
		if (!verbose){
			PrintAndLog("Auto-detected clock rate: %d", clock);
		}
	}
	return clock;
}