X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d6d20c543547d12eff81c5c3de254cf4b8650868..385f398740895f512abc90ea5a00a9be82bf115b:/client/graph.c

diff --git a/client/graph.c b/client/graph.c
index e03d1a51..95050f55 100644
--- a/client/graph.c
+++ b/client/graph.c
@@ -9,6 +9,7 @@
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>
+#include <stdbool.h>
 #include <string.h>
 #include "ui.h"
 #include "graph.h"
@@ -20,149 +21,64 @@ int GraphTraceLen;
 /* write a bit to the graph */
 void AppendGraph(int redraw, int clock, int bit)
 {
-	int i;
+  int i;
 
-	for (i = 0; i < (int)(clock / 2); ++i)
-		GraphBuffer[GraphTraceLen++] = bit ^ 1;
+  for (i = 0; i < (int)(clock / 2); ++i)
+    GraphBuffer[GraphTraceLen++] = bit ^ 1;
 
-	for (i = (int)(clock / 2); i < clock; ++i)
-		GraphBuffer[GraphTraceLen++] = bit;
+  for (i = (int)(clock / 2); i < clock; ++i)
+    GraphBuffer[GraphTraceLen++] = bit;
 
-	if (redraw)
-		RepaintGraphWindow();
+  if (redraw)
+    RepaintGraphWindow();
 }
 
-/* clear out our graph window */
+// clear out our graph window
 int ClearGraph(int redraw)
 {
-	int gtl = GraphTraceLen;
-	GraphTraceLen = 0;
+  int gtl = GraphTraceLen;
+  memset(GraphBuffer, 0x00, GraphTraceLen);
 
-	if (redraw)
-		RepaintGraphWindow();
+  GraphTraceLen = 0;
 
-	return gtl;
+  if (redraw)
+    RepaintGraphWindow();
+
+  return gtl;
 }
 
-/*
- * Detect clock rate
- */
- //decommissioned - has difficulty detecting rf/32
-/*
-int DetectClockOld(int peak)
-{
-	int i;
-	int clock = 0xFFFF;
-	int lastpeak = 0;
-
-	// Detect peak if we don't have one
-	if (!peak)
-		for (i = 0; i < GraphTraceLen; ++i)
-			if (GraphBuffer[i] > peak)
-				peak = GraphBuffer[i];
-
- // peak=(int)(peak*.75);
-	for (i = 1; i < GraphTraceLen; ++i)
-	{
-		// If this is the beginning of a peak
-		if (GraphBuffer[i - 1] != GraphBuffer[i] && GraphBuffer[i] >= peak)
-		{
-			// Find lowest difference between peaks
-			if (lastpeak && i - lastpeak < clock)
-				clock = i - lastpeak;
-			lastpeak = i;
-		}
-	}
+// DETECT CLOCK NOW IN LFDEMOD.C
 
-	return clock;
-}
-*/
-/*
-NOW IN LFDEMOD.C
-
-// by marshmellow
-// not perfect especially with lower clocks or VERY good antennas (heavy wave clipping)
-// maybe somehow adjust peak trimming value based on samples to fix?
-int DetectASKClock(int peak)
-{
-	int i=0;
-	int low=0;
-	int clk[]={16,32,40,50,64,100,128,256};
-	int loopCnt = 256;
-	if (GraphTraceLen<loopCnt) loopCnt = GraphTraceLen;
-	if (!peak){
-		for (i=0;i<loopCnt;++i){
-			if(GraphBuffer[i]>peak){
-				peak = GraphBuffer[i];
-			}
-			if(GraphBuffer[i]<low){
-				low = GraphBuffer[i];
-			}
-		}
-		peak=(int)(peak*.75);
-		low= (int)(low*.75);
-	}
-	int ii;
-	int clkCnt;
-	int tol = 0;
-	int bestErr=1000;
-	int errCnt[]={0,0,0,0,0,0,0,0};
-	for(clkCnt=0; clkCnt<6;++clkCnt){
-		if (clk[clkCnt]==32){
-			tol=1;
-		}else{
-			tol=0;
-		}
-		bestErr=1000;
-		for (ii=0; ii<loopCnt; ++ii){
-			if ((GraphBuffer[ii]>=peak) || (GraphBuffer[ii]<=low)){
-				 errCnt[clkCnt]=0;
-				for (i=0; i<((int)(GraphTraceLen/clk[clkCnt])-1); ++i){
-					if (GraphBuffer[ii+(i*clk[clkCnt])]>=peak || GraphBuffer[ii+(i*clk[clkCnt])]<=low){
-					}else if(GraphBuffer[ii+(i*clk[clkCnt])-tol]>=peak || GraphBuffer[ii+(i*clk[clkCnt])-tol]<=low){
-					}else if(GraphBuffer[ii+(i*clk[clkCnt])+tol]>=peak || GraphBuffer[ii+(i*clk[clkCnt])+tol]<=low){
-					}else{  //error no peak detected
-						errCnt[clkCnt]++;
-					}
-				}
-				if(errCnt[clkCnt]==0) return clk[clkCnt];
-				if(errCnt[clkCnt]<bestErr) bestErr=errCnt[clkCnt];
-			}
-		}
-	}
-	int iii=0;
-	int best=0;
-	for (iii=0; iii<6;++iii){
-		if (errCnt[iii]<errCnt[best]){
-			best = iii;
-		}
-	}
-	// PrintAndLog("DEBUG: clkCnt: %d, ii: %d, i: %d peak: %d, low: %d, errcnt: %d, errCnt64: %d",clkCnt,ii,i,peak,low,errCnt[best],errCnt[4]);
-	return clk[best];
-}
-*/
 void setGraphBuf(uint8_t *buff, size_t size)
 {
-	int i=0;
-	ClearGraph(0);
-	for (; i < size; ++i){
+	if ( buff == NULL ) return;
+	
+	uint16_t i = 0;  
+	if ( size > MAX_GRAPH_TRACE_LEN )
+		size = MAX_GRAPH_TRACE_LEN;
+  ClearGraph(0);
+  for (; i < size; ++i){
 		GraphBuffer[i]=buff[i]-128;
-	}
-	GraphTraceLen=size;
-	RepaintGraphWindow();
-	return;
+  }
+  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;
+	if ( buff == NULL ) return 0;
+	
+  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 */
+
+
+// Get or auto-detect clock rate
 int GetClock(const char *str, int peak, int verbose)
 {
 	int clock;
@@ -170,21 +86,56 @@ int GetClock(const char *str, int peak, int verbose)
 	if (!strcmp(str, ""))
 		clock = 0;
 
-	/* Auto-detect clock */
+	// Auto-detect clock
 	if (!clock)
 	{
 		uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
 		size_t size = getFromGraphBuf(grph);
+		if ( size == 0 ) {
+			PrintAndLog("Failed to copy from graphbuffer");
+			return -1;
+		}
 		clock = DetectASKClock(grph,size,0);
-		/* Only print this message if we're not looping something */
+		// Only print this message if we're not looping something
 		if (!verbose){
 			PrintAndLog("Auto-detected clock rate: %d", clock);
 		}
 	}
-
 	return clock;
 }
 
+// A simple test to see if there is any data inside Graphbuffer. 
+bool HasGraphData(){
+
+	if ( GraphTraceLen <= 0) {
+		PrintAndLog("No data available, try reading something first");
+		return false;
+	}
+	return true;	
+}
+
+// Detect high and lows in Grapbuffer.
+// Only loops the first 256 values. 
+void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
+
+	uint8_t loopMax = 255;
+	if ( loopMax > GraphTraceLen)
+		loopMax = GraphTraceLen;
+  
+	for (uint8_t i = 0; i < loopMax; ++i) {
+		if (GraphBuffer[i] > *high)
+			*high = GraphBuffer[i];
+		else if (GraphBuffer[i] < *low)
+			*low = GraphBuffer[i];
+	}
+	
+	//12% fuzz in case highs and lows aren't clipped
+	if (addFuzz) {
+		*high = (int)(*high * .88);
+		*low  = (int)(*low  * .88);
+	}
+}
+
 int GetNRZpskClock(const char *str, int peak, int verbose)
 {
 	int clock;
@@ -197,6 +148,10 @@ int GetNRZpskClock(const char *str, int peak, int verbose)
 	{
 		uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
 		size_t size = getFromGraphBuf(grph);
+		if ( size == 0 ) {
+			PrintAndLog("Failed to copy from graphbuffer");
+			return -1;
+		}
 		clock = DetectpskNRZClock(grph,size,0);
 		// Only print this message if we're not looping something
 		if (!verbose){