X-Git-Url: http://cvs.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c12512e99ad08689e171e80a01f7148e55ee64e1..385f398740895f512abc90ea5a00a9be82bf115b:/client/graph.c

diff --git a/client/graph.c b/client/graph.c
index 9079e073..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"
@@ -20,53 +21,63 @@ 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
 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 NOW IN LFDEMOD.C
 
 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
 int GetClock(const char *str, int peak, int verbose)
 {
@@ -80,16 +91,51 @@ int GetClock(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 = 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;
 }
 
+// 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;
@@ -102,6 +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){