X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/e4691591454edf2c11697096ea72d650a7dbda79..a1557c4c2f3905fd760dbac16cba5be890948634:/client/graph.c

diff --git a/client/graph.c b/client/graph.c
index 6362c8fe..0f998fe1 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"
@@ -50,7 +51,11 @@ int ClearGraph(int redraw)
 
 void setGraphBuf(uint8_t *buff, size_t size)
 {
-  int i=0;
+	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;
@@ -61,6 +66,8 @@ void setGraphBuf(uint8_t *buff, size_t size)
 }
 size_t getFromGraphBuf(uint8_t *buff)
 {
+	if ( buff == NULL ) return -1;
+	
   uint32_t i;
   for (i=0;i<GraphTraceLen;++i){
     if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
@@ -82,16 +89,50 @@ 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;
@@ -111,4 +152,4 @@ int GetNRZpskClock(const char *str, int peak, int verbose)
 		}
 	}
 	return clock;
-}
+}
\ No newline at end of file