X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/d889dacc9d6a45b41deca907042d97221a06e9a5..9fe4507c03c26715b532b4ceb1f46e8198ecd4c9:/client/graph.c?ds=inline

diff --git a/client/graph.c b/client/graph.c
index 319cde39..547e9b30 100644
--- a/client/graph.c
+++ b/client/graph.c
@@ -14,9 +14,13 @@
 #include "ui.h"
 #include "graph.h"
 #include "lfdemod.h"
+#include "cmddata.h" //for g_debugmode
 
 int GraphBuffer[MAX_GRAPH_TRACE_LEN];
 int GraphTraceLen;
+
+int s_Buff[MAX_GRAPH_TRACE_LEN];
+
 /* write a manchester bit to the graph */
 void AppendGraph(int redraw, int clock, int bit)
 {
@@ -143,13 +147,16 @@ int GetAskClock(const char str[], bool printAns, bool verbose)
 			PrintAndLog("Failed to copy from graphbuffer");
 		return -1;
 	}
-	bool st = DetectST(grph, &size, &clock);
-	int start = 0;
+	//, size_t *ststart, size_t *stend
+	size_t ststart = 0, stend = 0;
+	bool st = DetectST(grph, &size, &clock, &ststart, &stend);
+	int start = stend;
 	if (st == false) {
 		start = DetectASKClock(grph, size, &clock, 20);
 	}
+	setClockGrid(clock, start);
 	// Only print this message if we're not looping something
-	if (printAns) {
+	if (printAns || g_debugMode) {
 		PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
 	}
 	return clock;
@@ -165,11 +172,12 @@ uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
 			PrintAndLog("Failed to copy from graphbuffer");
 		return 0;
 	}
-	//uint8_t countPSK_FC(uint8_t *BitStream, size_t size)
-
-	carrier = countFC(grph,size,0);
+	uint16_t fc = countFC(grph,size,0);
+	carrier = fc & 0xFF;
+	if (carrier != 2 && carrier != 4 && carrier != 8) return 0;
+	if ((fc>>8) == 10 && carrier == 8) return 0;
 	// Only print this message if we're not looping something
-	if (printAns){
+	if (printAns) {
 		PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
 	}
 	return carrier;
@@ -192,7 +200,10 @@ int GetPskClock(const char str[], bool printAns, bool verbose)
 			PrintAndLog("Failed to copy from graphbuffer");
 		return -1;
 	}
-	clock = DetectPSKClock(grph,size,0);
+	size_t firstPhaseShiftLoc = 0;
+	uint8_t curPhase = 0, fc = 0;
+	clock = DetectPSKClock(grph, size, 0, &firstPhaseShiftLoc, &curPhase, &fc);
+	setClockGrid(clock, firstPhaseShiftLoc);
 	// Only print this message if we're not looping something
 	if (printAns){
 		PrintAndLog("Auto-detected clock rate: %d", clock);
@@ -217,7 +228,9 @@ uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
 			PrintAndLog("Failed to copy from graphbuffer");
 		return -1;
 	}
-	clock = DetectNRZClock(grph, size, 0);
+	size_t clkStartIdx = 0;
+	clock = DetectNRZClock(grph, size, 0, &clkStartIdx);
+	setClockGrid(clock, clkStartIdx);
 	// Only print this message if we're not looping something
 	if (printAns){
 		PrintAndLog("Auto-detected clock rate: %d", clock);
@@ -236,10 +249,12 @@ uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
 
 
 	uint8_t fc1=0, fc2=0, rf1=0;
-	uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
+	int firstClockEdge = 0;
+	uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose, &firstClockEdge);
 	if (ans == 0) return 0;
 	if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
 		if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
+		setClockGrid(rf1, firstClockEdge);
 		return rf1;
 	}
 	if (verbose){
@@ -248,23 +263,87 @@ uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
 	}
 	return 0;
 }
-uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose)
+uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose, int *firstClockEdge)
 {
 	uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
 	size_t size = getFromGraphBuf(BitStream);
 	if (size==0) return 0;
 	uint16_t ans = countFC(BitStream, size, 1); 
 	if (ans==0) {
-		if (verbose) PrintAndLog("DEBUG: No data found");
+		if (verbose || g_debugMode) PrintAndLog("DEBUG: No data found");
 		return 0;
 	}
 	*fc1 = (ans >> 8) & 0xFF;
 	*fc2 = ans & 0xFF;
-
-	*rf1 = detectFSKClk(BitStream, size, *fc1, *fc2);
+	//int firstClockEdge = 0;
+	*rf1 = detectFSKClk(BitStream, size, *fc1, *fc2, firstClockEdge);
 	if (*rf1==0) {
-		if (verbose) PrintAndLog("DEBUG: Clock detect error");
+		if (verbose || g_debugMode) PrintAndLog("DEBUG: Clock detect error");
 		return 0;
 	}
 	return 1;
 }
+bool graphJustNoise(int *BitStream, int size)
+{
+	static const uint8_t THRESHOLD = 15; //might not be high enough for noisy environments
+	//test samples are not just noise
+	bool justNoise1 = 1;
+	for(int idx=0; idx < size && justNoise1 ;idx++){
+		justNoise1 = BitStream[idx] < THRESHOLD;
+	}
+	return justNoise1;
+}
+int autoCorr(const int* in, int *out, size_t len, int window)
+{
+	static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
+
+	if (window == 0) {
+		PrintAndLog("needs a window");
+		return 0;
+	}
+	if (window >= len) {
+		PrintAndLog("window must be smaller than trace (%d samples)",
+		len);
+		return 0;
+	}
+
+	PrintAndLog("performing %d correlations", len - window);
+
+	for (int i = 0; i < len - window; ++i) {
+		int sum = 0;
+		for (int j = 0; j < window; ++j) {
+			sum += (in[j]*in[i + j]) / 256;
+		}
+		CorrelBuffer[i] = sum;
+	}
+	//GraphTraceLen = GraphTraceLen - window;
+	memcpy(out, CorrelBuffer, len * sizeof (int));
+	return 0;
+}
+int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down)
+{
+	int lastValue = in[0];
+	out[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 < len; ++i) {
+		// Apply first threshold to samples heading up
+		if (in[i] >= up && in[i] > lastValue)
+		{
+			lastValue = out[i]; // Buffer last value as we overwrite it.
+			out[i] = 1;
+		}
+		// Apply second threshold to samples heading down
+		else if (in[i] <= down && in[i] < lastValue)
+		{
+			lastValue = out[i]; // Buffer last value as we overwrite it.
+			out[i] = -1;
+		}
+		else
+		{
+			lastValue = out[i]; // Buffer last value as we overwrite it.
+			out[i] = out[i-1];
+		}
+	}
+	out[0] = out[1]; // Align with first edited sample.
+	return 0;
+}