fix lf search bugs when no tag is on antenna

[proxmark3-svn] / client / graph.c

diff --git a/client/graph.c b/client/graph.c
index 9079e07388fbb8ffa08c236383bb1dae8d651e12..3ea47d2d4267ca30b7cdb5a7645ee350a994808c 100644 (file)
--- a/client/graph.c
+++ b/client/graph.c
@@ -9,46 +9,77 @@
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>

+#include <stdbool.h>

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

+#include "cmddata.h" //for g_debugmode

 
 int GraphBuffer[MAX_GRAPH_TRACE_LEN];
 int GraphTraceLen;
 
 
 int GraphBuffer[MAX_GRAPH_TRACE_LEN];
 int GraphTraceLen;
 

-/* write a bit to the graph */
+int s_Buff[MAX_GRAPH_TRACE_LEN];
+
+/* write a manchester bit to the graph */

 void AppendGraph(int redraw, int clock, int bit)
 {
 void AppendGraph(int redraw, int clock, int bit)
 {

-       int i;
-
-       for (i = 0; i < (int)(clock / 2); ++i)
-               GraphBuffer[GraphTraceLen++] = bit ^ 1;
+  int i;
+  //set first half the clock bit (all 1's or 0's for a 0 or 1 bit) 
+  for (i = 0; i < (int)(clock / 2); ++i)
+    GraphBuffer[GraphTraceLen++] = bit ;
+  //set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
+  for (i = (int)(clock / 2); i < clock; ++i)
+    GraphBuffer[GraphTraceLen++] = bit ^ 1;

 
 

-       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)
 {
 }
 
 // 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;
+
+  if (redraw)
+    RepaintGraphWindow();

 
 

-       return gtl;
+  return gtl;
+}
+// option '1' to save GraphBuffer any other to restore
+void save_restoreGB(uint8_t saveOpt)
+{
+       static int SavedGB[MAX_GRAPH_TRACE_LEN];
+       static int SavedGBlen=0;
+       static bool GB_Saved = false;
+       static int SavedGridOffsetAdj=0;
+
+       if (saveOpt == GRAPH_SAVE) { //save
+               memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer));
+               SavedGBlen = GraphTraceLen;
+               GB_Saved=true;
+               SavedGridOffsetAdj = GridOffset;
+       } else if (GB_Saved) { //restore
+               memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer));
+               GraphTraceLen = SavedGBlen;
+               GridOffset = SavedGridOffsetAdj;
+               RepaintGraphWindow();
+       }
+       return;

 }
 
 // DETECT CLOCK NOW IN LFDEMOD.C
 
 void setGraphBuf(uint8_t *buff, size_t size)
 {
 }
 
 // DETECT CLOCK NOW IN LFDEMOD.C
 
 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;
        ClearGraph(0);
        for (; i < size; ++i){
                GraphBuffer[i]=buff[i]-128;


@@ -59,6 +90,7 @@ void setGraphBuf(uint8_t *buff, size_t size)
 }
 size_t getFromGraphBuf(uint8_t *buff)
 {
 }
 size_t getFromGraphBuf(uint8_t *buff)
 {

+       if (buff == NULL ) return 0;

        uint32_t i;
        for (i=0;i<GraphTraceLen;++i){
                if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
        uint32_t i;
        for (i=0;i<GraphTraceLen;++i){
                if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim


@@ -67,46 +99,200 @@ size_t getFromGraphBuf(uint8_t *buff)
        }
        return i;
 }
        }
        return i;
 }

-// Get or auto-detect clock rate
-int GetClock(const char *str, int peak, int verbose)
+
+// 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);
+       }
+}
+
+// Get or auto-detect ask clock rate
+int GetAskClock(const char str[], bool printAns, bool verbose)

 {
        int clock;
        sscanf(str, "%i", &clock);
        if (!strcmp(str, ""))
                clock = 0;
 
 {
        int clock;
        sscanf(str, "%i", &clock);
        if (!strcmp(str, ""))
                clock = 0;
 

+       if (clock != 0) 
+               return clock;

        // Auto-detect clock
        // 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);
-               }
+       uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+       size_t size = getFromGraphBuf(grph);
+       if (size == 0) {
+               if (verbose)
+                       PrintAndLog("Failed to copy from graphbuffer");
+               return -1;

        }
        }

+       //, 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 || g_debugMode) {
+               PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
+       }
+       return clock;
+}

 
 

+uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
+{
+       uint8_t carrier=0;
+       uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+       size_t size = getFromGraphBuf(grph);
+       if ( size == 0 ) {
+               if (verbose) 
+                       PrintAndLog("Failed to copy from graphbuffer");
+               return 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) {
+               PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
+       }
+       return carrier;
+}
+
+int GetPskClock(const char str[], bool printAns, bool verbose)
+{
+       int clock;
+       sscanf(str, "%i", &clock);
+       if (!strcmp(str, "")) 
+               clock = 0;
+
+       if (clock!=0) 
+               return clock;
+       // Auto-detect clock
+       uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+       size_t size = getFromGraphBuf(grph);
+       if ( size == 0 ) {
+               if (verbose) 
+                       PrintAndLog("Failed to copy from graphbuffer");
+               return -1;
+       }
+       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);
+       }

        return clock;
 }
 
        return clock;
 }
 

-int GetNRZpskClock(const char *str, int peak, int verbose)
+uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)

 {
        int clock;
        sscanf(str, "%i", &clock);
        if (!strcmp(str, ""))
                clock = 0;
 
 {
        int clock;
        sscanf(str, "%i", &clock);
        if (!strcmp(str, ""))
                clock = 0;
 

+       if (clock!=0) 
+               return clock;

        // Auto-detect clock
        // 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);
-               }
+       uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
+       size_t size = getFromGraphBuf(grph);
+       if ( size == 0 ) {
+               if (verbose) 
+                       PrintAndLog("Failed to copy from graphbuffer");
+               return -1;
+       }
+       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);

        }
        return clock;
 }
        }
        return clock;
 }

+//by marshmellow
+//attempt to detect the field clock and bit clock for FSK
+uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
+{
+       int clock;
+       sscanf(str, "%i", &clock);
+       if (!strcmp(str, ""))
+               clock = 0;
+       if (clock != 0) return (uint8_t)clock;
+
+
+       uint8_t fc1=0, fc2=0, rf1=0;
+       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){
+               PrintAndLog("DEBUG: unknown fsk field clock detected");
+               PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
+       }
+       return 0;
+}
+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 || g_debugMode) PrintAndLog("DEBUG: No data found");
+               return 0;
+       }
+       *fc1 = (ans >> 8) & 0xFF;
+       *fc2 = ans & 0xFF;
+       //int firstClockEdge = 0;
+       *rf1 = detectFSKClk(BitStream, size, *fc1, *fc2, firstClockEdge);
+       if (*rf1==0) {
+               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;
+}