minor fix for a help in "hf 14a snoop"

[proxmark3-svn] / client / graph.c

diff --git a/client/graph.c b/client/graph.c
index a2753af7b011686fd22002dce5019c5acbbd2281..0f998fe1aa90c7af2142ca9126ab35979ba60ff3 100644 (file)
--- a/client/graph.c
+++ b/client/graph.c
@@ -9,6 +9,7 @@
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>
 //-----------------------------------------------------------------------------
 
 #include <stdio.h>

+#include <stdbool.h>

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


@@ -24,7 +25,7 @@ void AppendGraph(int redraw, int clock, int bit)
 
   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;
 


@@ -32,7 +33,7 @@ void AppendGraph(int redraw, int clock, int bit)
     RepaintGraphWindow();
 }
 
     RepaintGraphWindow();
 }
 

-/* clear out our graph window */
+// clear out our graph window

 int ClearGraph(int redraw)
 {
   int gtl = GraphTraceLen;
 int ClearGraph(int redraw)
 {
   int gtl = GraphTraceLen;


@@ -46,116 +47,27 @@ int ClearGraph(int redraw)
   return gtl;
 }
 
   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];
+// DETECT CLOCK NOW IN LFDEMOD.C

 
 

- // 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;
-    }
-  }
-
-  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,int size) 
+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){
   ClearGraph(0);
   for (; i < size; ++i){

-    GraphBuffer[i]=buff[i];
+               GraphBuffer[i]=buff[i]-128;

   }
   GraphTraceLen=size;
   RepaintGraphWindow();
   return;
 }
   }
   GraphTraceLen=size;
   RepaintGraphWindow();
   return;
 }

-int getFromGraphBuf(uint8_t *buff)
+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
   uint32_t i;
   for (i=0;i<GraphTraceLen;++i){
     if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim


@@ -164,28 +76,80 @@ int getFromGraphBuf(uint8_t *buff)
   }
   return i;
 }
   }
   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;
 int GetClock(const char *str, int peak, int verbose)
 {
   int clock;

-//  int clock2;

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

-  /* Auto-detect clock */
+       // Auto-detect clock

   if (!clock)
   {
     uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
   if (!clock)
   {
     uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};

-    int size = getFromGraphBuf(grph);
+               size_t size = getFromGraphBuf(grph);
+               if ( size < 0 ) {
+                       PrintAndLog("Failed to copy from graphbuffer");
+                       return -1;
+               }

     clock = DetectASKClock(grph,size,0);
     clock = DetectASKClock(grph,size,0);

-    //clock2 = DetectClock2(peak);
-    /* 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);
     if (!verbose){
       PrintAndLog("Auto-detected clock rate: %d", clock);

-      //PrintAndLog("clock2: %d",clock2);

     }
     }

-  }
-

   return 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;
+       sscanf(str, "%i", &clock);
+       if (!strcmp(str, ""))
+               clock = 0;
+
+       // 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);
+               }
+       }
+       return clock;
+}
\ No newline at end of file