lf Bug Fixes and lf demod additions

[proxmark3-svn] / client / graph.c

diff --git a/client/graph.c b/client/graph.c
index 18ff972a6e7449d46b9debefd17533b6a34020cf..174e4a5fe6abc71a2173faaf849088b4bcfae1de 100644 (file)
--- a/client/graph.c
+++ b/client/graph.c
@@ -12,6 +12,7 @@
 #include <string.h>
 #include "ui.h"
 #include "graph.h"
+#include "lfdemod.h"
 
 int GraphBuffer[MAX_GRAPH_TRACE_LEN];
 int GraphTraceLen;
@@ -23,7 +24,7 @@ void AppendGraph(int redraw, int clock, int bit)
 
   for (i = 0; i < (int)(clock / 2); ++i)
     GraphBuffer[GraphTraceLen++] = bit ^ 1;
-  
+
   for (i = (int)(clock / 2); i < clock; ++i)
     GraphBuffer[GraphTraceLen++] = bit;
 
@@ -31,10 +32,12 @@ void AppendGraph(int redraw, int clock, int bit)
     RepaintGraphWindow();
 }
 
-/* clear out our graph window */
+// clear out our graph window
 int ClearGraph(int redraw)
 {
   int gtl = GraphTraceLen;
+  memset(GraphBuffer, 0x00, GraphTraceLen);
+
   GraphTraceLen = 0;
 
   if (redraw)
@@ -43,131 +46,71 @@ int ClearGraph(int redraw)
   return gtl;
 }
 
-/*
- * Detect clock rate
- */
- //decommissioned - has difficulty detecting rf/32 and only works if data is manchester encoded
-/*
-int DetectClock2(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;
-}
-*/
-
-// 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 DetectClock(int peak)
+void setGraphBuf(uint8_t *buff, size_t size)
 {
   int i=0;
-  int low=0;
-  int clk[]={16,32,40,50,64,100,128,256};
-  if (!peak){
-    for (i=0;i<GraphTraceLen;++i){
-      if(GraphBuffer[i]>peak){
-        peak = GraphBuffer[i]; 
-      }
-      if(GraphBuffer[i]<low){
-        low = GraphBuffer[i];
-      }
-    }
-    peak=(int)(peak*.75);
-    low= (int)(low*.75);
+  ClearGraph(0);
+  for (; i < size; ++i){
+               GraphBuffer[i]=buff[i]-128;
   }
-  //int numbits;
-  int ii;
-  int loopCnt = 256;
-  if (GraphTraceLen<loopCnt) loopCnt = GraphTraceLen;
-  int clkCnt;
-  int tol = 0;
-  int bestErr=1000;
-  int errCnt[]={0,0,0,0,0,0,0,0};
- // int good;
-  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)){
-        //numbits=0;
-        //good=1;
-        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){
-            //numbits++;
-          }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
-            //numbits=0;
-            //good=0;
-            errCnt[clkCnt]++;
-            //break;
-          }    
-        }
-        if(errCnt[clkCnt]==0) return clk[clkCnt];
-        if(errCnt[clkCnt]<bestErr) bestErr=errCnt[clkCnt];
-      }
-    } 
-    errCnt[clkCnt]=bestErr;
-  }
-  int iii=0;
-  int best=0;
-  for (iii=0; iii<6;++iii){
-    if (errCnt[iii]<errCnt[best]){
-      best = iii;
-    }
+  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);
   }
-  PrintAndLog("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];
+  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 clock2;
   sscanf(str, "%i", &clock);
   if (!strcmp(str, ""))
     clock = 0;
 
-  /* Auto-detect clock */
+       // Auto-detect clock
   if (!clock)
   {
-    clock = DetectClock(peak);
-    //clock2 = DetectClock2(peak);
-    /* Only print this message if we're not looping something */
+    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);
-      //PrintAndLog("clock2: %d",clock2);
     }
   }
 
   return clock;
 }
+
+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;
+}