git.zerfleddert.de Git - proxmark3-svn/blob - client/graph.c

   1 //-----------------------------------------------------------------------------
   2 // Copyright (C) 2010 iZsh <izsh at fail0verflow.com>
   3 //
   4 // This code is licensed to you under the terms of the GNU GPL, version 2 or,
   5 // at your option, any later version. See the LICENSE.txt file for the text of
   6 // the license.
   7 //-----------------------------------------------------------------------------
   8 // Graph utilities
   9 //-----------------------------------------------------------------------------
  10
  11 #include <stdio.h>
  12 #include <stdbool.h>
  13 #include <string.h>
  14 #include "ui.h"
  15 #include "graph.h"
  16 #include "lfdemod.h"
  17
  18 int GraphBuffer[MAX_GRAPH_TRACE_LEN];
  19 int GraphTraceLen;
  20
  21 int s_Buff[MAX_GRAPH_TRACE_LEN];
  22
  23
  24 /* write a bit to the graph */
  25 void AppendGraph(int redraw, int clock, int bit)
  26 {
  27   int i;
  28
  29   for (i = 0; i < (int)(clock / 2); ++i)
  30     GraphBuffer[GraphTraceLen++] = bit ^ 1;
  31
  32   for (i = (int)(clock / 2); i < clock; ++i)
  33     GraphBuffer[GraphTraceLen++] = bit;
  34
  35   if (redraw)
  36     RepaintGraphWindow();
  37 }
  38
  39 // clear out our graph window
  40 int ClearGraph(int redraw)
  41 {
  42   int gtl = GraphTraceLen;
  43   memset(GraphBuffer, 0x00, GraphTraceLen);
  44
  45   GraphTraceLen = 0;
  46
  47   if (redraw)
  48     RepaintGraphWindow();
  49
  50   return gtl;
  51 }
  52
  53 // DETECT CLOCK NOW IN LFDEMOD.C
  54
  55 void setGraphBuf(uint8_t *buff, size_t size)
  56 {
  57         if ( buff == NULL ) return;
  58
  59         uint16_t i = 0;
  60         if ( size > MAX_GRAPH_TRACE_LEN )
  61                 size = MAX_GRAPH_TRACE_LEN;
  62   ClearGraph(0);
  63   for (; i < size; ++i){
  64                 GraphBuffer[i]=buff[i]-128;
  65   }
  66   GraphTraceLen=size;
  67   RepaintGraphWindow();
  68   return;
  69 }
  70 size_t getFromGraphBuf(uint8_t *buff)
  71 {
  72         if ( buff == NULL ) return 0;
  73
  74   uint32_t i;
  75   for (i=0;i<GraphTraceLen;++i){
  76     if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
  77     if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
  78     buff[i]=(uint8_t)(GraphBuffer[i]+128);
  79   }
  80   return i;
  81 }
  82
  83
  84 // Get or auto-detect clock rate
  85 int GetClock(const char *str, int peak, int verbose)
  86 {
  87         int clock;
  88         sscanf(str, "%i", &clock);
  89         if (!strcmp(str, ""))
  90                 clock = 0;
  91
  92         // Auto-detect clock
  93         if (!clock)
  94         {
  95                 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
  96                 size_t size = getFromGraphBuf(grph);
  97                 if ( size == 0 ) {
  98                         PrintAndLog("Failed to copy from graphbuffer");
  99                         return -1;
 100                 }
 101                 clock = DetectASKClock(grph,size,0);
 102                 // Only print this message if we're not looping something
 103                 if (!verbose){
 104                         PrintAndLog("Auto-detected clock rate: %d", clock);
 105                 }
 106         }
 107         return clock;
 108 }
 109
 110 // A simple test to see if there is any data inside Graphbuffer.
 111 bool HasGraphData(){
 112
 113         if ( GraphTraceLen <= 0) {
 114                 PrintAndLog("No data available, try reading something first");
 115                 return false;
 116         }
 117         return true;
 118 }
 119
 120 // Detect high and lows in Grapbuffer.
 121 // Only loops the first 256 values.
 122 void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
 123
 124         uint8_t loopMax = 255;
 125         if ( loopMax > GraphTraceLen)
 126                 loopMax = GraphTraceLen;
 127
 128         for (uint8_t i = 0; i < loopMax; ++i) {
 129                 if (GraphBuffer[i] > *high)
 130                         *high = GraphBuffer[i];
 131                 else if (GraphBuffer[i] < *low)
 132                         *low = GraphBuffer[i];
 133         }
 134
 135         //12% fuzz in case highs and lows aren't clipped
 136         if (addFuzz) {
 137                 *high = (int)(*high * .88);
 138                 *low  = (int)(*low  * .88);
 139         }
 140 }
 141
 142 int GetNRZpskClock(const char *str, int peak, int verbose)
 143 {
 144         int clock;
 145         sscanf(str, "%i", &clock);
 146         if (!strcmp(str, ""))
 147                 clock = 0;
 148
 149         // Auto-detect clock
 150         if (!clock)
 151         {
 152                 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
 153                 size_t size = getFromGraphBuf(grph);
 154                 if ( size == 0 ) {
 155                         PrintAndLog("Failed to copy from graphbuffer");
 156                         return -1;
 157                 }
 158                 clock = DetectpskNRZClock(grph,size,0);
 159                 // Only print this message if we're not looping something
 160                 if (!verbose){
 161                         PrintAndLog("Auto-detected clock rate: %d", clock);
 162                 }
 163         }
 164         return clock;
 165 }