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