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

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "ui.h"
   4 #include "graph.h"
   5
   6 int GraphBuffer[MAX_GRAPH_TRACE_LEN];
   7 int GraphTraceLen;
   8
   9 /* write a bit to the graph */
  10 void AppendGraph(int redraw, int clock, int bit)
  11 {
  12   int i;
  13
  14   for (i = 0; i < (int)(clock / 2); ++i)
  15     GraphBuffer[GraphTraceLen++] = bit ^ 1;
  16
  17   for (i = (int)(clock / 2); i < clock; ++i)
  18     GraphBuffer[GraphTraceLen++] = bit;
  19
  20   if (redraw)
  21     RepaintGraphWindow();
  22 }
  23
  24 /* clear out our graph window */
  25 int ClearGraph(int redraw)
  26 {
  27   int gtl = GraphTraceLen;
  28   GraphTraceLen = 0;
  29
  30   if (redraw)
  31     RepaintGraphWindow();
  32
  33   return gtl;
  34 }
  35
  36 /*
  37  * Detect clock rate
  38  */
  39 int DetectClock(int peak)
  40 {
  41   int i;
  42   int clock = 0xFFFF;
  43   int lastpeak = 0;
  44
  45   /* Detect peak if we don't have one */
  46   if (!peak)
  47     for (i = 0; i < GraphTraceLen; ++i)
  48       if (GraphBuffer[i] > peak)
  49         peak = GraphBuffer[i];
  50
  51   for (i = 1; i < GraphTraceLen; ++i)
  52   {
  53     /* If this is the beginning of a peak */
  54     if (GraphBuffer[i - 1] != GraphBuffer[i] && GraphBuffer[i] == peak)
  55     {
  56       /* Find lowest difference between peaks */
  57       if (lastpeak && i - lastpeak < clock)
  58         clock = i - lastpeak;
  59       lastpeak = i;
  60     }
  61   }
  62
  63   return clock;
  64 }
  65
  66 /* Get or auto-detect clock rate */
  67 int GetClock(const char *str, int peak, int verbose)
  68 {
  69   int clock;
  70
  71   sscanf(str, "%i", &clock);
  72   if (!strcmp(str, ""))
  73     clock = 0;
  74
  75   /* Auto-detect clock */
  76   if (!clock)
  77   {
  78     clock = DetectClock(peak);
  79     /* Only print this message if we're not looping something */
  80     if (!verbose)
  81       PrintAndLog("Auto-detected clock rate: %d", clock);
  82   }
  83
  84   return clock;
  85 }