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 /* write a manchester bit to the graph */
  21 void AppendGraph(int redraw, int clock, int bit)
  22 {
  23   int i;
  24   //set first half the clock bit (all 1's or 0's for a 0 or 1 bit)
  25   for (i = 0; i < (int)(clock / 2); ++i)
  26     GraphBuffer[GraphTraceLen++] = bit ;
  27   //set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
  28   for (i = (int)(clock / 2); i < clock; ++i)
  29     GraphBuffer[GraphTraceLen++] = bit ^ 1;
  30
  31   if (redraw)
  32     RepaintGraphWindow();
  33 }
  34
  35 // clear out our graph window
  36 int ClearGraph(int redraw)
  37 {
  38   int gtl = GraphTraceLen;
  39   memset(GraphBuffer, 0x00, GraphTraceLen);
  40
  41   GraphTraceLen = 0;
  42
  43   if (redraw)
  44     RepaintGraphWindow();
  45
  46   return gtl;
  47 }
  48 // option '1' to save GraphBuffer any other to restore
  49 void save_restoreGB(uint8_t saveOpt)
  50 {
  51         static int SavedGB[MAX_GRAPH_TRACE_LEN];
  52         static int SavedGBlen;
  53         static bool GB_Saved = false;
  54
  55         if (saveOpt==1) { //save
  56                 memcpy(SavedGB,GraphBuffer, sizeof(GraphBuffer));
  57                 SavedGBlen = GraphTraceLen;
  58                 GB_Saved=true;
  59         } else if (GB_Saved){
  60                 memcpy(GraphBuffer,SavedGB, sizeof(GraphBuffer));
  61                 GraphTraceLen = SavedGBlen;
  62         }
  63         return;
  64 }
  65
  66 // DETECT CLOCK NOW IN LFDEMOD.C
  67
  68 void setGraphBuf(uint8_t *buff, size_t size)
  69 {
  70         if ( buff == NULL ) return;
  71
  72         uint16_t i = 0;
  73         if ( size > MAX_GRAPH_TRACE_LEN )
  74                 size = MAX_GRAPH_TRACE_LEN;
  75         ClearGraph(0);
  76         for (; i < size; ++i){
  77                 GraphBuffer[i]=buff[i]-128;
  78         }
  79         GraphTraceLen=size;
  80         RepaintGraphWindow();
  81         return;
  82 }
  83 size_t getFromGraphBuf(uint8_t *buff)
  84 {
  85         if (buff == NULL ) return 0;
  86         uint32_t i;
  87         for (i=0;i<GraphTraceLen;++i){
  88                 if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
  89                 if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
  90                 buff[i]=(uint8_t)(GraphBuffer[i]+128);
  91         }
  92         return i;
  93 }
  94
  95 // A simple test to see if there is any data inside Graphbuffer.
  96 bool HasGraphData(){
  97
  98         if ( GraphTraceLen <= 0) {
  99                 PrintAndLog("No data available, try reading something first");
 100                 return false;
 101         }
 102         return true;
 103 }
 104
 105 // Detect high and lows in Grapbuffer.
 106 // Only loops the first 256 values.
 107 void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
 108
 109         uint8_t loopMax = 255;
 110         if ( loopMax > GraphTraceLen)
 111                 loopMax = GraphTraceLen;
 112
 113         for (uint8_t i = 0; i < loopMax; ++i) {
 114                 if (GraphBuffer[i] > *high)
 115                         *high = GraphBuffer[i];
 116                 else if (GraphBuffer[i] < *low)
 117                         *low = GraphBuffer[i];
 118         }
 119
 120         //12% fuzz in case highs and lows aren't clipped
 121         if (addFuzz) {
 122                 *high = (int)(*high * .88);
 123                 *low  = (int)(*low  * .88);
 124         }
 125 }
 126
 127 // Get or auto-detect ask clock rate
 128 int GetAskClock(const char str[], bool printAns, bool verbose)
 129 {
 130         int clock;
 131         sscanf(str, "%i", &clock);
 132         if (!strcmp(str, ""))
 133                 clock = 0;
 134
 135         if (clock != 0)
 136                 return clock;
 137         // Auto-detect clock
 138         uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
 139         size_t size = getFromGraphBuf(grph);
 140         if (size == 0) {
 141                 if (verbose)
 142                         PrintAndLog("Failed to copy from graphbuffer");
 143                 return -1;
 144         }
 145         DetectASKClock(grph, size, &clock, 20);
 146         // Only print this message if we're not looping something
 147         if (printAns){
 148                 PrintAndLog("Auto-detected clock rate: %d", clock);
 149         }
 150         return clock;
 151 }
 152
 153 uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
 154 {
 155         uint8_t carrier=0;
 156         uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
 157         size_t size = getFromGraphBuf(grph);
 158         if ( size == 0 ) {
 159                 if (verbose)
 160                         PrintAndLog("Failed to copy from graphbuffer");
 161                 return 0;
 162         }
 163         //uint8_t countPSK_FC(uint8_t *BitStream, size_t size)
 164
 165         carrier = countFC(grph,size,0);
 166         // Only print this message if we're not looping something
 167         if (printAns){
 168                 PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
 169         }
 170         return carrier;
 171 }
 172
 173 int GetPskClock(const char str[], bool printAns, bool verbose)
 174 {
 175         int clock;
 176         sscanf(str, "%i", &clock);
 177         if (!strcmp(str, ""))
 178                 clock = 0;
 179
 180         if (clock!=0)
 181                 return clock;
 182         // Auto-detect clock
 183         uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
 184         size_t size = getFromGraphBuf(grph);
 185         if ( size == 0 ) {
 186                 if (verbose)
 187                         PrintAndLog("Failed to copy from graphbuffer");
 188                 return -1;
 189         }
 190         clock = DetectPSKClock(grph,size,0);
 191         // Only print this message if we're not looping something
 192         if (printAns){
 193                 PrintAndLog("Auto-detected clock rate: %d", clock);
 194         }
 195         return clock;
 196 }
 197
 198 uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
 199 {
 200         int clock;
 201         sscanf(str, "%i", &clock);
 202         if (!strcmp(str, ""))
 203                 clock = 0;
 204
 205         if (clock!=0)
 206                 return clock;
 207         // Auto-detect clock
 208         uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
 209         size_t size = getFromGraphBuf(grph);
 210         if ( size == 0 ) {
 211                 if (verbose)
 212                         PrintAndLog("Failed to copy from graphbuffer");
 213                 return -1;
 214         }
 215         clock = DetectNRZClock(grph, size, 0);
 216         // Only print this message if we're not looping something
 217         if (printAns){
 218                 PrintAndLog("Auto-detected clock rate: %d", clock);
 219         }
 220         return clock;
 221 }
 222 //by marshmellow
 223 //attempt to detect the field clock and bit clock for FSK
 224 uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
 225 {
 226         int clock;
 227         sscanf(str, "%i", &clock);
 228         if (!strcmp(str, ""))
 229                 clock = 0;
 230         if (clock != 0) return (uint8_t)clock;
 231
 232
 233         uint8_t fc1=0, fc2=0, rf1=0;
 234         uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
 235         if (ans == 0) return 0;
 236         if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
 237                 if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
 238                 return rf1;
 239         }
 240         if (verbose){
 241                 PrintAndLog("DEBUG: unknown fsk field clock detected");
 242                 PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
 243         }
 244         return 0;
 245 }
 246 uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose)
 247 {
 248         uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
 249         size_t size = getFromGraphBuf(BitStream);
 250         if (size==0) return 0;
 251         uint16_t ans = countFC(BitStream, size, 1);
 252         if (ans==0) {
 253                 if (verbose) PrintAndLog("DEBUG: No data found");
 254                 return 0;
 255         }
 256         *fc1 = (ans >> 8) & 0xFF;
 257         *fc2 = ans & 0xFF;
 258
 259         *rf1 = detectFSKClk(BitStream, size, *fc1, *fc2);
 260         if (*rf1==0) {
 261                 if (verbose) PrintAndLog("DEBUG: Clock detect error");
 262                 return 0;
 263         }
 264         return 1;
 265 }