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ADD: `data detectclock` - added clock blocks in plot window. Its a draft. Not working...
[proxmark3-svn] / client / graph.c
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a553f267 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
7fe9b0b7 11#include <stdio.h>
a1557c4c 12#include <stdbool.h>
7fe9b0b7 13#include <string.h>
14#include "ui.h"
15#include "graph.h"
d5a72d2f 16#include "lfdemod.h"
7fe9b0b7 17
18int GraphBuffer[MAX_GRAPH_TRACE_LEN];
19int GraphTraceLen;
abd6112f 20/* write a manchester bit to the graph */
7fe9b0b7 21void AppendGraph(int redraw, int clock, int bit)
22{
23 int i;
abd6112f 24 //set first half the clock bit (all 1's or 0's for a 0 or 1 bit)
7fe9b0b7 25 for (i = 0; i < (int)(clock / 2); ++i)
78f5b1a7 26 GraphBuffer[GraphTraceLen++] = bit ;
abd6112f 27 //set second half of the clock bit (all 0's or 1's for a 0 or 1 bit)
7fe9b0b7 28 for (i = (int)(clock / 2); i < clock; ++i)
78f5b1a7 29 GraphBuffer[GraphTraceLen++] = bit ^ 1;
7fe9b0b7 30
31 if (redraw)
32 RepaintGraphWindow();
33}
34
c12512e9 35// clear out our graph window
7fe9b0b7 36int ClearGraph(int redraw)
37{
38 int gtl = GraphTraceLen;
52ab55ab 39 memset(GraphBuffer, 0x00, GraphTraceLen);
40
7fe9b0b7 41 GraphTraceLen = 0;
42
43 if (redraw)
44 RepaintGraphWindow();
45
46 return gtl;
47}
23f0a7d8 48// option '1' to save GraphBuffer any other to restore
49void 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
2767fc02 56 memcpy(SavedGB, GraphBuffer, sizeof(GraphBuffer));
23f0a7d8 57 SavedGBlen = GraphTraceLen;
58 GB_Saved=true;
49bbc60a 59 } else if (GB_Saved){ //restore
2767fc02 60 memcpy(GraphBuffer, SavedGB, sizeof(GraphBuffer));
23f0a7d8 61 GraphTraceLen = SavedGBlen;
49bbc60a 62 RepaintGraphWindow();
23f0a7d8 63 }
64 return;
65}
7fe9b0b7 66
c12512e9 67// DETECT CLOCK NOW IN LFDEMOD.C
7fe9b0b7 68
ba1a299c 69void setGraphBuf(uint8_t *buff, size_t size)
d5a72d2f 70{
a1557c4c 71 if ( buff == NULL ) return;
72
73 uint16_t i = 0;
74 if ( size > MAX_GRAPH_TRACE_LEN )
75 size = MAX_GRAPH_TRACE_LEN;
b4fb11ba 76 ClearGraph(0);
77 for (; i < size; ++i){
ba1a299c 78 GraphBuffer[i]=buff[i]-128;
b4fb11ba 79 }
80 GraphTraceLen=size;
81 RepaintGraphWindow();
82 return;
d5a72d2f 83}
ba1a299c 84size_t getFromGraphBuf(uint8_t *buff)
d5a72d2f 85{
e770c648 86 if (buff == NULL ) return 0;
b4fb11ba 87 uint32_t i;
88 for (i=0;i<GraphTraceLen;++i){
89 if (GraphBuffer[i]>127) GraphBuffer[i]=127; //trim
90 if (GraphBuffer[i]<-127) GraphBuffer[i]=-127; //trim
91 buff[i]=(uint8_t)(GraphBuffer[i]+128);
92 }
93 return i;
d5a72d2f 94}
ec75f5c1 95
a1557c4c 96// A simple test to see if there is any data inside Graphbuffer.
97bool HasGraphData(){
7fe9b0b7 98
a1557c4c 99 if ( GraphTraceLen <= 0) {
100 PrintAndLog("No data available, try reading something first");
101 return false;
102 }
103 return true;
104}
105
106// Detect high and lows in Grapbuffer.
107// Only loops the first 256 values.
108void DetectHighLowInGraph(int *high, int *low, bool addFuzz) {
109
110 uint8_t loopMax = 255;
111 if ( loopMax > GraphTraceLen)
112 loopMax = GraphTraceLen;
113
114 for (uint8_t i = 0; i < loopMax; ++i) {
115 if (GraphBuffer[i] > *high)
116 *high = GraphBuffer[i];
117 else if (GraphBuffer[i] < *low)
118 *low = GraphBuffer[i];
119 }
120
121 //12% fuzz in case highs and lows aren't clipped
122 if (addFuzz) {
123 *high = (int)(*high * .88);
124 *low = (int)(*low * .88);
125 }
7fe9b0b7 126}
ba1a299c 127
f3bf15e4 128// Get or auto-detect ask clock rate
129int GetAskClock(const char str[], bool printAns, bool verbose)
e770c648 130{
131 int clock;
132 sscanf(str, "%i", &clock);
133 if (!strcmp(str, ""))
134 clock = 0;
135
f3bf15e4 136 if (clock != 0)
137 return clock;
e770c648 138 // Auto-detect clock
f3bf15e4 139 uint8_t grph[MAX_GRAPH_TRACE_LEN]={0};
140 size_t size = getFromGraphBuf(grph);
141 if (size == 0) {
142 if (verbose)
e770c648 143 PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4 144 return -1;
145 }
c0f15a05 146 bool st = DetectST(grph, &size, &clock);
147 int start = 0;
148 if (st == false) {
149 start = DetectASKClock(grph, size, &clock, 20);
150 }
f3bf15e4 151 // Only print this message if we're not looping something
152 if (printAns){
fef74fdc 153 PrintAndLog("Auto-detected clock rate: %d, Best Starting Position: %d", clock, start);
e770c648 154 }
a47ded5b 155 PlotClock = clock;
156 PlockClockStartIndex = start;
e770c648 157 return clock;
158}
159
872e3d4d 160uint8_t GetPskCarrier(const char str[], bool printAns, bool verbose)
161{
a47ded5b 162 uint8_t carrier = 0;
163 uint8_t grph[MAX_GRAPH_TRACE_LEN] = {0};
872e3d4d 164 size_t size = getFromGraphBuf(grph);
165 if ( size == 0 ) {
166 if (verbose)
167 PrintAndLog("Failed to copy from graphbuffer");
168 return 0;
169 }
a47ded5b 170 carrier = countFC(grph, size, 0);
872e3d4d 171 // Only print this message if we're not looping something
a47ded5b 172 if (printAns)
872e3d4d 173 PrintAndLog("Auto-detected PSK carrier rate: %d", carrier);
a47ded5b 174
872e3d4d 175 return carrier;
176}
177
f3bf15e4 178int GetPskClock(const char str[], bool printAns, bool verbose)
179{
180 int clock;
181 sscanf(str, "%i", &clock);
182 if (!strcmp(str, ""))
183 clock = 0;
184
a47ded5b 185 if (clock != 0) return clock;
f3bf15e4 186 // Auto-detect clock
a47ded5b 187 uint8_t grph[MAX_GRAPH_TRACE_LEN] = {0};
f3bf15e4 188 size_t size = getFromGraphBuf(grph);
189 if ( size == 0 ) {
1a4b9073 190 if (verbose) PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4 191 return -1;
192 }
a47ded5b 193 clock = DetectPSKClock(grph, size, 0);
f3bf15e4 194 // Only print this message if we're not looping something
1a4b9073 195 if (printAns) PrintAndLog("Auto-detected clock rate: %d", clock);
196
a47ded5b 197 PlotClock = clock;
198// PlockClockStartIndex = start;
f3bf15e4 199 return clock;
200}
201
202uint8_t GetNrzClock(const char str[], bool printAns, bool verbose)
4118b74d 203{
ba1a299c 204 int clock;
ba1a299c 205 sscanf(str, "%i", &clock);
206 if (!strcmp(str, ""))
207 clock = 0;
208
a47ded5b 209 if (clock != 0)
f3bf15e4 210 return clock;
ba1a299c 211 // Auto-detect clock
a47ded5b 212 uint8_t grph[MAX_GRAPH_TRACE_LEN] = {0};
f3bf15e4 213 size_t size = getFromGraphBuf(grph);
214 if ( size == 0 ) {
215 if (verbose)
e629181f 216 PrintAndLog("Failed to copy from graphbuffer");
f3bf15e4 217 return -1;
218 }
219 clock = DetectNRZClock(grph, size, 0);
220 // Only print this message if we're not looping something
a47ded5b 221 if (printAns)
f3bf15e4 222 PrintAndLog("Auto-detected clock rate: %d", clock);
a47ded5b 223
224 PlotClock = clock;
225 //PlockClockStartIndex = start;
ba1a299c 226 return clock;
4118b74d 227}
f3bf15e4 228//by marshmellow
229//attempt to detect the field clock and bit clock for FSK
230uint8_t GetFskClock(const char str[], bool printAns, bool verbose)
231{
232 int clock;
233 sscanf(str, "%i", &clock);
234 if (!strcmp(str, ""))
235 clock = 0;
236 if (clock != 0) return (uint8_t)clock;
237
abd6112f 238
239 uint8_t fc1=0, fc2=0, rf1=0;
240 uint8_t ans = fskClocks(&fc1, &fc2, &rf1, verbose);
241 if (ans == 0) return 0;
242 if ((fc1==10 && fc2==8) || (fc1==8 && fc2==5)){
243 if (printAns) PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
244 return rf1;
245 }
246 if (verbose){
247 PrintAndLog("DEBUG: unknown fsk field clock detected");
248 PrintAndLog("Detected Field Clocks: FC/%d, FC/%d - Bit Clock: RF/%d", fc1, fc2, rf1);
249 }
a47ded5b 250 //PlotClock = clock;
251 //PlockClockStartIndex = start;
abd6112f 252 return 0;
253}
254uint8_t fskClocks(uint8_t *fc1, uint8_t *fc2, uint8_t *rf1, bool verbose)
255{
a47ded5b 256 uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0};
f3bf15e4 257 size_t size = getFromGraphBuf(BitStream);
a47ded5b 258 if (size == 0) return 0;
2eec55c8 259 uint16_t ans = countFC(BitStream, size, 1);
a47ded5b 260 if (ans == 0) {
1a4b9073 261 if (verbose || g_debugMode) PrintAndLog("DEBUG: No data found");
f3bf15e4 262 return 0;
263 }
abd6112f 264 *fc1 = (ans >> 8) & 0xFF;
265 *fc2 = ans & 0xFF;
f3bf15e4 266
abd6112f 267 *rf1 = detectFSKClk(BitStream, size, *fc1, *fc2);
a47ded5b 268 if (*rf1 == 0) {
1a4b9073 269 if (verbose || g_debugMode) PrintAndLog("DEBUG: Clock detect error");
f3bf15e4 270 return 0;
271 }
abd6112f 272 return 1;
f3bf15e4 273}
3f84d473 274
275// test samples are not just noise
276bool graphJustNoise(int *BitStream, int size)
277{
278 //might not be high enough for noisy environments
279 #define THRESHOLD 15;
280
281 bool isNoise = TRUE;
282 for(int i=0; i < size && isNoise; i++){
283 isNoise = BitStream[i] < THRESHOLD;
284 }
285 return isNoise;
286}
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