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fix: array index out of range in mfkeys.log (thanks to @TomHarkness)
[proxmark3-svn] / client / cmddata.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 // Data and Graph commands
9 //-----------------------------------------------------------------------------
10
11 #include "cmddata.h"
12
13 #include <stdio.h> // also included in util.h
14 #include <string.h> // also included in util.h
15 #include <inttypes.h>
16 #include <limits.h> // for CmdNorm INT_MIN && INT_MAX
17 #include "util.h"
18 #include "cmdmain.h"
19 #include "comms.h"
20 #include "ui.h" // for show graph controls
21 #include "graph.h" // for graph data
22 #include "cmdparser.h"// already included in cmdmain.h
23 #include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
24 #include "lfdemod.h" // for demod code
25 #include "loclass/cipherutils.h" // for decimating samples in getsamples
26 #include "cmdlfem4x.h"// for em410x demod
27
28 uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
29 uint8_t g_debugMode=0;
30 size_t DemodBufferLen=0;
31 int g_DemodStartIdx=0;
32 int g_DemodClock=0;
33
34 static int CmdHelp(const char *Cmd);
35
36 //set the demod buffer with given array of binary (one bit per byte)
37 //by marshmellow
38 void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
39 {
40 if (buff == NULL)
41 return;
42
43 if ( size > MAX_DEMOD_BUF_LEN - startIdx)
44 size = MAX_DEMOD_BUF_LEN - startIdx;
45
46 size_t i = 0;
47 for (; i < size; i++){
48 DemodBuffer[i]=buff[startIdx++];
49 }
50 DemodBufferLen=size;
51 return;
52 }
53
54 bool getDemodBuf(uint8_t *buff, size_t *size) {
55 if (buff == NULL) return false;
56 if (size == NULL) return false;
57 if (*size == 0) return false;
58
59 *size = (*size > DemodBufferLen) ? DemodBufferLen : *size;
60
61 memcpy(buff, DemodBuffer, *size);
62 return true;
63 }
64
65 // option '1' to save DemodBuffer any other to restore
66 void save_restoreDB(uint8_t saveOpt)
67 {
68 static uint8_t SavedDB[MAX_DEMOD_BUF_LEN];
69 static size_t SavedDBlen;
70 static bool DB_Saved = false;
71 static int savedDemodStartIdx = 0;
72 static int savedDemodClock = 0;
73
74 if (saveOpt == GRAPH_SAVE) { //save
75
76 memcpy(SavedDB, DemodBuffer, sizeof(DemodBuffer));
77 SavedDBlen = DemodBufferLen;
78 DB_Saved=true;
79 savedDemodStartIdx = g_DemodStartIdx;
80 savedDemodClock = g_DemodClock;
81 } else if (DB_Saved) { //restore
82 memcpy(DemodBuffer, SavedDB, sizeof(DemodBuffer));
83 DemodBufferLen = SavedDBlen;
84 g_DemodClock = savedDemodClock;
85 g_DemodStartIdx = savedDemodStartIdx;
86 }
87 return;
88 }
89
90 int CmdSetDebugMode(const char *Cmd)
91 {
92 int demod=0;
93 sscanf(Cmd, "%i", &demod);
94 g_debugMode=(uint8_t)demod;
95 return 1;
96 }
97
98 int usage_data_printdemodbuf(){
99 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
100 PrintAndLog("Options: ");
101 PrintAndLog(" h This help");
102 PrintAndLog(" x output in hex (omit for binary output)");
103 PrintAndLog(" o <offset> enter offset in # of bits");
104 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
105 return 0;
106 }
107
108 //by marshmellow
109 void printDemodBuff(void)
110 {
111 int bitLen = DemodBufferLen;
112 if (bitLen<1) {
113 PrintAndLog("no bits found in demod buffer");
114 return;
115 }
116 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
117
118 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
119 PrintAndLog("%s",bin);
120
121 return;
122 }
123
124 int CmdPrintDemodBuff(const char *Cmd)
125 {
126 char hex[512]={0x00};
127 bool hexMode = false;
128 bool errors = false;
129 uint32_t offset = 0; //could be size_t but no param_get16...
130 uint32_t length = 512;
131 char cmdp = 0;
132 while(param_getchar(Cmd, cmdp) != 0x00)
133 {
134 switch(param_getchar(Cmd, cmdp))
135 {
136 case 'h':
137 case 'H':
138 return usage_data_printdemodbuf();
139 case 'x':
140 case 'X':
141 hexMode = true;
142 cmdp++;
143 break;
144 case 'o':
145 case 'O':
146 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
147 if (!offset) errors = true;
148 cmdp += 2;
149 break;
150 case 'l':
151 case 'L':
152 length = param_get32ex(Cmd, cmdp+1, 512, 10);
153 if (!length) errors = true;
154 cmdp += 2;
155 break;
156 default:
157 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
158 errors = true;
159 break;
160 }
161 if(errors) break;
162 }
163 //Validations
164 if(errors) return usage_data_printdemodbuf();
165 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
166 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
167
168 if (hexMode){
169 char *buf = (char *) (DemodBuffer + offset);
170 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
171 numBits = binarraytohex(hex, buf, numBits);
172 if (numBits==0) return 0;
173 PrintAndLog("DemodBuffer: %s",hex);
174 } else {
175 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
176 }
177 return 1;
178 }
179
180 //by marshmellow
181 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
182 int CmdGetBitStream(const char *Cmd)
183 {
184 int i;
185 CmdHpf(Cmd);
186 for (i = 0; i < GraphTraceLen; i++) {
187 if (GraphBuffer[i] >= 1) {
188 GraphBuffer[i] = 1;
189 } else {
190 GraphBuffer[i] = 0;
191 }
192 }
193 RepaintGraphWindow();
194 return 0;
195 }
196
197 //by marshmellow
198 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
199 // (amp may not be needed anymore)
200 //verbose will print results and demoding messages
201 //emSearch will auto search for EM410x format in bitstream
202 //askType switches decode: ask/raw = 0, ask/manchester = 1
203 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
204 int invert=0;
205 int clk=0;
206 int maxErr=100;
207 int maxLen=0;
208 uint8_t askamp = 0;
209 char amp = param_getchar(Cmd, 0);
210 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
211 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
212 if (!maxLen) maxLen = BIGBUF_SIZE;
213 if (invert != 0 && invert != 1) {
214 PrintAndLog("Invalid argument: %s", Cmd);
215 return 0;
216 }
217 if (clk==1){
218 invert=1;
219 clk=0;
220 }
221 size_t BitLen = getFromGraphBuf(BitStream);
222 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
223 if (BitLen < 255) return 0;
224 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
225 int foundclk = 0;
226 //amp before ST check
227 if (amp == 'a' || amp == 'A') {
228 askAmp(BitStream, BitLen);
229 }
230 bool st = false;
231 size_t ststart = 0, stend = 0;
232 if (*stCheck) st = DetectST(BitStream, &BitLen, &foundclk, &ststart, &stend);
233 *stCheck = st;
234 if (st) {
235 clk = (clk == 0) ? foundclk : clk;
236 CursorCPos = ststart;
237 CursorDPos = stend;
238 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
239 //Graph ST trim (for testing)
240 //for (int i = 0; i < BitLen; i++) {
241 // GraphBuffer[i] = BitStream[i]-128;
242 //}
243 //RepaintGraphWindow();
244 }
245 int startIdx = 0;
246 int errCnt = askdemod_ext(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType, &startIdx);
247 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
248 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
249 return 0;
250 }
251 if (errCnt > maxErr){
252 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
253 return 0;
254 }
255 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
256 //output
257 setDemodBuf(BitStream,BitLen,0);
258 setClockGrid(clk, startIdx);
259
260 if (verbose || g_debugMode){
261 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
262 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
263 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
264 // Now output the bitstream to the scrollback by line of 16 bits
265 printDemodBuff();
266
267 }
268 uint64_t lo = 0;
269 uint32_t hi = 0;
270 if (emSearch){
271 AskEm410xDecode(true, &hi, &lo);
272 }
273 return 1;
274 }
275 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
276 bool st = false;
277 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
278 }
279
280 //by marshmellow
281 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
282 //attempts to demodulate ask while decoding manchester
283 //prints binary found and saves in graphbuffer for further commands
284 int Cmdaskmandemod(const char *Cmd)
285 {
286 char cmdp = param_getchar(Cmd, 0);
287 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
288 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
289 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
290 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
291 PrintAndLog(" <invert>, 1 to invert output");
292 PrintAndLog(" [set maximum allowed errors], default = 100");
293 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
294 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
295 PrintAndLog("");
296 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
297 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
298 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
299 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
300 PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
301 return 0;
302 }
303 bool st = true;
304 if (Cmd[0]=='s')
305 return ASKDemod_ext(Cmd++, true, false, 1, &st);
306 else if (Cmd[1] == 's')
307 return ASKDemod_ext(Cmd+=2, true, false, 1, &st);
308 else
309 return ASKDemod(Cmd, true, false, 1);
310 }
311
312 //by marshmellow
313 //manchester decode
314 //stricktly take 10 and 01 and convert to 0 and 1
315 int Cmdmandecoderaw(const char *Cmd)
316 {
317 int i =0;
318 int errCnt=0;
319 size_t size=0;
320 int invert=0;
321 int maxErr = 20;
322 char cmdp = param_getchar(Cmd, 0);
323 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
324 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
325 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
326 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
327 PrintAndLog(" [invert] invert output");
328 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
329 PrintAndLog("");
330 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
331 return 0;
332 }
333 if (DemodBufferLen==0) return 0;
334 uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
335 int high=0,low=0;
336 for (;i<DemodBufferLen;++i){
337 if (DemodBuffer[i]>high) high=DemodBuffer[i];
338 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
339 BitStream[i]=DemodBuffer[i];
340 }
341 if (high>7 || low <0 ){
342 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
343 return 0;
344 }
345
346 sscanf(Cmd, "%i %i", &invert, &maxErr);
347 size=i;
348 uint8_t alignPos = 0;
349 errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
350 if (errCnt>=maxErr){
351 PrintAndLog("Too many errors: %d",errCnt);
352 return 0;
353 }
354 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
355 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
356 if (errCnt==0){
357 uint64_t id = 0;
358 uint32_t hi = 0;
359 size_t idx=0;
360 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
361 //need to adjust to set bitstream back to manchester encoded data
362 //setDemodBuf(BitStream, size, idx);
363
364 printEM410x(hi, id);
365 }
366 }
367 return 1;
368 }
369
370 //by marshmellow
371 //biphase decode
372 //take 01 or 10 = 0 and 11 or 00 = 1
373 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
374 // and "invert" default = 0 if 1 it will invert output
375 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
376 int CmdBiphaseDecodeRaw(const char *Cmd)
377 {
378 size_t size=0;
379 int offset=0, invert=0, maxErr=20, errCnt=0;
380 char cmdp = param_getchar(Cmd, 0);
381 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
382 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
383 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
384 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
385 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
386 PrintAndLog("");
387 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
388 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
389 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
390 PrintAndLog("");
391 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
392 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
393 return 0;
394 }
395 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
396 if (DemodBufferLen==0) {
397 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
398 return 0;
399 }
400 uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
401 size = sizeof(BitStream);
402 if ( !getDemodBuf(BitStream, &size) ) return 0;
403 errCnt=BiphaseRawDecode(BitStream, &size, &offset, invert);
404 if (errCnt<0){
405 PrintAndLog("Error during decode:%d", errCnt);
406 return 0;
407 }
408 if (errCnt>maxErr){
409 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
410 return 0;
411 }
412
413 if (errCnt>0){
414 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
415 }
416
417 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
418 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
419
420 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
421 setClockGrid(g_DemodClock, g_DemodStartIdx + g_DemodClock*offset/2);
422 return 1;
423 }
424
425 //by marshmellow
426 // - ASK Demod then Biphase decode GraphBuffer samples
427 int ASKbiphaseDemod(const char *Cmd, bool verbose)
428 {
429 //ask raw demod GraphBuffer first
430 int offset=0, clk=0, invert=0, maxErr=0;
431 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
432
433 uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
434 size_t size = getFromGraphBuf(BitStream);
435 int startIdx = 0;
436 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
437 int errCnt = askdemod_ext(BitStream, &size, &clk, &invert, maxErr, 0, 0, &startIdx);
438 if ( errCnt < 0 || errCnt > maxErr ) {
439 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
440 return 0;
441 }
442
443 //attempt to Biphase decode BitStream
444 errCnt = BiphaseRawDecode(BitStream, &size, &offset, invert);
445 if (errCnt < 0){
446 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
447 return 0;
448 }
449 if (errCnt > maxErr) {
450 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
451 return 0;
452 }
453 //success set DemodBuffer and return
454 setDemodBuf(BitStream, size, 0);
455 setClockGrid(clk, startIdx + clk*offset/2);
456 if (g_debugMode || verbose){
457 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
458 printDemodBuff();
459 }
460 return 1;
461 }
462 //by marshmellow - see ASKbiphaseDemod
463 int Cmdaskbiphdemod(const char *Cmd)
464 {
465 char cmdp = param_getchar(Cmd, 0);
466 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
467 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
468 PrintAndLog(" [offset], offset to begin biphase, default=0");
469 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
470 PrintAndLog(" <invert>, 1 to invert output");
471 PrintAndLog(" [set maximum allowed errors], default = 100");
472 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
473 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
474 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
475 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
476 PrintAndLog(" NOTE: any other arg must have previous args set to work");
477 PrintAndLog("");
478 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
479 PrintAndLog("");
480 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
481 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
482 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
483 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
484 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
485 PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
486 PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
487 return 0;
488 }
489 return ASKbiphaseDemod(Cmd, true);
490 }
491
492 //by marshmellow - see ASKDemod
493 int Cmdaskrawdemod(const char *Cmd)
494 {
495 char cmdp = param_getchar(Cmd, 0);
496 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
497 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
498 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
499 PrintAndLog(" <invert>, 1 to invert output");
500 PrintAndLog(" [set maximum allowed errors], default = 100");
501 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
502 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
503 PrintAndLog("");
504 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
505 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
506 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
507 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
508 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
509 PrintAndLog(" : data rawdemod ar 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
510 PrintAndLog(" : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
511 return 0;
512 }
513 return ASKDemod(Cmd, true, false, 0);
514 }
515
516 int AutoCorrelate(const int *in, int *out, size_t len, int window, bool SaveGrph, bool verbose)
517 {
518 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
519 size_t Correlation = 0;
520 int maxSum = 0;
521 int lastMax = 0;
522 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
523 for (int i = 0; i < len - window; ++i) {
524 int sum = 0;
525 for (int j = 0; j < window; ++j) {
526 sum += (in[j]*in[i + j]) / 256;
527 }
528 CorrelBuffer[i] = sum;
529 if (sum >= maxSum-100 && sum <= maxSum+100) {
530 //another max
531 Correlation = i-lastMax;
532 lastMax = i;
533 if (sum > maxSum) maxSum = sum;
534 } else if (sum > maxSum) {
535 maxSum=sum;
536 lastMax = i;
537 }
538 }
539 if (Correlation==0) {
540 //try again with wider margin
541 for (int i = 0; i < len - window; i++) {
542 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)) {
543 //another max
544 Correlation = i-lastMax;
545 lastMax = i;
546 }
547 }
548 }
549 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
550
551 if (SaveGrph) {
552 //GraphTraceLen = GraphTraceLen - window;
553 memcpy(out, CorrelBuffer, len * sizeof(int));
554 RepaintGraphWindow();
555 }
556 return Correlation;
557 }
558
559 int usage_data_autocorr(void)
560 {
561 //print help
562 PrintAndLog("Usage: data autocorr [window] [g]");
563 PrintAndLog("Options: ");
564 PrintAndLog(" h This help");
565 PrintAndLog(" [window] window length for correlation - default = 4000");
566 PrintAndLog(" g save back to GraphBuffer (overwrite)");
567 return 0;
568 }
569
570 int CmdAutoCorr(const char *Cmd)
571 {
572 char cmdp = param_getchar(Cmd, 0);
573 if (cmdp == 'h' || cmdp == 'H')
574 return usage_data_autocorr();
575 int window = 4000; //set default
576 char grph=0;
577 bool updateGrph = false;
578 sscanf(Cmd, "%i %c", &window, &grph);
579
580 if (window >= GraphTraceLen) {
581 PrintAndLog("window must be smaller than trace (%d samples)",
582 GraphTraceLen);
583 return 0;
584 }
585 if (grph == 'g') updateGrph=true;
586 return AutoCorrelate(GraphBuffer, GraphBuffer, GraphTraceLen, window, updateGrph, true);
587 }
588
589 int CmdBitsamples(const char *Cmd)
590 {
591 int cnt = 0;
592 uint8_t got[12288];
593
594 GetFromBigBuf(got, sizeof(got), 0 , NULL, -1, false);
595
596 for (int j = 0; j < sizeof(got); j++) {
597 for (int k = 0; k < 8; k++) {
598 if(got[j] & (1 << (7 - k))) {
599 GraphBuffer[cnt++] = 1;
600 } else {
601 GraphBuffer[cnt++] = 0;
602 }
603 }
604 }
605 GraphTraceLen = cnt;
606 RepaintGraphWindow();
607 return 0;
608 }
609
610 int CmdBuffClear(const char *Cmd)
611 {
612 UsbCommand c = {CMD_BUFF_CLEAR};
613 SendCommand(&c);
614 ClearGraph(true);
615 return 0;
616 }
617
618 int CmdDec(const char *Cmd)
619 {
620 for (int i = 0; i < (GraphTraceLen / 2); ++i)
621 GraphBuffer[i] = GraphBuffer[i * 2];
622 GraphTraceLen /= 2;
623 PrintAndLog("decimated by 2");
624 RepaintGraphWindow();
625 return 0;
626 }
627 /**
628 * Undecimate - I'd call it 'interpolate', but we'll save that
629 * name until someone does an actual interpolation command, not just
630 * blindly repeating samples
631 * @param Cmd
632 * @return
633 */
634 int CmdUndec(const char *Cmd)
635 {
636 if(param_getchar(Cmd, 0) == 'h')
637 {
638 PrintAndLog("Usage: data undec [factor]");
639 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
640 PrintAndLog("Options: ");
641 PrintAndLog(" h This help");
642 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
643 PrintAndLog("Example: 'data undec 3'");
644 return 0;
645 }
646
647 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
648 //We have memory, don't we?
649 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
650 uint32_t g_index = 0, s_index = 0;
651 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
652 {
653 int count = 0;
654 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
655 swap[s_index+count] = GraphBuffer[g_index];
656
657 s_index += count;
658 g_index++;
659 }
660
661 memcpy(GraphBuffer, swap, s_index * sizeof(int));
662 GraphTraceLen = s_index;
663 RepaintGraphWindow();
664 return 0;
665 }
666
667 //by marshmellow
668 //shift graph zero up or down based on input + or -
669 int CmdGraphShiftZero(const char *Cmd)
670 {
671
672 int shift=0;
673 //set options from parameters entered with the command
674 sscanf(Cmd, "%i", &shift);
675 int shiftedVal=0;
676 for(int i = 0; i<GraphTraceLen; i++){
677 shiftedVal=GraphBuffer[i]+shift;
678 if (shiftedVal>127)
679 shiftedVal=127;
680 else if (shiftedVal<-127)
681 shiftedVal=-127;
682 GraphBuffer[i]= shiftedVal;
683 }
684 CmdNorm("");
685 return 0;
686 }
687
688 int AskEdgeDetect(const int *in, int *out, int len, int threshold) {
689 int Last = 0;
690 for(int i = 1; i<len; i++) {
691 if (in[i]-in[i-1] >= threshold) //large jump up
692 Last = 127;
693 else if(in[i]-in[i-1] <= -1 * threshold) //large jump down
694 Last = -127;
695 out[i-1] = Last;
696 }
697 return 0;
698 }
699
700 //by marshmellow
701 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
702 //similar to dirtheshold, threshold commands
703 //takes a threshold length which is the measured length between two samples then determines an edge
704 int CmdAskEdgeDetect(const char *Cmd)
705 {
706 int thresLen = 25;
707 int ans = 0;
708 sscanf(Cmd, "%i", &thresLen);
709
710 ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen);
711 RepaintGraphWindow();
712 return ans;
713 }
714
715 /* Print our clock rate */
716 // uses data from graphbuffer
717 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
718 int CmdDetectClockRate(const char *Cmd)
719 {
720 char cmdp = param_getchar(Cmd, 0);
721 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
722 PrintAndLog("Usage: data detectclock [modulation] <clock>");
723 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
724 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
725 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
726 PrintAndLog("");
727 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
728 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
729 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
730 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
731 }
732 int ans=0;
733 if (cmdp == 'a'){
734 ans = GetAskClock(Cmd+1, true, false);
735 } else if (cmdp == 'f'){
736 ans = GetFskClock("", true, false);
737 } else if (cmdp == 'n'){
738 ans = GetNrzClock("", true, false);
739 } else if (cmdp == 'p'){
740 ans = GetPskClock("", true, false);
741 } else {
742 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
743 }
744 return ans;
745 }
746
747 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
748 {
749 static char fType[8];
750 memset(fType, 0x00, 8);
751 char *fskType = fType;
752 if (fchigh==10 && fclow==8){
753 if (invert) //fsk2a
754 memcpy(fskType, "FSK2a", 5);
755 else //fsk2
756 memcpy(fskType, "FSK2", 4);
757 } else if (fchigh == 8 && fclow == 5) {
758 if (invert)
759 memcpy(fskType, "FSK1", 4);
760 else
761 memcpy(fskType, "FSK1a", 5);
762 } else {
763 memcpy(fskType, "FSK??", 5);
764 }
765 return fskType;
766 }
767
768 //by marshmellow
769 //fsk raw demod and print binary
770 //takes 4 arguments - Clock, invert, fchigh, fclow
771 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
772 int FSKrawDemod(const char *Cmd, bool verbose)
773 {
774 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
775 uint8_t rfLen, invert, fchigh, fclow;
776 //set defaults
777 //set options from parameters entered with the command
778 rfLen = param_get8(Cmd, 0);
779 invert = param_get8(Cmd, 1);
780 fchigh = param_get8(Cmd, 2);
781 fclow = param_get8(Cmd, 3);
782
783 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
784 if (rfLen==1) {
785 invert = 1; //if invert option only is used
786 rfLen = 0;
787 }
788 }
789 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
790 size_t BitLen = getFromGraphBuf(BitStream);
791 if (BitLen==0) return 0;
792 //get field clock lengths
793 uint16_t fcs=0;
794 if (!fchigh || !fclow) {
795 fcs = countFC(BitStream, BitLen, 1);
796 if (!fcs) {
797 fchigh = 10;
798 fclow = 8;
799 } else {
800 fchigh = (fcs >> 8) & 0x00FF;
801 fclow = fcs & 0x00FF;
802 }
803 }
804 //get bit clock length
805 if (!rfLen) {
806 int firstClockEdge = 0; //todo - align grid on graph with this...
807 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge);
808 if (!rfLen) rfLen = 50;
809 }
810 int startIdx = 0;
811 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow, &startIdx);
812 if (size > 0) {
813 setDemodBuf(BitStream,size,0);
814 setClockGrid(rfLen, startIdx);
815
816 // Now output the bitstream to the scrollback by line of 16 bits
817 if (verbose || g_debugMode) {
818 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
819 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
820 printDemodBuff();
821 }
822
823 return 1;
824 } else {
825 if (g_debugMode) PrintAndLog("no FSK data found");
826 }
827 return 0;
828 }
829
830 //by marshmellow
831 //fsk raw demod and print binary
832 //takes 4 arguments - Clock, invert, fchigh, fclow
833 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
834 int CmdFSKrawdemod(const char *Cmd)
835 {
836 char cmdp = param_getchar(Cmd, 0);
837 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
838 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
839 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
840 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
841 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
842 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
843 PrintAndLog("");
844 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
845 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
846 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
847 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
848 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
849 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
850 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
851 return 0;
852 }
853 return FSKrawDemod(Cmd, true);
854 }
855
856 //by marshmellow
857 //attempt to psk1 demod graph buffer
858 int PSKDemod(const char *Cmd, bool verbose)
859 {
860 int invert=0;
861 int clk=0;
862 int maxErr=100;
863 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
864 if (clk==1){
865 invert=1;
866 clk=0;
867 }
868 if (invert != 0 && invert != 1) {
869 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
870 return 0;
871 }
872 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
873 size_t BitLen = getFromGraphBuf(BitStream);
874 if (BitLen==0) return 0;
875 int errCnt=0;
876 int startIdx = 0;
877 errCnt = pskRawDemod_ext(BitStream, &BitLen, &clk, &invert, &startIdx);
878 if (errCnt > maxErr){
879 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
880 return 0;
881 }
882 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
883 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
884 return 0;
885 }
886 if (verbose || g_debugMode){
887 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
888 if (errCnt>0){
889 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
890 }
891 }
892 //prime demod buffer for output
893 setDemodBuf(BitStream,BitLen,0);
894 setClockGrid(clk, startIdx);
895
896 return 1;
897 }
898
899 // by marshmellow
900 // takes 3 arguments - clock, invert, maxErr as integers
901 // attempts to demodulate nrz only
902 // prints binary found and saves in demodbuffer for further commands
903 int NRZrawDemod(const char *Cmd, bool verbose)
904 {
905 int invert=0;
906 int clk=0;
907 int maxErr=100;
908 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
909 if (clk==1){
910 invert=1;
911 clk=0;
912 }
913 if (invert != 0 && invert != 1) {
914 PrintAndLog("Invalid argument: %s", Cmd);
915 return 0;
916 }
917 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
918 size_t BitLen = getFromGraphBuf(BitStream);
919 if (BitLen==0) return 0;
920 int errCnt=0;
921 int clkStartIdx = 0;
922 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
923 if (errCnt > maxErr){
924 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
925 return 0;
926 }
927 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
928 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
929 return 0;
930 }
931 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
932 //prime demod buffer for output
933 setDemodBuf(BitStream,BitLen,0);
934 setClockGrid(clk, clkStartIdx);
935
936
937 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
938 if (verbose || g_debugMode) {
939 PrintAndLog("NRZ demoded bitstream:");
940 // Now output the bitstream to the scrollback by line of 16 bits
941 printDemodBuff();
942 }
943 return 1;
944 }
945
946 int CmdNRZrawDemod(const char *Cmd)
947 {
948 char cmdp = param_getchar(Cmd, 0);
949 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
950 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
951 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
952 PrintAndLog(" <invert>, 1 for invert output");
953 PrintAndLog(" [set maximum allowed errors], default = 100.");
954 PrintAndLog("");
955 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
956 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
957 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
958 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
959 PrintAndLog(" : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
960 return 0;
961 }
962 return NRZrawDemod(Cmd, true);
963 }
964
965 // by marshmellow
966 // takes 3 arguments - clock, invert, maxErr as integers
967 // attempts to demodulate psk only
968 // prints binary found and saves in demodbuffer for further commands
969 int CmdPSK1rawDemod(const char *Cmd)
970 {
971 int ans;
972 char cmdp = param_getchar(Cmd, 0);
973 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
974 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
975 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
976 PrintAndLog(" <invert>, 1 for invert output");
977 PrintAndLog(" [set maximum allowed errors], default = 100.");
978 PrintAndLog("");
979 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
980 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
981 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
982 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
983 PrintAndLog(" : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
984 return 0;
985 }
986 ans = PSKDemod(Cmd, true);
987 //output
988 if (!ans){
989 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
990 return 0;
991 }
992
993 PrintAndLog("PSK1 demoded bitstream:");
994 // Now output the bitstream to the scrollback by line of 16 bits
995 printDemodBuff();
996 return 1;
997 }
998
999 // by marshmellow
1000 // takes same args as cmdpsk1rawdemod
1001 int CmdPSK2rawDemod(const char *Cmd)
1002 {
1003 int ans=0;
1004 char cmdp = param_getchar(Cmd, 0);
1005 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1006 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1007 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1008 PrintAndLog(" <invert>, 1 for invert output");
1009 PrintAndLog(" [set maximum allowed errors], default = 100.");
1010 PrintAndLog("");
1011 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1012 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1013 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1014 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1015 PrintAndLog(" : data rawdemod p2 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
1016 return 0;
1017 }
1018 ans=PSKDemod(Cmd, true);
1019 if (!ans){
1020 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1021 return 0;
1022 }
1023 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1024 PrintAndLog("PSK2 demoded bitstream:");
1025 // Now output the bitstream to the scrollback by line of 16 bits
1026 printDemodBuff();
1027 return 1;
1028 }
1029
1030 // by marshmellow - combines all raw demod functions into one menu command
1031 int CmdRawDemod(const char *Cmd)
1032 {
1033 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1034
1035 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1036 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1037 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1038 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1039 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1040 PrintAndLog(" <options> see specific modulation help for optional parameters");
1041 PrintAndLog("");
1042 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1043 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1044 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1045 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1046 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1047 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1048 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1049 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1050 return 0;
1051 }
1052 char cmdp2 = Cmd[1];
1053 int ans = 0;
1054 if (cmdp == 'f' && cmdp2 == 's'){
1055 ans = CmdFSKrawdemod(Cmd+2);
1056 } else if(cmdp == 'a' && cmdp2 == 'b'){
1057 ans = Cmdaskbiphdemod(Cmd+2);
1058 } else if(cmdp == 'a' && cmdp2 == 'm'){
1059 ans = Cmdaskmandemod(Cmd+2);
1060 } else if(cmdp == 'a' && cmdp2 == 'r'){
1061 ans = Cmdaskrawdemod(Cmd+2);
1062 } else if(cmdp == 'n' && cmdp2 == 'r'){
1063 ans = CmdNRZrawDemod(Cmd+2);
1064 } else if(cmdp == 'p' && cmdp2 == '1'){
1065 ans = CmdPSK1rawDemod(Cmd+2);
1066 } else if(cmdp == 'p' && cmdp2 == '2'){
1067 ans = CmdPSK2rawDemod(Cmd+2);
1068 } else {
1069 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1070 }
1071 return ans;
1072 }
1073
1074 void setClockGrid(int clk, int offset) {
1075 g_DemodStartIdx = offset;
1076 g_DemodClock = clk;
1077 if (g_debugMode) PrintAndLog("demodoffset %d, clk %d",offset,clk);
1078
1079 if (offset > clk) offset %= clk;
1080 if (offset < 0) offset += clk;
1081
1082 if (offset > GraphTraceLen || offset < 0) return;
1083 if (clk < 8 || clk > GraphTraceLen) {
1084 GridLocked = false;
1085 GridOffset = 0;
1086 PlotGridX = 0;
1087 PlotGridXdefault = 0;
1088 RepaintGraphWindow();
1089 } else {
1090 GridLocked = true;
1091 GridOffset = offset;
1092 PlotGridX = clk;
1093 PlotGridXdefault = clk;
1094 RepaintGraphWindow();
1095 }
1096 }
1097
1098 int CmdGrid(const char *Cmd)
1099 {
1100 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1101 PlotGridXdefault= PlotGridX;
1102 PlotGridYdefault= PlotGridY;
1103 RepaintGraphWindow();
1104 return 0;
1105 }
1106
1107 int CmdSetGraphMarkers(const char *Cmd) {
1108 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1109 RepaintGraphWindow();
1110 return 0;
1111 }
1112
1113 int CmdHexsamples(const char *Cmd)
1114 {
1115 int i, j;
1116 int requested = 0;
1117 int offset = 0;
1118 char string_buf[25];
1119 char* string_ptr = string_buf;
1120 uint8_t got[BIGBUF_SIZE];
1121
1122 sscanf(Cmd, "%i %i", &requested, &offset);
1123
1124 /* if no args send something */
1125 if (requested == 0) {
1126 requested = 8;
1127 }
1128 if (offset + requested > sizeof(got)) {
1129 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1130 return 0;
1131 }
1132
1133 GetFromBigBuf(got, requested, offset, NULL, -1, false);
1134
1135 i = 0;
1136 for (j = 0; j < requested; j++) {
1137 i++;
1138 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1139 if (i == 8) {
1140 *(string_ptr - 1) = '\0'; // remove the trailing space
1141 PrintAndLog("%s", string_buf);
1142 string_buf[0] = '\0';
1143 string_ptr = string_buf;
1144 i = 0;
1145 }
1146 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1147 *(string_ptr - 1) = '\0';
1148 PrintAndLog("%s", string_buf);
1149 string_buf[0] = '\0';
1150 }
1151 }
1152 return 0;
1153 }
1154
1155 int CmdHide(const char *Cmd)
1156 {
1157 HideGraphWindow();
1158 return 0;
1159 }
1160
1161 //zero mean GraphBuffer
1162 int CmdHpf(const char *Cmd)
1163 {
1164 int i;
1165 int accum = 0;
1166
1167 for (i = 10; i < GraphTraceLen; ++i)
1168 accum += GraphBuffer[i];
1169 accum /= (GraphTraceLen - 10);
1170 for (i = 0; i < GraphTraceLen; ++i)
1171 GraphBuffer[i] -= accum;
1172
1173 RepaintGraphWindow();
1174 return 0;
1175 }
1176
1177 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1178 {
1179 int i;
1180 uint8_t val = 0;
1181 for(i =0 ; i < bits_per_sample; i++)
1182 {
1183 val |= (headBit(b) << (7-i));
1184 }
1185 return val;
1186 }
1187
1188 int getSamples(int n, bool silent)
1189 {
1190 //If we get all but the last byte in bigbuf,
1191 // we don't have to worry about remaining trash
1192 // in the last byte in case the bits-per-sample
1193 // does not line up on byte boundaries
1194
1195 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1196
1197 if (n == 0 || n > sizeof(got))
1198 n = sizeof(got);
1199
1200 if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n);
1201 UsbCommand response;
1202 GetFromBigBuf(got, n, 0, &response, -1, false);
1203 if (!silent) PrintAndLog("Data fetched");
1204 uint8_t bits_per_sample = 8;
1205
1206 //Old devices without this feature would send 0 at arg[0]
1207 if(response.arg[0] > 0)
1208 {
1209 sample_config *sc = (sample_config *) response.d.asBytes;
1210 if (!silent) PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1211 , sc->decimation);
1212 bits_per_sample = sc->bits_per_sample;
1213 }
1214 if(bits_per_sample < 8)
1215 {
1216 if (!silent) PrintAndLog("Unpacking...");
1217 BitstreamIn bout = { got, bits_per_sample * n, 0};
1218 int j =0;
1219 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1220 uint8_t sample = getByte(bits_per_sample, &bout);
1221 GraphBuffer[j] = ((int) sample )- 128;
1222 }
1223 GraphTraceLen = j;
1224 PrintAndLog("Unpacked %d samples" , j );
1225 }else
1226 {
1227 for (int j = 0; j < n; j++) {
1228 GraphBuffer[j] = ((int)got[j]) - 128;
1229 }
1230 GraphTraceLen = n;
1231 }
1232
1233 setClockGrid(0,0);
1234 DemodBufferLen = 0;
1235 RepaintGraphWindow();
1236 return 0;
1237 }
1238
1239 int CmdSamples(const char *Cmd)
1240 {
1241 int n = strtol(Cmd, NULL, 0);
1242 return getSamples(n, false);
1243 }
1244
1245 int CmdTuneSamples(const char *Cmd)
1246 {
1247 int timeout = 0, arg = FLAG_TUNE_ALL;
1248
1249 if(*Cmd == 'l') {
1250 arg = FLAG_TUNE_LF;
1251 } else if (*Cmd == 'h') {
1252 arg = FLAG_TUNE_HF;
1253 } else if (*Cmd != '\0') {
1254 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1255 return 0;
1256 }
1257
1258 printf("\nMeasuring antenna characteristics, please wait...");
1259
1260 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1261 SendCommand(&c);
1262
1263 UsbCommand resp;
1264 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1265 timeout++;
1266 printf(".");
1267 if (timeout > 7) {
1268 PrintAndLog("\nNo response from Proxmark. Aborting...");
1269 return 1;
1270 }
1271 }
1272
1273 int peakv, peakf;
1274 int vLf125, vLf134, vHf;
1275 vLf125 = resp.arg[0] & 0xffff;
1276 vLf134 = resp.arg[0] >> 16;
1277 vHf = resp.arg[1] & 0xffff;;
1278 peakf = resp.arg[2] & 0xffff;
1279 peakv = resp.arg[2] >> 16;
1280 PrintAndLog("");
1281 if (arg & FLAG_TUNE_LF)
1282 {
1283 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/500.0);
1284 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/500.0);
1285 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/500.0, 12000.0/(peakf+1));
1286 }
1287 if (arg & FLAG_TUNE_HF)
1288 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1289
1290 #define LF_UNUSABLE_V 3000
1291 #define LF_MARGINAL_V 15000
1292 #define HF_UNUSABLE_V 3200
1293 #define HF_MARGINAL_V 8000
1294
1295 if (arg & FLAG_TUNE_LF)
1296 {
1297 if (peakv<<1 < LF_UNUSABLE_V)
1298 PrintAndLog("# Your LF antenna is unusable.");
1299 else if (peakv<<1 < LF_MARGINAL_V)
1300 PrintAndLog("# Your LF antenna is marginal.");
1301 }
1302 if (arg & FLAG_TUNE_HF)
1303 {
1304 if (vHf < HF_UNUSABLE_V)
1305 PrintAndLog("# Your HF antenna is unusable.");
1306 else if (vHf < HF_MARGINAL_V)
1307 PrintAndLog("# Your HF antenna is marginal.");
1308 }
1309
1310 if (peakv<<1 >= LF_UNUSABLE_V) {
1311 for (int i = 0; i < 256; i++) {
1312 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1313 }
1314 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1315 PrintAndLog("\n");
1316 GraphTraceLen = 256;
1317 ShowGraphWindow();
1318 RepaintGraphWindow();
1319 }
1320
1321 return 0;
1322 }
1323
1324
1325 int CmdLoad(const char *Cmd)
1326 {
1327 char filename[FILE_PATH_SIZE] = {0x00};
1328 int len = 0;
1329
1330 len = strlen(Cmd);
1331 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1332 memcpy(filename, Cmd, len);
1333
1334 FILE *f = fopen(filename, "r");
1335 if (!f) {
1336 PrintAndLog("couldn't open '%s'", filename);
1337 return 0;
1338 }
1339
1340 GraphTraceLen = 0;
1341 char line[80];
1342 while (fgets(line, sizeof (line), f)) {
1343 GraphBuffer[GraphTraceLen] = atoi(line);
1344 GraphTraceLen++;
1345 }
1346 fclose(f);
1347 PrintAndLog("loaded %d samples", GraphTraceLen);
1348 setClockGrid(0,0);
1349 DemodBufferLen = 0;
1350 RepaintGraphWindow();
1351 return 0;
1352 }
1353
1354 int CmdLtrim(const char *Cmd)
1355 {
1356 int ds = atoi(Cmd);
1357 if (GraphTraceLen<=0) return 0;
1358 for (int i = ds; i < GraphTraceLen; ++i)
1359 GraphBuffer[i-ds] = GraphBuffer[i];
1360 GraphTraceLen -= ds;
1361
1362 RepaintGraphWindow();
1363 return 0;
1364 }
1365
1366 // trim graph to input argument length
1367 int CmdRtrim(const char *Cmd)
1368 {
1369 int ds = atoi(Cmd);
1370
1371 GraphTraceLen = ds;
1372
1373 RepaintGraphWindow();
1374 return 0;
1375 }
1376
1377 // trim graph (middle) piece
1378 int CmdMtrim(const char *Cmd) {
1379 int start = 0, stop = 0;
1380 sscanf(Cmd, "%i %i", &start, &stop);
1381
1382 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1383 start++; //leave start position sample
1384
1385 GraphTraceLen = stop - start;
1386 for (int i = 0; i < GraphTraceLen; i++) {
1387 GraphBuffer[i] = GraphBuffer[start+i];
1388 }
1389 return 0;
1390 }
1391
1392
1393 int CmdNorm(const char *Cmd)
1394 {
1395 int i;
1396 int max = INT_MIN, min = INT_MAX;
1397
1398 for (i = 10; i < GraphTraceLen; ++i) {
1399 if (GraphBuffer[i] > max)
1400 max = GraphBuffer[i];
1401 if (GraphBuffer[i] < min)
1402 min = GraphBuffer[i];
1403 }
1404
1405 if (max != min) {
1406 for (i = 0; i < GraphTraceLen; ++i) {
1407 GraphBuffer[i] = ((long)(GraphBuffer[i] - ((max + min) / 2)) * 256) / (max - min);
1408 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1409 }
1410 }
1411 RepaintGraphWindow();
1412 return 0;
1413 }
1414
1415 int CmdPlot(const char *Cmd)
1416 {
1417 ShowGraphWindow();
1418 return 0;
1419 }
1420
1421 int CmdSave(const char *Cmd)
1422 {
1423 char filename[FILE_PATH_SIZE] = {0x00};
1424 int len = 0;
1425
1426 len = strlen(Cmd);
1427 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1428 memcpy(filename, Cmd, len);
1429
1430
1431 FILE *f = fopen(filename, "w");
1432 if(!f) {
1433 PrintAndLog("couldn't open '%s'", filename);
1434 return 0;
1435 }
1436 int i;
1437 for (i = 0; i < GraphTraceLen; i++) {
1438 fprintf(f, "%d\n", GraphBuffer[i]);
1439 }
1440 fclose(f);
1441 PrintAndLog("saved to '%s'", Cmd);
1442 return 0;
1443 }
1444
1445 int CmdScale(const char *Cmd)
1446 {
1447 CursorScaleFactor = atoi(Cmd);
1448 if (CursorScaleFactor == 0) {
1449 PrintAndLog("bad, can't have zero scale");
1450 CursorScaleFactor = 1;
1451 }
1452 RepaintGraphWindow();
1453 return 0;
1454 }
1455
1456 int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down)
1457 {
1458 int lastValue = in[0];
1459 out[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1460
1461 for (int i = 1; i < len; ++i) {
1462 // Apply first threshold to samples heading up
1463 if (in[i] >= up && in[i] > lastValue)
1464 {
1465 lastValue = out[i]; // Buffer last value as we overwrite it.
1466 out[i] = 1;
1467 }
1468 // Apply second threshold to samples heading down
1469 else if (in[i] <= down && in[i] < lastValue)
1470 {
1471 lastValue = out[i]; // Buffer last value as we overwrite it.
1472 out[i] = -1;
1473 }
1474 else
1475 {
1476 lastValue = out[i]; // Buffer last value as we overwrite it.
1477 out[i] = out[i-1];
1478 }
1479 }
1480 out[0] = out[1]; // Align with first edited sample.
1481 return 0;
1482 }
1483
1484 int CmdDirectionalThreshold(const char *Cmd)
1485 {
1486 int8_t upThres = param_get8(Cmd, 0);
1487 int8_t downThres = param_get8(Cmd, 1);
1488
1489 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1490
1491 directionalThreshold(GraphBuffer, GraphBuffer,GraphTraceLen, upThres, downThres);
1492 RepaintGraphWindow();
1493 return 0;
1494 }
1495
1496 int CmdZerocrossings(const char *Cmd)
1497 {
1498 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1499 CmdHpf("");
1500
1501 int sign = 1;
1502 int zc = 0;
1503 int lastZc = 0;
1504
1505 for (int i = 0; i < GraphTraceLen; ++i) {
1506 if (GraphBuffer[i] * sign >= 0) {
1507 // No change in sign, reproduce the previous sample count.
1508 zc++;
1509 GraphBuffer[i] = lastZc;
1510 } else {
1511 // Change in sign, reset the sample count.
1512 sign = -sign;
1513 GraphBuffer[i] = lastZc;
1514 if (sign > 0) {
1515 lastZc = zc;
1516 zc = 0;
1517 }
1518 }
1519 }
1520
1521 RepaintGraphWindow();
1522 return 0;
1523 }
1524
1525 int usage_data_bin2hex(){
1526 PrintAndLog("Usage: data bin2hex <binary_digits>");
1527 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1528 return 0;
1529 }
1530
1531 /**
1532 * @brief Utility for conversion via cmdline.
1533 * @param Cmd
1534 * @return
1535 */
1536 int Cmdbin2hex(const char *Cmd)
1537 {
1538 int bg =0, en =0;
1539 if(param_getptr(Cmd, &bg, &en, 0))
1540 {
1541 return usage_data_bin2hex();
1542 }
1543 //Number of digits supplied as argument
1544 size_t length = en - bg +1;
1545 size_t bytelen = (length+7) / 8;
1546 uint8_t* arr = (uint8_t *) malloc(bytelen);
1547 memset(arr, 0, bytelen);
1548 BitstreamOut bout = { arr, 0, 0 };
1549
1550 for(; bg <= en ;bg++)
1551 {
1552 char c = Cmd[bg];
1553 if( c == '1') pushBit(&bout, 1);
1554 else if( c == '0') pushBit(&bout, 0);
1555 else PrintAndLog("Ignoring '%c'", c);
1556 }
1557
1558 if(bout.numbits % 8 != 0)
1559 {
1560 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1561 }
1562
1563 //Uses printf instead of PrintAndLog since the latter
1564 // adds linebreaks to each printout - this way was more convenient since we don't have to
1565 // allocate a string and write to that first...
1566 for(size_t x = 0; x < bytelen ; x++)
1567 {
1568 printf("%02X", arr[x]);
1569 }
1570 printf("\n");
1571 free(arr);
1572 return 0;
1573 }
1574
1575 int usage_data_hex2bin() {
1576 PrintAndLog("Usage: data hex2bin <hex_digits>");
1577 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1578 return 0;
1579
1580 }
1581
1582 int Cmdhex2bin(const char *Cmd)
1583 {
1584 int bg =0, en =0;
1585 if(param_getptr(Cmd, &bg, &en, 0))
1586 {
1587 return usage_data_hex2bin();
1588 }
1589
1590
1591 while(bg <= en )
1592 {
1593 char x = Cmd[bg++];
1594 // capitalize
1595 if (x >= 'a' && x <= 'f')
1596 x -= 32;
1597 // convert to numeric value
1598 if (x >= '0' && x <= '9')
1599 x -= '0';
1600 else if (x >= 'A' && x <= 'F')
1601 x -= 'A' - 10;
1602 else
1603 continue;
1604
1605 //Uses printf instead of PrintAndLog since the latter
1606 // adds linebreaks to each printout - this way was more convenient since we don't have to
1607 // allocate a string and write to that first...
1608
1609 for(int i= 0 ; i < 4 ; ++i)
1610 printf("%d",(x >> (3 - i)) & 1);
1611 }
1612 printf("\n");
1613
1614 return 0;
1615 }
1616
1617 /* // example of FSK2 RF/50 Tones
1618 static const int LowTone[] = {
1619 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1620 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1621 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1622 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1623 1, 1, 1, 1, 1, -1, -1, -1, -1, -1
1624 };
1625 static const int HighTone[] = {
1626 1, 1, 1, 1, 1, -1, -1, -1, -1, // note one extra 1 to padd due to 50/8 remainder (1/2 the remainder)
1627 1, 1, 1, 1, -1, -1, -1, -1,
1628 1, 1, 1, 1, -1, -1, -1, -1,
1629 1, 1, 1, 1, -1, -1, -1, -1,
1630 1, 1, 1, 1, -1, -1, -1, -1,
1631 1, 1, 1, 1, -1, -1, -1, -1, -1, // note one extra -1 to padd due to 50/8 remainder
1632 };
1633 */
1634 void GetHiLoTone(int *LowTone, int *HighTone, int clk, int LowToneFC, int HighToneFC) {
1635 int i,j=0;
1636 int Left_Modifier = ((clk % LowToneFC) % 2) + ((clk % LowToneFC)/2);
1637 int Right_Modifier = (clk % LowToneFC) / 2;
1638 //int HighToneMod = clk mod HighToneFC;
1639 int LeftHalfFCCnt = (LowToneFC % 2) + (LowToneFC/2); //truncate
1640 int FCs_per_clk = clk/LowToneFC;
1641
1642 // need to correctly split up the clock to field clocks.
1643 // First attempt uses modifiers on each end to make up for when FCs don't evenly divide into Clk
1644
1645 // start with LowTone
1646 // set extra 1 modifiers to make up for when FC doesn't divide evenly into Clk
1647 for (i = 0; i < Left_Modifier; i++) {
1648 LowTone[i] = 1;
1649 }
1650
1651 // loop # of field clocks inside the main clock
1652 for (i = 0; i < (FCs_per_clk); i++) {
1653 // loop # of samples per field clock
1654 for (j = 0; j < LowToneFC; j++) {
1655 LowTone[(i*LowToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
1656 }
1657 }
1658
1659 int k;
1660 // add last -1 modifiers
1661 for (k = 0; k < Right_Modifier; k++) {
1662 LowTone[((i-1)*LowToneFC)+Left_Modifier+j+k] = -1;
1663 }
1664
1665 // now do hightone
1666 Left_Modifier = ((clk % HighToneFC) % 2) + ((clk % HighToneFC)/2);
1667 Right_Modifier = (clk % HighToneFC) / 2;
1668 LeftHalfFCCnt = (HighToneFC % 2) + (HighToneFC/2); //truncate
1669 FCs_per_clk = clk/HighToneFC;
1670
1671 for (i = 0; i < Left_Modifier; i++) {
1672 HighTone[i] = 1;
1673 }
1674
1675 // loop # of field clocks inside the main clock
1676 for (i = 0; i < (FCs_per_clk); i++) {
1677 // loop # of samples per field clock
1678 for (j = 0; j < HighToneFC; j++) {
1679 HighTone[(i*HighToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
1680 }
1681 }
1682
1683 // add last -1 modifiers
1684 for (k = 0; k < Right_Modifier; k++) {
1685 PrintAndLog("(i-1)*HighToneFC+lm+j+k %i",((i-1)*HighToneFC)+Left_Modifier+j+k);
1686 HighTone[((i-1)*HighToneFC)+Left_Modifier+j+k] = -1;
1687 }
1688 if (g_debugMode == 2) {
1689 for ( i = 0; i < clk; i++) {
1690 PrintAndLog("Low: %i, High: %i",LowTone[i],HighTone[i]);
1691 }
1692 }
1693 }
1694
1695 //old CmdFSKdemod adapted by marshmellow
1696 //converts FSK to clear NRZ style wave. (or demodulates)
1697 int FSKToNRZ(int *data, int *dataLen, int clk, int LowToneFC, int HighToneFC) {
1698 uint8_t ans=0;
1699 if (clk == 0 || LowToneFC == 0 || HighToneFC == 0) {
1700 int firstClockEdge=0;
1701 ans = fskClocks((uint8_t *) &LowToneFC, (uint8_t *) &HighToneFC, (uint8_t *) &clk, false, &firstClockEdge);
1702 if (g_debugMode > 1) {
1703 PrintAndLog ("DEBUG FSKtoNRZ: detected clocks: fc_low %i, fc_high %i, clk %i, firstClockEdge %i, ans %u", LowToneFC, HighToneFC, clk, firstClockEdge, ans);
1704 }
1705 }
1706 // currently only know fsk modulations with field clocks < 10 samples and > 4 samples. filter out to remove false positives (and possibly destroying ask/psk modulated waves...)
1707 if (ans == 0 || clk == 0 || LowToneFC == 0 || HighToneFC == 0 || LowToneFC > 10 || HighToneFC < 4) {
1708 if (g_debugMode > 1) {
1709 PrintAndLog ("DEBUG FSKtoNRZ: no fsk clocks found");
1710 }
1711 return 0;
1712 }
1713 int LowTone[clk];
1714 int HighTone[clk];
1715 GetHiLoTone(LowTone, HighTone, clk, LowToneFC, HighToneFC);
1716
1717 int i, j;
1718
1719 // loop through ([all samples] - clk)
1720 for (i = 0; i < *dataLen - clk; ++i) {
1721 int lowSum = 0, highSum = 0;
1722
1723 // sum all samples together starting from this sample for [clk] samples for each tone (multiply tone value with sample data)
1724 for (j = 0; j < clk; ++j) {
1725 lowSum += LowTone[j] * data[i+j];
1726 highSum += HighTone[j] * data[i + j];
1727 }
1728 // get abs( [average sample value per clk] * 100 ) (or a rolling average of sorts)
1729 lowSum = abs(100 * lowSum / clk);
1730 highSum = abs(100 * highSum / clk);
1731 // save these back to buffer for later use
1732 data[i] = (highSum << 16) | lowSum;
1733 }
1734
1735 // now we have the abs( [average sample value per clk] * 100 ) for each tone
1736 // loop through again [all samples] - clk - 16
1737 // note why 16??? is 16 the largest FC? changed to LowToneFC as that should be the > fc
1738 for(i = 0; i < *dataLen - clk - LowToneFC; ++i) {
1739 int lowTot = 0, highTot = 0;
1740
1741 // sum a field clock width of abs( [average sample values per clk] * 100) for each tone
1742 for (j = 0; j < LowToneFC; ++j) { //10 for fsk2
1743 lowTot += (data[i + j] & 0xffff);
1744 }
1745 for (j = 0; j < HighToneFC; j++) { //8 for fsk2
1746 highTot += (data[i + j] >> 16);
1747 }
1748
1749 // subtract the sum of lowTone averages by the sum of highTone averages as it
1750 // and write back the new graph value
1751 data[i] = lowTot - highTot;
1752 }
1753 // update dataLen to what we put back to the data sample buffer
1754 *dataLen -= (clk + LowToneFC);
1755 return 0;
1756 }
1757
1758 int usage_data_fsktonrz() {
1759 PrintAndLog("Usage: data fsktonrz c <clock> l <fc_low> f <fc_high>");
1760 PrintAndLog("Options: ");
1761 PrintAndLog(" h This help");
1762 PrintAndLog(" c <clock> enter the a clock (omit to autodetect)");
1763 PrintAndLog(" l <fc_low> enter a field clock (omit to autodetect)");
1764 PrintAndLog(" f <fc_high> enter a field clock (omit to autodetect)");
1765 return 0;
1766 }
1767
1768 int CmdFSKToNRZ(const char *Cmd) {
1769 // take clk, fc_low, fc_high
1770 // blank = auto;
1771 bool errors = false;
1772 int clk = 0;
1773 char cmdp = 0;
1774 int fc_low = 10, fc_high = 8;
1775 while(param_getchar(Cmd, cmdp) != 0x00)
1776 {
1777 switch(param_getchar(Cmd, cmdp))
1778 {
1779 case 'h':
1780 case 'H':
1781 return usage_data_fsktonrz();
1782 case 'C':
1783 case 'c':
1784 clk = param_get32ex(Cmd, cmdp+1, 0, 10);
1785 cmdp += 2;
1786 break;
1787 case 'F':
1788 case 'f':
1789 fc_high = param_get32ex(Cmd, cmdp+1, 0, 10);
1790 cmdp += 2;
1791 break;
1792 case 'L':
1793 case 'l':
1794 fc_low = param_get32ex(Cmd, cmdp+1, 0, 10);
1795 cmdp += 2;
1796 break;
1797 default:
1798 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
1799 errors = true;
1800 break;
1801 }
1802 if(errors) break;
1803 }
1804 //Validations
1805 if(errors) return usage_data_fsktonrz();
1806
1807 setClockGrid(0,0);
1808 DemodBufferLen = 0;
1809 int ans = FSKToNRZ(GraphBuffer, &GraphTraceLen, clk, fc_low, fc_high);
1810 CmdNorm("");
1811 RepaintGraphWindow();
1812 return ans;
1813 }
1814
1815
1816 static command_t CommandTable[] =
1817 {
1818 {"help", CmdHelp, 1, "This help"},
1819 {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"},
1820 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1821 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1822 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1823 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1824 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1825 {"dec", CmdDec, 1, "Decimate samples"},
1826 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1827 {"fsktonrz", CmdFSKToNRZ, 1, "Convert fsk2 to nrz wave for alternate fsk demodulating (for weak fsk)"},
1828 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1829 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1830 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1831 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1832 {"hide", CmdHide, 1, "Hide graph window"},
1833 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1834 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1835 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1836 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1837 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1838 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1839 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1840 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1841 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1842 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1843 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1844 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1845 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1846 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1847 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1848 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1849 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1850 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1851 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1852 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1853 {NULL, NULL, 0, NULL}
1854 };
1855
1856 int CmdData(const char *Cmd)
1857 {
1858 CmdsParse(CommandTable, Cmd);
1859 return 0;
1860 }
1861
1862 int CmdHelp(const char *Cmd)
1863 {
1864 CmdsHelp(CommandTable);
1865 return 0;
1866 }
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