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Merge pull request #876 from pwpiwi/fix_iclass_reader
[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 /**
371 * @author marshmellow
372 * biphase decode
373 * decdoes 01 or 10 to 0 and 11 or 00 to 1
374 * param offset adjust start position
375 * param invert invert output
376 * param maxErr maximum tolerated errors
377 */
378 int CmdBiphaseDecodeRaw(const char *Cmd)
379 {
380 size_t size=0;
381 int offset=0, invert=0, maxErr=20, errCnt=0;
382 char cmdp = param_getchar(Cmd, 0);
383 if (strlen(Cmd) > 7 || cmdp == 'h' || cmdp == 'H') {
384 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
385 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
386 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
387 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
388 PrintAndLog("");
389 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
390 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
391 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
392 PrintAndLog("");
393 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
394 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
395 return 0;
396 }
397 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
398 if (DemodBufferLen==0) {
399 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
400 return 0;
401 }
402 uint8_t BitStream[MAX_DEMOD_BUF_LEN]={0};
403 size = sizeof(BitStream);
404 if ( !getDemodBuf(BitStream, &size) ) return 0;
405 errCnt=BiphaseRawDecode(BitStream, &size, &offset, invert);
406 if (errCnt<0){
407 PrintAndLog("Error during decode:%d", errCnt);
408 return 0;
409 }
410 if (errCnt>maxErr){
411 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
412 return 0;
413 }
414
415 if (errCnt>0){
416 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
417 }
418
419 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
420 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
421
422 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
423 setClockGrid(g_DemodClock, g_DemodStartIdx + g_DemodClock*offset/2);
424 return 1;
425 }
426
427 //by marshmellow
428 // - ASK Demod then Biphase decode GraphBuffer samples
429 int ASKbiphaseDemod(const char *Cmd, bool verbose)
430 {
431 //ask raw demod GraphBuffer first
432 int offset=0, clk=0, invert=0, maxErr=100;
433 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
434
435 uint8_t BitStream[MAX_GRAPH_TRACE_LEN];
436 size_t size = getFromGraphBuf(BitStream);
437 int startIdx = 0;
438 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
439 int errCnt = askdemod_ext(BitStream, &size, &clk, &invert, maxErr, 0, 0, &startIdx);
440 if ( errCnt < 0 || errCnt > maxErr ) {
441 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
442 return 0;
443 }
444
445 //attempt to Biphase decode BitStream
446 errCnt = BiphaseRawDecode(BitStream, &size, &offset, invert);
447 if (errCnt < 0){
448 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
449 return 0;
450 }
451 if (errCnt > maxErr) {
452 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
453 return 0;
454 }
455 //success set DemodBuffer and return
456 setDemodBuf(BitStream, size, 0);
457 setClockGrid(clk, startIdx + clk*offset/2);
458 if (g_debugMode || verbose){
459 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
460 printDemodBuff();
461 }
462 return 1;
463 }
464 //by marshmellow - see ASKbiphaseDemod
465 int Cmdaskbiphdemod(const char *Cmd)
466 {
467 char cmdp = param_getchar(Cmd, 0);
468 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
469 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
470 PrintAndLog(" [offset], offset to begin biphase, default=0");
471 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
472 PrintAndLog(" <invert>, 1 to invert output");
473 PrintAndLog(" [set maximum allowed errors], default = 100");
474 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
475 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
476 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
477 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
478 PrintAndLog(" NOTE: any other arg must have previous args set to work");
479 PrintAndLog("");
480 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
481 PrintAndLog("");
482 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
483 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
484 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
485 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
486 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
487 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");
488 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");
489 return 0;
490 }
491 return ASKbiphaseDemod(Cmd, true);
492 }
493
494 //by marshmellow - see ASKDemod
495 int Cmdaskrawdemod(const char *Cmd)
496 {
497 char cmdp = param_getchar(Cmd, 0);
498 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
499 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
500 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
501 PrintAndLog(" <invert>, 1 to invert output");
502 PrintAndLog(" [set maximum allowed errors], default = 100");
503 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
504 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
505 PrintAndLog("");
506 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
507 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
508 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
509 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
510 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
511 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");
512 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");
513 return 0;
514 }
515 return ASKDemod(Cmd, true, false, 0);
516 }
517
518 int AutoCorrelate(const int *in, int *out, size_t len, int window, bool SaveGrph, bool verbose)
519 {
520 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
521 size_t Correlation = 0;
522 int maxSum = 0;
523 int lastMax = 0;
524 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
525 for (int i = 0; i < len - window; ++i) {
526 int sum = 0;
527 for (int j = 0; j < window; ++j) {
528 sum += (in[j]*in[i + j]) / 256;
529 }
530 CorrelBuffer[i] = sum;
531 if (sum >= maxSum-100 && sum <= maxSum+100) {
532 //another max
533 Correlation = i-lastMax;
534 lastMax = i;
535 if (sum > maxSum) maxSum = sum;
536 } else if (sum > maxSum) {
537 maxSum=sum;
538 lastMax = i;
539 }
540 }
541 if (Correlation==0) {
542 //try again with wider margin
543 for (int i = 0; i < len - window; i++) {
544 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)) {
545 //another max
546 Correlation = i-lastMax;
547 lastMax = i;
548 }
549 }
550 }
551 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
552
553 if (SaveGrph) {
554 //GraphTraceLen = GraphTraceLen - window;
555 memcpy(out, CorrelBuffer, len * sizeof(int));
556 RepaintGraphWindow();
557 }
558 return Correlation;
559 }
560
561 int usage_data_autocorr(void)
562 {
563 //print help
564 PrintAndLog("Usage: data autocorr [window] [g]");
565 PrintAndLog("Options: ");
566 PrintAndLog(" h This help");
567 PrintAndLog(" [window] window length for correlation - default = 4000");
568 PrintAndLog(" g save back to GraphBuffer (overwrite)");
569 return 0;
570 }
571
572 int CmdAutoCorr(const char *Cmd)
573 {
574 char cmdp = param_getchar(Cmd, 0);
575 if (cmdp == 'h' || cmdp == 'H')
576 return usage_data_autocorr();
577 int window = 4000; //set default
578 char grph=0;
579 bool updateGrph = false;
580 sscanf(Cmd, "%i %c", &window, &grph);
581
582 if (window >= GraphTraceLen) {
583 PrintAndLog("window must be smaller than trace (%d samples)",
584 GraphTraceLen);
585 return 0;
586 }
587 if (grph == 'g') updateGrph=true;
588 return AutoCorrelate(GraphBuffer, GraphBuffer, GraphTraceLen, window, updateGrph, true);
589 }
590
591 int CmdBitsamples(const char *Cmd)
592 {
593 int cnt = 0;
594 uint8_t got[12288];
595
596 GetFromBigBuf(got, sizeof(got), 0 , NULL, -1, false);
597
598 for (int j = 0; j < sizeof(got); j++) {
599 for (int k = 0; k < 8; k++) {
600 if(got[j] & (1 << (7 - k))) {
601 GraphBuffer[cnt++] = 1;
602 } else {
603 GraphBuffer[cnt++] = 0;
604 }
605 }
606 }
607 GraphTraceLen = cnt;
608 RepaintGraphWindow();
609 return 0;
610 }
611
612 int CmdBuffClear(const char *Cmd)
613 {
614 UsbCommand c = {CMD_BUFF_CLEAR};
615 SendCommand(&c);
616 ClearGraph(true);
617 return 0;
618 }
619
620 int CmdDec(const char *Cmd)
621 {
622 for (int i = 0; i < (GraphTraceLen / 2); ++i)
623 GraphBuffer[i] = GraphBuffer[i * 2];
624 GraphTraceLen /= 2;
625 PrintAndLog("decimated by 2");
626 RepaintGraphWindow();
627 return 0;
628 }
629 /**
630 * Undecimate - I'd call it 'interpolate', but we'll save that
631 * name until someone does an actual interpolation command, not just
632 * blindly repeating samples
633 * @param Cmd
634 * @return
635 */
636 int CmdUndec(const char *Cmd)
637 {
638 if(param_getchar(Cmd, 0) == 'h')
639 {
640 PrintAndLog("Usage: data undec [factor]");
641 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
642 PrintAndLog("Options: ");
643 PrintAndLog(" h This help");
644 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
645 PrintAndLog("Example: 'data undec 3'");
646 return 0;
647 }
648
649 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
650 //We have memory, don't we?
651 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
652 uint32_t g_index = 0, s_index = 0;
653 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
654 {
655 int count = 0;
656 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
657 swap[s_index+count] = GraphBuffer[g_index];
658
659 s_index += count;
660 g_index++;
661 }
662
663 memcpy(GraphBuffer, swap, s_index * sizeof(int));
664 GraphTraceLen = s_index;
665 RepaintGraphWindow();
666 return 0;
667 }
668
669 //by marshmellow
670 //shift graph zero up or down based on input + or -
671 int CmdGraphShiftZero(const char *Cmd)
672 {
673
674 int shift=0;
675 //set options from parameters entered with the command
676 sscanf(Cmd, "%i", &shift);
677 int shiftedVal=0;
678 for(int i = 0; i<GraphTraceLen; i++){
679 shiftedVal=GraphBuffer[i]+shift;
680 if (shiftedVal>127)
681 shiftedVal=127;
682 else if (shiftedVal<-127)
683 shiftedVal=-127;
684 GraphBuffer[i]= shiftedVal;
685 }
686 CmdNorm("");
687 return 0;
688 }
689
690 int AskEdgeDetect(const int *in, int *out, int len, int threshold) {
691 int Last = 0;
692 for(int i = 1; i<len; i++) {
693 if (in[i]-in[i-1] >= threshold) //large jump up
694 Last = 127;
695 else if(in[i]-in[i-1] <= -1 * threshold) //large jump down
696 Last = -127;
697 out[i-1] = Last;
698 }
699 return 0;
700 }
701
702 //by marshmellow
703 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
704 //similar to dirtheshold, threshold commands
705 //takes a threshold length which is the measured length between two samples then determines an edge
706 int CmdAskEdgeDetect(const char *Cmd)
707 {
708 int thresLen = 25;
709 int ans = 0;
710 sscanf(Cmd, "%i", &thresLen);
711
712 ans = AskEdgeDetect(GraphBuffer, GraphBuffer, GraphTraceLen, thresLen);
713 RepaintGraphWindow();
714 return ans;
715 }
716
717 /* Print our clock rate */
718 // uses data from graphbuffer
719 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
720 int CmdDetectClockRate(const char *Cmd)
721 {
722 char cmdp = param_getchar(Cmd, 0);
723 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
724 PrintAndLog("Usage: data detectclock [modulation] <clock>");
725 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
726 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
727 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
728 PrintAndLog("");
729 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
730 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
731 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
732 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
733 }
734 int ans=0;
735 if (cmdp == 'a'){
736 ans = GetAskClock(Cmd+1, true, false);
737 } else if (cmdp == 'f'){
738 ans = GetFskClock("", true, false);
739 } else if (cmdp == 'n'){
740 ans = GetNrzClock("", true, false);
741 } else if (cmdp == 'p'){
742 ans = GetPskClock("", true, false);
743 } else {
744 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
745 }
746 return ans;
747 }
748
749 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
750 {
751 static char fType[8];
752 memset(fType, 0x00, 8);
753 char *fskType = fType;
754 if (fchigh==10 && fclow==8){
755 if (invert) //fsk2a
756 memcpy(fskType, "FSK2a", 5);
757 else //fsk2
758 memcpy(fskType, "FSK2", 4);
759 } else if (fchigh == 8 && fclow == 5) {
760 if (invert)
761 memcpy(fskType, "FSK1", 4);
762 else
763 memcpy(fskType, "FSK1a", 5);
764 } else {
765 memcpy(fskType, "FSK??", 5);
766 }
767 return fskType;
768 }
769
770 //by marshmellow
771 //fsk raw demod and print binary
772 //takes 4 arguments - Clock, invert, fchigh, fclow
773 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
774 int FSKrawDemod(const char *Cmd, bool verbose)
775 {
776 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
777 uint8_t rfLen, invert, fchigh, fclow;
778 //set defaults
779 //set options from parameters entered with the command
780 rfLen = param_get8(Cmd, 0);
781 invert = param_get8(Cmd, 1);
782 fchigh = param_get8(Cmd, 2);
783 fclow = param_get8(Cmd, 3);
784
785 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
786 if (rfLen==1) {
787 invert = 1; //if invert option only is used
788 rfLen = 0;
789 }
790 }
791 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
792 size_t BitLen = getFromGraphBuf(BitStream);
793 if (BitLen==0) return 0;
794 //get field clock lengths
795 uint16_t fcs=0;
796 if (!fchigh || !fclow) {
797 fcs = countFC(BitStream, BitLen, 1);
798 if (!fcs) {
799 fchigh = 10;
800 fclow = 8;
801 } else {
802 fchigh = (fcs >> 8) & 0x00FF;
803 fclow = fcs & 0x00FF;
804 }
805 }
806 //get bit clock length
807 if (!rfLen) {
808 int firstClockEdge = 0; //todo - align grid on graph with this...
809 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow, &firstClockEdge);
810 if (!rfLen) rfLen = 50;
811 }
812 int startIdx = 0;
813 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow, &startIdx);
814 if (size > 0) {
815 setDemodBuf(BitStream,size,0);
816 setClockGrid(rfLen, startIdx);
817
818 // Now output the bitstream to the scrollback by line of 16 bits
819 if (verbose || g_debugMode) {
820 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
821 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
822 printDemodBuff();
823 }
824
825 return 1;
826 } else {
827 if (g_debugMode) PrintAndLog("no FSK data found");
828 }
829 return 0;
830 }
831
832 //by marshmellow
833 //fsk raw demod and print binary
834 //takes 4 arguments - Clock, invert, fchigh, fclow
835 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
836 int CmdFSKrawdemod(const char *Cmd)
837 {
838 char cmdp = param_getchar(Cmd, 0);
839 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
840 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
841 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
842 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
843 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
844 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
845 PrintAndLog("");
846 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
847 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
848 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
849 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
850 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
851 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
852 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
853 return 0;
854 }
855 return FSKrawDemod(Cmd, true);
856 }
857
858 //by marshmellow
859 //attempt to psk1 demod graph buffer
860 int PSKDemod(const char *Cmd, bool verbose)
861 {
862 int invert=0;
863 int clk=0;
864 int maxErr=100;
865 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
866 if (clk==1){
867 invert=1;
868 clk=0;
869 }
870 if (invert != 0 && invert != 1) {
871 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
872 return 0;
873 }
874 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
875 size_t BitLen = getFromGraphBuf(BitStream);
876 if (BitLen==0) return 0;
877 int errCnt=0;
878 int startIdx = 0;
879 errCnt = pskRawDemod_ext(BitStream, &BitLen, &clk, &invert, &startIdx);
880 if (errCnt > maxErr){
881 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
882 return 0;
883 }
884 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
885 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
886 return 0;
887 }
888 if (verbose || g_debugMode){
889 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
890 if (errCnt>0){
891 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
892 }
893 }
894 //prime demod buffer for output
895 setDemodBuf(BitStream,BitLen,0);
896 setClockGrid(clk, startIdx);
897
898 return 1;
899 }
900
901 // by marshmellow
902 // takes 3 arguments - clock, invert, maxErr as integers
903 // attempts to demodulate nrz only
904 // prints binary found and saves in demodbuffer for further commands
905 int NRZrawDemod(const char *Cmd, bool verbose)
906 {
907 int invert=0;
908 int clk=0;
909 int maxErr=100;
910 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
911 if (clk==1){
912 invert=1;
913 clk=0;
914 }
915 if (invert != 0 && invert != 1) {
916 PrintAndLog("Invalid argument: %s", Cmd);
917 return 0;
918 }
919 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
920 size_t BitLen = getFromGraphBuf(BitStream);
921 if (BitLen==0) return 0;
922 int errCnt=0;
923 int clkStartIdx = 0;
924 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
925 if (errCnt > maxErr){
926 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
927 return 0;
928 }
929 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
930 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
931 return 0;
932 }
933 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
934 //prime demod buffer for output
935 setDemodBuf(BitStream,BitLen,0);
936 setClockGrid(clk, clkStartIdx);
937
938
939 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
940 if (verbose || g_debugMode) {
941 PrintAndLog("NRZ demoded bitstream:");
942 // Now output the bitstream to the scrollback by line of 16 bits
943 printDemodBuff();
944 }
945 return 1;
946 }
947
948 int CmdNRZrawDemod(const char *Cmd)
949 {
950 char cmdp = param_getchar(Cmd, 0);
951 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
952 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
953 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
954 PrintAndLog(" <invert>, 1 for invert output");
955 PrintAndLog(" [set maximum allowed errors], default = 100.");
956 PrintAndLog("");
957 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
958 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
959 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
960 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
961 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");
962 return 0;
963 }
964 return NRZrawDemod(Cmd, true);
965 }
966
967 // by marshmellow
968 // takes 3 arguments - clock, invert, maxErr as integers
969 // attempts to demodulate psk only
970 // prints binary found and saves in demodbuffer for further commands
971 int CmdPSK1rawDemod(const char *Cmd)
972 {
973 int ans;
974 char cmdp = param_getchar(Cmd, 0);
975 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
976 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
977 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
978 PrintAndLog(" <invert>, 1 for invert output");
979 PrintAndLog(" [set maximum allowed errors], default = 100.");
980 PrintAndLog("");
981 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
982 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
983 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
984 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
985 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");
986 return 0;
987 }
988 ans = PSKDemod(Cmd, true);
989 //output
990 if (!ans){
991 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
992 return 0;
993 }
994
995 PrintAndLog("PSK1 demoded bitstream:");
996 // Now output the bitstream to the scrollback by line of 16 bits
997 printDemodBuff();
998 return 1;
999 }
1000
1001 // by marshmellow
1002 // takes same args as cmdpsk1rawdemod
1003 int CmdPSK2rawDemod(const char *Cmd)
1004 {
1005 int ans=0;
1006 char cmdp = param_getchar(Cmd, 0);
1007 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
1008 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1009 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1010 PrintAndLog(" <invert>, 1 for invert output");
1011 PrintAndLog(" [set maximum allowed errors], default = 100.");
1012 PrintAndLog("");
1013 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1014 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1015 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1016 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1017 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");
1018 return 0;
1019 }
1020 ans=PSKDemod(Cmd, true);
1021 if (!ans){
1022 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1023 return 0;
1024 }
1025 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1026 PrintAndLog("PSK2 demoded bitstream:");
1027 // Now output the bitstream to the scrollback by line of 16 bits
1028 printDemodBuff();
1029 return 1;
1030 }
1031
1032 // by marshmellow - combines all raw demod functions into one menu command
1033 int CmdRawDemod(const char *Cmd)
1034 {
1035 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1036
1037 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1038 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1039 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1040 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1041 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1042 PrintAndLog(" <options> see specific modulation help for optional parameters");
1043 PrintAndLog("");
1044 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1045 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1046 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1047 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1048 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1049 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1050 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1051 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1052 return 0;
1053 }
1054 char cmdp2 = Cmd[1];
1055 int ans = 0;
1056 if (cmdp == 'f' && cmdp2 == 's'){
1057 ans = CmdFSKrawdemod(Cmd+2);
1058 } else if(cmdp == 'a' && cmdp2 == 'b'){
1059 ans = Cmdaskbiphdemod(Cmd+2);
1060 } else if(cmdp == 'a' && cmdp2 == 'm'){
1061 ans = Cmdaskmandemod(Cmd+2);
1062 } else if(cmdp == 'a' && cmdp2 == 'r'){
1063 ans = Cmdaskrawdemod(Cmd+2);
1064 } else if(cmdp == 'n' && cmdp2 == 'r'){
1065 ans = CmdNRZrawDemod(Cmd+2);
1066 } else if(cmdp == 'p' && cmdp2 == '1'){
1067 ans = CmdPSK1rawDemod(Cmd+2);
1068 } else if(cmdp == 'p' && cmdp2 == '2'){
1069 ans = CmdPSK2rawDemod(Cmd+2);
1070 } else {
1071 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1072 }
1073 return ans;
1074 }
1075
1076 void setClockGrid(int clk, int offset) {
1077 g_DemodStartIdx = offset;
1078 g_DemodClock = clk;
1079 if (g_debugMode) PrintAndLog("demodoffset %d, clk %d",offset,clk);
1080
1081 if (offset > clk) offset %= clk;
1082 if (offset < 0) offset += clk;
1083
1084 if (offset > GraphTraceLen || offset < 0) return;
1085 if (clk < 8 || clk > GraphTraceLen) {
1086 GridLocked = false;
1087 GridOffset = 0;
1088 PlotGridX = 0;
1089 PlotGridXdefault = 0;
1090 RepaintGraphWindow();
1091 } else {
1092 GridLocked = true;
1093 GridOffset = offset;
1094 PlotGridX = clk;
1095 PlotGridXdefault = clk;
1096 RepaintGraphWindow();
1097 }
1098 }
1099
1100 int CmdGrid(const char *Cmd)
1101 {
1102 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1103 PlotGridXdefault= PlotGridX;
1104 PlotGridYdefault= PlotGridY;
1105 RepaintGraphWindow();
1106 return 0;
1107 }
1108
1109 int CmdSetGraphMarkers(const char *Cmd) {
1110 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1111 RepaintGraphWindow();
1112 return 0;
1113 }
1114
1115 int CmdHexsamples(const char *Cmd)
1116 {
1117 int i, j;
1118 int requested = 0;
1119 int offset = 0;
1120 char string_buf[25];
1121 char* string_ptr = string_buf;
1122 uint8_t got[BIGBUF_SIZE];
1123
1124 sscanf(Cmd, "%i %i", &requested, &offset);
1125
1126 /* if no args send something */
1127 if (requested == 0) {
1128 requested = 8;
1129 }
1130 if (offset + requested > sizeof(got)) {
1131 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1132 return 0;
1133 }
1134
1135 GetFromBigBuf(got, requested, offset, NULL, -1, false);
1136
1137 i = 0;
1138 for (j = 0; j < requested; j++) {
1139 i++;
1140 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1141 if (i == 8) {
1142 *(string_ptr - 1) = '\0'; // remove the trailing space
1143 PrintAndLog("%s", string_buf);
1144 string_buf[0] = '\0';
1145 string_ptr = string_buf;
1146 i = 0;
1147 }
1148 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1149 *(string_ptr - 1) = '\0';
1150 PrintAndLog("%s", string_buf);
1151 string_buf[0] = '\0';
1152 }
1153 }
1154 return 0;
1155 }
1156
1157 int CmdHide(const char *Cmd)
1158 {
1159 HideGraphWindow();
1160 return 0;
1161 }
1162
1163 //zero mean GraphBuffer
1164 int CmdHpf(const char *Cmd)
1165 {
1166 int i;
1167 int accum = 0;
1168
1169 for (i = 10; i < GraphTraceLen; ++i)
1170 accum += GraphBuffer[i];
1171 accum /= (GraphTraceLen - 10);
1172 for (i = 0; i < GraphTraceLen; ++i)
1173 GraphBuffer[i] -= accum;
1174
1175 RepaintGraphWindow();
1176 return 0;
1177 }
1178
1179 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1180 {
1181 int i;
1182 uint8_t val = 0;
1183 for(i =0 ; i < bits_per_sample; i++)
1184 {
1185 val |= (headBit(b) << (7-i));
1186 }
1187 return val;
1188 }
1189
1190 int getSamples(int n, bool silent)
1191 {
1192 //If we get all but the last byte in bigbuf,
1193 // we don't have to worry about remaining trash
1194 // in the last byte in case the bits-per-sample
1195 // does not line up on byte boundaries
1196
1197 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1198
1199 if (n == 0 || n > sizeof(got))
1200 n = sizeof(got);
1201
1202 if (!silent) PrintAndLog("Reading %d bytes from device memory\n", n);
1203 UsbCommand response;
1204 GetFromBigBuf(got, n, 0, &response, -1, false);
1205 if (!silent) PrintAndLog("Data fetched");
1206 uint8_t bits_per_sample = 8;
1207
1208 //Old devices without this feature would send 0 at arg[0]
1209 if(response.arg[0] > 0)
1210 {
1211 sample_config *sc = (sample_config *) response.d.asBytes;
1212 if (!silent) PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1213 , sc->decimation);
1214 bits_per_sample = sc->bits_per_sample;
1215 }
1216 if(bits_per_sample < 8)
1217 {
1218 if (!silent) PrintAndLog("Unpacking...");
1219 BitstreamIn bout = { got, bits_per_sample * n, 0};
1220 int j =0;
1221 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1222 uint8_t sample = getByte(bits_per_sample, &bout);
1223 GraphBuffer[j] = ((int) sample )- 128;
1224 }
1225 GraphTraceLen = j;
1226 PrintAndLog("Unpacked %d samples" , j );
1227 }else
1228 {
1229 for (int j = 0; j < n; j++) {
1230 GraphBuffer[j] = ((int)got[j]) - 128;
1231 }
1232 GraphTraceLen = n;
1233 }
1234
1235 setClockGrid(0,0);
1236 DemodBufferLen = 0;
1237 RepaintGraphWindow();
1238 return 0;
1239 }
1240
1241 int CmdSamples(const char *Cmd)
1242 {
1243 int n = strtol(Cmd, NULL, 0);
1244 return getSamples(n, false);
1245 }
1246
1247 int CmdTuneSamples(const char *Cmd)
1248 {
1249 int timeout = 0, arg = FLAG_TUNE_ALL;
1250
1251 if(*Cmd == 'l') {
1252 arg = FLAG_TUNE_LF;
1253 } else if (*Cmd == 'h') {
1254 arg = FLAG_TUNE_HF;
1255 } else if (*Cmd != '\0') {
1256 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1257 return 0;
1258 }
1259
1260 printf("\nMeasuring antenna characteristics, please wait...");
1261
1262 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1263 SendCommand(&c);
1264
1265 UsbCommand resp;
1266 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1267 timeout++;
1268 printf(".");
1269 if (timeout > 7) {
1270 PrintAndLog("\nNo response from Proxmark. Aborting...");
1271 return 1;
1272 }
1273 }
1274
1275 int peakv, peakf;
1276 int vLf125, vLf134, vHf;
1277 vLf125 = resp.arg[0] & 0xffff;
1278 vLf134 = resp.arg[0] >> 16;
1279 vHf = resp.arg[1] & 0xffff;;
1280 peakf = resp.arg[2] & 0xffff;
1281 peakv = resp.arg[2] >> 16;
1282 PrintAndLog("");
1283 if (arg & FLAG_TUNE_LF)
1284 {
1285 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/500.0);
1286 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/500.0);
1287 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/500.0, 12000.0/(peakf+1));
1288 }
1289 if (arg & FLAG_TUNE_HF)
1290 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1291
1292 #define LF_UNUSABLE_V 3000
1293 #define LF_MARGINAL_V 15000
1294 #define HF_UNUSABLE_V 3200
1295 #define HF_MARGINAL_V 8000
1296
1297 if (arg & FLAG_TUNE_LF)
1298 {
1299 if (peakv<<1 < LF_UNUSABLE_V)
1300 PrintAndLog("# Your LF antenna is unusable.");
1301 else if (peakv<<1 < LF_MARGINAL_V)
1302 PrintAndLog("# Your LF antenna is marginal.");
1303 }
1304 if (arg & FLAG_TUNE_HF)
1305 {
1306 if (vHf < HF_UNUSABLE_V)
1307 PrintAndLog("# Your HF antenna is unusable.");
1308 else if (vHf < HF_MARGINAL_V)
1309 PrintAndLog("# Your HF antenna is marginal.");
1310 }
1311
1312 if (peakv<<1 >= LF_UNUSABLE_V) {
1313 for (int i = 0; i < 256; i++) {
1314 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1315 }
1316 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1317 PrintAndLog("\n");
1318 GraphTraceLen = 256;
1319 ShowGraphWindow();
1320 RepaintGraphWindow();
1321 }
1322
1323 return 0;
1324 }
1325
1326
1327 int CmdLoad(const char *Cmd)
1328 {
1329 char filename[FILE_PATH_SIZE] = {0x00};
1330 int len = 0;
1331
1332 len = strlen(Cmd);
1333 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1334 memcpy(filename, Cmd, len);
1335
1336 FILE *f = fopen(filename, "r");
1337 if (!f) {
1338 PrintAndLog("couldn't open '%s'", filename);
1339 return 0;
1340 }
1341
1342 GraphTraceLen = 0;
1343 char line[80];
1344 while (fgets(line, sizeof (line), f)) {
1345 GraphBuffer[GraphTraceLen] = atoi(line);
1346 GraphTraceLen++;
1347 }
1348 fclose(f);
1349 PrintAndLog("loaded %d samples", GraphTraceLen);
1350 setClockGrid(0,0);
1351 DemodBufferLen = 0;
1352 RepaintGraphWindow();
1353 return 0;
1354 }
1355
1356 int CmdLtrim(const char *Cmd)
1357 {
1358 int ds = atoi(Cmd);
1359 if (GraphTraceLen<=0) return 0;
1360 for (int i = ds; i < GraphTraceLen; ++i)
1361 GraphBuffer[i-ds] = GraphBuffer[i];
1362 GraphTraceLen -= ds;
1363
1364 RepaintGraphWindow();
1365 return 0;
1366 }
1367
1368 // trim graph to input argument length
1369 int CmdRtrim(const char *Cmd)
1370 {
1371 int ds = atoi(Cmd);
1372
1373 GraphTraceLen = ds;
1374
1375 RepaintGraphWindow();
1376 return 0;
1377 }
1378
1379 // trim graph (middle) piece
1380 int CmdMtrim(const char *Cmd) {
1381 int start = 0, stop = 0;
1382 sscanf(Cmd, "%i %i", &start, &stop);
1383
1384 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1385 start++; //leave start position sample
1386
1387 GraphTraceLen = stop - start;
1388 for (int i = 0; i < GraphTraceLen; i++) {
1389 GraphBuffer[i] = GraphBuffer[start+i];
1390 }
1391 return 0;
1392 }
1393
1394
1395 int CmdNorm(const char *Cmd)
1396 {
1397 int i;
1398 int max = INT_MIN, min = INT_MAX;
1399
1400 for (i = 10; i < GraphTraceLen; ++i) {
1401 if (GraphBuffer[i] > max)
1402 max = GraphBuffer[i];
1403 if (GraphBuffer[i] < min)
1404 min = GraphBuffer[i];
1405 }
1406
1407 if (max != min) {
1408 for (i = 0; i < GraphTraceLen; ++i) {
1409 GraphBuffer[i] = ((long)(GraphBuffer[i] - ((max + min) / 2)) * 256) / (max - min);
1410 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1411 }
1412 }
1413 RepaintGraphWindow();
1414 return 0;
1415 }
1416
1417 int CmdPlot(const char *Cmd)
1418 {
1419 ShowGraphWindow();
1420 return 0;
1421 }
1422
1423 int CmdSave(const char *Cmd)
1424 {
1425 char filename[FILE_PATH_SIZE] = {0x00};
1426 int len = 0;
1427
1428 len = strlen(Cmd);
1429 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1430 memcpy(filename, Cmd, len);
1431
1432
1433 FILE *f = fopen(filename, "w");
1434 if(!f) {
1435 PrintAndLog("couldn't open '%s'", filename);
1436 return 0;
1437 }
1438 int i;
1439 for (i = 0; i < GraphTraceLen; i++) {
1440 fprintf(f, "%d\n", GraphBuffer[i]);
1441 }
1442 fclose(f);
1443 PrintAndLog("saved to '%s'", Cmd);
1444 return 0;
1445 }
1446
1447 int CmdScale(const char *Cmd)
1448 {
1449 CursorScaleFactor = atoi(Cmd);
1450 if (CursorScaleFactor == 0) {
1451 PrintAndLog("bad, can't have zero scale");
1452 CursorScaleFactor = 1;
1453 }
1454 RepaintGraphWindow();
1455 return 0;
1456 }
1457
1458 int directionalThreshold(const int* in, int *out, size_t len, int8_t up, int8_t down)
1459 {
1460 int lastValue = in[0];
1461 out[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1462
1463 for (int i = 1; i < len; ++i) {
1464 // Apply first threshold to samples heading up
1465 if (in[i] >= up && in[i] > lastValue)
1466 {
1467 lastValue = out[i]; // Buffer last value as we overwrite it.
1468 out[i] = 1;
1469 }
1470 // Apply second threshold to samples heading down
1471 else if (in[i] <= down && in[i] < lastValue)
1472 {
1473 lastValue = out[i]; // Buffer last value as we overwrite it.
1474 out[i] = -1;
1475 }
1476 else
1477 {
1478 lastValue = out[i]; // Buffer last value as we overwrite it.
1479 out[i] = out[i-1];
1480 }
1481 }
1482 out[0] = out[1]; // Align with first edited sample.
1483 return 0;
1484 }
1485
1486 int CmdDirectionalThreshold(const char *Cmd)
1487 {
1488 int8_t upThres = param_get8(Cmd, 0);
1489 int8_t downThres = param_get8(Cmd, 1);
1490
1491 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1492
1493 directionalThreshold(GraphBuffer, GraphBuffer,GraphTraceLen, upThres, downThres);
1494 RepaintGraphWindow();
1495 return 0;
1496 }
1497
1498 int CmdZerocrossings(const char *Cmd)
1499 {
1500 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1501 CmdHpf("");
1502
1503 int sign = 1;
1504 int zc = 0;
1505 int lastZc = 0;
1506
1507 for (int i = 0; i < GraphTraceLen; ++i) {
1508 if (GraphBuffer[i] * sign >= 0) {
1509 // No change in sign, reproduce the previous sample count.
1510 zc++;
1511 GraphBuffer[i] = lastZc;
1512 } else {
1513 // Change in sign, reset the sample count.
1514 sign = -sign;
1515 GraphBuffer[i] = lastZc;
1516 if (sign > 0) {
1517 lastZc = zc;
1518 zc = 0;
1519 }
1520 }
1521 }
1522
1523 RepaintGraphWindow();
1524 return 0;
1525 }
1526
1527 int usage_data_bin2hex(){
1528 PrintAndLog("Usage: data bin2hex <binary_digits>");
1529 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1530 return 0;
1531 }
1532
1533 /**
1534 * @brief Utility for conversion via cmdline.
1535 * @param Cmd
1536 * @return
1537 */
1538 int Cmdbin2hex(const char *Cmd)
1539 {
1540 int bg =0, en =0;
1541 if(param_getptr(Cmd, &bg, &en, 0))
1542 {
1543 return usage_data_bin2hex();
1544 }
1545 //Number of digits supplied as argument
1546 size_t length = en - bg +1;
1547 size_t bytelen = (length+7) / 8;
1548 uint8_t* arr = (uint8_t *) malloc(bytelen);
1549 memset(arr, 0, bytelen);
1550 BitstreamOut bout = { arr, 0, 0 };
1551
1552 for(; bg <= en ;bg++)
1553 {
1554 char c = Cmd[bg];
1555 if( c == '1') pushBit(&bout, 1);
1556 else if( c == '0') pushBit(&bout, 0);
1557 else PrintAndLog("Ignoring '%c'", c);
1558 }
1559
1560 if(bout.numbits % 8 != 0)
1561 {
1562 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1563 }
1564
1565 //Uses printf instead of PrintAndLog since the latter
1566 // adds linebreaks to each printout - this way was more convenient since we don't have to
1567 // allocate a string and write to that first...
1568 for(size_t x = 0; x < bytelen ; x++)
1569 {
1570 printf("%02X", arr[x]);
1571 }
1572 printf("\n");
1573 free(arr);
1574 return 0;
1575 }
1576
1577 int usage_data_hex2bin() {
1578 PrintAndLog("Usage: data hex2bin <hex_digits>");
1579 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1580 return 0;
1581
1582 }
1583
1584 int Cmdhex2bin(const char *Cmd)
1585 {
1586 int bg =0, en =0;
1587 if(param_getptr(Cmd, &bg, &en, 0))
1588 {
1589 return usage_data_hex2bin();
1590 }
1591
1592
1593 while(bg <= en )
1594 {
1595 char x = Cmd[bg++];
1596 // capitalize
1597 if (x >= 'a' && x <= 'f')
1598 x -= 32;
1599 // convert to numeric value
1600 if (x >= '0' && x <= '9')
1601 x -= '0';
1602 else if (x >= 'A' && x <= 'F')
1603 x -= 'A' - 10;
1604 else
1605 continue;
1606
1607 //Uses printf instead of PrintAndLog since the latter
1608 // adds linebreaks to each printout - this way was more convenient since we don't have to
1609 // allocate a string and write to that first...
1610
1611 for(int i= 0 ; i < 4 ; ++i)
1612 printf("%d",(x >> (3 - i)) & 1);
1613 }
1614 printf("\n");
1615
1616 return 0;
1617 }
1618
1619 /* // example of FSK2 RF/50 Tones
1620 static const int LowTone[] = {
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 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1625 1, 1, 1, 1, 1, -1, -1, -1, -1, -1
1626 };
1627 static const int HighTone[] = {
1628 1, 1, 1, 1, 1, -1, -1, -1, -1, // note one extra 1 to padd due to 50/8 remainder (1/2 the remainder)
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,
1632 1, 1, 1, 1, -1, -1, -1, -1,
1633 1, 1, 1, 1, -1, -1, -1, -1, -1, // note one extra -1 to padd due to 50/8 remainder
1634 };
1635 */
1636 void GetHiLoTone(int *LowTone, int *HighTone, int clk, int LowToneFC, int HighToneFC) {
1637 int i,j=0;
1638 int Left_Modifier = ((clk % LowToneFC) % 2) + ((clk % LowToneFC)/2);
1639 int Right_Modifier = (clk % LowToneFC) / 2;
1640 //int HighToneMod = clk mod HighToneFC;
1641 int LeftHalfFCCnt = (LowToneFC % 2) + (LowToneFC/2); //truncate
1642 int FCs_per_clk = clk/LowToneFC;
1643
1644 // need to correctly split up the clock to field clocks.
1645 // First attempt uses modifiers on each end to make up for when FCs don't evenly divide into Clk
1646
1647 // start with LowTone
1648 // set extra 1 modifiers to make up for when FC doesn't divide evenly into Clk
1649 for (i = 0; i < Left_Modifier; i++) {
1650 LowTone[i] = 1;
1651 }
1652
1653 // loop # of field clocks inside the main clock
1654 for (i = 0; i < (FCs_per_clk); i++) {
1655 // loop # of samples per field clock
1656 for (j = 0; j < LowToneFC; j++) {
1657 LowTone[(i*LowToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
1658 }
1659 }
1660
1661 int k;
1662 // add last -1 modifiers
1663 for (k = 0; k < Right_Modifier; k++) {
1664 LowTone[((i-1)*LowToneFC)+Left_Modifier+j+k] = -1;
1665 }
1666
1667 // now do hightone
1668 Left_Modifier = ((clk % HighToneFC) % 2) + ((clk % HighToneFC)/2);
1669 Right_Modifier = (clk % HighToneFC) / 2;
1670 LeftHalfFCCnt = (HighToneFC % 2) + (HighToneFC/2); //truncate
1671 FCs_per_clk = clk/HighToneFC;
1672
1673 for (i = 0; i < Left_Modifier; i++) {
1674 HighTone[i] = 1;
1675 }
1676
1677 // loop # of field clocks inside the main clock
1678 for (i = 0; i < (FCs_per_clk); i++) {
1679 // loop # of samples per field clock
1680 for (j = 0; j < HighToneFC; j++) {
1681 HighTone[(i*HighToneFC)+Left_Modifier+j] = ( j < LeftHalfFCCnt ) ? 1 : -1;
1682 }
1683 }
1684
1685 // add last -1 modifiers
1686 for (k = 0; k < Right_Modifier; k++) {
1687 PrintAndLog("(i-1)*HighToneFC+lm+j+k %i",((i-1)*HighToneFC)+Left_Modifier+j+k);
1688 HighTone[((i-1)*HighToneFC)+Left_Modifier+j+k] = -1;
1689 }
1690 if (g_debugMode == 2) {
1691 for ( i = 0; i < clk; i++) {
1692 PrintAndLog("Low: %i, High: %i",LowTone[i],HighTone[i]);
1693 }
1694 }
1695 }
1696
1697 //old CmdFSKdemod adapted by marshmellow
1698 //converts FSK to clear NRZ style wave. (or demodulates)
1699 int FSKToNRZ(int *data, int *dataLen, int clk, int LowToneFC, int HighToneFC) {
1700 uint8_t ans=0;
1701 if (clk == 0 || LowToneFC == 0 || HighToneFC == 0) {
1702 int firstClockEdge=0;
1703 ans = fskClocks((uint8_t *) &LowToneFC, (uint8_t *) &HighToneFC, (uint8_t *) &clk, false, &firstClockEdge);
1704 if (g_debugMode > 1) {
1705 PrintAndLog ("DEBUG FSKtoNRZ: detected clocks: fc_low %i, fc_high %i, clk %i, firstClockEdge %i, ans %u", LowToneFC, HighToneFC, clk, firstClockEdge, ans);
1706 }
1707 }
1708 // 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...)
1709 if (ans == 0 || clk == 0 || LowToneFC == 0 || HighToneFC == 0 || LowToneFC > 10 || HighToneFC < 4) {
1710 if (g_debugMode > 1) {
1711 PrintAndLog ("DEBUG FSKtoNRZ: no fsk clocks found");
1712 }
1713 return 0;
1714 }
1715 int LowTone[clk];
1716 int HighTone[clk];
1717 GetHiLoTone(LowTone, HighTone, clk, LowToneFC, HighToneFC);
1718
1719 int i, j;
1720
1721 // loop through ([all samples] - clk)
1722 for (i = 0; i < *dataLen - clk; ++i) {
1723 int lowSum = 0, highSum = 0;
1724
1725 // sum all samples together starting from this sample for [clk] samples for each tone (multiply tone value with sample data)
1726 for (j = 0; j < clk; ++j) {
1727 lowSum += LowTone[j] * data[i+j];
1728 highSum += HighTone[j] * data[i + j];
1729 }
1730 // get abs( [average sample value per clk] * 100 ) (or a rolling average of sorts)
1731 lowSum = abs(100 * lowSum / clk);
1732 highSum = abs(100 * highSum / clk);
1733 // save these back to buffer for later use
1734 data[i] = (highSum << 16) | lowSum;
1735 }
1736
1737 // now we have the abs( [average sample value per clk] * 100 ) for each tone
1738 // loop through again [all samples] - clk - 16
1739 // note why 16??? is 16 the largest FC? changed to LowToneFC as that should be the > fc
1740 for(i = 0; i < *dataLen - clk - LowToneFC; ++i) {
1741 int lowTot = 0, highTot = 0;
1742
1743 // sum a field clock width of abs( [average sample values per clk] * 100) for each tone
1744 for (j = 0; j < LowToneFC; ++j) { //10 for fsk2
1745 lowTot += (data[i + j] & 0xffff);
1746 }
1747 for (j = 0; j < HighToneFC; j++) { //8 for fsk2
1748 highTot += (data[i + j] >> 16);
1749 }
1750
1751 // subtract the sum of lowTone averages by the sum of highTone averages as it
1752 // and write back the new graph value
1753 data[i] = lowTot - highTot;
1754 }
1755 // update dataLen to what we put back to the data sample buffer
1756 *dataLen -= (clk + LowToneFC);
1757 return 0;
1758 }
1759
1760 int usage_data_fsktonrz() {
1761 PrintAndLog("Usage: data fsktonrz c <clock> l <fc_low> f <fc_high>");
1762 PrintAndLog("Options: ");
1763 PrintAndLog(" h This help");
1764 PrintAndLog(" c <clock> enter the a clock (omit to autodetect)");
1765 PrintAndLog(" l <fc_low> enter a field clock (omit to autodetect)");
1766 PrintAndLog(" f <fc_high> enter a field clock (omit to autodetect)");
1767 return 0;
1768 }
1769
1770 int CmdFSKToNRZ(const char *Cmd) {
1771 // take clk, fc_low, fc_high
1772 // blank = auto;
1773 bool errors = false;
1774 int clk = 0;
1775 char cmdp = 0;
1776 int fc_low = 10, fc_high = 8;
1777 while(param_getchar(Cmd, cmdp) != 0x00)
1778 {
1779 switch(param_getchar(Cmd, cmdp))
1780 {
1781 case 'h':
1782 case 'H':
1783 return usage_data_fsktonrz();
1784 case 'C':
1785 case 'c':
1786 clk = param_get32ex(Cmd, cmdp+1, 0, 10);
1787 cmdp += 2;
1788 break;
1789 case 'F':
1790 case 'f':
1791 fc_high = param_get32ex(Cmd, cmdp+1, 0, 10);
1792 cmdp += 2;
1793 break;
1794 case 'L':
1795 case 'l':
1796 fc_low = param_get32ex(Cmd, cmdp+1, 0, 10);
1797 cmdp += 2;
1798 break;
1799 default:
1800 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
1801 errors = true;
1802 break;
1803 }
1804 if(errors) break;
1805 }
1806 //Validations
1807 if(errors) return usage_data_fsktonrz();
1808
1809 setClockGrid(0,0);
1810 DemodBufferLen = 0;
1811 int ans = FSKToNRZ(GraphBuffer, &GraphTraceLen, clk, fc_low, fc_high);
1812 CmdNorm("");
1813 RepaintGraphWindow();
1814 return ans;
1815 }
1816
1817
1818 static command_t CommandTable[] =
1819 {
1820 {"help", CmdHelp, 1, "This help"},
1821 {"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)"},
1822 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1823 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1824 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1825 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1826 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1827 {"dec", CmdDec, 1, "Decimate samples"},
1828 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1829 {"fsktonrz", CmdFSKToNRZ, 1, "Convert fsk2 to nrz wave for alternate fsk demodulating (for weak fsk)"},
1830 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1831 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1832 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1833 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1834 {"hide", CmdHide, 1, "Hide graph window"},
1835 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1836 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1837 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1838 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1839 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1840 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1841 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1842 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1843 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1844 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1845 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1846 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1847 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1848 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1849 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1850 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1851 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1852 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1853 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1854 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1855 {NULL, NULL, 0, NULL}
1856 };
1857
1858 int CmdData(const char *Cmd)
1859 {
1860 CmdsParse(CommandTable, Cmd);
1861 return 0;
1862 }
1863
1864 int CmdHelp(const char *Cmd)
1865 {
1866 CmdsHelp(CommandTable);
1867 return 0;
1868 }
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