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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 <stdio.h> // also included in util.h
12 #include <string.h> // also included in util.h
13 #include <inttypes.h>
14 #include <limits.h> // for CmdNorm INT_MIN && INT_MAX
15 #include "data.h" // also included in util.h
16 #include "cmddata.h"
17 #include "util.h"
18 #include "cmdmain.h"
19 #include "proxmark3.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 //size_t g_demodStartIdx=0;
32 //uint8_t 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)
44 size = MAX_DEMOD_BUF_LEN;
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 // option '1' to save DemodBuffer any other to restore
55 void save_restoreDB(uint8_t saveOpt)
56 {
57 static uint8_t SavedDB[MAX_GRAPH_TRACE_LEN];
58 static size_t SavedDBlen;
59 static bool DB_Saved = false;
60
61 if (saveOpt==1) { //save
62 memcpy(SavedDB, DemodBuffer, sizeof(DemodBuffer));
63 SavedDBlen = DemodBufferLen;
64 DB_Saved=true;
65 } else if (DB_Saved){ //restore
66 memcpy(DemodBuffer, SavedDB, sizeof(DemodBuffer));
67 DemodBufferLen = SavedDBlen;
68 }
69 return;
70 }
71
72 int CmdSetDebugMode(const char *Cmd)
73 {
74 int demod=0;
75 sscanf(Cmd, "%i", &demod);
76 g_debugMode=(uint8_t)demod;
77 return 1;
78 }
79
80 int usage_data_printdemodbuf(){
81 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
82 PrintAndLog("Options: ");
83 PrintAndLog(" h This help");
84 PrintAndLog(" x output in hex (omit for binary output)");
85 PrintAndLog(" o <offset> enter offset in # of bits");
86 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
87 return 0;
88 }
89
90 //by marshmellow
91 void printDemodBuff(void)
92 {
93 int bitLen = DemodBufferLen;
94 if (bitLen<1) {
95 PrintAndLog("no bits found in demod buffer");
96 return;
97 }
98 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
99
100 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
101 PrintAndLog("%s",bin);
102
103 return;
104 }
105
106 int CmdPrintDemodBuff(const char *Cmd)
107 {
108 char hex[512]={0x00};
109 bool hexMode = false;
110 bool errors = false;
111 uint32_t offset = 0; //could be size_t but no param_get16...
112 uint32_t length = 512;
113 char cmdp = 0;
114 while(param_getchar(Cmd, cmdp) != 0x00)
115 {
116 switch(param_getchar(Cmd, cmdp))
117 {
118 case 'h':
119 case 'H':
120 return usage_data_printdemodbuf();
121 case 'x':
122 case 'X':
123 hexMode = true;
124 cmdp++;
125 break;
126 case 'o':
127 case 'O':
128 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
129 if (!offset) errors = true;
130 cmdp += 2;
131 break;
132 case 'l':
133 case 'L':
134 length = param_get32ex(Cmd, cmdp+1, 512, 10);
135 if (!length) errors = true;
136 cmdp += 2;
137 break;
138 default:
139 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
140 errors = true;
141 break;
142 }
143 if(errors) break;
144 }
145 //Validations
146 if(errors) return usage_data_printdemodbuf();
147 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
148 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
149
150 if (hexMode){
151 char *buf = (char *) (DemodBuffer + offset);
152 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
153 numBits = binarraytohex(hex, buf, numBits);
154 if (numBits==0) return 0;
155 PrintAndLog("DemodBuffer: %s",hex);
156 } else {
157 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
158 }
159 return 1;
160 }
161
162 //by marshmellow
163 //this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
164 int CmdGetBitStream(const char *Cmd)
165 {
166 int i;
167 CmdHpf(Cmd);
168 for (i = 0; i < GraphTraceLen; i++) {
169 if (GraphBuffer[i] >= 1) {
170 GraphBuffer[i] = 1;
171 } else {
172 GraphBuffer[i] = 0;
173 }
174 }
175 RepaintGraphWindow();
176 return 0;
177 }
178
179 //by marshmellow
180 //Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
181 // (amp may not be needed anymore)
182 //verbose will print results and demoding messages
183 //emSearch will auto search for EM410x format in bitstream
184 //askType switches decode: ask/raw = 0, ask/manchester = 1
185 int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
186 int invert=0;
187 int clk=0;
188 int maxErr=100;
189 int maxLen=0;
190 uint8_t askamp = 0;
191 char amp = param_getchar(Cmd, 0);
192 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
193 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
194 if (!maxLen) maxLen = BIGBUF_SIZE;
195 if (invert != 0 && invert != 1) {
196 PrintAndLog("Invalid argument: %s", Cmd);
197 return 0;
198 }
199 if (clk==1){
200 invert=1;
201 clk=0;
202 }
203 size_t BitLen = getFromGraphBuf(BitStream);
204 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
205 if (BitLen < 255) return 0;
206 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
207 int foundclk = 0;
208 //amp before ST check
209 if (amp == 'a' || amp == 'A') {
210 askAmp(BitStream, BitLen);
211 }
212 bool st = false;
213 size_t ststart = 0, stend = 0;
214 if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend);
215 if (st) {
216 *stCheck = st;
217 clk = (clk == 0) ? foundclk : clk;
218 CursorCPos = ststart;
219 CursorDPos = stend;
220 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
221 //Graph ST trim (for testing)
222 //for (int i = 0; i < BitLen; i++) {
223 // GraphBuffer[i] = BitStream[i]-128;
224 //}
225 //RepaintGraphWindow();
226 }
227 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
228 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
229 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
230 return 0;
231 }
232 if (errCnt > maxErr){
233 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
234 return 0;
235 }
236 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
237
238 //output
239 setDemodBuf(BitStream,BitLen,0);
240 if (verbose || g_debugMode){
241 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
242 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
243 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
244 // Now output the bitstream to the scrollback by line of 16 bits
245 printDemodBuff();
246
247 }
248 uint64_t lo = 0;
249 uint32_t hi = 0;
250 if (emSearch){
251 AskEm410xDecode(true, &hi, &lo);
252 }
253 return 1;
254 }
255 int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
256 bool st = false;
257 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
258 }
259
260 //by marshmellow
261 //takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
262 //attempts to demodulate ask while decoding manchester
263 //prints binary found and saves in graphbuffer for further commands
264 int Cmdaskmandemod(const char *Cmd)
265 {
266 char cmdp = param_getchar(Cmd, 0);
267 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
268 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
269 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
270 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
271 PrintAndLog(" <invert>, 1 to invert output");
272 PrintAndLog(" [set maximum allowed errors], default = 100");
273 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
274 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
275 PrintAndLog("");
276 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
277 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
278 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
279 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
280 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");
281 return 0;
282 }
283 bool st = true;
284 if (Cmd[0]=='s')
285 return ASKDemod_ext(Cmd++, true, true, 1, &st);
286 else if (Cmd[1] == 's')
287 return ASKDemod_ext(Cmd+=2, true, true, 1, &st);
288 else
289 return ASKDemod(Cmd, true, true, 1);
290 }
291
292 //by marshmellow
293 //manchester decode
294 //stricktly take 10 and 01 and convert to 0 and 1
295 int Cmdmandecoderaw(const char *Cmd)
296 {
297 int i =0;
298 int errCnt=0;
299 size_t size=0;
300 int invert=0;
301 int maxErr = 20;
302 char cmdp = param_getchar(Cmd, 0);
303 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
304 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
305 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
306 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
307 PrintAndLog(" [invert] invert output");
308 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
309 PrintAndLog("");
310 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
311 return 0;
312 }
313 if (DemodBufferLen==0) return 0;
314 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
315 int high=0,low=0;
316 for (;i<DemodBufferLen;++i){
317 if (DemodBuffer[i]>high) high=DemodBuffer[i];
318 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
319 BitStream[i]=DemodBuffer[i];
320 }
321 if (high>7 || low <0 ){
322 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
323 return 0;
324 }
325
326 sscanf(Cmd, "%i %i", &invert, &maxErr);
327 size=i;
328 uint8_t alignPos = 0;
329 errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
330 if (errCnt>=maxErr){
331 PrintAndLog("Too many errors: %d",errCnt);
332 return 0;
333 }
334 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
335 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
336 if (errCnt==0){
337 uint64_t id = 0;
338 uint32_t hi = 0;
339 size_t idx=0;
340 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
341 //need to adjust to set bitstream back to manchester encoded data
342 //setDemodBuf(BitStream, size, idx);
343
344 printEM410x(hi, id);
345 }
346 }
347 return 1;
348 }
349
350 //by marshmellow
351 //biphase decode
352 //take 01 or 10 = 0 and 11 or 00 = 1
353 //takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
354 // and "invert" default = 0 if 1 it will invert output
355 // the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
356 int CmdBiphaseDecodeRaw(const char *Cmd)
357 {
358 size_t size=0;
359 int offset=0, invert=0, maxErr=20, errCnt=0;
360 char cmdp = param_getchar(Cmd, 0);
361 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
362 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
363 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
364 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
365 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
366 PrintAndLog("");
367 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
368 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
369 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
370 PrintAndLog("");
371 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
372 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
373 return 0;
374 }
375 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
376 if (DemodBufferLen==0){
377 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
378 return 0;
379 }
380 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
381 memcpy(BitStream, DemodBuffer, DemodBufferLen);
382 size = DemodBufferLen;
383 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
384 if (errCnt<0){
385 PrintAndLog("Error during decode:%d", errCnt);
386 return 0;
387 }
388 if (errCnt>maxErr){
389 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
390 return 0;
391 }
392
393 if (errCnt>0){
394 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
395 }
396 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
397 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
398
399 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
400 return 1;
401 }
402
403 //by marshmellow
404 // - ASK Demod then Biphase decode GraphBuffer samples
405 int ASKbiphaseDemod(const char *Cmd, bool verbose)
406 {
407 //ask raw demod GraphBuffer first
408 int offset=0, clk=0, invert=0, maxErr=0;
409 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
410
411 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
412 size_t size = getFromGraphBuf(BitStream);
413 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
414 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
415 if ( errCnt < 0 || errCnt > maxErr ) {
416 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
417 return 0;
418 }
419
420 //attempt to Biphase decode BitStream
421 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
422 if (errCnt < 0){
423 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
424 return 0;
425 }
426 if (errCnt > maxErr) {
427 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
428 return 0;
429 }
430 //success set DemodBuffer and return
431 setDemodBuf(BitStream, size, 0);
432 if (g_debugMode || verbose){
433 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
434 printDemodBuff();
435 }
436 return 1;
437 }
438 //by marshmellow - see ASKbiphaseDemod
439 int Cmdaskbiphdemod(const char *Cmd)
440 {
441 char cmdp = param_getchar(Cmd, 0);
442 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
443 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
444 PrintAndLog(" [offset], offset to begin biphase, default=0");
445 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
446 PrintAndLog(" <invert>, 1 to invert output");
447 PrintAndLog(" [set maximum allowed errors], default = 100");
448 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
449 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
450 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
451 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
452 PrintAndLog(" NOTE: any other arg must have previous args set to work");
453 PrintAndLog("");
454 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
455 PrintAndLog("");
456 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
457 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
458 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
459 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
460 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
461 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");
462 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");
463 return 0;
464 }
465 return ASKbiphaseDemod(Cmd, true);
466 }
467
468 //by marshmellow - see ASKDemod
469 int Cmdaskrawdemod(const char *Cmd)
470 {
471 char cmdp = param_getchar(Cmd, 0);
472 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
473 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
474 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
475 PrintAndLog(" <invert>, 1 to invert output");
476 PrintAndLog(" [set maximum allowed errors], default = 100");
477 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
478 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
479 PrintAndLog("");
480 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
481 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
482 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
483 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
484 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
485 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");
486 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");
487 return 0;
488 }
489 return ASKDemod(Cmd, true, false, 0);
490 }
491
492 int AutoCorrelate(int window, bool SaveGrph, bool verbose)
493 {
494 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
495 size_t Correlation = 0;
496 int maxSum = 0;
497 int lastMax = 0;
498 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
499 for (int i = 0; i < GraphTraceLen - window; ++i) {
500 int sum = 0;
501 for (int j = 0; j < window; ++j) {
502 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
503 }
504 CorrelBuffer[i] = sum;
505 if (sum >= maxSum-100 && sum <= maxSum+100){
506 //another max
507 Correlation = i-lastMax;
508 lastMax = i;
509 if (sum > maxSum) maxSum = sum;
510 } else if (sum > maxSum){
511 maxSum=sum;
512 lastMax = i;
513 }
514 }
515 if (Correlation==0){
516 //try again with wider margin
517 for (int i = 0; i < GraphTraceLen - window; i++){
518 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
519 //another max
520 Correlation = i-lastMax;
521 lastMax = i;
522 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
523 }
524 }
525 }
526 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
527
528 if (SaveGrph){
529 GraphTraceLen = GraphTraceLen - window;
530 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
531 RepaintGraphWindow();
532 }
533 return Correlation;
534 }
535
536 int usage_data_autocorr(void)
537 {
538 //print help
539 PrintAndLog("Usage: data autocorr [window] [g]");
540 PrintAndLog("Options: ");
541 PrintAndLog(" h This help");
542 PrintAndLog(" [window] window length for correlation - default = 4000");
543 PrintAndLog(" g save back to GraphBuffer (overwrite)");
544 return 0;
545 }
546
547 int CmdAutoCorr(const char *Cmd)
548 {
549 char cmdp = param_getchar(Cmd, 0);
550 if (cmdp == 'h' || cmdp == 'H')
551 return usage_data_autocorr();
552 int window = 4000; //set default
553 char grph=0;
554 bool updateGrph = false;
555 sscanf(Cmd, "%i %c", &window, &grph);
556
557 if (window >= GraphTraceLen) {
558 PrintAndLog("window must be smaller than trace (%d samples)",
559 GraphTraceLen);
560 return 0;
561 }
562 if (grph == 'g') updateGrph=true;
563 return AutoCorrelate(window, updateGrph, true);
564 }
565
566 int CmdBitsamples(const char *Cmd)
567 {
568 int cnt = 0;
569 uint8_t got[12288];
570
571 GetFromBigBuf(got,sizeof(got),0);
572 WaitForResponse(CMD_ACK,NULL);
573
574 for (int j = 0; j < sizeof(got); j++) {
575 for (int k = 0; k < 8; k++) {
576 if(got[j] & (1 << (7 - k))) {
577 GraphBuffer[cnt++] = 1;
578 } else {
579 GraphBuffer[cnt++] = 0;
580 }
581 }
582 }
583 GraphTraceLen = cnt;
584 RepaintGraphWindow();
585 return 0;
586 }
587
588 int CmdBuffClear(const char *Cmd)
589 {
590 UsbCommand c = {CMD_BUFF_CLEAR};
591 SendCommand(&c);
592 ClearGraph(true);
593 return 0;
594 }
595
596 int CmdDec(const char *Cmd)
597 {
598 for (int i = 0; i < (GraphTraceLen / 2); ++i)
599 GraphBuffer[i] = GraphBuffer[i * 2];
600 GraphTraceLen /= 2;
601 PrintAndLog("decimated by 2");
602 RepaintGraphWindow();
603 return 0;
604 }
605 /**
606 * Undecimate - I'd call it 'interpolate', but we'll save that
607 * name until someone does an actual interpolation command, not just
608 * blindly repeating samples
609 * @param Cmd
610 * @return
611 */
612 int CmdUndec(const char *Cmd)
613 {
614 if(param_getchar(Cmd, 0) == 'h')
615 {
616 PrintAndLog("Usage: data undec [factor]");
617 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
618 PrintAndLog("Options: ");
619 PrintAndLog(" h This help");
620 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
621 PrintAndLog("Example: 'data undec 3'");
622 return 0;
623 }
624
625 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
626 //We have memory, don't we?
627 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
628 uint32_t g_index = 0, s_index = 0;
629 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
630 {
631 int count = 0;
632 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
633 swap[s_index+count] = GraphBuffer[g_index];
634
635 s_index += count;
636 g_index++;
637 }
638
639 memcpy(GraphBuffer, swap, s_index * sizeof(int));
640 GraphTraceLen = s_index;
641 RepaintGraphWindow();
642 return 0;
643 }
644
645 //by marshmellow
646 //shift graph zero up or down based on input + or -
647 int CmdGraphShiftZero(const char *Cmd)
648 {
649
650 int shift=0;
651 //set options from parameters entered with the command
652 sscanf(Cmd, "%i", &shift);
653 int shiftedVal=0;
654 for(int i = 0; i<GraphTraceLen; i++){
655 shiftedVal=GraphBuffer[i]+shift;
656 if (shiftedVal>127)
657 shiftedVal=127;
658 else if (shiftedVal<-127)
659 shiftedVal=-127;
660 GraphBuffer[i]= shiftedVal;
661 }
662 CmdNorm("");
663 return 0;
664 }
665
666 //by marshmellow
667 //use large jumps in read samples to identify edges of waves and then amplify that wave to max
668 //similar to dirtheshold, threshold commands
669 //takes a threshold length which is the measured length between two samples then determines an edge
670 int CmdAskEdgeDetect(const char *Cmd)
671 {
672 int thresLen = 25;
673 int Last = 0;
674 sscanf(Cmd, "%i", &thresLen);
675
676 for(int i = 1; i<GraphTraceLen; i++){
677 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
678 Last = 127;
679 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
680 Last = -127;
681 GraphBuffer[i-1] = Last;
682 }
683 RepaintGraphWindow();
684 return 0;
685 }
686
687 /* Print our clock rate */
688 // uses data from graphbuffer
689 // adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
690 int CmdDetectClockRate(const char *Cmd)
691 {
692 char cmdp = param_getchar(Cmd, 0);
693 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
694 PrintAndLog("Usage: data detectclock [modulation] <clock>");
695 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
696 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
697 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
698 PrintAndLog("");
699 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
700 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
701 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
702 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
703 }
704 int ans=0;
705 if (cmdp == 'a'){
706 ans = GetAskClock(Cmd+1, true, false);
707 } else if (cmdp == 'f'){
708 ans = GetFskClock("", true, false);
709 } else if (cmdp == 'n'){
710 ans = GetNrzClock("", true, false);
711 } else if (cmdp == 'p'){
712 ans = GetPskClock("", true, false);
713 } else {
714 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
715 }
716 return ans;
717 }
718
719 char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
720 {
721 static char fType[8];
722 memset(fType, 0x00, 8);
723 char *fskType = fType;
724 if (fchigh==10 && fclow==8){
725 if (invert) //fsk2a
726 memcpy(fskType, "FSK2a", 5);
727 else //fsk2
728 memcpy(fskType, "FSK2", 4);
729 } else if (fchigh == 8 && fclow == 5) {
730 if (invert)
731 memcpy(fskType, "FSK1", 4);
732 else
733 memcpy(fskType, "FSK1a", 5);
734 } else {
735 memcpy(fskType, "FSK??", 5);
736 }
737 return fskType;
738 }
739
740 //by marshmellow
741 //fsk raw demod and print binary
742 //takes 4 arguments - Clock, invert, fchigh, fclow
743 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
744 int FSKrawDemod(const char *Cmd, bool verbose)
745 {
746 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
747 uint8_t rfLen, invert, fchigh, fclow;
748 //set defaults
749 //set options from parameters entered with the command
750 rfLen = param_get8(Cmd, 0);
751 invert = param_get8(Cmd, 1);
752 fchigh = param_get8(Cmd, 2);
753 fclow = param_get8(Cmd, 3);
754
755 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
756 if (rfLen==1) {
757 invert = 1; //if invert option only is used
758 rfLen = 0;
759 }
760 }
761 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
762 size_t BitLen = getFromGraphBuf(BitStream);
763 if (BitLen==0) return 0;
764 //get field clock lengths
765 uint16_t fcs=0;
766 if (!fchigh || !fclow) {
767 fcs = countFC(BitStream, BitLen, 1);
768 if (!fcs) {
769 fchigh = 10;
770 fclow = 8;
771 } else {
772 fchigh = (fcs >> 8) & 0x00FF;
773 fclow = fcs & 0x00FF;
774 }
775 }
776 //get bit clock length
777 if (!rfLen) {
778 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
779 if (!rfLen) rfLen = 50;
780 }
781 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
782 if (size > 0) {
783 setDemodBuf(BitStream,size,0);
784
785 // Now output the bitstream to the scrollback by line of 16 bits
786 if (verbose || g_debugMode) {
787 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
788 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
789 printDemodBuff();
790 }
791
792 return 1;
793 } else {
794 if (g_debugMode) PrintAndLog("no FSK data found");
795 }
796 return 0;
797 }
798
799 //by marshmellow
800 //fsk raw demod and print binary
801 //takes 4 arguments - Clock, invert, fchigh, fclow
802 //defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
803 int CmdFSKrawdemod(const char *Cmd)
804 {
805 char cmdp = param_getchar(Cmd, 0);
806 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
807 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
808 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
809 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
810 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
811 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
812 PrintAndLog("");
813 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
814 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
815 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
816 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
817 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
818 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
819 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
820 return 0;
821 }
822 return FSKrawDemod(Cmd, true);
823 }
824
825 //by marshmellow
826 //attempt to psk1 demod graph buffer
827 int PSKDemod(const char *Cmd, bool verbose)
828 {
829 int invert=0;
830 int clk=0;
831 int maxErr=100;
832 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
833 if (clk==1){
834 invert=1;
835 clk=0;
836 }
837 if (invert != 0 && invert != 1) {
838 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
839 return 0;
840 }
841 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
842 size_t BitLen = getFromGraphBuf(BitStream);
843 if (BitLen==0) return 0;
844 int errCnt=0;
845 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
846 if (errCnt > maxErr){
847 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
848 return 0;
849 }
850 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
851 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
852 return 0;
853 }
854 if (verbose || g_debugMode){
855 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
856 if (errCnt>0){
857 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
858 }
859 }
860 //prime demod buffer for output
861 setDemodBuf(BitStream,BitLen,0);
862 return 1;
863 }
864
865 // by marshmellow
866 // takes 3 arguments - clock, invert, maxErr as integers
867 // attempts to demodulate nrz only
868 // prints binary found and saves in demodbuffer for further commands
869 int NRZrawDemod(const char *Cmd, bool verbose)
870 {
871 int invert=0;
872 int clk=0;
873 int maxErr=100;
874 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
875 if (clk==1){
876 invert=1;
877 clk=0;
878 }
879 if (invert != 0 && invert != 1) {
880 PrintAndLog("Invalid argument: %s", Cmd);
881 return 0;
882 }
883 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
884 size_t BitLen = getFromGraphBuf(BitStream);
885 if (BitLen==0) return 0;
886 int errCnt=0;
887 int clkStartIdx = 0;
888 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
889 if (errCnt > maxErr){
890 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
891 return 0;
892 }
893 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
894 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
895 return 0;
896 }
897 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
898 //prime demod buffer for output
899 setDemodBuf(BitStream,BitLen,0);
900
901 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
902 if (verbose || g_debugMode) {
903 PrintAndLog("NRZ demoded bitstream:");
904 // Now output the bitstream to the scrollback by line of 16 bits
905 printDemodBuff();
906 }
907 return 1;
908 }
909
910 int CmdNRZrawDemod(const char *Cmd)
911 {
912 char cmdp = param_getchar(Cmd, 0);
913 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
914 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
915 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
916 PrintAndLog(" <invert>, 1 for invert output");
917 PrintAndLog(" [set maximum allowed errors], default = 100.");
918 PrintAndLog("");
919 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
920 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
921 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
922 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
923 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");
924 return 0;
925 }
926 return NRZrawDemod(Cmd, true);
927 }
928
929 // by marshmellow
930 // takes 3 arguments - clock, invert, maxErr as integers
931 // attempts to demodulate psk only
932 // prints binary found and saves in demodbuffer for further commands
933 int CmdPSK1rawDemod(const char *Cmd)
934 {
935 int ans;
936 char cmdp = param_getchar(Cmd, 0);
937 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
938 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
939 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
940 PrintAndLog(" <invert>, 1 for invert output");
941 PrintAndLog(" [set maximum allowed errors], default = 100.");
942 PrintAndLog("");
943 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
944 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
945 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
946 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
947 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");
948 return 0;
949 }
950 ans = PSKDemod(Cmd, true);
951 //output
952 if (!ans){
953 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
954 return 0;
955 }
956
957 PrintAndLog("PSK1 demoded bitstream:");
958 // Now output the bitstream to the scrollback by line of 16 bits
959 printDemodBuff();
960 return 1;
961 }
962
963 // by marshmellow
964 // takes same args as cmdpsk1rawdemod
965 int CmdPSK2rawDemod(const char *Cmd)
966 {
967 int ans=0;
968 char cmdp = param_getchar(Cmd, 0);
969 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
970 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
971 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
972 PrintAndLog(" <invert>, 1 for invert output");
973 PrintAndLog(" [set maximum allowed errors], default = 100.");
974 PrintAndLog("");
975 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
976 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
977 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
978 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
979 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");
980 return 0;
981 }
982 ans=PSKDemod(Cmd, true);
983 if (!ans){
984 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
985 return 0;
986 }
987 psk1TOpsk2(DemodBuffer, DemodBufferLen);
988 PrintAndLog("PSK2 demoded bitstream:");
989 // Now output the bitstream to the scrollback by line of 16 bits
990 printDemodBuff();
991 return 1;
992 }
993
994 // by marshmellow - combines all raw demod functions into one menu command
995 int CmdRawDemod(const char *Cmd)
996 {
997 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
998
999 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1000 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1001 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1002 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1003 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1004 PrintAndLog(" <options> see specific modulation help for optional parameters");
1005 PrintAndLog("");
1006 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
1007 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1008 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
1009 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1010 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1011 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1012 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1013 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1014 return 0;
1015 }
1016 char cmdp2 = Cmd[1];
1017 int ans = 0;
1018 if (cmdp == 'f' && cmdp2 == 's'){
1019 ans = CmdFSKrawdemod(Cmd+2);
1020 } else if(cmdp == 'a' && cmdp2 == 'b'){
1021 ans = Cmdaskbiphdemod(Cmd+2);
1022 } else if(cmdp == 'a' && cmdp2 == 'm'){
1023 ans = Cmdaskmandemod(Cmd+2);
1024 } else if(cmdp == 'a' && cmdp2 == 'r'){
1025 ans = Cmdaskrawdemod(Cmd+2);
1026 } else if(cmdp == 'n' && cmdp2 == 'r'){
1027 ans = CmdNRZrawDemod(Cmd+2);
1028 } else if(cmdp == 'p' && cmdp2 == '1'){
1029 ans = CmdPSK1rawDemod(Cmd+2);
1030 } else if(cmdp == 'p' && cmdp2 == '2'){
1031 ans = CmdPSK2rawDemod(Cmd+2);
1032 } else {
1033 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1034 }
1035 return ans;
1036 }
1037
1038 int CmdGrid(const char *Cmd)
1039 {
1040 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1041 PlotGridXdefault= PlotGridX;
1042 PlotGridYdefault= PlotGridY;
1043 RepaintGraphWindow();
1044 return 0;
1045 }
1046
1047 int CmdSetGraphMarkers(const char *Cmd) {
1048 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1049 RepaintGraphWindow();
1050 return 0;
1051 }
1052
1053 int CmdHexsamples(const char *Cmd)
1054 {
1055 int i, j;
1056 int requested = 0;
1057 int offset = 0;
1058 char string_buf[25];
1059 char* string_ptr = string_buf;
1060 uint8_t got[BIGBUF_SIZE];
1061
1062 sscanf(Cmd, "%i %i", &requested, &offset);
1063
1064 /* if no args send something */
1065 if (requested == 0) {
1066 requested = 8;
1067 }
1068 if (offset + requested > sizeof(got)) {
1069 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1070 return 0;
1071 }
1072
1073 GetFromBigBuf(got,requested,offset);
1074 WaitForResponse(CMD_ACK,NULL);
1075
1076 i = 0;
1077 for (j = 0; j < requested; j++) {
1078 i++;
1079 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1080 if (i == 8) {
1081 *(string_ptr - 1) = '\0'; // remove the trailing space
1082 PrintAndLog("%s", string_buf);
1083 string_buf[0] = '\0';
1084 string_ptr = string_buf;
1085 i = 0;
1086 }
1087 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1088 *(string_ptr - 1) = '\0';
1089 PrintAndLog("%s", string_buf);
1090 string_buf[0] = '\0';
1091 }
1092 }
1093 return 0;
1094 }
1095
1096 int CmdHide(const char *Cmd)
1097 {
1098 HideGraphWindow();
1099 return 0;
1100 }
1101
1102 //zero mean GraphBuffer
1103 int CmdHpf(const char *Cmd)
1104 {
1105 int i;
1106 int accum = 0;
1107
1108 for (i = 10; i < GraphTraceLen; ++i)
1109 accum += GraphBuffer[i];
1110 accum /= (GraphTraceLen - 10);
1111 for (i = 0; i < GraphTraceLen; ++i)
1112 GraphBuffer[i] -= accum;
1113
1114 RepaintGraphWindow();
1115 return 0;
1116 }
1117
1118 uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
1119 {
1120 int i;
1121 uint8_t val = 0;
1122 for(i =0 ; i < bits_per_sample; i++)
1123 {
1124 val |= (headBit(b) << (7-i));
1125 }
1126 return val;
1127 }
1128
1129 int getSamples(const char *Cmd, bool silent)
1130 {
1131 //If we get all but the last byte in bigbuf,
1132 // we don't have to worry about remaining trash
1133 // in the last byte in case the bits-per-sample
1134 // does not line up on byte boundaries
1135
1136 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1137
1138 int n = strtol(Cmd, NULL, 0);
1139
1140 if (n == 0 || n > sizeof(got))
1141 n = sizeof(got);
1142
1143 PrintAndLog("Reading %d bytes from device memory\n", n);
1144 GetFromBigBuf(got,n,0);
1145 PrintAndLog("Data fetched");
1146 UsbCommand response;
1147 WaitForResponse(CMD_ACK, &response);
1148 uint8_t bits_per_sample = 8;
1149
1150 //Old devices without this feature would send 0 at arg[0]
1151 if(response.arg[0] > 0)
1152 {
1153 sample_config *sc = (sample_config *) response.d.asBytes;
1154 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1155 , sc->decimation);
1156 bits_per_sample = sc->bits_per_sample;
1157 }
1158 if(bits_per_sample < 8)
1159 {
1160 PrintAndLog("Unpacking...");
1161 BitstreamIn bout = { got, bits_per_sample * n, 0};
1162 int j =0;
1163 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
1164 uint8_t sample = getByte(bits_per_sample, &bout);
1165 GraphBuffer[j] = ((int) sample )- 128;
1166 }
1167 GraphTraceLen = j;
1168 PrintAndLog("Unpacked %d samples" , j );
1169 }else
1170 {
1171 for (int j = 0; j < n; j++) {
1172 GraphBuffer[j] = ((int)got[j]) - 128;
1173 }
1174 GraphTraceLen = n;
1175 }
1176
1177 RepaintGraphWindow();
1178 return 0;
1179 }
1180
1181 int CmdSamples(const char *Cmd)
1182 {
1183 return getSamples(Cmd, false);
1184 }
1185
1186 int CmdTuneSamples(const char *Cmd)
1187 {
1188 int timeout = 0, arg = FLAG_TUNE_ALL;
1189
1190 if(*Cmd == 'l') {
1191 arg = FLAG_TUNE_LF;
1192 } else if (*Cmd == 'h') {
1193 arg = FLAG_TUNE_HF;
1194 } else if (*Cmd != '\0') {
1195 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1196 return 0;
1197 }
1198
1199 printf("\nMeasuring antenna characteristics, please wait...");
1200
1201 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
1202 SendCommand(&c);
1203
1204 UsbCommand resp;
1205 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1206 timeout++;
1207 printf(".");
1208 if (timeout > 7) {
1209 PrintAndLog("\nNo response from Proxmark. Aborting...");
1210 return 1;
1211 }
1212 }
1213
1214 int peakv, peakf;
1215 int vLf125, vLf134, vHf;
1216 vLf125 = resp.arg[0] & 0xffff;
1217 vLf134 = resp.arg[0] >> 16;
1218 vHf = resp.arg[1] & 0xffff;;
1219 peakf = resp.arg[2] & 0xffff;
1220 peakv = resp.arg[2] >> 16;
1221 PrintAndLog("");
1222 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1223 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1224 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1225 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
1226
1227 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1228 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1229 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1230 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1231
1232 if (peakv < LF_UNUSABLE_V)
1233 PrintAndLog("# Your LF antenna is unusable.");
1234 else if (peakv < LF_MARGINAL_V)
1235 PrintAndLog("# Your LF antenna is marginal.");
1236 if (vHf < HF_UNUSABLE_V)
1237 PrintAndLog("# Your HF antenna is unusable.");
1238 else if (vHf < HF_MARGINAL_V)
1239 PrintAndLog("# Your HF antenna is marginal.");
1240
1241 if (peakv >= LF_UNUSABLE_V) {
1242 for (int i = 0; i < 256; i++) {
1243 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1244 }
1245 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1246 PrintAndLog("\n");
1247 GraphTraceLen = 256;
1248 ShowGraphWindow();
1249 RepaintGraphWindow();
1250 }
1251
1252 return 0;
1253 }
1254
1255
1256 int CmdLoad(const char *Cmd)
1257 {
1258 char filename[FILE_PATH_SIZE] = {0x00};
1259 int len = 0;
1260
1261 len = strlen(Cmd);
1262 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1263 memcpy(filename, Cmd, len);
1264
1265 FILE *f = fopen(filename, "r");
1266 if (!f) {
1267 PrintAndLog("couldn't open '%s'", filename);
1268 return 0;
1269 }
1270
1271 GraphTraceLen = 0;
1272 char line[80];
1273 while (fgets(line, sizeof (line), f)) {
1274 GraphBuffer[GraphTraceLen] = atoi(line);
1275 GraphTraceLen++;
1276 }
1277 fclose(f);
1278 PrintAndLog("loaded %d samples", GraphTraceLen);
1279 RepaintGraphWindow();
1280 return 0;
1281 }
1282
1283 int CmdLtrim(const char *Cmd)
1284 {
1285 int ds = atoi(Cmd);
1286 if (GraphTraceLen<=0) return 0;
1287 for (int i = ds; i < GraphTraceLen; ++i)
1288 GraphBuffer[i-ds] = GraphBuffer[i];
1289 GraphTraceLen -= ds;
1290
1291 RepaintGraphWindow();
1292 return 0;
1293 }
1294
1295 // trim graph to input argument length
1296 int CmdRtrim(const char *Cmd)
1297 {
1298 int ds = atoi(Cmd);
1299
1300 GraphTraceLen = ds;
1301
1302 RepaintGraphWindow();
1303 return 0;
1304 }
1305
1306 // trim graph (middle) piece
1307 int CmdMtrim(const char *Cmd) {
1308 int start = 0, stop = 0;
1309 sscanf(Cmd, "%i %i", &start, &stop);
1310
1311 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1312 start++; //leave start position sample
1313
1314 GraphTraceLen = stop - start;
1315 for (int i = 0; i < GraphTraceLen; i++) {
1316 GraphBuffer[i] = GraphBuffer[start+i];
1317 }
1318 return 0;
1319 }
1320
1321
1322 int CmdNorm(const char *Cmd)
1323 {
1324 int i;
1325 int max = INT_MIN, min = INT_MAX;
1326
1327 for (i = 10; i < GraphTraceLen; ++i) {
1328 if (GraphBuffer[i] > max)
1329 max = GraphBuffer[i];
1330 if (GraphBuffer[i] < min)
1331 min = GraphBuffer[i];
1332 }
1333
1334 if (max != min) {
1335 for (i = 0; i < GraphTraceLen; ++i) {
1336 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
1337 (max - min);
1338 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
1339 }
1340 }
1341 RepaintGraphWindow();
1342 return 0;
1343 }
1344
1345 int CmdPlot(const char *Cmd)
1346 {
1347 ShowGraphWindow();
1348 return 0;
1349 }
1350
1351 int CmdSave(const char *Cmd)
1352 {
1353 char filename[FILE_PATH_SIZE] = {0x00};
1354 int len = 0;
1355
1356 len = strlen(Cmd);
1357 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1358 memcpy(filename, Cmd, len);
1359
1360
1361 FILE *f = fopen(filename, "w");
1362 if(!f) {
1363 PrintAndLog("couldn't open '%s'", filename);
1364 return 0;
1365 }
1366 int i;
1367 for (i = 0; i < GraphTraceLen; i++) {
1368 fprintf(f, "%d\n", GraphBuffer[i]);
1369 }
1370 fclose(f);
1371 PrintAndLog("saved to '%s'", Cmd);
1372 return 0;
1373 }
1374
1375 int CmdScale(const char *Cmd)
1376 {
1377 CursorScaleFactor = atoi(Cmd);
1378 if (CursorScaleFactor == 0) {
1379 PrintAndLog("bad, can't have zero scale");
1380 CursorScaleFactor = 1;
1381 }
1382 RepaintGraphWindow();
1383 return 0;
1384 }
1385
1386 int CmdDirectionalThreshold(const char *Cmd)
1387 {
1388 int8_t upThres = param_get8(Cmd, 0);
1389 int8_t downThres = param_get8(Cmd, 1);
1390
1391 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1392
1393 int lastValue = GraphBuffer[0];
1394 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1395
1396 for (int i = 1; i < GraphTraceLen; ++i) {
1397 // Apply first threshold to samples heading up
1398 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1399 {
1400 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1401 GraphBuffer[i] = 127;
1402 }
1403 // Apply second threshold to samples heading down
1404 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1405 {
1406 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1407 GraphBuffer[i] = -127;
1408 }
1409 else
1410 {
1411 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1412 GraphBuffer[i] = GraphBuffer[i-1];
1413
1414 }
1415 }
1416 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1417 RepaintGraphWindow();
1418 return 0;
1419 }
1420
1421 int CmdZerocrossings(const char *Cmd)
1422 {
1423 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1424 CmdHpf("");
1425
1426 int sign = 1;
1427 int zc = 0;
1428 int lastZc = 0;
1429
1430 for (int i = 0; i < GraphTraceLen; ++i) {
1431 if (GraphBuffer[i] * sign >= 0) {
1432 // No change in sign, reproduce the previous sample count.
1433 zc++;
1434 GraphBuffer[i] = lastZc;
1435 } else {
1436 // Change in sign, reset the sample count.
1437 sign = -sign;
1438 GraphBuffer[i] = lastZc;
1439 if (sign > 0) {
1440 lastZc = zc;
1441 zc = 0;
1442 }
1443 }
1444 }
1445
1446 RepaintGraphWindow();
1447 return 0;
1448 }
1449
1450 int usage_data_bin2hex(){
1451 PrintAndLog("Usage: data bin2hex <binary_digits>");
1452 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1453 return 0;
1454 }
1455
1456 /**
1457 * @brief Utility for conversion via cmdline.
1458 * @param Cmd
1459 * @return
1460 */
1461 int Cmdbin2hex(const char *Cmd)
1462 {
1463 int bg =0, en =0;
1464 if(param_getptr(Cmd, &bg, &en, 0))
1465 {
1466 return usage_data_bin2hex();
1467 }
1468 //Number of digits supplied as argument
1469 size_t length = en - bg +1;
1470 size_t bytelen = (length+7) / 8;
1471 uint8_t* arr = (uint8_t *) malloc(bytelen);
1472 memset(arr, 0, bytelen);
1473 BitstreamOut bout = { arr, 0, 0 };
1474
1475 for(; bg <= en ;bg++)
1476 {
1477 char c = Cmd[bg];
1478 if( c == '1') pushBit(&bout, 1);
1479 else if( c == '0') pushBit(&bout, 0);
1480 else PrintAndLog("Ignoring '%c'", c);
1481 }
1482
1483 if(bout.numbits % 8 != 0)
1484 {
1485 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1486 }
1487
1488 //Uses printf instead of PrintAndLog since the latter
1489 // adds linebreaks to each printout - this way was more convenient since we don't have to
1490 // allocate a string and write to that first...
1491 for(size_t x = 0; x < bytelen ; x++)
1492 {
1493 printf("%02X", arr[x]);
1494 }
1495 printf("\n");
1496 free(arr);
1497 return 0;
1498 }
1499
1500 int usage_data_hex2bin() {
1501 PrintAndLog("Usage: data hex2bin <hex_digits>");
1502 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1503 return 0;
1504
1505 }
1506
1507 int Cmdhex2bin(const char *Cmd)
1508 {
1509 int bg =0, en =0;
1510 if(param_getptr(Cmd, &bg, &en, 0))
1511 {
1512 return usage_data_hex2bin();
1513 }
1514
1515
1516 while(bg <= en )
1517 {
1518 char x = Cmd[bg++];
1519 // capitalize
1520 if (x >= 'a' && x <= 'f')
1521 x -= 32;
1522 // convert to numeric value
1523 if (x >= '0' && x <= '9')
1524 x -= '0';
1525 else if (x >= 'A' && x <= 'F')
1526 x -= 'A' - 10;
1527 else
1528 continue;
1529
1530 //Uses printf instead of PrintAndLog since the latter
1531 // adds linebreaks to each printout - this way was more convenient since we don't have to
1532 // allocate a string and write to that first...
1533
1534 for(int i= 0 ; i < 4 ; ++i)
1535 printf("%d",(x >> (3 - i)) & 1);
1536 }
1537 printf("\n");
1538
1539 return 0;
1540 }
1541
1542 static command_t CommandTable[] =
1543 {
1544 {"help", CmdHelp, 1, "This help"},
1545 {"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)"},
1546 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
1547 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
1548 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
1549 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1550 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1551 {"dec", CmdDec, 1, "Decimate samples"},
1552 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
1553 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
1554 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1555 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1556 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1557 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
1558 {"hide", CmdHide, 1, "Hide graph window"},
1559 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1560 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1561 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1562 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1563 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
1564 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
1565 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1566 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1567 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
1568 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1569 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1570 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1571 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
1572 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1573 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
1574 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
1575 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1576 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1577 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1578 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1579 {NULL, NULL, 0, NULL}
1580 };
1581
1582 int CmdData(const char *Cmd)
1583 {
1584 CmdsParse(CommandTable, Cmd);
1585 return 0;
1586 }
1587
1588 int CmdHelp(const char *Cmd)
1589 {
1590 CmdsHelp(CommandTable);
1591 return 0;
1592 }
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