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FIX: a shot at fixing the "_" underscore problem in fileutils.c. This one uses _ifde...
[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 <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <limits.h>
15 #include "proxmark3.h"
16 #include "data.h"
17 #include "ui.h"
18 #include "graph.h"
19 #include "cmdparser.h"
20 #include "util.h"
21 #include "cmdmain.h"
22 #include "cmddata.h"
23 #include "lfdemod.h"
24
25 static int CmdHelp(const char *Cmd);
26
27 int CmdAmp(const char *Cmd)
28 {
29 int i, rising, falling;
30 int max = INT_MIN, min = INT_MAX;
31
32 DetectHighLowInGraph( &max, &min, FALSE);
33
34 if (max != min) {
35 rising = falling = 0;
36
37 for (i = 0; i < GraphTraceLen; ++i) {
38 if (GraphBuffer[i + 1] < GraphBuffer[i]) {
39 if (rising) {
40 GraphBuffer[i] = max;
41 rising = 0;
42 }
43 falling = 1;
44 }
45 if (GraphBuffer[i + 1] > GraphBuffer[i]) {
46 if (falling) {
47 GraphBuffer[i] = min;
48 falling = 0;
49 }
50 rising= 1;
51 }
52 }
53 }
54 RepaintGraphWindow();
55 return 0;
56 }
57
58 /*
59 * Generic command to demodulate ASK.
60 *
61 * Argument is convention: positive or negative (High mod means zero
62 * or high mod means one)
63 *
64 * Updates the Graph trace with 0/1 values
65 *
66 * Arguments:
67 * c : 0 or 1
68 */
69 //this method is dependant on all highs and lows to be the same(or clipped) this creates issues[marshmellow] it also ignores the clock
70 int Cmdaskdemod(const char *Cmd)
71 {
72 int i;
73 int c, high = 0, low = 0;
74
75 sscanf(Cmd, "%i", &c);
76
77 if (c != 0 && c != 1) {
78 PrintAndLog("Invalid argument: %s", Cmd);
79 return 0;
80 }
81
82 DetectHighLowInGraph( &high, &low, FALSE);
83
84 high = abs(high * .75);
85 low = abs(low * .75);
86
87 //prime loop
88 if (GraphBuffer[0] > 0) {
89 GraphBuffer[0] = 1-c;
90 } else {
91 GraphBuffer[0] = c;
92 }
93
94 for (i = 1; i < GraphTraceLen; ++i) {
95 /* Transitions are detected at each peak
96 * Transitions are either:
97 * - we're low: transition if we hit a high
98 * - we're high: transition if we hit a low
99 * (we need to do it this way because some tags keep high or
100 * low for long periods, others just reach the peak and go
101 * down)
102 */
103 if ((GraphBuffer[i] == high) && (GraphBuffer[i - 1] == c)) {
104 GraphBuffer[i] = 1 - c;
105 } else if ((GraphBuffer[i] == low) && (GraphBuffer[i - 1] == (1 - c))){
106 GraphBuffer[i] = c;
107 } else {
108 /* No transition */
109 GraphBuffer[i] = GraphBuffer[i - 1];
110 }
111 }
112 RepaintGraphWindow();
113 return 0;
114 }
115
116 void printBitStream(uint8_t bits[], uint32_t bitLen){
117
118 uint32_t i = 0;
119 if (bitLen < 16) {
120 PrintAndLog("Too few bits found: %d",bitLen);
121 return;
122 }
123 if (bitLen > 512)
124 bitLen = 512;
125
126 if ( ( bitLen % 16 ) > 0) {
127 bitLen = ((bitLen / 16) * 16);
128 PrintAndLog("ICE: equally divided with 16 = %d",bitLen);
129 }
130
131 for (i = 0; i <= ( bitLen - 16); i += 16) {
132 PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
133 bits[i],
134 bits[i+1],
135 bits[i+2],
136 bits[i+3],
137 bits[i+4],
138 bits[i+5],
139 bits[i+6],
140 bits[i+7],
141 bits[i+8],
142 bits[i+9],
143 bits[i+10],
144 bits[i+11],
145 bits[i+12],
146 bits[i+13],
147 bits[i+14],
148 bits[i+15]);
149 }
150 return;
151 }
152
153 void printEM410x(uint64_t id) {
154
155 if ( id <= 0 ) return;
156
157 uint64_t id2lo = 0;
158 uint32_t i,j;
159 i = j = 0;
160
161 for (j = 5; j > 0; j--){
162 for (i = 0; i < 8; i++){
163 id2lo = ( id2lo << 1LL)|((id & ( 1 << ( i +( ( j-1 ) * 8 )))) >> ( i + (( j-1) *8 )));
164 }
165 }
166 //output em id
167 PrintAndLog("EM TAG ID : %010llx", id);
168 PrintAndLog("Unique TAG ID: %010llx", id2lo);
169 PrintAndLog("DEZ 8 : %08lld", id & 0xFFFFFF);
170 PrintAndLog("DEZ 10 : %010lld", id & 0xFFFFFF);
171 PrintAndLog("DEZ 5.5 : %05lld.%05lld", (id>>16LL) & 0xFFFF, (id & 0xFFFF));
172 PrintAndLog("DEZ 3.5A : %03lld.%05lld", (id>>32ll), (id & 0xFFFF));
173 PrintAndLog("DEZ 14/IK2 : %014lld", id);
174 PrintAndLog("DEZ 15/IK3 : %015lld", id2lo);
175 PrintAndLog("Other : %05lld_%03lld_%08lld", (id & 0xFFFF), (( id >> 16LL) & 0xFF), (id & 0xFFFFFF));
176 }
177
178 int CmdEm410xDecode(const char *Cmd)
179 {
180 uint64_t id = 0;
181 uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0x00};
182 uint32_t len = GetFromGraphBuf(bits);
183 id = Em410xDecode(bits, len);
184 printEM410x(id);
185 if ( id > 0 )
186 return 1;
187 return 0;
188 }
189
190 //by marshmellow
191 //takes 2 arguments - clock and invert both as integers
192 //attempts to demodulate ask while decoding manchester
193 //prints binary found and saves in graphbuffer for further commands
194 int Cmdaskmandemod(const char *Cmd)
195 {
196 int invert = 0;
197 int clk = 0;
198
199 sscanf(Cmd, "%i %i", &clk, &invert);
200
201 if (invert != 0 && invert != 1) {
202 PrintAndLog("Invalid argument: %s", Cmd);
203 return 0;
204 }
205
206 uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0x00};
207 uint32_t len = GetFromGraphBuf(bits);
208
209 int errCnt = askmandemod(bits, &len, &clk, &invert);
210
211 if (errCnt < 0) return 0;
212 if (len < 16) return 0;
213
214 PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,len);
215
216 if (errCnt > 0){
217 PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
218 }
219
220 PrintAndLog("ASK/Manchester decoded bitstream:");
221
222 printBitStream(bits, len);
223 uint64_t lo = Em410xDecode(bits, len);
224
225 if (lo > 0){
226 SetGraphBuf(bits,len);
227 PrintAndLog("EM410x pattern found: ");
228 printEM410x(lo);
229 return 1;
230 }
231 return 0;
232 }
233
234 //by marshmellow
235 //manchester decode
236 //stricktly take 10 and 01 and convert to 0 and 1
237 int Cmdmandecoderaw(const char *Cmd)
238 {
239 int i = 0;
240 int errCnt = 0;
241 int bitnum = 0;
242 uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0x00};
243 int high = 0, low = 0;
244
245 for (; i < GraphTraceLen; ++i){
246 if (GraphBuffer[i] > high) high = GraphBuffer[i];
247 else if (GraphBuffer[i] < low) low = GraphBuffer[i];
248 bits[i] = GraphBuffer[i];
249 }
250
251 if (high > 1 || low < 0 ){
252 PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode");
253 return 0;
254 }
255
256 bitnum = i;
257 errCnt = manrawdecode(bits, &bitnum);
258
259 if (errCnt>=20){
260 PrintAndLog("Too many errors: %d",errCnt);
261 return 0;
262 }
263
264 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
265 printBitStream(bits,bitnum);
266
267 if (errCnt==0){
268 //put back in graphbuffer
269 SetGraphBuf(bits, bitnum);
270
271 uint64_t id = Em410xDecode(bits,i);
272 printEM410x(id);
273 }
274 return 1;
275 }
276
277 //by marshmellow
278 //biphase decode
279 //take 01 or 10 = 0 and 11 or 00 = 1
280 //takes 1 argument "offset" default = 0 if 1 it will shift the decode by one bit
281 // since it is not like manchester and doesn't have an incorrect bit pattern we
282 // cannot determine if our decode is correct or if it should be shifted by one bit
283 // the argument offset allows us to manually shift if the output is incorrect
284 // (better would be to demod and decode at the same time so we can distinguish large
285 // width waves vs small width waves to help the decode positioning) or askbiphdemod
286 int CmdBiphaseDecodeRaw(const char *Cmd)
287 {
288 int i = 0;
289 int errCnt = 0;
290 int bitnum = 0;
291 int offset = 0;
292 int high = 0, low = 0;
293 sscanf(Cmd, "%i", &offset);
294
295 uint8_t bits[MAX_GRAPH_TRACE_LEN]={0};
296
297 //get graphbuffer & high and low
298 for (; i<GraphTraceLen; ++i){
299 if (GraphBuffer[i] > high) high = GraphBuffer[i];
300 else if (GraphBuffer[i] < low) low = GraphBuffer[i];
301 bits[i] = GraphBuffer[i];
302 }
303 if (high > 1 || low < 0){
304 PrintAndLog("Error: please raw demod the wave first then decode");
305 return 0;
306 }
307 bitnum = i;
308 errCnt = BiphaseRawDecode(bits, &bitnum, offset);
309 if (errCnt >= 20){
310 PrintAndLog("Too many errors attempting to decode: %d", errCnt);
311 return 0;
312 }
313 PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:", offset, errCnt);
314 printBitStream(bits, bitnum);
315 PrintAndLog("\nif bitstream does not look right try offset=1");
316 return 1;
317 }
318
319
320 //by marshmellow
321 //takes 2 arguments - clock and invert both as integers
322 //attempts to demodulate ask only
323 //prints binary found and saves in graphbuffer for further commands
324 int Cmdaskrawdemod(const char *Cmd)
325 {
326 int invert = 0;
327 int clk = 0;
328
329 sscanf(Cmd, "%i %i", &clk, &invert);
330
331 if (invert != 0 && invert != 1 ) {
332 PrintAndLog("Invalid argument: %s", Cmd);
333 return 0;
334 }
335
336 if ( clock < 0 ) {
337 PrintAndLog("Wrong clock argument");
338 return 0;
339 }
340
341 uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0x00};
342 int len = GetFromGraphBuf(bits);
343 int errCnt = 0;
344
345 errCnt = askrawdemod(bits, &len, &clk, &invert);
346
347 //throw away static - allow 1 and -1 (in case of threshold command first)
348 if (errCnt == -1) {
349 PrintAndLog("no data found");
350 return 0;
351 }
352
353 if (len < 16) return 0;
354
355 PrintAndLog("Using Clock: %d - invert: %d - Bits Found: %d",clk,invert,len);
356
357 //move BitStream back to GraphBuffer
358 SetGraphBuf(bits, len);
359
360 if (errCnt > 0){
361 PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
362 }
363
364 PrintAndLog("ASK demoded bitstream:");
365
366 // Now output the bitstream to the scrollback by line of 16 bits
367 printBitStream(bits,len);
368 return 1;
369 }
370
371 int CmdAutoCorr(const char *Cmd)
372 {
373 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
374
375 int window = atoi(Cmd);
376
377 if (window == 0) {
378 PrintAndLog("needs a window");
379 return 0;
380 }
381 if (window >= GraphTraceLen) {
382 PrintAndLog("window must be smaller than trace (%d samples)",
383 GraphTraceLen);
384 return 0;
385 }
386
387 PrintAndLog("performing %d correlations", GraphTraceLen - window);
388
389 for (int i = 0; i < GraphTraceLen - window; ++i) {
390 int sum = 0;
391 for (int j = 0; j < window; ++j) {
392 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
393 }
394 CorrelBuffer[i] = sum;
395 }
396 GraphTraceLen = GraphTraceLen - window;
397 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
398
399 RepaintGraphWindow();
400 return 0;
401 }
402
403 int CmdBitsamples(const char *Cmd)
404 {
405 int cnt = 0;
406 uint8_t got[10000];
407
408 GetFromBigBuf(got,sizeof(got),0);
409 WaitForResponse(CMD_ACK,NULL);
410
411 for (int j = 0; j < sizeof(got); j++) {
412 for (int k = 0; k < 8; k++) {
413 if(got[j] & (1 << (7 - k))) {
414 GraphBuffer[cnt++] = 1;
415 } else {
416 GraphBuffer[cnt++] = 0;
417 }
418 }
419 }
420 GraphTraceLen = cnt;
421 RepaintGraphWindow();
422 return 0;
423 }
424
425 /*
426 * Convert to a bitstream
427 */
428 int CmdBitstream(const char *Cmd)
429 {
430 int i, j;
431 int bit;
432 int gtl;
433 int clock;
434 int low = 0;
435 int high = 0;
436 int hithigh, hitlow, first;
437
438 /* Detect high and lows and clock */
439 DetectHighLowInGraph( &high, &low, FALSE);
440
441 /* Get our clock */
442 clock = GetClock(Cmd, 0);
443 gtl = ClearGraph(0);
444
445 bit = 0;
446 for (i = 0; i < (int)(gtl / clock); ++i)
447 {
448 hithigh = 0;
449 hitlow = 0;
450 first = 1;
451 /* Find out if we hit both high and low peaks */
452 for (j = 0; j < clock; ++j)
453 {
454 if (GraphBuffer[(i * clock) + j] == high)
455 hithigh = 1;
456 else if (GraphBuffer[(i * clock) + j] == low)
457 hitlow = 1;
458 /* it doesn't count if it's the first part of our read
459 because it's really just trailing from the last sequence */
460 if (first && (hithigh || hitlow))
461 hithigh = hitlow = 0;
462 else
463 first = 0;
464
465 if (hithigh && hitlow)
466 break;
467 }
468
469 /* If we didn't hit both high and low peaks, we had a bit transition */
470 if (!hithigh || !hitlow)
471 bit ^= 1;
472
473 AppendGraph(0, clock, bit);
474 }
475
476 RepaintGraphWindow();
477 return 0;
478 }
479
480 int CmdBuffClear(const char *Cmd)
481 {
482 UsbCommand c = {CMD_BUFF_CLEAR};
483 SendCommand(&c);
484 ClearGraph(true);
485 return 0;
486 }
487
488 int CmdDec(const char *Cmd)
489 {
490 for (int i = 0; i < (GraphTraceLen / 2); ++i)
491 GraphBuffer[i] = GraphBuffer[i * 2];
492 GraphTraceLen /= 2;
493 PrintAndLog("decimated by 2");
494 RepaintGraphWindow();
495 return 0;
496 }
497
498 /* Print our clock rate */
499 // uses data from graphbuffer
500 int CmdDetectClockRate(const char *Cmd)
501 {
502 GetClock("",1);
503 return 0;
504 }
505
506 //by marshmellow
507 //fsk raw demod and print binary
508 //takes 4 arguments - Clock, invert, rchigh, rclow
509 //defaults: clock = 50, invert=0, rchigh=10, rclow=8 (RF/10 RF/8 (fsk2a))
510 int CmdFSKrawdemod(const char *Cmd)
511 {
512 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
513 int rfLen = 50;
514 int invert = 0;
515 int fchigh = 10;
516 int fclow = 8;
517
518 //set options from parameters entered with the command
519 sscanf(Cmd, "%i %i %i %i", &rfLen, &invert, &fchigh, &fclow);
520
521 // A lots of checks if chigh, clow is out-of bounds.
522
523 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
524
525 rfLen = 50;
526
527 //if invert option only is used
528 if (rfLen == 1){
529 invert=1;
530 }
531 }
532
533 PrintAndLog("Args invert: %d - Clock:%d - FC high:%d - FC low: %d",invert,rfLen,fchigh, fclow);
534
535 uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0x00};
536 uint32_t len = GetFromGraphBuf(bits);
537
538 int size = fskdemod(bits, len,(uint8_t)rfLen, (uint8_t)invert, (uint8_t)fchigh, (uint8_t)fclow);
539
540 if (size > 0) {
541 PrintAndLog("FSK decoded bitstream:");
542
543 SetGraphBuf(bits, size);
544
545 // Now output the bitstream to the scrollback by line of 16 bits
546 // only output a max of 8 blocks of 32 bits most tags will have full bit stream inside that sample size
547 if(size > (8*32)+2)
548 size = (8*32)+2;
549 printBitStream(bits,size);
550 } else {
551 PrintAndLog("no FSK data found");
552 }
553 return 0;
554 }
555
556 //by marshmellow (based on existing demod + holiman's refactor)
557 //HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
558 //print full HID Prox ID and some bit format details if found
559 int CmdFSKdemodHID(const char *Cmd)
560 {
561 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
562 uint32_t hi2=0, hi=0, lo=0;
563
564 uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0x00};
565 uint32_t BitLen = GetFromGraphBuf(BitStream);
566
567 //get binary from fsk wave
568 size_t size = HIDdemodFSK(BitStream,BitLen,&hi2,&hi,&lo);
569
570 if (size < 0){
571 PrintAndLog("Error demoding fsk");
572 return 0;
573 }
574
575 if (hi2==0 && hi==0 && lo==0) return 0;
576
577 //extra large HID tags
578 if (hi2 != 0){
579 PrintAndLog("TAG ID: %x%08x%08x (%d)",
580 (unsigned int) hi2,
581 (unsigned int) hi,
582 (unsigned int) lo,
583 (unsigned int) (lo>>1) & 0xFFFF);
584 SetGraphBuf(BitStream,BitLen);
585 return 1;
586 } else {
587 //standard HID tags <38 bits
588 uint8_t fmtLen = 0;
589 uint32_t fc = 0;
590 uint32_t cardnum = 0;
591
592 //if bit 38 is set then < 37 bit format is used
593 if (((hi>>5) & 1)==1){
594 uint32_t lo2 = 0;
595
596 //get bits 21-37 to check for format len bit
597 lo2 = (((hi & 15) << 12) | (lo>>20));
598 uint8_t idx3 = 1;
599
600 //find last bit set to 1 (format len bit)
601 while( lo2 > 1){
602 lo2=lo2>>1;
603 idx3++;
604 }
605 fmtLen = idx3 + 19;
606 fc = 0;
607 cardnum = 0;
608
609 if(fmtLen==26){
610 cardnum = (lo>>1)&0xFFFF;
611 fc = (lo>>17)&0xFF;
612 }
613 if(fmtLen==37){
614 cardnum = (lo>>1)&0x7FFFF;
615 fc = ((hi&0xF)<<12)|(lo>>20);
616 }
617 if(fmtLen==34){
618 cardnum = (lo>>1)&0xFFFF;
619 fc= ((hi&1)<<15)|(lo>>17);
620 }
621 if(fmtLen==35){
622 cardnum = (lo>>1)&0xFFFFF;
623 fc = ((hi&1)<<11)|(lo>>21);
624 }
625 } else {
626 //if bit 38 is not set then 37 bit format is used
627 fmtLen= 37;
628 fc =0;
629 cardnum=0;
630
631 if (fmtLen==37){
632 cardnum = (lo>>1) & 0x7FFFF;
633 fc = ((hi&0xF) << 12) | (lo >> 20);
634 }
635 }
636 PrintAndLog("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
637 (unsigned int) hi,
638 (unsigned int) lo,
639 (unsigned int) (lo>>1) & 0xFFFF,
640 (unsigned int) fmtLen,
641 (unsigned int) fc,
642 (unsigned int) cardnum);
643 SetGraphBuf(BitStream,BitLen);
644 return 1;
645 }
646 return 0;
647 }
648
649 //by marshmellow
650 //IO-Prox demod - FSK RF/64 with preamble of 000000001
651 //print ioprox ID and some format details
652 int CmdFSKdemodIO(const char *Cmd)
653 {
654 if (GraphTraceLen < 65) {
655 PrintAndLog("data samples size is too small");
656 return 0;
657 }
658
659 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
660 //set defaults
661 int idx = 0;
662 uint8_t bits[MAX_GRAPH_TRACE_LEN] = {0x00};
663 uint32_t bitlen = GetFromGraphBuf(bits);
664
665 //get binary from fsk wave
666 idx = IOdemodFSK(bits, bitlen);
667
668 if (idx == 0) {
669 return 0;
670 }
671 if (idx == -1) {
672 PrintAndLog("data samples size is too small");
673 return 0;
674 }
675 if (idx == -2) {
676 PrintAndLog("Data samples has too much noice");
677 return 0;
678 }
679 if (idx == -3){
680 PrintAndLog("No good demod");
681 return 0;
682 }
683
684 if (idx+64 > bitlen) return 0;
685
686 //Index map
687 //0 10 20 30 40 50 60
688 //| | | | | | |
689 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
690 //-----------------------------------------------------------------------------
691 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
692 //
693 //XSF(version)facility:codeone+codetwo (raw)
694 //Handle the data
695
696 PrintAndLog("%d%d%d%d%d%d%d%d %d", bits[idx] , bits[idx+1], bits[idx+2], bits[idx+3], bits[idx+4], bits[idx+5], bits[idx+6], bits[idx+7], bits[idx+8]);
697 PrintAndLog("%d%d%d%d%d%d%d%d %d", bits[idx+9] , bits[idx+10], bits[idx+11], bits[idx+12], bits[idx+13], bits[idx+14], bits[idx+15], bits[idx+16], bits[idx+17]);
698 PrintAndLog("%d%d%d%d%d%d%d%d %d facility", bits[idx+18], bits[idx+19], bits[idx+20], bits[idx+21], bits[idx+22], bits[idx+23], bits[idx+24], bits[idx+25], bits[idx+26]);
699 PrintAndLog("%d%d%d%d%d%d%d%d %d version", bits[idx+27], bits[idx+28], bits[idx+29], bits[idx+30], bits[idx+31], bits[idx+32], bits[idx+33], bits[idx+34], bits[idx+35]);
700 PrintAndLog("%d%d%d%d%d%d%d%d %d code1", bits[idx+36], bits[idx+37], bits[idx+38], bits[idx+39], bits[idx+40], bits[idx+41], bits[idx+42], bits[idx+43], bits[idx+44]);
701 PrintAndLog("%d%d%d%d%d%d%d%d %d code2", bits[idx+45], bits[idx+46], bits[idx+47], bits[idx+48], bits[idx+49], bits[idx+50], bits[idx+51], bits[idx+52], bits[idx+53]);
702 PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum", bits[idx+54], bits[idx+55], bits[idx+56], bits[idx+57], bits[idx+58], bits[idx+59], bits[idx+60], bits[idx+61], bits[idx+62], bits[idx+63]);
703
704 uint32_t code = bytebits_to_byte(bits+idx,32);
705 uint32_t code2 = bytebits_to_byte(bits+idx+32,32);
706 uint8_t version = bytebits_to_byte(bits+idx+27,8); //14,4
707 uint8_t facilitycode = bytebits_to_byte(bits+idx+18,8) ;
708 uint16_t number = (bytebits_to_byte(bits+idx+36,8)<<8)|(bytebits_to_byte(bits+idx+45,8)); //36,9
709
710 PrintAndLog("XSF(%02d)%02x:%05d (%08x%08x)", version, facilitycode, number, code, code2);
711 SetGraphBuf(bits, bitlen);
712 return 1;
713 }
714
715 int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
716 {
717 static const int LowTone[] = {
718 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
719 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
720 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
721 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
722 1, 1, 1, 1, 1, -1, -1, -1, -1, -1
723 };
724 static const int HighTone[] = {
725 1, 1, 1, 1, 1, -1, -1, -1, -1,
726 1, 1, 1, 1, -1, -1, -1, -1,
727 1, 1, 1, 1, -1, -1, -1, -1,
728 1, 1, 1, 1, -1, -1, -1, -1,
729 1, 1, 1, 1, -1, -1, -1, -1,
730 1, 1, 1, 1, -1, -1, -1, -1, -1,
731 };
732
733 int lowLen = sizeof (LowTone) / sizeof (int);
734 int highLen = sizeof (HighTone) / sizeof (int);
735 int convLen = (highLen > lowLen) ? highLen : lowLen;
736 uint32_t hi = 0, lo = 0;
737
738 int i, j;
739 int minMark = 0, maxMark = 0;
740
741 for (i = 0; i < GraphTraceLen - convLen; ++i) {
742 int lowSum = 0, highSum = 0;
743
744 for (j = 0; j < lowLen; ++j) {
745 lowSum += LowTone[j]*GraphBuffer[i+j];
746 }
747 for (j = 0; j < highLen; ++j) {
748 highSum += HighTone[j] * GraphBuffer[i + j];
749 }
750 lowSum = abs(100 * lowSum / lowLen);
751 highSum = abs(100 * highSum / highLen);
752 GraphBuffer[i] = (highSum << 16) | lowSum;
753 }
754
755 for(i = 0; i < GraphTraceLen - convLen - 16; ++i) {
756 int lowTot = 0, highTot = 0;
757 // 10 and 8 are f_s divided by f_l and f_h, rounded
758 for (j = 0; j < 10; ++j) {
759 lowTot += (GraphBuffer[i+j] & 0xffff);
760 }
761 for (j = 0; j < 8; j++) {
762 highTot += (GraphBuffer[i + j] >> 16);
763 }
764 GraphBuffer[i] = lowTot - highTot;
765 if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i];
766 if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i];
767 }
768
769 GraphTraceLen -= (convLen + 16);
770 RepaintGraphWindow();
771
772 // Find bit-sync (3 lo followed by 3 high) (HID ONLY)
773 int max = 0, maxPos = 0;
774 for (i = 0; i < 6000; ++i) {
775 int dec = 0;
776 for (j = 0; j < 3 * lowLen; ++j) {
777 dec -= GraphBuffer[i + j];
778 }
779 for (; j < 3 * (lowLen + highLen ); ++j) {
780 dec += GraphBuffer[i + j];
781 }
782 if (dec > max) {
783 max = dec;
784 maxPos = i;
785 }
786 }
787
788 // place start of bit sync marker in graph
789 GraphBuffer[maxPos] = maxMark;
790 GraphBuffer[maxPos + 1] = minMark;
791
792 maxPos += j;
793
794 // place end of bit sync marker in graph
795 GraphBuffer[maxPos] = maxMark;
796 GraphBuffer[maxPos+1] = minMark;
797
798 PrintAndLog("actual data bits start at sample %d", maxPos);
799 PrintAndLog("length %d/%d", highLen, lowLen);
800
801 uint8_t bits[46] = {0x00};
802
803 // find bit pairs and manchester decode them
804 for (i = 0; i < arraylen(bits) - 1; ++i) {
805 int dec = 0;
806 for (j = 0; j < lowLen; ++j) {
807 dec -= GraphBuffer[maxPos + j];
808 }
809 for (; j < lowLen + highLen; ++j) {
810 dec += GraphBuffer[maxPos + j];
811 }
812 maxPos += j;
813 // place inter bit marker in graph
814 GraphBuffer[maxPos] = maxMark;
815 GraphBuffer[maxPos + 1] = minMark;
816
817 // hi and lo form a 64 bit pair
818 hi = (hi << 1) | (lo >> 31);
819 lo = (lo << 1);
820 // store decoded bit as binary (in hi/lo) and text (in bits[])
821 if(dec < 0) {
822 bits[i] = '1';
823 lo |= 1;
824 } else {
825 bits[i] = '0';
826 }
827 }
828 PrintAndLog("bits: '%s'", bits);
829 PrintAndLog("hex: %08x %08x", hi, lo);
830 return 0;
831 }
832
833 int CmdGrid(const char *Cmd)
834 {
835 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
836 PlotGridXdefault= PlotGridX;
837 PlotGridYdefault= PlotGridY;
838 RepaintGraphWindow();
839 return 0;
840 }
841
842 int CmdHexsamples(const char *Cmd)
843 {
844 int i, j;
845 int requested = 0;
846 int offset = 0;
847 char string_buf[25];
848 char* string_ptr = string_buf;
849 uint8_t got[40000];
850
851 sscanf(Cmd, "%i %i", &requested, &offset);
852
853 /* if no args send something */
854 if (requested == 0) {
855 requested = 8;
856 }
857 if (offset + requested > sizeof(got)) {
858 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 40000");
859 return 0;
860 }
861
862 GetFromBigBuf(got,requested,offset);
863 WaitForResponse(CMD_ACK,NULL);
864
865 i = 0;
866 for (j = 0; j < requested; j++) {
867 i++;
868 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
869 if (i == 8) {
870 *(string_ptr - 1) = '\0'; // remove the trailing space
871 PrintAndLog("%s", string_buf);
872 string_buf[0] = '\0';
873 string_ptr = string_buf;
874 i = 0;
875 }
876 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
877 *(string_ptr - 1) = '\0';
878 PrintAndLog("%s", string_buf);
879 string_buf[0] = '\0';
880 }
881 }
882 return 0;
883 }
884
885 int CmdHide(const char *Cmd)
886 {
887 HideGraphWindow();
888 return 0;
889 }
890
891 int CmdHpf(const char *Cmd)
892 {
893 int i;
894 int accum = 0;
895
896 for (i = 10; i < GraphTraceLen; ++i)
897 accum += GraphBuffer[i];
898 accum /= (GraphTraceLen - 10);
899 for (i = 0; i < GraphTraceLen; ++i)
900 GraphBuffer[i] -= accum;
901
902 RepaintGraphWindow();
903 return 0;
904 }
905
906 int CmdSamples(const char *Cmd)
907 {
908 uint8_t got[40000] = {0x00};
909
910 int n = strtol(Cmd, NULL, 0);
911 if (n == 0)
912 n = 20000;
913
914 if (n > sizeof(got))
915 n = sizeof(got);
916
917 PrintAndLog("Reading %d samples from device memory\n", n);
918 GetFromBigBuf(got,n,0);
919 WaitForResponse(CMD_ACK,NULL);
920 for (int j = 0; j < n; ++j) {
921 GraphBuffer[j] = ((int)got[j]) - 128;
922 }
923 GraphTraceLen = n;
924 RepaintGraphWindow();
925 return 0;
926 }
927
928 int CmdTuneSamples(const char *Cmd)
929 {
930 int timeout = 0;
931 printf("\nMeasuring antenna characteristics, please wait...");
932
933 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING};
934 SendCommand(&c);
935
936 UsbCommand resp;
937 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
938 timeout++;
939 printf(".");
940 if (timeout > 7) {
941 PrintAndLog("\nNo response from Proxmark. Aborting...");
942 return 1;
943 }
944 }
945
946 int peakv, peakf;
947 int vLf125, vLf134, vHf;
948 vLf125 = resp.arg[0] & 0xffff;
949 vLf134 = resp.arg[0] >> 16;
950 vHf = resp.arg[1] & 0xffff;;
951 peakf = resp.arg[2] & 0xffff;
952 peakv = resp.arg[2] >> 16;
953 PrintAndLog("");
954 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
955 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
956 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
957 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
958 if (peakv<2000)
959 PrintAndLog("# Your LF antenna is unusable.");
960 else if (peakv<10000)
961 PrintAndLog("# Your LF antenna is marginal.");
962 if (vHf<2000)
963 PrintAndLog("# Your HF antenna is unusable.");
964 else if (vHf<5000)
965 PrintAndLog("# Your HF antenna is marginal.");
966
967 for (int i = 0; i < 256; i++) {
968 GraphBuffer[i] = resp.d.asBytes[i] - 128;
969 }
970
971 PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n");
972 PrintAndLog("\n");
973 GraphTraceLen = 256;
974 ShowGraphWindow();
975
976 return 0;
977 }
978
979 int CmdLoad(const char *Cmd)
980 {
981 char filename[FILE_PATH_SIZE] = {0x00};
982 int len = 0;
983
984 len = strlen(Cmd);
985 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
986 memcpy(filename, Cmd, len);
987
988 FILE *f = fopen(filename, "r");
989 if (!f) {
990 PrintAndLog("couldn't open '%s'", filename);
991 return 0;
992 }
993
994 GraphTraceLen = 0;
995 char line[80];
996 while (fgets(line, sizeof (line), f)) {
997 GraphBuffer[GraphTraceLen] = atoi(line);
998 GraphTraceLen++;
999 }
1000 fclose(f);
1001 PrintAndLog("loaded %d samples", GraphTraceLen);
1002 RepaintGraphWindow();
1003 return 0;
1004 }
1005
1006 int CmdLtrim(const char *Cmd)
1007 {
1008 int ds = atoi(Cmd);
1009
1010 for (int i = ds; i < GraphTraceLen; ++i)
1011 GraphBuffer[i-ds] = GraphBuffer[i];
1012 GraphTraceLen -= ds;
1013
1014 RepaintGraphWindow();
1015 return 0;
1016 }
1017 int CmdRtrim(const char *Cmd)
1018 {
1019 int ds = atoi(Cmd);
1020
1021 GraphTraceLen = ds;
1022
1023 RepaintGraphWindow();
1024 return 0;
1025 }
1026
1027 /*
1028 * Manchester demodulate a bitstream. The bitstream needs to be already in
1029 * the GraphBuffer as 0 and 1 values
1030 *
1031 * Give the clock rate as argument in order to help the sync - the algorithm
1032 * resyncs at each pulse anyway.
1033 *
1034 * Not optimized by any means, this is the 1st time I'm writing this type of
1035 * routine, feel free to improve...
1036 *
1037 * 1st argument: clock rate (as number of samples per clock rate)
1038 * Typical values can be 64, 32, 128...
1039 */
1040 int CmdManchesterDemod(const char *Cmd)
1041 {
1042 int i, j, invert= 0;
1043 int bit;
1044 int clock;
1045 int lastval = 0;
1046 int low = 0;
1047 int high = 0;
1048 int hithigh, hitlow, first;
1049 int lc = 0;
1050 int bitidx = 0;
1051 int bit2idx = 0;
1052 int warnings = 0;
1053
1054 /* check if we're inverting output */
1055 if (*Cmd == 'i')
1056 {
1057 PrintAndLog("Inverting output");
1058 invert = 1;
1059 ++Cmd;
1060 do
1061 ++Cmd;
1062 while(*Cmd == ' '); // in case a 2nd argument was given
1063 }
1064
1065 /* Holds the decoded bitstream: each clock period contains 2 bits */
1066 /* later simplified to 1 bit after manchester decoding. */
1067 /* Add 10 bits to allow for noisy / uncertain traces without aborting */
1068 /* int BitStream[GraphTraceLen*2/clock+10]; */
1069
1070 /* But it does not work if compiling on WIndows: therefore we just allocate a */
1071 /* large array */
1072 uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0x00};
1073
1074 /* Detect high and lows */
1075 DetectHighLowInGraph( &high, &low, TRUE);
1076
1077 /* Get our clock */
1078 clock = GetClock(Cmd, 0);
1079 int tolerance = clock/4;
1080
1081 /* Detect first transition */
1082 /* Lo-Hi (arbitrary) */
1083 /* skip to the first high */
1084 for (i= 0; i < GraphTraceLen; i++)
1085 if (GraphBuffer[i] == high)
1086 break;
1087 /* now look for the first low */
1088 for (; i < GraphTraceLen; i++)
1089 {
1090 if (GraphBuffer[i] == low)
1091 {
1092 lastval = i;
1093 break;
1094 }
1095 }
1096
1097 /* If we're not working with 1/0s, demod based off clock */
1098 if (high != 1)
1099 {
1100 bit = 0; /* We assume the 1st bit is zero, it may not be
1101 * the case: this routine (I think) has an init problem.
1102 * Ed.
1103 */
1104 for (; i < (int)(GraphTraceLen / clock); i++)
1105 {
1106 hithigh = 0;
1107 hitlow = 0;
1108 first = 1;
1109
1110 /* Find out if we hit both high and low peaks */
1111 for (j = 0; j < clock; j++)
1112 {
1113 if (GraphBuffer[(i * clock) + j] == high)
1114 hithigh = 1;
1115 else if (GraphBuffer[(i * clock) + j] == low)
1116 hitlow = 1;
1117
1118 /* it doesn't count if it's the first part of our read
1119 because it's really just trailing from the last sequence */
1120 if (first && (hithigh || hitlow))
1121 hithigh = hitlow = 0;
1122 else
1123 first = 0;
1124
1125 if (hithigh && hitlow)
1126 break;
1127 }
1128
1129 /* If we didn't hit both high and low peaks, we had a bit transition */
1130 if (!hithigh || !hitlow)
1131 bit ^= 1;
1132
1133 BitStream[bit2idx++] = bit ^ invert;
1134 }
1135 }
1136
1137 /* standard 1/0 bitstream */
1138 else
1139 {
1140
1141 /* Then detect duration between 2 successive transitions */
1142 for (bitidx = 1; i < GraphTraceLen; i++)
1143 {
1144 if (GraphBuffer[i-1] != GraphBuffer[i])
1145 {
1146 lc = i-lastval;
1147 lastval = i;
1148
1149 // Error check: if bitidx becomes too large, we do not
1150 // have a Manchester encoded bitstream or the clock is really
1151 // wrong!
1152 if (bitidx > (GraphTraceLen*2/clock+8) ) {
1153 PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
1154 return 0;
1155 }
1156 // Then switch depending on lc length:
1157 // Tolerance is 1/4 of clock rate (arbitrary)
1158 if (abs(lc-clock/2) < tolerance) {
1159 // Short pulse : either "1" or "0"
1160 BitStream[bitidx++]=GraphBuffer[i-1];
1161 } else if (abs(lc-clock) < tolerance) {
1162 // Long pulse: either "11" or "00"
1163 BitStream[bitidx++]=GraphBuffer[i-1];
1164 BitStream[bitidx++]=GraphBuffer[i-1];
1165 } else {
1166 // Error
1167 warnings++;
1168 PrintAndLog("Warning: Manchester decode error for pulse width detection.");
1169 PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)");
1170
1171 if (warnings > 10)
1172 {
1173 PrintAndLog("Error: too many detection errors, aborting.");
1174 return 0;
1175 }
1176 }
1177 }
1178 }
1179
1180 // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream
1181 // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful
1182 // to stop output at the final bitidx2 value, not bitidx
1183
1184 //http://www.proxmark.org/forum/viewtopic.php?id=403
1185 for (i = 1; i < bitidx; i += 2) {
1186 if ((BitStream[i] == 0) && (BitStream[i+1] == 1)) {
1187 BitStream[bit2idx++] = 1 ^ invert;
1188 } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) {
1189 BitStream[bit2idx++] = 0 ^ invert;
1190 } else {
1191 // We cannot end up in this state, this means we are unsynchronized,
1192 // move up 1 bit:
1193 i++;
1194 warnings++;
1195 PrintAndLog("Unsynchronized, resync...");
1196 PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)");
1197
1198 if (warnings > 10)
1199 {
1200 PrintAndLog("Error: too many decode errors, aborting.");
1201 return 0;
1202 }
1203 }
1204 }
1205 }
1206
1207 PrintAndLog("Manchester decoded bitstream");
1208 // Now output the bitstream to the scrollback by line of 16 bits
1209 for (i = 0; i < (bit2idx-16); i+=16) {
1210 PrintAndLog("%i %i %i %i %i %i %i %i %i %i %i %i %i %i %i %i",
1211 BitStream[i],
1212 BitStream[i+1],
1213 BitStream[i+2],
1214 BitStream[i+3],
1215 BitStream[i+4],
1216 BitStream[i+5],
1217 BitStream[i+6],
1218 BitStream[i+7],
1219 BitStream[i+8],
1220 BitStream[i+9],
1221 BitStream[i+10],
1222 BitStream[i+11],
1223 BitStream[i+12],
1224 BitStream[i+13],
1225 BitStream[i+14],
1226 BitStream[i+15]);
1227 }
1228 return bit2idx;
1229 }
1230
1231 /* Modulate our data into manchester */
1232 int CmdManchesterMod(const char *Cmd)
1233 {
1234 int i, j;
1235 int bit, lastbit, wave;
1236 int clock = GetClock(Cmd, 0);
1237
1238 int half = (int)(clock/2);
1239
1240 wave = 0;
1241 lastbit = 1;
1242 for (i = 0; i < (int)(GraphTraceLen / clock); i++)
1243 {
1244 bit = GraphBuffer[i * clock] ^ 1;
1245
1246 for (j = 0; j < half; ++j)
1247 GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave;
1248 for (j = half; j < clock; ++j)
1249 GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave ^ 1;
1250
1251 /* Keep track of how we start our wave and if we changed or not this time */
1252 wave ^= bit ^ lastbit;
1253 lastbit = bit;
1254 }
1255
1256 RepaintGraphWindow();
1257 return 0;
1258 }
1259
1260 int CmdNorm(const char *Cmd)
1261 {
1262 int i;
1263 int max = INT_MIN, min = INT_MAX;
1264
1265 for (i = 10; i < GraphTraceLen; ++i) {
1266 if (GraphBuffer[i] > max)
1267 max = GraphBuffer[i];
1268 if (GraphBuffer[i] < min)
1269 min = GraphBuffer[i];
1270 }
1271
1272 if (max != min) {
1273 for (i = 0; i < GraphTraceLen; ++i) {
1274 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 1000 /
1275 (max - min);
1276 }
1277 }
1278 RepaintGraphWindow();
1279 return 0;
1280 }
1281
1282 int CmdPlot(const char *Cmd)
1283 {
1284 ShowGraphWindow();
1285 return 0;
1286 }
1287
1288 int CmdSave(const char *Cmd)
1289 {
1290 char filename[FILE_PATH_SIZE] = {0x00};
1291 int len = 0;
1292
1293 len = strlen(Cmd);
1294 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1295 memcpy(filename, Cmd, len);
1296
1297
1298 FILE *f = fopen(filename, "w");
1299 if(!f) {
1300 PrintAndLog("couldn't open '%s'", filename);
1301 return 0;
1302 }
1303 int i;
1304 for (i = 0; i < GraphTraceLen; i++) {
1305 fprintf(f, "%d\n", GraphBuffer[i]);
1306 }
1307 fclose(f);
1308 PrintAndLog("saved to '%s'", Cmd);
1309 return 0;
1310 }
1311
1312 int CmdScale(const char *Cmd)
1313 {
1314 CursorScaleFactor = atoi(Cmd);
1315 if (CursorScaleFactor == 0) {
1316 PrintAndLog("bad, can't have zero scale");
1317 CursorScaleFactor = 1;
1318 }
1319 RepaintGraphWindow();
1320 return 0;
1321 }
1322
1323 int CmdThreshold(const char *Cmd)
1324 {
1325 int threshold = atoi(Cmd);
1326
1327 for (int i = 0; i < GraphTraceLen; ++i) {
1328 if (GraphBuffer[i] >= threshold)
1329 GraphBuffer[i] = 1;
1330 else
1331 GraphBuffer[i] = -1;
1332 }
1333 RepaintGraphWindow();
1334 return 0;
1335 }
1336
1337 int CmdDirectionalThreshold(const char *Cmd)
1338 {
1339 int8_t upThres = param_get8(Cmd, 0);
1340 int8_t downThres = param_get8(Cmd, 1);
1341
1342 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1343
1344 int lastValue = GraphBuffer[0];
1345 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1346
1347 for (int i = 1; i < GraphTraceLen; ++i) {
1348 // Apply first threshold to samples heading up
1349 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1350 {
1351 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1352 GraphBuffer[i] = 1;
1353 }
1354 // Apply second threshold to samples heading down
1355 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1356 {
1357 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1358 GraphBuffer[i] = -1;
1359 }
1360 else
1361 {
1362 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1363 GraphBuffer[i] = GraphBuffer[i-1];
1364
1365 }
1366 }
1367 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1368 RepaintGraphWindow();
1369 return 0;
1370 }
1371
1372 int CmdZerocrossings(const char *Cmd)
1373 {
1374 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1375 CmdHpf("");
1376
1377 int sign = 1;
1378 int zc = 0;
1379 int lastZc = 0;
1380
1381 for (int i = 0; i < GraphTraceLen; ++i) {
1382 if (GraphBuffer[i] * sign >= 0) {
1383 // No change in sign, reproduce the previous sample count.
1384 zc++;
1385 GraphBuffer[i] = lastZc;
1386 } else {
1387 // Change in sign, reset the sample count.
1388 sign = -sign;
1389 GraphBuffer[i] = lastZc;
1390 if (sign > 0) {
1391 lastZc = zc;
1392 zc = 0;
1393 }
1394 }
1395 }
1396
1397 RepaintGraphWindow();
1398 return 0;
1399 }
1400
1401 static command_t CommandTable[] =
1402 {
1403 {"help", CmdHelp, 1, "This help"},
1404 {"amp", CmdAmp, 1, "Amplify peaks"},
1405 {"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"},
1406 {"askmandemod", Cmdaskmandemod, 1, "[clock] [invert <0|1>] -- Attempt to demodulate ASK/Manchester tags and output binary"},
1407 {"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert <0|1>] -- Attempt to demodulate ASK tags and output binary"},
1408 {"autocorr", CmdAutoCorr, 1, "<window length> -- Autocorrelation over window"},
1409 {"biphaserawdecode",CmdBiphaseDecodeRaw,1,"[offset] Biphase decode binary stream already in graph buffer (offset = bit to start decode from)"},
1410 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
1411 {"bitstream", CmdBitstream, 1, "[clock rate] -- Convert waveform into a bitstream"},
1412 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1413 {"dec", CmdDec, 1, "Decimate samples"},
1414 {"detectaskclock",CmdDetectClockRate, 1, "Detect ASK clock rate"},
1415 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1416 {"em4xdecode", CmdEm410xDecode, 1, "decode em4x from graph buffer"},
1417 {"fskdemod", CmdFSKdemod, 1, "Demodulate graph window as a HID FSK"},
1418 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate graph window as a HID FSK using raw"},
1419 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate graph window as an IO Prox FSK using raw"},
1420 {"fskrawdemod", CmdFSKrawdemod, 1, "[clock rate] [invert] [rchigh] [rclow] Demodulate graph window from FSK to binary (clock = 50)(invert = 1 or 0)(rchigh = 10)(rclow=8)"},
1421 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1422 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
1423 {"hide", CmdHide, 1, "Hide graph window"},
1424 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1425 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1426 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1427 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
1428 {"mandemod", CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"},
1429 {"manrawdecode", Cmdmandecoderaw, 1, "Manchester decode binary stream already in graph buffer"},
1430 {"manmod", CmdManchesterMod, 1, "[clock rate] -- Manchester modulate a binary stream"},
1431 {"norm", CmdNorm, 1, "Normalize max/min to +/-500"},
1432 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
1433 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window"},
1434 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
1435 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
1436 {"threshold", CmdThreshold, 1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
1437 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1438 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1439 {NULL, NULL, 0, NULL}
1440 };
1441
1442 int CmdData(const char *Cmd)
1443 {
1444 CmdsParse(CommandTable, Cmd);
1445 return 0;
1446 }
1447
1448 int CmdHelp(const char *Cmd)
1449 {
1450 CmdsHelp(CommandTable);
1451 return 0;
1452 }
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