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a553f267 | 1 | //----------------------------------------------------------------------------- |
2 | // Copyright (C) 2010 iZsh <izsh at fail0verflow.com> | |
3 | // | |
4 | // This code is licensed to you under the terms of the GNU GPL, version 2 or, | |
5 | // at your option, any later version. See the LICENSE.txt file for the text of | |
6 | // the license. | |
7 | //----------------------------------------------------------------------------- | |
8 | // Data and Graph commands | |
9 | //----------------------------------------------------------------------------- | |
10 | ||
7fe9b0b7 | 11 | #include <stdio.h> |
12 | #include <stdlib.h> | |
13 | #include <string.h> | |
0e74c023 | 14 | #include <inttypes.h> |
15 | ||
7fe9b0b7 | 16 | #include <limits.h> |
902cb3c0 | 17 | #include "proxmark3.h" |
7fe9b0b7 | 18 | #include "data.h" |
19 | #include "ui.h" | |
20 | #include "graph.h" | |
21 | #include "cmdparser.h" | |
d51b2eda | 22 | #include "util.h" |
7fe9b0b7 | 23 | #include "cmdmain.h" |
24 | #include "cmddata.h" | |
25 | ||
26 | static int CmdHelp(const char *Cmd); | |
27 | ||
28 | int CmdAmp(const char *Cmd) | |
29 | { | |
30 | int i, rising, falling; | |
31 | int max = INT_MIN, min = INT_MAX; | |
32 | ||
33 | for (i = 10; i < GraphTraceLen; ++i) { | |
34 | if (GraphBuffer[i] > max) | |
35 | max = GraphBuffer[i]; | |
36 | if (GraphBuffer[i] < min) | |
37 | min = GraphBuffer[i]; | |
38 | } | |
39 | ||
40 | if (max != min) { | |
41 | rising = falling= 0; | |
42 | for (i = 0; i < GraphTraceLen; ++i) { | |
43 | if (GraphBuffer[i + 1] < GraphBuffer[i]) { | |
44 | if (rising) { | |
45 | GraphBuffer[i] = max; | |
46 | rising = 0; | |
47 | } | |
48 | falling = 1; | |
49 | } | |
50 | if (GraphBuffer[i + 1] > GraphBuffer[i]) { | |
51 | if (falling) { | |
52 | GraphBuffer[i] = min; | |
53 | falling = 0; | |
54 | } | |
55 | rising= 1; | |
56 | } | |
57 | } | |
58 | } | |
59 | RepaintGraphWindow(); | |
60 | return 0; | |
61 | } | |
62 | ||
63 | /* | |
64 | * Generic command to demodulate ASK. | |
65 | * | |
66 | * Argument is convention: positive or negative (High mod means zero | |
67 | * or high mod means one) | |
68 | * | |
69 | * Updates the Graph trace with 0/1 values | |
70 | * | |
71 | * Arguments: | |
72 | * c : 0 or 1 | |
73 | */ | |
2fc2150e | 74 | //this method is dependant on all highs and lows to be the same(or clipped) this creates issues[marshmellow] it also ignores the clock |
7fe9b0b7 | 75 | int Cmdaskdemod(const char *Cmd) |
76 | { | |
77 | int i; | |
78 | int c, high = 0, low = 0; | |
79 | ||
80 | // TODO: complain if we do not give 2 arguments here ! | |
81 | // (AL - this doesn't make sense! we're only using one argument!!!) | |
82 | sscanf(Cmd, "%i", &c); | |
83 | ||
84 | /* Detect high and lows and clock */ | |
b3b70669 | 85 | // (AL - clock???) |
7fe9b0b7 | 86 | for (i = 0; i < GraphTraceLen; ++i) |
87 | { | |
88 | if (GraphBuffer[i] > high) | |
89 | high = GraphBuffer[i]; | |
90 | else if (GraphBuffer[i] < low) | |
91 | low = GraphBuffer[i]; | |
92 | } | |
93 | if (c != 0 && c != 1) { | |
94 | PrintAndLog("Invalid argument: %s", Cmd); | |
95 | return 0; | |
96 | } | |
b3b70669 | 97 | //prime loop |
7fe9b0b7 | 98 | if (GraphBuffer[0] > 0) { |
99 | GraphBuffer[0] = 1-c; | |
100 | } else { | |
101 | GraphBuffer[0] = c; | |
102 | } | |
103 | for (i = 1; i < GraphTraceLen; ++i) { | |
104 | /* Transitions are detected at each peak | |
105 | * Transitions are either: | |
106 | * - we're low: transition if we hit a high | |
107 | * - we're high: transition if we hit a low | |
108 | * (we need to do it this way because some tags keep high or | |
109 | * low for long periods, others just reach the peak and go | |
110 | * down) | |
111 | */ | |
ae2f73c1 | 112 | //[marhsmellow] change == to >= for high and <= for low for fuzz |
113 | if ((GraphBuffer[i] == high) && (GraphBuffer[i - 1] == c)) { | |
7fe9b0b7 | 114 | GraphBuffer[i] = 1 - c; |
ae2f73c1 | 115 | } else if ((GraphBuffer[i] == low) && (GraphBuffer[i - 1] == (1 - c))){ |
7fe9b0b7 | 116 | GraphBuffer[i] = c; |
117 | } else { | |
118 | /* No transition */ | |
119 | GraphBuffer[i] = GraphBuffer[i - 1]; | |
120 | } | |
121 | } | |
122 | RepaintGraphWindow(); | |
123 | return 0; | |
124 | } | |
125 | ||
2fc2150e | 126 | void printBitStream(int BitStream[], uint32_t bitLen){ |
e888ed8e | 127 | uint32_t i = 0; |
128 | if (bitLen<16) return; | |
129 | if (bitLen>512) bitLen=512; | |
130 | for (i = 0; i < (bitLen-16); i+=16) { | |
131 | PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i", | |
132 | BitStream[i], | |
133 | BitStream[i+1], | |
134 | BitStream[i+2], | |
135 | BitStream[i+3], | |
136 | BitStream[i+4], | |
137 | BitStream[i+5], | |
138 | BitStream[i+6], | |
139 | BitStream[i+7], | |
140 | BitStream[i+8], | |
141 | BitStream[i+9], | |
142 | BitStream[i+10], | |
143 | BitStream[i+11], | |
144 | BitStream[i+12], | |
145 | BitStream[i+13], | |
146 | BitStream[i+14], | |
147 | BitStream[i+15]); | |
148 | } | |
149 | return; | |
150 | } | |
2fc2150e | 151 | void printBitStream2(uint8_t BitStream[], uint32_t bitLen){ |
152 | uint32_t i = 0; | |
153 | if (bitLen<16) { | |
154 | PrintAndLog("Too few bits found: %d",bitLen); | |
155 | return; | |
156 | } | |
157 | if (bitLen>512) bitLen=512; | |
158 | for (i = 0; i < (bitLen-16); i+=16) { | |
159 | PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i", | |
160 | BitStream[i], | |
161 | BitStream[i+1], | |
162 | BitStream[i+2], | |
163 | BitStream[i+3], | |
164 | BitStream[i+4], | |
165 | BitStream[i+5], | |
166 | BitStream[i+6], | |
167 | BitStream[i+7], | |
168 | BitStream[i+8], | |
169 | BitStream[i+9], | |
170 | BitStream[i+10], | |
171 | BitStream[i+11], | |
172 | BitStream[i+12], | |
173 | BitStream[i+13], | |
174 | BitStream[i+14], | |
175 | BitStream[i+15]); | |
176 | } | |
177 | return; | |
178 | } | |
179 | ||
180 | //by marshmellow | |
181 | //takes 1s and 0s and searches for EM410x format - output EM ID | |
182 | int Em410xDecode(const char *Cmd) | |
183 | { | |
184 | //no arguments needed - built this way in case we want this to be a direct call from "data " cmds in the future | |
185 | // otherwise could be a void with no arguments | |
186 | //set defaults | |
187 | int high=0, low=0; | |
0e74c023 | 188 | uint64_t lo=0; //hi=0, |
2fc2150e | 189 | |
190 | uint32_t i = 0; | |
191 | uint32_t initLoopMax = 1000; | |
192 | if (initLoopMax>GraphTraceLen) initLoopMax=GraphTraceLen; | |
193 | ||
194 | for (;i < initLoopMax; ++i) //1000 samples should be plenty to find high and low values | |
195 | { | |
196 | if (GraphBuffer[i] > high) | |
197 | high = GraphBuffer[i]; | |
198 | else if (GraphBuffer[i] < low) | |
199 | low = GraphBuffer[i]; | |
200 | } | |
201 | if (((high !=1)||(low !=0))){ //allow only 1s and 0s | |
202 | PrintAndLog("no data found"); | |
203 | return 0; | |
204 | } | |
205 | uint8_t parityTest=0; | |
206 | // 111111111 bit pattern represent start of frame | |
207 | int frame_marker_mask[] = {1,1,1,1,1,1,1,1,1}; | |
208 | uint32_t idx = 0; | |
209 | uint32_t ii=0; | |
210 | uint8_t resetCnt = 0; | |
211 | while( (idx + 64) < GraphTraceLen) { | |
212 | restart: | |
213 | // search for a start of frame marker | |
214 | if ( memcmp(GraphBuffer+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0) | |
215 | { // frame marker found | |
216 | idx+=9;//sizeof(frame_marker_mask); | |
217 | for (i=0; i<10;i++){ | |
218 | for(ii=0; ii<5; ++ii){ | |
219 | parityTest += GraphBuffer[(i*5)+ii+idx]; | |
220 | } | |
221 | if (parityTest== ((parityTest>>1)<<1)){ | |
222 | parityTest=0; | |
223 | for (ii=0; ii<4;++ii){ | |
0e74c023 | 224 | //hi = (hi<<1)|(lo>>31); |
225 | lo=(lo<<1LL)|(GraphBuffer[(i*5)+ii+idx]); | |
2fc2150e | 226 | } |
227 | //PrintAndLog("DEBUG: EM parity passed parity val: %d, i:%d, ii:%d,idx:%d, Buffer: %d%d%d%d%d,lo: %d",parityTest,i,ii,idx,GraphBuffer[idx+ii+(i*5)-5],GraphBuffer[idx+ii+(i*5)-4],GraphBuffer[idx+ii+(i*5)-3],GraphBuffer[idx+ii+(i*5)-2],GraphBuffer[idx+ii+(i*5)-1],lo); | |
228 | }else {//parity failed | |
229 | //PrintAndLog("DEBUG: EM parity failed parity val: %d, i:%d, ii:%d,idx:%d, Buffer: %d%d%d%d%d",parityTest,i,ii,idx,GraphBuffer[idx+ii+(i*5)-5],GraphBuffer[idx+ii+(i*5)-4],GraphBuffer[idx+ii+(i*5)-3],GraphBuffer[idx+ii+(i*5)-2],GraphBuffer[idx+ii+(i*5)-1]); | |
230 | parityTest=0; | |
231 | idx-=8; | |
232 | if (resetCnt>5)return 0; | |
233 | resetCnt++; | |
234 | goto restart;//continue; | |
235 | } | |
236 | } | |
237 | //skip last 5 bit parity test for simplicity. | |
238 | ||
2fc2150e | 239 | //get Unique ID |
0e74c023 | 240 | uint64_t iii=1; |
241 | uint64_t id2lo=0; //id2hi=0, | |
242 | //for (i=0;i<8;i++){ //for uint32 instead of uint64 | |
243 | // id2hi=(id2hi<<1)|((hi & (iii<<(i)))>>i); | |
244 | //} | |
245 | for (ii=5; ii>0;ii--){ | |
2fc2150e | 246 | for (i=0;i<8;i++){ |
0e74c023 | 247 | id2lo=(id2lo<<1LL)|((lo & (iii<<(i+((ii-1)*8))))>>(i+((ii-1)*8))); |
2fc2150e | 248 | } |
249 | } | |
0e74c023 | 250 | //output em id |
251 | PrintAndLog("EM TAG ID : %010llx", lo); | |
252 | PrintAndLog("Unique TAG ID: %010llx", id2lo); //id2hi, | |
253 | PrintAndLog("DEZ 8 : %08lld",lo & 0xFFFFFF); | |
254 | PrintAndLog("DEZ 10 : %010lld",lo & 0xFFFFFF); | |
255 | PrintAndLog("DEZ 5.5 : %05lld.%05lld",(lo>>16LL) & 0xFFFF,(lo & 0xFFFF)); | |
256 | PrintAndLog("DEZ 3.5A : %03lld.%05lld",(lo>>32ll),(lo & 0xFFFF)); | |
257 | PrintAndLog("DEZ 14/IK2 : %014lld",lo); | |
258 | PrintAndLog("DEZ 15/IK3 : %015lld",id2lo); | |
259 | PrintAndLog("Other : %05lld_%03lld_%08lld",(lo&0xFFFF),((lo>>16LL) & 0xFF),(lo & 0xFFFFFF)); | |
2fc2150e | 260 | return 0; |
261 | }else{ | |
262 | idx++; | |
263 | } | |
264 | } | |
265 | return 0; | |
266 | } | |
267 | ||
e888ed8e | 268 | |
269 | //by marshmellow | |
270 | //takes 2 arguments - clock and invert both as integers | |
271 | //prints binary found and saves in graphbuffer for further commands | |
9e6dd4eb | 272 | int Cmdaskmandemod(const char *Cmd) |
e888ed8e | 273 | { |
274 | uint32_t i; | |
275 | int invert=0; //invert default | |
276 | int high = 0, low = 0; | |
0e74c023 | 277 | int clk=DetectClock(0); //clock default |
e888ed8e | 278 | uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0}; |
0e74c023 | 279 | |
280 | sscanf(Cmd, "%i %i", &clk, &invert); | |
281 | if (clk<8) clk =64; | |
282 | if (clk<32) clk=32; | |
e888ed8e | 283 | if (invert != 0 && invert != 1) { |
284 | PrintAndLog("Invalid argument: %s", Cmd); | |
285 | return 0; | |
286 | } | |
287 | uint32_t initLoopMax = 1000; | |
288 | if (initLoopMax>GraphTraceLen) initLoopMax=GraphTraceLen; | |
289 | // Detect high and lows | |
290 | PrintAndLog("Using Clock: %d and invert=%d",clk,invert); | |
291 | for (i = 0; i < initLoopMax; ++i) //1000 samples should be plenty to find high and low values | |
292 | { | |
293 | if (GraphBuffer[i] > high) | |
294 | high = GraphBuffer[i]; | |
295 | else if (GraphBuffer[i] < low) | |
296 | low = GraphBuffer[i]; | |
297 | } | |
298 | if ((high < 30) && ((high !=1)||(low !=-1))){ //throw away static - allow 1 and -1 (in case of threshold command first) | |
299 | PrintAndLog("no data found"); | |
300 | return 0; | |
301 | } | |
302 | //13% fuzz in case highs and lows aren't clipped [marshmellow] | |
303 | high=(int)(0.75*high); | |
304 | low=(int)(0.75*low); | |
305 | ||
2fc2150e | 306 | //PrintAndLog("DEBUG - valid high: %d - valid low: %d",high,low); |
e888ed8e | 307 | int lastBit = 0; //set first clock check |
308 | uint32_t bitnum = 0; //output counter | |
cd48c19c | 309 | uint8_t tol = 0; //clock tolerance adjust - waves will be accepted as within the clock if they fall + or - this value + clock from last valid wave |
310 | if (clk==32)tol=1; //clock tolerance may not be needed anymore currently set to + or - 1 but could be increased for poor waves or removed entirely | |
e888ed8e | 311 | uint32_t iii = 0; |
312 | uint32_t gLen = GraphTraceLen; | |
313 | if (gLen > 500) gLen=500; | |
314 | uint8_t errCnt =0; | |
cd48c19c | 315 | uint32_t bestStart = GraphTraceLen; |
316 | uint32_t bestErrCnt = (GraphTraceLen/1000); | |
2fc2150e | 317 | //PrintAndLog("DEBUG - lastbit - %d",lastBit); |
e888ed8e | 318 | //loop to find first wave that works |
319 | for (iii=0; iii < gLen; ++iii){ | |
320 | if ((GraphBuffer[iii]>=high)||(GraphBuffer[iii]<=low)){ | |
321 | lastBit=iii-clk; | |
322 | //loop through to see if this start location works | |
323 | for (i = iii; i < GraphTraceLen; ++i) { | |
cd48c19c | 324 | if ((GraphBuffer[i] >= high) && ((i-lastBit)>(clk-tol))){ |
e888ed8e | 325 | lastBit+=clk; |
326 | BitStream[bitnum] = invert; | |
327 | bitnum++; | |
cd48c19c | 328 | } else if ((GraphBuffer[i] <= low) && ((i-lastBit)>(clk-tol))){ |
e888ed8e | 329 | //low found and we are expecting a bar |
330 | lastBit+=clk; | |
331 | BitStream[bitnum] = 1-invert; | |
332 | bitnum++; | |
333 | } else { | |
334 | //mid value found or no bar supposed to be here | |
cd48c19c | 335 | if ((i-lastBit)>(clk+tol)){ |
e888ed8e | 336 | //should have hit a high or low based on clock!! |
337 | ||
cd48c19c | 338 | |
e888ed8e | 339 | //debug |
cd48c19c | 340 | //PrintAndLog("DEBUG - no wave in expected area - location: %d, expected: %d-%d, lastBit: %d - resetting search",i,(lastBit+(clk-((int)(tol)))),(lastBit+(clk+((int)(tol)))),lastBit); |
e888ed8e | 341 | if (bitnum > 0){ |
342 | BitStream[bitnum]=77; | |
343 | bitnum++; | |
344 | } | |
cd48c19c | 345 | |
e888ed8e | 346 | |
347 | errCnt++; | |
348 | lastBit+=clk;//skip over until hit too many errors | |
cd48c19c | 349 | if (errCnt>((GraphTraceLen/1000))){ //allow 1 error for every 1000 samples else start over |
e888ed8e | 350 | errCnt=0; |
351 | bitnum=0;//start over | |
352 | break; | |
353 | } | |
354 | } | |
355 | } | |
356 | } | |
cd48c19c | 357 | //we got more than 64 good bits and not all errors |
358 | if ((bitnum > (64+errCnt)) && (errCnt<(GraphTraceLen/1000))) { | |
359 | //possible good read | |
360 | if (errCnt==0) break; //great read - finish | |
0e74c023 | 361 | if (bestStart == iii) break; //if current run == bestErrCnt run (after exhausted testing) then finish |
cd48c19c | 362 | if (errCnt<bestErrCnt){ //set this as new best run |
363 | bestErrCnt=errCnt; | |
364 | bestStart = iii; | |
365 | } | |
366 | } | |
367 | } | |
368 | if (iii>=gLen){ //exhausted test | |
369 | //if there was a ok test go back to that one and re-run the best run (then dump after that run) | |
370 | if (bestErrCnt < (GraphTraceLen/1000)) iii=bestStart; | |
371 | } | |
e888ed8e | 372 | } |
2fc2150e | 373 | if (bitnum>16){ |
9e6dd4eb | 374 | |
2fc2150e | 375 | PrintAndLog("Data start pos:%d, lastBit:%d, stop pos:%d, numBits:%d",iii,lastBit,i,bitnum); |
376 | //move BitStream back to GraphBuffer | |
377 | ClearGraph(0); | |
378 | for (i=0; i < bitnum; ++i){ | |
379 | GraphBuffer[i]=BitStream[i]; | |
380 | } | |
381 | GraphTraceLen=bitnum; | |
382 | RepaintGraphWindow(); | |
383 | //output | |
384 | if (errCnt>0){ | |
cd48c19c | 385 | PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt); |
2fc2150e | 386 | } |
387 | PrintAndLog("ASK decoded bitstream:"); | |
388 | // Now output the bitstream to the scrollback by line of 16 bits | |
389 | printBitStream2(BitStream,bitnum); | |
390 | Em410xDecode(Cmd); | |
391 | } | |
e888ed8e | 392 | return 0; |
393 | } | |
394 | ||
7fe9b0b7 | 395 | int CmdAutoCorr(const char *Cmd) |
396 | { | |
397 | static int CorrelBuffer[MAX_GRAPH_TRACE_LEN]; | |
398 | ||
399 | int window = atoi(Cmd); | |
400 | ||
401 | if (window == 0) { | |
402 | PrintAndLog("needs a window"); | |
403 | return 0; | |
404 | } | |
405 | if (window >= GraphTraceLen) { | |
406 | PrintAndLog("window must be smaller than trace (%d samples)", | |
407 | GraphTraceLen); | |
408 | return 0; | |
409 | } | |
410 | ||
411 | PrintAndLog("performing %d correlations", GraphTraceLen - window); | |
412 | ||
413 | for (int i = 0; i < GraphTraceLen - window; ++i) { | |
414 | int sum = 0; | |
415 | for (int j = 0; j < window; ++j) { | |
416 | sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256; | |
417 | } | |
418 | CorrelBuffer[i] = sum; | |
419 | } | |
420 | GraphTraceLen = GraphTraceLen - window; | |
421 | memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int)); | |
422 | ||
423 | RepaintGraphWindow(); | |
424 | return 0; | |
425 | } | |
426 | ||
427 | int CmdBitsamples(const char *Cmd) | |
428 | { | |
429 | int cnt = 0; | |
90d74dc2 | 430 | uint8_t got[12288]; |
431 | ||
432 | GetFromBigBuf(got,sizeof(got),0); | |
433 | WaitForResponse(CMD_ACK,NULL); | |
7fe9b0b7 | 434 | |
90d74dc2 | 435 | for (int j = 0; j < sizeof(got); j++) { |
7fe9b0b7 | 436 | for (int k = 0; k < 8; k++) { |
90d74dc2 | 437 | if(got[j] & (1 << (7 - k))) { |
7fe9b0b7 | 438 | GraphBuffer[cnt++] = 1; |
439 | } else { | |
440 | GraphBuffer[cnt++] = 0; | |
441 | } | |
442 | } | |
7fe9b0b7 | 443 | } |
444 | GraphTraceLen = cnt; | |
445 | RepaintGraphWindow(); | |
446 | return 0; | |
447 | } | |
448 | ||
449 | /* | |
450 | * Convert to a bitstream | |
451 | */ | |
452 | int CmdBitstream(const char *Cmd) | |
453 | { | |
454 | int i, j; | |
455 | int bit; | |
456 | int gtl; | |
457 | int clock; | |
458 | int low = 0; | |
459 | int high = 0; | |
460 | int hithigh, hitlow, first; | |
461 | ||
462 | /* Detect high and lows and clock */ | |
463 | for (i = 0; i < GraphTraceLen; ++i) | |
464 | { | |
465 | if (GraphBuffer[i] > high) | |
466 | high = GraphBuffer[i]; | |
467 | else if (GraphBuffer[i] < low) | |
468 | low = GraphBuffer[i]; | |
469 | } | |
470 | ||
471 | /* Get our clock */ | |
472 | clock = GetClock(Cmd, high, 1); | |
473 | gtl = ClearGraph(0); | |
474 | ||
475 | bit = 0; | |
476 | for (i = 0; i < (int)(gtl / clock); ++i) | |
477 | { | |
478 | hithigh = 0; | |
479 | hitlow = 0; | |
480 | first = 1; | |
481 | /* Find out if we hit both high and low peaks */ | |
482 | for (j = 0; j < clock; ++j) | |
483 | { | |
484 | if (GraphBuffer[(i * clock) + j] == high) | |
485 | hithigh = 1; | |
486 | else if (GraphBuffer[(i * clock) + j] == low) | |
487 | hitlow = 1; | |
488 | /* it doesn't count if it's the first part of our read | |
489 | because it's really just trailing from the last sequence */ | |
490 | if (first && (hithigh || hitlow)) | |
491 | hithigh = hitlow = 0; | |
492 | else | |
493 | first = 0; | |
494 | ||
495 | if (hithigh && hitlow) | |
496 | break; | |
497 | } | |
498 | ||
499 | /* If we didn't hit both high and low peaks, we had a bit transition */ | |
500 | if (!hithigh || !hitlow) | |
501 | bit ^= 1; | |
502 | ||
503 | AppendGraph(0, clock, bit); | |
504 | // for (j = 0; j < (int)(clock/2); j++) | |
505 | // GraphBuffer[(i * clock) + j] = bit ^ 1; | |
506 | // for (j = (int)(clock/2); j < clock; j++) | |
507 | // GraphBuffer[(i * clock) + j] = bit; | |
508 | } | |
509 | ||
510 | RepaintGraphWindow(); | |
511 | return 0; | |
512 | } | |
513 | ||
514 | int CmdBuffClear(const char *Cmd) | |
515 | { | |
516 | UsbCommand c = {CMD_BUFF_CLEAR}; | |
517 | SendCommand(&c); | |
518 | ClearGraph(true); | |
519 | return 0; | |
520 | } | |
521 | ||
522 | int CmdDec(const char *Cmd) | |
523 | { | |
524 | for (int i = 0; i < (GraphTraceLen / 2); ++i) | |
525 | GraphBuffer[i] = GraphBuffer[i * 2]; | |
526 | GraphTraceLen /= 2; | |
527 | PrintAndLog("decimated by 2"); | |
528 | RepaintGraphWindow(); | |
529 | return 0; | |
530 | } | |
531 | ||
532 | /* Print our clock rate */ | |
533 | int CmdDetectClockRate(const char *Cmd) | |
534 | { | |
535 | int clock = DetectClock(0); | |
536 | PrintAndLog("Auto-detected clock rate: %d", clock); | |
537 | return 0; | |
538 | } | |
539 | ||
2fc2150e | 540 | //by marshmellow |
b3b70669 | 541 | //demod GraphBuffer wave to 0s and 1s for each wave - 0s for short waves 1s for long waves |
542 | size_t fsk_wave_demod(int size) | |
543 | { | |
544 | uint32_t last_transition = 0; | |
545 | uint32_t idx = 1; | |
546 | uint32_t maxVal = 0; | |
547 | // we don't care about actual value, only if it's more or less than a | |
548 | // threshold essentially we capture zero crossings for later analysis | |
549 | for(idx=1; idx<size; idx++){ | |
550 | if(maxVal<GraphBuffer[idx]) maxVal = GraphBuffer[idx]; | |
551 | } | |
552 | // set close to the top of the wave threshold with 13% margin for error | |
553 | // less likely to get a false transition up there. | |
554 | // (but have to be careful not to go too high and miss some short waves) | |
555 | uint32_t threshold_value = (uint32_t)(maxVal*.87); | |
556 | idx=1; | |
557 | // int threshold_value = 100; | |
558 | ||
559 | // sync to first lo-hi transition, and threshold | |
560 | // PrintAndLog("FSK init complete size: %d",size);//debug | |
561 | // Need to threshold first sample | |
562 | if(GraphBuffer[0] < threshold_value) GraphBuffer[0] = 0; | |
563 | else GraphBuffer[0] = 1; | |
564 | size_t numBits = 0; | |
565 | // count cycles between consecutive lo-hi transitions, there should be either 8 (fc/8) | |
566 | // or 10 (fc/10) cycles but in practice due to noise etc we may end up with with anywhere | |
567 | // between 7 to 11 cycles so fuzz it by treat anything <9 as 8 and anything else as 10 | |
568 | for(idx = 1; idx < size; idx++) { | |
569 | // threshold current value | |
570 | if (GraphBuffer[idx] < threshold_value) GraphBuffer[idx] = 0; | |
571 | else GraphBuffer[idx] = 1; | |
572 | // Check for 0->1 transition | |
573 | if (GraphBuffer[idx-1] < GraphBuffer[idx]) { // 0 -> 1 transition | |
574 | if (idx-last_transition<6){ | |
575 | // do nothing with extra garbage (shouldn't be any) noise tolerance? | |
576 | } else if(idx-last_transition < 9) { | |
577 | GraphBuffer[numBits]=1; | |
578 | // Other fsk demods reverse this making the short waves 1 and long waves 0 | |
579 | // this is really backwards... smaller waves will typically be 0 and larger 1 [marshmellow] | |
580 | // but will leave as is and invert when needed later | |
581 | } else{ | |
582 | GraphBuffer[numBits]=0; | |
583 | } | |
584 | last_transition = idx; | |
585 | numBits++; | |
586 | // PrintAndLog("numbits %d",numBits); | |
587 | } | |
588 | } | |
589 | return numBits; //Actually, it returns the number of bytes, but each byte represents a bit: 1 or 0 | |
590 | } | |
591 | uint32_t myround(float f) | |
592 | { | |
593 | if (f >= UINT_MAX) return UINT_MAX; | |
594 | return (uint32_t) (f + (float)0.5); | |
595 | } | |
2fc2150e | 596 | |
597 | //by marshmellow (from holiman's base) | |
b3b70669 | 598 | //translate 11111100000 to 10 |
599 | size_t aggregate_bits(int size, uint8_t rfLen, uint8_t maxConsequtiveBits, uint8_t invert) //,uint8_t l2h_crossing_value | |
600 | { | |
601 | int lastval=GraphBuffer[0]; | |
602 | uint32_t idx=0; | |
603 | size_t numBits=0; | |
604 | uint32_t n=1; | |
605 | uint32_t n2=0; | |
606 | for( idx=1; idx < size; idx++) { | |
607 | ||
608 | if (GraphBuffer[idx]==lastval) { | |
609 | n++; | |
610 | continue; | |
611 | } | |
612 | // if lastval was 1, we have a 1->0 crossing | |
613 | if ( GraphBuffer[idx-1]==1 ) { | |
614 | n=myround((float)(n+1)/((float)(rfLen)/(float)8)); //-2 noise tolerance | |
615 | ||
616 | // n=(n+1) / h2l_crossing_value; | |
617 | //truncating could get us into trouble | |
618 | //now we will try with actual clock (RF/64 or RF/50) variable instead | |
619 | //then devide with float casting then truncate after more acurate division | |
620 | //and round to nearest int | |
621 | //like n = (((float)n)/(float)rfLen/(float)10); | |
622 | } else {// 0->1 crossing | |
623 | n=myround((float)(n+1)/((float)(rfLen-2)/(float)10)); // as int 120/6 = 20 as float 120/(64/10) = 18 (18.75) | |
624 | //n=(n+1) / l2h_crossing_value; | |
625 | } | |
626 | if (n == 0) n = 1; //this should never happen... should we error if it does? | |
627 | ||
628 | if (n < maxConsequtiveBits) // Consecutive //when the consecutive bits are low - the noise tolerance can be high | |
629 | //if it is high then we must be careful how much noise tolerance we allow | |
630 | { | |
631 | if (invert==0){ // do not invert bits | |
632 | for (n2=0; n2<n; n2++){ | |
633 | GraphBuffer[numBits+n2]=GraphBuffer[idx-1]; | |
634 | } | |
635 | //memset(GraphBuffer+numBits, GraphBuffer[idx-1] , n); | |
636 | }else{ // invert bits | |
637 | for (n2=0; n2<n; n2++){ | |
638 | GraphBuffer[numBits+n2]=GraphBuffer[idx-1]^1; | |
639 | } | |
640 | //memset(GraphBuffer+numBits, GraphBuffer[idx-1]^1 , n); | |
641 | } | |
642 | numBits += n; | |
643 | } | |
644 | n=0; | |
645 | lastval=GraphBuffer[idx]; | |
646 | }//end for | |
647 | return numBits; | |
648 | } | |
2fc2150e | 649 | |
650 | //by marshmellow (from holiman's base) | |
b3b70669 | 651 | // full fsk demod from GraphBuffer wave to decoded 1s and 0s (no mandemod) |
652 | size_t fskdemod(uint8_t rfLen, uint8_t invert) | |
653 | { | |
654 | //uint8_t h2l_crossing_value = 6; | |
655 | //uint8_t l2h_crossing_value = 5; | |
656 | ||
657 | // if (rfLen==64) //currently only know settings for RF/64 change from default if option entered | |
658 | // { | |
659 | // h2l_crossing_value=8; //or 8 as 64/8 = 8 | |
660 | // l2h_crossing_value=6; //or 6.4 as 64/10 = 6.4 | |
661 | // } | |
662 | size_t size = GraphTraceLen; | |
663 | // FSK demodulator | |
664 | size = fsk_wave_demod(size); | |
665 | size = aggregate_bits(size,rfLen,192,invert); | |
666 | // size = aggregate_bits(size, h2l_crossing_value, l2h_crossing_value,192, invert); //192=no limit to same values | |
667 | //done messing with GraphBuffer - repaint | |
668 | RepaintGraphWindow(); | |
669 | return size; | |
670 | } | |
671 | uint32_t bytebits_to_byte(int* src, int numbits) | |
672 | { | |
673 | uint32_t num = 0; | |
674 | for(int i = 0 ; i < numbits ; i++) | |
675 | { | |
676 | num = (num << 1) | (*src); | |
677 | src++; | |
678 | } | |
679 | return num; | |
680 | } | |
681 | ||
2fc2150e | 682 | //by marshmellow |
b3b70669 | 683 | //fsk demod and print binary |
e888ed8e | 684 | int CmdFSKrawdemod(const char *Cmd) |
b3b70669 | 685 | { |
686 | //raw fsk demod no manchester decoding no start bit finding just get binary from wave | |
687 | //set defaults | |
688 | uint8_t rfLen = 50; | |
689 | uint8_t invert=0; | |
690 | //set options from parameters entered with the command | |
691 | if (strlen(Cmd)>0 && strlen(Cmd)<=2) { | |
692 | rfLen=param_get8(Cmd, 0); //if rfLen option only is used | |
693 | if (rfLen==1){ | |
694 | invert=1; //if invert option only is used | |
695 | rfLen = 50; | |
696 | } else if(rfLen==0) rfLen=50; | |
697 | } | |
698 | if (strlen(Cmd)>2) { | |
699 | rfLen=param_get8(Cmd, 0); //if both options are used | |
700 | invert=param_get8(Cmd,1); | |
701 | } | |
702 | PrintAndLog("Args invert: %d \nClock:%d",invert,rfLen); | |
703 | ||
704 | size_t size = fskdemod(rfLen,invert); | |
705 | ||
706 | PrintAndLog("FSK decoded bitstream:"); | |
707 | // Now output the bitstream to the scrollback by line of 16 bits | |
708 | if(size > (7*32)+2) size = (7*32)+2; //only output a max of 7 blocks of 32 bits most tags will have full bit stream inside that sample size | |
2fc2150e | 709 | printBitStream(GraphBuffer,size); |
b3b70669 | 710 | |
b3b70669 | 711 | ClearGraph(1); |
712 | return 0; | |
713 | } | |
714 | ||
2fc2150e | 715 | //by marshmellow |
b3b70669 | 716 | int CmdFSKdemodHID(const char *Cmd) |
717 | { | |
718 | //raw fsk demod no manchester decoding no start bit finding just get binary from wave | |
719 | //set defaults | |
720 | uint8_t rfLen = 50; | |
721 | uint8_t invert=0;//param_get8(Cmd, 0); | |
722 | size_t idx=0; | |
723 | uint32_t hi2=0, hi=0, lo=0; | |
724 | ||
725 | //get binary from fsk wave | |
726 | size_t size = fskdemod(rfLen,invert); | |
727 | ||
728 | // final loop, go over previously decoded fsk data and now manchester decode into usable tag ID | |
729 | // 111000 bit pattern represent start of frame, 01 pattern represents a 1 and 10 represents a 0 | |
730 | int frame_marker_mask[] = {1,1,1,0,0,0}; | |
731 | int numshifts = 0; | |
732 | idx = 0; | |
733 | while( idx + 6 < size) { | |
734 | // search for a start of frame marker | |
735 | ||
736 | if ( memcmp(GraphBuffer+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0) | |
737 | { // frame marker found | |
738 | idx+=6;//sizeof(frame_marker_mask); //size of int is >6 | |
739 | while(GraphBuffer[idx] != GraphBuffer[idx+1] && idx < size-2) | |
740 | { | |
741 | // Keep going until next frame marker (or error) | |
742 | // Shift in a bit. Start by shifting high registers | |
743 | hi2 = (hi2<<1)|(hi>>31); | |
744 | hi = (hi<<1)|(lo>>31); | |
745 | //Then, shift in a 0 or one into low | |
746 | if (GraphBuffer[idx] && !GraphBuffer[idx+1]) // 1 0 | |
747 | lo=(lo<<1)|0; | |
748 | else // 0 1 | |
749 | lo=(lo<<1)|1; | |
750 | numshifts++; | |
751 | idx += 2; | |
752 | } | |
753 | ||
754 | //PrintAndLog("Num shifts: %d ", numshifts); | |
755 | // Hopefully, we read a tag and hit upon the next frame marker | |
756 | if(idx + 6 < size) | |
757 | { | |
758 | if ( memcmp(GraphBuffer+(idx), frame_marker_mask, sizeof(frame_marker_mask)) == 0) | |
759 | { | |
760 | if (hi2 != 0){ //extra large HID tags | |
761 | PrintAndLog("TAG ID: %x%08x%08x (%d)", | |
762 | (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); | |
763 | } | |
764 | else { //standard HID tags <38 bits | |
765 | //Dbprintf("TAG ID: %x%08x (%d)",(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF); //old print cmd | |
766 | uint8_t bitlen = 0; | |
767 | uint32_t fc = 0; | |
768 | uint32_t cardnum = 0; | |
769 | if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used | |
770 | uint32_t lo2=0; | |
771 | lo2=(((hi & 15) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit | |
772 | uint8_t idx3 = 1; | |
773 | while(lo2>1){ //find last bit set to 1 (format len bit) | |
774 | lo2=lo2>>1; | |
775 | idx3++; | |
776 | } | |
777 | bitlen =idx3+19; | |
778 | fc =0; | |
779 | cardnum=0; | |
780 | if(bitlen==26){ | |
781 | cardnum = (lo>>1)&0xFFFF; | |
782 | fc = (lo>>17)&0xFF; | |
783 | } | |
784 | if(bitlen==37){ | |
785 | cardnum = (lo>>1)&0x7FFFF; | |
786 | fc = ((hi&0xF)<<12)|(lo>>20); | |
787 | } | |
788 | if(bitlen==34){ | |
789 | cardnum = (lo>>1)&0xFFFF; | |
790 | fc= ((hi&1)<<15)|(lo>>17); | |
791 | } | |
792 | if(bitlen==35){ | |
793 | cardnum = (lo>>1)&0xFFFFF; | |
794 | fc = ((hi&1)<<11)|(lo>>21); | |
795 | } | |
796 | } | |
797 | else { //if bit 38 is not set then 37 bit format is used | |
798 | bitlen= 37; | |
799 | fc =0; | |
800 | cardnum=0; | |
801 | if(bitlen==37){ | |
802 | cardnum = (lo>>1)&0x7FFFF; | |
803 | fc = ((hi&0xF)<<12)|(lo>>20); | |
804 | } | |
805 | } | |
806 | ||
807 | PrintAndLog("TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d", | |
808 | (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF, | |
809 | (unsigned int) bitlen, (unsigned int) fc, (unsigned int) cardnum); | |
810 | ClearGraph(1); | |
811 | return 0; | |
812 | } | |
813 | } | |
814 | } | |
815 | // reset | |
816 | hi2 = hi = lo = 0; | |
817 | numshifts = 0; | |
818 | }else | |
819 | { | |
820 | idx++; | |
821 | } | |
822 | } | |
823 | if (idx + sizeof(frame_marker_mask) >= size){ | |
824 | PrintAndLog("start bits for hid not found"); | |
825 | PrintAndLog("FSK decoded bitstream:"); | |
826 | // Now output the bitstream to the scrollback by line of 16 bits | |
e888ed8e | 827 | printBitStream(GraphBuffer,size); |
2fc2150e | 828 | |
b3b70669 | 829 | } |
830 | ClearGraph(1); | |
831 | return 0; | |
832 | } | |
833 | ||
2fc2150e | 834 | //by marshmellow |
b3b70669 | 835 | int CmdFSKdemodIO(const char *Cmd) |
836 | { | |
837 | //raw fsk demod no manchester decoding no start bit finding just get binary from wave | |
838 | //set defaults | |
839 | uint8_t rfLen = 64; | |
840 | uint8_t invert=1; | |
841 | size_t idx=0; | |
842 | uint8_t testMax=0; | |
843 | //test samples are not just noise | |
844 | if (GraphTraceLen < 64) return 0; | |
845 | for(idx=0;idx<64;idx++){ | |
846 | if (testMax<GraphBuffer[idx]) testMax=GraphBuffer[idx]; | |
847 | } | |
848 | idx=0; | |
849 | //get full binary from fsk wave | |
850 | size_t size = fskdemod(rfLen,invert); | |
851 | ||
852 | //if not just noise | |
853 | //PrintAndLog("testMax %d",testMax); | |
854 | if (testMax>40){ | |
855 | //Index map | |
856 | //0 10 20 30 40 50 60 | |
857 | //| | | | | | | | |
858 | //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23 | |
859 | //----------------------------------------------------------------------------- | |
860 | //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11 | |
861 | // | |
862 | //XSF(version)facility:codeone+codetwo (raw) | |
863 | //Handle the data | |
864 | int mask[] = {0,0,0,0,0,0,0,0,0,1}; | |
865 | for( idx=0; idx < (size - 74); idx++) { | |
866 | if ( memcmp(GraphBuffer + idx, mask, sizeof(mask))==0) { | |
867 | //frame marker found | |
868 | if (GraphBuffer[idx+17]==1 && GraphBuffer[idx+26]==1 && GraphBuffer[idx+35]==1 && GraphBuffer[idx+44]==1 && GraphBuffer[idx+53]==1){ | |
869 | //confirmed proper separator bits found | |
870 | ||
871 | PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx], GraphBuffer[idx+1], GraphBuffer[idx+2], GraphBuffer[idx+3], GraphBuffer[idx+4], GraphBuffer[idx+5], GraphBuffer[idx+6], GraphBuffer[idx+7], GraphBuffer[idx+8]); | |
872 | PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+9], GraphBuffer[idx+10], GraphBuffer[idx+11],GraphBuffer[idx+12],GraphBuffer[idx+13],GraphBuffer[idx+14],GraphBuffer[idx+15],GraphBuffer[idx+16],GraphBuffer[idx+17]); | |
873 | PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+18], GraphBuffer[idx+19], GraphBuffer[idx+20],GraphBuffer[idx+21],GraphBuffer[idx+22],GraphBuffer[idx+23],GraphBuffer[idx+24],GraphBuffer[idx+25],GraphBuffer[idx+26]); | |
874 | PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+27], GraphBuffer[idx+28], GraphBuffer[idx+29],GraphBuffer[idx+30],GraphBuffer[idx+31],GraphBuffer[idx+32],GraphBuffer[idx+33],GraphBuffer[idx+34],GraphBuffer[idx+35]); | |
875 | PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+36], GraphBuffer[idx+37], GraphBuffer[idx+38],GraphBuffer[idx+39],GraphBuffer[idx+40],GraphBuffer[idx+41],GraphBuffer[idx+42],GraphBuffer[idx+43],GraphBuffer[idx+44]); | |
876 | PrintAndLog("%d%d%d%d%d%d%d%d %d",GraphBuffer[idx+45], GraphBuffer[idx+46], GraphBuffer[idx+47],GraphBuffer[idx+48],GraphBuffer[idx+49],GraphBuffer[idx+50],GraphBuffer[idx+51],GraphBuffer[idx+52],GraphBuffer[idx+53]); | |
877 | PrintAndLog("%d%d%d%d%d%d%d%d %d%d",GraphBuffer[idx+54],GraphBuffer[idx+55],GraphBuffer[idx+56],GraphBuffer[idx+57],GraphBuffer[idx+58],GraphBuffer[idx+59],GraphBuffer[idx+60],GraphBuffer[idx+61],GraphBuffer[idx+62],GraphBuffer[idx+63]); | |
878 | ||
879 | uint32_t code = bytebits_to_byte(GraphBuffer+idx,32); | |
880 | uint32_t code2 = bytebits_to_byte(GraphBuffer+idx+32,32); | |
881 | short version = bytebits_to_byte(GraphBuffer+idx+27,8); //14,4 | |
882 | uint8_t facilitycode = bytebits_to_byte(GraphBuffer+idx+19,8) ; | |
883 | uint16_t number = (bytebits_to_byte(GraphBuffer+idx+36,8)<<8)|(bytebits_to_byte(GraphBuffer+idx+45,8)); //36,9 | |
884 | ||
885 | PrintAndLog("XSF(%02d)%02x:%d (%08x%08x)",version,facilitycode,number,code,code2); | |
886 | ClearGraph(1); | |
887 | return 0; | |
888 | } else { | |
889 | PrintAndLog("thought we had a valid tag but did not match format"); | |
890 | } | |
891 | } | |
892 | } | |
893 | if (idx >= (size-74)){ | |
894 | PrintAndLog("start bits for io prox not found"); | |
895 | PrintAndLog("FSK decoded bitstream:"); | |
896 | // Now output the bitstream to the scrollback by line of 16 bits | |
2fc2150e | 897 | printBitStream(GraphBuffer,size); |
b3b70669 | 898 | } |
899 | } | |
900 | ClearGraph(1); | |
901 | return 0; | |
902 | } | |
e888ed8e | 903 | int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating |
7fe9b0b7 | 904 | { |
905 | static const int LowTone[] = { | |
906 | 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, | |
907 | 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, | |
908 | 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, | |
909 | 1, 1, 1, 1, 1, -1, -1, -1, -1, -1, | |
910 | 1, 1, 1, 1, 1, -1, -1, -1, -1, -1 | |
911 | }; | |
912 | static const int HighTone[] = { | |
913 | 1, 1, 1, 1, 1, -1, -1, -1, -1, | |
914 | 1, 1, 1, 1, -1, -1, -1, -1, | |
915 | 1, 1, 1, 1, -1, -1, -1, -1, | |
916 | 1, 1, 1, 1, -1, -1, -1, -1, | |
917 | 1, 1, 1, 1, -1, -1, -1, -1, | |
918 | 1, 1, 1, 1, -1, -1, -1, -1, -1, | |
919 | }; | |
920 | ||
921 | int lowLen = sizeof (LowTone) / sizeof (int); | |
922 | int highLen = sizeof (HighTone) / sizeof (int); | |
b3b70669 | 923 | int convLen = (highLen > lowLen) ? highLen : lowLen; //if highlen > lowLen then highlen else lowlen |
7fe9b0b7 | 924 | uint32_t hi = 0, lo = 0; |
925 | ||
926 | int i, j; | |
927 | int minMark = 0, maxMark = 0; | |
b3b70669 | 928 | |
7fe9b0b7 | 929 | for (i = 0; i < GraphTraceLen - convLen; ++i) { |
930 | int lowSum = 0, highSum = 0; | |
931 | ||
932 | for (j = 0; j < lowLen; ++j) { | |
933 | lowSum += LowTone[j]*GraphBuffer[i+j]; | |
934 | } | |
935 | for (j = 0; j < highLen; ++j) { | |
936 | highSum += HighTone[j] * GraphBuffer[i + j]; | |
937 | } | |
938 | lowSum = abs(100 * lowSum / lowLen); | |
939 | highSum = abs(100 * highSum / highLen); | |
940 | GraphBuffer[i] = (highSum << 16) | lowSum; | |
941 | } | |
942 | ||
943 | for(i = 0; i < GraphTraceLen - convLen - 16; ++i) { | |
944 | int lowTot = 0, highTot = 0; | |
945 | // 10 and 8 are f_s divided by f_l and f_h, rounded | |
946 | for (j = 0; j < 10; ++j) { | |
947 | lowTot += (GraphBuffer[i+j] & 0xffff); | |
948 | } | |
949 | for (j = 0; j < 8; j++) { | |
950 | highTot += (GraphBuffer[i + j] >> 16); | |
951 | } | |
952 | GraphBuffer[i] = lowTot - highTot; | |
953 | if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i]; | |
954 | if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i]; | |
955 | } | |
956 | ||
957 | GraphTraceLen -= (convLen + 16); | |
958 | RepaintGraphWindow(); | |
959 | ||
b3b70669 | 960 | // Find bit-sync (3 lo followed by 3 high) (HID ONLY) |
7fe9b0b7 | 961 | int max = 0, maxPos = 0; |
962 | for (i = 0; i < 6000; ++i) { | |
963 | int dec = 0; | |
964 | for (j = 0; j < 3 * lowLen; ++j) { | |
965 | dec -= GraphBuffer[i + j]; | |
966 | } | |
967 | for (; j < 3 * (lowLen + highLen ); ++j) { | |
968 | dec += GraphBuffer[i + j]; | |
969 | } | |
970 | if (dec > max) { | |
971 | max = dec; | |
972 | maxPos = i; | |
973 | } | |
974 | } | |
975 | ||
976 | // place start of bit sync marker in graph | |
977 | GraphBuffer[maxPos] = maxMark; | |
978 | GraphBuffer[maxPos + 1] = minMark; | |
979 | ||
980 | maxPos += j; | |
981 | ||
982 | // place end of bit sync marker in graph | |
983 | GraphBuffer[maxPos] = maxMark; | |
984 | GraphBuffer[maxPos+1] = minMark; | |
985 | ||
986 | PrintAndLog("actual data bits start at sample %d", maxPos); | |
987 | PrintAndLog("length %d/%d", highLen, lowLen); | |
988 | ||
989 | uint8_t bits[46]; | |
990 | bits[sizeof(bits)-1] = '\0'; | |
991 | ||
992 | // find bit pairs and manchester decode them | |
993 | for (i = 0; i < arraylen(bits) - 1; ++i) { | |
994 | int dec = 0; | |
995 | for (j = 0; j < lowLen; ++j) { | |
996 | dec -= GraphBuffer[maxPos + j]; | |
997 | } | |
998 | for (; j < lowLen + highLen; ++j) { | |
999 | dec += GraphBuffer[maxPos + j]; | |
1000 | } | |
1001 | maxPos += j; | |
1002 | // place inter bit marker in graph | |
1003 | GraphBuffer[maxPos] = maxMark; | |
1004 | GraphBuffer[maxPos + 1] = minMark; | |
1005 | ||
1006 | // hi and lo form a 64 bit pair | |
1007 | hi = (hi << 1) | (lo >> 31); | |
1008 | lo = (lo << 1); | |
1009 | // store decoded bit as binary (in hi/lo) and text (in bits[]) | |
1010 | if(dec < 0) { | |
1011 | bits[i] = '1'; | |
1012 | lo |= 1; | |
1013 | } else { | |
1014 | bits[i] = '0'; | |
1015 | } | |
1016 | } | |
1017 | PrintAndLog("bits: '%s'", bits); | |
1018 | PrintAndLog("hex: %08x %08x", hi, lo); | |
1019 | return 0; | |
1020 | } | |
e888ed8e | 1021 | |
7fe9b0b7 | 1022 | int CmdGrid(const char *Cmd) |
1023 | { | |
1024 | sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY); | |
7ddb9900 | 1025 | PlotGridXdefault= PlotGridX; |
1026 | PlotGridYdefault= PlotGridY; | |
7fe9b0b7 | 1027 | RepaintGraphWindow(); |
1028 | return 0; | |
1029 | } | |
1030 | ||
1031 | int CmdHexsamples(const char *Cmd) | |
1032 | { | |
4961e292 | 1033 | int i, j; |
7fe9b0b7 | 1034 | int requested = 0; |
1035 | int offset = 0; | |
4961e292 | 1036 | char string_buf[25]; |
1037 | char* string_ptr = string_buf; | |
90d74dc2 | 1038 | uint8_t got[40000]; |
4961e292 | 1039 | |
1040 | sscanf(Cmd, "%i %i", &requested, &offset); | |
90d74dc2 | 1041 | |
4961e292 | 1042 | /* if no args send something */ |
1043 | if (requested == 0) { | |
90d74dc2 | 1044 | requested = 8; |
1045 | } | |
90d74dc2 | 1046 | if (offset + requested > sizeof(got)) { |
1047 | PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > 40000"); | |
4961e292 | 1048 | return 0; |
1049 | } | |
90d74dc2 | 1050 | |
4961e292 | 1051 | GetFromBigBuf(got,requested,offset); |
90d74dc2 | 1052 | WaitForResponse(CMD_ACK,NULL); |
1053 | ||
4961e292 | 1054 | i = 0; |
1055 | for (j = 0; j < requested; j++) { | |
1056 | i++; | |
1057 | string_ptr += sprintf(string_ptr, "%02x ", got[j]); | |
1058 | if (i == 8) { | |
1059 | *(string_ptr - 1) = '\0'; // remove the trailing space | |
1060 | PrintAndLog("%s", string_buf); | |
1061 | string_buf[0] = '\0'; | |
1062 | string_ptr = string_buf; | |
1063 | i = 0; | |
1064 | } | |
1065 | if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes | |
1066 | *(string_ptr - 1) = '\0'; | |
1067 | PrintAndLog("%s", string_buf); | |
1068 | string_buf[0] = '\0'; | |
1069 | } | |
7fe9b0b7 | 1070 | } |
1071 | return 0; | |
1072 | } | |
1073 | ||
7fe9b0b7 | 1074 | int CmdHide(const char *Cmd) |
1075 | { | |
1076 | HideGraphWindow(); | |
1077 | return 0; | |
1078 | } | |
1079 | ||
1080 | int CmdHpf(const char *Cmd) | |
1081 | { | |
1082 | int i; | |
1083 | int accum = 0; | |
1084 | ||
1085 | for (i = 10; i < GraphTraceLen; ++i) | |
1086 | accum += GraphBuffer[i]; | |
1087 | accum /= (GraphTraceLen - 10); | |
1088 | for (i = 0; i < GraphTraceLen; ++i) | |
1089 | GraphBuffer[i] -= accum; | |
1090 | ||
1091 | RepaintGraphWindow(); | |
1092 | return 0; | |
1093 | } | |
1094 | ||
8d183c53 | 1095 | int CmdSamples(const char *Cmd) |
7fe9b0b7 | 1096 | { |
1097 | int cnt = 0; | |
1098 | int n; | |
90d74dc2 | 1099 | uint8_t got[40000]; |
1100 | ||
7fe9b0b7 | 1101 | n = strtol(Cmd, NULL, 0); |
b3b70669 | 1102 | if (n == 0) n = 6000; |
90d74dc2 | 1103 | if (n > sizeof(got)) n = sizeof(got); |
a2847518 | 1104 | |
7fe9b0b7 | 1105 | PrintAndLog("Reading %d samples\n", n); |
90d74dc2 | 1106 | GetFromBigBuf(got,n,0); |
a2847518 | 1107 | WaitForResponse(CMD_ACK,NULL); |
90d74dc2 | 1108 | for (int j = 0; j < n; j++) { |
a2847518 | 1109 | GraphBuffer[cnt++] = ((int)got[j]) - 128; |
7fe9b0b7 | 1110 | } |
a2847518 | 1111 | |
7fe9b0b7 | 1112 | PrintAndLog("Done!\n"); |
90d74dc2 | 1113 | GraphTraceLen = n; |
7fe9b0b7 | 1114 | RepaintGraphWindow(); |
1115 | return 0; | |
1116 | } | |
1117 | ||
d6a120a2 MHS |
1118 | int CmdTuneSamples(const char *Cmd) |
1119 | { | |
1120 | int cnt = 0; | |
1121 | int n = 255; | |
1122 | uint8_t got[255]; | |
1123 | ||
1124 | PrintAndLog("Reading %d samples\n", n); | |
1125 | GetFromBigBuf(got,n,7256); // armsrc/apps.h: #define FREE_BUFFER_OFFSET 7256 | |
1126 | WaitForResponse(CMD_ACK,NULL); | |
1127 | for (int j = 0; j < n; j++) { | |
1128 | GraphBuffer[cnt++] = ((int)got[j]) - 128; | |
1129 | } | |
1130 | ||
1131 | PrintAndLog("Done! Divisor 89 is 134khz, 95 is 125khz.\n"); | |
1132 | PrintAndLog("\n"); | |
1133 | GraphTraceLen = n; | |
1134 | RepaintGraphWindow(); | |
1135 | return 0; | |
1136 | } | |
1137 | ||
7fe9b0b7 | 1138 | int CmdLoad(const char *Cmd) |
1139 | { | |
c6f1fb9d | 1140 | FILE *f = fopen(Cmd, "r"); |
7fe9b0b7 | 1141 | if (!f) { |
c6f1fb9d | 1142 | PrintAndLog("couldn't open '%s'", Cmd); |
7fe9b0b7 | 1143 | return 0; |
1144 | } | |
1145 | ||
1146 | GraphTraceLen = 0; | |
1147 | char line[80]; | |
1148 | while (fgets(line, sizeof (line), f)) { | |
1149 | GraphBuffer[GraphTraceLen] = atoi(line); | |
1150 | GraphTraceLen++; | |
1151 | } | |
1152 | fclose(f); | |
1153 | PrintAndLog("loaded %d samples", GraphTraceLen); | |
1154 | RepaintGraphWindow(); | |
1155 | return 0; | |
1156 | } | |
1157 | ||
1158 | int CmdLtrim(const char *Cmd) | |
1159 | { | |
1160 | int ds = atoi(Cmd); | |
1161 | ||
1162 | for (int i = ds; i < GraphTraceLen; ++i) | |
1163 | GraphBuffer[i-ds] = GraphBuffer[i]; | |
1164 | GraphTraceLen -= ds; | |
1165 | ||
1166 | RepaintGraphWindow(); | |
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * Manchester demodulate a bitstream. The bitstream needs to be already in | |
1172 | * the GraphBuffer as 0 and 1 values | |
1173 | * | |
1174 | * Give the clock rate as argument in order to help the sync - the algorithm | |
1175 | * resyncs at each pulse anyway. | |
1176 | * | |
1177 | * Not optimized by any means, this is the 1st time I'm writing this type of | |
1178 | * routine, feel free to improve... | |
1179 | * | |
1180 | * 1st argument: clock rate (as number of samples per clock rate) | |
1181 | * Typical values can be 64, 32, 128... | |
1182 | */ | |
1183 | int CmdManchesterDemod(const char *Cmd) | |
1184 | { | |
1185 | int i, j, invert= 0; | |
1186 | int bit; | |
1187 | int clock; | |
fddf220a | 1188 | int lastval = 0; |
7fe9b0b7 | 1189 | int low = 0; |
1190 | int high = 0; | |
1191 | int hithigh, hitlow, first; | |
1192 | int lc = 0; | |
1193 | int bitidx = 0; | |
1194 | int bit2idx = 0; | |
1195 | int warnings = 0; | |
1196 | ||
1197 | /* check if we're inverting output */ | |
c6f1fb9d | 1198 | if (*Cmd == 'i') |
7fe9b0b7 | 1199 | { |
1200 | PrintAndLog("Inverting output"); | |
1201 | invert = 1; | |
fffad860 | 1202 | ++Cmd; |
7fe9b0b7 | 1203 | do |
1204 | ++Cmd; | |
1205 | while(*Cmd == ' '); // in case a 2nd argument was given | |
1206 | } | |
1207 | ||
1208 | /* Holds the decoded bitstream: each clock period contains 2 bits */ | |
1209 | /* later simplified to 1 bit after manchester decoding. */ | |
1210 | /* Add 10 bits to allow for noisy / uncertain traces without aborting */ | |
1211 | /* int BitStream[GraphTraceLen*2/clock+10]; */ | |
1212 | ||
1213 | /* But it does not work if compiling on WIndows: therefore we just allocate a */ | |
1214 | /* large array */ | |
90e278d3 | 1215 | uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0}; |
7fe9b0b7 | 1216 | |
1217 | /* Detect high and lows */ | |
1218 | for (i = 0; i < GraphTraceLen; i++) | |
1219 | { | |
1220 | if (GraphBuffer[i] > high) | |
1221 | high = GraphBuffer[i]; | |
1222 | else if (GraphBuffer[i] < low) | |
1223 | low = GraphBuffer[i]; | |
1224 | } | |
1225 | ||
1226 | /* Get our clock */ | |
1227 | clock = GetClock(Cmd, high, 1); | |
1228 | ||
1229 | int tolerance = clock/4; | |
1230 | ||
1231 | /* Detect first transition */ | |
1232 | /* Lo-Hi (arbitrary) */ | |
1233 | /* skip to the first high */ | |
1234 | for (i= 0; i < GraphTraceLen; i++) | |
1235 | if (GraphBuffer[i] == high) | |
1236 | break; | |
1237 | /* now look for the first low */ | |
1238 | for (; i < GraphTraceLen; i++) | |
1239 | { | |
1240 | if (GraphBuffer[i] == low) | |
1241 | { | |
1242 | lastval = i; | |
1243 | break; | |
1244 | } | |
1245 | } | |
1246 | ||
1247 | /* If we're not working with 1/0s, demod based off clock */ | |
1248 | if (high != 1) | |
1249 | { | |
1250 | bit = 0; /* We assume the 1st bit is zero, it may not be | |
1251 | * the case: this routine (I think) has an init problem. | |
1252 | * Ed. | |
1253 | */ | |
1254 | for (; i < (int)(GraphTraceLen / clock); i++) | |
1255 | { | |
1256 | hithigh = 0; | |
1257 | hitlow = 0; | |
1258 | first = 1; | |
1259 | ||
1260 | /* Find out if we hit both high and low peaks */ | |
1261 | for (j = 0; j < clock; j++) | |
1262 | { | |
1263 | if (GraphBuffer[(i * clock) + j] == high) | |
1264 | hithigh = 1; | |
1265 | else if (GraphBuffer[(i * clock) + j] == low) | |
1266 | hitlow = 1; | |
1267 | ||
1268 | /* it doesn't count if it's the first part of our read | |
1269 | because it's really just trailing from the last sequence */ | |
1270 | if (first && (hithigh || hitlow)) | |
1271 | hithigh = hitlow = 0; | |
1272 | else | |
1273 | first = 0; | |
1274 | ||
1275 | if (hithigh && hitlow) | |
1276 | break; | |
1277 | } | |
1278 | ||
1279 | /* If we didn't hit both high and low peaks, we had a bit transition */ | |
1280 | if (!hithigh || !hitlow) | |
1281 | bit ^= 1; | |
1282 | ||
1283 | BitStream[bit2idx++] = bit ^ invert; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | /* standard 1/0 bitstream */ | |
1288 | else | |
1289 | { | |
1290 | ||
1291 | /* Then detect duration between 2 successive transitions */ | |
1292 | for (bitidx = 1; i < GraphTraceLen; i++) | |
1293 | { | |
1294 | if (GraphBuffer[i-1] != GraphBuffer[i]) | |
1295 | { | |
b3b70669 | 1296 | lc = i-lastval; |
1297 | lastval = i; | |
1298 | ||
1299 | // Error check: if bitidx becomes too large, we do not | |
1300 | // have a Manchester encoded bitstream or the clock is really | |
1301 | // wrong! | |
1302 | if (bitidx > (GraphTraceLen*2/clock+8) ) { | |
1303 | PrintAndLog("Error: the clock you gave is probably wrong, aborting."); | |
1304 | return 0; | |
1305 | } | |
1306 | // Then switch depending on lc length: | |
1307 | // Tolerance is 1/4 of clock rate (arbitrary) | |
1308 | if (abs(lc-clock/2) < tolerance) { | |
1309 | // Short pulse : either "1" or "0" | |
1310 | BitStream[bitidx++]=GraphBuffer[i-1]; | |
1311 | } else if (abs(lc-clock) < tolerance) { | |
1312 | // Long pulse: either "11" or "00" | |
1313 | BitStream[bitidx++]=GraphBuffer[i-1]; | |
1314 | BitStream[bitidx++]=GraphBuffer[i-1]; | |
1315 | } else { | |
7fe9b0b7 | 1316 | // Error |
1317 | warnings++; | |
b3b70669 | 1318 | PrintAndLog("Warning: Manchester decode error for pulse width detection."); |
1319 | PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)"); | |
7fe9b0b7 | 1320 | |
1321 | if (warnings > 10) | |
1322 | { | |
1323 | PrintAndLog("Error: too many detection errors, aborting."); | |
1324 | return 0; | |
1325 | } | |
1326 | } | |
1327 | } | |
1328 | } | |
1329 | ||
1330 | // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream | |
1331 | // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful | |
1332 | // to stop output at the final bitidx2 value, not bitidx | |
1333 | for (i = 0; i < bitidx; i += 2) { | |
1334 | if ((BitStream[i] == 0) && (BitStream[i+1] == 1)) { | |
1335 | BitStream[bit2idx++] = 1 ^ invert; | |
b3b70669 | 1336 | } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) { |
1337 | BitStream[bit2idx++] = 0 ^ invert; | |
1338 | } else { | |
1339 | // We cannot end up in this state, this means we are unsynchronized, | |
1340 | // move up 1 bit: | |
1341 | i++; | |
7fe9b0b7 | 1342 | warnings++; |
b3b70669 | 1343 | PrintAndLog("Unsynchronized, resync..."); |
1344 | PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)"); | |
7fe9b0b7 | 1345 | |
1346 | if (warnings > 10) | |
1347 | { | |
1348 | PrintAndLog("Error: too many decode errors, aborting."); | |
1349 | return 0; | |
1350 | } | |
1351 | } | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | PrintAndLog("Manchester decoded bitstream"); | |
1356 | // Now output the bitstream to the scrollback by line of 16 bits | |
1357 | for (i = 0; i < (bit2idx-16); i+=16) { | |
1358 | PrintAndLog("%i %i %i %i %i %i %i %i %i %i %i %i %i %i %i %i", | |
1359 | BitStream[i], | |
1360 | BitStream[i+1], | |
1361 | BitStream[i+2], | |
1362 | BitStream[i+3], | |
1363 | BitStream[i+4], | |
1364 | BitStream[i+5], | |
1365 | BitStream[i+6], | |
1366 | BitStream[i+7], | |
1367 | BitStream[i+8], | |
1368 | BitStream[i+9], | |
1369 | BitStream[i+10], | |
1370 | BitStream[i+11], | |
1371 | BitStream[i+12], | |
1372 | BitStream[i+13], | |
1373 | BitStream[i+14], | |
1374 | BitStream[i+15]); | |
1375 | } | |
1376 | return 0; | |
1377 | } | |
1378 | ||
1379 | /* Modulate our data into manchester */ | |
1380 | int CmdManchesterMod(const char *Cmd) | |
1381 | { | |
1382 | int i, j; | |
1383 | int clock; | |
1384 | int bit, lastbit, wave; | |
1385 | ||
1386 | /* Get our clock */ | |
1387 | clock = GetClock(Cmd, 0, 1); | |
1388 | ||
1389 | wave = 0; | |
1390 | lastbit = 1; | |
1391 | for (i = 0; i < (int)(GraphTraceLen / clock); i++) | |
1392 | { | |
1393 | bit = GraphBuffer[i * clock] ^ 1; | |
1394 | ||
1395 | for (j = 0; j < (int)(clock/2); j++) | |
1396 | GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave; | |
1397 | for (j = (int)(clock/2); j < clock; j++) | |
1398 | GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave ^ 1; | |
1399 | ||
1400 | /* Keep track of how we start our wave and if we changed or not this time */ | |
1401 | wave ^= bit ^ lastbit; | |
1402 | lastbit = bit; | |
1403 | } | |
1404 | ||
1405 | RepaintGraphWindow(); | |
1406 | return 0; | |
1407 | } | |
1408 | ||
1409 | int CmdNorm(const char *Cmd) | |
1410 | { | |
1411 | int i; | |
1412 | int max = INT_MIN, min = INT_MAX; | |
1413 | ||
1414 | for (i = 10; i < GraphTraceLen; ++i) { | |
1415 | if (GraphBuffer[i] > max) | |
1416 | max = GraphBuffer[i]; | |
1417 | if (GraphBuffer[i] < min) | |
1418 | min = GraphBuffer[i]; | |
1419 | } | |
1420 | ||
1421 | if (max != min) { | |
1422 | for (i = 0; i < GraphTraceLen; ++i) { | |
1423 | GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 1000 / | |
1424 | (max - min); | |
1425 | } | |
1426 | } | |
1427 | RepaintGraphWindow(); | |
1428 | return 0; | |
1429 | } | |
1430 | ||
1431 | int CmdPlot(const char *Cmd) | |
1432 | { | |
1433 | ShowGraphWindow(); | |
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | int CmdSave(const char *Cmd) | |
1438 | { | |
1439 | FILE *f = fopen(Cmd, "w"); | |
1440 | if(!f) { | |
1441 | PrintAndLog("couldn't open '%s'", Cmd); | |
1442 | return 0; | |
1443 | } | |
1444 | int i; | |
1445 | for (i = 0; i < GraphTraceLen; i++) { | |
1446 | fprintf(f, "%d\n", GraphBuffer[i]); | |
1447 | } | |
1448 | fclose(f); | |
1449 | PrintAndLog("saved to '%s'", Cmd); | |
1450 | return 0; | |
1451 | } | |
1452 | ||
1453 | int CmdScale(const char *Cmd) | |
1454 | { | |
1455 | CursorScaleFactor = atoi(Cmd); | |
1456 | if (CursorScaleFactor == 0) { | |
1457 | PrintAndLog("bad, can't have zero scale"); | |
1458 | CursorScaleFactor = 1; | |
1459 | } | |
1460 | RepaintGraphWindow(); | |
1461 | return 0; | |
1462 | } | |
1463 | ||
1464 | int CmdThreshold(const char *Cmd) | |
1465 | { | |
1466 | int threshold = atoi(Cmd); | |
1467 | ||
1468 | for (int i = 0; i < GraphTraceLen; ++i) { | |
1469 | if (GraphBuffer[i] >= threshold) | |
1470 | GraphBuffer[i] = 1; | |
1471 | else | |
7bb9d33e | 1472 | GraphBuffer[i] = -1; |
7fe9b0b7 | 1473 | } |
1474 | RepaintGraphWindow(); | |
1475 | return 0; | |
1476 | } | |
1477 | ||
d51b2eda MHS |
1478 | int CmdDirectionalThreshold(const char *Cmd) |
1479 | { | |
1480 | int8_t upThres = param_get8(Cmd, 0); | |
1481 | int8_t downThres = param_get8(Cmd, 1); | |
1482 | ||
1483 | printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres); | |
1484 | ||
1485 | int lastValue = GraphBuffer[0]; | |
1486 | GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in. | |
1487 | ||
1488 | for (int i = 1; i < GraphTraceLen; ++i) { | |
1489 | // Apply first threshold to samples heading up | |
1490 | if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue) | |
1491 | { | |
1492 | lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. | |
1493 | GraphBuffer[i] = 1; | |
1494 | } | |
1495 | // Apply second threshold to samples heading down | |
1496 | else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue) | |
1497 | { | |
1498 | lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. | |
1499 | GraphBuffer[i] = -1; | |
1500 | } | |
1501 | else | |
1502 | { | |
1503 | lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it. | |
1504 | GraphBuffer[i] = GraphBuffer[i-1]; | |
1505 | ||
1506 | } | |
1507 | } | |
1508 | GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample. | |
1509 | RepaintGraphWindow(); | |
1510 | return 0; | |
1511 | } | |
1512 | ||
7fe9b0b7 | 1513 | int CmdZerocrossings(const char *Cmd) |
1514 | { | |
1515 | // Zero-crossings aren't meaningful unless the signal is zero-mean. | |
1516 | CmdHpf(""); | |
1517 | ||
1518 | int sign = 1; | |
1519 | int zc = 0; | |
1520 | int lastZc = 0; | |
1521 | ||
1522 | for (int i = 0; i < GraphTraceLen; ++i) { | |
1523 | if (GraphBuffer[i] * sign >= 0) { | |
1524 | // No change in sign, reproduce the previous sample count. | |
1525 | zc++; | |
1526 | GraphBuffer[i] = lastZc; | |
1527 | } else { | |
1528 | // Change in sign, reset the sample count. | |
1529 | sign = -sign; | |
1530 | GraphBuffer[i] = lastZc; | |
1531 | if (sign > 0) { | |
1532 | lastZc = zc; | |
1533 | zc = 0; | |
1534 | } | |
1535 | } | |
1536 | } | |
1537 | ||
1538 | RepaintGraphWindow(); | |
1539 | return 0; | |
1540 | } | |
1541 | ||
1542 | static command_t CommandTable[] = | |
1543 | { | |
1544 | {"help", CmdHelp, 1, "This help"}, | |
1545 | {"amp", CmdAmp, 1, "Amplify peaks"}, | |
57c69556 | 1546 | {"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"}, |
9e6dd4eb | 1547 | {"askmandemod", Cmdaskmandemod, 1, "[clock] [invert<0 or 1>] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional[clock will try Auto-detect])"}, |
7fe9b0b7 | 1548 | {"autocorr", CmdAutoCorr, 1, "<window length> -- Autocorrelation over window"}, |
1549 | {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"}, | |
1550 | {"bitstream", CmdBitstream, 1, "[clock rate] -- Convert waveform into a bitstream"}, | |
1551 | {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"}, | |
1552 | {"dec", CmdDec, 1, "Decimate samples"}, | |
1553 | {"detectclock", CmdDetectClockRate, 1, "Detect clock rate"}, | |
e888ed8e | 1554 | {"fskdemod", CmdFSKdemod, 1, "Demodulate graph window as a HID FSK"}, |
1555 | {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate graph window as a HID FSK using raw"}, | |
1556 | {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate graph window as an IO Prox FSK using raw"}, | |
1557 | {"fskrawdemod", CmdFSKrawdemod, 1, "[clock rate] [invert] Demodulate graph window from FSK to binary (clock = 64 or 50)(invert = 1 or 0)"}, | |
7fe9b0b7 | 1558 | {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"}, |
90d74dc2 | 1559 | {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"}, |
7fe9b0b7 | 1560 | {"hide", CmdHide, 1, "Hide graph window"}, |
1561 | {"hpf", CmdHpf, 1, "Remove DC offset from trace"}, | |
7fe9b0b7 | 1562 | {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"}, |
1563 | {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"}, | |
1564 | {"mandemod", CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"}, | |
1565 | {"manmod", CmdManchesterMod, 1, "[clock rate] -- Manchester modulate a binary stream"}, | |
1566 | {"norm", CmdNorm, 1, "Normalize max/min to +/-500"}, | |
7ddb9900 | 1567 | {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"}, |
90d74dc2 | 1568 | {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window"}, |
d6a120a2 | 1569 | {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"}, |
7fe9b0b7 | 1570 | {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"}, |
1571 | {"scale", CmdScale, 1, "<int> -- Set cursor display scale"}, | |
dbf444a1 | 1572 | {"threshold", CmdThreshold, 1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"}, |
7fe9b0b7 | 1573 | {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"}, |
d51b2eda | 1574 | {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."}, |
7fe9b0b7 | 1575 | {NULL, NULL, 0, NULL} |
1576 | }; | |
1577 | ||
1578 | int CmdData(const char *Cmd) | |
1579 | { | |
1580 | CmdsParse(CommandTable, Cmd); | |
1581 | return 0; | |
1582 | } | |
1583 | ||
1584 | int CmdHelp(const char *Cmd) | |
1585 | { | |
1586 | CmdsHelp(CommandTable); | |
1587 | return 0; | |
1588 | } |