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PSK demod adjustment
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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>
14#include <limits.h>
902cb3c0 15#include "proxmark3.h"
7fe9b0b7 16#include "data.h"
17#include "ui.h"
18#include "graph.h"
19#include "cmdparser.h"
d51b2eda 20#include "util.h"
7fe9b0b7 21#include "cmdmain.h"
22#include "cmddata.h"
7db5f1ca 23#include "lfdemod.h"
31abe49f
MHS
24#include "usb_cmd.h"
25
4118b74d 26uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
ec75f5c1 27uint8_t g_debugMode;
4118b74d 28int DemodBufferLen;
7fe9b0b7 29static int CmdHelp(const char *Cmd);
30
4118b74d 31//set the demod buffer with given array of binary (one bit per byte)
32//by marshmellow
ec75f5c1 33void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
4118b74d 34{
ec75f5c1 35 size_t i = 0;
36 for (; i < size; i++){
37 DemodBuffer[i]=buff[startIdx++];
ba1a299c 38 }
39 DemodBufferLen=size;
40 return;
4118b74d 41}
42
ec75f5c1 43int CmdSetDebugMode(const char *Cmd)
44{
45 int demod=0;
46 sscanf(Cmd, "%i", &demod);
47 g_debugMode=(uint8_t)demod;
48 return 1;
49}
50
4118b74d 51//by marshmellow
abd6112f 52void printDemodBuff(void)
4118b74d 53{
ba1a299c 54 uint32_t i = 0;
55 int bitLen = DemodBufferLen;
56 if (bitLen<16) {
57 PrintAndLog("no bits found in demod buffer");
58 return;
59 }
60 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
33c7e2f3 61
0c5998c0 62 // ensure equally divided by 16
b4fb11ba 63 bitLen &= 0xfff0;
33c7e2f3 64
ba1a299c 65 for (i = 0; i <= (bitLen-16); i+=16) {
66 PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
67 DemodBuffer[i],
68 DemodBuffer[i+1],
69 DemodBuffer[i+2],
70 DemodBuffer[i+3],
71 DemodBuffer[i+4],
72 DemodBuffer[i+5],
73 DemodBuffer[i+6],
74 DemodBuffer[i+7],
75 DemodBuffer[i+8],
76 DemodBuffer[i+9],
77 DemodBuffer[i+10],
78 DemodBuffer[i+11],
79 DemodBuffer[i+12],
80 DemodBuffer[i+13],
81 DemodBuffer[i+14],
82 DemodBuffer[i+15]);
83 }
84 return;
4118b74d 85}
86
87
7fe9b0b7 88int CmdAmp(const char *Cmd)
89{
90 int i, rising, falling;
91 int max = INT_MIN, min = INT_MAX;
92
93 for (i = 10; i < GraphTraceLen; ++i) {
94 if (GraphBuffer[i] > max)
95 max = GraphBuffer[i];
96 if (GraphBuffer[i] < min)
97 min = GraphBuffer[i];
98 }
99
100 if (max != min) {
101 rising = falling= 0;
102 for (i = 0; i < GraphTraceLen; ++i) {
103 if (GraphBuffer[i + 1] < GraphBuffer[i]) {
104 if (rising) {
105 GraphBuffer[i] = max;
106 rising = 0;
107 }
108 falling = 1;
109 }
110 if (GraphBuffer[i + 1] > GraphBuffer[i]) {
111 if (falling) {
112 GraphBuffer[i] = min;
113 falling = 0;
114 }
115 rising= 1;
116 }
117 }
118 }
119 RepaintGraphWindow();
120 return 0;
121}
122
123/*
124 * Generic command to demodulate ASK.
125 *
126 * Argument is convention: positive or negative (High mod means zero
127 * or high mod means one)
128 *
129 * Updates the Graph trace with 0/1 values
130 *
131 * Arguments:
132 * c : 0 or 1
133 */
2fc2150e 134 //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 135int Cmdaskdemod(const char *Cmd)
136{
137 int i;
138 int c, high = 0, low = 0;
ba1a299c 139
7fe9b0b7 140 // TODO: complain if we do not give 2 arguments here !
141 // (AL - this doesn't make sense! we're only using one argument!!!)
142 sscanf(Cmd, "%i", &c);
ba1a299c 143
7fe9b0b7 144 /* Detect high and lows and clock */
ba1a299c 145 // (AL - clock???)
7fe9b0b7 146 for (i = 0; i < GraphTraceLen; ++i)
147 {
148 if (GraphBuffer[i] > high)
149 high = GraphBuffer[i];
150 else if (GraphBuffer[i] < low)
151 low = GraphBuffer[i];
152 }
eb191de6 153 high=abs(high*.75);
154 low=abs(low*.75);
7fe9b0b7 155 if (c != 0 && c != 1) {
156 PrintAndLog("Invalid argument: %s", Cmd);
157 return 0;
158 }
b3b70669 159 //prime loop
7fe9b0b7 160 if (GraphBuffer[0] > 0) {
161 GraphBuffer[0] = 1-c;
162 } else {
163 GraphBuffer[0] = c;
164 }
165 for (i = 1; i < GraphTraceLen; ++i) {
166 /* Transitions are detected at each peak
167 * Transitions are either:
168 * - we're low: transition if we hit a high
169 * - we're high: transition if we hit a low
170 * (we need to do it this way because some tags keep high or
171 * low for long periods, others just reach the peak and go
172 * down)
173 */
ae2f73c1 174 //[marhsmellow] change == to >= for high and <= for low for fuzz
175 if ((GraphBuffer[i] == high) && (GraphBuffer[i - 1] == c)) {
7fe9b0b7 176 GraphBuffer[i] = 1 - c;
ae2f73c1 177 } else if ((GraphBuffer[i] == low) && (GraphBuffer[i - 1] == (1 - c))){
7fe9b0b7 178 GraphBuffer[i] = c;
179 } else {
180 /* No transition */
181 GraphBuffer[i] = GraphBuffer[i - 1];
182 }
183 }
184 RepaintGraphWindow();
185 return 0;
186}
187
d5a72d2f 188//by marshmellow
189void printBitStream(uint8_t BitStream[], uint32_t bitLen)
190{
b4fb11ba 191 uint32_t i = 0;
192 if (bitLen<16) {
193 PrintAndLog("Too few bits found: %d",bitLen);
194 return;
195 }
196 if (bitLen>512) bitLen=512;
0c5998c0 197
b4fb11ba 198 // ensure equally divided by 16
199 bitLen &= 0xfff0;
0c5998c0 200
b4fb11ba 201
202 for (i = 0; i <= (bitLen-16); i+=16) {
203 PrintAndLog("%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i%i",
204 BitStream[i],
205 BitStream[i+1],
206 BitStream[i+2],
207 BitStream[i+3],
208 BitStream[i+4],
209 BitStream[i+5],
210 BitStream[i+6],
211 BitStream[i+7],
212 BitStream[i+8],
213 BitStream[i+9],
214 BitStream[i+10],
215 BitStream[i+11],
216 BitStream[i+12],
217 BitStream[i+13],
218 BitStream[i+14],
219 BitStream[i+15]);
220 }
ba1a299c 221 return;
2fc2150e 222}
d5a72d2f 223//by marshmellow
abd6112f 224//print 64 bit EM410x ID in multiple formats
eb191de6 225void printEM410x(uint64_t id)
2fc2150e 226{
eb191de6 227 if (id !=0){
b4fb11ba 228 uint64_t iii=1;
229 uint64_t id2lo=0;
230 uint32_t ii=0;
231 uint32_t i=0;
232 for (ii=5; ii>0;ii--){
233 for (i=0;i<8;i++){
234 id2lo=(id2lo<<1LL) | ((id & (iii << (i+((ii-1)*8)))) >> (i+((ii-1)*8)));
2fc2150e 235 }
b4fb11ba 236 }
237 //output em id
238 PrintAndLog("EM TAG ID : %010llx", id);
239 PrintAndLog("Unique TAG ID: %010llx", id2lo);
240 PrintAndLog("DEZ 8 : %08lld",id & 0xFFFFFF);
241 PrintAndLog("DEZ 10 : %010lld",id & 0xFFFFFF);
242 PrintAndLog("DEZ 5.5 : %05lld.%05lld",(id>>16LL) & 0xFFFF,(id & 0xFFFF));
243 PrintAndLog("DEZ 3.5A : %03lld.%05lld",(id>>32ll),(id & 0xFFFF));
244 PrintAndLog("DEZ 14/IK2 : %014lld",id);
245 PrintAndLog("DEZ 15/IK3 : %015lld",id2lo);
246 PrintAndLog("Other : %05lld_%03lld_%08lld",(id&0xFFFF),((id>>16LL) & 0xFF),(id & 0xFFFFFF));
247 }
248 return;
eb191de6 249}
250
e888ed8e 251//by marshmellow
e770c648 252//takes 3 arguments - clock, invert and maxErr as integers
253//attempts to demodulate ask while decoding manchester
254//prints binary found and saves in graphbuffer for further commands
255int CmdAskEM410xDemod(const char *Cmd)
256{
257 int invert=0;
258 int clk=0;
259 int maxErr=100;
260 char cmdp = param_getchar(Cmd, 0);
6de43508 261 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
e770c648 262 PrintAndLog("Usage: data askem410xdemod [clock] <0|1> [maxError]");
263 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
264 PrintAndLog(" <invert>, 1 for invert output");
265 PrintAndLog(" [set maximum allowed errors], default = 100.");
266 PrintAndLog("");
267 PrintAndLog(" sample: data askem410xdemod = demod an EM410x Tag ID from GraphBuffer");
268 PrintAndLog(" : data askem410xdemod 32 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32");
269 PrintAndLog(" : data askem410xdemod 32 1 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/32 and inverting data");
270 PrintAndLog(" : data askem410xdemod 1 = demod an EM410x Tag ID from GraphBuffer while inverting data");
271 PrintAndLog(" : data askem410xdemod 64 1 0 = demod an EM410x Tag ID from GraphBuffer using a clock of RF/64 and inverting data and allowing 0 demod errors");
272
273 return 0;
274 }
275
276
277 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
278 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
279 if (invert != 0 && invert != 1) {
280 PrintAndLog("Invalid argument: %s", Cmd);
281 return 0;
282 }
283 size_t BitLen = getFromGraphBuf(BitStream);
284
285 if (g_debugMode==1) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
286 if (BitLen==0) return 0;
287 int errCnt=0;
288 errCnt = askmandemod(BitStream, &BitLen, &clk, &invert, maxErr);
289 if (errCnt<0||BitLen<16){ //if fatal error (or -1)
290 if (g_debugMode==1) PrintAndLog("no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
291 return 0;
292 }
293 PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,BitLen);
294
295 //output
296 if (errCnt>0){
297 PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
298 }
299 //PrintAndLog("ASK/Manchester decoded bitstream:");
300 // Now output the bitstream to the scrollback by line of 16 bits
301 setDemodBuf(BitStream,BitLen,0);
302 //printDemodBuff();
303 uint64_t lo =0;
304 size_t idx=0;
305 lo = Em410xDecode(BitStream, &BitLen, &idx);
306 if (lo>0){
307 //set GraphBuffer for clone or sim command
308 setDemodBuf(BitStream, BitLen, idx);
309 if (g_debugMode){
310 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
311 printDemodBuff();
312 }
313 PrintAndLog("EM410x pattern found: ");
abd6112f 314 if (BitLen > 64) PrintAndLog("\nWarning! Length not what is expected - Length: %d bits\n",BitLen);
e770c648 315 printEM410x(lo);
316 return 1;
317 }
318 return 0;
319}
320
4ac906d1 321int ASKmanDemod(const char *Cmd, bool verbose, bool emSearch)
e888ed8e 322{
ec75f5c1 323 int invert=0;
b4fb11ba 324 int clk=0;
e770c648 325 int maxErr=100;
4ac906d1 326
eb191de6 327 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
b4fb11ba 328 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
e888ed8e 329 if (invert != 0 && invert != 1) {
330 PrintAndLog("Invalid argument: %s", Cmd);
331 return 0;
6de43508 332 }
333 if (clk==1){
334 invert=1;
335 clk=0;
e888ed8e 336 }
b4fb11ba 337 size_t BitLen = getFromGraphBuf(BitStream);
ec75f5c1 338 if (g_debugMode==1) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
e770c648 339 if (BitLen==0) return 0;
eb191de6 340 int errCnt=0;
e770c648 341 errCnt = askmandemod(BitStream, &BitLen, &clk, &invert, maxErr);
b4fb11ba 342 if (errCnt<0||BitLen<16){ //if fatal error (or -1)
343 if (g_debugMode==1) PrintAndLog("no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
e888ed8e 344 return 0;
b4fb11ba 345 }
4ac906d1 346 if (verbose) PrintAndLog("\nUsing Clock: %d - Invert: %d - Bits Found: %d",clk,invert,BitLen);
ba1a299c 347
d5a72d2f 348 //output
eb191de6 349 if (errCnt>0){
4ac906d1 350 if (verbose) PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
e888ed8e 351 }
4ac906d1 352 if (verbose) PrintAndLog("ASK/Manchester decoded bitstream:");
eb191de6 353 // Now output the bitstream to the scrollback by line of 16 bits
b4fb11ba 354 setDemodBuf(BitStream,BitLen,0);
4ac906d1 355 if (verbose) printDemodBuff();
eb191de6 356 uint64_t lo =0;
ec75f5c1 357 size_t idx=0;
4ac906d1 358 if (emSearch){
359 lo = Em410xDecode(BitStream, &BitLen, &idx);
360 if (lo>0){
361 //set GraphBuffer for clone or sim command
362 setDemodBuf(BitStream, BitLen, idx);
363 if (g_debugMode){
364 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
365 printDemodBuff();
366 }
367 if (verbose) PrintAndLog("EM410x pattern found: ");
368 if (verbose) printEM410x(lo);
369 return 1;
ec75f5c1 370 }
d5a72d2f 371 }
e770c648 372 return 1;
eb191de6 373}
374
4ac906d1 375//by marshmellow
376//takes 3 arguments - clock, invert, maxErr as integers
377//attempts to demodulate ask while decoding manchester
378//prints binary found and saves in graphbuffer for further commands
379int Cmdaskmandemod(const char *Cmd)
380{
381 char cmdp = param_getchar(Cmd, 0);
382 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
383 PrintAndLog("Usage: data rawdemod am [clock] <0|1> [maxError]");
384 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
385 PrintAndLog(" <invert>, 1 for invert output");
386 PrintAndLog(" [set maximum allowed errors], default = 100.");
387 PrintAndLog("");
388 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
389 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
390 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
391 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
392 PrintAndLog(" : data rawdemod am 64 1 0 = demod an ask/manchester tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
393 return 0;
394 }
395 return ASKmanDemod(Cmd, TRUE, TRUE);
396}
397
eb191de6 398//by marshmellow
d5a72d2f 399//manchester decode
eb191de6 400//stricktly take 10 and 01 and convert to 0 and 1
401int Cmdmandecoderaw(const char *Cmd)
402{
403 int i =0;
404 int errCnt=0;
b4fb11ba 405 size_t size=0;
6de43508 406 size_t maxErr = 20;
e770c648 407 char cmdp = param_getchar(Cmd, 0);
408 if (strlen(Cmd) > 1 || cmdp == 'h' || cmdp == 'H') {
409 PrintAndLog("Usage: data manrawdecode");
410 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
411 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
412 PrintAndLog("");
413 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
414 return 0;
415 }
416 if (DemodBufferLen==0) return 0;
eb191de6 417 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
418 int high=0,low=0;
b4fb11ba 419 for (;i<DemodBufferLen;++i){
420 if (DemodBuffer[i]>high) high=DemodBuffer[i];
421 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
422 BitStream[i]=DemodBuffer[i];
eb191de6 423 }
424 if (high>1 || low <0 ){
425 PrintAndLog("Error: please raw demod the wave first then mancheseter raw decode");
426 return 0;
427 }
b4fb11ba 428 size=i;
429 errCnt=manrawdecode(BitStream, &size);
6de43508 430 if (errCnt>=maxErr){
2df8c079 431 PrintAndLog("Too many errors: %d",errCnt);
432 return 0;
433 }
eb191de6 434 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
b4fb11ba 435 printBitStream(BitStream, size);
eb191de6 436 if (errCnt==0){
b4fb11ba 437 uint64_t id = 0;
ec75f5c1 438 size_t idx=0;
b4fb11ba 439 id = Em410xDecode(BitStream, &size, &idx);
440 if (id>0){
ec75f5c1 441 //need to adjust to set bitstream back to manchester encoded data
442 //setDemodBuf(BitStream, size, idx);
443
444 printEM410x(id);
445 }
eb191de6 446 }
d5a72d2f 447 return 1;
448}
449
450//by marshmellow
451//biphase decode
452//take 01 or 10 = 0 and 11 or 00 = 1
1e090a61 453//takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
454// and "invert" default = 0 if 1 it will invert output
ba1a299c 455// since it is not like manchester and doesn't have an incorrect bit pattern we
d5a72d2f 456// cannot determine if our decode is correct or if it should be shifted by one bit
457// the argument offset allows us to manually shift if the output is incorrect
458// (better would be to demod and decode at the same time so we can distinguish large
459// width waves vs small width waves to help the decode positioning) or askbiphdemod
460int CmdBiphaseDecodeRaw(const char *Cmd)
461{
b4fb11ba 462 int i = 0;
463 int errCnt=0;
ba1a299c 464 size_t size=0;
b4fb11ba 465 int offset=0;
466 int invert=0;
467 int high=0, low=0;
468 char cmdp = param_getchar(Cmd, 0);
469 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
470 PrintAndLog("Usage: data biphaserawdecode [offset] <invert>");
471 PrintAndLog(" Converts 10 or 01 to 0 and 11 or 00 to 1");
472 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
473 PrintAndLog("");
474 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
475 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
476 PrintAndLog("");
477 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
478 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
479 return 0;
480 }
1e090a61 481 sscanf(Cmd, "%i %i", &offset, &invert);
b4fb11ba 482 if (DemodBufferLen==0) return 0;
483 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
484 //get graphbuffer & high and low
ba1a299c 485 for (;i<DemodBufferLen;++i){
486 if(DemodBuffer[i]>high)high=DemodBuffer[i];
487 else if(DemodBuffer[i]<low)low=DemodBuffer[i];
488 BitStream[i]=DemodBuffer[i];
b4fb11ba 489 }
490 if (high>1 || low <0){
491 PrintAndLog("Error: please raw demod the wave first then decode");
492 return 0;
493 }
ba1a299c 494 size=i;
1e090a61 495 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
b4fb11ba 496 if (errCnt>=20){
497 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
498 return 0;
499 }
500 PrintAndLog("Biphase Decoded using offset: %d - # errors:%d - data:",offset,errCnt);
ba1a299c 501 printBitStream(BitStream, size);
b4fb11ba 502 PrintAndLog("\nif bitstream does not look right try offset=1");
503 return 1;
eb191de6 504}
505
506//by marshmellow
6de43508 507//takes 4 arguments - clock, invert, maxErr as integers and amplify as char
eb191de6 508//attempts to demodulate ask only
509//prints binary found and saves in graphbuffer for further commands
4ac906d1 510int ASKrawDemod(const char *Cmd, bool verbose)
eb191de6 511{
b4fb11ba 512 int invert=0;
513 int clk=0;
e770c648 514 int maxErr=100;
6de43508 515 uint8_t askAmp = 0;
516 char amp = param_getchar(Cmd, 0);
eb191de6 517 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
b4fb11ba 518 sscanf(Cmd, "%i %i %i %c", &clk, &invert, &maxErr, &amp);
eb191de6 519 if (invert != 0 && invert != 1) {
4ac906d1 520 if (verbose) PrintAndLog("Invalid argument: %s", Cmd);
eb191de6 521 return 0;
522 }
6de43508 523 if (clk==1){
524 invert=1;
525 clk=0;
526 }
527 if (amp == 'a' || amp == 'A') askAmp=1;
b4fb11ba 528 size_t BitLen = getFromGraphBuf(BitStream);
e770c648 529 if (BitLen==0) return 0;
eb191de6 530 int errCnt=0;
b4fb11ba 531 errCnt = askrawdemod(BitStream, &BitLen, &clk, &invert, maxErr, askAmp);
532 if (errCnt==-1||BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
4ac906d1 533 if (verbose) PrintAndLog("no data found");
534 if (g_debugMode==1 && verbose) PrintAndLog("errCnt: %d, BitLen: %d, clk: %d, invert: %d", errCnt, BitLen, clk, invert);
eb191de6 535 return 0;
b4fb11ba 536 }
4ac906d1 537 if (verbose) PrintAndLog("Using Clock: %d - invert: %d - Bits Found: %d", clk, invert, BitLen);
ec75f5c1 538
539 //move BitStream back to DemodBuffer
b4fb11ba 540 setDemodBuf(BitStream,BitLen,0);
ba1a299c 541
b4fb11ba 542 //output
4ac906d1 543 if (errCnt>0 && verbose){
e770c648 544 PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d", errCnt);
eb191de6 545 }
4ac906d1 546 if (verbose){
547 PrintAndLog("ASK demoded bitstream:");
548 // Now output the bitstream to the scrollback by line of 16 bits
549 printBitStream(BitStream,BitLen);
550 }
f822a063 551 return 1;
e888ed8e 552}
553
4ac906d1 554//by marshmellow - see ASKrawDemod
555int Cmdaskrawdemod(const char *Cmd)
556{
557 char cmdp = param_getchar(Cmd, 0);
558 if (strlen(Cmd) > 12 || cmdp == 'h' || cmdp == 'H') {
559 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [amplify]");
560 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
561 PrintAndLog(" <invert>, 1 to invert output");
562 PrintAndLog(" [set maximum allowed errors], default = 100");
563 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
564 PrintAndLog("");
565 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
566 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
567 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
568 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
569 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
570 PrintAndLog(" : data rawdemod ar 64 1 0 = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
571 PrintAndLog(" : data rawdemod ar 64 1 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
572 return 0;
573 }
574 return ASKrawDemod(Cmd, TRUE);
575}
576
7fe9b0b7 577int CmdAutoCorr(const char *Cmd)
578{
579 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
580
581 int window = atoi(Cmd);
582
583 if (window == 0) {
584 PrintAndLog("needs a window");
585 return 0;
586 }
587 if (window >= GraphTraceLen) {
588 PrintAndLog("window must be smaller than trace (%d samples)",
589 GraphTraceLen);
590 return 0;
591 }
592
593 PrintAndLog("performing %d correlations", GraphTraceLen - window);
594
595 for (int i = 0; i < GraphTraceLen - window; ++i) {
596 int sum = 0;
597 for (int j = 0; j < window; ++j) {
598 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
599 }
600 CorrelBuffer[i] = sum;
601 }
602 GraphTraceLen = GraphTraceLen - window;
603 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
604
605 RepaintGraphWindow();
606 return 0;
607}
608
609int CmdBitsamples(const char *Cmd)
610{
611 int cnt = 0;
90d74dc2 612 uint8_t got[12288];
952a8bb5 613
90d74dc2 614 GetFromBigBuf(got,sizeof(got),0);
615 WaitForResponse(CMD_ACK,NULL);
7fe9b0b7 616
90d74dc2 617 for (int j = 0; j < sizeof(got); j++) {
7fe9b0b7 618 for (int k = 0; k < 8; k++) {
90d74dc2 619 if(got[j] & (1 << (7 - k))) {
7fe9b0b7 620 GraphBuffer[cnt++] = 1;
621 } else {
622 GraphBuffer[cnt++] = 0;
623 }
624 }
7fe9b0b7 625 }
626 GraphTraceLen = cnt;
627 RepaintGraphWindow();
628 return 0;
629}
630
631/*
632 * Convert to a bitstream
633 */
634int CmdBitstream(const char *Cmd)
635{
636 int i, j;
637 int bit;
638 int gtl;
639 int clock;
640 int low = 0;
641 int high = 0;
642 int hithigh, hitlow, first;
643
644 /* Detect high and lows and clock */
645 for (i = 0; i < GraphTraceLen; ++i)
646 {
647 if (GraphBuffer[i] > high)
648 high = GraphBuffer[i];
649 else if (GraphBuffer[i] < low)
650 low = GraphBuffer[i];
651 }
652
653 /* Get our clock */
f3bf15e4 654 clock = GetAskClock(Cmd, high, 1);
7fe9b0b7 655 gtl = ClearGraph(0);
656
657 bit = 0;
658 for (i = 0; i < (int)(gtl / clock); ++i)
659 {
660 hithigh = 0;
661 hitlow = 0;
662 first = 1;
663 /* Find out if we hit both high and low peaks */
664 for (j = 0; j < clock; ++j)
665 {
666 if (GraphBuffer[(i * clock) + j] == high)
667 hithigh = 1;
668 else if (GraphBuffer[(i * clock) + j] == low)
669 hitlow = 1;
670 /* it doesn't count if it's the first part of our read
671 because it's really just trailing from the last sequence */
672 if (first && (hithigh || hitlow))
673 hithigh = hitlow = 0;
674 else
675 first = 0;
676
677 if (hithigh && hitlow)
678 break;
679 }
680
681 /* If we didn't hit both high and low peaks, we had a bit transition */
682 if (!hithigh || !hitlow)
683 bit ^= 1;
684
685 AppendGraph(0, clock, bit);
7fe9b0b7 686 }
ba1a299c 687
7fe9b0b7 688 RepaintGraphWindow();
689 return 0;
690}
691
692int CmdBuffClear(const char *Cmd)
693{
694 UsbCommand c = {CMD_BUFF_CLEAR};
695 SendCommand(&c);
696 ClearGraph(true);
697 return 0;
698}
699
700int CmdDec(const char *Cmd)
701{
702 for (int i = 0; i < (GraphTraceLen / 2); ++i)
703 GraphBuffer[i] = GraphBuffer[i * 2];
704 GraphTraceLen /= 2;
705 PrintAndLog("decimated by 2");
706 RepaintGraphWindow();
707 return 0;
708}
698b649e
MHS
709/**
710 * Undecimate - I'd call it 'interpolate', but we'll save that
711 * name until someone does an actual interpolation command, not just
712 * blindly repeating samples
713 * @param Cmd
714 * @return
715 */
716int CmdUndec(const char *Cmd)
717{
c856ceae
MHS
718 if(param_getchar(Cmd, 0) == 'h')
719 {
720 PrintAndLog("Usage: data undec [factor]");
721 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
722 PrintAndLog("Options: ");
723 PrintAndLog(" h This help");
724 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
725 PrintAndLog("Example: 'data undec 3'");
726 return 0;
727 }
728
729 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
698b649e
MHS
730 //We have memory, don't we?
731 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
c856ceae
MHS
732 uint32_t g_index = 0 ,s_index = 0;
733 while(g_index < GraphTraceLen && s_index < MAX_GRAPH_TRACE_LEN)
698b649e 734 {
c856ceae
MHS
735 int count = 0;
736 for(count = 0; count < factor && s_index+count < MAX_GRAPH_TRACE_LEN; count ++)
737 swap[s_index+count] = GraphBuffer[g_index];
738 s_index+=count;
698b649e 739 }
698b649e 740
c856ceae
MHS
741 memcpy(GraphBuffer,swap, s_index * sizeof(int));
742 GraphTraceLen = s_index;
743 RepaintGraphWindow();
698b649e
MHS
744 return 0;
745}
7fe9b0b7 746
ec75f5c1 747//by marshmellow
748//shift graph zero up or down based on input + or -
749int CmdGraphShiftZero(const char *Cmd)
750{
751
752 int shift=0;
753 //set options from parameters entered with the command
754 sscanf(Cmd, "%i", &shift);
755 int shiftedVal=0;
756 for(int i = 0; i<GraphTraceLen; i++){
757 shiftedVal=GraphBuffer[i]+shift;
758 if (shiftedVal>127)
759 shiftedVal=127;
760 else if (shiftedVal<-127)
761 shiftedVal=-127;
762 GraphBuffer[i]= shiftedVal;
763 }
764 CmdNorm("");
765 return 0;
766}
767
6de43508 768//by marshmellow
769//use large jumps in read samples to identify edges of waves and then amplify that wave to max
770//similar to dirtheshold, threshold, and askdemod commands
771//takes a threshold length which is the measured length between two samples then determines an edge
772int CmdAskEdgeDetect(const char *Cmd)
773{
774 int thresLen = 25;
775 sscanf(Cmd, "%i", &thresLen);
776 int shift = 127;
777 int shiftedVal=0;
778 for(int i = 1; i<GraphTraceLen; i++){
779 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
780 shift=127;
781 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
782 shift=-127;
783
784 shiftedVal=GraphBuffer[i]+shift;
785
786 if (shiftedVal>127)
787 shiftedVal=127;
788 else if (shiftedVal<-127)
789 shiftedVal=-127;
790 GraphBuffer[i-1] = shiftedVal;
791 }
792 RepaintGraphWindow();
793 //CmdNorm("");
794 return 0;
795}
796
7fe9b0b7 797/* Print our clock rate */
ba1a299c 798// uses data from graphbuffer
f3bf15e4 799// adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
7fe9b0b7 800int CmdDetectClockRate(const char *Cmd)
801{
f3bf15e4 802 char cmdp = param_getchar(Cmd, 0);
803 if (strlen(Cmd) > 3 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
804 PrintAndLog("Usage: data detectclock [modulation]");
805 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
806 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
807 PrintAndLog("");
808 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
809 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
810 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
811 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
812 }
813 int ans=0;
814 if (cmdp == 'a'){
815 ans = GetAskClock("", true, false);
816 } else if (cmdp == 'f'){
817 ans = GetFskClock("", true, false);
818 } else if (cmdp == 'n'){
819 ans = GetNrzClock("", true, false);
820 } else if (cmdp == 'p'){
821 ans = GetPskClock("", true, false);
822 } else {
823 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
824 }
825 return ans;
7fe9b0b7 826}
66707a3b 827
2fc2150e 828//by marshmellow
eb191de6 829//fsk raw demod and print binary
6de43508 830//takes 4 arguments - Clock, invert, fchigh, fclow
831//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
4ac906d1 832int FSKrawDemod(const char *Cmd, bool verbose)
b3b70669 833{
eb191de6 834 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
b3b70669 835 //set defaults
03e6bb4a 836 int rfLen = 0;
4ac906d1 837 int invert = 0;
838 int fchigh = 0;
839 int fclow = 0;
840
b3b70669 841 //set options from parameters entered with the command
b4fb11ba 842 sscanf(Cmd, "%i %i %i %i", &rfLen, &invert, &fchigh, &fclow);
ba1a299c 843
b3b70669 844 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
b3b70669 845 if (rfLen==1){
846 invert=1; //if invert option only is used
03e6bb4a 847 rfLen = 0;
848 }
b4fb11ba 849 }
03e6bb4a 850
eb191de6 851 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
b4fb11ba 852 size_t BitLen = getFromGraphBuf(BitStream);
e770c648 853 if (BitLen==0) return 0;
03e6bb4a 854 //get field clock lengths
855 uint16_t fcs=0;
e770c648 856 uint8_t dummy=0;
03e6bb4a 857 if (fchigh==0 || fclow == 0){
4ac906d1 858 fcs = countFC(BitStream, BitLen, &dummy);
03e6bb4a 859 if (fcs==0){
860 fchigh=10;
861 fclow=8;
862 }else{
863 fchigh = (fcs >> 8) & 0xFF;
864 fclow = fcs & 0xFF;
865 }
866 }
867 //get bit clock length
868 if (rfLen==0){
869 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
870 if (rfLen == 0) rfLen = 50;
871 }
4ac906d1 872 if (verbose) PrintAndLog("Args invert: %d - Clock:%d - fchigh:%d - fclow: %d",invert,rfLen,fchigh, fclow);
b4fb11ba 873 int size = fskdemod(BitStream,BitLen,(uint8_t)rfLen,(uint8_t)invert,(uint8_t)fchigh,(uint8_t)fclow);
d5a72d2f 874 if (size>0){
b4fb11ba 875 setDemodBuf(BitStream,size,0);
ba1a299c 876
d5a72d2f 877 // Now output the bitstream to the scrollback by line of 16 bits
878 if(size > (8*32)+2) size = (8*32)+2; //only output a max of 8 blocks of 32 bits most tags will have full bit stream inside that sample size
4ac906d1 879 if (verbose) {
880 PrintAndLog("FSK decoded bitstream:");
881 printBitStream(BitStream,size);
882 }
3f41e73c 883
e770c648 884 return 1;
d5a72d2f 885 } else{
4ac906d1 886 if (verbose) PrintAndLog("no FSK data found");
eb191de6 887 }
b3b70669 888 return 0;
889}
890
4ac906d1 891//by marshmellow
892//fsk raw demod and print binary
893//takes 4 arguments - Clock, invert, fchigh, fclow
894//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
895int CmdFSKrawdemod(const char *Cmd)
896{
897 char cmdp = param_getchar(Cmd, 0);
898 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
899 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
900 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
901 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
902 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
903 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
904 PrintAndLog("");
905 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
906 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
907 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
908 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
909 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
910 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
911 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
912 return 0;
913 }
914 return FSKrawDemod(Cmd, TRUE);
915}
916
eb191de6 917//by marshmellow (based on existing demod + holiman's refactor)
918//HID Prox demod - FSK RF/50 with preamble of 00011101 (then manchester encoded)
919//print full HID Prox ID and some bit format details if found
b3b70669 920int CmdFSKdemodHID(const char *Cmd)
921{
922 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
b3b70669 923 uint32_t hi2=0, hi=0, lo=0;
ba1a299c 924
eb191de6 925 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
b4fb11ba 926 size_t BitLen = getFromGraphBuf(BitStream);
927 if (BitLen==0) return 0;
b3b70669 928 //get binary from fsk wave
b4fb11ba 929 int idx = HIDdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
ec75f5c1 930 if (idx<0){
a1d17964 931 if (g_debugMode){
932 if (idx==-1){
b4fb11ba 933 PrintAndLog("DEBUG: Just Noise Detected");
a1d17964 934 } else if (idx == -2) {
935 PrintAndLog("DEBUG: Error demoding fsk");
936 } else if (idx == -3) {
937 PrintAndLog("DEBUG: Preamble not found");
938 } else if (idx == -4) {
939 PrintAndLog("DEBUG: Error in Manchester data, SIZE: %d", BitLen);
940 } else {
941 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
942 }
943 }
ec75f5c1 944 return 0;
945 }
946 if (hi2==0 && hi==0 && lo==0) {
947 if (g_debugMode) PrintAndLog("DEBUG: Error - no values found");
eb191de6 948 return 0;
949 }
950 if (hi2 != 0){ //extra large HID tags
b4fb11ba 951 PrintAndLog("HID Prox TAG ID: %x%08x%08x (%d)",
eb191de6 952 (unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
953 }
954 else { //standard HID tags <38 bits
d5a72d2f 955 uint8_t fmtLen = 0;
eb191de6 956 uint32_t fc = 0;
957 uint32_t cardnum = 0;
958 if (((hi>>5)&1)==1){//if bit 38 is set then < 37 bit format is used
959 uint32_t lo2=0;
84871873 960 lo2=(((hi & 31) << 12) | (lo>>20)); //get bits 21-37 to check for format len bit
eb191de6 961 uint8_t idx3 = 1;
962 while(lo2>1){ //find last bit set to 1 (format len bit)
963 lo2=lo2>>1;
964 idx3++;
b3b70669 965 }
b4fb11ba 966 fmtLen =idx3+19;
eb191de6 967 fc =0;
968 cardnum=0;
d5a72d2f 969 if(fmtLen==26){
eb191de6 970 cardnum = (lo>>1)&0xFFFF;
971 fc = (lo>>17)&0xFF;
972 }
d5a72d2f 973 if(fmtLen==34){
eb191de6 974 cardnum = (lo>>1)&0xFFFF;
975 fc= ((hi&1)<<15)|(lo>>17);
976 }
d5a72d2f 977 if(fmtLen==35){
eb191de6 978 cardnum = (lo>>1)&0xFFFFF;
979 fc = ((hi&1)<<11)|(lo>>21);
b3b70669 980 }
b3b70669 981 }
eb191de6 982 else { //if bit 38 is not set then 37 bit format is used
84871873 983 fmtLen = 37;
984 fc = 0;
985 cardnum = 0;
986 if(fmtLen == 37){
eb191de6 987 cardnum = (lo>>1)&0x7FFFF;
988 fc = ((hi&0xF)<<12)|(lo>>20);
989 }
b4fb11ba 990 }
991 PrintAndLog("HID Prox TAG ID: %x%08x (%d) - Format Len: %dbit - FC: %d - Card: %d",
eb191de6 992 (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF,
d5a72d2f 993 (unsigned int) fmtLen, (unsigned int) fc, (unsigned int) cardnum);
b3b70669 994 }
ec75f5c1 995 setDemodBuf(BitStream,BitLen,idx);
996 if (g_debugMode){
997 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, BitLen);
998 printDemodBuff();
999 }
1000 return 1;
1001}
1002
04d2721b 1003//by marshmellow
1004//Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
ec75f5c1 1005//print full Paradox Prox ID and some bit format details if found
1006int CmdFSKdemodParadox(const char *Cmd)
1007{
1008 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1009 uint32_t hi2=0, hi=0, lo=0;
1010
1011 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1012 size_t BitLen = getFromGraphBuf(BitStream);
e770c648 1013 if (BitLen==0) return 0;
ec75f5c1 1014 //get binary from fsk wave
a1d17964 1015 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
ec75f5c1 1016 if (idx<0){
a1d17964 1017 if (g_debugMode){
1018 if (idx==-1){
1019 PrintAndLog("DEBUG: Just Noise Detected");
1020 } else if (idx == -2) {
1021 PrintAndLog("DEBUG: Error demoding fsk");
1022 } else if (idx == -3) {
1023 PrintAndLog("DEBUG: Preamble not found");
1024 } else if (idx == -4) {
1025 PrintAndLog("DEBUG: Error in Manchester data");
1026 } else {
1027 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1028 }
1029 }
ec75f5c1 1030 return 0;
1031 }
1032 if (hi2==0 && hi==0 && lo==0){
1033 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
1034 return 0;
1035 }
1036 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
1037 uint32_t cardnum = (lo>>10)&0xFFFF;
abd6112f 1038 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1039 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1040 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
1041
1042 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
1043 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
ec75f5c1 1044 setDemodBuf(BitStream,BitLen,idx);
1045 if (g_debugMode){
1046 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
1047 printDemodBuff();
1048 }
1049 return 1;
b3b70669 1050}
1051
2fc2150e 1052//by marshmellow
eb191de6 1053//IO-Prox demod - FSK RF/64 with preamble of 000000001
1054//print ioprox ID and some format details
b3b70669 1055int CmdFSKdemodIO(const char *Cmd)
1056{
1057 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1058 //set defaults
b4fb11ba 1059 int idx=0;
ec75f5c1 1060 //something in graphbuffer?
1061 if (GraphTraceLen < 65) {
1062 if (g_debugMode)PrintAndLog("DEBUG: not enough samples in GraphBuffer");
1063 return 0;
1064 }
eb191de6 1065 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
b4fb11ba 1066 size_t BitLen = getFromGraphBuf(BitStream);
e770c648 1067 if (BitLen==0) return 0;
ec75f5c1 1068
eb191de6 1069 //get binary from fsk wave
b4fb11ba 1070 idx = IOdemodFSK(BitStream,BitLen);
eb191de6 1071 if (idx<0){
a1d17964 1072 if (g_debugMode){
1073 if (idx==-1){
1074 PrintAndLog("DEBUG: Just Noise Detected");
1075 } else if (idx == -2) {
1076 PrintAndLog("DEBUG: not enough samples");
1077 } else if (idx == -3) {
1078 PrintAndLog("DEBUG: error during fskdemod");
1079 } else if (idx == -4) {
1080 PrintAndLog("DEBUG: Preamble not found");
1081 } else if (idx == -5) {
1082 PrintAndLog("DEBUG: Separator bits not found");
1083 } else {
1084 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
1085 }
1086 }
eb191de6 1087 return 0;
1088 }
1089 if (idx==0){
ec75f5c1 1090 if (g_debugMode==1){
1091 PrintAndLog("DEBUG: IO Prox Data not found - FSK Bits: %d",BitLen);
1092 if (BitLen > 92) printBitStream(BitStream,92);
1093 }
d5a72d2f 1094 return 0;
b3b70669 1095 }
b3b70669 1096 //Index map
1097 //0 10 20 30 40 50 60
1098 //| | | | | | |
1099 //01234567 8 90123456 7 89012345 6 78901234 5 67890123 4 56789012 3 45678901 23
1100 //-----------------------------------------------------------------------------
1101 //00000000 0 11110000 1 facility 1 version* 1 code*one 1 code*two 1 ???????? 11
1102 //
1103 //XSF(version)facility:codeone+codetwo (raw)
1104 //Handle the data
ec75f5c1 1105 if (idx+64>BitLen) {
1106 if (g_debugMode==1) PrintAndLog("not enough bits found - bitlen: %d",BitLen);
1107 return 0;
1108 }
eb191de6 1109 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx], BitStream[idx+1], BitStream[idx+2], BitStream[idx+3], BitStream[idx+4], BitStream[idx+5], BitStream[idx+6], BitStream[idx+7], BitStream[idx+8]);
b4fb11ba 1110 PrintAndLog("%d%d%d%d%d%d%d%d %d",BitStream[idx+9], BitStream[idx+10], BitStream[idx+11],BitStream[idx+12],BitStream[idx+13],BitStream[idx+14],BitStream[idx+15],BitStream[idx+16],BitStream[idx+17]);
f822a063 1111 PrintAndLog("%d%d%d%d%d%d%d%d %d facility",BitStream[idx+18], BitStream[idx+19], BitStream[idx+20],BitStream[idx+21],BitStream[idx+22],BitStream[idx+23],BitStream[idx+24],BitStream[idx+25],BitStream[idx+26]);
1112 PrintAndLog("%d%d%d%d%d%d%d%d %d version",BitStream[idx+27], BitStream[idx+28], BitStream[idx+29],BitStream[idx+30],BitStream[idx+31],BitStream[idx+32],BitStream[idx+33],BitStream[idx+34],BitStream[idx+35]);
1113 PrintAndLog("%d%d%d%d%d%d%d%d %d code1",BitStream[idx+36], BitStream[idx+37], BitStream[idx+38],BitStream[idx+39],BitStream[idx+40],BitStream[idx+41],BitStream[idx+42],BitStream[idx+43],BitStream[idx+44]);
1114 PrintAndLog("%d%d%d%d%d%d%d%d %d code2",BitStream[idx+45], BitStream[idx+46], BitStream[idx+47],BitStream[idx+48],BitStream[idx+49],BitStream[idx+50],BitStream[idx+51],BitStream[idx+52],BitStream[idx+53]);
1115 PrintAndLog("%d%d%d%d%d%d%d%d %d%d checksum",BitStream[idx+54],BitStream[idx+55],BitStream[idx+56],BitStream[idx+57],BitStream[idx+58],BitStream[idx+59],BitStream[idx+60],BitStream[idx+61],BitStream[idx+62],BitStream[idx+63]);
ba1a299c 1116
eb191de6 1117 uint32_t code = bytebits_to_byte(BitStream+idx,32);
b4fb11ba 1118 uint32_t code2 = bytebits_to_byte(BitStream+idx+32,32);
f822a063 1119 uint8_t version = bytebits_to_byte(BitStream+idx+27,8); //14,4
1120 uint8_t facilitycode = bytebits_to_byte(BitStream+idx+18,8) ;
eb191de6 1121 uint16_t number = (bytebits_to_byte(BitStream+idx+36,8)<<8)|(bytebits_to_byte(BitStream+idx+45,8)); //36,9
b4fb11ba 1122 PrintAndLog("IO Prox XSF(%02d)%02x:%05d (%08x%08x)",version,facilitycode,number,code,code2);
ec75f5c1 1123 setDemodBuf(BitStream,64,idx);
b4fb11ba 1124 if (g_debugMode){
ec75f5c1 1125 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing demod buffer:",idx,64);
1126 printDemodBuff();
1127 }
b4fb11ba 1128 return 1;
b3b70669 1129}
1e090a61 1130
1e090a61 1131//by marshmellow
1132//AWID Prox demod - FSK RF/50 with preamble of 00000001 (always a 96 bit data stream)
1133//print full AWID Prox ID and some bit format details if found
1134int CmdFSKdemodAWID(const char *Cmd)
1135{
1136
ec75f5c1 1137 //int verbose=1;
1138 //sscanf(Cmd, "%i", &verbose);
1e090a61 1139
1140 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1141 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1142 size_t size = getFromGraphBuf(BitStream);
e770c648 1143 if (size==0) return 0;
1e090a61 1144
1145 //get binary from fsk wave
a1d17964 1146 int idx = AWIDdemodFSK(BitStream, &size);
1e090a61 1147 if (idx<=0){
ec75f5c1 1148 if (g_debugMode==1){
1e090a61 1149 if (idx == -1)
ec75f5c1 1150 PrintAndLog("DEBUG: Error - not enough samples");
1e090a61 1151 else if (idx == -2)
a1d17964 1152 PrintAndLog("DEBUG: Error - only noise found");
1e090a61 1153 else if (idx == -3)
ec75f5c1 1154 PrintAndLog("DEBUG: Error - problem during FSK demod");
1e090a61 1155 else if (idx == -4)
ec75f5c1 1156 PrintAndLog("DEBUG: Error - AWID preamble not found");
1157 else if (idx == -5)
a1d17964 1158 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
ec75f5c1 1159 else
1160 PrintAndLog("DEBUG: Error %d",idx);
1e090a61 1161 }
1162 return 0;
1163 }
1164
1165 // Index map
1166 // 0 10 20 30 40 50 60
1167 // | | | | | | |
1168 // 01234567 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 456 7 890 1 234 5 678 9 012 3 - to 96
1169 // -----------------------------------------------------------------------------
1170 // 00000001 000 1 110 1 101 1 011 1 101 1 010 0 000 1 000 1 010 0 001 0 110 1 100 0 000 1 000 1
1171 // premable bbb o bbb o bbw o fff o fff o ffc o ccc o ccc o ccc o ccc o ccc o wxx o xxx o xxx o - to 96
1172 // |---26 bit---| |-----117----||-------------142-------------|
1173 // b = format bit len, o = odd parity of last 3 bits
1174 // f = facility code, c = card number
1175 // w = wiegand parity
1176 // (26 bit format shown)
1177
1178 //get raw ID before removing parities
1179 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
1180 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
1181 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
ec75f5c1 1182 setDemodBuf(BitStream,96,idx);
1183
1e090a61 1184 size = removeParity(BitStream, idx+8, 4, 1, 88);
1185 if (size != 66){
ec75f5c1 1186 if (g_debugMode==1) PrintAndLog("DEBUG: Error - at parity check-tag size does not match AWID format");
1e090a61 1187 return 0;
1188 }
1189 // ok valid card found!
1190
1191 // Index map
1192 // 0 10 20 30 40 50 60
1193 // | | | | | | |
1194 // 01234567 8 90123456 7890123456789012 3 456789012345678901234567890123456
1195 // -----------------------------------------------------------------------------
1196 // 00011010 1 01110101 0000000010001110 1 000000000000000000000000000000000
1197 // bbbbbbbb w ffffffff cccccccccccccccc w xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1198 // |26 bit| |-117--| |-----142------|
1199 // b = format bit len, o = odd parity of last 3 bits
1200 // f = facility code, c = card number
1201 // w = wiegand parity
1202 // (26 bit format shown)
1203
1204 uint32_t fc = 0;
1205 uint32_t cardnum = 0;
1206 uint32_t code1 = 0;
1207 uint32_t code2 = 0;
1208 uint8_t fmtLen = bytebits_to_byte(BitStream,8);
1209 if (fmtLen==26){
1210 fc = bytebits_to_byte(BitStream+9, 8);
1211 cardnum = bytebits_to_byte(BitStream+17, 16);
1212 code1 = bytebits_to_byte(BitStream+8,fmtLen);
abd6112f 1213 PrintAndLog("AWID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi2, rawHi, rawLo);
1e090a61 1214 } else {
1215 cardnum = bytebits_to_byte(BitStream+8+(fmtLen-17), 16);
1216 if (fmtLen>32){
1217 code1 = bytebits_to_byte(BitStream+8,fmtLen-32);
1218 code2 = bytebits_to_byte(BitStream+8+(fmtLen-32),32);
abd6112f 1219 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x%08x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, code2, rawHi2, rawHi, rawLo);
1e090a61 1220 } else{
1221 code1 = bytebits_to_byte(BitStream+8,fmtLen);
abd6112f 1222 PrintAndLog("AWID Found - BitLength: %d -unknown BitLength- (%d) - Wiegand: %x, Raw: %08x%08x%08x", fmtLen, cardnum, code1, rawHi2, rawHi, rawLo);
1e090a61 1223 }
1224 }
ec75f5c1 1225 if (g_debugMode){
1226 PrintAndLog("DEBUG: idx: %d, Len: %d Printing Demod Buffer:", idx, 96);
1227 printDemodBuff();
1228 }
1e090a61 1229 //todo - convert hi2, hi, lo to demodbuffer for future sim/clone commands
1e090a61 1230 return 1;
1231}
1232
1233//by marshmellow
1234//Pyramid Prox demod - FSK RF/50 with preamble of 0000000000000001 (always a 128 bit data stream)
1235//print full Farpointe Data/Pyramid Prox ID and some bit format details if found
1236int CmdFSKdemodPyramid(const char *Cmd)
1237{
1e090a61 1238 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
1239 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1240 size_t size = getFromGraphBuf(BitStream);
e770c648 1241 if (size==0) return 0;
1e090a61 1242
1243 //get binary from fsk wave
a1d17964 1244 int idx = PyramiddemodFSK(BitStream, &size);
1e090a61 1245 if (idx < 0){
ec75f5c1 1246 if (g_debugMode==1){
1e090a61 1247 if (idx == -5)
ec75f5c1 1248 PrintAndLog("DEBUG: Error - not enough samples");
1e090a61 1249 else if (idx == -1)
a1d17964 1250 PrintAndLog("DEBUG: Error - only noise found");
1e090a61 1251 else if (idx == -2)
ec75f5c1 1252 PrintAndLog("DEBUG: Error - problem during FSK demod");
1253 else if (idx == -3)
a1d17964 1254 PrintAndLog("DEBUG: Error - Size not correct: %d", size);
1e090a61 1255 else if (idx == -4)
ec75f5c1 1256 PrintAndLog("DEBUG: Error - Pyramid preamble not found");
1257 else
1258 PrintAndLog("DEBUG: Error - idx: %d",idx);
1e090a61 1259 }
1e090a61 1260 return 0;
1261 }
1e090a61 1262 // Index map
1263 // 0 10 20 30 40 50 60
1264 // | | | | | | |
1265 // 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3
1266 // -----------------------------------------------------------------------------
1267 // 0000000 0 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1 0000000 1
1268 // premable xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o xxxxxxx o
1269
1270 // 64 70 80 90 100 110 120
1271 // | | | | | | |
1272 // 4567890 1 2345678 9 0123456 7 8901234 5 6789012 3 4567890 1 2345678 9 0123456 7
1273 // -----------------------------------------------------------------------------
1274 // 0000000 1 0000000 1 0000000 1 0110111 0 0011000 1 0000001 0 0001100 1 1001010 0
1275 // xxxxxxx o xxxxxxx o xxxxxxx o xswffff o ffffccc o ccccccc o ccccccw o ppppppp o
1276 // |---115---||---------71---------|
1277 // s = format start bit, o = odd parity of last 7 bits
1278 // f = facility code, c = card number
1279 // w = wiegand parity, x = extra space for other formats
1280 // p = unknown checksum
1281 // (26 bit format shown)
1282
1283 //get raw ID before removing parities
1284 uint32_t rawLo = bytebits_to_byte(BitStream+idx+96,32);
1285 uint32_t rawHi = bytebits_to_byte(BitStream+idx+64,32);
1286 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx+32,32);
1287 uint32_t rawHi3 = bytebits_to_byte(BitStream+idx,32);
ec75f5c1 1288 setDemodBuf(BitStream,128,idx);
1289
1e090a61 1290 size = removeParity(BitStream, idx+8, 8, 1, 120);
1291 if (size != 105){
ec75f5c1 1292 if (g_debugMode==1) PrintAndLog("DEBUG: Error at parity check-tag size does not match Pyramid format, SIZE: %d, IDX: %d, hi3: %x",size, idx, rawHi3);
1e090a61 1293 return 0;
1294 }
1295
1296 // ok valid card found!
1297
1298 // Index map
1299 // 0 10 20 30 40 50 60 70
1300 // | | | | | | | |
1301 // 01234567890123456789012345678901234567890123456789012345678901234567890
1302 // -----------------------------------------------------------------------
1303 // 00000000000000000000000000000000000000000000000000000000000000000000000
1304 // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
1305
1306 // 71 80 90 100
1307 // | | | |
1308 // 1 2 34567890 1234567890123456 7 8901234
1309 // ---------------------------------------
1310 // 1 1 01110011 0000000001000110 0 1001010
1311 // s w ffffffff cccccccccccccccc w ppppppp
1312 // |--115-| |------71------|
1313 // s = format start bit, o = odd parity of last 7 bits
1314 // f = facility code, c = card number
1315 // w = wiegand parity, x = extra space for other formats
1316 // p = unknown checksum
1317 // (26 bit format shown)
1318
1319 //find start bit to get fmtLen
1e090a61 1320 int j;
1321 for (j=0; j<size; j++){
ec75f5c1 1322 if(BitStream[j]) break;
1e090a61 1323 }
1324 uint8_t fmtLen = size-j-8;
1325 uint32_t fc = 0;
1326 uint32_t cardnum = 0;
1327 uint32_t code1 = 0;
1328 //uint32_t code2 = 0;
1329 if (fmtLen==26){
1330 fc = bytebits_to_byte(BitStream+73, 8);
1331 cardnum = bytebits_to_byte(BitStream+81, 16);
1332 code1 = bytebits_to_byte(BitStream+72,fmtLen);
abd6112f 1333 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Wiegand: %x, Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, code1, rawHi3, rawHi2, rawHi, rawLo);
1e090a61 1334 } else if (fmtLen==45){
1335 fmtLen=42; //end = 10 bits not 7 like 26 bit fmt
1336 fc = bytebits_to_byte(BitStream+53, 10);
1337 cardnum = bytebits_to_byte(BitStream+63, 32);
abd6112f 1338 PrintAndLog("Pyramid ID Found - BitLength: %d, FC: %d, Card: %d - Raw: %08x%08x%08x%08x", fmtLen, fc, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1e090a61 1339 } else {
1340 cardnum = bytebits_to_byte(BitStream+81, 16);
1341 if (fmtLen>32){
1342 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen-32);
1343 //code2 = bytebits_to_byte(BitStream+(size-32),32);
abd6112f 1344 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1e090a61 1345 } else{
1346 //code1 = bytebits_to_byte(BitStream+(size-fmtLen),fmtLen);
abd6112f 1347 PrintAndLog("Pyramid ID Found - BitLength: %d -unknown BitLength- (%d), Raw: %08x%08x%08x%08x", fmtLen, cardnum, rawHi3, rawHi2, rawHi, rawLo);
1e090a61 1348 }
1349 }
ec75f5c1 1350 if (g_debugMode){
1351 PrintAndLog("DEBUG: idx: %d, Len: %d, Printing Demod Buffer:", idx, 128);
1352 printDemodBuff();
1353 }
1e090a61 1354 return 1;
1355}
1356
e888ed8e 1357int CmdFSKdemod(const char *Cmd) //old CmdFSKdemod needs updating
7fe9b0b7 1358{
1359 static const int LowTone[] = {
1360 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1361 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1362 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1363 1, 1, 1, 1, 1, -1, -1, -1, -1, -1,
1364 1, 1, 1, 1, 1, -1, -1, -1, -1, -1
1365 };
1366 static const int HighTone[] = {
1367 1, 1, 1, 1, 1, -1, -1, -1, -1,
1368 1, 1, 1, 1, -1, -1, -1, -1,
1369 1, 1, 1, 1, -1, -1, -1, -1,
1370 1, 1, 1, 1, -1, -1, -1, -1,
1371 1, 1, 1, 1, -1, -1, -1, -1,
1372 1, 1, 1, 1, -1, -1, -1, -1, -1,
1373 };
1374
1375 int lowLen = sizeof (LowTone) / sizeof (int);
1376 int highLen = sizeof (HighTone) / sizeof (int);
b915fda3 1377 int convLen = (highLen > lowLen) ? highLen : lowLen;
7fe9b0b7 1378 uint32_t hi = 0, lo = 0;
1379
1380 int i, j;
1381 int minMark = 0, maxMark = 0;
952a8bb5 1382
7fe9b0b7 1383 for (i = 0; i < GraphTraceLen - convLen; ++i) {
1384 int lowSum = 0, highSum = 0;
1385
1386 for (j = 0; j < lowLen; ++j) {
1387 lowSum += LowTone[j]*GraphBuffer[i+j];
1388 }
1389 for (j = 0; j < highLen; ++j) {
1390 highSum += HighTone[j] * GraphBuffer[i + j];
1391 }
1392 lowSum = abs(100 * lowSum / lowLen);
1393 highSum = abs(100 * highSum / highLen);
1394 GraphBuffer[i] = (highSum << 16) | lowSum;
1395 }
1396
1397 for(i = 0; i < GraphTraceLen - convLen - 16; ++i) {
1398 int lowTot = 0, highTot = 0;
1399 // 10 and 8 are f_s divided by f_l and f_h, rounded
1400 for (j = 0; j < 10; ++j) {
1401 lowTot += (GraphBuffer[i+j] & 0xffff);
1402 }
1403 for (j = 0; j < 8; j++) {
1404 highTot += (GraphBuffer[i + j] >> 16);
1405 }
1406 GraphBuffer[i] = lowTot - highTot;
1407 if (GraphBuffer[i] > maxMark) maxMark = GraphBuffer[i];
1408 if (GraphBuffer[i] < minMark) minMark = GraphBuffer[i];
1409 }
1410
1411 GraphTraceLen -= (convLen + 16);
1412 RepaintGraphWindow();
1413
b3b70669 1414 // Find bit-sync (3 lo followed by 3 high) (HID ONLY)
7fe9b0b7 1415 int max = 0, maxPos = 0;
1416 for (i = 0; i < 6000; ++i) {
1417 int dec = 0;
1418 for (j = 0; j < 3 * lowLen; ++j) {
1419 dec -= GraphBuffer[i + j];
1420 }
1421 for (; j < 3 * (lowLen + highLen ); ++j) {
1422 dec += GraphBuffer[i + j];
1423 }
1424 if (dec > max) {
1425 max = dec;
1426 maxPos = i;
1427 }
1428 }
1429
1430 // place start of bit sync marker in graph
1431 GraphBuffer[maxPos] = maxMark;
1432 GraphBuffer[maxPos + 1] = minMark;
1433
1434 maxPos += j;
1435
1436 // place end of bit sync marker in graph
1437 GraphBuffer[maxPos] = maxMark;
1438 GraphBuffer[maxPos+1] = minMark;
1439
1440 PrintAndLog("actual data bits start at sample %d", maxPos);
1441 PrintAndLog("length %d/%d", highLen, lowLen);
ba1a299c 1442
a1557c4c 1443 uint8_t bits[46] = {0x00};
ba1a299c 1444
7fe9b0b7 1445 // find bit pairs and manchester decode them
1446 for (i = 0; i < arraylen(bits) - 1; ++i) {
1447 int dec = 0;
1448 for (j = 0; j < lowLen; ++j) {
1449 dec -= GraphBuffer[maxPos + j];
1450 }
1451 for (; j < lowLen + highLen; ++j) {
1452 dec += GraphBuffer[maxPos + j];
1453 }
1454 maxPos += j;
1455 // place inter bit marker in graph
1456 GraphBuffer[maxPos] = maxMark;
1457 GraphBuffer[maxPos + 1] = minMark;
1458
1459 // hi and lo form a 64 bit pair
1460 hi = (hi << 1) | (lo >> 31);
1461 lo = (lo << 1);
1462 // store decoded bit as binary (in hi/lo) and text (in bits[])
1463 if(dec < 0) {
1464 bits[i] = '1';
1465 lo |= 1;
1466 } else {
1467 bits[i] = '0';
1468 }
1469 }
1470 PrintAndLog("bits: '%s'", bits);
1471 PrintAndLog("hex: %08x %08x", hi, lo);
1472 return 0;
1473}
e888ed8e 1474
e770c648 1475//by marshmellow
1476//attempt to psk1 demod graph buffer
4ac906d1 1477int PSKDemod(const char *Cmd, bool verbose)
e770c648 1478{
1479 int invert=0;
1480 int clk=0;
1481 int maxErr=100;
1482 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1483 if (clk==1){
1484 invert=1;
1485 clk=0;
1486 }
1487 if (invert != 0 && invert != 1) {
4ac906d1 1488 if (verbose) PrintAndLog("Invalid argument: %s", Cmd);
e770c648 1489 return -1;
1490 }
1491 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1492 size_t BitLen = getFromGraphBuf(BitStream);
3f41e73c 1493 if (BitLen==0) return -1;
1494 uint8_t carrier=countPSK_FC(BitStream, BitLen);
1495 if (carrier!=2 && carrier!=4 || carrier!=8){
1496 //invalid carrier
1497 return -1
1498 }
e770c648 1499 int errCnt=0;
3f41e73c 1500 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
e770c648 1501 if (errCnt > maxErr){
4ac906d1 1502 if (g_debugMode==1 && verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
e770c648 1503 return -1;
1504 }
1505 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
4ac906d1 1506 if (g_debugMode==1 && verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
e770c648 1507 return -1;
1508 }
1509 if (verbose) PrintAndLog("Tried PSK Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1510 //prime demod buffer for output
1511 setDemodBuf(BitStream,BitLen,0);
1512 return errCnt;
4118b74d 1513}
e770c648 1514
4118b74d 1515// Indala 26 bit decode
1516// by marshmellow
1517// optional arguments - same as CmdpskNRZrawDemod (clock & invert)
1518int CmdIndalaDecode(const char *Cmd)
1519{
b4fb11ba 1520 int ans;
1521 if (strlen(Cmd)>0){
1522 ans = PSKDemod(Cmd, 0);
1523 } else{ //default to RF/32
1524 ans = PSKDemod("32", 0);
1525 }
4118b74d 1526
ba1a299c 1527 if (ans < 0){
ec75f5c1 1528 if (g_debugMode==1)
b4fb11ba 1529 PrintAndLog("Error1: %d",ans);
ba1a299c 1530 return 0;
1531 }
1532 uint8_t invert=0;
1533 ans = indala26decode(DemodBuffer,(size_t *) &DemodBufferLen, &invert);
1534 if (ans < 1) {
ec75f5c1 1535 if (g_debugMode==1)
b4fb11ba 1536 PrintAndLog("Error2: %d",ans);
ba1a299c 1537 return -1;
1538 }
a1d17964 1539 char showbits[251]={0x00};
84871873 1540 if (invert)
b4fb11ba 1541 if (g_debugMode==1)
1542 PrintAndLog("Had to invert bits");
ec75f5c1 1543
ba1a299c 1544 //convert UID to HEX
1545 uint32_t uid1, uid2, uid3, uid4, uid5, uid6, uid7;
1546 int idx;
1547 uid1=0;
1548 uid2=0;
1549 PrintAndLog("BitLen: %d",DemodBufferLen);
1550 if (DemodBufferLen==64){
1551 for( idx=0; idx<64; idx++) {
1552 uid1=(uid1<<1)|(uid2>>31);
1553 if (DemodBuffer[idx] == 0) {
1554 uid2=(uid2<<1)|0;
1555 showbits[idx]='0';
1556 } else {
1557 uid2=(uid2<<1)|1;
1558 showbits[idx]='1';
1559 }
1560 }
1561 showbits[idx]='\0';
1562 PrintAndLog("Indala UID=%s (%x%08x)", showbits, uid1, uid2);
1563 }
1564 else {
1565 uid3=0;
1566 uid4=0;
1567 uid5=0;
1568 uid6=0;
1569 uid7=0;
1570 for( idx=0; idx<DemodBufferLen; idx++) {
1571 uid1=(uid1<<1)|(uid2>>31);
1572 uid2=(uid2<<1)|(uid3>>31);
1573 uid3=(uid3<<1)|(uid4>>31);
1574 uid4=(uid4<<1)|(uid5>>31);
1575 uid5=(uid5<<1)|(uid6>>31);
1576 uid6=(uid6<<1)|(uid7>>31);
1577 if (DemodBuffer[idx] == 0) {
1578 uid7=(uid7<<1)|0;
1579 showbits[idx]='0';
1580 }
1581 else {
1582 uid7=(uid7<<1)|1;
1583 showbits[idx]='1';
1584 }
1585 }
1586 showbits[idx]='\0';
1587 PrintAndLog("Indala UID=%s (%x%08x%08x%08x%08x%08x%08x)", showbits, uid1, uid2, uid3, uid4, uid5, uid6, uid7);
1588 }
b4fb11ba 1589 if (g_debugMode){
1590 PrintAndLog("DEBUG: printing demodbuffer:");
1591 printDemodBuff();
1592 }
ba1a299c 1593 return 1;
4118b74d 1594}
1595
04d2721b 1596// by marshmellow
e770c648 1597// takes 3 arguments - clock, invert, maxErr as integers
1598// attempts to demodulate nrz only
1599// prints binary found and saves in demodbuffer for further commands
b4a2fcf6 1600
1601int NRZrawDemod(const char *Cmd, bool verbose)
e770c648 1602{
1603 int invert=0;
1604 int clk=0;
1605 int maxErr=100;
e770c648 1606 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
1607 if (clk==1){
1608 invert=1;
1609 clk=0;
1610 }
1611 if (invert != 0 && invert != 1) {
1612 PrintAndLog("Invalid argument: %s", Cmd);
1613 return 0;
1614 }
1615 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
1616 size_t BitLen = getFromGraphBuf(BitStream);
1617 if (BitLen==0) return 0;
1618 int errCnt=0;
1619 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, maxErr);
1620 if (errCnt > maxErr){
b4a2fcf6 1621 if (g_debugMode==1 && verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
e770c648 1622 return 0;
1623 }
1624 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
b4a2fcf6 1625 if (g_debugMode==1 && verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
e770c648 1626 return 0;
1627 }
1628 PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
1629 //prime demod buffer for output
1630 setDemodBuf(BitStream,BitLen,0);
1631
b4a2fcf6 1632 if (errCnt>0 && verbose){
e770c648 1633 PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
e770c648 1634 }
b4a2fcf6 1635 if (verbose) {
1636 PrintAndLog("NRZ demoded bitstream:");
1637 // Now output the bitstream to the scrollback by line of 16 bits
1638 printDemodBuff();
1639 }
1640 return 1;
1641}
1642
1643int CmdNRZrawDemod(const char *Cmd)
1644{
1645 char cmdp = param_getchar(Cmd, 0);
1646 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
1647 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
1648 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1649 PrintAndLog(" <invert>, 1 for invert output");
1650 PrintAndLog(" [set maximum allowed errors], default = 100.");
1651 PrintAndLog("");
1652 PrintAndLog(" sample: data nrzrawdemod = demod a nrz/direct tag from GraphBuffer");
1653 PrintAndLog(" : data nrzrawdemod 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
1654 PrintAndLog(" : data nrzrawdemod 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
1655 PrintAndLog(" : data nrzrawdemod 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
1656 PrintAndLog(" : data nrzrawdemod 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
1657 return 0;
1658 }
1659 return NRZrawDemod(Cmd, TRUE);
e770c648 1660}
1661
1662// by marshmellow
1663// takes 3 arguments - clock, invert, maxErr as integers
04d2721b 1664// attempts to demodulate psk only
1665// prints binary found and saves in demodbuffer for further commands
e770c648 1666int CmdPSK1rawDemod(const char *Cmd)
4118b74d 1667{
84871873 1668 int errCnt;
e770c648 1669 char cmdp = param_getchar(Cmd, 0);
6de43508 1670 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
19ff0210 1671 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
e770c648 1672 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1673 PrintAndLog(" <invert>, 1 for invert output");
1674 PrintAndLog(" [set maximum allowed errors], default = 100.");
1675 PrintAndLog("");
1676 PrintAndLog(" sample: data psk1rawdemod = demod a psk1 tag from GraphBuffer");
1677 PrintAndLog(" : data psk1rawdemod 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1678 PrintAndLog(" : data psk1rawdemod 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1679 PrintAndLog(" : data psk1rawdemod 1 = demod a psk1 tag from GraphBuffer while inverting data");
1680 PrintAndLog(" : data psk1rawdemod 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
1681 return 0;
1682 }
4ac906d1 1683 errCnt = PSKDemod(Cmd, TRUE);
b4fb11ba 1684 //output
1685 if (errCnt<0){
e770c648 1686 if (g_debugMode) PrintAndLog("Error demoding: %d",errCnt);
ec75f5c1 1687 return 0;
e770c648 1688 }
b4fb11ba 1689 if (errCnt>0){
e770c648 1690 PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
ec75f5c1 1691 }
e770c648 1692 PrintAndLog("PSK demoded bitstream:");
1693 // Now output the bitstream to the scrollback by line of 16 bits
1694 printDemodBuff();
1695 return 1;
4118b74d 1696}
1697
04d2721b 1698// by marshmellow
19ff0210 1699// takes same args as cmdpsk1rawdemod
04d2721b 1700int CmdPSK2rawDemod(const char *Cmd)
1701{
1702 int errCnt=0;
e770c648 1703 char cmdp = param_getchar(Cmd, 0);
6de43508 1704 if (strlen(Cmd) > 10 || cmdp == 'h' || cmdp == 'H') {
19ff0210 1705 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
e770c648 1706 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1707 PrintAndLog(" <invert>, 1 for invert output");
1708 PrintAndLog(" [set maximum allowed errors], default = 100.");
1709 PrintAndLog("");
1710 PrintAndLog(" sample: data psk2rawdemod = demod a psk2 tag from GraphBuffer, autodetect clock");
1711 PrintAndLog(" : data psk2rawdemod 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1712 PrintAndLog(" : data psk2rawdemod 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1713 PrintAndLog(" : data psk2rawdemod 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1714 PrintAndLog(" : data psk2rawdemod 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
1715 return 0;
1716 }
3f41e73c 1717 errCnt=PSKDemod(Cmd, TRUE);
04d2721b 1718 if (errCnt<0){
1719 if (g_debugMode) PrintAndLog("Error demoding: %d",errCnt);
1720 return 0;
1721 }
1722 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1723 if (errCnt>0){
1724 if (g_debugMode){
1725 PrintAndLog("# Errors during Demoding (shown as 77 in bit stream): %d",errCnt);
1726 PrintAndLog("PSK2 demoded bitstream:");
1727 // Now output the bitstream to the scrollback by line of 16 bits
1728 printDemodBuff();
1729 }
1730 }else{
1731 PrintAndLog("PSK2 demoded bitstream:");
1732 // Now output the bitstream to the scrollback by line of 16 bits
1733 printDemodBuff();
1734 }
1735 return 1;
1736}
1737
19ff0210 1738// by marshmellow - combines all raw demod functions into one menu command
1739int CmdRawDemod(const char *Cmd)
1740{
1741 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1742
1743 if (strlen(Cmd) > 14 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
1744 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
1745 PrintAndLog(" [modulation] as 2 char, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
1746 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1747 PrintAndLog(" <options> see specific modulation help for optional parameters");
1748 PrintAndLog("");
1749 PrintAndLog(" sample: data rawdemod fs h = print help for ask/raw demod");
1750 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
1751 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1752 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1753 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1754 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1755 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1756 return 0;
1757 }
1758 char cmdp2 = Cmd[1];
1759 int ans = 0;
1760 if (cmdp == 'f' && cmdp2 == 's'){
1761 ans = CmdFSKrawdemod(Cmd+3);
1762 } else if(cmdp == 'a' && cmdp2 == 'm'){
1763 ans = Cmdaskmandemod(Cmd+3);
1764 } else if(cmdp == 'a' && cmdp2 == 'r'){
1765 ans = Cmdaskrawdemod(Cmd+3);
1766 } else if(cmdp == 'n' && cmdp2 == 'r'){
1767 ans = CmdNRZrawDemod(Cmd+3);
1768 } else if(cmdp == 'p' && cmdp2 == '1'){
1769 ans = CmdPSK1rawDemod(Cmd+3);
1770 } else if(cmdp == 'p' && cmdp2 == '2'){
1771 ans = CmdPSK2rawDemod(Cmd+3);
1772 } else {
1773 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1774 }
1775 return ans;
1776}
1777
7fe9b0b7 1778int CmdGrid(const char *Cmd)
1779{
1780 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
7ddb9900 1781 PlotGridXdefault= PlotGridX;
1782 PlotGridYdefault= PlotGridY;
7fe9b0b7 1783 RepaintGraphWindow();
1784 return 0;
1785}
1786
1787int CmdHexsamples(const char *Cmd)
1788{
4961e292 1789 int i, j;
7fe9b0b7 1790 int requested = 0;
1791 int offset = 0;
4961e292 1792 char string_buf[25];
1793 char* string_ptr = string_buf;
f71f4deb 1794 uint8_t got[BIGBUF_SIZE];
952a8bb5 1795
4961e292 1796 sscanf(Cmd, "%i %i", &requested, &offset);
90d74dc2 1797
4961e292 1798 /* if no args send something */
1799 if (requested == 0) {
90d74dc2 1800 requested = 8;
1801 }
90d74dc2 1802 if (offset + requested > sizeof(got)) {
f71f4deb 1803 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
4961e292 1804 return 0;
952a8bb5 1805 }
90d74dc2 1806
4961e292 1807 GetFromBigBuf(got,requested,offset);
90d74dc2 1808 WaitForResponse(CMD_ACK,NULL);
1809
4961e292 1810 i = 0;
1811 for (j = 0; j < requested; j++) {
1812 i++;
1813 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1814 if (i == 8) {
1815 *(string_ptr - 1) = '\0'; // remove the trailing space
1816 PrintAndLog("%s", string_buf);
1817 string_buf[0] = '\0';
1818 string_ptr = string_buf;
1819 i = 0;
1820 }
1821 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1822 *(string_ptr - 1) = '\0';
1823 PrintAndLog("%s", string_buf);
1824 string_buf[0] = '\0';
b4fb11ba 1825 }
7fe9b0b7 1826 }
1827 return 0;
1828}
1829
7fe9b0b7 1830int CmdHide(const char *Cmd)
1831{
1832 HideGraphWindow();
1833 return 0;
1834}
1835
1836int CmdHpf(const char *Cmd)
1837{
1838 int i;
1839 int accum = 0;
1840
1841 for (i = 10; i < GraphTraceLen; ++i)
1842 accum += GraphBuffer[i];
1843 accum /= (GraphTraceLen - 10);
1844 for (i = 0; i < GraphTraceLen; ++i)
1845 GraphBuffer[i] -= accum;
1846
1847 RepaintGraphWindow();
1848 return 0;
1849}
f6d9fb17
MHS
1850typedef struct {
1851 uint8_t * buffer;
1852 uint32_t numbits;
1853 uint32_t position;
1854}BitstreamOut;
1855
1856bool _headBit( BitstreamOut *stream)
1857{
1858 int bytepos = stream->position >> 3; // divide by 8
1859 int bitpos = (stream->position++) & 7; // mask out 00000111
1860 return (*(stream->buffer + bytepos) >> (7-bitpos)) & 1;
1861}
1862
1863uint8_t getByte(uint8_t bits_per_sample, BitstreamOut* b)
1864{
1865 int i;
1866 uint8_t val = 0;
1867 for(i =0 ; i < bits_per_sample; i++)
1868 {
1869 val |= (_headBit(b) << (7-i));
1870 }
1871 return val;
1872}
7fe9b0b7 1873
8d183c53 1874int CmdSamples(const char *Cmd)
7fe9b0b7 1875{
31abe49f
MHS
1876 //If we get all but the last byte in bigbuf,
1877 // we don't have to worry about remaining trash
1878 // in the last byte in case the bits-per-sample
1879 // does not line up on byte boundaries
0644d5e3 1880 uint8_t got[BIGBUF_SIZE-1] = { 0 };
ba1a299c 1881
d6d20c54 1882 int n = strtol(Cmd, NULL, 0);
1883 if (n == 0)
31abe49f 1884 n = sizeof(got);
d6d20c54 1885
1886 if (n > sizeof(got))
1887 n = sizeof(got);
ba1a299c 1888
f6d9fb17 1889 PrintAndLog("Reading %d bytes from device memory\n", n);
f71f4deb 1890 GetFromBigBuf(got,n,0);
f6d9fb17
MHS
1891 PrintAndLog("Data fetched");
1892 UsbCommand response;
1893 WaitForResponse(CMD_ACK, &response);
31abe49f
MHS
1894 uint8_t bits_per_sample = 8;
1895
1896 //Old devices without this feature would send 0 at arg[0]
1897 if(response.arg[0] > 0)
1898 {
1899 sample_config *sc = (sample_config *) response.d.asBytes;
1900 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1901 , sc->decimation);
1902 bits_per_sample = sc->bits_per_sample;
f71f4deb 1903 }
f6d9fb17
MHS
1904 if(bits_per_sample < 8)
1905 {
1906 PrintAndLog("Unpacking...");
1907 BitstreamOut bout = { got, bits_per_sample * n, 0};
1908 int j =0;
31abe49f 1909 for (j = 0; j * bits_per_sample < n * 8 && j < sizeof(GraphBuffer); j++) {
f6d9fb17
MHS
1910 uint8_t sample = getByte(bits_per_sample, &bout);
1911 GraphBuffer[j] = ((int) sample )- 128;
1912 }
1913 GraphTraceLen = j;
1914 PrintAndLog("Unpacked %d samples" , j );
1915 }else
1916 {
1917 for (int j = 0; j < n; j++) {
1918 GraphBuffer[j] = ((int)got[j]) - 128;
1919 }
1920 GraphTraceLen = n;
f6d9fb17
MHS
1921 }
1922
f71f4deb 1923 RepaintGraphWindow();
1924 return 0;
7fe9b0b7 1925}
1926
d6a120a2
MHS
1927int CmdTuneSamples(const char *Cmd)
1928{
3aa4014b 1929 int timeout = 0;
1930 printf("\nMeasuring antenna characteristics, please wait...");
ba1a299c 1931
3aa4014b 1932 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING};
1933 SendCommand(&c);
1934
1935 UsbCommand resp;
1936 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1937 timeout++;
1938 printf(".");
1939 if (timeout > 7) {
1940 PrintAndLog("\nNo response from Proxmark. Aborting...");
1941 return 1;
1942 }
1943 }
1944
1945 int peakv, peakf;
1946 int vLf125, vLf134, vHf;
1947 vLf125 = resp.arg[0] & 0xffff;
1948 vLf134 = resp.arg[0] >> 16;
1949 vHf = resp.arg[1] & 0xffff;;
1950 peakf = resp.arg[2] & 0xffff;
1951 peakv = resp.arg[2] >> 16;
1952 PrintAndLog("");
1953 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1954 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1955 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1956 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
0d0d0499 1957
1958#define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1959#define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1960#define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1961#define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1962
1963 if (peakv < LF_UNUSABLE_V)
3aa4014b 1964 PrintAndLog("# Your LF antenna is unusable.");
0d0d0499 1965 else if (peakv < LF_MARGINAL_V)
3aa4014b 1966 PrintAndLog("# Your LF antenna is marginal.");
0d0d0499 1967 if (vHf < HF_UNUSABLE_V)
3aa4014b 1968 PrintAndLog("# Your HF antenna is unusable.");
0d0d0499 1969 else if (vHf < HF_MARGINAL_V)
3aa4014b 1970 PrintAndLog("# Your HF antenna is marginal.");
1971
0d0d0499 1972 if (peakv >= LF_UNUSABLE_V) {
1973 for (int i = 0; i < 256; i++) {
1974 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1975 }
1976 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1977 PrintAndLog("\n");
1978 GraphTraceLen = 256;
1979 ShowGraphWindow();
abd16c45 1980 RepaintGraphWindow();
ba1a299c 1981 }
1982
b4fb11ba 1983 return 0;
d6a120a2
MHS
1984}
1985
3aa4014b 1986
7fe9b0b7 1987int CmdLoad(const char *Cmd)
1988{
ec75f5c1 1989 char filename[FILE_PATH_SIZE] = {0x00};
1990 int len = 0;
b915fda3 1991
ec75f5c1 1992 len = strlen(Cmd);
1993 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1994 memcpy(filename, Cmd, len);
b915fda3 1995
ec75f5c1 1996 FILE *f = fopen(filename, "r");
7fe9b0b7 1997 if (!f) {
b915fda3 1998 PrintAndLog("couldn't open '%s'", filename);
7fe9b0b7 1999 return 0;
2000 }
2001
2002 GraphTraceLen = 0;
2003 char line[80];
2004 while (fgets(line, sizeof (line), f)) {
2005 GraphBuffer[GraphTraceLen] = atoi(line);
2006 GraphTraceLen++;
2007 }
2008 fclose(f);
2009 PrintAndLog("loaded %d samples", GraphTraceLen);
2010 RepaintGraphWindow();
2011 return 0;
2012}
2013
2014int CmdLtrim(const char *Cmd)
2015{
2016 int ds = atoi(Cmd);
2017
2018 for (int i = ds; i < GraphTraceLen; ++i)
2019 GraphBuffer[i-ds] = GraphBuffer[i];
2020 GraphTraceLen -= ds;
2021
2022 RepaintGraphWindow();
2023 return 0;
2024}
ec75f5c1 2025
2026// trim graph to input argument length
9ec1416a 2027int CmdRtrim(const char *Cmd)
2028{
2029 int ds = atoi(Cmd);
2030
2031 GraphTraceLen = ds;
2032
2033 RepaintGraphWindow();
2034 return 0;
2035}
7fe9b0b7 2036
2037/*
2038 * Manchester demodulate a bitstream. The bitstream needs to be already in
2039 * the GraphBuffer as 0 and 1 values
2040 *
2041 * Give the clock rate as argument in order to help the sync - the algorithm
2042 * resyncs at each pulse anyway.
2043 *
2044 * Not optimized by any means, this is the 1st time I'm writing this type of
2045 * routine, feel free to improve...
2046 *
2047 * 1st argument: clock rate (as number of samples per clock rate)
2048 * Typical values can be 64, 32, 128...
2049 */
2050int CmdManchesterDemod(const char *Cmd)
2051{
2052 int i, j, invert= 0;
2053 int bit;
2054 int clock;
fddf220a 2055 int lastval = 0;
7fe9b0b7 2056 int low = 0;
2057 int high = 0;
2058 int hithigh, hitlow, first;
2059 int lc = 0;
2060 int bitidx = 0;
2061 int bit2idx = 0;
2062 int warnings = 0;
2063
2064 /* check if we're inverting output */
c6f1fb9d 2065 if (*Cmd == 'i')
7fe9b0b7 2066 {
2067 PrintAndLog("Inverting output");
2068 invert = 1;
fffad860 2069 ++Cmd;
7fe9b0b7 2070 do
2071 ++Cmd;
2072 while(*Cmd == ' '); // in case a 2nd argument was given
2073 }
2074
2075 /* Holds the decoded bitstream: each clock period contains 2 bits */
2076 /* later simplified to 1 bit after manchester decoding. */
2077 /* Add 10 bits to allow for noisy / uncertain traces without aborting */
2078 /* int BitStream[GraphTraceLen*2/clock+10]; */
2079
2080 /* But it does not work if compiling on WIndows: therefore we just allocate a */
2081 /* large array */
90e278d3 2082 uint8_t BitStream[MAX_GRAPH_TRACE_LEN] = {0};
7fe9b0b7 2083
2084 /* Detect high and lows */
2085 for (i = 0; i < GraphTraceLen; i++)
2086 {
2087 if (GraphBuffer[i] > high)
2088 high = GraphBuffer[i];
2089 else if (GraphBuffer[i] < low)
2090 low = GraphBuffer[i];
2091 }
2092
2093 /* Get our clock */
f3bf15e4 2094 clock = GetAskClock(Cmd, high, 1);
7fe9b0b7 2095
2096 int tolerance = clock/4;
2097
2098 /* Detect first transition */
2099 /* Lo-Hi (arbitrary) */
2100 /* skip to the first high */
2101 for (i= 0; i < GraphTraceLen; i++)
2102 if (GraphBuffer[i] == high)
2103 break;
2104 /* now look for the first low */
2105 for (; i < GraphTraceLen; i++)
2106 {
2107 if (GraphBuffer[i] == low)
2108 {
2109 lastval = i;
2110 break;
2111 }
2112 }
2113
2114 /* If we're not working with 1/0s, demod based off clock */
2115 if (high != 1)
2116 {
2117 bit = 0; /* We assume the 1st bit is zero, it may not be
2118 * the case: this routine (I think) has an init problem.
2119 * Ed.
2120 */
2121 for (; i < (int)(GraphTraceLen / clock); i++)
2122 {
2123 hithigh = 0;
2124 hitlow = 0;
2125 first = 1;
2126
2127 /* Find out if we hit both high and low peaks */
2128 for (j = 0; j < clock; j++)
2129 {
2130 if (GraphBuffer[(i * clock) + j] == high)
2131 hithigh = 1;
2132 else if (GraphBuffer[(i * clock) + j] == low)
2133 hitlow = 1;
2134
2135 /* it doesn't count if it's the first part of our read
2136 because it's really just trailing from the last sequence */
2137 if (first && (hithigh || hitlow))
2138 hithigh = hitlow = 0;
2139 else
2140 first = 0;
2141
2142 if (hithigh && hitlow)
2143 break;
2144 }
2145
2146 /* If we didn't hit both high and low peaks, we had a bit transition */
2147 if (!hithigh || !hitlow)
2148 bit ^= 1;
2149
2150 BitStream[bit2idx++] = bit ^ invert;
2151 }
2152 }
2153
2154 /* standard 1/0 bitstream */
2155 else
2156 {
2157
2158 /* Then detect duration between 2 successive transitions */
2159 for (bitidx = 1; i < GraphTraceLen; i++)
2160 {
2161 if (GraphBuffer[i-1] != GraphBuffer[i])
2162 {
b3b70669 2163 lc = i-lastval;
2164 lastval = i;
2165
2166 // Error check: if bitidx becomes too large, we do not
2167 // have a Manchester encoded bitstream or the clock is really
2168 // wrong!
2169 if (bitidx > (GraphTraceLen*2/clock+8) ) {
2170 PrintAndLog("Error: the clock you gave is probably wrong, aborting.");
2171 return 0;
2172 }
2173 // Then switch depending on lc length:
2174 // Tolerance is 1/4 of clock rate (arbitrary)
2175 if (abs(lc-clock/2) < tolerance) {
2176 // Short pulse : either "1" or "0"
2177 BitStream[bitidx++]=GraphBuffer[i-1];
2178 } else if (abs(lc-clock) < tolerance) {
2179 // Long pulse: either "11" or "00"
2180 BitStream[bitidx++]=GraphBuffer[i-1];
2181 BitStream[bitidx++]=GraphBuffer[i-1];
2182 } else {
7fe9b0b7 2183 // Error
2184 warnings++;
b3b70669 2185 PrintAndLog("Warning: Manchester decode error for pulse width detection.");
2186 PrintAndLog("(too many of those messages mean either the stream is not Manchester encoded, or clock is wrong)");
7fe9b0b7 2187
2188 if (warnings > 10)
2189 {
2190 PrintAndLog("Error: too many detection errors, aborting.");
2191 return 0;
2192 }
2193 }
2194 }
2195 }
2196
2197 // At this stage, we now have a bitstream of "01" ("1") or "10" ("0"), parse it into final decoded bitstream
2198 // Actually, we overwrite BitStream with the new decoded bitstream, we just need to be careful
2199 // to stop output at the final bitidx2 value, not bitidx
2200 for (i = 0; i < bitidx; i += 2) {
2201 if ((BitStream[i] == 0) && (BitStream[i+1] == 1)) {
2202 BitStream[bit2idx++] = 1 ^ invert;
b3b70669 2203 } else if ((BitStream[i] == 1) && (BitStream[i+1] == 0)) {
2204 BitStream[bit2idx++] = 0 ^ invert;
2205 } else {
2206 // We cannot end up in this state, this means we are unsynchronized,
2207 // move up 1 bit:
2208 i++;
7fe9b0b7 2209 warnings++;
b3b70669 2210 PrintAndLog("Unsynchronized, resync...");
2211 PrintAndLog("(too many of those messages mean the stream is not Manchester encoded)");
7fe9b0b7 2212
2213 if (warnings > 10)
2214 {
2215 PrintAndLog("Error: too many decode errors, aborting.");
2216 return 0;
2217 }
2218 }
2219 }
2220 }
2221
2222 PrintAndLog("Manchester decoded bitstream");
2223 // Now output the bitstream to the scrollback by line of 16 bits
2224 for (i = 0; i < (bit2idx-16); i+=16) {
2225 PrintAndLog("%i %i %i %i %i %i %i %i %i %i %i %i %i %i %i %i",
2226 BitStream[i],
2227 BitStream[i+1],
2228 BitStream[i+2],
2229 BitStream[i+3],
2230 BitStream[i+4],
2231 BitStream[i+5],
2232 BitStream[i+6],
2233 BitStream[i+7],
2234 BitStream[i+8],
2235 BitStream[i+9],
2236 BitStream[i+10],
2237 BitStream[i+11],
2238 BitStream[i+12],
2239 BitStream[i+13],
2240 BitStream[i+14],
2241 BitStream[i+15]);
2242 }
2243 return 0;
2244}
2245
2246/* Modulate our data into manchester */
2247int CmdManchesterMod(const char *Cmd)
2248{
2249 int i, j;
2250 int clock;
2251 int bit, lastbit, wave;
2252
2253 /* Get our clock */
f3bf15e4 2254 clock = GetAskClock(Cmd, 0, 1);
7fe9b0b7 2255
2256 wave = 0;
2257 lastbit = 1;
2258 for (i = 0; i < (int)(GraphTraceLen / clock); i++)
2259 {
2260 bit = GraphBuffer[i * clock] ^ 1;
2261
2262 for (j = 0; j < (int)(clock/2); j++)
2263 GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave;
2264 for (j = (int)(clock/2); j < clock; j++)
2265 GraphBuffer[(i * clock) + j] = bit ^ lastbit ^ wave ^ 1;
2266
2267 /* Keep track of how we start our wave and if we changed or not this time */
2268 wave ^= bit ^ lastbit;
2269 lastbit = bit;
2270 }
2271
2272 RepaintGraphWindow();
2273 return 0;
2274}
2275
2276int CmdNorm(const char *Cmd)
2277{
2278 int i;
2279 int max = INT_MIN, min = INT_MAX;
2280
2281 for (i = 10; i < GraphTraceLen; ++i) {
2282 if (GraphBuffer[i] > max)
2283 max = GraphBuffer[i];
2284 if (GraphBuffer[i] < min)
2285 min = GraphBuffer[i];
2286 }
2287
2288 if (max != min) {
2289 for (i = 0; i < GraphTraceLen; ++i) {
ba1a299c 2290 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
7fe9b0b7 2291 (max - min);
ba1a299c 2292 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
7fe9b0b7 2293 }
2294 }
2295 RepaintGraphWindow();
2296 return 0;
2297}
2298
2299int CmdPlot(const char *Cmd)
2300{
2301 ShowGraphWindow();
2302 return 0;
2303}
2304
2305int CmdSave(const char *Cmd)
2306{
ec75f5c1 2307 char filename[FILE_PATH_SIZE] = {0x00};
2308 int len = 0;
b915fda3 2309
ec75f5c1 2310 len = strlen(Cmd);
2311 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
2312 memcpy(filename, Cmd, len);
b915fda3 2313
2314
2315 FILE *f = fopen(filename, "w");
7fe9b0b7 2316 if(!f) {
b915fda3 2317 PrintAndLog("couldn't open '%s'", filename);
7fe9b0b7 2318 return 0;
2319 }
2320 int i;
2321 for (i = 0; i < GraphTraceLen; i++) {
2322 fprintf(f, "%d\n", GraphBuffer[i]);
2323 }
2324 fclose(f);
2325 PrintAndLog("saved to '%s'", Cmd);
2326 return 0;
2327}
2328
2329int CmdScale(const char *Cmd)
2330{
2331 CursorScaleFactor = atoi(Cmd);
2332 if (CursorScaleFactor == 0) {
2333 PrintAndLog("bad, can't have zero scale");
2334 CursorScaleFactor = 1;
2335 }
2336 RepaintGraphWindow();
2337 return 0;
2338}
2339
2340int CmdThreshold(const char *Cmd)
2341{
2342 int threshold = atoi(Cmd);
2343
2344 for (int i = 0; i < GraphTraceLen; ++i) {
2345 if (GraphBuffer[i] >= threshold)
2346 GraphBuffer[i] = 1;
2347 else
7bb9d33e 2348 GraphBuffer[i] = -1;
7fe9b0b7 2349 }
2350 RepaintGraphWindow();
2351 return 0;
2352}
2353
d51b2eda
MHS
2354int CmdDirectionalThreshold(const char *Cmd)
2355{
b4fb11ba 2356 int8_t upThres = param_get8(Cmd, 0);
2357 int8_t downThres = param_get8(Cmd, 1);
ba1a299c 2358
d51b2eda 2359 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
952a8bb5 2360
d51b2eda
MHS
2361 int lastValue = GraphBuffer[0];
2362 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
952a8bb5 2363
d51b2eda
MHS
2364 for (int i = 1; i < GraphTraceLen; ++i) {
2365 // Apply first threshold to samples heading up
2366 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
2367 {
2368 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2369 GraphBuffer[i] = 1;
2370 }
2371 // Apply second threshold to samples heading down
2372 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
2373 {
2374 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2375 GraphBuffer[i] = -1;
2376 }
2377 else
2378 {
2379 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
2380 GraphBuffer[i] = GraphBuffer[i-1];
2381
2382 }
2383 }
2384 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
2385 RepaintGraphWindow();
2386 return 0;
2387}
2388
7fe9b0b7 2389int CmdZerocrossings(const char *Cmd)
2390{
2391 // Zero-crossings aren't meaningful unless the signal is zero-mean.
2392 CmdHpf("");
2393
2394 int sign = 1;
2395 int zc = 0;
2396 int lastZc = 0;
2397
2398 for (int i = 0; i < GraphTraceLen; ++i) {
2399 if (GraphBuffer[i] * sign >= 0) {
2400 // No change in sign, reproduce the previous sample count.
2401 zc++;
2402 GraphBuffer[i] = lastZc;
2403 } else {
2404 // Change in sign, reset the sample count.
2405 sign = -sign;
2406 GraphBuffer[i] = lastZc;
2407 if (sign > 0) {
2408 lastZc = zc;
2409 zc = 0;
2410 }
2411 }
2412 }
2413
2414 RepaintGraphWindow();
2415 return 0;
2416}
2417
ba1a299c 2418static command_t CommandTable[] =
7fe9b0b7 2419{
2420 {"help", CmdHelp, 1, "This help"},
2421 {"amp", CmdAmp, 1, "Amplify peaks"},
19ff0210 2422 //{"askdemod", Cmdaskdemod, 1, "<0 or 1> -- Attempt to demodulate simple ASK tags"},
cc2ea5ed 2423 {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using length of sample differences to detect the edge of a wave (default = 25)"},
2424 {"askem410xdemod",CmdAskEM410xDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Demodulate an EM410x tag from GraphBuffer (args optional)"},
19ff0210 2425 //{"askmandemod", Cmdaskmandemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate ASK/Manchester tags and output binary (args optional)"},
2426 //{"askrawdemod", Cmdaskrawdemod, 1, "[clock] [invert<0|1>] -- Attempt to demodulate ASK tags and output bin (args optional)"},
7fe9b0b7 2427 {"autocorr", CmdAutoCorr, 1, "<window length> -- Autocorrelation over window"},
cc2ea5ed 2428 {"biphaserawdecode",CmdBiphaseDecodeRaw,1,"[offset] [invert<0|1>] Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
7fe9b0b7 2429 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
19ff0210 2430 //{"bitstream", CmdBitstream, 1, "[clock rate] -- Convert waveform into a bitstream"},
7fe9b0b7 2431 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
2432 {"dec", CmdDec, 1, "Decimate samples"},
cc2ea5ed 2433 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
19ff0210 2434 //{"fskdemod", CmdFSKdemod, 1, "Demodulate graph window as a HID FSK"},
cc2ea5ed 2435 {"fskawiddemod", CmdFSKdemodAWID, 1, "Demodulate an AWID FSK tag from GraphBuffer"},
f3bf15e4 2436 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
cc2ea5ed 2437 {"fskhiddemod", CmdFSKdemodHID, 1, "Demodulate a HID FSK tag from GraphBuffer"},
2438 {"fskiodemod", CmdFSKdemodIO, 1, "Demodulate an IO Prox FSK tag from GraphBuffer"},
2439 {"fskpyramiddemod",CmdFSKdemodPyramid,1, "Demodulate a Pyramid FSK tag from GraphBuffer"},
2440 {"fskparadoxdemod",CmdFSKdemodParadox,1, "Demodulate a Paradox FSK tag from GraphBuffer"},
19ff0210 2441 //{"fskrawdemod", CmdFSKrawdemod, 1, "[clock rate] [invert] [rchigh] [rclow] Demodulate graph window from FSK to bin (clock = 50)(invert = 1|0)(rchigh = 10)(rclow=8)"},
7fe9b0b7 2442 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
b4fb11ba 2443 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
7fe9b0b7 2444 {"hide", CmdHide, 1, "Hide graph window"},
2445 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
7fe9b0b7 2446 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
2447 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
9ec1416a 2448 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
19ff0210 2449 //{"mandemod", CmdManchesterDemod, 1, "[i] [clock rate] -- Manchester demodulate binary stream (option 'i' to invert output)"},
cc2ea5ed 2450 {"manrawdecode", Cmdmandecoderaw, 1, "Manchester decode binary stream in DemodBuffer"},
7fe9b0b7 2451 {"manmod", CmdManchesterMod, 1, "[clock rate] -- Manchester modulate a binary stream"},
b4fb11ba 2452 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
f3bf15e4 2453 //{"nrzdetectclock",CmdDetectNRZClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"},
19ff0210 2454 //{"nrzrawdemod", CmdNRZrawDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate nrz tags and output binary (args optional)"},
7ddb9900 2455 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
f3bf15e4 2456 //{"pskdetectclock",CmdDetectPSKClockRate, 1, "Detect ASK, PSK, or NRZ clock rate"},
cc2ea5ed 2457 {"pskindalademod",CmdIndalaDecode, 1, "[clock] [invert<0|1>] -- Demodulate an indala tag (PSK1) from GraphBuffer (args optional)"},
19ff0210 2458 //{"psk1rawdemod", CmdPSK1rawDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate psk1 tags and output binary (args optional)"},
2459 //{"psk2rawdemod", CmdPSK2rawDemod, 1, "[clock] [invert<0|1>] [maxErr] -- Attempt to demodulate psk2 tags and output binary (args optional)"},
cc2ea5ed 2460 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
2461 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
7fe9b0b7 2462 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
2463 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
ec75f5c1 2464 {"setdebugmode", CmdSetDebugMode, 1, "<0|1> -- Turn on or off Debugging Mode for demods"},
2465 {"shiftgraphzero",CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
19ff0210 2466 //{"threshold", CmdThreshold, 1, "<threshold> -- Maximize/minimize every value in the graph window depending on threshold"},
b4fb11ba 2467 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
2468 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
19ff0210 2469 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
b4fb11ba 2470 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
7fe9b0b7 2471 {NULL, NULL, 0, NULL}
2472};
2473
2474int CmdData(const char *Cmd)
2475{
2476 CmdsParse(CommandTable, Cmd);
2477 return 0;
2478}
2479
2480int CmdHelp(const char *Cmd)
2481{
2482 CmdsHelp(CommandTable);
2483 return 0;
2484}
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