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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
6923d3f1 11#include <stdio.h> // also included in util.h
12#include <string.h> // also included in util.h
43534cba 13#include <inttypes.h>
6923d3f1 14#include <limits.h> // for CmdNorm INT_MIN && INT_MAX
15#include "data.h" // also included in util.h
16#include "cmddata.h"
d51b2eda 17#include "util.h"
7fe9b0b7 18#include "cmdmain.h"
6923d3f1 19#include "proxmark3.h"
20#include "ui.h" // for show graph controls
21#include "graph.h" // for graph data
22#include "cmdparser.h"// already included in cmdmain.h
23#include "usb_cmd.h" // already included in cmdmain.h and proxmark3.h
24#include "lfdemod.h" // for demod code
25#include "crc.h" // for pyramid checksum maxim
26#include "crc16.h" // for FDXB demod checksum
27#include "loclass/cipherutils.h" // for decimating samples in getsamples
35aa230e 28#include "cmdlfem4x.h"// for em410x demod
31abe49f 29
4118b74d 30uint8_t DemodBuffer[MAX_DEMOD_BUF_LEN];
b362de62 31uint8_t g_debugMode=0;
32size_t DemodBufferLen=0;
cb86f8d6 33//size_t g_demodStartIdx=0;
34//uint8_t g_demodClock=0;
127f1490 35
7fe9b0b7 36static int CmdHelp(const char *Cmd);
37
4118b74d 38//set the demod buffer with given array of binary (one bit per byte)
39//by marshmellow
ec75f5c1 40void setDemodBuf(uint8_t *buff, size_t size, size_t startIdx)
4118b74d 41{
13d77ef9 42 if (buff == NULL)
43 return;
44
45 if ( size >= MAX_DEMOD_BUF_LEN)
46 size = MAX_DEMOD_BUF_LEN;
47
ec75f5c1 48 size_t i = 0;
8e2e6c8e 49 for (; i < size; i++){
ec75f5c1 50 DemodBuffer[i]=buff[startIdx++];
ba1a299c 51 }
52 DemodBufferLen=size;
53 return;
4118b74d 54}
55
ec75f5c1 56int CmdSetDebugMode(const char *Cmd)
57{
e0165dcf 58 int demod=0;
59 sscanf(Cmd, "%i", &demod);
60 g_debugMode=(uint8_t)demod;
61 return 1;
ec75f5c1 62}
63
979bba37 64int usage_data_printdemodbuf(){
ace26dbd 65 PrintAndLog("Usage: data printdemodbuffer x o <offset> l <length>");
979bba37 66 PrintAndLog("Options: ");
67 PrintAndLog(" h This help");
68 PrintAndLog(" x output in hex (omit for binary output)");
69 PrintAndLog(" o <offset> enter offset in # of bits");
ace26dbd 70 PrintAndLog(" l <length> enter length to print in # of bits or hex characters respectively");
979bba37 71 return 0;
72}
73
4118b74d 74//by marshmellow
abd6112f 75void printDemodBuff(void)
4118b74d 76{
ba1a299c 77 int bitLen = DemodBufferLen;
2767fc02 78 if (bitLen<1) {
ba1a299c 79 PrintAndLog("no bits found in demod buffer");
80 return;
81 }
82 if (bitLen>512) bitLen=512; //max output to 512 bits if we have more - should be plenty
e0165dcf 83
2767fc02 84 char *bin = sprint_bin_break(DemodBuffer,bitLen,16);
85 PrintAndLog("%s",bin);
86
ba1a299c 87 return;
4118b74d 88}
89
8d960002 90int CmdPrintDemodBuff(const char *Cmd)
91{
979bba37 92 char hex[512]={0x00};
93 bool hexMode = false;
94 bool errors = false;
ace26dbd 95 uint32_t offset = 0; //could be size_t but no param_get16...
96 uint32_t length = 512;
979bba37 97 char cmdp = 0;
98 while(param_getchar(Cmd, cmdp) != 0x00)
99 {
100 switch(param_getchar(Cmd, cmdp))
101 {
102 case 'h':
103 case 'H':
104 return usage_data_printdemodbuf();
105 case 'x':
106 case 'X':
107 hexMode = true;
108 cmdp++;
109 break;
110 case 'o':
111 case 'O':
ace26dbd 112 offset = param_get32ex(Cmd, cmdp+1, 0, 10);
979bba37 113 if (!offset) errors = true;
114 cmdp += 2;
115 break;
ace26dbd 116 case 'l':
117 case 'L':
118 length = param_get32ex(Cmd, cmdp+1, 512, 10);
119 if (!length) errors = true;
120 cmdp += 2;
121 break;
979bba37 122 default:
123 PrintAndLog("Unknown parameter '%c'", param_getchar(Cmd, cmdp));
124 errors = true;
125 break;
126 }
127 if(errors) break;
e0165dcf 128 }
979bba37 129 //Validations
130 if(errors) return usage_data_printdemodbuf();
ace26dbd 131 length = (length > (DemodBufferLen-offset)) ? DemodBufferLen-offset : length;
132 int numBits = (length) & 0x00FFC; //make sure we don't exceed our string
979bba37 133
134 if (hexMode){
185e038c 135 char *buf = (char *) (DemodBuffer + offset);
ace26dbd 136 numBits = (numBits > sizeof(hex)) ? sizeof(hex) : numBits;
979bba37 137 numBits = binarraytohex(hex, buf, numBits);
e0165dcf 138 if (numBits==0) return 0;
979bba37 139 PrintAndLog("DemodBuffer: %s",hex);
e0165dcf 140 } else {
709665b5 141 PrintAndLog("DemodBuffer:\n%s", sprint_bin_break(DemodBuffer+offset,numBits,16));
e0165dcf 142 }
143 return 1;
8d960002 144}
7fe9b0b7 145
2767fc02 146//by marshmellow
78f5b1a7 147//this function strictly converts >1 to 1 and <1 to 0 for each sample in the graphbuffer
148int CmdGetBitStream(const char *Cmd)
149{
e0165dcf 150 int i;
151 CmdHpf(Cmd);
152 for (i = 0; i < GraphTraceLen; i++) {
153 if (GraphBuffer[i] >= 1) {
154 GraphBuffer[i] = 1;
155 } else {
156 GraphBuffer[i] = 0;
157 }
158 }
159 RepaintGraphWindow();
160 return 0;
78f5b1a7 161}
162
fef74fdc 163//by marshmellow
164//Cmd Args: Clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
165// (amp may not be needed anymore)
166//verbose will print results and demoding messages
167//emSearch will auto search for EM410x format in bitstream
168//askType switches decode: ask/raw = 0, ask/manchester = 1
d1869c33 169int ASKDemod_ext(const char *Cmd, bool verbose, bool emSearch, uint8_t askType, bool *stCheck) {
e0165dcf 170 int invert=0;
171 int clk=0;
172 int maxErr=100;
fef74fdc 173 int maxLen=0;
01d0f8ae 174 uint8_t askamp = 0;
fef74fdc 175 char amp = param_getchar(Cmd, 0);
e0165dcf 176 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
fef74fdc 177 sscanf(Cmd, "%i %i %i %i %c", &clk, &invert, &maxErr, &maxLen, &amp);
ace26dbd 178 if (!maxLen) maxLen = BIGBUF_SIZE;
e0165dcf 179 if (invert != 0 && invert != 1) {
180 PrintAndLog("Invalid argument: %s", Cmd);
181 return 0;
182 }
183 if (clk==1){
184 invert=1;
185 clk=0;
186 }
187 size_t BitLen = getFromGraphBuf(BitStream);
2767fc02 188 if (g_debugMode) PrintAndLog("DEBUG: Bitlen from grphbuff: %d",BitLen);
d1869c33 189 if (BitLen < 255) return 0;
190 if (maxLen < BitLen && maxLen != 0) BitLen = maxLen;
191 int foundclk = 0;
01d0f8ae 192 //amp before ST check
193 if (amp == 'a' || amp == 'A') {
194 askAmp(BitStream, BitLen);
195 }
d1869c33 196 bool st = false;
ab812dfa 197 size_t ststart = 0, stend = 0;
198 if (*stCheck) st = DetectST_ext(BitStream, &BitLen, &foundclk, &ststart, &stend);
d1869c33 199 if (st) {
200 *stCheck = st;
201 clk = (clk == 0) ? foundclk : clk;
ab812dfa 202 CursorCPos = ststart;
203 CursorDPos = stend;
f75b313b 204 if (verbose || g_debugMode) PrintAndLog("\nFound Sequence Terminator - First one is shown by orange and blue graph markers");
d1869c33 205 }
01d0f8ae 206 int errCnt = askdemod(BitStream, &BitLen, &clk, &invert, maxErr, askamp, askType);
fef74fdc 207 if (errCnt<0 || BitLen<16){ //if fatal error (or -1)
2767fc02 208 if (g_debugMode) PrintAndLog("DEBUG: no data found %d, errors:%d, bitlen:%d, clock:%d",errCnt,invert,BitLen,clk);
e0165dcf 209 return 0;
210 }
d1869c33 211 if (errCnt > maxErr){
2767fc02 212 if (g_debugMode) PrintAndLog("DEBUG: Too many errors found, errors:%d, bits:%d, clock:%d",errCnt, BitLen, clk);
213 return 0;
214 }
215 if (verbose || g_debugMode) PrintAndLog("\nUsing Clock:%d, Invert:%d, Bits Found:%d",clk,invert,BitLen);
e0165dcf 216
217 //output
e0165dcf 218 setDemodBuf(BitStream,BitLen,0);
fef74fdc 219 if (verbose || g_debugMode){
220 if (errCnt>0) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
8e2e6c8e 221 if (askType) PrintAndLog("ASK/Manchester - Clock: %d - Decoded bitstream:",clk);
222 else PrintAndLog("ASK/Raw - Clock: %d - Decoded bitstream:",clk);
fef74fdc 223 // Now output the bitstream to the scrollback by line of 16 bits
224 printDemodBuff();
225
226 }
227 uint64_t lo = 0;
228 uint32_t hi = 0;
e0165dcf 229 if (emSearch){
fef74fdc 230 AskEm410xDecode(true, &hi, &lo);
e0165dcf 231 }
232 return 1;
eb191de6 233}
d1869c33 234int ASKDemod(const char *Cmd, bool verbose, bool emSearch, uint8_t askType) {
235 bool st = false;
236 return ASKDemod_ext(Cmd, verbose, emSearch, askType, &st);
237}
eb191de6 238
4ac906d1 239//by marshmellow
fef74fdc 240//takes 5 arguments - clock, invert, maxErr, maxLen as integers and amplify as char == 'a'
4ac906d1 241//attempts to demodulate ask while decoding manchester
242//prints binary found and saves in graphbuffer for further commands
243int Cmdaskmandemod(const char *Cmd)
244{
e0165dcf 245 char cmdp = param_getchar(Cmd, 0);
01d0f8ae 246 if (strlen(Cmd) > 45 || cmdp == 'h' || cmdp == 'H') {
d1869c33 247 PrintAndLog("Usage: data rawdemod am <s> [clock] <invert> [maxError] [maxLen] [amplify]");
248 PrintAndLog(" ['s'] optional, check for Sequence Terminator");
fef74fdc 249 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
250 PrintAndLog(" <invert>, 1 to invert output");
251 PrintAndLog(" [set maximum allowed errors], default = 100");
252 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
253 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
e0165dcf 254 PrintAndLog("");
255 PrintAndLog(" sample: data rawdemod am = demod an ask/manchester tag from GraphBuffer");
256 PrintAndLog(" : data rawdemod am 32 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32");
257 PrintAndLog(" : data rawdemod am 32 1 = demod an ask/manchester tag from GraphBuffer using a clock of RF/32 and inverting data");
258 PrintAndLog(" : data rawdemod am 1 = demod an ask/manchester tag from GraphBuffer while inverting data");
259 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");
260 return 0;
261 }
7cb8516c 262 bool st = true;
d1869c33 263 if (Cmd[0]=='s')
7cb8516c 264 return ASKDemod_ext(Cmd++, true, true, 1, &st);
d1869c33 265 else if (Cmd[1] == 's')
7cb8516c 266 return ASKDemod_ext(Cmd+=2, true, true, 1, &st);
d1869c33 267 else
7cb8516c 268 return ASKDemod(Cmd, true, true, 1);
4ac906d1 269}
270
eb191de6 271//by marshmellow
d5a72d2f 272//manchester decode
eb191de6 273//stricktly take 10 and 01 and convert to 0 and 1
274int Cmdmandecoderaw(const char *Cmd)
275{
e0165dcf 276 int i =0;
277 int errCnt=0;
278 size_t size=0;
fef74fdc 279 int invert=0;
6ac4cb27 280 int maxErr = 20;
e0165dcf 281 char cmdp = param_getchar(Cmd, 0);
1f918317 282 if (strlen(Cmd) > 5 || cmdp == 'h' || cmdp == 'H') {
fef74fdc 283 PrintAndLog("Usage: data manrawdecode [invert] [maxErr]");
e0165dcf 284 PrintAndLog(" Takes 10 and 01 and converts to 0 and 1 respectively");
285 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
fef74fdc 286 PrintAndLog(" [invert] invert output");
1f918317 287 PrintAndLog(" [maxErr] set number of errors allowed (default = 20)");
e0165dcf 288 PrintAndLog("");
289 PrintAndLog(" sample: data manrawdecode = decode manchester bitstream from the demodbuffer");
290 return 0;
291 }
292 if (DemodBufferLen==0) return 0;
293 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
294 int high=0,low=0;
295 for (;i<DemodBufferLen;++i){
296 if (DemodBuffer[i]>high) high=DemodBuffer[i];
297 else if(DemodBuffer[i]<low) low=DemodBuffer[i];
298 BitStream[i]=DemodBuffer[i];
299 }
1f918317 300 if (high>7 || low <0 ){
2767fc02 301 PrintAndLog("Error: please raw demod the wave first then manchester raw decode");
e0165dcf 302 return 0;
303 }
1f918317 304
fef74fdc 305 sscanf(Cmd, "%i %i", &invert, &maxErr);
e0165dcf 306 size=i;
127f1490 307 uint8_t alignPos = 0;
308 errCnt=manrawdecode(BitStream, &size, invert, &alignPos);
e0165dcf 309 if (errCnt>=maxErr){
310 PrintAndLog("Too many errors: %d",errCnt);
311 return 0;
312 }
313 PrintAndLog("Manchester Decoded - # errors:%d - data:",errCnt);
2767fc02 314 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
e0165dcf 315 if (errCnt==0){
316 uint64_t id = 0;
317 uint32_t hi = 0;
318 size_t idx=0;
319 if (Em410xDecode(BitStream, &size, &idx, &hi, &id)){
320 //need to adjust to set bitstream back to manchester encoded data
321 //setDemodBuf(BitStream, size, idx);
322
323 printEM410x(hi, id);
324 }
325 }
326 return 1;
d5a72d2f 327}
328
329//by marshmellow
330//biphase decode
331//take 01 or 10 = 0 and 11 or 00 = 1
1e090a61 332//takes 2 arguments "offset" default = 0 if 1 it will shift the decode by one bit
333// and "invert" default = 0 if 1 it will invert output
2767fc02 334// the argument offset allows us to manually shift if the output is incorrect - [EDIT: now auto detects]
d5a72d2f 335int CmdBiphaseDecodeRaw(const char *Cmd)
336{
ba1a299c 337 size_t size=0;
b41534d1 338 int offset=0, invert=0, maxErr=20, errCnt=0;
b4fb11ba 339 char cmdp = param_getchar(Cmd, 0);
340 if (strlen(Cmd) > 3 || cmdp == 'h' || cmdp == 'H') {
b41534d1 341 PrintAndLog("Usage: data biphaserawdecode [offset] [invert] [maxErr]");
342 PrintAndLog(" Converts 10 or 01 to 1 and 11 or 00 to 0");
b4fb11ba 343 PrintAndLog(" --must have binary sequence in demodbuffer (run data askrawdemod first)");
e0165dcf 344 PrintAndLog(" --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
b4fb11ba 345 PrintAndLog("");
346 PrintAndLog(" [offset <0|1>], set to 0 not to adjust start position or to 1 to adjust decode start position");
347 PrintAndLog(" [invert <0|1>], set to 1 to invert output");
b41534d1 348 PrintAndLog(" [maxErr int], set max errors tolerated - default=20");
b4fb11ba 349 PrintAndLog("");
350 PrintAndLog(" sample: data biphaserawdecode = decode biphase bitstream from the demodbuffer");
351 PrintAndLog(" sample: data biphaserawdecode 1 1 = decode biphase bitstream from the demodbuffer, set offset, and invert output");
352 return 0;
353 }
b41534d1 354 sscanf(Cmd, "%i %i %i", &offset, &invert, &maxErr);
355 if (DemodBufferLen==0){
356 PrintAndLog("DemodBuffer Empty - run 'data rawdemod ar' first");
b4fb11ba 357 return 0;
358 }
b41534d1 359 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
360 memcpy(BitStream, DemodBuffer, DemodBufferLen);
361 size = DemodBufferLen;
1e090a61 362 errCnt=BiphaseRawDecode(BitStream, &size, offset, invert);
b41534d1 363 if (errCnt<0){
364 PrintAndLog("Error during decode:%d", errCnt);
365 return 0;
366 }
367 if (errCnt>maxErr){
b4fb11ba 368 PrintAndLog("Too many errors attempting to decode: %d",errCnt);
369 return 0;
370 }
b41534d1 371
372 if (errCnt>0){
2767fc02 373 PrintAndLog("# Errors found during Demod (shown as 7 in bit stream): %d",errCnt);
b41534d1 374 }
375 PrintAndLog("Biphase Decoded using offset: %d - # invert:%d - data:",offset,invert);
2767fc02 376 PrintAndLog("%s", sprint_bin_break(BitStream, size, 16));
b41534d1 377
378 if (offset) setDemodBuf(DemodBuffer,DemodBufferLen-offset, offset); //remove first bit from raw demod
b4fb11ba 379 return 1;
eb191de6 380}
381
b41534d1 382//by marshmellow
383// - ASK Demod then Biphase decode GraphBuffer samples
384int ASKbiphaseDemod(const char *Cmd, bool verbose)
385{
386 //ask raw demod GraphBuffer first
c7d67212 387 int offset=0, clk=0, invert=0, maxErr=0;
388 sscanf(Cmd, "%i %i %i %i", &offset, &clk, &invert, &maxErr);
b41534d1 389
8e2e6c8e 390 uint8_t BitStream[MAX_DEMOD_BUF_LEN];
391 size_t size = getFromGraphBuf(BitStream);
fd227f4e 392 //invert here inverts the ask raw demoded bits which has no effect on the demod, but we need the pointer
c7d67212 393 int errCnt = askdemod(BitStream, &size, &clk, &invert, maxErr, 0, 0);
8e2e6c8e 394 if ( errCnt < 0 || errCnt > maxErr ) {
395 if (g_debugMode) PrintAndLog("DEBUG: no data or error found %d, clock: %d", errCnt, clk);
396 return 0;
397 }
398
399 //attempt to Biphase decode BitStream
400 errCnt = BiphaseRawDecode(BitStream, &size, offset, invert);
b41534d1 401 if (errCnt < 0){
402 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode: %d", errCnt);
403 return 0;
404 }
405 if (errCnt > maxErr) {
406 if (g_debugMode || verbose) PrintAndLog("Error BiphaseRawDecode too many errors: %d", errCnt);
407 return 0;
408 }
409 //success set DemodBuffer and return
410 setDemodBuf(BitStream, size, 0);
411 if (g_debugMode || verbose){
8e2e6c8e 412 PrintAndLog("Biphase Decoded using offset: %d - clock: %d - # errors:%d - data:",offset,clk,errCnt);
b41534d1 413 printDemodBuff();
414 }
415 return 1;
416}
417//by marshmellow - see ASKbiphaseDemod
418int Cmdaskbiphdemod(const char *Cmd)
419{
e0165dcf 420 char cmdp = param_getchar(Cmd, 0);
fef74fdc 421 if (strlen(Cmd) > 25 || cmdp == 'h' || cmdp == 'H') {
422 PrintAndLog("Usage: data rawdemod ab [offset] [clock] <invert> [maxError] [maxLen] <amplify>");
e0165dcf 423 PrintAndLog(" [offset], offset to begin biphase, default=0");
424 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
425 PrintAndLog(" <invert>, 1 to invert output");
426 PrintAndLog(" [set maximum allowed errors], default = 100");
fef74fdc 427 PrintAndLog(" [set maximum Samples to read], default = 32768 (512 bits at rf/64)");
e0165dcf 428 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
429 PrintAndLog(" NOTE: <invert> can be entered as second or third argument");
430 PrintAndLog(" NOTE: <amplify> can be entered as first, second or last argument");
431 PrintAndLog(" NOTE: any other arg must have previous args set to work");
432 PrintAndLog("");
433 PrintAndLog(" NOTE: --invert for Conditional Dephase Encoding (CDP) AKA Differential Manchester");
434 PrintAndLog("");
fef74fdc 435 PrintAndLog(" sample: data rawdemod ab = demod an ask/biph tag from GraphBuffer");
436 PrintAndLog(" : data rawdemod ab 0 a = demod an ask/biph tag from GraphBuffer, amplified");
437 PrintAndLog(" : data rawdemod ab 1 32 = demod an ask/biph tag from GraphBuffer using an offset of 1 and a clock of RF/32");
438 PrintAndLog(" : data rawdemod ab 0 32 1 = demod an ask/biph tag from GraphBuffer using a clock of RF/32 and inverting data");
439 PrintAndLog(" : data rawdemod ab 0 1 = demod an ask/biph tag from GraphBuffer while inverting data");
440 PrintAndLog(" : data rawdemod ab 0 64 1 0 = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
441 PrintAndLog(" : data rawdemod ab 0 64 1 0 0 a = demod an ask/biph tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
e0165dcf 442 return 0;
443 }
7cb8516c 444 return ASKbiphaseDemod(Cmd, true);
b41534d1 445}
446
fef74fdc 447//by marshmellow - see ASKDemod
4ac906d1 448int Cmdaskrawdemod(const char *Cmd)
449{
e0165dcf 450 char cmdp = param_getchar(Cmd, 0);
01d0f8ae 451 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H') {
fef74fdc 452 PrintAndLog("Usage: data rawdemod ar [clock] <invert> [maxError] [maxLen] [amplify]");
e0165dcf 453 PrintAndLog(" [set clock as integer] optional, if not set, autodetect");
454 PrintAndLog(" <invert>, 1 to invert output");
455 PrintAndLog(" [set maximum allowed errors], default = 100");
fef74fdc 456 PrintAndLog(" [set maximum Samples to read], default = 32768 (1024 bits at rf/64)");
e0165dcf 457 PrintAndLog(" <amplify>, 'a' to attempt demod with ask amplification, default = no amp");
458 PrintAndLog("");
fef74fdc 459 PrintAndLog(" sample: data rawdemod ar = demod an ask tag from GraphBuffer");
460 PrintAndLog(" : data rawdemod ar a = demod an ask tag from GraphBuffer, amplified");
461 PrintAndLog(" : data rawdemod ar 32 = demod an ask tag from GraphBuffer using a clock of RF/32");
462 PrintAndLog(" : data rawdemod ar 32 1 = demod an ask tag from GraphBuffer using a clock of RF/32 and inverting data");
463 PrintAndLog(" : data rawdemod ar 1 = demod an ask tag from GraphBuffer while inverting data");
464 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");
465 PrintAndLog(" : data rawdemod ar 64 1 0 0 a = demod an ask tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors, and amp");
e0165dcf 466 return 0;
467 }
7cb8516c 468 return ASKDemod(Cmd, true, false, 0);
4ac906d1 469}
470
73d04bb4 471int AutoCorrelate(int window, bool SaveGrph, bool verbose)
7fe9b0b7 472{
e0165dcf 473 static int CorrelBuffer[MAX_GRAPH_TRACE_LEN];
474 size_t Correlation = 0;
475 int maxSum = 0;
476 int lastMax = 0;
477 if (verbose) PrintAndLog("performing %d correlations", GraphTraceLen - window);
478 for (int i = 0; i < GraphTraceLen - window; ++i) {
479 int sum = 0;
480 for (int j = 0; j < window; ++j) {
481 sum += (GraphBuffer[j]*GraphBuffer[i + j]) / 256;
482 }
483 CorrelBuffer[i] = sum;
484 if (sum >= maxSum-100 && sum <= maxSum+100){
485 //another max
486 Correlation = i-lastMax;
487 lastMax = i;
488 if (sum > maxSum) maxSum = sum;
489 } else if (sum > maxSum){
490 maxSum=sum;
491 lastMax = i;
492 }
493 }
494 if (Correlation==0){
495 //try again with wider margin
496 for (int i = 0; i < GraphTraceLen - window; i++){
497 if (CorrelBuffer[i] >= maxSum-(maxSum*0.05) && CorrelBuffer[i] <= maxSum+(maxSum*0.05)){
498 //another max
499 Correlation = i-lastMax;
500 lastMax = i;
501 //if (CorrelBuffer[i] > maxSum) maxSum = sum;
502 }
503 }
504 }
505 if (verbose && Correlation > 0) PrintAndLog("Possible Correlation: %d samples",Correlation);
506
507 if (SaveGrph){
508 GraphTraceLen = GraphTraceLen - window;
509 memcpy(GraphBuffer, CorrelBuffer, GraphTraceLen * sizeof (int));
510 RepaintGraphWindow();
511 }
512 return Correlation;
73d04bb4 513}
7fe9b0b7 514
9f7bbd24 515int usage_data_autocorr(void)
516{
e0165dcf 517 //print help
518 PrintAndLog("Usage: data autocorr [window] [g]");
519 PrintAndLog("Options: ");
520 PrintAndLog(" h This help");
521 PrintAndLog(" [window] window length for correlation - default = 4000");
522 PrintAndLog(" g save back to GraphBuffer (overwrite)");
523 return 0;
9f7bbd24 524}
525
73d04bb4 526int CmdAutoCorr(const char *Cmd)
527{
e0165dcf 528 char cmdp = param_getchar(Cmd, 0);
529 if (cmdp == 'h' || cmdp == 'H')
530 return usage_data_autocorr();
531 int window = 4000; //set default
532 char grph=0;
7cb8516c 533 bool updateGrph = false;
e0165dcf 534 sscanf(Cmd, "%i %c", &window, &grph);
535
536 if (window >= GraphTraceLen) {
537 PrintAndLog("window must be smaller than trace (%d samples)",
538 GraphTraceLen);
539 return 0;
540 }
7cb8516c 541 if (grph == 'g') updateGrph=true;
542 return AutoCorrelate(window, updateGrph, true);
7fe9b0b7 543}
544
545int CmdBitsamples(const char *Cmd)
546{
e0165dcf 547 int cnt = 0;
548 uint8_t got[12288];
952a8bb5 549
e0165dcf 550 GetFromBigBuf(got,sizeof(got),0);
551 WaitForResponse(CMD_ACK,NULL);
7fe9b0b7 552
e0165dcf 553 for (int j = 0; j < sizeof(got); j++) {
554 for (int k = 0; k < 8; k++) {
555 if(got[j] & (1 << (7 - k))) {
556 GraphBuffer[cnt++] = 1;
557 } else {
558 GraphBuffer[cnt++] = 0;
559 }
560 }
561 }
562 GraphTraceLen = cnt;
563 RepaintGraphWindow();
564 return 0;
7fe9b0b7 565}
566
7fe9b0b7 567int CmdBuffClear(const char *Cmd)
568{
e0165dcf 569 UsbCommand c = {CMD_BUFF_CLEAR};
570 SendCommand(&c);
571 ClearGraph(true);
572 return 0;
7fe9b0b7 573}
574
575int CmdDec(const char *Cmd)
576{
e0165dcf 577 for (int i = 0; i < (GraphTraceLen / 2); ++i)
578 GraphBuffer[i] = GraphBuffer[i * 2];
579 GraphTraceLen /= 2;
580 PrintAndLog("decimated by 2");
581 RepaintGraphWindow();
582 return 0;
7fe9b0b7 583}
698b649e
MHS
584/**
585 * Undecimate - I'd call it 'interpolate', but we'll save that
586 * name until someone does an actual interpolation command, not just
587 * blindly repeating samples
588 * @param Cmd
589 * @return
590 */
591int CmdUndec(const char *Cmd)
592{
c856ceae
MHS
593 if(param_getchar(Cmd, 0) == 'h')
594 {
595 PrintAndLog("Usage: data undec [factor]");
596 PrintAndLog("This function performs un-decimation, by repeating each sample N times");
597 PrintAndLog("Options: ");
598 PrintAndLog(" h This help");
599 PrintAndLog(" factor The number of times to repeat each sample.[default:2]");
600 PrintAndLog("Example: 'data undec 3'");
601 return 0;
602 }
603
604 uint8_t factor = param_get8ex(Cmd, 0,2, 10);
698b649e
MHS
605 //We have memory, don't we?
606 int swap[MAX_GRAPH_TRACE_LEN] = { 0 };
72c5877a 607 uint32_t g_index = 0, s_index = 0;
608 while(g_index < GraphTraceLen && s_index + factor < MAX_GRAPH_TRACE_LEN)
698b649e 609 {
c856ceae 610 int count = 0;
72c5877a 611 for(count = 0; count < factor && s_index + count < MAX_GRAPH_TRACE_LEN; count++)
c856ceae 612 swap[s_index+count] = GraphBuffer[g_index];
72c5877a 613
614 s_index += count;
615 g_index++;
698b649e 616 }
698b649e 617
72c5877a 618 memcpy(GraphBuffer, swap, s_index * sizeof(int));
c856ceae
MHS
619 GraphTraceLen = s_index;
620 RepaintGraphWindow();
698b649e
MHS
621 return 0;
622}
7fe9b0b7 623
ec75f5c1 624//by marshmellow
625//shift graph zero up or down based on input + or -
626int CmdGraphShiftZero(const char *Cmd)
627{
628
e0165dcf 629 int shift=0;
630 //set options from parameters entered with the command
631 sscanf(Cmd, "%i", &shift);
632 int shiftedVal=0;
633 for(int i = 0; i<GraphTraceLen; i++){
634 shiftedVal=GraphBuffer[i]+shift;
635 if (shiftedVal>127)
636 shiftedVal=127;
637 else if (shiftedVal<-127)
638 shiftedVal=-127;
639 GraphBuffer[i]= shiftedVal;
640 }
641 CmdNorm("");
642 return 0;
ec75f5c1 643}
644
6de43508 645//by marshmellow
646//use large jumps in read samples to identify edges of waves and then amplify that wave to max
2767fc02 647//similar to dirtheshold, threshold commands
6de43508 648//takes a threshold length which is the measured length between two samples then determines an edge
649int CmdAskEdgeDetect(const char *Cmd)
650{
e0165dcf 651 int thresLen = 25;
de53156e 652 int Last = 0;
e0165dcf 653 sscanf(Cmd, "%i", &thresLen);
49bbc60a 654
e0165dcf 655 for(int i = 1; i<GraphTraceLen; i++){
656 if (GraphBuffer[i]-GraphBuffer[i-1]>=thresLen) //large jump up
de53156e 657 Last = 127;
e0165dcf 658 else if(GraphBuffer[i]-GraphBuffer[i-1]<=-1*thresLen) //large jump down
de53156e 659 Last = -127;
660 GraphBuffer[i-1] = Last;
e0165dcf 661 }
662 RepaintGraphWindow();
e0165dcf 663 return 0;
6de43508 664}
665
7fe9b0b7 666/* Print our clock rate */
ba1a299c 667// uses data from graphbuffer
f3bf15e4 668// adjusted to take char parameter for type of modulation to find the clock - by marshmellow.
7fe9b0b7 669int CmdDetectClockRate(const char *Cmd)
670{
f3bf15e4 671 char cmdp = param_getchar(Cmd, 0);
fef74fdc 672 if (strlen(Cmd) > 6 || strlen(Cmd) == 0 || cmdp == 'h' || cmdp == 'H') {
673 PrintAndLog("Usage: data detectclock [modulation] <clock>");
f3bf15e4 674 PrintAndLog(" [modulation as char], specify the modulation type you want to detect the clock of");
fef74fdc 675 PrintAndLog(" <clock> , specify the clock (optional - to get best start position only)");
f3bf15e4 676 PrintAndLog(" 'a' = ask, 'f' = fsk, 'n' = nrz/direct, 'p' = psk");
677 PrintAndLog("");
678 PrintAndLog(" sample: data detectclock a = detect the clock of an ask modulated wave in the GraphBuffer");
679 PrintAndLog(" data detectclock f = detect the clock of an fsk modulated wave in the GraphBuffer");
680 PrintAndLog(" data detectclock p = detect the clock of an psk modulated wave in the GraphBuffer");
681 PrintAndLog(" data detectclock n = detect the clock of an nrz/direct modulated wave in the GraphBuffer");
682 }
683 int ans=0;
684 if (cmdp == 'a'){
fef74fdc 685 ans = GetAskClock(Cmd+1, true, false);
f3bf15e4 686 } else if (cmdp == 'f'){
687 ans = GetFskClock("", true, false);
688 } else if (cmdp == 'n'){
689 ans = GetNrzClock("", true, false);
690 } else if (cmdp == 'p'){
691 ans = GetPskClock("", true, false);
692 } else {
693 PrintAndLog ("Please specify a valid modulation to detect the clock of - see option h for help");
694 }
695 return ans;
7fe9b0b7 696}
66707a3b 697
2767fc02 698char *GetFSKType(uint8_t fchigh, uint8_t fclow, uint8_t invert)
699{
0c50084a 700 static char fType[8];
9e4cee22 701 memset(fType, 0x00, 8);
0c50084a 702 char *fskType = fType;
2767fc02 703 if (fchigh==10 && fclow==8){
704 if (invert) //fsk2a
38b35095 705 memcpy(fskType, "FSK2a", 5);
2767fc02 706 else //fsk2
38b35095 707 memcpy(fskType, "FSK2", 4);
2767fc02 708 } else if (fchigh == 8 && fclow == 5) {
709 if (invert)
38b35095 710 memcpy(fskType, "FSK1", 4);
2767fc02 711 else
38b35095 712 memcpy(fskType, "FSK1a", 5);
2767fc02 713 } else {
38b35095 714 memcpy(fskType, "FSK??", 5);
2767fc02 715 }
716 return fskType;
717}
718
2fc2150e 719//by marshmellow
eb191de6 720//fsk raw demod and print binary
6de43508 721//takes 4 arguments - Clock, invert, fchigh, fclow
722//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
4ac906d1 723int FSKrawDemod(const char *Cmd, bool verbose)
b3b70669 724{
e0165dcf 725 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
506672c4 726 uint8_t rfLen, invert, fchigh, fclow;
506672c4 727 //set defaults
e0165dcf 728 //set options from parameters entered with the command
6ca1477c 729 rfLen = param_get8(Cmd, 0);
730 invert = param_get8(Cmd, 1);
731 fchigh = param_get8(Cmd, 2);
732 fclow = param_get8(Cmd, 3);
d1869c33 733
e0165dcf 734 if (strlen(Cmd)>0 && strlen(Cmd)<=2) {
a0cc89b4 735 if (rfLen==1) {
2eec55c8 736 invert = 1; //if invert option only is used
e0165dcf 737 rfLen = 0;
a0cc89b4 738 }
e0165dcf 739 }
e0165dcf 740 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
741 size_t BitLen = getFromGraphBuf(BitStream);
742 if (BitLen==0) return 0;
743 //get field clock lengths
a0cc89b4 744 uint16_t fcs=0;
506672c4 745 if (!fchigh || !fclow) {
a0cc89b4 746 fcs = countFC(BitStream, BitLen, 1);
747 if (!fcs) {
748 fchigh = 10;
749 fclow = 8;
750 } else {
751 fchigh = (fcs >> 8) & 0x00FF;
752 fclow = fcs & 0x00FF;
e0165dcf 753 }
754 }
755 //get bit clock length
a0cc89b4 756 if (!rfLen) {
e0165dcf 757 rfLen = detectFSKClk(BitStream, BitLen, fchigh, fclow);
506672c4 758 if (!rfLen) rfLen = 50;
e0165dcf 759 }
506672c4 760 int size = fskdemod(BitStream, BitLen, rfLen, invert, fchigh, fclow);
a0cc89b4 761 if (size > 0) {
e0165dcf 762 setDemodBuf(BitStream,size,0);
763
764 // Now output the bitstream to the scrollback by line of 16 bits
2767fc02 765 if (verbose || g_debugMode) {
a0cc89b4 766 PrintAndLog("\nUsing Clock:%u, invert:%u, fchigh:%u, fclow:%u", (unsigned int)rfLen, (unsigned int)invert, (unsigned int)fchigh, (unsigned int)fclow);
2767fc02 767 PrintAndLog("%s decoded bitstream:",GetFSKType(fchigh,fclow,invert));
768 printDemodBuff();
e0165dcf 769 }
d1869c33 770
e0165dcf 771 return 1;
506672c4 772 } else {
2767fc02 773 if (g_debugMode) PrintAndLog("no FSK data found");
e0165dcf 774 }
775 return 0;
b3b70669 776}
777
4ac906d1 778//by marshmellow
779//fsk raw demod and print binary
780//takes 4 arguments - Clock, invert, fchigh, fclow
781//defaults: clock = 50, invert=1, fchigh=10, fclow=8 (RF/10 RF/8 (fsk2a))
782int CmdFSKrawdemod(const char *Cmd)
783{
e0165dcf 784 char cmdp = param_getchar(Cmd, 0);
01d0f8ae 785 if (strlen(Cmd) > 20 || cmdp == 'h' || cmdp == 'H') {
e0165dcf 786 PrintAndLog("Usage: data rawdemod fs [clock] <invert> [fchigh] [fclow]");
787 PrintAndLog(" [set clock as integer] optional, omit for autodetect.");
788 PrintAndLog(" <invert>, 1 for invert output, can be used even if the clock is omitted");
789 PrintAndLog(" [fchigh], larger field clock length, omit for autodetect");
790 PrintAndLog(" [fclow], small field clock length, omit for autodetect");
791 PrintAndLog("");
792 PrintAndLog(" sample: data rawdemod fs = demod an fsk tag from GraphBuffer using autodetect");
793 PrintAndLog(" : data rawdemod fs 32 = demod an fsk tag from GraphBuffer using a clock of RF/32, autodetect fc");
794 PrintAndLog(" : data rawdemod fs 1 = demod an fsk tag from GraphBuffer using autodetect, invert output");
795 PrintAndLog(" : data rawdemod fs 32 1 = demod an fsk tag from GraphBuffer using a clock of RF/32, invert output, autodetect fc");
796 PrintAndLog(" : data rawdemod fs 64 0 8 5 = demod an fsk1 RF/64 tag from GraphBuffer");
797 PrintAndLog(" : data rawdemod fs 50 0 10 8 = demod an fsk2 RF/50 tag from GraphBuffer");
798 PrintAndLog(" : data rawdemod fs 50 1 10 8 = demod an fsk2a RF/50 tag from GraphBuffer");
799 return 0;
800 }
7cb8516c 801 return FSKrawDemod(Cmd, true);
4ac906d1 802}
803
04d2721b 804//by marshmellow
805//Paradox Prox demod - FSK RF/50 with preamble of 00001111 (then manchester encoded)
ec75f5c1 806//print full Paradox Prox ID and some bit format details if found
807int CmdFSKdemodParadox(const char *Cmd)
808{
e0165dcf 809 //raw fsk demod no manchester decoding no start bit finding just get binary from wave
810 uint32_t hi2=0, hi=0, lo=0;
811
812 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
813 size_t BitLen = getFromGraphBuf(BitStream);
814 if (BitLen==0) return 0;
815 //get binary from fsk wave
816 int idx = ParadoxdemodFSK(BitStream,&BitLen,&hi2,&hi,&lo);
817 if (idx<0){
818 if (g_debugMode){
819 if (idx==-1){
820 PrintAndLog("DEBUG: Just Noise Detected");
821 } else if (idx == -2) {
822 PrintAndLog("DEBUG: Error demoding fsk");
823 } else if (idx == -3) {
824 PrintAndLog("DEBUG: Preamble not found");
825 } else if (idx == -4) {
826 PrintAndLog("DEBUG: Error in Manchester data");
827 } else {
828 PrintAndLog("DEBUG: Error demoding fsk %d", idx);
829 }
830 }
831 return 0;
832 }
833 if (hi2==0 && hi==0 && lo==0){
834 if (g_debugMode) PrintAndLog("DEBUG: Error - no value found");
835 return 0;
836 }
837 uint32_t fc = ((hi & 0x3)<<6) | (lo>>26);
838 uint32_t cardnum = (lo>>10)&0xFFFF;
839 uint32_t rawLo = bytebits_to_byte(BitStream+idx+64,32);
840 uint32_t rawHi = bytebits_to_byte(BitStream+idx+32,32);
841 uint32_t rawHi2 = bytebits_to_byte(BitStream+idx,32);
842
843 PrintAndLog("Paradox TAG ID: %x%08x - FC: %d - Card: %d - Checksum: %02x - RAW: %08x%08x%08x",
844 hi>>10, (hi & 0x3)<<26 | (lo>>10), fc, cardnum, (lo>>2) & 0xFF, rawHi2, rawHi, rawLo);
845 setDemodBuf(BitStream,BitLen,idx);
846 if (g_debugMode){
847 PrintAndLog("DEBUG: idx: %d, len: %d, Printing Demod Buffer:", idx, BitLen);
848 printDemodBuff();
849 }
850 return 1;
b3b70669 851}
852
e770c648 853//by marshmellow
854//attempt to psk1 demod graph buffer
4ac906d1 855int PSKDemod(const char *Cmd, bool verbose)
e770c648 856{
e0165dcf 857 int invert=0;
858 int clk=0;
859 int maxErr=100;
860 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
861 if (clk==1){
862 invert=1;
863 clk=0;
864 }
865 if (invert != 0 && invert != 1) {
2ec87733 866 if (g_debugMode || verbose) PrintAndLog("Invalid argument: %s", Cmd);
e0165dcf 867 return 0;
868 }
869 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
870 size_t BitLen = getFromGraphBuf(BitStream);
2ec87733 871 if (BitLen==0) return 0;
2eec55c8 872 uint8_t carrier=countFC(BitStream, BitLen, 0);
e0165dcf 873 if (carrier!=2 && carrier!=4 && carrier!=8){
874 //invalid carrier
875 return 0;
876 }
6fe5c94b 877 if (g_debugMode){
878 PrintAndLog("Carrier: rf/%d",carrier);
879 }
e0165dcf 880 int errCnt=0;
881 errCnt = pskRawDemod(BitStream, &BitLen, &clk, &invert);
882 if (errCnt > maxErr){
2767fc02 883 if (g_debugMode || verbose) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
e0165dcf 884 return 0;
885 }
886 if (errCnt<0|| BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
2767fc02 887 if (g_debugMode || verbose) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
e0165dcf 888 return 0;
889 }
2767fc02 890 if (verbose || g_debugMode){
891 PrintAndLog("\nUsing Clock:%d, invert:%d, Bits Found:%d",clk,invert,BitLen);
e0165dcf 892 if (errCnt>0){
2767fc02 893 PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
e0165dcf 894 }
895 }
896 //prime demod buffer for output
897 setDemodBuf(BitStream,BitLen,0);
898 return 1;
4118b74d 899}
e770c648 900
411105e0 901int CmdPSKNexWatch(const char *Cmd)
902{
903 if (!PSKDemod("", false)) return 0;
904 uint8_t preamble[28] = {0,0,0,0,0,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
905 size_t startIdx = 0, size = DemodBufferLen;
906 bool invert = false;
907 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)){
908 // if didn't find preamble try again inverting
909 if (!PSKDemod("1", false)) return 0;
910 size = DemodBufferLen;
911 if (!preambleSearch(DemodBuffer, preamble, sizeof(preamble), &size, &startIdx)) return 0;
912 invert = true;
913 }
914 if (size != 128) return 0;
915 setDemodBuf(DemodBuffer, size, startIdx+4);
916 startIdx = 8+32; //4 = extra i added, 8 = preamble, 32 = reserved bits (always 0)
917 //get ID
918 uint32_t ID = 0;
919 for (uint8_t wordIdx=0; wordIdx<4; wordIdx++){
920 for (uint8_t idx=0; idx<8; idx++){
921 ID = (ID << 1) | DemodBuffer[startIdx+wordIdx+(idx*4)];
922 }
923 }
924 //parity check (TBD)
925
926 //checksum check (TBD)
927
928 //output
929 PrintAndLog("NexWatch ID: %d", ID);
930 if (invert){
931 PrintAndLog("Had to Invert - probably NexKey");
932 for (uint8_t idx=0; idx<size; idx++)
933 DemodBuffer[idx] ^= 1;
934 }
935
936 CmdPrintDemodBuff("x");
937 return 1;
938}
939
04d2721b 940// by marshmellow
e770c648 941// takes 3 arguments - clock, invert, maxErr as integers
942// attempts to demodulate nrz only
943// prints binary found and saves in demodbuffer for further commands
b4a2fcf6 944int NRZrawDemod(const char *Cmd, bool verbose)
e770c648 945{
e0165dcf 946 int invert=0;
947 int clk=0;
948 int maxErr=100;
949 sscanf(Cmd, "%i %i %i", &clk, &invert, &maxErr);
950 if (clk==1){
951 invert=1;
952 clk=0;
953 }
954 if (invert != 0 && invert != 1) {
955 PrintAndLog("Invalid argument: %s", Cmd);
956 return 0;
957 }
958 uint8_t BitStream[MAX_GRAPH_TRACE_LEN]={0};
959 size_t BitLen = getFromGraphBuf(BitStream);
960 if (BitLen==0) return 0;
961 int errCnt=0;
6f36848f 962 int clkStartIdx = 0;
963 errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, &clkStartIdx);
e0165dcf 964 if (errCnt > maxErr){
965 if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
966 return 0;
967 }
2eec55c8 968 if (errCnt<0 || BitLen<16){ //throw away static - allow 1 and -1 (in case of threshold command first)
e0165dcf 969 if (g_debugMode) PrintAndLog("no data found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
970 return 0;
971 }
972 if (verbose || g_debugMode) PrintAndLog("Tried NRZ Demod using Clock: %d - invert: %d - Bits Found: %d",clk,invert,BitLen);
973 //prime demod buffer for output
974 setDemodBuf(BitStream,BitLen,0);
975
2767fc02 976 if (errCnt>0 && (verbose || g_debugMode)) PrintAndLog("# Errors during Demoding (shown as 7 in bit stream): %d",errCnt);
e0165dcf 977 if (verbose || g_debugMode) {
978 PrintAndLog("NRZ demoded bitstream:");
979 // Now output the bitstream to the scrollback by line of 16 bits
980 printDemodBuff();
981 }
982 return 1;
b4a2fcf6 983}
984
985int CmdNRZrawDemod(const char *Cmd)
986{
e0165dcf 987 char cmdp = param_getchar(Cmd, 0);
01d0f8ae 988 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
e0165dcf 989 PrintAndLog("Usage: data rawdemod nr [clock] <0|1> [maxError]");
990 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
991 PrintAndLog(" <invert>, 1 for invert output");
992 PrintAndLog(" [set maximum allowed errors], default = 100.");
993 PrintAndLog("");
994 PrintAndLog(" sample: data rawdemod nr = demod a nrz/direct tag from GraphBuffer");
995 PrintAndLog(" : data rawdemod nr 32 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32");
996 PrintAndLog(" : data rawdemod nr 32 1 = demod a nrz/direct tag from GraphBuffer using a clock of RF/32 and inverting data");
997 PrintAndLog(" : data rawdemod nr 1 = demod a nrz/direct tag from GraphBuffer while inverting data");
998 PrintAndLog(" : data rawdemod nr 64 1 0 = demod a nrz/direct tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
999 return 0;
1000 }
7cb8516c 1001 return NRZrawDemod(Cmd, true);
e770c648 1002}
1003
1004// by marshmellow
1005// takes 3 arguments - clock, invert, maxErr as integers
04d2721b 1006// attempts to demodulate psk only
1007// prints binary found and saves in demodbuffer for further commands
e770c648 1008int CmdPSK1rawDemod(const char *Cmd)
4118b74d 1009{
e0165dcf 1010 int ans;
1011 char cmdp = param_getchar(Cmd, 0);
01d0f8ae 1012 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
e0165dcf 1013 PrintAndLog("Usage: data rawdemod p1 [clock] <0|1> [maxError]");
1014 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1015 PrintAndLog(" <invert>, 1 for invert output");
1016 PrintAndLog(" [set maximum allowed errors], default = 100.");
1017 PrintAndLog("");
1018 PrintAndLog(" sample: data rawdemod p1 = demod a psk1 tag from GraphBuffer");
1019 PrintAndLog(" : data rawdemod p1 32 = demod a psk1 tag from GraphBuffer using a clock of RF/32");
1020 PrintAndLog(" : data rawdemod p1 32 1 = demod a psk1 tag from GraphBuffer using a clock of RF/32 and inverting data");
1021 PrintAndLog(" : data rawdemod p1 1 = demod a psk1 tag from GraphBuffer while inverting data");
1022 PrintAndLog(" : data rawdemod p1 64 1 0 = demod a psk1 tag from GraphBuffer using a clock of RF/64, inverting data and allowing 0 demod errors");
1023 return 0;
1024 }
7cb8516c 1025 ans = PSKDemod(Cmd, true);
e0165dcf 1026 //output
1027 if (!ans){
1028 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1029 return 0;
1030 }
7a8a982b 1031
2767fc02 1032 PrintAndLog("PSK1 demoded bitstream:");
e0165dcf 1033 // Now output the bitstream to the scrollback by line of 16 bits
1034 printDemodBuff();
1035 return 1;
4118b74d 1036}
1037
04d2721b 1038// by marshmellow
19ff0210 1039// takes same args as cmdpsk1rawdemod
04d2721b 1040int CmdPSK2rawDemod(const char *Cmd)
1041{
e0165dcf 1042 int ans=0;
1043 char cmdp = param_getchar(Cmd, 0);
01d0f8ae 1044 if (strlen(Cmd) > 16 || cmdp == 'h' || cmdp == 'H') {
e0165dcf 1045 PrintAndLog("Usage: data rawdemod p2 [clock] <0|1> [maxError]");
1046 PrintAndLog(" [set clock as integer] optional, if not set, autodetect.");
1047 PrintAndLog(" <invert>, 1 for invert output");
1048 PrintAndLog(" [set maximum allowed errors], default = 100.");
1049 PrintAndLog("");
1050 PrintAndLog(" sample: data rawdemod p2 = demod a psk2 tag from GraphBuffer, autodetect clock");
1051 PrintAndLog(" : data rawdemod p2 32 = demod a psk2 tag from GraphBuffer using a clock of RF/32");
1052 PrintAndLog(" : data rawdemod p2 32 1 = demod a psk2 tag from GraphBuffer using a clock of RF/32 and inverting output");
1053 PrintAndLog(" : data rawdemod p2 1 = demod a psk2 tag from GraphBuffer, autodetect clock and invert output");
1054 PrintAndLog(" : data rawdemod p2 64 1 0 = demod a psk2 tag from GraphBuffer using a clock of RF/64, inverting output and allowing 0 demod errors");
1055 return 0;
1056 }
7cb8516c 1057 ans=PSKDemod(Cmd, true);
e0165dcf 1058 if (!ans){
1059 if (g_debugMode) PrintAndLog("Error demoding: %d",ans);
1060 return 0;
1061 }
1062 psk1TOpsk2(DemodBuffer, DemodBufferLen);
1063 PrintAndLog("PSK2 demoded bitstream:");
1064 // Now output the bitstream to the scrollback by line of 16 bits
1065 printDemodBuff();
1066 return 1;
04d2721b 1067}
1068
19ff0210 1069// by marshmellow - combines all raw demod functions into one menu command
1070int CmdRawDemod(const char *Cmd)
1071{
1072 char cmdp = Cmd[0]; //param_getchar(Cmd, 0);
1073
01d0f8ae 1074 if (strlen(Cmd) > 35 || cmdp == 'h' || cmdp == 'H' || strlen(Cmd)<2) {
19ff0210 1075 PrintAndLog("Usage: data rawdemod [modulation] <help>|<options>");
b41534d1 1076 PrintAndLog(" [modulation] as 2 char, 'ab' for ask/biphase, 'am' for ask/manchester, 'ar' for ask/raw, 'fs' for fsk, ...");
1077 PrintAndLog(" 'nr' for nrz/direct, 'p1' for psk1, 'p2' for psk2");
19ff0210 1078 PrintAndLog(" <help> as 'h', prints the help for the specific modulation");
1079 PrintAndLog(" <options> see specific modulation help for optional parameters");
1080 PrintAndLog("");
1fbf8956 1081 PrintAndLog(" sample: data rawdemod fs h = print help specific to fsk demod");
19ff0210 1082 PrintAndLog(" : data rawdemod fs = demod GraphBuffer using: fsk - autodetect");
b41534d1 1083 PrintAndLog(" : data rawdemod ab = demod GraphBuffer using: ask/biphase - autodetect");
19ff0210 1084 PrintAndLog(" : data rawdemod am = demod GraphBuffer using: ask/manchester - autodetect");
1085 PrintAndLog(" : data rawdemod ar = demod GraphBuffer using: ask/raw - autodetect");
1086 PrintAndLog(" : data rawdemod nr = demod GraphBuffer using: nrz/direct - autodetect");
1087 PrintAndLog(" : data rawdemod p1 = demod GraphBuffer using: psk1 - autodetect");
1088 PrintAndLog(" : data rawdemod p2 = demod GraphBuffer using: psk2 - autodetect");
1089 return 0;
1090 }
1091 char cmdp2 = Cmd[1];
1092 int ans = 0;
1093 if (cmdp == 'f' && cmdp2 == 's'){
f8f894a5 1094 ans = CmdFSKrawdemod(Cmd+2);
b41534d1 1095 } else if(cmdp == 'a' && cmdp2 == 'b'){
f8f894a5 1096 ans = Cmdaskbiphdemod(Cmd+2);
19ff0210 1097 } else if(cmdp == 'a' && cmdp2 == 'm'){
f8f894a5 1098 ans = Cmdaskmandemod(Cmd+2);
19ff0210 1099 } else if(cmdp == 'a' && cmdp2 == 'r'){
f8f894a5 1100 ans = Cmdaskrawdemod(Cmd+2);
19ff0210 1101 } else if(cmdp == 'n' && cmdp2 == 'r'){
f8f894a5 1102 ans = CmdNRZrawDemod(Cmd+2);
19ff0210 1103 } else if(cmdp == 'p' && cmdp2 == '1'){
f8f894a5 1104 ans = CmdPSK1rawDemod(Cmd+2);
19ff0210 1105 } else if(cmdp == 'p' && cmdp2 == '2'){
f8f894a5 1106 ans = CmdPSK2rawDemod(Cmd+2);
19ff0210 1107 } else {
1108 PrintAndLog("unknown modulation entered - see help ('h') for parameter structure");
1109 }
1110 return ans;
1111}
1112
7fe9b0b7 1113int CmdGrid(const char *Cmd)
1114{
e0165dcf 1115 sscanf(Cmd, "%i %i", &PlotGridX, &PlotGridY);
1116 PlotGridXdefault= PlotGridX;
1117 PlotGridYdefault= PlotGridY;
1118 RepaintGraphWindow();
1119 return 0;
7fe9b0b7 1120}
1121
f9f0e83b 1122int CmdSetGraphMarkers(const char *Cmd) {
1123 sscanf(Cmd, "%i %i", &CursorCPos, &CursorDPos);
1124 RepaintGraphWindow();
1125 return 0;
1126}
1127
7fe9b0b7 1128int CmdHexsamples(const char *Cmd)
1129{
e0165dcf 1130 int i, j;
1131 int requested = 0;
1132 int offset = 0;
1133 char string_buf[25];
1134 char* string_ptr = string_buf;
1135 uint8_t got[BIGBUF_SIZE];
1136
1137 sscanf(Cmd, "%i %i", &requested, &offset);
1138
1139 /* if no args send something */
1140 if (requested == 0) {
1141 requested = 8;
1142 }
1143 if (offset + requested > sizeof(got)) {
1144 PrintAndLog("Tried to read past end of buffer, <bytes> + <offset> > %d", BIGBUF_SIZE);
1145 return 0;
1146 }
1147
1148 GetFromBigBuf(got,requested,offset);
1149 WaitForResponse(CMD_ACK,NULL);
1150
1151 i = 0;
1152 for (j = 0; j < requested; j++) {
1153 i++;
1154 string_ptr += sprintf(string_ptr, "%02x ", got[j]);
1155 if (i == 8) {
1156 *(string_ptr - 1) = '\0'; // remove the trailing space
1157 PrintAndLog("%s", string_buf);
1158 string_buf[0] = '\0';
1159 string_ptr = string_buf;
1160 i = 0;
1161 }
1162 if (j == requested - 1 && string_buf[0] != '\0') { // print any remaining bytes
1163 *(string_ptr - 1) = '\0';
1164 PrintAndLog("%s", string_buf);
1165 string_buf[0] = '\0';
1166 }
1167 }
1168 return 0;
7fe9b0b7 1169}
1170
7fe9b0b7 1171int CmdHide(const char *Cmd)
1172{
e0165dcf 1173 HideGraphWindow();
1174 return 0;
7fe9b0b7 1175}
1176
78f5b1a7 1177//zero mean GraphBuffer
7fe9b0b7 1178int CmdHpf(const char *Cmd)
1179{
e0165dcf 1180 int i;
1181 int accum = 0;
7fe9b0b7 1182
e0165dcf 1183 for (i = 10; i < GraphTraceLen; ++i)
1184 accum += GraphBuffer[i];
1185 accum /= (GraphTraceLen - 10);
1186 for (i = 0; i < GraphTraceLen; ++i)
1187 GraphBuffer[i] -= accum;
7fe9b0b7 1188
e0165dcf 1189 RepaintGraphWindow();
1190 return 0;
7fe9b0b7 1191}
f6d9fb17 1192
f6821167 1193uint8_t getByte(uint8_t bits_per_sample, BitstreamIn* b)
f6d9fb17
MHS
1194{
1195 int i;
1196 uint8_t val = 0;
1197 for(i =0 ; i < bits_per_sample; i++)
1198 {
f6821167 1199 val |= (headBit(b) << (7-i));
f6d9fb17
MHS
1200 }
1201 return val;
1202}
7fe9b0b7 1203
1fbf8956 1204int getSamples(const char *Cmd, bool silent)
7fe9b0b7 1205{
e0165dcf 1206 //If we get all but the last byte in bigbuf,
1207 // we don't have to worry about remaining trash
1208 // in the last byte in case the bits-per-sample
1209 // does not line up on byte boundaries
1210
1211 uint8_t got[BIGBUF_SIZE-1] = { 0 };
1212
1213 int n = strtol(Cmd, NULL, 0);
1214
709665b5 1215 if (n == 0 || n > sizeof(got))
e0165dcf 1216 n = sizeof(got);
1217
1218 PrintAndLog("Reading %d bytes from device memory\n", n);
1219 GetFromBigBuf(got,n,0);
1220 PrintAndLog("Data fetched");
1221 UsbCommand response;
1222 WaitForResponse(CMD_ACK, &response);
1223 uint8_t bits_per_sample = 8;
1224
1225 //Old devices without this feature would send 0 at arg[0]
1226 if(response.arg[0] > 0)
1227 {
1228 sample_config *sc = (sample_config *) response.d.asBytes;
1229 PrintAndLog("Samples @ %d bits/smpl, decimation 1:%d ", sc->bits_per_sample
1230 , sc->decimation);
1231 bits_per_sample = sc->bits_per_sample;
1232 }
1233 if(bits_per_sample < 8)
1234 {
1235 PrintAndLog("Unpacking...");
f6821167 1236 BitstreamIn bout = { got, bits_per_sample * n, 0};
e0165dcf 1237 int j =0;
e6432f05 1238 for (j = 0; j * bits_per_sample < n * 8 && j < n; j++) {
e0165dcf 1239 uint8_t sample = getByte(bits_per_sample, &bout);
1240 GraphBuffer[j] = ((int) sample )- 128;
1241 }
1242 GraphTraceLen = j;
1243 PrintAndLog("Unpacked %d samples" , j );
1244 }else
1245 {
1246 for (int j = 0; j < n; j++) {
1247 GraphBuffer[j] = ((int)got[j]) - 128;
1248 }
1249 GraphTraceLen = n;
1250 }
1251
1252 RepaintGraphWindow();
1253 return 0;
1fbf8956 1254}
1255
1256int CmdSamples(const char *Cmd)
1257{
e0165dcf 1258 return getSamples(Cmd, false);
7fe9b0b7 1259}
1260
d6a120a2
MHS
1261int CmdTuneSamples(const char *Cmd)
1262{
fdcfbdcc
RAB
1263 int timeout = 0, arg = FLAG_TUNE_ALL;
1264
1265 if(*Cmd == 'l') {
1266 arg = FLAG_TUNE_LF;
1267 } else if (*Cmd == 'h') {
1268 arg = FLAG_TUNE_HF;
1269 } else if (*Cmd != '\0') {
1270 PrintAndLog("use 'tune' or 'tune l' or 'tune h'");
1271 return 0;
1272 }
1273
3aa4014b 1274 printf("\nMeasuring antenna characteristics, please wait...");
ba1a299c 1275
fdcfbdcc 1276 UsbCommand c = {CMD_MEASURE_ANTENNA_TUNING, {arg, 0, 0}};
3aa4014b 1277 SendCommand(&c);
1278
1279 UsbCommand resp;
1280 while(!WaitForResponseTimeout(CMD_MEASURED_ANTENNA_TUNING,&resp,1000)) {
1281 timeout++;
1282 printf(".");
1283 if (timeout > 7) {
1284 PrintAndLog("\nNo response from Proxmark. Aborting...");
1285 return 1;
1286 }
1287 }
1288
1289 int peakv, peakf;
1290 int vLf125, vLf134, vHf;
1291 vLf125 = resp.arg[0] & 0xffff;
1292 vLf134 = resp.arg[0] >> 16;
1293 vHf = resp.arg[1] & 0xffff;;
1294 peakf = resp.arg[2] & 0xffff;
1295 peakv = resp.arg[2] >> 16;
1296 PrintAndLog("");
1297 PrintAndLog("# LF antenna: %5.2f V @ 125.00 kHz", vLf125/1000.0);
1298 PrintAndLog("# LF antenna: %5.2f V @ 134.00 kHz", vLf134/1000.0);
1299 PrintAndLog("# LF optimal: %5.2f V @%9.2f kHz", peakv/1000.0, 12000.0/(peakf+1));
1300 PrintAndLog("# HF antenna: %5.2f V @ 13.56 MHz", vHf/1000.0);
0d0d0499 1301
2767fc02 1302 #define LF_UNUSABLE_V 2948 // was 2000. Changed due to bugfix in voltage measurements. LF results are now 47% higher.
1303 #define LF_MARGINAL_V 14739 // was 10000. Changed due to bugfix bug in voltage measurements. LF results are now 47% higher.
1304 #define HF_UNUSABLE_V 3167 // was 2000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
1305 #define HF_MARGINAL_V 7917 // was 5000. Changed due to bugfix in voltage measurements. HF results are now 58% higher.
0d0d0499 1306
1307 if (peakv < LF_UNUSABLE_V)
3aa4014b 1308 PrintAndLog("# Your LF antenna is unusable.");
0d0d0499 1309 else if (peakv < LF_MARGINAL_V)
3aa4014b 1310 PrintAndLog("# Your LF antenna is marginal.");
0d0d0499 1311 if (vHf < HF_UNUSABLE_V)
3aa4014b 1312 PrintAndLog("# Your HF antenna is unusable.");
0d0d0499 1313 else if (vHf < HF_MARGINAL_V)
3aa4014b 1314 PrintAndLog("# Your HF antenna is marginal.");
1315
0d0d0499 1316 if (peakv >= LF_UNUSABLE_V) {
1317 for (int i = 0; i < 256; i++) {
1318 GraphBuffer[i] = resp.d.asBytes[i] - 128;
1319 }
1320 PrintAndLog("Displaying LF tuning graph. Divisor 89 is 134khz, 95 is 125khz.\n");
1321 PrintAndLog("\n");
1322 GraphTraceLen = 256;
1323 ShowGraphWindow();
abd16c45 1324 RepaintGraphWindow();
ba1a299c 1325 }
1326
b4fb11ba 1327 return 0;
d6a120a2
MHS
1328}
1329
3aa4014b 1330
7fe9b0b7 1331int CmdLoad(const char *Cmd)
1332{
e0165dcf 1333 char filename[FILE_PATH_SIZE] = {0x00};
1334 int len = 0;
b915fda3 1335
e0165dcf 1336 len = strlen(Cmd);
1337 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1338 memcpy(filename, Cmd, len);
b915fda3 1339
e0165dcf 1340 FILE *f = fopen(filename, "r");
1341 if (!f) {
1342 PrintAndLog("couldn't open '%s'", filename);
1343 return 0;
1344 }
1345
1346 GraphTraceLen = 0;
1347 char line[80];
1348 while (fgets(line, sizeof (line), f)) {
1349 GraphBuffer[GraphTraceLen] = atoi(line);
1350 GraphTraceLen++;
1351 }
1352 fclose(f);
1353 PrintAndLog("loaded %d samples", GraphTraceLen);
1354 RepaintGraphWindow();
1355 return 0;
7fe9b0b7 1356}
1357
1358int CmdLtrim(const char *Cmd)
1359{
e0165dcf 1360 int ds = atoi(Cmd);
cc15a118 1361 if (GraphTraceLen<=0) return 0;
e0165dcf 1362 for (int i = ds; i < GraphTraceLen; ++i)
1363 GraphBuffer[i-ds] = GraphBuffer[i];
1364 GraphTraceLen -= ds;
7fe9b0b7 1365
e0165dcf 1366 RepaintGraphWindow();
1367 return 0;
7fe9b0b7 1368}
ec75f5c1 1369
1370// trim graph to input argument length
9ec1416a 1371int CmdRtrim(const char *Cmd)
1372{
e0165dcf 1373 int ds = atoi(Cmd);
9ec1416a 1374
e0165dcf 1375 GraphTraceLen = ds;
9ec1416a 1376
e0165dcf 1377 RepaintGraphWindow();
1378 return 0;
9ec1416a 1379}
7fe9b0b7 1380
f75b313b 1381// trim graph (middle) piece
1382int CmdMtrim(const char *Cmd) {
1383 int start = 0, stop = 0;
1384 sscanf(Cmd, "%i %i", &start, &stop);
1385
1386 if (start > GraphTraceLen || stop > GraphTraceLen || start > stop) return 0;
1387 start++; //leave start position sample
1388
1389 GraphTraceLen -= stop - start;
1390 for (int i = 0; i < GraphTraceLen; i++) {
1391 GraphBuffer[start+i] = GraphBuffer[stop+i];
1392 }
1393 return 0;
1394}
1395
1396
7fe9b0b7 1397int CmdNorm(const char *Cmd)
1398{
e0165dcf 1399 int i;
1400 int max = INT_MIN, min = INT_MAX;
7fe9b0b7 1401
e0165dcf 1402 for (i = 10; i < GraphTraceLen; ++i) {
1403 if (GraphBuffer[i] > max)
1404 max = GraphBuffer[i];
1405 if (GraphBuffer[i] < min)
1406 min = GraphBuffer[i];
1407 }
7fe9b0b7 1408
e0165dcf 1409 if (max != min) {
1410 for (i = 0; i < GraphTraceLen; ++i) {
ba1a299c 1411 GraphBuffer[i] = (GraphBuffer[i] - ((max + min) / 2)) * 256 /
e0165dcf 1412 (max - min);
ba1a299c 1413 //marshmelow: adjusted *1000 to *256 to make +/- 128 so demod commands still work
e0165dcf 1414 }
1415 }
1416 RepaintGraphWindow();
1417 return 0;
7fe9b0b7 1418}
1419
1420int CmdPlot(const char *Cmd)
1421{
e0165dcf 1422 ShowGraphWindow();
1423 return 0;
7fe9b0b7 1424}
1425
1426int CmdSave(const char *Cmd)
1427{
e0165dcf 1428 char filename[FILE_PATH_SIZE] = {0x00};
1429 int len = 0;
b915fda3 1430
e0165dcf 1431 len = strlen(Cmd);
1432 if (len > FILE_PATH_SIZE) len = FILE_PATH_SIZE;
1433 memcpy(filename, Cmd, len);
1434
b915fda3 1435
e0165dcf 1436 FILE *f = fopen(filename, "w");
1437 if(!f) {
1438 PrintAndLog("couldn't open '%s'", filename);
1439 return 0;
1440 }
1441 int i;
1442 for (i = 0; i < GraphTraceLen; i++) {
1443 fprintf(f, "%d\n", GraphBuffer[i]);
1444 }
1445 fclose(f);
1446 PrintAndLog("saved to '%s'", Cmd);
1447 return 0;
7fe9b0b7 1448}
1449
1450int CmdScale(const char *Cmd)
1451{
e0165dcf 1452 CursorScaleFactor = atoi(Cmd);
1453 if (CursorScaleFactor == 0) {
1454 PrintAndLog("bad, can't have zero scale");
1455 CursorScaleFactor = 1;
1456 }
1457 RepaintGraphWindow();
1458 return 0;
7fe9b0b7 1459}
1460
d51b2eda
MHS
1461int CmdDirectionalThreshold(const char *Cmd)
1462{
e0165dcf 1463 int8_t upThres = param_get8(Cmd, 0);
1464 int8_t downThres = param_get8(Cmd, 1);
1465
1466 printf("Applying Up Threshold: %d, Down Threshold: %d\n", upThres, downThres);
1467
1468 int lastValue = GraphBuffer[0];
1469 GraphBuffer[0] = 0; // Will be changed at the end, but init 0 as we adjust to last samples value if no threshold kicks in.
1470
1471 for (int i = 1; i < GraphTraceLen; ++i) {
1472 // Apply first threshold to samples heading up
1473 if (GraphBuffer[i] >= upThres && GraphBuffer[i] > lastValue)
1474 {
1475 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
127f1490 1476 GraphBuffer[i] = 127;
e0165dcf 1477 }
1478 // Apply second threshold to samples heading down
1479 else if (GraphBuffer[i] <= downThres && GraphBuffer[i] < lastValue)
1480 {
1481 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
127f1490 1482 GraphBuffer[i] = -127;
e0165dcf 1483 }
1484 else
1485 {
1486 lastValue = GraphBuffer[i]; // Buffer last value as we overwrite it.
1487 GraphBuffer[i] = GraphBuffer[i-1];
1488
1489 }
1490 }
1491 GraphBuffer[0] = GraphBuffer[1]; // Aline with first edited sample.
1492 RepaintGraphWindow();
1493 return 0;
d51b2eda
MHS
1494}
1495
7fe9b0b7 1496int CmdZerocrossings(const char *Cmd)
1497{
e0165dcf 1498 // Zero-crossings aren't meaningful unless the signal is zero-mean.
1499 CmdHpf("");
1500
1501 int sign = 1;
1502 int zc = 0;
1503 int lastZc = 0;
1504
1505 for (int i = 0; i < GraphTraceLen; ++i) {
1506 if (GraphBuffer[i] * sign >= 0) {
1507 // No change in sign, reproduce the previous sample count.
1508 zc++;
1509 GraphBuffer[i] = lastZc;
1510 } else {
1511 // Change in sign, reset the sample count.
1512 sign = -sign;
1513 GraphBuffer[i] = lastZc;
1514 if (sign > 0) {
1515 lastZc = zc;
1516 zc = 0;
1517 }
1518 }
1519 }
1520
1521 RepaintGraphWindow();
1522 return 0;
7fe9b0b7 1523}
1524
f6821167
MHS
1525int usage_data_bin2hex(){
1526 PrintAndLog("Usage: data bin2hex <binary_digits>");
1527 PrintAndLog(" This function will ignore all characters not 1 or 0 (but stop reading on whitespace)");
1528 return 0;
1529}
1530
1531/**
1532 * @brief Utility for conversion via cmdline.
1533 * @param Cmd
1534 * @return
1535 */
1536int Cmdbin2hex(const char *Cmd)
1537{
1538 int bg =0, en =0;
1539 if(param_getptr(Cmd, &bg, &en, 0))
1540 {
1541 return usage_data_bin2hex();
1542 }
1543 //Number of digits supplied as argument
1544 size_t length = en - bg +1;
1545 size_t bytelen = (length+7) / 8;
1546 uint8_t* arr = (uint8_t *) malloc(bytelen);
1547 memset(arr, 0, bytelen);
1548 BitstreamOut bout = { arr, 0, 0 };
1549
1550 for(; bg <= en ;bg++)
1551 {
1552 char c = Cmd[bg];
1553 if( c == '1') pushBit(&bout, 1);
1554 else if( c == '0') pushBit(&bout, 0);
1555 else PrintAndLog("Ignoring '%c'", c);
1556 }
1557
1558 if(bout.numbits % 8 != 0)
1559 {
1560 printf("[padded with %d zeroes]\n", 8-(bout.numbits % 8));
1561 }
1562
1563 //Uses printf instead of PrintAndLog since the latter
1564 // adds linebreaks to each printout - this way was more convenient since we don't have to
1565 // allocate a string and write to that first...
1566 for(size_t x = 0; x < bytelen ; x++)
1567 {
1568 printf("%02X", arr[x]);
1569 }
1570 printf("\n");
1571 free(arr);
1572 return 0;
1573}
1574
72c5877a 1575int usage_data_hex2bin() {
1576 PrintAndLog("Usage: data hex2bin <hex_digits>");
f6821167
MHS
1577 PrintAndLog(" This function will ignore all non-hexadecimal characters (but stop reading on whitespace)");
1578 return 0;
1579
1580}
1581
1582int Cmdhex2bin(const char *Cmd)
1583{
1584 int bg =0, en =0;
1585 if(param_getptr(Cmd, &bg, &en, 0))
1586 {
1587 return usage_data_hex2bin();
1588 }
1589
1590
1591 while(bg <= en )
1592 {
1593 char x = Cmd[bg++];
1594 // capitalize
1595 if (x >= 'a' && x <= 'f')
1596 x -= 32;
1597 // convert to numeric value
1598 if (x >= '0' && x <= '9')
1599 x -= '0';
1600 else if (x >= 'A' && x <= 'F')
1601 x -= 'A' - 10;
1602 else
1603 continue;
1604
1605 //Uses printf instead of PrintAndLog since the latter
1606 // adds linebreaks to each printout - this way was more convenient since we don't have to
1607 // allocate a string and write to that first...
1608
1609 for(int i= 0 ; i < 4 ; ++i)
1610 printf("%d",(x >> (3 - i)) & 1);
1611 }
1612 printf("\n");
1613
1614 return 0;
1615}
1616
ba1a299c 1617static command_t CommandTable[] =
7fe9b0b7 1618{
e0165dcf 1619 {"help", CmdHelp, 1, "This help"},
49bbc60a 1620 {"askedgedetect", CmdAskEdgeDetect, 1, "[threshold] Adjust Graph for manual ask demod using the length of sample differences to detect the edge of a wave (use 20-45, def:25)"},
e0165dcf 1621 {"autocorr", CmdAutoCorr, 1, "[window length] [g] -- Autocorrelation over window - g to save back to GraphBuffer (overwrite)"},
fef74fdc 1622 {"biphaserawdecode",CmdBiphaseDecodeRaw,1, "[offset] [invert<0|1>] [maxErr] -- Biphase decode bin stream in DemodBuffer (offset = 0|1 bits to shift the decode start)"},
5d01f50a 1623 {"bin2hex", Cmdbin2hex, 1, "bin2hex <digits> -- Converts binary to hexadecimal"},
e0165dcf 1624 {"bitsamples", CmdBitsamples, 0, "Get raw samples as bitstring"},
e0165dcf 1625 {"buffclear", CmdBuffClear, 1, "Clear sample buffer and graph window"},
1626 {"dec", CmdDec, 1, "Decimate samples"},
1627 {"detectclock", CmdDetectClockRate, 1, "[modulation] Detect clock rate of wave in GraphBuffer (options: 'a','f','n','p' for ask, fsk, nrz, psk respectively)"},
e0165dcf 1628 //{"fskfcdetect", CmdFSKfcDetect, 1, "Try to detect the Field Clock of an FSK wave"},
e0165dcf 1629 {"fskparadoxdemod", CmdFSKdemodParadox, 1, "Demodulate a Paradox FSK tag from GraphBuffer"},
1630 {"getbitstream", CmdGetBitStream, 1, "Convert GraphBuffer's >=1 values to 1 and <1 to 0"},
1631 {"grid", CmdGrid, 1, "<x> <y> -- overlay grid on graph window, use zero value to turn off either"},
1632 {"hexsamples", CmdHexsamples, 0, "<bytes> [<offset>] -- Dump big buffer as hex bytes"},
f6821167 1633 {"hex2bin", Cmdhex2bin, 1, "hex2bin <hexadecimal> -- Converts hexadecimal to binary"},
e0165dcf 1634 {"hide", CmdHide, 1, "Hide graph window"},
1635 {"hpf", CmdHpf, 1, "Remove DC offset from trace"},
1636 {"load", CmdLoad, 1, "<filename> -- Load trace (to graph window"},
1637 {"ltrim", CmdLtrim, 1, "<samples> -- Trim samples from left of trace"},
1638 {"rtrim", CmdRtrim, 1, "<location to end trace> -- Trim samples from right of trace"},
f75b313b 1639 {"mtrim", CmdMtrim, 1, "<start> <stop> -- Trim out samples from the specified start to the specified stop"},
fef74fdc 1640 {"manrawdecode", Cmdmandecoderaw, 1, "[invert] [maxErr] -- Manchester decode binary stream in DemodBuffer"},
e0165dcf 1641 {"norm", CmdNorm, 1, "Normalize max/min to +/-128"},
1642 {"plot", CmdPlot, 1, "Show graph window (hit 'h' in window for keystroke help)"},
ace26dbd 1643 {"printdemodbuffer",CmdPrintDemodBuff, 1, "[x] [o] <offset> [l] <length> -- print the data in the DemodBuffer - 'x' for hex output"},
411105e0 1644 {"psknexwatchdemod",CmdPSKNexWatch, 1, "Demodulate a NexWatch tag (nexkey, quadrakey) (PSK1) from GraphBuffer"},
e0165dcf 1645 {"rawdemod", CmdRawDemod, 1, "[modulation] ... <options> -see help (h option) -- Demodulate the data in the GraphBuffer and output binary"},
1646 {"samples", CmdSamples, 0, "[512 - 40000] -- Get raw samples for graph window (GraphBuffer)"},
1647 {"save", CmdSave, 1, "<filename> -- Save trace (from graph window)"},
f9f0e83b 1648 {"setgraphmarkers", CmdSetGraphMarkers, 1, "[orange_marker] [blue_marker] (in graph window)"},
e0165dcf 1649 {"scale", CmdScale, 1, "<int> -- Set cursor display scale"},
709665b5 1650 {"setdebugmode", CmdSetDebugMode, 1, "<0|1|2> -- Turn on or off Debugging Level for lf demods"},
e0165dcf 1651 {"shiftgraphzero", CmdGraphShiftZero, 1, "<shift> -- Shift 0 for Graphed wave + or - shift value"},
e0165dcf 1652 {"dirthreshold", CmdDirectionalThreshold, 1, "<thres up> <thres down> -- Max rising higher up-thres/ Min falling lower down-thres, keep rest as prev."},
1653 {"tune", CmdTuneSamples, 0, "Get hw tune samples for graph window"},
1654 {"undec", CmdUndec, 1, "Un-decimate samples by 2"},
1655 {"zerocrossings", CmdZerocrossings, 1, "Count time between zero-crossings"},
1656 {NULL, NULL, 0, NULL}
7fe9b0b7 1657};
1658
1659int CmdData(const char *Cmd)
1660{
e0165dcf 1661 CmdsParse(CommandTable, Cmd);
1662 return 0;
7fe9b0b7 1663}
1664
1665int CmdHelp(const char *Cmd)
1666{
e0165dcf 1667 CmdsHelp(CommandTable);
1668 return 0;
7fe9b0b7 1669}
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