fix 'hf iclass snoop'
[proxmark3-svn] / armsrc / iso15693.c
CommitLineData
15c4dc5a 1//-----------------------------------------------------------------------------
bd20f8f4 2// Jonathan Westhues, split Nov 2006
3// Modified by Greg Jones, Jan 2009
e6304bca 4// Modified by Adrian Dabrowski "atrox", Mar-Sept 2010,Oct 2011
a66f26da 5// Modified by piwi, Oct 2018
bd20f8f4 6//
7// This code is licensed to you under the terms of the GNU GPL, version 2 or,
8// at your option, any later version. See the LICENSE.txt file for the text of
9// the license.
10//-----------------------------------------------------------------------------
15c4dc5a 11// Routines to support ISO 15693. This includes both the reader software and
8c6cca0b 12// the `fake tag' modes.
15c4dc5a 13//-----------------------------------------------------------------------------
8c6cca0b 14
15// The ISO 15693 describes two transmission modes from reader to tag, and four
16// transmission modes from tag to reader. As of Oct 2018 this code supports
17// both reader modes and the high speed variant with one subcarrier from card to reader.
18// As long as the card fully support ISO 15693 this is no problem, since the
a66f26da 19// reader chooses both data rates, but some non-standard tags do not.
8c6cca0b 20// For card simulation, the code supports both high and low speed modes with one subcarrier.
9455b51c 21//
22// VCD (reader) -> VICC (tag)
23// 1 out of 256:
a66f26da 24// data rate: 1,66 kbit/s (fc/8192)
25// used for long range
9455b51c 26// 1 out of 4:
a66f26da 27// data rate: 26,48 kbit/s (fc/512)
28// used for short range, high speed
8c6cca0b 29//
9455b51c 30// VICC (tag) -> VCD (reader)
31// Modulation:
a66f26da 32// ASK / one subcarrier (423,75 khz)
33// FSK / two subcarriers (423,75 khz && 484,28 khz)
9455b51c 34// Data Rates / Modes:
a66f26da 35// low ASK: 6,62 kbit/s
36// low FSK: 6.67 kbit/s
37// high ASK: 26,48 kbit/s
38// high FSK: 26,69 kbit/s
9455b51c 39//-----------------------------------------------------------------------------
9455b51c 40
41
42// Random Remarks:
43// *) UID is always used "transmission order" (LSB), which is reverse to display order
44
45// TODO / BUGS / ISSUES:
8c6cca0b 46// *) signal decoding is unable to detect collisions.
47// *) add anti-collision support for inventory-commands
e6304bca 48// *) read security status of a block
8c6cca0b 49// *) sniffing and simulation do not support two subcarrier modes.
d9de20fa 50// *) remove or refactor code under "deprecated"
9455b51c 51// *) document all the functions
52
d9de20fa 53#include "iso15693.h"
bd20f8f4 54
e30c654b 55#include "proxmark3.h"
f7e3ed82 56#include "util.h"
15c4dc5a 57#include "apps.h"
9ab7a6c7 58#include "string.h"
9455b51c 59#include "iso15693tools.h"
8c6cca0b 60#include "protocols.h"
902cb3c0 61#include "cmd.h"
d9de20fa 62#include "BigBuf.h"
fc52fbd4 63#include "fpgaloader.h"
15c4dc5a 64
15c4dc5a 65#define arraylen(x) (sizeof(x)/sizeof((x)[0]))
66
c41dd5f9 67// Delays in SSP_CLK ticks.
68// SSP_CLK runs at 13,56MHz / 32 = 423.75kHz when simulating a tag
69#define DELAY_READER_TO_ARM 8
70#define DELAY_ARM_TO_READER 0
71//SSP_CLK runs at 13.56MHz / 4 = 3,39MHz when acting as reader. All values should be multiples of 16
c41dd5f9 72#define DELAY_ARM_TO_TAG 16
1ce68968 73#define DELAY_TAG_TO_ARM 32
74//SSP_CLK runs at 13.56MHz / 4 = 3,39MHz when snooping. All values should be multiples of 16
75#define DELAY_TAG_TO_ARM_SNOOP 32
76#define DELAY_READER_TO_ARM_SNOOP 32
c41dd5f9 77
70b2fc0a 78static int DEBUG = 0;
79
c41dd5f9 80
81// specific LogTrace function for ISO15693: the duration needs to be scaled because otherwise it won't fit into a uint16_t
82bool LogTrace_ISO15693(const uint8_t *btBytes, uint16_t iLen, uint32_t timestamp_start, uint32_t timestamp_end, uint8_t *parity, bool readerToTag) {
83 uint32_t duration = timestamp_end - timestamp_start;
84 duration /= 32;
85 timestamp_end = timestamp_start + duration;
86 return LogTrace(btBytes, iLen, timestamp_start, timestamp_end, parity, readerToTag);
87}
88
89
9455b51c 90///////////////////////////////////////////////////////////////////////
91// ISO 15693 Part 2 - Air Interface
3d2c9c9b 92// This section basically contains transmission and receiving of bits
9455b51c 93///////////////////////////////////////////////////////////////////////
94
8c6cca0b 95// buffers
3d2c9c9b 96#define ISO15693_DMA_BUFFER_SIZE 2048 // must be a power of 2
d9de20fa 97#define ISO15693_MAX_RESPONSE_LENGTH 36 // allows read single block with the maximum block size of 256bits. Read multiple blocks not supported yet
98#define ISO15693_MAX_COMMAND_LENGTH 45 // allows write single block with the maximum block size of 256bits. Write multiple blocks not supported yet
8c6cca0b 99
9455b51c 100// ---------------------------
8c6cca0b 101// Signal Processing
9455b51c 102// ---------------------------
103
104// prepare data using "1 out of 4" code for later transmission
8c6cca0b 105// resulting data rate is 26.48 kbit/s (fc/512)
9455b51c 106// cmd ... data
107// n ... length of data
c41dd5f9 108void CodeIso15693AsReader(uint8_t *cmd, int n) {
15c4dc5a 109
110 ToSendReset();
111
9455b51c 112 // SOF for 1of4
c41dd5f9 113 ToSend[++ToSendMax] = 0x84; //10000100
114
115 // data
116 for (int i = 0; i < n; i++) {
117 for (int j = 0; j < 8; j += 2) {
118 int these = (cmd[i] >> j) & 0x03;
15c4dc5a 119 switch(these) {
120 case 0:
c41dd5f9 121 ToSend[++ToSendMax] = 0x40; //01000000
15c4dc5a 122 break;
123 case 1:
c41dd5f9 124 ToSend[++ToSendMax] = 0x10; //00010000
15c4dc5a 125 break;
126 case 2:
c41dd5f9 127 ToSend[++ToSendMax] = 0x04; //00000100
15c4dc5a 128 break;
129 case 3:
c41dd5f9 130 ToSend[++ToSendMax] = 0x01; //00000001
15c4dc5a 131 break;
132 }
133 }
134 }
a66f26da 135
c41dd5f9 136 // EOF
137 ToSend[++ToSendMax] = 0x20; //0010 + 0000 padding
ece38ef3 138
bdf96aae 139 ToSendMax++;
15c4dc5a 140}
141
70b2fc0a 142// encode data using "1 out of 256" scheme
8c6cca0b 143// data rate is 1,66 kbit/s (fc/8192)
9455b51c 144// is designed for more robust communication over longer distances
145static void CodeIso15693AsReader256(uint8_t *cmd, int n)
15c4dc5a 146{
9455b51c 147 ToSendReset();
148
9455b51c 149 // SOF for 1of256
c41dd5f9 150 ToSend[++ToSendMax] = 0x81; //10000001
151
152 // data
153 for(int i = 0; i < n; i++) {
154 for (int j = 0; j <= 255; j++) {
155 if (cmd[i] == j) {
9455b51c 156 ToSendStuffBit(0);
9455b51c 157 ToSendStuffBit(1);
c41dd5f9 158 } else {
159 ToSendStuffBit(0);
160 ToSendStuffBit(0);
8c6cca0b 161 }
162 }
15c4dc5a 163 }
c41dd5f9 164
9455b51c 165 // EOF
c41dd5f9 166 ToSend[++ToSendMax] = 0x20; //0010 + 0000 padding
8c6cca0b 167
168 ToSendMax++;
169}
170
171
3d2c9c9b 172// static uint8_t encode4Bits(const uint8_t b) {
173 // uint8_t c = b & 0xF;
174 // // OTA, the least significant bits first
175 // // The columns are
176 // // 1 - Bit value to send
177 // // 2 - Reversed (big-endian)
178 // // 3 - Manchester Encoded
179 // // 4 - Hex values
180
181 // switch(c){
182 // // 1 2 3 4
183 // case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55
184 // case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95
185 // case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65
186 // case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5
187 // case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59
188 // case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99
189 // case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69
190 // case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9
191 // case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56
192 // case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96
193 // case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66
194 // case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6
195 // case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a
196 // case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a
197 // case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a
198 // default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa
199
200 // }
201// }
202
8efd0b80 203static const uint8_t encode_4bits[16] = { 0xaa, 0x6a, 0x9a, 0x5a, 0xa6, 0x66, 0x96, 0x56, 0xa9, 0x69, 0x99, 0x59, 0xa5, 0x65, 0x95, 0x55 };
204
3d2c9c9b 205void CodeIso15693AsTag(uint8_t *cmd, size_t len) {
206 /*
207 * SOF comprises 3 parts;
208 * * An unmodulated time of 56.64 us
209 * * 24 pulses of 423.75 kHz (fc/32)
210 * * A logic 1, which starts with an unmodulated time of 18.88us
211 * followed by 8 pulses of 423.75kHz (fc/32)
212 *
213 * EOF comprises 3 parts:
214 * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated
215 * time of 18.88us.
216 * - 24 pulses of fc/32
217 * - An unmodulated time of 56.64 us
218 *
219 * A logic 0 starts with 8 pulses of fc/32
220 * followed by an unmodulated time of 256/fc (~18,88us).
221 *
222 * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by
223 * 8 pulses of fc/32 (also 18.88us)
224 *
225 * A bit here becomes 8 pulses of fc/32. Therefore:
226 * The SOF can be written as 00011101 = 0x1D
227 * The EOF can be written as 10111000 = 0xb8
228 * A logic 1 is 01
229 * A logic 0 is 10
230 *
231 * */
232
8c6cca0b 233 ToSendReset();
234
235 // SOF
3d2c9c9b 236 ToSend[++ToSendMax] = 0x1D; // 00011101
8c6cca0b 237
238 // data
8efd0b80 239 for (int i = 0; i < len; i++) {
240 ToSend[++ToSendMax] = encode_4bits[cmd[i] & 0xF];
241 ToSend[++ToSendMax] = encode_4bits[cmd[i] >> 4];
8c6cca0b 242 }
243
244 // EOF
3d2c9c9b 245 ToSend[++ToSendMax] = 0xB8; // 10111000
8c6cca0b 246
247 ToSendMax++;
15c4dc5a 248}
249
9455b51c 250
70b2fc0a 251// Transmit the command (to the tag) that was placed in cmd[].
c41dd5f9 252void TransmitTo15693Tag(const uint8_t *cmd, int len, uint32_t *start_time) {
253
5ea2a248 254 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_FULL_MOD);
ece38ef3 255
256 if (*start_time < DELAY_ARM_TO_TAG) {
257 *start_time = DELAY_ARM_TO_TAG;
258 }
259
c41dd5f9 260 *start_time = (*start_time - DELAY_ARM_TO_TAG) & 0xfffffff0;
261
496bb4be 262 if (GetCountSspClk() > *start_time) { // we may miss the intended time
263 *start_time = (GetCountSspClk() + 16) & 0xfffffff0; // next possible time
c41dd5f9 264 }
15c4dc5a 265
c41dd5f9 266 while (GetCountSspClk() < *start_time)
267 /* wait */ ;
d9de20fa 268
70b2fc0a 269 LED_B_ON();
c41dd5f9 270 for (int c = 0; c < len; c++) {
5ea2a248 271 uint8_t data = cmd[c];
272 for (int i = 0; i < 8; i++) {
c41dd5f9 273 uint16_t send_word = (data & 0x80) ? 0xffff : 0x0000;
5ea2a248 274 while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ;
275 AT91C_BASE_SSC->SSC_THR = send_word;
276 while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ;
277 AT91C_BASE_SSC->SSC_THR = send_word;
c41dd5f9 278
5ea2a248 279 data <<= 1;
280 }
281 WDT_HIT();
282 }
70b2fc0a 283 LED_B_OFF();
ece38ef3 284
c41dd5f9 285 *start_time = *start_time + DELAY_ARM_TO_TAG;
286
15c4dc5a 287}
288
5ea2a248 289
15c4dc5a 290//-----------------------------------------------------------------------------
8c6cca0b 291// Transmit the tag response (to the reader) that was placed in cmd[].
15c4dc5a 292//-----------------------------------------------------------------------------
8efd0b80 293void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t *start_time, uint32_t slot_time, bool slow) {
8c6cca0b 294 // don't use the FPGA_HF_SIMULATOR_MODULATE_424K_8BIT minor mode. It would spoil GetCountSspClk()
70b2fc0a 295 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K);
15c4dc5a 296
c41dd5f9 297 uint32_t modulation_start_time = *start_time - DELAY_ARM_TO_READER + 3 * 8; // no need to transfer the unmodulated start of SOF
ece38ef3 298
8efd0b80 299 while (GetCountSspClk() > (modulation_start_time & 0xfffffff8) + 3) { // we will miss the intended time
300 if (slot_time) {
301 modulation_start_time += slot_time; // use next available slot
302 } else {
303 modulation_start_time = (modulation_start_time & 0xfffffff8) + 8; // next possible time
304 }
305 }
306
ece38ef3 307 while (GetCountSspClk() < (modulation_start_time & 0xfffffff8))
8efd0b80 308 /* wait */ ;
8c6cca0b 309
8efd0b80 310 uint8_t shift_delay = modulation_start_time & 0x00000007;
311
c41dd5f9 312 *start_time = modulation_start_time + DELAY_ARM_TO_READER - 3 * 8;
d9de20fa 313
70b2fc0a 314 LED_C_ON();
8c6cca0b 315 uint8_t bits_to_shift = 0x00;
3d2c9c9b 316 uint8_t bits_to_send = 0x00;
8efd0b80 317 for (size_t c = 0; c < len; c++) {
318 for (int i = (c==0?4:7); i >= 0; i--) {
3d2c9c9b 319 uint8_t cmd_bits = ((cmd[c] >> i) & 0x01) ? 0xff : 0x00;
8c6cca0b 320 for (int j = 0; j < (slow?4:1); ) {
321 if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
a66f26da 322 bits_to_send = bits_to_shift << (8 - shift_delay) | cmd_bits >> shift_delay;
3d2c9c9b 323 AT91C_BASE_SSC->SSC_THR = bits_to_send;
a66f26da 324 bits_to_shift = cmd_bits;
8c6cca0b 325 j++;
326 }
8c6cca0b 327 }
a66f26da 328 }
3d2c9c9b 329 WDT_HIT();
a66f26da 330 }
3d2c9c9b 331 // send the remaining bits, padded with 0:
332 bits_to_send = bits_to_shift << (8 - shift_delay);
333 for ( ; ; ) {
334 if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) {
335 AT91C_BASE_SSC->SSC_THR = bits_to_send;
336 break;
337 }
338 }
70b2fc0a 339 LED_C_OFF();
15c4dc5a 340}
341
9455b51c 342
70b2fc0a 343//=============================================================================
8c6cca0b 344// An ISO 15693 decoder for tag responses (one subcarrier only).
d9de20fa 345// Uses cross correlation to identify each bit and EOF.
70b2fc0a 346// This function is called 8 times per bit (every 2 subcarrier cycles).
8c6cca0b 347// Subcarrier frequency fs is 424kHz, 1/fs = 2,36us,
70b2fc0a 348// i.e. function is called every 4,72us
349// LED handling:
350// LED C -> ON once we have received the SOF and are expecting the rest.
351// LED C -> OFF once we have received EOF or are unsynced
352//
353// Returns: true if we received a EOF
354// false if we are still waiting for some more
355//=============================================================================
356
c41dd5f9 357#define NOISE_THRESHOLD 160 // don't try to correlate noise
358#define MAX_PREVIOUS_AMPLITUDE (-1 - NOISE_THRESHOLD)
70b2fc0a 359
8c6cca0b 360typedef struct DecodeTag {
70b2fc0a 361 enum {
d9de20fa 362 STATE_TAG_SOF_LOW,
c41dd5f9 363 STATE_TAG_SOF_RISING_EDGE,
d9de20fa 364 STATE_TAG_SOF_HIGH,
365 STATE_TAG_SOF_HIGH_END,
8c6cca0b 366 STATE_TAG_RECEIVING_DATA,
c41dd5f9 367 STATE_TAG_EOF,
368 STATE_TAG_EOF_TAIL
70b2fc0a 369 } state;
370 int bitCount;
371 int posCount;
372 enum {
373 LOGIC0,
374 LOGIC1,
375 SOF_PART1,
376 SOF_PART2
377 } lastBit;
378 uint16_t shiftReg;
d9de20fa 379 uint16_t max_len;
70b2fc0a 380 uint8_t *output;
381 int len;
382 int sum1, sum2;
c41dd5f9 383 int threshold_sof;
384 int threshold_half;
385 uint16_t previous_amplitude;
8c6cca0b 386} DecodeTag_t;
70b2fc0a 387
d9de20fa 388
1ce68968 389static int inline __attribute__((always_inline)) Handle15693SamplesFromTag(uint16_t amplitude, DecodeTag_t *DecodeTag) {
8c6cca0b 390 switch(DecodeTag->state) {
a66f26da 391 case STATE_TAG_SOF_LOW:
c41dd5f9 392 // waiting for a rising edge
393 if (amplitude > NOISE_THRESHOLD + DecodeTag->previous_amplitude) {
d9de20fa 394 if (DecodeTag->posCount > 10) {
1ce68968 395 DecodeTag->threshold_sof = amplitude - DecodeTag->previous_amplitude; // to be divided by 2
c41dd5f9 396 DecodeTag->threshold_half = 0;
397 DecodeTag->state = STATE_TAG_SOF_RISING_EDGE;
d9de20fa 398 } else {
399 DecodeTag->posCount = 0;
400 }
c41dd5f9 401 } else {
402 DecodeTag->posCount++;
403 DecodeTag->previous_amplitude = amplitude;
15c4dc5a 404 }
d9de20fa 405 break;
a66f26da 406
c41dd5f9 407 case STATE_TAG_SOF_RISING_EDGE:
1ce68968 408 if (amplitude > DecodeTag->threshold_sof + DecodeTag->previous_amplitude) { // edge still rising
409 if (amplitude > DecodeTag->threshold_sof + DecodeTag->threshold_sof) { // steeper edge, take this as time reference
c41dd5f9 410 DecodeTag->posCount = 1;
411 } else {
412 DecodeTag->posCount = 2;
413 }
414 DecodeTag->threshold_sof = (amplitude - DecodeTag->previous_amplitude) / 2;
415 } else {
416 DecodeTag->posCount = 2;
417 DecodeTag->threshold_sof = DecodeTag->threshold_sof/2;
418 }
419 // DecodeTag->posCount = 2;
420 DecodeTag->state = STATE_TAG_SOF_HIGH;
421 break;
ece38ef3 422
d9de20fa 423 case STATE_TAG_SOF_HIGH:
424 // waiting for 10 times high. Take average over the last 8
c41dd5f9 425 if (amplitude > DecodeTag->threshold_sof) {
d9de20fa 426 DecodeTag->posCount++;
427 if (DecodeTag->posCount > 2) {
c41dd5f9 428 DecodeTag->threshold_half += amplitude; // keep track of average high value
d9de20fa 429 }
430 if (DecodeTag->posCount == 10) {
c41dd5f9 431 DecodeTag->threshold_half >>= 2; // (4 times 1/2 average)
d9de20fa 432 DecodeTag->state = STATE_TAG_SOF_HIGH_END;
433 }
434 } else { // high phase was too short
435 DecodeTag->posCount = 1;
ece38ef3 436 DecodeTag->previous_amplitude = amplitude;
d9de20fa 437 DecodeTag->state = STATE_TAG_SOF_LOW;
70b2fc0a 438 }
70b2fc0a 439 break;
440
d9de20fa 441 case STATE_TAG_SOF_HIGH_END:
c41dd5f9 442 // check for falling edge
443 if (DecodeTag->posCount == 13 && amplitude < DecodeTag->threshold_sof) {
d9de20fa 444 DecodeTag->lastBit = SOF_PART1; // detected 1st part of SOF (12 samples low and 12 samples high)
445 DecodeTag->shiftReg = 0;
446 DecodeTag->bitCount = 0;
447 DecodeTag->len = 0;
448 DecodeTag->sum1 = amplitude;
8c6cca0b 449 DecodeTag->sum2 = 0;
450 DecodeTag->posCount = 2;
451 DecodeTag->state = STATE_TAG_RECEIVING_DATA;
1ce68968 452 // FpgaDisableTracing(); // DEBUGGING
496bb4be 453 // Dbprintf("amplitude = %d, threshold_sof = %d, threshold_half/4 = %d, previous_amplitude = %d",
454 // amplitude,
455 // DecodeTag->threshold_sof,
456 // DecodeTag->threshold_half/4,
457 // DecodeTag->previous_amplitude); // DEBUGGING
70b2fc0a 458 LED_C_ON();
d9de20fa 459 } else {
460 DecodeTag->posCount++;
461 if (DecodeTag->posCount > 13) { // high phase too long
462 DecodeTag->posCount = 0;
ece38ef3 463 DecodeTag->previous_amplitude = amplitude;
d9de20fa 464 DecodeTag->state = STATE_TAG_SOF_LOW;
465 LED_C_OFF();
466 }
70b2fc0a 467 }
70b2fc0a 468 break;
15c4dc5a 469
8c6cca0b 470 case STATE_TAG_RECEIVING_DATA:
1ce68968 471 // FpgaDisableTracing(); // DEBUGGING
472 // Dbprintf("amplitude = %d, threshold_sof = %d, threshold_half/4 = %d, previous_amplitude = %d",
473 // amplitude,
474 // DecodeTag->threshold_sof,
475 // DecodeTag->threshold_half/4,
476 // DecodeTag->previous_amplitude); // DEBUGGING
8c6cca0b 477 if (DecodeTag->posCount == 1) {
478 DecodeTag->sum1 = 0;
479 DecodeTag->sum2 = 0;
70b2fc0a 480 }
8c6cca0b 481 if (DecodeTag->posCount <= 4) {
d9de20fa 482 DecodeTag->sum1 += amplitude;
70b2fc0a 483 } else {
d9de20fa 484 DecodeTag->sum2 += amplitude;
70b2fc0a 485 }
8c6cca0b 486 if (DecodeTag->posCount == 8) {
c41dd5f9 487 if (DecodeTag->sum1 > DecodeTag->threshold_half && DecodeTag->sum2 > DecodeTag->threshold_half) { // modulation in both halves
d9de20fa 488 if (DecodeTag->lastBit == LOGIC0) { // this was already part of EOF
489 DecodeTag->state = STATE_TAG_EOF;
490 } else {
491 DecodeTag->posCount = 0;
ece38ef3 492 DecodeTag->previous_amplitude = amplitude;
d9de20fa 493 DecodeTag->state = STATE_TAG_SOF_LOW;
494 LED_C_OFF();
495 }
c41dd5f9 496 } else if (DecodeTag->sum1 < DecodeTag->threshold_half && DecodeTag->sum2 > DecodeTag->threshold_half) { // modulation in second half
70b2fc0a 497 // logic 1
8c6cca0b 498 if (DecodeTag->lastBit == SOF_PART1) { // still part of SOF
d9de20fa 499 DecodeTag->lastBit = SOF_PART2; // SOF completed
70b2fc0a 500 } else {
8c6cca0b 501 DecodeTag->lastBit = LOGIC1;
502 DecodeTag->shiftReg >>= 1;
503 DecodeTag->shiftReg |= 0x80;
504 DecodeTag->bitCount++;
505 if (DecodeTag->bitCount == 8) {
506 DecodeTag->output[DecodeTag->len] = DecodeTag->shiftReg;
507 DecodeTag->len++;
c41dd5f9 508 // if (DecodeTag->shiftReg == 0x12 && DecodeTag->len == 1) FpgaDisableTracing(); // DEBUGGING
d9de20fa 509 if (DecodeTag->len > DecodeTag->max_len) {
510 // buffer overflow, give up
d9de20fa 511 LED_C_OFF();
c41dd5f9 512 return true;
d9de20fa 513 }
8c6cca0b 514 DecodeTag->bitCount = 0;
515 DecodeTag->shiftReg = 0;
70b2fc0a 516 }
517 }
c41dd5f9 518 } else if (DecodeTag->sum1 > DecodeTag->threshold_half && DecodeTag->sum2 < DecodeTag->threshold_half) { // modulation in first half
70b2fc0a 519 // logic 0
8c6cca0b 520 if (DecodeTag->lastBit == SOF_PART1) { // incomplete SOF
d9de20fa 521 DecodeTag->posCount = 0;
ece38ef3 522 DecodeTag->previous_amplitude = amplitude;
d9de20fa 523 DecodeTag->state = STATE_TAG_SOF_LOW;
70b2fc0a 524 LED_C_OFF();
525 } else {
8c6cca0b 526 DecodeTag->lastBit = LOGIC0;
527 DecodeTag->shiftReg >>= 1;
528 DecodeTag->bitCount++;
529 if (DecodeTag->bitCount == 8) {
530 DecodeTag->output[DecodeTag->len] = DecodeTag->shiftReg;
531 DecodeTag->len++;
c41dd5f9 532 // if (DecodeTag->shiftReg == 0x12 && DecodeTag->len == 1) FpgaDisableTracing(); // DEBUGGING
d9de20fa 533 if (DecodeTag->len > DecodeTag->max_len) {
534 // buffer overflow, give up
535 DecodeTag->posCount = 0;
ece38ef3 536 DecodeTag->previous_amplitude = amplitude;
d9de20fa 537 DecodeTag->state = STATE_TAG_SOF_LOW;
538 LED_C_OFF();
539 }
8c6cca0b 540 DecodeTag->bitCount = 0;
541 DecodeTag->shiftReg = 0;
70b2fc0a 542 }
543 }
c41dd5f9 544 } else { // no modulation
545 if (DecodeTag->lastBit == SOF_PART2) { // only SOF (this is OK for iClass)
546 LED_C_OFF();
547 return true;
548 } else {
549 DecodeTag->posCount = 0;
550 DecodeTag->state = STATE_TAG_SOF_LOW;
551 LED_C_OFF();
552 }
70b2fc0a 553 }
8c6cca0b 554 DecodeTag->posCount = 0;
70b2fc0a 555 }
8c6cca0b 556 DecodeTag->posCount++;
70b2fc0a 557 break;
8c6cca0b 558
d9de20fa 559 case STATE_TAG_EOF:
560 if (DecodeTag->posCount == 1) {
561 DecodeTag->sum1 = 0;
562 DecodeTag->sum2 = 0;
563 }
564 if (DecodeTag->posCount <= 4) {
565 DecodeTag->sum1 += amplitude;
70b2fc0a 566 } else {
d9de20fa 567 DecodeTag->sum2 += amplitude;
70b2fc0a 568 }
d9de20fa 569 if (DecodeTag->posCount == 8) {
c41dd5f9 570 if (DecodeTag->sum1 > DecodeTag->threshold_half && DecodeTag->sum2 < DecodeTag->threshold_half) { // modulation in first half
d9de20fa 571 DecodeTag->posCount = 0;
c41dd5f9 572 DecodeTag->state = STATE_TAG_EOF_TAIL;
573 } else {
574 DecodeTag->posCount = 0;
ece38ef3 575 DecodeTag->previous_amplitude = amplitude;
d9de20fa 576 DecodeTag->state = STATE_TAG_SOF_LOW;
577 LED_C_OFF();
c41dd5f9 578 }
579 }
580 DecodeTag->posCount++;
581 break;
582
583 case STATE_TAG_EOF_TAIL:
584 if (DecodeTag->posCount == 1) {
585 DecodeTag->sum1 = 0;
586 DecodeTag->sum2 = 0;
587 }
588 if (DecodeTag->posCount <= 4) {
589 DecodeTag->sum1 += amplitude;
590 } else {
591 DecodeTag->sum2 += amplitude;
592 }
593 if (DecodeTag->posCount == 8) {
594 if (DecodeTag->sum1 < DecodeTag->threshold_half && DecodeTag->sum2 < DecodeTag->threshold_half) { // no modulation in both halves
d9de20fa 595 LED_C_OFF();
596 return true;
c41dd5f9 597 } else {
598 DecodeTag->posCount = 0;
ece38ef3 599 DecodeTag->previous_amplitude = amplitude;
c41dd5f9 600 DecodeTag->state = STATE_TAG_SOF_LOW;
601 LED_C_OFF();
d9de20fa 602 }
603 }
604 DecodeTag->posCount++;
70b2fc0a 605 break;
15c4dc5a 606 }
15c4dc5a 607
70b2fc0a 608 return false;
609}
15c4dc5a 610
15c4dc5a 611
ece38ef3 612static void DecodeTagInit(DecodeTag_t *DecodeTag, uint8_t *data, uint16_t max_len) {
c41dd5f9 613 DecodeTag->previous_amplitude = MAX_PREVIOUS_AMPLITUDE;
d9de20fa 614 DecodeTag->posCount = 0;
615 DecodeTag->state = STATE_TAG_SOF_LOW;
8c6cca0b 616 DecodeTag->output = data;
d9de20fa 617 DecodeTag->max_len = max_len;
618}
619
620
ece38ef3 621static void DecodeTagReset(DecodeTag_t *DecodeTag) {
d9de20fa 622 DecodeTag->posCount = 0;
623 DecodeTag->state = STATE_TAG_SOF_LOW;
c41dd5f9 624 DecodeTag->previous_amplitude = MAX_PREVIOUS_AMPLITUDE;
70b2fc0a 625}
626
d9de20fa 627
70b2fc0a 628/*
8c6cca0b 629 * Receive and decode the tag response, also log to tracebuffer
70b2fc0a 630 */
c41dd5f9 631int GetIso15693AnswerFromTag(uint8_t* response, uint16_t max_len, uint16_t timeout, uint32_t *eof_time) {
632
d9de20fa 633 int samples = 0;
c41dd5f9 634 int ret = 0;
70b2fc0a 635
c41dd5f9 636 uint16_t dmaBuf[ISO15693_DMA_BUFFER_SIZE];
a66f26da 637
8c6cca0b 638 // the Decoder data structure
d9de20fa 639 DecodeTag_t DecodeTag = { 0 };
640 DecodeTagInit(&DecodeTag, response, max_len);
70b2fc0a 641
642 // wait for last transfer to complete
643 while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY));
644
645 // And put the FPGA in the appropriate mode
5ea2a248 646 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_424_KHZ | FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE);
70b2fc0a 647
648 // Setup and start DMA.
5ea2a248 649 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
70b2fc0a 650 FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
c41dd5f9 651 uint32_t dma_start_time = 0;
70b2fc0a 652 uint16_t *upTo = dmaBuf;
70b2fc0a 653
654 for(;;) {
d9de20fa 655 uint16_t behindBy = ((uint16_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1);
70b2fc0a 656
d9de20fa 657 if (behindBy == 0) continue;
8c6cca0b 658
c41dd5f9 659 samples++;
660 if (samples == 1) {
ece38ef3 661 // DMA has transferred the very first data
c41dd5f9 662 dma_start_time = GetCountSspClk() & 0xfffffff0;
663 }
ece38ef3 664
d9de20fa 665 uint16_t tagdata = *upTo++;
70b2fc0a 666
70b2fc0a 667 if(upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content.
668 upTo = dmaBuf; // start reading the circular buffer from the beginning
1ce68968 669 if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) {
d9de20fa 670 Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy);
c41dd5f9 671 ret = -1;
d9de20fa 672 break;
673 }
15c4dc5a 674 }
70b2fc0a 675 if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated.
676 AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and
677 AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers
15c4dc5a 678 }
d9de20fa 679
d9de20fa 680 if (Handle15693SamplesFromTag(tagdata, &DecodeTag)) {
c41dd5f9 681 *eof_time = dma_start_time + samples*16 - DELAY_TAG_TO_ARM; // end of EOF
682 if (DecodeTag.lastBit == SOF_PART2) {
683 *eof_time -= 8*16; // needed 8 additional samples to confirm single SOF (iCLASS)
684 }
685 if (DecodeTag.len > DecodeTag.max_len) {
686 ret = -2; // buffer overflow
687 }
70b2fc0a 688 break;
689 }
15c4dc5a 690
d9de20fa 691 if (samples > timeout && DecodeTag.state < STATE_TAG_RECEIVING_DATA) {
ece38ef3 692 ret = -1; // timeout
70b2fc0a 693 break;
694 }
8c6cca0b 695
70b2fc0a 696 }
697
698 FpgaDisableSscDma();
a66f26da 699
c41dd5f9 700 if (DEBUG) Dbprintf("samples = %d, ret = %d, Decoder: state = %d, lastBit = %d, len = %d, bitCount = %d, posCount = %d",
701 samples, ret, DecodeTag.state, DecodeTag.lastBit, DecodeTag.len, DecodeTag.bitCount, DecodeTag.posCount);
70b2fc0a 702
c41dd5f9 703 if (ret < 0) {
704 return ret;
70b2fc0a 705 }
706
c41dd5f9 707 uint32_t sof_time = *eof_time
708 - DecodeTag.len * 8 * 8 * 16 // time for byte transfers
709 - 32 * 16 // time for SOF transfer
710 - (DecodeTag.lastBit != SOF_PART2?32*16:0); // time for EOF transfer
ece38ef3 711
c41dd5f9 712 if (DEBUG) Dbprintf("timing: sof_time = %d, eof_time = %d", sof_time, *eof_time);
ece38ef3 713
c41dd5f9 714 LogTrace_ISO15693(DecodeTag.output, DecodeTag.len, sof_time*4, *eof_time*4, NULL, false);
715
8c6cca0b 716 return DecodeTag.len;
15c4dc5a 717}
718
9455b51c 719
8c6cca0b 720//=============================================================================
721// An ISO15693 decoder for reader commands.
722//
723// This function is called 4 times per bit (every 2 subcarrier cycles).
724// Subcarrier frequency fs is 848kHz, 1/fs = 1,18us, i.e. function is called every 2,36us
725// LED handling:
726// LED B -> ON once we have received the SOF and are expecting the rest.
727// LED B -> OFF once we have received EOF or are in error state or unsynced
728//
729// Returns: true if we received a EOF
730// false if we are still waiting for some more
731//=============================================================================
732
733typedef struct DecodeReader {
734 enum {
735 STATE_READER_UNSYNCD,
5b12974a 736 STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF,
8c6cca0b 737 STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF,
738 STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF,
739 STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF,
740 STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4,
741 STATE_READER_RECEIVE_DATA_1_OUT_OF_4,
742 STATE_READER_RECEIVE_DATA_1_OUT_OF_256
743 } state;
744 enum {
745 CODING_1_OUT_OF_4,
746 CODING_1_OUT_OF_256
747 } Coding;
748 uint8_t shiftReg;
749 uint8_t bitCount;
750 int byteCount;
751 int byteCountMax;
752 int posCount;
a66f26da 753 int sum1, sum2;
8c6cca0b 754 uint8_t *output;
755} DecodeReader_t;
756
757
d9de20fa 758static void DecodeReaderInit(DecodeReader_t* DecodeReader, uint8_t *data, uint16_t max_len)
759{
760 DecodeReader->output = data;
761 DecodeReader->byteCountMax = max_len;
762 DecodeReader->state = STATE_READER_UNSYNCD;
763 DecodeReader->byteCount = 0;
764 DecodeReader->bitCount = 0;
765 DecodeReader->posCount = 1;
766 DecodeReader->shiftReg = 0;
767}
768
769
770static void DecodeReaderReset(DecodeReader_t* DecodeReader)
771{
772 DecodeReader->state = STATE_READER_UNSYNCD;
773}
774
775
776static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uint8_t bit, DecodeReader_t *restrict DecodeReader)
15c4dc5a 777{
3d2c9c9b 778 switch (DecodeReader->state) {
8c6cca0b 779 case STATE_READER_UNSYNCD:
5b12974a 780 // wait for unmodulated carrier
781 if (bit) {
782 DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
783 }
784 break;
785
786 case STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF:
3d2c9c9b 787 if (!bit) {
8c6cca0b 788 // we went low, so this could be the beginning of a SOF
8c6cca0b 789 DecodeReader->posCount = 1;
d9de20fa 790 DecodeReader->state = STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF;
8c6cca0b 791 }
792 break;
15c4dc5a 793
8c6cca0b 794 case STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF:
795 DecodeReader->posCount++;
3d2c9c9b 796 if (bit) { // detected rising edge
797 if (DecodeReader->posCount < 4) { // rising edge too early (nominally expected at 5)
5b12974a 798 DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
8c6cca0b 799 } else { // SOF
800 DecodeReader->state = STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF;
801 }
802 } else {
3d2c9c9b 803 if (DecodeReader->posCount > 5) { // stayed low for too long
d9de20fa 804 DecodeReaderReset(DecodeReader);
8c6cca0b 805 } else {
806 // do nothing, keep waiting
807 }
808 }
809 break;
810
811 case STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF:
812 DecodeReader->posCount++;
3d2c9c9b 813 if (!bit) { // detected a falling edge
8c6cca0b 814 if (DecodeReader->posCount < 20) { // falling edge too early (nominally expected at 21 earliest)
d9de20fa 815 DecodeReaderReset(DecodeReader);
8c6cca0b 816 } else if (DecodeReader->posCount < 23) { // SOF for 1 out of 4 coding
817 DecodeReader->Coding = CODING_1_OUT_OF_4;
818 DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF;
819 } else if (DecodeReader->posCount < 28) { // falling edge too early (nominally expected at 29 latest)
d9de20fa 820 DecodeReaderReset(DecodeReader);
5b12974a 821 } else { // SOF for 1 out of 256 coding
8c6cca0b 822 DecodeReader->Coding = CODING_1_OUT_OF_256;
823 DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF;
824 }
825 } else {
3d2c9c9b 826 if (DecodeReader->posCount > 29) { // stayed high for too long
5b12974a 827 DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
8c6cca0b 828 } else {
829 // do nothing, keep waiting
830 }
831 }
832 break;
833
834 case STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF:
835 DecodeReader->posCount++;
836 if (bit) { // detected rising edge
837 if (DecodeReader->Coding == CODING_1_OUT_OF_256) {
838 if (DecodeReader->posCount < 32) { // rising edge too early (nominally expected at 33)
5b12974a 839 DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
8c6cca0b 840 } else {
841 DecodeReader->posCount = 1;
842 DecodeReader->bitCount = 0;
843 DecodeReader->byteCount = 0;
844 DecodeReader->sum1 = 1;
845 DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_256;
846 LED_B_ON();
847 }
848 } else { // CODING_1_OUT_OF_4
849 if (DecodeReader->posCount < 24) { // rising edge too early (nominally expected at 25)
5b12974a 850 DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF;
8c6cca0b 851 } else {
5b12974a 852 DecodeReader->posCount = 1;
8c6cca0b 853 DecodeReader->state = STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4;
854 }
855 }
856 } else {
857 if (DecodeReader->Coding == CODING_1_OUT_OF_256) {
858 if (DecodeReader->posCount > 34) { // signal stayed low for too long
5b12974a 859 DecodeReaderReset(DecodeReader);
8c6cca0b 860 } else {
861 // do nothing, keep waiting
862 }
863 } else { // CODING_1_OUT_OF_4
864 if (DecodeReader->posCount > 26) { // signal stayed low for too long
5b12974a 865 DecodeReaderReset(DecodeReader);
8c6cca0b 866 } else {
867 // do nothing, keep waiting
868 }
869 }
870 }
871 break;
872
873 case STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4:
874 DecodeReader->posCount++;
875 if (bit) {
5b12974a 876 if (DecodeReader->posCount == 9) {
8c6cca0b 877 DecodeReader->posCount = 1;
878 DecodeReader->bitCount = 0;
879 DecodeReader->byteCount = 0;
880 DecodeReader->sum1 = 1;
881 DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_4;
882 LED_B_ON();
883 } else {
884 // do nothing, keep waiting
885 }
886 } else { // unexpected falling edge
d9de20fa 887 DecodeReaderReset(DecodeReader);
8c6cca0b 888 }
889 break;
890
891 case STATE_READER_RECEIVE_DATA_1_OUT_OF_4:
e49d31c0 892 bit = !!bit;
8c6cca0b 893 DecodeReader->posCount++;
894 if (DecodeReader->posCount == 1) {
895 DecodeReader->sum1 = bit;
896 } else if (DecodeReader->posCount <= 4) {
897 DecodeReader->sum1 += bit;
898 } else if (DecodeReader->posCount == 5) {
899 DecodeReader->sum2 = bit;
900 } else {
901 DecodeReader->sum2 += bit;
902 }
903 if (DecodeReader->posCount == 8) {
904 DecodeReader->posCount = 0;
e49d31c0 905 if (DecodeReader->sum1 <= 1 && DecodeReader->sum2 >= 3) { // EOF
8c6cca0b 906 LED_B_OFF(); // Finished receiving
d9de20fa 907 DecodeReaderReset(DecodeReader);
8c6cca0b 908 if (DecodeReader->byteCount != 0) {
909 return true;
910 }
911 }
e49d31c0 912 if (DecodeReader->sum1 >= 3 && DecodeReader->sum2 <= 1) { // detected a 2bit position
8c6cca0b 913 DecodeReader->shiftReg >>= 2;
914 DecodeReader->shiftReg |= (DecodeReader->bitCount << 6);
915 }
916 if (DecodeReader->bitCount == 15) { // we have a full byte
917 DecodeReader->output[DecodeReader->byteCount++] = DecodeReader->shiftReg;
918 if (DecodeReader->byteCount > DecodeReader->byteCountMax) {
919 // buffer overflow, give up
920 LED_B_OFF();
d9de20fa 921 DecodeReaderReset(DecodeReader);
8c6cca0b 922 }
923 DecodeReader->bitCount = 0;
d9de20fa 924 DecodeReader->shiftReg = 0;
8c6cca0b 925 } else {
926 DecodeReader->bitCount++;
927 }
928 }
929 break;
930
931 case STATE_READER_RECEIVE_DATA_1_OUT_OF_256:
e49d31c0 932 bit = !!bit;
8c6cca0b 933 DecodeReader->posCount++;
934 if (DecodeReader->posCount == 1) {
935 DecodeReader->sum1 = bit;
936 } else if (DecodeReader->posCount <= 4) {
937 DecodeReader->sum1 += bit;
938 } else if (DecodeReader->posCount == 5) {
939 DecodeReader->sum2 = bit;
940 } else {
941 DecodeReader->sum2 += bit;
942 }
943 if (DecodeReader->posCount == 8) {
944 DecodeReader->posCount = 0;
e49d31c0 945 if (DecodeReader->sum1 <= 1 && DecodeReader->sum2 >= 3) { // EOF
8c6cca0b 946 LED_B_OFF(); // Finished receiving
d9de20fa 947 DecodeReaderReset(DecodeReader);
8c6cca0b 948 if (DecodeReader->byteCount != 0) {
949 return true;
950 }
951 }
e49d31c0 952 if (DecodeReader->sum1 >= 3 && DecodeReader->sum2 <= 1) { // detected the bit position
8c6cca0b 953 DecodeReader->shiftReg = DecodeReader->bitCount;
954 }
955 if (DecodeReader->bitCount == 255) { // we have a full byte
956 DecodeReader->output[DecodeReader->byteCount++] = DecodeReader->shiftReg;
957 if (DecodeReader->byteCount > DecodeReader->byteCountMax) {
958 // buffer overflow, give up
959 LED_B_OFF();
d9de20fa 960 DecodeReaderReset(DecodeReader);
8c6cca0b 961 }
962 }
963 DecodeReader->bitCount++;
964 }
965 break;
966
967 default:
968 LED_B_OFF();
d9de20fa 969 DecodeReaderReset(DecodeReader);
8c6cca0b 970 break;
15c4dc5a 971 }
8c6cca0b 972
973 return false;
974}
975
976
8c6cca0b 977//-----------------------------------------------------------------------------
978// Receive a command (from the reader to us, where we are the simulated tag),
979// and store it in the given buffer, up to the given maximum length. Keeps
980// spinning, waiting for a well-framed command, until either we get one
3d2c9c9b 981// (returns len) or someone presses the pushbutton on the board (returns -1).
8c6cca0b 982//
983// Assume that we're called with the SSC (to the FPGA) and ADC path set
984// correctly.
985//-----------------------------------------------------------------------------
986
3d2c9c9b 987int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time) {
d9de20fa 988 int samples = 0;
8c6cca0b 989 bool gotFrame = false;
990 uint8_t b;
991
3d2c9c9b 992 uint8_t dmaBuf[ISO15693_DMA_BUFFER_SIZE];
8c6cca0b 993
994 // the decoder data structure
6eeb5f1c 995 DecodeReader_t DecodeReader = {0};
d9de20fa 996 DecodeReaderInit(&DecodeReader, received, max_len);
8c6cca0b 997
998 // wait for last transfer to complete
999 while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY));
1000
70b2fc0a 1001 LED_D_OFF();
8c6cca0b 1002 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
15c4dc5a 1003
8c6cca0b 1004 // clear receive register and wait for next transfer
1005 uint32_t temp = AT91C_BASE_SSC->SSC_RHR;
1006 (void) temp;
1007 while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)) ;
15c4dc5a 1008
3d2c9c9b 1009 uint32_t dma_start_time = GetCountSspClk() & 0xfffffff8;
15c4dc5a 1010
8c6cca0b 1011 // Setup and start DMA.
1012 FpgaSetupSscDma(dmaBuf, ISO15693_DMA_BUFFER_SIZE);
1013 uint8_t *upTo = dmaBuf;
15c4dc5a 1014
3d2c9c9b 1015 for (;;) {
d9de20fa 1016 uint16_t behindBy = ((uint8_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1);
70b2fc0a 1017
d9de20fa 1018 if (behindBy == 0) continue;
15c4dc5a 1019
8c6cca0b 1020 b = *upTo++;
3d2c9c9b 1021 if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content.
8c6cca0b 1022 upTo = dmaBuf; // start reading the circular buffer from the beginning
3d2c9c9b 1023 if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) {
d9de20fa 1024 Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy);
1025 break;
1026 }
8c6cca0b 1027 }
1028 if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated.
1029 AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and
1030 AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers
1031 }
15c4dc5a 1032
8c6cca0b 1033 for (int i = 7; i >= 0; i--) {
1034 if (Handle15693SampleFromReader((b >> i) & 0x01, &DecodeReader)) {
c41dd5f9 1035 *eof_time = dma_start_time + samples - DELAY_READER_TO_ARM; // end of EOF
8c6cca0b 1036 gotFrame = true;
9455b51c 1037 break;
1038 }
8c6cca0b 1039 samples++;
15c4dc5a 1040 }
8c6cca0b 1041
1042 if (gotFrame) {
1043 break;
15c4dc5a 1044 }
8c6cca0b 1045
1046 if (BUTTON_PRESS()) {
3d2c9c9b 1047 DecodeReader.byteCount = -1;
8c6cca0b 1048 break;
15c4dc5a 1049 }
15c4dc5a 1050
8c6cca0b 1051 WDT_HIT();
1052 }
1053
8c6cca0b 1054 FpgaDisableSscDma();
a66f26da 1055
d9de20fa 1056 if (DEBUG) Dbprintf("samples = %d, gotFrame = %d, Decoder: state = %d, len = %d, bitCount = %d, posCount = %d",
a66f26da 1057 samples, gotFrame, DecodeReader.state, DecodeReader.byteCount, DecodeReader.bitCount, DecodeReader.posCount);
8c6cca0b 1058
d9de20fa 1059 if (DecodeReader.byteCount > 0) {
a66f26da 1060 uint32_t sof_time = *eof_time
3d2c9c9b 1061 - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128:2048) // time for byte transfers
1062 - 32 // time for SOF transfer
1063 - 16; // time for EOF transfer
c41dd5f9 1064 LogTrace_ISO15693(DecodeReader.output, DecodeReader.byteCount, sof_time*32, *eof_time*32, NULL, true);
8c6cca0b 1065 }
1066
1067 return DecodeReader.byteCount;
15c4dc5a 1068}
1069
9455b51c 1070
d9de20fa 1071// Encode (into the ToSend buffers) an identify request, which is the first
1072// thing that you must send to a tag to get a response.
1073static void BuildIdentifyRequest(void)
1074{
1075 uint8_t cmd[5];
1076
1077 uint16_t crc;
1078 // one sub-carrier, inventory, 1 slot, fast rate
1079 // AFI is at bit 5 (1<<4) when doing an INVENTORY
1080 cmd[0] = (1 << 2) | (1 << 5) | (1 << 1);
1081 // inventory command code
1082 cmd[1] = 0x01;
1083 // no mask
1084 cmd[2] = 0x00;
1085 //Now the CRC
3d2c9c9b 1086 crc = Iso15693Crc(cmd, 3);
d9de20fa 1087 cmd[3] = crc & 0xff;
1088 cmd[4] = crc >> 8;
1089
1090 CodeIso15693AsReader(cmd, sizeof(cmd));
1091}
1092
1093
15c4dc5a 1094//-----------------------------------------------------------------------------
1095// Start to read an ISO 15693 tag. We send an identify request, then wait
1096// for the response. The response is not demodulated, just left in the buffer
1097// so that it can be downloaded to a PC and processed there.
1098//-----------------------------------------------------------------------------
1099void AcquireRawAdcSamplesIso15693(void)
1100{
70b2fc0a 1101 LED_A_ON();
8c6cca0b 1102
117d9ec2 1103 uint8_t *dest = BigBuf_get_addr();
15c4dc5a 1104
7cc204bf 1105 FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
5ea2a248 1106 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER);
ece38ef3 1107 LED_D_ON();
5ea2a248 1108 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
15c4dc5a 1109 SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
1110
5ea2a248 1111 BuildIdentifyRequest();
1112
15c4dc5a 1113 // Give the tags time to energize
15c4dc5a 1114 SpinDelay(100);
1115
1116 // Now send the command
c41dd5f9 1117 uint32_t start_time = 0;
1118 TransmitTo15693Tag(ToSend, ToSendMax, &start_time);
70b2fc0a 1119
1120 // wait for last transfer to complete
5ea2a248 1121 while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)) ;
15c4dc5a 1122
5ea2a248 1123 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_424_KHZ | FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE);
15c4dc5a 1124
70b2fc0a 1125 for(int c = 0; c < 4000; ) {
15c4dc5a 1126 if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
d9de20fa 1127 uint16_t r = AT91C_BASE_SSC->SSC_RHR;
1128 dest[c++] = r >> 5;
9455b51c 1129 }
1130 }
70b2fc0a 1131
1132 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1133 LEDsoff();
9455b51c 1134}
1135
1136
1ce68968 1137void SnoopIso15693(void) {
1138
1523527f 1139 LED_A_ON();
ece38ef3 1140
d9de20fa 1141 FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
8c6cca0b 1142
d9de20fa 1143 clear_trace();
1144 set_tracing(true);
3fe4ff4f 1145
d9de20fa 1146 // The DMA buffer, used to stream samples from the FPGA
1ce68968 1147 uint16_t dmaBuf[ISO15693_DMA_BUFFER_SIZE];
d9de20fa 1148
1149 // Count of samples received so far, so that we can include timing
1150 // information in the trace buffer.
1151 int samples = 0;
1152
1153 DecodeTag_t DecodeTag = {0};
1154 uint8_t response[ISO15693_MAX_RESPONSE_LENGTH];
1155 DecodeTagInit(&DecodeTag, response, sizeof(response));
9455b51c 1156
d9de20fa 1157 DecodeReader_t DecodeReader = {0};;
1158 uint8_t cmd[ISO15693_MAX_COMMAND_LENGTH];
1159 DecodeReaderInit(&DecodeReader, cmd, sizeof(cmd));
1160
1161 // Print some debug information about the buffer sizes
1162 if (DEBUG) {
1163 Dbprintf("Snooping buffers initialized:");
1164 Dbprintf(" Trace: %i bytes", BigBuf_max_traceLen());
1165 Dbprintf(" Reader -> tag: %i bytes", ISO15693_MAX_COMMAND_LENGTH);
1166 Dbprintf(" tag -> Reader: %i bytes", ISO15693_MAX_RESPONSE_LENGTH);
1167 Dbprintf(" DMA: %i bytes", ISO15693_DMA_BUFFER_SIZE * sizeof(uint16_t));
1168 }
5ea2a248 1169 Dbprintf("Snoop started. Press PM3 Button to stop.");
a66f26da 1170
5ea2a248 1171 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE);
1ce68968 1172 LED_D_OFF();
9455b51c 1173 SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
5ea2a248 1174 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
1ce68968 1175 StartCountSspClk();
d9de20fa 1176 FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
1ce68968 1177
d9de20fa 1178 bool TagIsActive = false;
1179 bool ReaderIsActive = false;
1180 bool ExpectTagAnswer = false;
1ce68968 1181 uint32_t dma_start_time = 0;
1182 uint16_t *upTo = dmaBuf;
1183
d9de20fa 1184 // And now we loop, receiving samples.
1185 for(;;) {
1186 uint16_t behindBy = ((uint16_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1);
1187
1188 if (behindBy == 0) continue;
1189
1ce68968 1190 samples++;
1191 if (samples == 1) {
1192 // DMA has transferred the very first data
1193 dma_start_time = GetCountSspClk() & 0xfffffff0;
1194 }
1195
d9de20fa 1196 uint16_t snoopdata = *upTo++;
1197
1ce68968 1198 if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content.
d9de20fa 1199 upTo = dmaBuf; // start reading the circular buffer from the beginning
1ce68968 1200 if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) {
d9de20fa 1201 Dbprintf("About to blow circular buffer - aborted! behindBy=%d, samples=%d", behindBy, samples);
1202 break;
1203 }
1204 if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated.
1205 AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and
1206 AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers
1207 WDT_HIT();
1ce68968 1208 if (BUTTON_PRESS()) {
d9de20fa 1209 DbpString("Snoop stopped.");
1210 break;
1211 }
1212 }
1213 }
a66f26da 1214
d9de20fa 1215 if (!TagIsActive) { // no need to try decoding reader data if the tag is sending
1216 if (Handle15693SampleFromReader(snoopdata & 0x02, &DecodeReader)) {
1ce68968 1217 // FpgaDisableSscDma();
1218 uint32_t eof_time = dma_start_time + samples*16 + 8 - DELAY_READER_TO_ARM_SNOOP; // end of EOF
1219 if (DecodeReader.byteCount > 0) {
1220 uint32_t sof_time = eof_time
1221 - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128*16:2048*16) // time for byte transfers
1222 - 32*16 // time for SOF transfer
1223 - 16*16; // time for EOF transfer
1224 LogTrace_ISO15693(DecodeReader.output, DecodeReader.byteCount, sof_time*4, eof_time*4, NULL, true);
1225 }
d9de20fa 1226 /* And ready to receive another command. */
1227 DecodeReaderReset(&DecodeReader);
1228 /* And also reset the demod code, which might have been */
1229 /* false-triggered by the commands from the reader. */
1230 DecodeTagReset(&DecodeTag);
1ce68968 1231 ReaderIsActive = false;
d9de20fa 1232 ExpectTagAnswer = true;
1ce68968 1233 // upTo = dmaBuf;
1234 // samples = 0;
1235 // FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
1236 // continue;
1237 } else if (Handle15693SampleFromReader(snoopdata & 0x01, &DecodeReader)) {
1238 // FpgaDisableSscDma();
1239 uint32_t eof_time = dma_start_time + samples*16 + 16 - DELAY_READER_TO_ARM_SNOOP; // end of EOF
1240 if (DecodeReader.byteCount > 0) {
1241 uint32_t sof_time = eof_time
1242 - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128*16:2048*16) // time for byte transfers
1243 - 32*16 // time for SOF transfer
1244 - 16*16; // time for EOF transfer
1245 LogTrace_ISO15693(DecodeReader.output, DecodeReader.byteCount, sof_time*4, eof_time*4, NULL, true);
1246 }
d9de20fa 1247 /* And ready to receive another command. */
1248 DecodeReaderReset(&DecodeReader);
1249 /* And also reset the demod code, which might have been */
1250 /* false-triggered by the commands from the reader. */
1251 DecodeTagReset(&DecodeTag);
1ce68968 1252 ReaderIsActive = false;
1253 ExpectTagAnswer = true;
1254 // upTo = dmaBuf;
1255 // samples = 0;
1256 // FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
1257 // continue;
1258 } else {
1259 ReaderIsActive = (DecodeReader.state >= STATE_READER_RECEIVE_DATA_1_OUT_OF_4);
d9de20fa 1260 }
9455b51c 1261 }
d9de20fa 1262
a66f26da 1263 if (!ReaderIsActive && ExpectTagAnswer) { // no need to try decoding tag data if the reader is currently sending or no answer expected yet
d9de20fa 1264 if (Handle15693SamplesFromTag(snoopdata >> 2, &DecodeTag)) {
1ce68968 1265 // FpgaDisableSscDma();
1266 uint32_t eof_time = dma_start_time + samples*16 - DELAY_TAG_TO_ARM_SNOOP; // end of EOF
1267 if (DecodeTag.lastBit == SOF_PART2) {
1268 eof_time -= 8*16; // needed 8 additional samples to confirm single SOF (iCLASS)
1269 }
1270 uint32_t sof_time = eof_time
1271 - DecodeTag.len * 8 * 8 * 16 // time for byte transfers
1272 - 32 * 16 // time for SOF transfer
1273 - (DecodeTag.lastBit != SOF_PART2?32*16:0); // time for EOF transfer
1274 LogTrace_ISO15693(DecodeTag.output, DecodeTag.len, sof_time*4, eof_time*4, NULL, false);
d9de20fa 1275 // And ready to receive another response.
1276 DecodeTagReset(&DecodeTag);
1277 DecodeReaderReset(&DecodeReader);
1278 ExpectTagAnswer = false;
1ce68968 1279 TagIsActive = false;
1280 // upTo = dmaBuf;
1281 // samples = 0;
1282 // FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE);
1283 // continue;
1284 } else {
1285 TagIsActive = (DecodeTag.state >= STATE_TAG_RECEIVING_DATA);
d9de20fa 1286 }
d9de20fa 1287 }
1288
9455b51c 1289 }
70b2fc0a 1290
d9de20fa 1291 FpgaDisableSscDma();
a66f26da 1292
d9de20fa 1293 LEDsoff();
1294
1295 DbpString("Snoop statistics:");
1296 Dbprintf(" ExpectTagAnswer: %d", ExpectTagAnswer);
1297 Dbprintf(" DecodeTag State: %d", DecodeTag.state);
1298 Dbprintf(" DecodeTag byteCnt: %d", DecodeTag.len);
1299 Dbprintf(" DecodeReader State: %d", DecodeReader.state);
1300 Dbprintf(" DecodeReader byteCnt: %d", DecodeReader.byteCount);
1301 Dbprintf(" Trace length: %d", BigBuf_get_traceLen());
9455b51c 1302}
1303
1304
8c6cca0b 1305// Initialize the proxmark as iso15k reader
c41dd5f9 1306void Iso15693InitReader() {
7cc204bf 1307 FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
9455b51c 1308
1309 // Start from off (no field generated)
70b2fc0a 1310 LED_D_OFF();
9455b51c 1311 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
e6304bca 1312 SpinDelay(10);
9455b51c 1313
1314 SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
5ea2a248 1315 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
9455b51c 1316
1317 // Give the tags time to energize
70b2fc0a 1318 LED_D_ON();
5ea2a248 1319 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER);
e6304bca 1320 SpinDelay(250);
9455b51c 1321}
1322
1323///////////////////////////////////////////////////////////////////////
1324// ISO 15693 Part 3 - Air Interface
70b2fc0a 1325// This section basically contains transmission and receiving of bits
9455b51c 1326///////////////////////////////////////////////////////////////////////
1327
9455b51c 1328
1329// uid is in transmission order (which is reverse of display order)
1330static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber )
1331{
1332 uint8_t cmd[13];
1333
1334 uint16_t crc;
d9de20fa 1335 // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
1336 // followed by the block data
a66f26da 1337 cmd[0] = ISO15693_REQ_OPTION | ISO15693_REQ_ADDRESS | ISO15693_REQ_DATARATE_HIGH;
9455b51c 1338 // READ BLOCK command code
d9de20fa 1339 cmd[1] = ISO15693_READBLOCK;
9455b51c 1340 // UID may be optionally specified here
1341 // 64-bit UID
1342 cmd[2] = uid[0];
1343 cmd[3] = uid[1];
1344 cmd[4] = uid[2];
1345 cmd[5] = uid[3];
1346 cmd[6] = uid[4];
1347 cmd[7] = uid[5];
1348 cmd[8] = uid[6];
1349 cmd[9] = uid[7]; // 0xe0; // always e0 (not exactly unique)
1350 // Block number to read
d9de20fa 1351 cmd[10] = blockNumber;
9455b51c 1352 //Now the CRC
3d2c9c9b 1353 crc = Iso15693Crc(cmd, 11); // the crc needs to be calculated over 11 bytes
9455b51c 1354 cmd[11] = crc & 0xff;
1355 cmd[12] = crc >> 8;
1356
1357 CodeIso15693AsReader(cmd, sizeof(cmd));
1358}
1359
70b2fc0a 1360
9455b51c 1361// Now the VICC>VCD responses when we are simulating a tag
8c6cca0b 1362static void BuildInventoryResponse(uint8_t *uid)
9455b51c 1363{
1364 uint8_t cmd[12];
1365
1366 uint16_t crc;
8c6cca0b 1367
1368 cmd[0] = 0; // No error, no protocol format extension
3fe4ff4f 1369 cmd[1] = 0; // DSFID (data storage format identifier). 0x00 = not supported
9455b51c 1370 // 64-bit UID
3fe4ff4f 1371 cmd[2] = uid[7]; //0x32;
1372 cmd[3] = uid[6]; //0x4b;
1373 cmd[4] = uid[5]; //0x03;
1374 cmd[5] = uid[4]; //0x01;
1375 cmd[6] = uid[3]; //0x00;
1376 cmd[7] = uid[2]; //0x10;
1377 cmd[8] = uid[1]; //0x05;
1378 cmd[9] = uid[0]; //0xe0;
9455b51c 1379 //Now the CRC
3d2c9c9b 1380 crc = Iso15693Crc(cmd, 10);
9455b51c 1381 cmd[10] = crc & 0xff;
1382 cmd[11] = crc >> 8;
1383
8c6cca0b 1384 CodeIso15693AsTag(cmd, sizeof(cmd));
9455b51c 1385}
1386
e6304bca 1387// Universal Method for sending to and recv bytes from a tag
a66f26da 1388// init ... should we initialize the reader?
1389// speed ... 0 low speed, 1 hi speed
1390// *recv will contain the tag's answer
c41dd5f9 1391// return: length of received data, or -1 for timeout
1392int SendDataTag(uint8_t *send, int sendlen, bool init, int speed, uint8_t *recv, uint16_t max_recv_len, uint32_t start_time, uint32_t *eof_time) {
9455b51c 1393
c41dd5f9 1394 if (init) {
1395 Iso15693InitReader();
1396 StartCountSspClk();
1397 }
ece38ef3 1398
c41dd5f9 1399 int answerLen = 0;
ece38ef3 1400
9455b51c 1401 if (!speed) {
1402 // low speed (1 out of 256)
1403 CodeIso15693AsReader256(send, sendlen);
1404 } else {
1405 // high speed (1 out of 4)
1406 CodeIso15693AsReader(send, sendlen);
1407 }
8c6cca0b 1408
c41dd5f9 1409 TransmitTo15693Tag(ToSend, ToSendMax, &start_time);
d9de20fa 1410
9455b51c 1411 // Now wait for a response
d9de20fa 1412 if (recv != NULL) {
ece38ef3 1413 answerLen = GetIso15693AnswerFromTag(recv, max_recv_len, ISO15693_READER_TIMEOUT, eof_time);
9455b51c 1414 }
1415
9455b51c 1416 return answerLen;
1417}
15c4dc5a 1418
15c4dc5a 1419
9455b51c 1420// --------------------------------------------------------------------
8c6cca0b 1421// Debug Functions
9455b51c 1422// --------------------------------------------------------------------
15c4dc5a 1423
9455b51c 1424// Decodes a message from a tag and displays its metadata and content
1425#define DBD15STATLEN 48
1426void DbdecodeIso15693Answer(int len, uint8_t *d) {
1427 char status[DBD15STATLEN+1]={0};
1428 uint16_t crc;
1429
d9de20fa 1430 if (len > 3) {
1431 if (d[0] & ISO15693_RES_EXT)
1432 strncat(status,"ProtExt ", DBD15STATLEN);
1433 if (d[0] & ISO15693_RES_ERROR) {
9455b51c 1434 // error
d9de20fa 1435 strncat(status,"Error ", DBD15STATLEN);
9455b51c 1436 switch (d[1]) {
8c6cca0b 1437 case 0x01:
d9de20fa 1438 strncat(status,"01:notSupp", DBD15STATLEN);
15c4dc5a 1439 break;
8c6cca0b 1440 case 0x02:
d9de20fa 1441 strncat(status,"02:notRecog", DBD15STATLEN);
9455b51c 1442 break;
8c6cca0b 1443 case 0x03:
d9de20fa 1444 strncat(status,"03:optNotSupp", DBD15STATLEN);
9455b51c 1445 break;
8c6cca0b 1446 case 0x0f:
d9de20fa 1447 strncat(status,"0f:noInfo", DBD15STATLEN);
9455b51c 1448 break;
8c6cca0b 1449 case 0x10:
d9de20fa 1450 strncat(status,"10:doesn'tExist", DBD15STATLEN);
9455b51c 1451 break;
8c6cca0b 1452 case 0x11:
d9de20fa 1453 strncat(status,"11:lockAgain", DBD15STATLEN);
9455b51c 1454 break;
8c6cca0b 1455 case 0x12:
d9de20fa 1456 strncat(status,"12:locked", DBD15STATLEN);
9455b51c 1457 break;
8c6cca0b 1458 case 0x13:
d9de20fa 1459 strncat(status,"13:progErr", DBD15STATLEN);
9455b51c 1460 break;
8c6cca0b 1461 case 0x14:
d9de20fa 1462 strncat(status,"14:lockErr", DBD15STATLEN);
9455b51c 1463 break;
1464 default:
d9de20fa 1465 strncat(status,"unknownErr", DBD15STATLEN);
15c4dc5a 1466 }
d9de20fa 1467 strncat(status," ", DBD15STATLEN);
9455b51c 1468 } else {
d9de20fa 1469 strncat(status,"NoErr ", DBD15STATLEN);
15c4dc5a 1470 }
8c6cca0b 1471
3d2c9c9b 1472 crc=Iso15693Crc(d,len-2);
8c6cca0b 1473 if ( (( crc & 0xff ) == d[len-2]) && (( crc >> 8 ) == d[len-1]) )
9455b51c 1474 strncat(status,"CrcOK",DBD15STATLEN);
1475 else
8c6cca0b 1476 strncat(status,"CrcFail!",DBD15STATLEN);
9455b51c 1477
1478 Dbprintf("%s",status);
15c4dc5a 1479 }
1480}
1481
9455b51c 1482
1483
1484///////////////////////////////////////////////////////////////////////
1485// Functions called via USB/Client
1486///////////////////////////////////////////////////////////////////////
1487
1488void SetDebugIso15693(uint32_t debug) {
1489 DEBUG=debug;
1490 Dbprintf("Iso15693 Debug is now %s",DEBUG?"on":"off");
1491 return;
1492}
1493
d9de20fa 1494
5ea2a248 1495//---------------------------------------------------------------------------------------
1496// Simulate an ISO15693 reader, perform anti-collision and then attempt to read a sector.
15c4dc5a 1497// all demodulation performed in arm rather than host. - greg
5ea2a248 1498//---------------------------------------------------------------------------------------
ece38ef3 1499void ReaderIso15693(uint32_t parameter) {
1500
15c4dc5a 1501 LED_A_ON();
15c4dc5a 1502
d9de20fa 1503 set_tracing(true);
a66f26da 1504
d9de20fa 1505 int answerLen = 0;
3fe4ff4f 1506 uint8_t TagUID[8] = {0x00};
1507
09ffd16e 1508 FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
15c4dc5a 1509
d9de20fa 1510 uint8_t answer[ISO15693_MAX_RESPONSE_LENGTH];
15c4dc5a 1511
3fe4ff4f 1512 SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
15c4dc5a 1513 // Setup SSC
5ea2a248 1514 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER);
15c4dc5a 1515
1516 // Start from off (no field generated)
a66f26da 1517 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1518 SpinDelay(200);
15c4dc5a 1519
15c4dc5a 1520 // Give the tags time to energize
70b2fc0a 1521 LED_D_ON();
5ea2a248 1522 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER);
15c4dc5a 1523 SpinDelay(200);
d9de20fa 1524 StartCountSspClk();
1525
15c4dc5a 1526
15c4dc5a 1527 // FIRST WE RUN AN INVENTORY TO GET THE TAG UID
1528 // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME
15c4dc5a 1529
1530 // Now send the IDENTIFY command
1531 BuildIdentifyRequest();
c41dd5f9 1532 uint32_t start_time = 0;
1533 TransmitTo15693Tag(ToSend, ToSendMax, &start_time);
a66f26da 1534
15c4dc5a 1535 // Now wait for a response
c41dd5f9 1536 uint32_t eof_time;
1537 answerLen = GetIso15693AnswerFromTag(answer, sizeof(answer), DELAY_ISO15693_VCD_TO_VICC_READER * 2, &eof_time) ;
1538 start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
15c4dc5a 1539
d9de20fa 1540 if (answerLen >=12) // we should do a better check than this
15c4dc5a 1541 {
d9de20fa 1542 TagUID[0] = answer[2];
1543 TagUID[1] = answer[3];
1544 TagUID[2] = answer[4];
1545 TagUID[3] = answer[5];
1546 TagUID[4] = answer[6];
1547 TagUID[5] = answer[7];
1548 TagUID[6] = answer[8]; // IC Manufacturer code
1549 TagUID[7] = answer[9]; // always E0
15c4dc5a 1550
15c4dc5a 1551 }
1552
d9de20fa 1553 Dbprintf("%d octets read from IDENTIFY request:", answerLen);
1554 DbdecodeIso15693Answer(answerLen, answer);
1555 Dbhexdump(answerLen, answer, false);
9455b51c 1556
1557 // UID is reverse
d9de20fa 1558 if (answerLen >= 12)
3fe4ff4f 1559 Dbprintf("UID = %02hX%02hX%02hX%02hX%02hX%02hX%02hX%02hX",
1560 TagUID[7],TagUID[6],TagUID[5],TagUID[4],
1561 TagUID[3],TagUID[2],TagUID[1],TagUID[0]);
9455b51c 1562
1563
315e18e6 1564 // Dbprintf("%d octets read from SELECT request:", answerLen2);
1565 // DbdecodeIso15693Answer(answerLen2,answer2);
1566 // Dbhexdump(answerLen2,answer2,true);
9455b51c 1567
315e18e6 1568 // Dbprintf("%d octets read from XXX request:", answerLen3);
1569 // DbdecodeIso15693Answer(answerLen3,answer3);
1570 // Dbhexdump(answerLen3,answer3,true);
9455b51c 1571
9455b51c 1572 // read all pages
d9de20fa 1573 if (answerLen >= 12 && DEBUG) {
5ea2a248 1574 for (int i = 0; i < 32; i++) { // sanity check, assume max 32 pages
8c6cca0b 1575 BuildReadBlockRequest(TagUID, i);
c41dd5f9 1576 TransmitTo15693Tag(ToSend, ToSendMax, &start_time);
1577 int answerLen = GetIso15693AnswerFromTag(answer, sizeof(answer), DELAY_ISO15693_VCD_TO_VICC_READER * 2, &eof_time);
1578 start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
d9de20fa 1579 if (answerLen > 0) {
1580 Dbprintf("READ SINGLE BLOCK %d returned %d octets:", i, answerLen);
1581 DbdecodeIso15693Answer(answerLen, answer);
1582 Dbhexdump(answerLen, answer, false);
1583 if ( *((uint32_t*) answer) == 0x07160101 ) break; // exit on NoPageErr
8c6cca0b 1584 }
8c6cca0b 1585 }
9455b51c 1586 }
15c4dc5a 1587
8c6cca0b 1588 // for the time being, switch field off to protect rdv4.0
70b2fc0a 1589 // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway
a66f26da 1590 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
15c4dc5a 1591 LED_D_OFF();
8c6cca0b 1592
70b2fc0a 1593 LED_A_OFF();
15c4dc5a 1594}
1595
8c6cca0b 1596
1597// Simulate an ISO15693 TAG.
1598// For Inventory command: print command and send Inventory Response with given UID
1599// TODO: interpret other reader commands and send appropriate response
ece38ef3 1600void SimTagIso15693(uint32_t parameter, uint8_t *uid) {
1601
15c4dc5a 1602 LED_A_ON();
15c4dc5a 1603
7cc204bf 1604 FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
15c4dc5a 1605 SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
a66f26da 1606 FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION);
8c6cca0b 1607 FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR);
15c4dc5a 1608
8c6cca0b 1609 StartCountSspClk();
15c4dc5a 1610
8c6cca0b 1611 uint8_t cmd[ISO15693_MAX_COMMAND_LENGTH];
15c4dc5a 1612
8c6cca0b 1613 // Build a suitable response to the reader INVENTORY command
1614 BuildInventoryResponse(uid);
15c4dc5a 1615
8c6cca0b 1616 // Listen to reader
1617 while (!BUTTON_PRESS()) {
1618 uint32_t eof_time = 0, start_time = 0;
1619 int cmd_len = GetIso15693CommandFromReader(cmd, sizeof(cmd), &eof_time);
1620
1621 if ((cmd_len >= 5) && (cmd[0] & ISO15693_REQ_INVENTORY) && (cmd[1] == ISO15693_INVENTORY)) { // TODO: check more flags
1622 bool slow = !(cmd[0] & ISO15693_REQ_DATARATE_HIGH);
c41dd5f9 1623 start_time = eof_time + DELAY_ISO15693_VCD_TO_VICC_SIM;
8efd0b80 1624 TransmitTo15693Reader(ToSend, ToSendMax, &start_time, 0, slow);
8c6cca0b 1625 }
3fe4ff4f 1626
8c6cca0b 1627 Dbprintf("%d bytes read from reader:", cmd_len);
1628 Dbhexdump(cmd_len, cmd, false);
1629 }
15c4dc5a 1630
a66f26da 1631 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
ece38ef3 1632 LED_D_OFF();
1633 LED_A_OFF();
15c4dc5a 1634}
9455b51c 1635
1636
1637// Since there is no standardized way of reading the AFI out of a tag, we will brute force it
1638// (some manufactures offer a way to read the AFI, though)
8c6cca0b 1639void BruteforceIso15693Afi(uint32_t speed)
1640{
70b2fc0a 1641 LED_A_ON();
8c6cca0b 1642
d9de20fa 1643 uint8_t data[6];
1644 uint8_t recv[ISO15693_MAX_RESPONSE_LENGTH];
c41dd5f9 1645 int datalen = 0, recvlen = 0;
1646 uint32_t eof_time;
a66f26da 1647
9455b51c 1648 // first without AFI
8c6cca0b 1649 // Tags should respond without AFI and with AFI=0 even when AFI is active
1650
1651 data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_SLOT1;
1652 data[1] = ISO15693_INVENTORY;
1653 data[2] = 0; // mask length
3d2c9c9b 1654 datalen = Iso15693AddCrc(data,3);
c41dd5f9 1655 uint32_t start_time = GetCountSspClk();
1656 recvlen = SendDataTag(data, datalen, true, speed, recv, sizeof(recv), 0, &eof_time);
1657 start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
9455b51c 1658 WDT_HIT();
1659 if (recvlen>=12) {
3d2c9c9b 1660 Dbprintf("NoAFI UID=%s", Iso15693sprintUID(NULL, &recv[2]));
9455b51c 1661 }
8c6cca0b 1662
9455b51c 1663 // now with AFI
8c6cca0b 1664
1665 data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_AFI | ISO15693_REQINV_SLOT1;
1666 data[1] = ISO15693_INVENTORY;
1667 data[2] = 0; // AFI
1668 data[3] = 0; // mask length
1669
d9de20fa 1670 for (int i = 0; i < 256; i++) {
1671 data[2] = i & 0xFF;
3d2c9c9b 1672 datalen = Iso15693AddCrc(data,4);
c41dd5f9 1673 recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), start_time, &eof_time);
1674 start_time = eof_time + DELAY_ISO15693_VICC_TO_VCD_READER;
9455b51c 1675 WDT_HIT();
d9de20fa 1676 if (recvlen >= 12) {
3d2c9c9b 1677 Dbprintf("AFI=%i UID=%s", i, Iso15693sprintUID(NULL, &recv[2]));
9455b51c 1678 }
8c6cca0b 1679 }
9455b51c 1680 Dbprintf("AFI Bruteforcing done.");
8c6cca0b 1681
a66f26da 1682 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
ece38ef3 1683 LED_D_OFF();
1684 LED_A_OFF();
1685
9455b51c 1686}
1687
1688// Allows to directly send commands to the tag via the client
70b2fc0a 1689void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]) {
9455b51c 1690
ece38ef3 1691 LED_A_ON();
1692
d9de20fa 1693 int recvlen = 0;
1694 uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH];
c41dd5f9 1695 uint32_t eof_time;
8c6cca0b 1696
9455b51c 1697 if (DEBUG) {
d9de20fa 1698 Dbprintf("SEND:");
8c6cca0b 1699 Dbhexdump(datalen, data, false);
9455b51c 1700 }
8c6cca0b 1701
c41dd5f9 1702 recvlen = SendDataTag(data, datalen, true, speed, (recv?recvbuf:NULL), sizeof(recvbuf), 0, &eof_time);
1703
1704 // for the time being, switch field off to protect rdv4.0
1705 // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway
1706 FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
1707 LED_D_OFF();
9455b51c 1708
8c6cca0b 1709 if (recv) {
9455b51c 1710 if (DEBUG) {
d9de20fa 1711 Dbprintf("RECV:");
c41dd5f9 1712 if (recvlen > 0) {
1713 Dbhexdump(recvlen, recvbuf, false);
1714 DbdecodeIso15693Answer(recvlen, recvbuf);
1715 }
9455b51c 1716 }
c41dd5f9 1717 if (recvlen > ISO15693_MAX_RESPONSE_LENGTH) {
1718 recvlen = ISO15693_MAX_RESPONSE_LENGTH;
1719 }
1720 cmd_send(CMD_ACK, recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH);
9455b51c 1721 }
1722
70b2fc0a 1723 LED_A_OFF();
9455b51c 1724}
1725
096dee17 1726//-----------------------------------------------------------------------------
1727// Work with "magic Chinese" card.
1728//
1729//-----------------------------------------------------------------------------
1730
1731// Set the UID to the tag (based on Iceman work).
ece38ef3 1732void SetTag15693Uid(uint8_t *uid) {
a66f26da 1733
ece38ef3 1734 LED_A_ON();
1735
1736 uint8_t cmd[4][9] = {0x00};
a66f26da 1737 uint16_t crc;
1738
1739 int recvlen = 0;
1740 uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH];
c41dd5f9 1741 uint32_t eof_time;
a66f26da 1742
1743 // Command 1 : 02213E00000000
1744 cmd[0][0] = 0x02;
1745 cmd[0][1] = 0x21;
1746 cmd[0][2] = 0x3e;
1747 cmd[0][3] = 0x00;
1748 cmd[0][4] = 0x00;
1749 cmd[0][5] = 0x00;
1750 cmd[0][6] = 0x00;
1751
1752 // Command 2 : 02213F69960000
1753 cmd[1][0] = 0x02;
1754 cmd[1][1] = 0x21;
1755 cmd[1][2] = 0x3f;
1756 cmd[1][3] = 0x69;
1757 cmd[1][4] = 0x96;
1758 cmd[1][5] = 0x00;
1759 cmd[1][6] = 0x00;
1760
1761 // Command 3 : 022138u8u7u6u5 (where uX = uid byte X)
1762 cmd[2][0] = 0x02;
1763 cmd[2][1] = 0x21;
1764 cmd[2][2] = 0x38;
1765 cmd[2][3] = uid[7];
1766 cmd[2][4] = uid[6];
1767 cmd[2][5] = uid[5];
1768 cmd[2][6] = uid[4];
1769
1770 // Command 4 : 022139u4u3u2u1 (where uX = uid byte X)
1771 cmd[3][0] = 0x02;
1772 cmd[3][1] = 0x21;
1773 cmd[3][2] = 0x39;
1774 cmd[3][3] = uid[3];
1775 cmd[3][4] = uid[2];
1776 cmd[3][5] = uid[1];
1777 cmd[3][6] = uid[0];
1778
c41dd5f9 1779 for (int i = 0; i < 4; i++) {
a66f26da 1780 // Add the CRC
1781 crc = Iso15693Crc(cmd[i], 7);
1782 cmd[i][7] = crc & 0xff;
1783 cmd[i][8] = crc >> 8;
1784
1785 if (DEBUG) {
1786 Dbprintf("SEND:");
1787 Dbhexdump(sizeof(cmd[i]), cmd[i], false);
1788 }
1789
c41dd5f9 1790 recvlen = SendDataTag(cmd[i], sizeof(cmd[i]), true, 1, recvbuf, sizeof(recvbuf), 0, &eof_time);
a66f26da 1791
1792 if (DEBUG) {
1793 Dbprintf("RECV:");
c41dd5f9 1794 if (recvlen > 0) {
1795 Dbhexdump(recvlen, recvbuf, false);
1796 DbdecodeIso15693Answer(recvlen, recvbuf);
1797 }
a66f26da 1798 }
1799
1800 cmd_send(CMD_ACK, recvlen>ISO15693_MAX_RESPONSE_LENGTH?ISO15693_MAX_RESPONSE_LENGTH:recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH);
1801 }
1802
a66f26da 1803 LED_A_OFF();
096dee17 1804}
9455b51c 1805
1806
1807
1808// --------------------------------------------------------------------
1809// -- Misc & deprecated functions
1810// --------------------------------------------------------------------
1811
e6304bca 1812/*
9455b51c 1813
1814// do not use; has a fix UID
1815static void __attribute__((unused)) BuildSysInfoRequest(uint8_t *uid)
1816{
1817 uint8_t cmd[12];
1818
1819 uint16_t crc;
5ea2a248 1820 // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
1821 // followed by the block data
9455b51c 1822 // one sub-carrier, inventory, 1 slot, fast rate
1823 cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
1824 // System Information command code
1825 cmd[1] = 0x2B;
1826 // UID may be optionally specified here
1827 // 64-bit UID
1828 cmd[2] = 0x32;
1829 cmd[3]= 0x4b;
1830 cmd[4] = 0x03;
1831 cmd[5] = 0x01;
1832 cmd[6] = 0x00;
1833 cmd[7] = 0x10;
1834 cmd[8] = 0x05;
1835 cmd[9]= 0xe0; // always e0 (not exactly unique)
1836 //Now the CRC
3d2c9c9b 1837 crc = Iso15693Crc(cmd, 10); // the crc needs to be calculated over 2 bytes
9455b51c 1838 cmd[10] = crc & 0xff;
1839 cmd[11] = crc >> 8;
1840
1841 CodeIso15693AsReader(cmd, sizeof(cmd));
1842}
1843
9455b51c 1844
1845// do not use; has a fix UID
1846static void __attribute__((unused)) BuildReadMultiBlockRequest(uint8_t *uid)
1847{
1848 uint8_t cmd[14];
1849
1850 uint16_t crc;
5ea2a248 1851 // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
1852 // followed by the block data
9455b51c 1853 // one sub-carrier, inventory, 1 slot, fast rate
1854 cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
1855 // READ Multi BLOCK command code
1856 cmd[1] = 0x23;
1857 // UID may be optionally specified here
1858 // 64-bit UID
1859 cmd[2] = 0x32;
1860 cmd[3]= 0x4b;
1861 cmd[4] = 0x03;
1862 cmd[5] = 0x01;
1863 cmd[6] = 0x00;
1864 cmd[7] = 0x10;
1865 cmd[8] = 0x05;
1866 cmd[9]= 0xe0; // always e0 (not exactly unique)
1867 // First Block number to read
1868 cmd[10] = 0x00;
1869 // Number of Blocks to read
1870 cmd[11] = 0x2f; // read quite a few
1871 //Now the CRC
3d2c9c9b 1872 crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
9455b51c 1873 cmd[12] = crc & 0xff;
1874 cmd[13] = crc >> 8;
1875
1876 CodeIso15693AsReader(cmd, sizeof(cmd));
1877}
1878
1879// do not use; has a fix UID
1880static void __attribute__((unused)) BuildArbitraryRequest(uint8_t *uid,uint8_t CmdCode)
1881{
1882 uint8_t cmd[14];
1883
1884 uint16_t crc;
5ea2a248 1885 // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
1886 // followed by the block data
9455b51c 1887 // one sub-carrier, inventory, 1 slot, fast rate
1888 cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
1889 // READ BLOCK command code
1890 cmd[1] = CmdCode;
1891 // UID may be optionally specified here
1892 // 64-bit UID
1893 cmd[2] = 0x32;
1894 cmd[3]= 0x4b;
1895 cmd[4] = 0x03;
1896 cmd[5] = 0x01;
1897 cmd[6] = 0x00;
1898 cmd[7] = 0x10;
1899 cmd[8] = 0x05;
1900 cmd[9]= 0xe0; // always e0 (not exactly unique)
1901 // Parameter
1902 cmd[10] = 0x00;
1903 cmd[11] = 0x0a;
1904
a66f26da 1905// cmd[12] = 0x00;
1906// cmd[13] = 0x00; //Now the CRC
3d2c9c9b 1907 crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
9455b51c 1908 cmd[12] = crc & 0xff;
1909 cmd[13] = crc >> 8;
1910
1911 CodeIso15693AsReader(cmd, sizeof(cmd));
1912}
1913
1914// do not use; has a fix UID
1915static void __attribute__((unused)) BuildArbitraryCustomRequest(uint8_t uid[], uint8_t CmdCode)
1916{
1917 uint8_t cmd[14];
1918
1919 uint16_t crc;
5ea2a248 1920 // If we set the Option_Flag in this request, the VICC will respond with the security status of the block
1921 // followed by the block data
9455b51c 1922 // one sub-carrier, inventory, 1 slot, fast rate
1923 cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit
1924 // READ BLOCK command code
1925 cmd[1] = CmdCode;
1926 // UID may be optionally specified here
1927 // 64-bit UID
1928 cmd[2] = 0x32;
1929 cmd[3]= 0x4b;
1930 cmd[4] = 0x03;
1931 cmd[5] = 0x01;
1932 cmd[6] = 0x00;
1933 cmd[7] = 0x10;
1934 cmd[8] = 0x05;
1935 cmd[9]= 0xe0; // always e0 (not exactly unique)
1936 // Parameter
5ea2a248 1937 cmd[10] = 0x05; // for custom codes this must be manufacturer code
9455b51c 1938 cmd[11] = 0x00;
1939
a66f26da 1940// cmd[12] = 0x00;
1941// cmd[13] = 0x00; //Now the CRC
3d2c9c9b 1942 crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes
9455b51c 1943 cmd[12] = crc & 0xff;
1944 cmd[13] = crc >> 8;
1945
1946 CodeIso15693AsReader(cmd, sizeof(cmd));
1947}
1948
1949
1950
1951
e6304bca 1952*/
9455b51c 1953
1954
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