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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 | ||
70b2fc0a | 67 | static int DEBUG = 0; |
68 | ||
9455b51c | 69 | /////////////////////////////////////////////////////////////////////// |
70 | // ISO 15693 Part 2 - Air Interface | |
3d2c9c9b | 71 | // This section basically contains transmission and receiving of bits |
9455b51c | 72 | /////////////////////////////////////////////////////////////////////// |
73 | ||
8c6cca0b | 74 | // buffers |
3d2c9c9b | 75 | #define ISO15693_DMA_BUFFER_SIZE 2048 // must be a power of 2 |
d9de20fa | 76 | #define ISO15693_MAX_RESPONSE_LENGTH 36 // allows read single block with the maximum block size of 256bits. Read multiple blocks not supported yet |
77 | #define ISO15693_MAX_COMMAND_LENGTH 45 // allows write single block with the maximum block size of 256bits. Write multiple blocks not supported yet | |
8c6cca0b | 78 | |
9455b51c | 79 | // --------------------------- |
8c6cca0b | 80 | // Signal Processing |
9455b51c | 81 | // --------------------------- |
82 | ||
83 | // prepare data using "1 out of 4" code for later transmission | |
8c6cca0b | 84 | // resulting data rate is 26.48 kbit/s (fc/512) |
9455b51c | 85 | // cmd ... data |
86 | // n ... length of data | |
f7e3ed82 | 87 | static void CodeIso15693AsReader(uint8_t *cmd, int n) |
15c4dc5a | 88 | { |
89 | int i, j; | |
90 | ||
91 | ToSendReset(); | |
92 | ||
93 | // Give it a bit of slack at the beginning | |
94 | for(i = 0; i < 24; i++) { | |
95 | ToSendStuffBit(1); | |
96 | } | |
97 | ||
9455b51c | 98 | // SOF for 1of4 |
15c4dc5a | 99 | ToSendStuffBit(0); |
100 | ToSendStuffBit(1); | |
101 | ToSendStuffBit(1); | |
102 | ToSendStuffBit(1); | |
103 | ToSendStuffBit(1); | |
104 | ToSendStuffBit(0); | |
105 | ToSendStuffBit(1); | |
106 | ToSendStuffBit(1); | |
107 | for(i = 0; i < n; i++) { | |
108 | for(j = 0; j < 8; j += 2) { | |
109 | int these = (cmd[i] >> j) & 3; | |
110 | switch(these) { | |
111 | case 0: | |
112 | ToSendStuffBit(1); | |
113 | ToSendStuffBit(0); | |
114 | ToSendStuffBit(1); | |
115 | ToSendStuffBit(1); | |
116 | ToSendStuffBit(1); | |
117 | ToSendStuffBit(1); | |
118 | ToSendStuffBit(1); | |
119 | ToSendStuffBit(1); | |
120 | break; | |
121 | case 1: | |
122 | ToSendStuffBit(1); | |
123 | ToSendStuffBit(1); | |
124 | ToSendStuffBit(1); | |
125 | ToSendStuffBit(0); | |
126 | ToSendStuffBit(1); | |
127 | ToSendStuffBit(1); | |
128 | ToSendStuffBit(1); | |
129 | ToSendStuffBit(1); | |
130 | break; | |
131 | case 2: | |
132 | ToSendStuffBit(1); | |
133 | ToSendStuffBit(1); | |
134 | ToSendStuffBit(1); | |
135 | ToSendStuffBit(1); | |
136 | ToSendStuffBit(1); | |
137 | ToSendStuffBit(0); | |
138 | ToSendStuffBit(1); | |
139 | ToSendStuffBit(1); | |
140 | break; | |
141 | case 3: | |
142 | ToSendStuffBit(1); | |
143 | ToSendStuffBit(1); | |
144 | ToSendStuffBit(1); | |
145 | ToSendStuffBit(1); | |
146 | ToSendStuffBit(1); | |
147 | ToSendStuffBit(1); | |
148 | ToSendStuffBit(1); | |
149 | ToSendStuffBit(0); | |
150 | break; | |
151 | } | |
152 | } | |
153 | } | |
9455b51c | 154 | // EOF |
15c4dc5a | 155 | ToSendStuffBit(1); |
156 | ToSendStuffBit(1); | |
157 | ToSendStuffBit(0); | |
158 | ToSendStuffBit(1); | |
159 | ||
70b2fc0a | 160 | // Fill remainder of last byte with 1 |
161 | for(i = 0; i < 4; i++) { | |
15c4dc5a | 162 | ToSendStuffBit(1); |
163 | } | |
a66f26da | 164 | |
bdf96aae | 165 | ToSendMax++; |
15c4dc5a | 166 | } |
167 | ||
70b2fc0a | 168 | // encode data using "1 out of 256" scheme |
8c6cca0b | 169 | // data rate is 1,66 kbit/s (fc/8192) |
9455b51c | 170 | // is designed for more robust communication over longer distances |
171 | static void CodeIso15693AsReader256(uint8_t *cmd, int n) | |
15c4dc5a | 172 | { |
15c4dc5a | 173 | int i, j; |
174 | ||
9455b51c | 175 | ToSendReset(); |
176 | ||
177 | // Give it a bit of slack at the beginning | |
178 | for(i = 0; i < 24; i++) { | |
179 | ToSendStuffBit(1); | |
180 | } | |
181 | ||
182 | // SOF for 1of256 | |
183 | ToSendStuffBit(0); | |
184 | ToSendStuffBit(1); | |
185 | ToSendStuffBit(1); | |
186 | ToSendStuffBit(1); | |
187 | ToSendStuffBit(1); | |
188 | ToSendStuffBit(1); | |
189 | ToSendStuffBit(1); | |
190 | ToSendStuffBit(0); | |
8c6cca0b | 191 | |
15c4dc5a | 192 | for(i = 0; i < n; i++) { |
9455b51c | 193 | for (j = 0; j<=255; j++) { |
194 | if (cmd[i]==j) { | |
195 | ToSendStuffBit(1); | |
196 | ToSendStuffBit(0); | |
15c4dc5a | 197 | } else { |
9455b51c | 198 | ToSendStuffBit(1); |
199 | ToSendStuffBit(1); | |
8c6cca0b | 200 | } |
201 | } | |
15c4dc5a | 202 | } |
9455b51c | 203 | // EOF |
204 | ToSendStuffBit(1); | |
205 | ToSendStuffBit(1); | |
206 | ToSendStuffBit(0); | |
207 | ToSendStuffBit(1); | |
15c4dc5a | 208 | |
8c6cca0b | 209 | // Fill remainder of last byte with 1 |
210 | for(i = 0; i < 4; i++) { | |
9455b51c | 211 | ToSendStuffBit(1); |
212 | } | |
8c6cca0b | 213 | |
214 | ToSendMax++; | |
215 | } | |
216 | ||
217 | ||
3d2c9c9b | 218 | // static uint8_t encode4Bits(const uint8_t b) { |
219 | // uint8_t c = b & 0xF; | |
220 | // // OTA, the least significant bits first | |
221 | // // The columns are | |
222 | // // 1 - Bit value to send | |
223 | // // 2 - Reversed (big-endian) | |
224 | // // 3 - Manchester Encoded | |
225 | // // 4 - Hex values | |
226 | ||
227 | // switch(c){ | |
228 | // // 1 2 3 4 | |
229 | // case 15: return 0x55; // 1111 -> 1111 -> 01010101 -> 0x55 | |
230 | // case 14: return 0x95; // 1110 -> 0111 -> 10010101 -> 0x95 | |
231 | // case 13: return 0x65; // 1101 -> 1011 -> 01100101 -> 0x65 | |
232 | // case 12: return 0xa5; // 1100 -> 0011 -> 10100101 -> 0xa5 | |
233 | // case 11: return 0x59; // 1011 -> 1101 -> 01011001 -> 0x59 | |
234 | // case 10: return 0x99; // 1010 -> 0101 -> 10011001 -> 0x99 | |
235 | // case 9: return 0x69; // 1001 -> 1001 -> 01101001 -> 0x69 | |
236 | // case 8: return 0xa9; // 1000 -> 0001 -> 10101001 -> 0xa9 | |
237 | // case 7: return 0x56; // 0111 -> 1110 -> 01010110 -> 0x56 | |
238 | // case 6: return 0x96; // 0110 -> 0110 -> 10010110 -> 0x96 | |
239 | // case 5: return 0x66; // 0101 -> 1010 -> 01100110 -> 0x66 | |
240 | // case 4: return 0xa6; // 0100 -> 0010 -> 10100110 -> 0xa6 | |
241 | // case 3: return 0x5a; // 0011 -> 1100 -> 01011010 -> 0x5a | |
242 | // case 2: return 0x9a; // 0010 -> 0100 -> 10011010 -> 0x9a | |
243 | // case 1: return 0x6a; // 0001 -> 1000 -> 01101010 -> 0x6a | |
244 | // default: return 0xaa; // 0000 -> 0000 -> 10101010 -> 0xaa | |
245 | ||
246 | // } | |
247 | // } | |
248 | ||
249 | void CodeIso15693AsTag(uint8_t *cmd, size_t len) { | |
250 | /* | |
251 | * SOF comprises 3 parts; | |
252 | * * An unmodulated time of 56.64 us | |
253 | * * 24 pulses of 423.75 kHz (fc/32) | |
254 | * * A logic 1, which starts with an unmodulated time of 18.88us | |
255 | * followed by 8 pulses of 423.75kHz (fc/32) | |
256 | * | |
257 | * EOF comprises 3 parts: | |
258 | * - A logic 0 (which starts with 8 pulses of fc/32 followed by an unmodulated | |
259 | * time of 18.88us. | |
260 | * - 24 pulses of fc/32 | |
261 | * - An unmodulated time of 56.64 us | |
262 | * | |
263 | * A logic 0 starts with 8 pulses of fc/32 | |
264 | * followed by an unmodulated time of 256/fc (~18,88us). | |
265 | * | |
266 | * A logic 0 starts with unmodulated time of 256/fc (~18,88us) followed by | |
267 | * 8 pulses of fc/32 (also 18.88us) | |
268 | * | |
269 | * A bit here becomes 8 pulses of fc/32. Therefore: | |
270 | * The SOF can be written as 00011101 = 0x1D | |
271 | * The EOF can be written as 10111000 = 0xb8 | |
272 | * A logic 1 is 01 | |
273 | * A logic 0 is 10 | |
274 | * | |
275 | * */ | |
276 | ||
8c6cca0b | 277 | ToSendReset(); |
278 | ||
279 | // SOF | |
3d2c9c9b | 280 | ToSend[++ToSendMax] = 0x1D; // 00011101 |
8c6cca0b | 281 | |
282 | // data | |
3d2c9c9b | 283 | for(int i = 0; i < len; i++) { |
8c6cca0b | 284 | for(int j = 0; j < 8; j++) { |
285 | if ((cmd[i] >> j) & 0x01) { | |
286 | ToSendStuffBit(0); | |
287 | ToSendStuffBit(1); | |
288 | } else { | |
289 | ToSendStuffBit(1); | |
290 | ToSendStuffBit(0); | |
291 | } | |
292 | } | |
293 | } | |
294 | ||
295 | // EOF | |
3d2c9c9b | 296 | ToSend[++ToSendMax] = 0xB8; // 10111000 |
8c6cca0b | 297 | |
298 | ToSendMax++; | |
15c4dc5a | 299 | } |
300 | ||
9455b51c | 301 | |
70b2fc0a | 302 | // Transmit the command (to the tag) that was placed in cmd[]. |
d9de20fa | 303 | static void TransmitTo15693Tag(const uint8_t *cmd, int len, uint32_t start_time) |
15c4dc5a | 304 | { |
5ea2a248 | 305 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SEND_FULL_MOD); |
306 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); | |
15c4dc5a | 307 | |
5ea2a248 | 308 | while (GetCountSspClk() < start_time) ; |
d9de20fa | 309 | |
70b2fc0a | 310 | LED_B_ON(); |
5ea2a248 | 311 | for(int c = 0; c < len; c++) { |
312 | uint8_t data = cmd[c]; | |
313 | for (int i = 0; i < 8; i++) { | |
314 | uint16_t send_word = (data & 0x80) ? 0x0000 : 0xffff; | |
315 | while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ; | |
316 | AT91C_BASE_SSC->SSC_THR = send_word; | |
317 | while (!(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_TXRDY))) ; | |
318 | AT91C_BASE_SSC->SSC_THR = send_word; | |
319 | data <<= 1; | |
320 | } | |
321 | WDT_HIT(); | |
322 | } | |
70b2fc0a | 323 | LED_B_OFF(); |
15c4dc5a | 324 | } |
325 | ||
5ea2a248 | 326 | |
15c4dc5a | 327 | //----------------------------------------------------------------------------- |
8c6cca0b | 328 | // Transmit the tag response (to the reader) that was placed in cmd[]. |
15c4dc5a | 329 | //----------------------------------------------------------------------------- |
3d2c9c9b | 330 | void TransmitTo15693Reader(const uint8_t *cmd, size_t len, uint32_t start_time, bool slow) { |
8c6cca0b | 331 | // don't use the FPGA_HF_SIMULATOR_MODULATE_424K_8BIT minor mode. It would spoil GetCountSspClk() |
70b2fc0a | 332 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_MODULATE_424K); |
15c4dc5a | 333 | |
8c6cca0b | 334 | uint8_t shift_delay = start_time & 0x00000007; |
8c6cca0b | 335 | |
336 | while (GetCountSspClk() < (start_time & 0xfffffff8)) ; | |
d9de20fa | 337 | |
70b2fc0a | 338 | LED_C_ON(); |
8c6cca0b | 339 | uint8_t bits_to_shift = 0x00; |
3d2c9c9b | 340 | uint8_t bits_to_send = 0x00; |
a66f26da | 341 | for(size_t c = 0; c < len; c++) { |
8c6cca0b | 342 | for (int i = 7; i >= 0; i--) { |
3d2c9c9b | 343 | uint8_t cmd_bits = ((cmd[c] >> i) & 0x01) ? 0xff : 0x00; |
8c6cca0b | 344 | for (int j = 0; j < (slow?4:1); ) { |
345 | if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) { | |
a66f26da | 346 | bits_to_send = bits_to_shift << (8 - shift_delay) | cmd_bits >> shift_delay; |
3d2c9c9b | 347 | AT91C_BASE_SSC->SSC_THR = bits_to_send; |
a66f26da | 348 | bits_to_shift = cmd_bits; |
8c6cca0b | 349 | j++; |
350 | } | |
8c6cca0b | 351 | } |
a66f26da | 352 | } |
3d2c9c9b | 353 | WDT_HIT(); |
a66f26da | 354 | } |
3d2c9c9b | 355 | // send the remaining bits, padded with 0: |
356 | bits_to_send = bits_to_shift << (8 - shift_delay); | |
357 | for ( ; ; ) { | |
358 | if (AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXRDY) { | |
359 | AT91C_BASE_SSC->SSC_THR = bits_to_send; | |
360 | break; | |
361 | } | |
362 | } | |
70b2fc0a | 363 | LED_C_OFF(); |
3d2c9c9b | 364 | |
15c4dc5a | 365 | } |
366 | ||
9455b51c | 367 | |
70b2fc0a | 368 | //============================================================================= |
8c6cca0b | 369 | // An ISO 15693 decoder for tag responses (one subcarrier only). |
d9de20fa | 370 | // Uses cross correlation to identify each bit and EOF. |
70b2fc0a | 371 | // This function is called 8 times per bit (every 2 subcarrier cycles). |
8c6cca0b | 372 | // Subcarrier frequency fs is 424kHz, 1/fs = 2,36us, |
70b2fc0a | 373 | // i.e. function is called every 4,72us |
374 | // LED handling: | |
375 | // LED C -> ON once we have received the SOF and are expecting the rest. | |
376 | // LED C -> OFF once we have received EOF or are unsynced | |
377 | // | |
378 | // Returns: true if we received a EOF | |
379 | // false if we are still waiting for some more | |
380 | //============================================================================= | |
381 | ||
c0e7527d | 382 | #define NOISE_THRESHOLD 160 // don't try to correlate noise |
70b2fc0a | 383 | |
8c6cca0b | 384 | typedef struct DecodeTag { |
70b2fc0a | 385 | enum { |
d9de20fa | 386 | STATE_TAG_SOF_LOW, |
387 | STATE_TAG_SOF_HIGH, | |
388 | STATE_TAG_SOF_HIGH_END, | |
8c6cca0b | 389 | STATE_TAG_RECEIVING_DATA, |
d9de20fa | 390 | STATE_TAG_EOF |
70b2fc0a | 391 | } state; |
392 | int bitCount; | |
393 | int posCount; | |
394 | enum { | |
395 | LOGIC0, | |
396 | LOGIC1, | |
397 | SOF_PART1, | |
398 | SOF_PART2 | |
399 | } lastBit; | |
400 | uint16_t shiftReg; | |
d9de20fa | 401 | uint16_t max_len; |
70b2fc0a | 402 | uint8_t *output; |
403 | int len; | |
404 | int sum1, sum2; | |
8c6cca0b | 405 | } DecodeTag_t; |
70b2fc0a | 406 | |
d9de20fa | 407 | |
408 | static int inline __attribute__((always_inline)) Handle15693SamplesFromTag(uint16_t amplitude, DecodeTag_t *DecodeTag) | |
15c4dc5a | 409 | { |
8c6cca0b | 410 | switch(DecodeTag->state) { |
a66f26da | 411 | case STATE_TAG_SOF_LOW: |
d9de20fa | 412 | // waiting for 12 times low (11 times low is accepted as well) |
413 | if (amplitude < NOISE_THRESHOLD) { | |
8c6cca0b | 414 | DecodeTag->posCount++; |
70b2fc0a | 415 | } else { |
d9de20fa | 416 | if (DecodeTag->posCount > 10) { |
417 | DecodeTag->posCount = 1; | |
418 | DecodeTag->sum1 = 0; | |
419 | DecodeTag->state = STATE_TAG_SOF_HIGH; | |
420 | } else { | |
421 | DecodeTag->posCount = 0; | |
422 | } | |
15c4dc5a | 423 | } |
d9de20fa | 424 | break; |
a66f26da | 425 | |
d9de20fa | 426 | case STATE_TAG_SOF_HIGH: |
427 | // waiting for 10 times high. Take average over the last 8 | |
428 | if (amplitude > NOISE_THRESHOLD) { | |
429 | DecodeTag->posCount++; | |
430 | if (DecodeTag->posCount > 2) { | |
431 | DecodeTag->sum1 += amplitude; // keep track of average high value | |
432 | } | |
433 | if (DecodeTag->posCount == 10) { | |
434 | DecodeTag->sum1 >>= 4; // calculate half of average high value (8 samples) | |
435 | DecodeTag->state = STATE_TAG_SOF_HIGH_END; | |
436 | } | |
437 | } else { // high phase was too short | |
438 | DecodeTag->posCount = 1; | |
439 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
70b2fc0a | 440 | } |
70b2fc0a | 441 | break; |
442 | ||
d9de20fa | 443 | case STATE_TAG_SOF_HIGH_END: |
444 | // waiting for a falling edge | |
445 | if (amplitude < DecodeTag->sum1) { // signal drops below 50% average high: a falling edge | |
446 | DecodeTag->lastBit = SOF_PART1; // detected 1st part of SOF (12 samples low and 12 samples high) | |
447 | DecodeTag->shiftReg = 0; | |
448 | DecodeTag->bitCount = 0; | |
449 | DecodeTag->len = 0; | |
450 | DecodeTag->sum1 = amplitude; | |
8c6cca0b | 451 | DecodeTag->sum2 = 0; |
452 | DecodeTag->posCount = 2; | |
453 | DecodeTag->state = STATE_TAG_RECEIVING_DATA; | |
70b2fc0a | 454 | LED_C_ON(); |
d9de20fa | 455 | } else { |
456 | DecodeTag->posCount++; | |
457 | if (DecodeTag->posCount > 13) { // high phase too long | |
458 | DecodeTag->posCount = 0; | |
459 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
460 | LED_C_OFF(); | |
461 | } | |
70b2fc0a | 462 | } |
70b2fc0a | 463 | break; |
15c4dc5a | 464 | |
8c6cca0b | 465 | case STATE_TAG_RECEIVING_DATA: |
466 | if (DecodeTag->posCount == 1) { | |
467 | DecodeTag->sum1 = 0; | |
468 | DecodeTag->sum2 = 0; | |
70b2fc0a | 469 | } |
8c6cca0b | 470 | if (DecodeTag->posCount <= 4) { |
d9de20fa | 471 | DecodeTag->sum1 += amplitude; |
70b2fc0a | 472 | } else { |
d9de20fa | 473 | DecodeTag->sum2 += amplitude; |
70b2fc0a | 474 | } |
8c6cca0b | 475 | if (DecodeTag->posCount == 8) { |
d9de20fa | 476 | int32_t corr_1 = DecodeTag->sum2 - DecodeTag->sum1; |
477 | int32_t corr_0 = -corr_1; | |
478 | int32_t corr_EOF = (DecodeTag->sum1 + DecodeTag->sum2) / 2; | |
70b2fc0a | 479 | if (corr_EOF > corr_0 && corr_EOF > corr_1) { |
d9de20fa | 480 | if (DecodeTag->lastBit == LOGIC0) { // this was already part of EOF |
481 | DecodeTag->state = STATE_TAG_EOF; | |
482 | } else { | |
483 | DecodeTag->posCount = 0; | |
484 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
485 | LED_C_OFF(); | |
486 | } | |
70b2fc0a | 487 | } else if (corr_1 > corr_0) { |
488 | // logic 1 | |
8c6cca0b | 489 | if (DecodeTag->lastBit == SOF_PART1) { // still part of SOF |
d9de20fa | 490 | DecodeTag->lastBit = SOF_PART2; // SOF completed |
70b2fc0a | 491 | } else { |
8c6cca0b | 492 | DecodeTag->lastBit = LOGIC1; |
493 | DecodeTag->shiftReg >>= 1; | |
494 | DecodeTag->shiftReg |= 0x80; | |
495 | DecodeTag->bitCount++; | |
496 | if (DecodeTag->bitCount == 8) { | |
497 | DecodeTag->output[DecodeTag->len] = DecodeTag->shiftReg; | |
498 | DecodeTag->len++; | |
d9de20fa | 499 | if (DecodeTag->len > DecodeTag->max_len) { |
500 | // buffer overflow, give up | |
501 | DecodeTag->posCount = 0; | |
502 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
503 | LED_C_OFF(); | |
504 | } | |
8c6cca0b | 505 | DecodeTag->bitCount = 0; |
506 | DecodeTag->shiftReg = 0; | |
70b2fc0a | 507 | } |
508 | } | |
509 | } else { | |
510 | // logic 0 | |
8c6cca0b | 511 | if (DecodeTag->lastBit == SOF_PART1) { // incomplete SOF |
d9de20fa | 512 | DecodeTag->posCount = 0; |
513 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
70b2fc0a | 514 | LED_C_OFF(); |
515 | } else { | |
8c6cca0b | 516 | DecodeTag->lastBit = LOGIC0; |
517 | DecodeTag->shiftReg >>= 1; | |
518 | DecodeTag->bitCount++; | |
519 | if (DecodeTag->bitCount == 8) { | |
520 | DecodeTag->output[DecodeTag->len] = DecodeTag->shiftReg; | |
521 | DecodeTag->len++; | |
d9de20fa | 522 | if (DecodeTag->len > DecodeTag->max_len) { |
523 | // buffer overflow, give up | |
524 | DecodeTag->posCount = 0; | |
525 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
526 | LED_C_OFF(); | |
527 | } | |
8c6cca0b | 528 | DecodeTag->bitCount = 0; |
529 | DecodeTag->shiftReg = 0; | |
70b2fc0a | 530 | } |
531 | } | |
532 | } | |
8c6cca0b | 533 | DecodeTag->posCount = 0; |
70b2fc0a | 534 | } |
8c6cca0b | 535 | DecodeTag->posCount++; |
70b2fc0a | 536 | break; |
8c6cca0b | 537 | |
d9de20fa | 538 | case STATE_TAG_EOF: |
539 | if (DecodeTag->posCount == 1) { | |
540 | DecodeTag->sum1 = 0; | |
541 | DecodeTag->sum2 = 0; | |
542 | } | |
543 | if (DecodeTag->posCount <= 4) { | |
544 | DecodeTag->sum1 += amplitude; | |
70b2fc0a | 545 | } else { |
d9de20fa | 546 | DecodeTag->sum2 += amplitude; |
70b2fc0a | 547 | } |
d9de20fa | 548 | if (DecodeTag->posCount == 8) { |
549 | int32_t corr_1 = DecodeTag->sum2 - DecodeTag->sum1; | |
550 | int32_t corr_0 = -corr_1; | |
551 | int32_t corr_EOF = (DecodeTag->sum1 + DecodeTag->sum2) / 2; | |
552 | if (corr_EOF > corr_0 || corr_1 > corr_0) { | |
553 | DecodeTag->posCount = 0; | |
554 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
555 | LED_C_OFF(); | |
556 | } else { | |
557 | LED_C_OFF(); | |
558 | return true; | |
559 | } | |
560 | } | |
561 | DecodeTag->posCount++; | |
70b2fc0a | 562 | break; |
563 | ||
15c4dc5a | 564 | } |
15c4dc5a | 565 | |
70b2fc0a | 566 | return false; |
567 | } | |
15c4dc5a | 568 | |
15c4dc5a | 569 | |
d9de20fa | 570 | static void DecodeTagInit(DecodeTag_t *DecodeTag, uint8_t *data, uint16_t max_len) |
70b2fc0a | 571 | { |
d9de20fa | 572 | DecodeTag->posCount = 0; |
573 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
8c6cca0b | 574 | DecodeTag->output = data; |
d9de20fa | 575 | DecodeTag->max_len = max_len; |
576 | } | |
577 | ||
578 | ||
579 | static void DecodeTagReset(DecodeTag_t *DecodeTag) | |
580 | { | |
581 | DecodeTag->posCount = 0; | |
582 | DecodeTag->state = STATE_TAG_SOF_LOW; | |
70b2fc0a | 583 | } |
584 | ||
d9de20fa | 585 | |
70b2fc0a | 586 | /* |
8c6cca0b | 587 | * Receive and decode the tag response, also log to tracebuffer |
70b2fc0a | 588 | */ |
d9de20fa | 589 | static int GetIso15693AnswerFromTag(uint8_t* response, uint16_t max_len, int timeout) |
70b2fc0a | 590 | { |
d9de20fa | 591 | int samples = 0; |
70b2fc0a | 592 | bool gotFrame = false; |
70b2fc0a | 593 | |
d9de20fa | 594 | uint16_t *dmaBuf = (uint16_t*)BigBuf_malloc(ISO15693_DMA_BUFFER_SIZE*sizeof(uint16_t)); |
a66f26da | 595 | |
8c6cca0b | 596 | // the Decoder data structure |
d9de20fa | 597 | DecodeTag_t DecodeTag = { 0 }; |
598 | DecodeTagInit(&DecodeTag, response, max_len); | |
70b2fc0a | 599 | |
600 | // wait for last transfer to complete | |
601 | while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)); | |
602 | ||
603 | // And put the FPGA in the appropriate mode | |
5ea2a248 | 604 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_424_KHZ | FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE); |
70b2fc0a | 605 | |
606 | // Setup and start DMA. | |
5ea2a248 | 607 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); |
70b2fc0a | 608 | FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE); |
70b2fc0a | 609 | uint16_t *upTo = dmaBuf; |
70b2fc0a | 610 | |
611 | for(;;) { | |
d9de20fa | 612 | uint16_t behindBy = ((uint16_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1); |
70b2fc0a | 613 | |
d9de20fa | 614 | if (behindBy == 0) continue; |
8c6cca0b | 615 | |
d9de20fa | 616 | uint16_t tagdata = *upTo++; |
70b2fc0a | 617 | |
70b2fc0a | 618 | if(upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content. |
619 | upTo = dmaBuf; // start reading the circular buffer from the beginning | |
d9de20fa | 620 | if(behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) { |
621 | Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy); | |
622 | break; | |
623 | } | |
15c4dc5a | 624 | } |
70b2fc0a | 625 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated. |
626 | AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and | |
627 | AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers | |
15c4dc5a | 628 | } |
d9de20fa | 629 | |
70b2fc0a | 630 | samples++; |
15c4dc5a | 631 | |
d9de20fa | 632 | if (Handle15693SamplesFromTag(tagdata, &DecodeTag)) { |
70b2fc0a | 633 | gotFrame = true; |
634 | break; | |
635 | } | |
15c4dc5a | 636 | |
d9de20fa | 637 | if (samples > timeout && DecodeTag.state < STATE_TAG_RECEIVING_DATA) { |
8c6cca0b | 638 | DecodeTag.len = 0; |
70b2fc0a | 639 | break; |
640 | } | |
8c6cca0b | 641 | |
70b2fc0a | 642 | } |
643 | ||
644 | FpgaDisableSscDma(); | |
d9de20fa | 645 | BigBuf_free(); |
a66f26da | 646 | |
d9de20fa | 647 | if (DEBUG) Dbprintf("samples = %d, gotFrame = %d, Decoder: state = %d, len = %d, bitCount = %d, posCount = %d", |
a66f26da | 648 | samples, gotFrame, DecodeTag.state, DecodeTag.len, DecodeTag.bitCount, DecodeTag.posCount); |
70b2fc0a | 649 | |
d9de20fa | 650 | if (DecodeTag.len > 0) { |
8c6cca0b | 651 | LogTrace(DecodeTag.output, DecodeTag.len, 0, 0, NULL, false); |
70b2fc0a | 652 | } |
653 | ||
8c6cca0b | 654 | return DecodeTag.len; |
15c4dc5a | 655 | } |
656 | ||
9455b51c | 657 | |
8c6cca0b | 658 | //============================================================================= |
659 | // An ISO15693 decoder for reader commands. | |
660 | // | |
661 | // This function is called 4 times per bit (every 2 subcarrier cycles). | |
662 | // Subcarrier frequency fs is 848kHz, 1/fs = 1,18us, i.e. function is called every 2,36us | |
663 | // LED handling: | |
664 | // LED B -> ON once we have received the SOF and are expecting the rest. | |
665 | // LED B -> OFF once we have received EOF or are in error state or unsynced | |
666 | // | |
667 | // Returns: true if we received a EOF | |
668 | // false if we are still waiting for some more | |
669 | //============================================================================= | |
670 | ||
671 | typedef struct DecodeReader { | |
672 | enum { | |
673 | STATE_READER_UNSYNCD, | |
5b12974a | 674 | STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF, |
8c6cca0b | 675 | STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF, |
676 | STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF, | |
677 | STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF, | |
678 | STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4, | |
679 | STATE_READER_RECEIVE_DATA_1_OUT_OF_4, | |
680 | STATE_READER_RECEIVE_DATA_1_OUT_OF_256 | |
681 | } state; | |
682 | enum { | |
683 | CODING_1_OUT_OF_4, | |
684 | CODING_1_OUT_OF_256 | |
685 | } Coding; | |
686 | uint8_t shiftReg; | |
687 | uint8_t bitCount; | |
688 | int byteCount; | |
689 | int byteCountMax; | |
690 | int posCount; | |
a66f26da | 691 | int sum1, sum2; |
8c6cca0b | 692 | uint8_t *output; |
693 | } DecodeReader_t; | |
694 | ||
695 | ||
d9de20fa | 696 | static void DecodeReaderInit(DecodeReader_t* DecodeReader, uint8_t *data, uint16_t max_len) |
697 | { | |
698 | DecodeReader->output = data; | |
699 | DecodeReader->byteCountMax = max_len; | |
700 | DecodeReader->state = STATE_READER_UNSYNCD; | |
701 | DecodeReader->byteCount = 0; | |
702 | DecodeReader->bitCount = 0; | |
703 | DecodeReader->posCount = 1; | |
704 | DecodeReader->shiftReg = 0; | |
705 | } | |
706 | ||
707 | ||
708 | static void DecodeReaderReset(DecodeReader_t* DecodeReader) | |
709 | { | |
710 | DecodeReader->state = STATE_READER_UNSYNCD; | |
711 | } | |
712 | ||
713 | ||
714 | static int inline __attribute__((always_inline)) Handle15693SampleFromReader(uint8_t bit, DecodeReader_t *restrict DecodeReader) | |
15c4dc5a | 715 | { |
3d2c9c9b | 716 | switch (DecodeReader->state) { |
8c6cca0b | 717 | case STATE_READER_UNSYNCD: |
5b12974a | 718 | // wait for unmodulated carrier |
719 | if (bit) { | |
720 | DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF; | |
721 | } | |
722 | break; | |
723 | ||
724 | case STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF: | |
3d2c9c9b | 725 | if (!bit) { |
8c6cca0b | 726 | // we went low, so this could be the beginning of a SOF |
8c6cca0b | 727 | DecodeReader->posCount = 1; |
d9de20fa | 728 | DecodeReader->state = STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF; |
8c6cca0b | 729 | } |
730 | break; | |
15c4dc5a | 731 | |
8c6cca0b | 732 | case STATE_READER_AWAIT_1ST_RISING_EDGE_OF_SOF: |
733 | DecodeReader->posCount++; | |
3d2c9c9b | 734 | if (bit) { // detected rising edge |
735 | if (DecodeReader->posCount < 4) { // rising edge too early (nominally expected at 5) | |
5b12974a | 736 | DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF; |
8c6cca0b | 737 | } else { // SOF |
738 | DecodeReader->state = STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF; | |
739 | } | |
740 | } else { | |
3d2c9c9b | 741 | if (DecodeReader->posCount > 5) { // stayed low for too long |
d9de20fa | 742 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 743 | } else { |
744 | // do nothing, keep waiting | |
745 | } | |
746 | } | |
747 | break; | |
748 | ||
749 | case STATE_READER_AWAIT_2ND_FALLING_EDGE_OF_SOF: | |
750 | DecodeReader->posCount++; | |
3d2c9c9b | 751 | if (!bit) { // detected a falling edge |
8c6cca0b | 752 | if (DecodeReader->posCount < 20) { // falling edge too early (nominally expected at 21 earliest) |
d9de20fa | 753 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 754 | } else if (DecodeReader->posCount < 23) { // SOF for 1 out of 4 coding |
755 | DecodeReader->Coding = CODING_1_OUT_OF_4; | |
756 | DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF; | |
757 | } else if (DecodeReader->posCount < 28) { // falling edge too early (nominally expected at 29 latest) | |
d9de20fa | 758 | DecodeReaderReset(DecodeReader); |
5b12974a | 759 | } else { // SOF for 1 out of 256 coding |
8c6cca0b | 760 | DecodeReader->Coding = CODING_1_OUT_OF_256; |
761 | DecodeReader->state = STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF; | |
762 | } | |
763 | } else { | |
3d2c9c9b | 764 | if (DecodeReader->posCount > 29) { // stayed high for too long |
5b12974a | 765 | DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF; |
8c6cca0b | 766 | } else { |
767 | // do nothing, keep waiting | |
768 | } | |
769 | } | |
770 | break; | |
771 | ||
772 | case STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF: | |
773 | DecodeReader->posCount++; | |
774 | if (bit) { // detected rising edge | |
775 | if (DecodeReader->Coding == CODING_1_OUT_OF_256) { | |
776 | if (DecodeReader->posCount < 32) { // rising edge too early (nominally expected at 33) | |
5b12974a | 777 | DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF; |
8c6cca0b | 778 | } else { |
779 | DecodeReader->posCount = 1; | |
780 | DecodeReader->bitCount = 0; | |
781 | DecodeReader->byteCount = 0; | |
782 | DecodeReader->sum1 = 1; | |
783 | DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_256; | |
784 | LED_B_ON(); | |
785 | } | |
786 | } else { // CODING_1_OUT_OF_4 | |
787 | if (DecodeReader->posCount < 24) { // rising edge too early (nominally expected at 25) | |
5b12974a | 788 | DecodeReader->state = STATE_READER_AWAIT_1ST_FALLING_EDGE_OF_SOF; |
8c6cca0b | 789 | } else { |
5b12974a | 790 | DecodeReader->posCount = 1; |
8c6cca0b | 791 | DecodeReader->state = STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4; |
792 | } | |
793 | } | |
794 | } else { | |
795 | if (DecodeReader->Coding == CODING_1_OUT_OF_256) { | |
796 | if (DecodeReader->posCount > 34) { // signal stayed low for too long | |
5b12974a | 797 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 798 | } else { |
799 | // do nothing, keep waiting | |
800 | } | |
801 | } else { // CODING_1_OUT_OF_4 | |
802 | if (DecodeReader->posCount > 26) { // signal stayed low for too long | |
5b12974a | 803 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 804 | } else { |
805 | // do nothing, keep waiting | |
806 | } | |
807 | } | |
808 | } | |
809 | break; | |
810 | ||
811 | case STATE_READER_AWAIT_END_OF_SOF_1_OUT_OF_4: | |
812 | DecodeReader->posCount++; | |
813 | if (bit) { | |
5b12974a | 814 | if (DecodeReader->posCount == 9) { |
8c6cca0b | 815 | DecodeReader->posCount = 1; |
816 | DecodeReader->bitCount = 0; | |
817 | DecodeReader->byteCount = 0; | |
818 | DecodeReader->sum1 = 1; | |
819 | DecodeReader->state = STATE_READER_RECEIVE_DATA_1_OUT_OF_4; | |
820 | LED_B_ON(); | |
821 | } else { | |
822 | // do nothing, keep waiting | |
823 | } | |
824 | } else { // unexpected falling edge | |
d9de20fa | 825 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 826 | } |
827 | break; | |
828 | ||
829 | case STATE_READER_RECEIVE_DATA_1_OUT_OF_4: | |
e49d31c0 | 830 | bit = !!bit; |
8c6cca0b | 831 | DecodeReader->posCount++; |
832 | if (DecodeReader->posCount == 1) { | |
833 | DecodeReader->sum1 = bit; | |
834 | } else if (DecodeReader->posCount <= 4) { | |
835 | DecodeReader->sum1 += bit; | |
836 | } else if (DecodeReader->posCount == 5) { | |
837 | DecodeReader->sum2 = bit; | |
838 | } else { | |
839 | DecodeReader->sum2 += bit; | |
840 | } | |
841 | if (DecodeReader->posCount == 8) { | |
842 | DecodeReader->posCount = 0; | |
e49d31c0 | 843 | if (DecodeReader->sum1 <= 1 && DecodeReader->sum2 >= 3) { // EOF |
8c6cca0b | 844 | LED_B_OFF(); // Finished receiving |
d9de20fa | 845 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 846 | if (DecodeReader->byteCount != 0) { |
847 | return true; | |
848 | } | |
849 | } | |
e49d31c0 | 850 | if (DecodeReader->sum1 >= 3 && DecodeReader->sum2 <= 1) { // detected a 2bit position |
8c6cca0b | 851 | DecodeReader->shiftReg >>= 2; |
852 | DecodeReader->shiftReg |= (DecodeReader->bitCount << 6); | |
853 | } | |
854 | if (DecodeReader->bitCount == 15) { // we have a full byte | |
855 | DecodeReader->output[DecodeReader->byteCount++] = DecodeReader->shiftReg; | |
856 | if (DecodeReader->byteCount > DecodeReader->byteCountMax) { | |
857 | // buffer overflow, give up | |
858 | LED_B_OFF(); | |
d9de20fa | 859 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 860 | } |
861 | DecodeReader->bitCount = 0; | |
d9de20fa | 862 | DecodeReader->shiftReg = 0; |
8c6cca0b | 863 | } else { |
864 | DecodeReader->bitCount++; | |
865 | } | |
866 | } | |
867 | break; | |
868 | ||
869 | case STATE_READER_RECEIVE_DATA_1_OUT_OF_256: | |
e49d31c0 | 870 | bit = !!bit; |
8c6cca0b | 871 | DecodeReader->posCount++; |
872 | if (DecodeReader->posCount == 1) { | |
873 | DecodeReader->sum1 = bit; | |
874 | } else if (DecodeReader->posCount <= 4) { | |
875 | DecodeReader->sum1 += bit; | |
876 | } else if (DecodeReader->posCount == 5) { | |
877 | DecodeReader->sum2 = bit; | |
878 | } else { | |
879 | DecodeReader->sum2 += bit; | |
880 | } | |
881 | if (DecodeReader->posCount == 8) { | |
882 | DecodeReader->posCount = 0; | |
e49d31c0 | 883 | if (DecodeReader->sum1 <= 1 && DecodeReader->sum2 >= 3) { // EOF |
8c6cca0b | 884 | LED_B_OFF(); // Finished receiving |
d9de20fa | 885 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 886 | if (DecodeReader->byteCount != 0) { |
887 | return true; | |
888 | } | |
889 | } | |
e49d31c0 | 890 | if (DecodeReader->sum1 >= 3 && DecodeReader->sum2 <= 1) { // detected the bit position |
8c6cca0b | 891 | DecodeReader->shiftReg = DecodeReader->bitCount; |
892 | } | |
893 | if (DecodeReader->bitCount == 255) { // we have a full byte | |
894 | DecodeReader->output[DecodeReader->byteCount++] = DecodeReader->shiftReg; | |
895 | if (DecodeReader->byteCount > DecodeReader->byteCountMax) { | |
896 | // buffer overflow, give up | |
897 | LED_B_OFF(); | |
d9de20fa | 898 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 899 | } |
900 | } | |
901 | DecodeReader->bitCount++; | |
902 | } | |
903 | break; | |
904 | ||
905 | default: | |
906 | LED_B_OFF(); | |
d9de20fa | 907 | DecodeReaderReset(DecodeReader); |
8c6cca0b | 908 | break; |
15c4dc5a | 909 | } |
8c6cca0b | 910 | |
911 | return false; | |
912 | } | |
913 | ||
914 | ||
8c6cca0b | 915 | //----------------------------------------------------------------------------- |
916 | // Receive a command (from the reader to us, where we are the simulated tag), | |
917 | // and store it in the given buffer, up to the given maximum length. Keeps | |
918 | // spinning, waiting for a well-framed command, until either we get one | |
3d2c9c9b | 919 | // (returns len) or someone presses the pushbutton on the board (returns -1). |
8c6cca0b | 920 | // |
921 | // Assume that we're called with the SSC (to the FPGA) and ADC path set | |
922 | // correctly. | |
923 | //----------------------------------------------------------------------------- | |
924 | ||
3d2c9c9b | 925 | int GetIso15693CommandFromReader(uint8_t *received, size_t max_len, uint32_t *eof_time) { |
d9de20fa | 926 | int samples = 0; |
8c6cca0b | 927 | bool gotFrame = false; |
928 | uint8_t b; | |
929 | ||
3d2c9c9b | 930 | uint8_t dmaBuf[ISO15693_DMA_BUFFER_SIZE]; |
8c6cca0b | 931 | |
932 | // the decoder data structure | |
6eeb5f1c | 933 | DecodeReader_t DecodeReader = {0}; |
d9de20fa | 934 | DecodeReaderInit(&DecodeReader, received, max_len); |
8c6cca0b | 935 | |
936 | // wait for last transfer to complete | |
937 | while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)); | |
938 | ||
70b2fc0a | 939 | LED_D_OFF(); |
8c6cca0b | 940 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); |
15c4dc5a | 941 | |
8c6cca0b | 942 | // clear receive register and wait for next transfer |
943 | uint32_t temp = AT91C_BASE_SSC->SSC_RHR; | |
944 | (void) temp; | |
945 | while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_RXRDY)) ; | |
15c4dc5a | 946 | |
3d2c9c9b | 947 | uint32_t dma_start_time = GetCountSspClk() & 0xfffffff8; |
15c4dc5a | 948 | |
8c6cca0b | 949 | // Setup and start DMA. |
950 | FpgaSetupSscDma(dmaBuf, ISO15693_DMA_BUFFER_SIZE); | |
951 | uint8_t *upTo = dmaBuf; | |
15c4dc5a | 952 | |
3d2c9c9b | 953 | for (;;) { |
d9de20fa | 954 | uint16_t behindBy = ((uint8_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1); |
70b2fc0a | 955 | |
d9de20fa | 956 | if (behindBy == 0) continue; |
15c4dc5a | 957 | |
8c6cca0b | 958 | b = *upTo++; |
3d2c9c9b | 959 | if (upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content. |
8c6cca0b | 960 | upTo = dmaBuf; // start reading the circular buffer from the beginning |
3d2c9c9b | 961 | if (behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) { |
d9de20fa | 962 | Dbprintf("About to blow circular buffer - aborted! behindBy=%d", behindBy); |
963 | break; | |
964 | } | |
8c6cca0b | 965 | } |
966 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated. | |
967 | AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and | |
968 | AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers | |
969 | } | |
15c4dc5a | 970 | |
8c6cca0b | 971 | for (int i = 7; i >= 0; i--) { |
972 | if (Handle15693SampleFromReader((b >> i) & 0x01, &DecodeReader)) { | |
3d2c9c9b | 973 | *eof_time = dma_start_time + samples - DELAY_READER_TO_ARM_SIM; // end of EOF |
8c6cca0b | 974 | gotFrame = true; |
9455b51c | 975 | break; |
976 | } | |
8c6cca0b | 977 | samples++; |
15c4dc5a | 978 | } |
8c6cca0b | 979 | |
980 | if (gotFrame) { | |
981 | break; | |
15c4dc5a | 982 | } |
8c6cca0b | 983 | |
984 | if (BUTTON_PRESS()) { | |
3d2c9c9b | 985 | DecodeReader.byteCount = -1; |
8c6cca0b | 986 | break; |
15c4dc5a | 987 | } |
15c4dc5a | 988 | |
8c6cca0b | 989 | WDT_HIT(); |
990 | } | |
991 | ||
8c6cca0b | 992 | FpgaDisableSscDma(); |
a66f26da | 993 | |
d9de20fa | 994 | if (DEBUG) Dbprintf("samples = %d, gotFrame = %d, Decoder: state = %d, len = %d, bitCount = %d, posCount = %d", |
a66f26da | 995 | samples, gotFrame, DecodeReader.state, DecodeReader.byteCount, DecodeReader.bitCount, DecodeReader.posCount); |
8c6cca0b | 996 | |
d9de20fa | 997 | if (DecodeReader.byteCount > 0) { |
a66f26da | 998 | uint32_t sof_time = *eof_time |
3d2c9c9b | 999 | - DecodeReader.byteCount * (DecodeReader.Coding==CODING_1_OUT_OF_4?128:2048) // time for byte transfers |
1000 | - 32 // time for SOF transfer | |
1001 | - 16; // time for EOF transfer | |
1002 | LogTrace(DecodeReader.output, DecodeReader.byteCount, sof_time, *eof_time, NULL, true); | |
8c6cca0b | 1003 | } |
1004 | ||
1005 | return DecodeReader.byteCount; | |
15c4dc5a | 1006 | } |
1007 | ||
9455b51c | 1008 | |
d9de20fa | 1009 | // Encode (into the ToSend buffers) an identify request, which is the first |
1010 | // thing that you must send to a tag to get a response. | |
1011 | static void BuildIdentifyRequest(void) | |
1012 | { | |
1013 | uint8_t cmd[5]; | |
1014 | ||
1015 | uint16_t crc; | |
1016 | // one sub-carrier, inventory, 1 slot, fast rate | |
1017 | // AFI is at bit 5 (1<<4) when doing an INVENTORY | |
1018 | cmd[0] = (1 << 2) | (1 << 5) | (1 << 1); | |
1019 | // inventory command code | |
1020 | cmd[1] = 0x01; | |
1021 | // no mask | |
1022 | cmd[2] = 0x00; | |
1023 | //Now the CRC | |
3d2c9c9b | 1024 | crc = Iso15693Crc(cmd, 3); |
d9de20fa | 1025 | cmd[3] = crc & 0xff; |
1026 | cmd[4] = crc >> 8; | |
1027 | ||
1028 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1029 | } | |
1030 | ||
1031 | ||
15c4dc5a | 1032 | //----------------------------------------------------------------------------- |
1033 | // Start to read an ISO 15693 tag. We send an identify request, then wait | |
1034 | // for the response. The response is not demodulated, just left in the buffer | |
1035 | // so that it can be downloaded to a PC and processed there. | |
1036 | //----------------------------------------------------------------------------- | |
1037 | void AcquireRawAdcSamplesIso15693(void) | |
1038 | { | |
70b2fc0a | 1039 | LEDsoff(); |
1040 | LED_A_ON(); | |
8c6cca0b | 1041 | |
117d9ec2 | 1042 | uint8_t *dest = BigBuf_get_addr(); |
15c4dc5a | 1043 | |
7cc204bf | 1044 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
5ea2a248 | 1045 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER); |
1046 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); | |
15c4dc5a | 1047 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); |
1048 | ||
5ea2a248 | 1049 | BuildIdentifyRequest(); |
1050 | ||
15c4dc5a | 1051 | // Give the tags time to energize |
70b2fc0a | 1052 | LED_D_ON(); |
15c4dc5a | 1053 | SpinDelay(100); |
1054 | ||
1055 | // Now send the command | |
5ea2a248 | 1056 | TransmitTo15693Tag(ToSend, ToSendMax, 0); |
70b2fc0a | 1057 | |
1058 | // wait for last transfer to complete | |
5ea2a248 | 1059 | while (!(AT91C_BASE_SSC->SSC_SR & AT91C_SSC_TXEMPTY)) ; |
15c4dc5a | 1060 | |
5ea2a248 | 1061 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_SUBCARRIER_424_KHZ | FPGA_HF_READER_MODE_RECEIVE_AMPLITUDE); |
15c4dc5a | 1062 | |
70b2fc0a | 1063 | for(int c = 0; c < 4000; ) { |
15c4dc5a | 1064 | if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) { |
d9de20fa | 1065 | uint16_t r = AT91C_BASE_SSC->SSC_RHR; |
1066 | dest[c++] = r >> 5; | |
9455b51c | 1067 | } |
1068 | } | |
70b2fc0a | 1069 | |
1070 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); | |
1071 | LEDsoff(); | |
9455b51c | 1072 | } |
1073 | ||
1074 | ||
d9de20fa | 1075 | void SnoopIso15693(void) |
9455b51c | 1076 | { |
1523527f | 1077 | LED_A_ON(); |
d9de20fa | 1078 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
1079 | BigBuf_free(); | |
8c6cca0b | 1080 | |
d9de20fa | 1081 | clear_trace(); |
1082 | set_tracing(true); | |
3fe4ff4f | 1083 | |
d9de20fa | 1084 | // The DMA buffer, used to stream samples from the FPGA |
1085 | uint16_t* dmaBuf = (uint16_t*)BigBuf_malloc(ISO15693_DMA_BUFFER_SIZE*sizeof(uint16_t)); | |
1086 | uint16_t *upTo; | |
1087 | ||
1088 | // Count of samples received so far, so that we can include timing | |
1089 | // information in the trace buffer. | |
1090 | int samples = 0; | |
1091 | ||
1092 | DecodeTag_t DecodeTag = {0}; | |
1093 | uint8_t response[ISO15693_MAX_RESPONSE_LENGTH]; | |
1094 | DecodeTagInit(&DecodeTag, response, sizeof(response)); | |
9455b51c | 1095 | |
d9de20fa | 1096 | DecodeReader_t DecodeReader = {0};; |
1097 | uint8_t cmd[ISO15693_MAX_COMMAND_LENGTH]; | |
1098 | DecodeReaderInit(&DecodeReader, cmd, sizeof(cmd)); | |
1099 | ||
1100 | // Print some debug information about the buffer sizes | |
1101 | if (DEBUG) { | |
1102 | Dbprintf("Snooping buffers initialized:"); | |
1103 | Dbprintf(" Trace: %i bytes", BigBuf_max_traceLen()); | |
1104 | Dbprintf(" Reader -> tag: %i bytes", ISO15693_MAX_COMMAND_LENGTH); | |
1105 | Dbprintf(" tag -> Reader: %i bytes", ISO15693_MAX_RESPONSE_LENGTH); | |
1106 | Dbprintf(" DMA: %i bytes", ISO15693_DMA_BUFFER_SIZE * sizeof(uint16_t)); | |
1107 | } | |
5ea2a248 | 1108 | Dbprintf("Snoop started. Press PM3 Button to stop."); |
a66f26da | 1109 | |
5ea2a248 | 1110 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER | FPGA_HF_READER_MODE_SNOOP_AMPLITUDE); |
9455b51c | 1111 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); |
1112 | ||
d9de20fa | 1113 | // Setup for the DMA. |
5ea2a248 | 1114 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); |
d9de20fa | 1115 | upTo = dmaBuf; |
1116 | FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE); | |
9455b51c | 1117 | |
d9de20fa | 1118 | bool TagIsActive = false; |
1119 | bool ReaderIsActive = false; | |
1120 | bool ExpectTagAnswer = false; | |
9455b51c | 1121 | |
d9de20fa | 1122 | // And now we loop, receiving samples. |
1123 | for(;;) { | |
1124 | uint16_t behindBy = ((uint16_t*)AT91C_BASE_PDC_SSC->PDC_RPR - upTo) & (ISO15693_DMA_BUFFER_SIZE-1); | |
1125 | ||
1126 | if (behindBy == 0) continue; | |
1127 | ||
1128 | uint16_t snoopdata = *upTo++; | |
1129 | ||
1130 | if(upTo >= dmaBuf + ISO15693_DMA_BUFFER_SIZE) { // we have read all of the DMA buffer content. | |
1131 | upTo = dmaBuf; // start reading the circular buffer from the beginning | |
1132 | if(behindBy > (9*ISO15693_DMA_BUFFER_SIZE/10)) { | |
1133 | Dbprintf("About to blow circular buffer - aborted! behindBy=%d, samples=%d", behindBy, samples); | |
1134 | break; | |
1135 | } | |
1136 | if (AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_ENDRX)) { // DMA Counter Register had reached 0, already rotated. | |
1137 | AT91C_BASE_PDC_SSC->PDC_RNPR = (uint32_t) dmaBuf; // refresh the DMA Next Buffer and | |
1138 | AT91C_BASE_PDC_SSC->PDC_RNCR = ISO15693_DMA_BUFFER_SIZE; // DMA Next Counter registers | |
1139 | WDT_HIT(); | |
1140 | if(BUTTON_PRESS()) { | |
1141 | DbpString("Snoop stopped."); | |
1142 | break; | |
1143 | } | |
1144 | } | |
1145 | } | |
1146 | samples++; | |
a66f26da | 1147 | |
d9de20fa | 1148 | if (!TagIsActive) { // no need to try decoding reader data if the tag is sending |
1149 | if (Handle15693SampleFromReader(snoopdata & 0x02, &DecodeReader)) { | |
1150 | FpgaDisableSscDma(); | |
1151 | ExpectTagAnswer = true; | |
1152 | LogTrace(DecodeReader.output, DecodeReader.byteCount, samples, samples, NULL, true); | |
1153 | /* And ready to receive another command. */ | |
1154 | DecodeReaderReset(&DecodeReader); | |
1155 | /* And also reset the demod code, which might have been */ | |
1156 | /* false-triggered by the commands from the reader. */ | |
1157 | DecodeTagReset(&DecodeTag); | |
1158 | upTo = dmaBuf; | |
1159 | FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE); | |
1160 | } | |
1161 | if (Handle15693SampleFromReader(snoopdata & 0x01, &DecodeReader)) { | |
1162 | FpgaDisableSscDma(); | |
1163 | ExpectTagAnswer = true; | |
1164 | LogTrace(DecodeReader.output, DecodeReader.byteCount, samples, samples, NULL, true); | |
1165 | /* And ready to receive another command. */ | |
1166 | DecodeReaderReset(&DecodeReader); | |
1167 | /* And also reset the demod code, which might have been */ | |
1168 | /* false-triggered by the commands from the reader. */ | |
1169 | DecodeTagReset(&DecodeTag); | |
1170 | upTo = dmaBuf; | |
1171 | FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE); | |
1172 | } | |
1173 | ReaderIsActive = (DecodeReader.state >= STATE_READER_AWAIT_2ND_RISING_EDGE_OF_SOF); | |
9455b51c | 1174 | } |
d9de20fa | 1175 | |
a66f26da | 1176 | if (!ReaderIsActive && ExpectTagAnswer) { // no need to try decoding tag data if the reader is currently sending or no answer expected yet |
d9de20fa | 1177 | if (Handle15693SamplesFromTag(snoopdata >> 2, &DecodeTag)) { |
1178 | FpgaDisableSscDma(); | |
1179 | //Use samples as a time measurement | |
1180 | LogTrace(DecodeTag.output, DecodeTag.len, samples, samples, NULL, false); | |
1181 | // And ready to receive another response. | |
1182 | DecodeTagReset(&DecodeTag); | |
1183 | DecodeReaderReset(&DecodeReader); | |
1184 | ExpectTagAnswer = false; | |
1185 | upTo = dmaBuf; | |
1186 | FpgaSetupSscDma((uint8_t*) dmaBuf, ISO15693_DMA_BUFFER_SIZE); | |
1187 | } | |
1188 | TagIsActive = (DecodeTag.state >= STATE_TAG_RECEIVING_DATA); | |
1189 | } | |
1190 | ||
9455b51c | 1191 | } |
70b2fc0a | 1192 | |
d9de20fa | 1193 | FpgaDisableSscDma(); |
1194 | BigBuf_free(); | |
a66f26da | 1195 | |
d9de20fa | 1196 | LEDsoff(); |
1197 | ||
1198 | DbpString("Snoop statistics:"); | |
1199 | Dbprintf(" ExpectTagAnswer: %d", ExpectTagAnswer); | |
1200 | Dbprintf(" DecodeTag State: %d", DecodeTag.state); | |
1201 | Dbprintf(" DecodeTag byteCnt: %d", DecodeTag.len); | |
1202 | Dbprintf(" DecodeReader State: %d", DecodeReader.state); | |
1203 | Dbprintf(" DecodeReader byteCnt: %d", DecodeReader.byteCount); | |
1204 | Dbprintf(" Trace length: %d", BigBuf_get_traceLen()); | |
9455b51c | 1205 | } |
1206 | ||
1207 | ||
8c6cca0b | 1208 | // Initialize the proxmark as iso15k reader |
70b2fc0a | 1209 | static void Iso15693InitReader() { |
7cc204bf | 1210 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
9455b51c | 1211 | // Setup SSC |
e6304bca | 1212 | // FpgaSetupSsc(); |
9455b51c | 1213 | |
1214 | // Start from off (no field generated) | |
70b2fc0a | 1215 | LED_D_OFF(); |
9455b51c | 1216 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
e6304bca | 1217 | SpinDelay(10); |
9455b51c | 1218 | |
1219 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); | |
5ea2a248 | 1220 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); |
9455b51c | 1221 | |
1222 | // Give the tags time to energize | |
70b2fc0a | 1223 | LED_D_ON(); |
5ea2a248 | 1224 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER); |
e6304bca | 1225 | SpinDelay(250); |
9455b51c | 1226 | } |
1227 | ||
1228 | /////////////////////////////////////////////////////////////////////// | |
1229 | // ISO 15693 Part 3 - Air Interface | |
70b2fc0a | 1230 | // This section basically contains transmission and receiving of bits |
9455b51c | 1231 | /////////////////////////////////////////////////////////////////////// |
1232 | ||
9455b51c | 1233 | |
1234 | // uid is in transmission order (which is reverse of display order) | |
1235 | static void BuildReadBlockRequest(uint8_t *uid, uint8_t blockNumber ) | |
1236 | { | |
1237 | uint8_t cmd[13]; | |
1238 | ||
1239 | uint16_t crc; | |
d9de20fa | 1240 | // If we set the Option_Flag in this request, the VICC will respond with the security status of the block |
1241 | // followed by the block data | |
a66f26da | 1242 | cmd[0] = ISO15693_REQ_OPTION | ISO15693_REQ_ADDRESS | ISO15693_REQ_DATARATE_HIGH; |
9455b51c | 1243 | // READ BLOCK command code |
d9de20fa | 1244 | cmd[1] = ISO15693_READBLOCK; |
9455b51c | 1245 | // UID may be optionally specified here |
1246 | // 64-bit UID | |
1247 | cmd[2] = uid[0]; | |
1248 | cmd[3] = uid[1]; | |
1249 | cmd[4] = uid[2]; | |
1250 | cmd[5] = uid[3]; | |
1251 | cmd[6] = uid[4]; | |
1252 | cmd[7] = uid[5]; | |
1253 | cmd[8] = uid[6]; | |
1254 | cmd[9] = uid[7]; // 0xe0; // always e0 (not exactly unique) | |
1255 | // Block number to read | |
d9de20fa | 1256 | cmd[10] = blockNumber; |
9455b51c | 1257 | //Now the CRC |
3d2c9c9b | 1258 | crc = Iso15693Crc(cmd, 11); // the crc needs to be calculated over 11 bytes |
9455b51c | 1259 | cmd[11] = crc & 0xff; |
1260 | cmd[12] = crc >> 8; | |
1261 | ||
1262 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1263 | } | |
1264 | ||
70b2fc0a | 1265 | |
9455b51c | 1266 | // Now the VICC>VCD responses when we are simulating a tag |
8c6cca0b | 1267 | static void BuildInventoryResponse(uint8_t *uid) |
9455b51c | 1268 | { |
1269 | uint8_t cmd[12]; | |
1270 | ||
1271 | uint16_t crc; | |
8c6cca0b | 1272 | |
1273 | cmd[0] = 0; // No error, no protocol format extension | |
3fe4ff4f | 1274 | cmd[1] = 0; // DSFID (data storage format identifier). 0x00 = not supported |
9455b51c | 1275 | // 64-bit UID |
3fe4ff4f | 1276 | cmd[2] = uid[7]; //0x32; |
1277 | cmd[3] = uid[6]; //0x4b; | |
1278 | cmd[4] = uid[5]; //0x03; | |
1279 | cmd[5] = uid[4]; //0x01; | |
1280 | cmd[6] = uid[3]; //0x00; | |
1281 | cmd[7] = uid[2]; //0x10; | |
1282 | cmd[8] = uid[1]; //0x05; | |
1283 | cmd[9] = uid[0]; //0xe0; | |
9455b51c | 1284 | //Now the CRC |
3d2c9c9b | 1285 | crc = Iso15693Crc(cmd, 10); |
9455b51c | 1286 | cmd[10] = crc & 0xff; |
1287 | cmd[11] = crc >> 8; | |
1288 | ||
8c6cca0b | 1289 | CodeIso15693AsTag(cmd, sizeof(cmd)); |
9455b51c | 1290 | } |
1291 | ||
e6304bca | 1292 | // Universal Method for sending to and recv bytes from a tag |
a66f26da | 1293 | // init ... should we initialize the reader? |
1294 | // speed ... 0 low speed, 1 hi speed | |
1295 | // *recv will contain the tag's answer | |
1296 | // return: lenght of received data | |
d9de20fa | 1297 | int SendDataTag(uint8_t *send, int sendlen, bool init, int speed, uint8_t *recv, uint16_t max_recv_len, uint32_t start_time) { |
9455b51c | 1298 | |
9455b51c | 1299 | LED_A_ON(); |
70b2fc0a | 1300 | LED_B_OFF(); |
9455b51c | 1301 | LED_C_OFF(); |
8c6cca0b | 1302 | |
09ffd16e | 1303 | if (init) Iso15693InitReader(); |
1304 | ||
9455b51c | 1305 | int answerLen=0; |
9455b51c | 1306 | |
9455b51c | 1307 | if (!speed) { |
1308 | // low speed (1 out of 256) | |
1309 | CodeIso15693AsReader256(send, sendlen); | |
1310 | } else { | |
1311 | // high speed (1 out of 4) | |
1312 | CodeIso15693AsReader(send, sendlen); | |
1313 | } | |
8c6cca0b | 1314 | |
d9de20fa | 1315 | TransmitTo15693Tag(ToSend, ToSendMax, start_time); |
1316 | ||
9455b51c | 1317 | // Now wait for a response |
d9de20fa | 1318 | if (recv != NULL) { |
5ea2a248 | 1319 | answerLen = GetIso15693AnswerFromTag(recv, max_recv_len, DELAY_ISO15693_VCD_TO_VICC_READER * 2); |
9455b51c | 1320 | } |
1321 | ||
1322 | LED_A_OFF(); | |
8c6cca0b | 1323 | |
9455b51c | 1324 | return answerLen; |
1325 | } | |
15c4dc5a | 1326 | |
15c4dc5a | 1327 | |
9455b51c | 1328 | // -------------------------------------------------------------------- |
8c6cca0b | 1329 | // Debug Functions |
9455b51c | 1330 | // -------------------------------------------------------------------- |
15c4dc5a | 1331 | |
9455b51c | 1332 | // Decodes a message from a tag and displays its metadata and content |
1333 | #define DBD15STATLEN 48 | |
1334 | void DbdecodeIso15693Answer(int len, uint8_t *d) { | |
1335 | char status[DBD15STATLEN+1]={0}; | |
1336 | uint16_t crc; | |
1337 | ||
d9de20fa | 1338 | if (len > 3) { |
1339 | if (d[0] & ISO15693_RES_EXT) | |
1340 | strncat(status,"ProtExt ", DBD15STATLEN); | |
1341 | if (d[0] & ISO15693_RES_ERROR) { | |
9455b51c | 1342 | // error |
d9de20fa | 1343 | strncat(status,"Error ", DBD15STATLEN); |
9455b51c | 1344 | switch (d[1]) { |
8c6cca0b | 1345 | case 0x01: |
d9de20fa | 1346 | strncat(status,"01:notSupp", DBD15STATLEN); |
15c4dc5a | 1347 | break; |
8c6cca0b | 1348 | case 0x02: |
d9de20fa | 1349 | strncat(status,"02:notRecog", DBD15STATLEN); |
9455b51c | 1350 | break; |
8c6cca0b | 1351 | case 0x03: |
d9de20fa | 1352 | strncat(status,"03:optNotSupp", DBD15STATLEN); |
9455b51c | 1353 | break; |
8c6cca0b | 1354 | case 0x0f: |
d9de20fa | 1355 | strncat(status,"0f:noInfo", DBD15STATLEN); |
9455b51c | 1356 | break; |
8c6cca0b | 1357 | case 0x10: |
d9de20fa | 1358 | strncat(status,"10:doesn'tExist", DBD15STATLEN); |
9455b51c | 1359 | break; |
8c6cca0b | 1360 | case 0x11: |
d9de20fa | 1361 | strncat(status,"11:lockAgain", DBD15STATLEN); |
9455b51c | 1362 | break; |
8c6cca0b | 1363 | case 0x12: |
d9de20fa | 1364 | strncat(status,"12:locked", DBD15STATLEN); |
9455b51c | 1365 | break; |
8c6cca0b | 1366 | case 0x13: |
d9de20fa | 1367 | strncat(status,"13:progErr", DBD15STATLEN); |
9455b51c | 1368 | break; |
8c6cca0b | 1369 | case 0x14: |
d9de20fa | 1370 | strncat(status,"14:lockErr", DBD15STATLEN); |
9455b51c | 1371 | break; |
1372 | default: | |
d9de20fa | 1373 | strncat(status,"unknownErr", DBD15STATLEN); |
15c4dc5a | 1374 | } |
d9de20fa | 1375 | strncat(status," ", DBD15STATLEN); |
9455b51c | 1376 | } else { |
d9de20fa | 1377 | strncat(status,"NoErr ", DBD15STATLEN); |
15c4dc5a | 1378 | } |
8c6cca0b | 1379 | |
3d2c9c9b | 1380 | crc=Iso15693Crc(d,len-2); |
8c6cca0b | 1381 | if ( (( crc & 0xff ) == d[len-2]) && (( crc >> 8 ) == d[len-1]) ) |
9455b51c | 1382 | strncat(status,"CrcOK",DBD15STATLEN); |
1383 | else | |
8c6cca0b | 1384 | strncat(status,"CrcFail!",DBD15STATLEN); |
9455b51c | 1385 | |
1386 | Dbprintf("%s",status); | |
15c4dc5a | 1387 | } |
1388 | } | |
1389 | ||
9455b51c | 1390 | |
1391 | ||
1392 | /////////////////////////////////////////////////////////////////////// | |
1393 | // Functions called via USB/Client | |
1394 | /////////////////////////////////////////////////////////////////////// | |
1395 | ||
1396 | void SetDebugIso15693(uint32_t debug) { | |
1397 | DEBUG=debug; | |
1398 | Dbprintf("Iso15693 Debug is now %s",DEBUG?"on":"off"); | |
1399 | return; | |
1400 | } | |
1401 | ||
d9de20fa | 1402 | |
5ea2a248 | 1403 | //--------------------------------------------------------------------------------------- |
1404 | // Simulate an ISO15693 reader, perform anti-collision and then attempt to read a sector. | |
15c4dc5a | 1405 | // all demodulation performed in arm rather than host. - greg |
5ea2a248 | 1406 | //--------------------------------------------------------------------------------------- |
f7e3ed82 | 1407 | void ReaderIso15693(uint32_t parameter) |
15c4dc5a | 1408 | { |
70b2fc0a | 1409 | LEDsoff(); |
15c4dc5a | 1410 | LED_A_ON(); |
15c4dc5a | 1411 | |
d9de20fa | 1412 | set_tracing(true); |
a66f26da | 1413 | |
d9de20fa | 1414 | int answerLen = 0; |
3fe4ff4f | 1415 | uint8_t TagUID[8] = {0x00}; |
1416 | ||
09ffd16e | 1417 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
15c4dc5a | 1418 | |
d9de20fa | 1419 | uint8_t answer[ISO15693_MAX_RESPONSE_LENGTH]; |
15c4dc5a | 1420 | |
3fe4ff4f | 1421 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); |
15c4dc5a | 1422 | // Setup SSC |
5ea2a248 | 1423 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_READER); |
15c4dc5a | 1424 | |
1425 | // Start from off (no field generated) | |
a66f26da | 1426 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
1427 | SpinDelay(200); | |
15c4dc5a | 1428 | |
15c4dc5a | 1429 | // Give the tags time to energize |
70b2fc0a | 1430 | LED_D_ON(); |
5ea2a248 | 1431 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER); |
15c4dc5a | 1432 | SpinDelay(200); |
d9de20fa | 1433 | StartCountSspClk(); |
1434 | ||
15c4dc5a | 1435 | |
15c4dc5a | 1436 | // FIRST WE RUN AN INVENTORY TO GET THE TAG UID |
1437 | // THIS MEANS WE CAN PRE-BUILD REQUESTS TO SAVE CPU TIME | |
15c4dc5a | 1438 | |
1439 | // Now send the IDENTIFY command | |
1440 | BuildIdentifyRequest(); | |
d9de20fa | 1441 | TransmitTo15693Tag(ToSend, ToSendMax, 0); |
a66f26da | 1442 | |
15c4dc5a | 1443 | // Now wait for a response |
5ea2a248 | 1444 | answerLen = GetIso15693AnswerFromTag(answer, sizeof(answer), DELAY_ISO15693_VCD_TO_VICC_READER * 2) ; |
1445 | uint32_t start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER; | |
15c4dc5a | 1446 | |
d9de20fa | 1447 | if (answerLen >=12) // we should do a better check than this |
15c4dc5a | 1448 | { |
d9de20fa | 1449 | TagUID[0] = answer[2]; |
1450 | TagUID[1] = answer[3]; | |
1451 | TagUID[2] = answer[4]; | |
1452 | TagUID[3] = answer[5]; | |
1453 | TagUID[4] = answer[6]; | |
1454 | TagUID[5] = answer[7]; | |
1455 | TagUID[6] = answer[8]; // IC Manufacturer code | |
1456 | TagUID[7] = answer[9]; // always E0 | |
15c4dc5a | 1457 | |
15c4dc5a | 1458 | } |
1459 | ||
d9de20fa | 1460 | Dbprintf("%d octets read from IDENTIFY request:", answerLen); |
1461 | DbdecodeIso15693Answer(answerLen, answer); | |
1462 | Dbhexdump(answerLen, answer, false); | |
9455b51c | 1463 | |
1464 | // UID is reverse | |
d9de20fa | 1465 | if (answerLen >= 12) |
3fe4ff4f | 1466 | Dbprintf("UID = %02hX%02hX%02hX%02hX%02hX%02hX%02hX%02hX", |
1467 | TagUID[7],TagUID[6],TagUID[5],TagUID[4], | |
1468 | TagUID[3],TagUID[2],TagUID[1],TagUID[0]); | |
9455b51c | 1469 | |
1470 | ||
315e18e6 | 1471 | // Dbprintf("%d octets read from SELECT request:", answerLen2); |
1472 | // DbdecodeIso15693Answer(answerLen2,answer2); | |
1473 | // Dbhexdump(answerLen2,answer2,true); | |
9455b51c | 1474 | |
315e18e6 | 1475 | // Dbprintf("%d octets read from XXX request:", answerLen3); |
1476 | // DbdecodeIso15693Answer(answerLen3,answer3); | |
1477 | // Dbhexdump(answerLen3,answer3,true); | |
9455b51c | 1478 | |
9455b51c | 1479 | // read all pages |
d9de20fa | 1480 | if (answerLen >= 12 && DEBUG) { |
5ea2a248 | 1481 | for (int i = 0; i < 32; i++) { // sanity check, assume max 32 pages |
8c6cca0b | 1482 | BuildReadBlockRequest(TagUID, i); |
d9de20fa | 1483 | TransmitTo15693Tag(ToSend, ToSendMax, start_time); |
5ea2a248 | 1484 | int answerLen = GetIso15693AnswerFromTag(answer, sizeof(answer), DELAY_ISO15693_VCD_TO_VICC_READER * 2); |
1485 | start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER; | |
d9de20fa | 1486 | if (answerLen > 0) { |
1487 | Dbprintf("READ SINGLE BLOCK %d returned %d octets:", i, answerLen); | |
1488 | DbdecodeIso15693Answer(answerLen, answer); | |
1489 | Dbhexdump(answerLen, answer, false); | |
1490 | if ( *((uint32_t*) answer) == 0x07160101 ) break; // exit on NoPageErr | |
8c6cca0b | 1491 | } |
8c6cca0b | 1492 | } |
9455b51c | 1493 | } |
15c4dc5a | 1494 | |
8c6cca0b | 1495 | // for the time being, switch field off to protect rdv4.0 |
70b2fc0a | 1496 | // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway |
a66f26da | 1497 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
15c4dc5a | 1498 | LED_D_OFF(); |
8c6cca0b | 1499 | |
70b2fc0a | 1500 | LED_A_OFF(); |
15c4dc5a | 1501 | } |
1502 | ||
8c6cca0b | 1503 | |
1504 | // Simulate an ISO15693 TAG. | |
1505 | // For Inventory command: print command and send Inventory Response with given UID | |
1506 | // TODO: interpret other reader commands and send appropriate response | |
3fe4ff4f | 1507 | void SimTagIso15693(uint32_t parameter, uint8_t *uid) |
15c4dc5a | 1508 | { |
70b2fc0a | 1509 | LEDsoff(); |
15c4dc5a | 1510 | LED_A_ON(); |
15c4dc5a | 1511 | |
7cc204bf | 1512 | FpgaDownloadAndGo(FPGA_BITSTREAM_HF); |
15c4dc5a | 1513 | SetAdcMuxFor(GPIO_MUXSEL_HIPKD); |
a66f26da | 1514 | FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_SIMULATOR | FPGA_HF_SIMULATOR_NO_MODULATION); |
8c6cca0b | 1515 | FpgaSetupSsc(FPGA_MAJOR_MODE_HF_SIMULATOR); |
15c4dc5a | 1516 | |
8c6cca0b | 1517 | StartCountSspClk(); |
15c4dc5a | 1518 | |
8c6cca0b | 1519 | uint8_t cmd[ISO15693_MAX_COMMAND_LENGTH]; |
15c4dc5a | 1520 | |
8c6cca0b | 1521 | // Build a suitable response to the reader INVENTORY command |
1522 | BuildInventoryResponse(uid); | |
15c4dc5a | 1523 | |
8c6cca0b | 1524 | // Listen to reader |
1525 | while (!BUTTON_PRESS()) { | |
1526 | uint32_t eof_time = 0, start_time = 0; | |
1527 | int cmd_len = GetIso15693CommandFromReader(cmd, sizeof(cmd), &eof_time); | |
1528 | ||
1529 | if ((cmd_len >= 5) && (cmd[0] & ISO15693_REQ_INVENTORY) && (cmd[1] == ISO15693_INVENTORY)) { // TODO: check more flags | |
1530 | bool slow = !(cmd[0] & ISO15693_REQ_DATARATE_HIGH); | |
5ea2a248 | 1531 | start_time = eof_time + DELAY_ISO15693_VCD_TO_VICC_SIM - DELAY_ARM_TO_READER_SIM; |
8c6cca0b | 1532 | TransmitTo15693Reader(ToSend, ToSendMax, start_time, slow); |
1533 | } | |
3fe4ff4f | 1534 | |
8c6cca0b | 1535 | Dbprintf("%d bytes read from reader:", cmd_len); |
1536 | Dbhexdump(cmd_len, cmd, false); | |
1537 | } | |
15c4dc5a | 1538 | |
a66f26da | 1539 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
70b2fc0a | 1540 | LEDsoff(); |
15c4dc5a | 1541 | } |
9455b51c | 1542 | |
1543 | ||
1544 | // Since there is no standardized way of reading the AFI out of a tag, we will brute force it | |
1545 | // (some manufactures offer a way to read the AFI, though) | |
8c6cca0b | 1546 | void BruteforceIso15693Afi(uint32_t speed) |
1547 | { | |
70b2fc0a | 1548 | LEDsoff(); |
1549 | LED_A_ON(); | |
8c6cca0b | 1550 | |
d9de20fa | 1551 | uint8_t data[6]; |
1552 | uint8_t recv[ISO15693_MAX_RESPONSE_LENGTH]; | |
a66f26da | 1553 | |
9455b51c | 1554 | int datalen=0, recvlen=0; |
8c6cca0b | 1555 | |
9455b51c | 1556 | Iso15693InitReader(); |
d9de20fa | 1557 | StartCountSspClk(); |
a66f26da | 1558 | |
9455b51c | 1559 | // first without AFI |
8c6cca0b | 1560 | // Tags should respond without AFI and with AFI=0 even when AFI is active |
1561 | ||
1562 | data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_SLOT1; | |
1563 | data[1] = ISO15693_INVENTORY; | |
1564 | data[2] = 0; // mask length | |
3d2c9c9b | 1565 | datalen = Iso15693AddCrc(data,3); |
d9de20fa | 1566 | recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), 0); |
5ea2a248 | 1567 | uint32_t start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER; |
9455b51c | 1568 | WDT_HIT(); |
1569 | if (recvlen>=12) { | |
3d2c9c9b | 1570 | Dbprintf("NoAFI UID=%s", Iso15693sprintUID(NULL, &recv[2])); |
9455b51c | 1571 | } |
8c6cca0b | 1572 | |
9455b51c | 1573 | // now with AFI |
8c6cca0b | 1574 | |
1575 | data[0] = ISO15693_REQ_DATARATE_HIGH | ISO15693_REQ_INVENTORY | ISO15693_REQINV_AFI | ISO15693_REQINV_SLOT1; | |
1576 | data[1] = ISO15693_INVENTORY; | |
1577 | data[2] = 0; // AFI | |
1578 | data[3] = 0; // mask length | |
1579 | ||
d9de20fa | 1580 | for (int i = 0; i < 256; i++) { |
1581 | data[2] = i & 0xFF; | |
3d2c9c9b | 1582 | datalen = Iso15693AddCrc(data,4); |
d9de20fa | 1583 | recvlen = SendDataTag(data, datalen, false, speed, recv, sizeof(recv), start_time); |
5ea2a248 | 1584 | start_time = GetCountSspClk() + DELAY_ISO15693_VICC_TO_VCD_READER; |
9455b51c | 1585 | WDT_HIT(); |
d9de20fa | 1586 | if (recvlen >= 12) { |
3d2c9c9b | 1587 | Dbprintf("AFI=%i UID=%s", i, Iso15693sprintUID(NULL, &recv[2])); |
9455b51c | 1588 | } |
8c6cca0b | 1589 | } |
9455b51c | 1590 | Dbprintf("AFI Bruteforcing done."); |
8c6cca0b | 1591 | |
a66f26da | 1592 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
70b2fc0a | 1593 | LEDsoff(); |
9455b51c | 1594 | } |
1595 | ||
1596 | // Allows to directly send commands to the tag via the client | |
70b2fc0a | 1597 | void DirectTag15693Command(uint32_t datalen, uint32_t speed, uint32_t recv, uint8_t data[]) { |
9455b51c | 1598 | |
d9de20fa | 1599 | int recvlen = 0; |
1600 | uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH]; | |
8c6cca0b | 1601 | |
70b2fc0a | 1602 | LED_A_ON(); |
8c6cca0b | 1603 | |
9455b51c | 1604 | if (DEBUG) { |
d9de20fa | 1605 | Dbprintf("SEND:"); |
8c6cca0b | 1606 | Dbhexdump(datalen, data, false); |
9455b51c | 1607 | } |
8c6cca0b | 1608 | |
d9de20fa | 1609 | recvlen = SendDataTag(data, datalen, true, speed, (recv?recvbuf:NULL), sizeof(recvbuf), 0); |
9455b51c | 1610 | |
8c6cca0b | 1611 | if (recv) { |
9455b51c | 1612 | if (DEBUG) { |
d9de20fa | 1613 | Dbprintf("RECV:"); |
8c6cca0b | 1614 | Dbhexdump(recvlen, recvbuf, false); |
d9de20fa | 1615 | DbdecodeIso15693Answer(recvlen, recvbuf); |
9455b51c | 1616 | } |
d9de20fa | 1617 | |
1618 | cmd_send(CMD_ACK, recvlen>ISO15693_MAX_RESPONSE_LENGTH?ISO15693_MAX_RESPONSE_LENGTH:recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH); | |
1619 | ||
9455b51c | 1620 | } |
1621 | ||
8c6cca0b | 1622 | // for the time being, switch field off to protect rdv4.0 |
70b2fc0a | 1623 | // note: this prevents using hf 15 cmd with s option - which isn't implemented yet anyway |
a66f26da | 1624 | FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); |
70b2fc0a | 1625 | LED_D_OFF(); |
8c6cca0b | 1626 | |
70b2fc0a | 1627 | LED_A_OFF(); |
9455b51c | 1628 | } |
1629 | ||
096dee17 | 1630 | //----------------------------------------------------------------------------- |
1631 | // Work with "magic Chinese" card. | |
1632 | // | |
1633 | //----------------------------------------------------------------------------- | |
1634 | ||
1635 | // Set the UID to the tag (based on Iceman work). | |
1636 | void SetTag15693Uid(uint8_t *uid) | |
1637 | { | |
a66f26da | 1638 | uint8_t cmd[4][9] = {0x00}; |
1639 | ||
1640 | uint16_t crc; | |
1641 | ||
1642 | int recvlen = 0; | |
1643 | uint8_t recvbuf[ISO15693_MAX_RESPONSE_LENGTH]; | |
1644 | ||
1645 | LED_A_ON(); | |
1646 | ||
1647 | // Command 1 : 02213E00000000 | |
1648 | cmd[0][0] = 0x02; | |
1649 | cmd[0][1] = 0x21; | |
1650 | cmd[0][2] = 0x3e; | |
1651 | cmd[0][3] = 0x00; | |
1652 | cmd[0][4] = 0x00; | |
1653 | cmd[0][5] = 0x00; | |
1654 | cmd[0][6] = 0x00; | |
1655 | ||
1656 | // Command 2 : 02213F69960000 | |
1657 | cmd[1][0] = 0x02; | |
1658 | cmd[1][1] = 0x21; | |
1659 | cmd[1][2] = 0x3f; | |
1660 | cmd[1][3] = 0x69; | |
1661 | cmd[1][4] = 0x96; | |
1662 | cmd[1][5] = 0x00; | |
1663 | cmd[1][6] = 0x00; | |
1664 | ||
1665 | // Command 3 : 022138u8u7u6u5 (where uX = uid byte X) | |
1666 | cmd[2][0] = 0x02; | |
1667 | cmd[2][1] = 0x21; | |
1668 | cmd[2][2] = 0x38; | |
1669 | cmd[2][3] = uid[7]; | |
1670 | cmd[2][4] = uid[6]; | |
1671 | cmd[2][5] = uid[5]; | |
1672 | cmd[2][6] = uid[4]; | |
1673 | ||
1674 | // Command 4 : 022139u4u3u2u1 (where uX = uid byte X) | |
1675 | cmd[3][0] = 0x02; | |
1676 | cmd[3][1] = 0x21; | |
1677 | cmd[3][2] = 0x39; | |
1678 | cmd[3][3] = uid[3]; | |
1679 | cmd[3][4] = uid[2]; | |
1680 | cmd[3][5] = uid[1]; | |
1681 | cmd[3][6] = uid[0]; | |
1682 | ||
1683 | for (int i=0; i<4; i++) { | |
1684 | // Add the CRC | |
1685 | crc = Iso15693Crc(cmd[i], 7); | |
1686 | cmd[i][7] = crc & 0xff; | |
1687 | cmd[i][8] = crc >> 8; | |
1688 | ||
1689 | if (DEBUG) { | |
1690 | Dbprintf("SEND:"); | |
1691 | Dbhexdump(sizeof(cmd[i]), cmd[i], false); | |
1692 | } | |
1693 | ||
1694 | recvlen = SendDataTag(cmd[i], sizeof(cmd[i]), true, 1, recvbuf, sizeof(recvbuf), 0); | |
1695 | ||
1696 | if (DEBUG) { | |
1697 | Dbprintf("RECV:"); | |
1698 | Dbhexdump(recvlen, recvbuf, false); | |
1699 | DbdecodeIso15693Answer(recvlen, recvbuf); | |
1700 | } | |
1701 | ||
1702 | cmd_send(CMD_ACK, recvlen>ISO15693_MAX_RESPONSE_LENGTH?ISO15693_MAX_RESPONSE_LENGTH:recvlen, 0, 0, recvbuf, ISO15693_MAX_RESPONSE_LENGTH); | |
1703 | } | |
1704 | ||
1705 | LED_D_OFF(); | |
1706 | ||
1707 | LED_A_OFF(); | |
096dee17 | 1708 | } |
9455b51c | 1709 | |
1710 | ||
1711 | ||
1712 | // -------------------------------------------------------------------- | |
1713 | // -- Misc & deprecated functions | |
1714 | // -------------------------------------------------------------------- | |
1715 | ||
e6304bca | 1716 | /* |
9455b51c | 1717 | |
1718 | // do not use; has a fix UID | |
1719 | static void __attribute__((unused)) BuildSysInfoRequest(uint8_t *uid) | |
1720 | { | |
1721 | uint8_t cmd[12]; | |
1722 | ||
1723 | uint16_t crc; | |
5ea2a248 | 1724 | // If we set the Option_Flag in this request, the VICC will respond with the security status of the block |
1725 | // followed by the block data | |
9455b51c | 1726 | // one sub-carrier, inventory, 1 slot, fast rate |
1727 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1728 | // System Information command code | |
1729 | cmd[1] = 0x2B; | |
1730 | // UID may be optionally specified here | |
1731 | // 64-bit UID | |
1732 | cmd[2] = 0x32; | |
1733 | cmd[3]= 0x4b; | |
1734 | cmd[4] = 0x03; | |
1735 | cmd[5] = 0x01; | |
1736 | cmd[6] = 0x00; | |
1737 | cmd[7] = 0x10; | |
1738 | cmd[8] = 0x05; | |
1739 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1740 | //Now the CRC | |
3d2c9c9b | 1741 | crc = Iso15693Crc(cmd, 10); // the crc needs to be calculated over 2 bytes |
9455b51c | 1742 | cmd[10] = crc & 0xff; |
1743 | cmd[11] = crc >> 8; | |
1744 | ||
1745 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1746 | } | |
1747 | ||
9455b51c | 1748 | |
1749 | // do not use; has a fix UID | |
1750 | static void __attribute__((unused)) BuildReadMultiBlockRequest(uint8_t *uid) | |
1751 | { | |
1752 | uint8_t cmd[14]; | |
1753 | ||
1754 | uint16_t crc; | |
5ea2a248 | 1755 | // If we set the Option_Flag in this request, the VICC will respond with the security status of the block |
1756 | // followed by the block data | |
9455b51c | 1757 | // one sub-carrier, inventory, 1 slot, fast rate |
1758 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1759 | // READ Multi BLOCK command code | |
1760 | cmd[1] = 0x23; | |
1761 | // UID may be optionally specified here | |
1762 | // 64-bit UID | |
1763 | cmd[2] = 0x32; | |
1764 | cmd[3]= 0x4b; | |
1765 | cmd[4] = 0x03; | |
1766 | cmd[5] = 0x01; | |
1767 | cmd[6] = 0x00; | |
1768 | cmd[7] = 0x10; | |
1769 | cmd[8] = 0x05; | |
1770 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1771 | // First Block number to read | |
1772 | cmd[10] = 0x00; | |
1773 | // Number of Blocks to read | |
1774 | cmd[11] = 0x2f; // read quite a few | |
1775 | //Now the CRC | |
3d2c9c9b | 1776 | crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes |
9455b51c | 1777 | cmd[12] = crc & 0xff; |
1778 | cmd[13] = crc >> 8; | |
1779 | ||
1780 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1781 | } | |
1782 | ||
1783 | // do not use; has a fix UID | |
1784 | static void __attribute__((unused)) BuildArbitraryRequest(uint8_t *uid,uint8_t CmdCode) | |
1785 | { | |
1786 | uint8_t cmd[14]; | |
1787 | ||
1788 | uint16_t crc; | |
5ea2a248 | 1789 | // If we set the Option_Flag in this request, the VICC will respond with the security status of the block |
1790 | // followed by the block data | |
9455b51c | 1791 | // one sub-carrier, inventory, 1 slot, fast rate |
1792 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1793 | // READ BLOCK command code | |
1794 | cmd[1] = CmdCode; | |
1795 | // UID may be optionally specified here | |
1796 | // 64-bit UID | |
1797 | cmd[2] = 0x32; | |
1798 | cmd[3]= 0x4b; | |
1799 | cmd[4] = 0x03; | |
1800 | cmd[5] = 0x01; | |
1801 | cmd[6] = 0x00; | |
1802 | cmd[7] = 0x10; | |
1803 | cmd[8] = 0x05; | |
1804 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1805 | // Parameter | |
1806 | cmd[10] = 0x00; | |
1807 | cmd[11] = 0x0a; | |
1808 | ||
a66f26da | 1809 | // cmd[12] = 0x00; |
1810 | // cmd[13] = 0x00; //Now the CRC | |
3d2c9c9b | 1811 | crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes |
9455b51c | 1812 | cmd[12] = crc & 0xff; |
1813 | cmd[13] = crc >> 8; | |
1814 | ||
1815 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1816 | } | |
1817 | ||
1818 | // do not use; has a fix UID | |
1819 | static void __attribute__((unused)) BuildArbitraryCustomRequest(uint8_t uid[], uint8_t CmdCode) | |
1820 | { | |
1821 | uint8_t cmd[14]; | |
1822 | ||
1823 | uint16_t crc; | |
5ea2a248 | 1824 | // If we set the Option_Flag in this request, the VICC will respond with the security status of the block |
1825 | // followed by the block data | |
9455b51c | 1826 | // one sub-carrier, inventory, 1 slot, fast rate |
1827 | cmd[0] = (1 << 5) | (1 << 1); // no SELECT bit | |
1828 | // READ BLOCK command code | |
1829 | cmd[1] = CmdCode; | |
1830 | // UID may be optionally specified here | |
1831 | // 64-bit UID | |
1832 | cmd[2] = 0x32; | |
1833 | cmd[3]= 0x4b; | |
1834 | cmd[4] = 0x03; | |
1835 | cmd[5] = 0x01; | |
1836 | cmd[6] = 0x00; | |
1837 | cmd[7] = 0x10; | |
1838 | cmd[8] = 0x05; | |
1839 | cmd[9]= 0xe0; // always e0 (not exactly unique) | |
1840 | // Parameter | |
5ea2a248 | 1841 | cmd[10] = 0x05; // for custom codes this must be manufacturer code |
9455b51c | 1842 | cmd[11] = 0x00; |
1843 | ||
a66f26da | 1844 | // cmd[12] = 0x00; |
1845 | // cmd[13] = 0x00; //Now the CRC | |
3d2c9c9b | 1846 | crc = Iso15693Crc(cmd, 12); // the crc needs to be calculated over 2 bytes |
9455b51c | 1847 | cmd[12] = crc & 0xff; |
1848 | cmd[13] = crc >> 8; | |
1849 | ||
1850 | CodeIso15693AsReader(cmd, sizeof(cmd)); | |
1851 | } | |
1852 | ||
1853 | ||
1854 | ||
1855 | ||
e6304bca | 1856 | */ |
9455b51c | 1857 | |
1858 |