├── LICENSE ├── M24SR.cpp ├── M24SR.h ├── README.md └── examples ├── DisplaySystemFile └── DisplaySystemFile.ino ├── NDefWrite └── NDefWrite.ino └── NfcTagDisplay └── NfcTagDisplay.ino /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. By contrast, the GNU General Public 13 | License is intended to guarantee your freedom to share and change free 14 | software--to make sure the software is free for all its users. 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If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. -------------------------------------------------------------------------------- /M24SR.cpp: -------------------------------------------------------------------------------- 1 | /* Arduino library for ST M24SR Dynamic NFC/RFID tag IC with EEPROM, NFC Forum Type 4 Tag and I2C interface 2 | (c) 2014 by ReNa http://regnerischernachmittag.wordpress.com/ 3 | */ 4 | 5 | #include 6 | #include 7 | #include 8 | #include //prog_char 9 | 10 | prog_char AID_NDEF_TAG_APPLICATION2[] PROGMEM = "\xD2\x76\x00\x00\x85\x01\x01"; 11 | prog_char FILE_CC[] PROGMEM = "\xE1\x03"; 12 | prog_char FILE_SYSTEM[] PROGMEM = "\xE1\x01"; 13 | prog_char DEFAULT_PASSWORD[] PROGMEM = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"; 14 | 15 | //prog_char SELECT_NDEF_Tag_Application2[] PROGMEM = "\x00\xA4\x04\x00\x07\xD2\x76\x00\x00\x85\x01\x01"; 16 | //prog_char SELECT_CC[] PROGMEM = "\x00\xA4\x00\x0C\x02\xE1\x03"; 17 | //prog_char SELECT_NDEF_file[] PROGMEM = "\x00\xA4\x00\x0C\x02\x00\x01"; 18 | //prog_char SELECT_system_file[] PROGMEM = "\x00\xA4\x00\x0C\x02\xE1\x01"; 19 | //prog_char UPDATE_BINARY_NDEF_MSG_LEN0[] PROGMEM = "\x00\xD6\x00\x00\x02\x00\x00"; 20 | //prog_char READ_BINARY_LENGTH[] PROGMEM = "\x02\x00\xB0\x00\x00\x02"; 21 | //prog_char READ_BINARY[] PROGMEM = "\x02\x00\xB0\x00\x00"; 22 | //prog_char READ_BINARY_DEF_MSG[] PROGMEM = "\x02\x00\xB0\x00\x02"; 23 | 24 | // 0x45 25 | prog_char SAMPLE_NDEF_message1[] PROGMEM = "\x91\x01\x10\x55\x01\x73\x74\x2E\x63\x6F\x6D\x2F\x6E\x66\x63\x2D\x72\x66\x69\x64\x54\x18\x16\x73\x74\x2E\x63\x6F\x6D\x3A\x6D\x32\x34\x73\x72\x5F\x70\x72\x6F\x70\x72\x69\x65\x74\x61\x72\x73\x4D\x32\x34\x53\x52\x20\x70\x72\x6F\x70\x72\x69\x65\x74\x61\x72\x79\x20\x64\x61\x74\x61"; 26 | //prog_char SAMPLE_NDEF_message2[] PROGMEM = "\xd1\x01\x0a\x55\x03\x6e\x6f\x6b\x69\x61\x2e\x63\x6f\x6d"; 27 | 28 | // 0x0F www.st.com 29 | //prog_char SAMPLE_NDEF_message2[] PROGMEM = "\xD1\x01\x0b\x55\x01\x77\x77\x77\x2E\x73\x74\x2E\x63\x6F\x6D"; 30 | 31 | // 0x0c www.nfc.com 32 | //prog_char SAMPLE_NDEF_message2[] PROGMEM = "\xD1\x01\x08\x55\x01\x6E\x66\x63\x2E\x63\x6F\x6D"; 33 | 34 | // 0x11 phone: +358 9 1234567 35 | prog_char SAMPLE_NDEF_message2[] PROGMEM = "\xD1\x01\x0D\x55\x05\x2B\x33\x35\x38\x39\x31\x32\x33\x34\x35\x36\x37"; 36 | 37 | // 0x13 txt: "hello, world" 38 | prog_char SAMPLE_NDEF_message3[] PROGMEM = "\xD1\x01\x0F\x54\x02\x65\x6e\x68\x65\x6c\x6c\x6f\x2c\x20\x77\x6f\x72\x6c\x64"; 39 | 40 | // EMPTY Tag 41 | // 00 03 D0 00 00 42 | 43 | M24SR::M24SR(void) { 44 | _verbose = false; 45 | _cmds = false; 46 | } 47 | 48 | M24SR::M24SR(uint8_t gpo) { 49 | _verbose = false; 50 | _cmds = false; 51 | _gpo_pin = gpo; 52 | } 53 | 54 | void M24SR::_setup() { 55 | if (_verbose) 56 | Serial.println(F("_setup")); 57 | _lastGPO = 1; 58 | _sendGetI2cSession = true; 59 | _deviceaddress = 0x56; 60 | _blockNo = 0; 61 | _responseLength = 0x15; 62 | _response = (byte*)malloc(_responseLength); 63 | 64 | Wire.begin(); // join i2c bus (address optional for master) 65 | if (_gpo_pin != 0) { 66 | pinMode(_gpo_pin, INPUT); 67 | writeGPO(0x61); 68 | } 69 | } 70 | 71 | M24SR::~M24SR() { 72 | if (_responseLength) 73 | { 74 | free(_response); 75 | } 76 | } 77 | 78 | void M24SR::writeGPO(uint8_t value) { 79 | if (_verbose) 80 | Serial.println(F("\r\nwriteGPO")); 81 | if (!verifyI2cPassword()) { 82 | Serial.println(F("\r\nwrong password!!!")); 83 | return; 84 | } 85 | sendApdu_P(0x00, INS_SELECT_FILE, 0x00, 0x0C, 0x02, FILE_SYSTEM); 86 | receiveResponse(2 + 3); 87 | 88 | //write system file at offset 0x0004 GPO 89 | sendApdu(0x00, INS_UPDATE_BINARY, 0x00, 0x04, 0x01, &value); 90 | receiveResponse(2 + 3); 91 | sendDESELECT(); 92 | } 93 | 94 | void M24SR::selectFile_NDEF_App() { 95 | if (_verbose) 96 | Serial.println(F("\r\nselectFile_NDEF_App")); 97 | _sendGetI2cSession = true; 98 | sendApdu_P(0x00, INS_SELECT_FILE, 0x04, 0x00, 0x07, AID_NDEF_TAG_APPLICATION2); 99 | receiveResponse(2 + 3); 100 | } 101 | 102 | boolean M24SR::verifyI2cPassword() { 103 | if (_verbose) 104 | Serial.println(F("\r\nverifyI2cPassword")); 105 | selectFile_NDEF_App(); 106 | sendApdu_P(0x00, INS_VERIFY, 0x00, 0x03, 0x10, DEFAULT_PASSWORD); 107 | receiveResponse(2 + 3); 108 | return ((_response[0] == 0x90) && (_response[1] == 0)); 109 | } 110 | 111 | boolean M24SR::checkGPOTrigger() 112 | { 113 | uint8_t newval = digitalRead(_gpo_pin); 114 | if (newval == 1 && _lastGPO == 0) { 115 | _lastGPO = newval; 116 | return true; 117 | } 118 | _lastGPO = newval; 119 | return false; 120 | } 121 | 122 | void M24SR::updateBinaryLen(int len) { 123 | if (_verbose) 124 | Serial.println(F("\r\nupdateBinaryLen")); 125 | uint8_t len_bytes[] = "\x00\x00"; 126 | len_bytes[0] = (len >> 8) & 0xff; 127 | len_bytes[1] = (len & 0xff); 128 | sendApdu(0x00, INS_UPDATE_BINARY, 0x00, 0x00, 0x02, len_bytes); 129 | } 130 | 131 | void M24SR::updateBinary(char* Data, uint8_t len) { 132 | if (_verbose) 133 | Serial.println(F("\r\nupdateBinary")); 134 | dumpHex((uint8_t*)Data, len); 135 | uint8_t pos = 0; 136 | while(pos < len) { 137 | uint8_t chunk_len = (len - pos); 138 | if (chunk_len > (BUFFER_LENGTH - 8)) 139 | chunk_len = BUFFER_LENGTH - 8; 140 | Serial.print(F("\r\nchunk_len:")); 141 | Serial.print(chunk_len, DEC); 142 | Serial.print(F(", pos:")); 143 | Serial.print(pos, DEC); 144 | sendApdu(0x00, INS_UPDATE_BINARY, ((pos+2) >> 8) & 0xff, (pos+2) & 0xff, chunk_len, (uint8_t*)&Data[pos]); 145 | pos += chunk_len; 146 | if (pos < len) 147 | receiveResponse(2 + 3); 148 | } 149 | } 150 | 151 | void M24SR::updateBinary(unsigned int offset, char* data, uint8_t len) { 152 | if (_verbose) 153 | Serial.println(F("\r\nupdateBinary offset")); 154 | sendApdu(0x00, INS_UPDATE_BINARY, (offset >> 8) & 0xff, (offset & 0xff), len, (uint8_t*)data); 155 | } 156 | 157 | void M24SR::displaySystemFile() { 158 | selectFile_NDEF_App(); 159 | sendApdu_P(0x00, INS_SELECT_FILE, 0x00, 0x0C, 0x02, FILE_SYSTEM); 160 | receiveResponse(2 + 3); 161 | 162 | sendApdu(0x00, INS_READ_BINARY, 0x00, 0x00, 0x02); 163 | receiveResponse(2 + 2 + 3); 164 | 165 | if (_verbose) { 166 | Serial.print(F("\r\nresponse[1]: ")); 167 | Serial.print(_response[1] & 0xff, HEX); 168 | } 169 | 170 | sendApdu(0x00, INS_READ_BINARY, 0x00, 0x00, _response[1]); 171 | receiveResponse((_response[1] & 0xff) + 2 + 3); 172 | 173 | //display settings 174 | Serial.print(F("\r\nUID: ")); 175 | dumpHex(&_response[8], 7); 176 | Serial.print(F("\r\nMemory Size: 0x")); 177 | if ((_response[0xf] & 0xff) < 0x10) 178 | Serial.print("0"); 179 | Serial.print((_response[0xf] & 0xff), HEX); 180 | if ((_response[0x10] & 0xff) < 0x10) 181 | Serial.print("0"); 182 | Serial.print((_response[0x10] & 0xff), HEX); 183 | Serial.print(F("\r\nProduct Code: 0x")); 184 | if ((_response[0x11] & 0xff) < 0x10) 185 | Serial.print("0"); 186 | Serial.print((_response[0x11] & 0xff), HEX); 187 | 188 | sendDESELECT(); 189 | } 190 | 191 | /* 192 | end of a I2c Session: 193 | 5.4 S-Block format 194 | 0xC2: for S(DES) when the DID field is not present 195 | */ 196 | void M24SR::sendDESELECT() { 197 | if (_verbose) 198 | Serial.print(F("\r\nsend DESELECT")); 199 | sendSBLOCK(0xC2);//PCB field 200 | } 201 | 202 | void M24SR::sendSBLOCK(byte sblock) { 203 | _data[0] = sblock; 204 | sendCommand(/*_data,*/ 1, false); 205 | receiveResponse(0 + 3) ; 206 | } 207 | 208 | void M24SR::sendApdu(uint8_t CLA, uint8_t INS, uint8_t P1, uint8_t P2, uint8_t Lc, uint8_t* Data) { 209 | _data[1] = CLA; 210 | _data[2] = INS; 211 | _data[3] = P1; 212 | _data[4] = P2; 213 | _data[5] = Lc; 214 | memcpy(&_data[6], Data, Lc); 215 | sendCommand(/*_data,*/ 1+5+Lc, true); 216 | } 217 | 218 | void M24SR::sendApdu_P(uint8_t CLA, uint8_t INS, uint8_t P1, uint8_t P2, uint8_t Lc, const prog_char* Data) { 219 | _data[1] = CLA; 220 | _data[2] = INS; 221 | _data[3] = P1; 222 | _data[4] = P2; 223 | _data[5] = Lc; 224 | memcpy_P(&_data[6], Data, Lc); 225 | sendCommand(/*_data,*/ 1+5+Lc, true); 226 | } 227 | 228 | //APDU case 2 229 | void M24SR::sendApdu(uint8_t CLA, uint8_t INS, uint8_t P1, uint8_t P2, uint8_t Le) { 230 | _data[1] = CLA; 231 | _data[2] = INS; 232 | _data[3] = P1; 233 | _data[4] = P2; 234 | _data[5] = Le; 235 | sendCommand(/*_data, */1+5, true); 236 | } 237 | 238 | void M24SR::sendCommand(/*char* data,*/ int len) { 239 | sendCommand(/*data,*/ len, true); 240 | } 241 | 242 | // len (incl PCB byte) 243 | void M24SR::sendCommand(/*char* data, */int len, boolean setPCB) { 244 | uint8_t v; 245 | if (setPCB) { 246 | if (_blockNo == 0) { 247 | _data[0] = 0x02; 248 | _blockNo = 1; 249 | } else { 250 | _data[0] = 0x03; 251 | _blockNo = 0; 252 | } 253 | } 254 | if (_sendGetI2cSession) { 255 | Wire.beginTransmission(_deviceaddress); // transmit to device 0x2D 256 | Wire.write(byte(CMD_GETI2CSESSION)); // GetI2Csession 257 | _err = Wire.endTransmission(); // stop transmitting 258 | if (_verbose) { 259 | Serial.print(F("\r\nGetI2Csession: ")); 260 | Serial.print(_err, HEX); 261 | } 262 | else 263 | delay(1); 264 | } 265 | 266 | if (_cmds) 267 | Serial.print(F("\r\n=> ")); 268 | else 269 | delay(1); 270 | 271 | Wire.beginTransmission(_deviceaddress); 272 | 273 | for(int i=0; i < len; i++) { 274 | v = (_data[i] & 0xff); 275 | if (_cmds) { 276 | if (v < 0x10) 277 | Serial.print(F("0")); 278 | Serial.print(v, HEX); 279 | } else 280 | delay(5); 281 | Wire.write(byte(v & 0xff)); 282 | if (_cmds) 283 | Serial.print(F(" ")); 284 | else 285 | delay(1); 286 | } 287 | 288 | //5.5 CRC of the I2C and RF frame ISO/IEC 13239. The initial register content shall be 0x6363 289 | int chksum = crcsum((unsigned char*) _data, len, 0x6363 ); 290 | 291 | v = chksum & 0xff; 292 | if (_cmds) { 293 | if (v < 0x10) { 294 | Serial.print(F("0")); 295 | } 296 | Serial.print(v, HEX); 297 | } else 298 | delay(1); 299 | 300 | Wire.write(byte(v & 0xff)); 301 | 302 | //EOD field 303 | v = (chksum >> 8) & 0xff; 304 | if (_cmds) { 305 | if (v < 0x10) { 306 | Serial.print(F("0")); 307 | } 308 | Serial.print(v, HEX); 309 | } else 310 | delay(1); 311 | Wire.write(byte(v & 0xff)); 312 | 313 | _err = Wire.endTransmission(); 314 | if (_cmds) { 315 | Serial.print(F("\r\n")); 316 | } 317 | else { 318 | delay(1); 319 | } 320 | //TODO does this really work? 321 | if (_err != 0) { 322 | Serial.print(F("write err: ")); 323 | Serial.print(_err, HEX); 324 | } 325 | } 326 | 327 | void M24SR::selectFile_NDEF_file() { 328 | if (_verbose) 329 | Serial.print(F("\r\nselectFile_NDEF_file")); 330 | uint8_t ndef_file[] = "\x00\x01"; 331 | sendApdu(0x00, INS_SELECT_FILE, 0x00, 0x0C, 0x02, ndef_file); 332 | receiveResponse(2 + 3); 333 | } 334 | 335 | void M24SR::updateBinary_NdefMsgLen0() { 336 | if (_verbose) 337 | Serial.print(F("\r\nupdateBinary_NdefMsgLen0")); 338 | uint8_t len0[] = "\x00\x00"; 339 | sendApdu(0x00, INS_UPDATE_BINARY, 0x00, 0x00, 0x02, len0); 340 | receiveResponse(2 + 3); 341 | } 342 | 343 | void M24SR::writeSampleMsg(uint8_t msgNo) { 344 | if (_verbose) { 345 | Serial.print(F("\r\nwriteSampleMsg ")); 346 | Serial.print(msgNo, DEC); 347 | Serial.println(""); 348 | } 349 | byte len = 0; 350 | selectFile_NDEF_App(); 351 | selectFile_NDEF_file(); 352 | updateBinary_NdefMsgLen0(); 353 | 354 | switch(msgNo) { 355 | case 0: 356 | len = 0x45; 357 | memcpy_P(&_data[0], &SAMPLE_NDEF_message1[0], len); 358 | break; 359 | case 1: 360 | len = 0x11; 361 | memcpy_P(&_data[0], &SAMPLE_NDEF_message2[0], len); 362 | break; 363 | case 2: 364 | len = 0x13; 365 | memcpy_P(&_data[0], &SAMPLE_NDEF_message3[0], len); 366 | break; 367 | default: 368 | break; 369 | } 370 | updateBinary(_data, len); 371 | receiveResponse(2 + 3); 372 | 373 | updateBinaryLen(len); 374 | receiveResponse(2 + 3); 375 | sendDESELECT(); 376 | } 377 | 378 | NdefMessage* M24SR::getNdefMessage() 379 | { 380 | unsigned int len = 0; 381 | 382 | selectFile_NDEF_App(); 383 | selectFile_NDEF_file(); 384 | //Read NDEF message length 00 B0 00 00 02 385 | uint16_t ndef_len = getNdefMessageLength(); 386 | if (_verbose) { 387 | Serial.print(F("\r\nndef_len: ")); 388 | Serial.println(ndef_len, DEC); 389 | } 390 | 391 | if (ndef_len < 255) 392 | sendApdu(0x00, INS_READ_BINARY, 0x00, 0x02, ndef_len & 0xff); 393 | else 394 | { 395 | Serial.println(F("TODO: ndef_len > 255")); 396 | return (NdefMessage*)NULL; 397 | } 398 | //uint8_t ndeflen[2]; 399 | //ndeflen[0] = ndef_len >> 8; 400 | //ndeflen[1] = ndef_len & 0xff; 401 | //sendApdu(0x00, INS_READ_BINARY, 0x00, 0x00, ndeflen); 402 | receiveResponse((_response[1] & 0xff) + 2 + 3); 403 | NdefMessage* pNdefMsg = new NdefMessage((byte *)&_response[0], ndef_len); 404 | 405 | /* TODO 406 | NdefRecord rec = pNdefMsg->getRecord(0); 407 | 408 | String txt = rec.toString(); 409 | tft.fillScreen(ST7735_BLACK); 410 | tft.setCursor(0,0); 411 | 412 | tft.setTextColor(ST7735_WHITE); 413 | char szBuf[txt.length()+1]; 414 | txt.getBytes((unsigned char*)szBuf, txt.length()+1); 415 | tft.print(szBuf); 416 | */ 417 | //delete pNdefMsg; 418 | sendDESELECT(); 419 | return pNdefMsg; 420 | } 421 | 422 | 423 | int M24SR::receiveResponse(unsigned int len) { 424 | int index=0; 425 | boolean WTX = false; 426 | boolean loop = false; 427 | if (_verbose) { 428 | Serial.print(F("\r\nreceiveResponse, len=")); 429 | Serial.print(len, DEC); 430 | Serial.println(); 431 | } 432 | if (_responseLength < len) { 433 | free(_response); 434 | if (_verbose) { 435 | Serial.print(F("\r\n_responseLength=")); 436 | Serial.print(len, DEC); 437 | } 438 | _responseLength = len; 439 | _response = (byte*)malloc(_responseLength); 440 | } 441 | else 442 | delay(1); 443 | do { 444 | WTX = false; 445 | loop = false; 446 | Wire.requestFrom(_deviceaddress, len); 447 | if (_cmds) 448 | Serial.print(F("<= ")); 449 | else 450 | delay(1); 451 | while ((Wire.available() && index < len && !WTX) || 452 | (WTX && index < len-1)) { 453 | int c = (Wire.read() & 0xff); 454 | if (_cmds) { 455 | if (c < 0x10) 456 | Serial.print(F("0")); 457 | Serial.print(c, HEX); 458 | Serial.print(F(" ")); 459 | } 460 | else 461 | delay(1); 462 | if (c == 0xF2 && index == 0) { 463 | WTX = true; 464 | } 465 | if (index >= 1) { 466 | _response[index-1] = c; 467 | } 468 | index++; 469 | } 470 | if (WTX) { 471 | Serial.print(F("\r\nWTX")); 472 | delay(200 * _response[0]); 473 | //send WTX response 474 | //sendSBLOCK(0xF2); 475 | _data[0] = 0xF2;//WTX 476 | _data[1] = _response[0]; 477 | sendCommand(/*_data,*/ 2, false); 478 | loop = true; 479 | index = 0; 480 | } 481 | }while(loop); 482 | return index; 483 | } 484 | 485 | void M24SR::writeNdefMessage(NdefMessage* pNDefMsg) 486 | { 487 | if (pNDefMsg != NULL) { 488 | pNDefMsg->print(); 489 | NdefRecord rec = pNDefMsg->getRecord(0); 490 | Serial.print(F("NDefRecord: ")); 491 | Serial.println(rec.toString()); 492 | 493 | selectFile_NDEF_App(); 494 | selectFile_NDEF_file(); 495 | updateBinary_NdefMsgLen0(); 496 | uint8_t len = pNDefMsg->getEncodedSize(); 497 | uint8_t* mem = (uint8_t*)malloc(len); 498 | //TODO memcpy(&_data[0], &SAMPLE_NDEF_message1[0], len); 499 | //uint8_t encoded[pNDefMsg->getEncodedSize()]; 500 | pNDefMsg->encode((uint8_t*)mem); 501 | 502 | updateBinary((char*)mem, len); 503 | receiveResponse(2 + 3); 504 | free(mem); 505 | 506 | updateBinaryLen(len); 507 | receiveResponse(2 + 3); 508 | sendDESELECT(); 509 | } 510 | } 511 | 512 | unsigned int M24SR::getNdefMessageLength() 513 | { 514 | sendApdu(0x00, INS_READ_BINARY, 0x00, 0x00, 0x02); 515 | receiveResponse(2 + 2 + 3); 516 | return ((_response[0] & 0xff) << 8) | (_response[1] & 0xff); 517 | } 518 | 519 | void M24SR::print() 520 | { 521 | Serial.print(F("\nM24SR GPO:")); 522 | Serial.println(_gpo_pin); 523 | } 524 | 525 | char text[4]; 526 | 527 | void M24SR::dumpHex(uint8_t* buffer, uint8_t len) 528 | { 529 | for(byte i=0; i < len; i++) { 530 | sprintf(text, "%02X \x00", (uint8_t)(*(buffer + i))); 531 | Serial.print(text); 532 | if ((i % 16) == 15) { 533 | Serial.println(""); 534 | } 535 | } 536 | } 537 | 538 | -------------------------------------------------------------------------------- /M24SR.h: -------------------------------------------------------------------------------- 1 | /* Arduino library for ST M24SR Dynamic NFC/RFID tag IC with EEPROM, NFC Forum Type 4 Tag and I2C interface 2 | (c) 2014 by ReNa http://regnerischernachmittag.wordpress.com/ 3 | */ 4 | 5 | #ifndef M24SR_h 6 | #define M24SR_h 7 | 8 | //#include 9 | #include 10 | //#include 11 | #include 12 | #include //prog_char 13 | 14 | #include 15 | #include 16 | 17 | #define CMD_GETI2CSESSION 0x26 18 | #define CMD_KILLRFSESSION 0x52 19 | 20 | /* 21 | 22 | TODO 23 | ---- 24 | - clean-up code and add TODOs 25 | - test: > 1 NDef record in NDef message 26 | - read/write data (without NDef classes) 27 | - what to do with writeSampleMsg? 28 | - ndef_len > 255 29 | - password handling 30 | - dynamic data buffer 31 | - if (len > BUFFER_LENGTH - 8) update for-loop 32 | 33 | 34 | INFO 35 | ---- 36 | 37 | NOTE: The Arduino Wire library only has a 32 character buffer, so that is the maximun we can send using Arduino. This buffer includes the two address bytes which limits our data payload to 30 bytes 38 | 39 | AN4433 Storing data into the NDEF memory of M24SR http://www.st.com/web/en/resource/technical/document/application_note/DM00105043.pdf 40 | Datasheet http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00097458.pdf 41 | 42 | */ 43 | 44 | #define INS_SELECT_FILE 0xA4 45 | #define INS_UPDATE_BINARY 0xD6 46 | #define INS_READ_BINARY 0xB0 47 | #define INS_VERIFY 0x20 48 | 49 | class M24SR 50 | { 51 | public: 52 | M24SR(); 53 | M24SR(uint8_t gpo); 54 | ~M24SR(); 55 | void print(); 56 | boolean checkGPOTrigger(); 57 | void updateBinary_NdefMsgLen0(); 58 | void writeGPO(uint8_t data); 59 | //getUID() 60 | void sendDESELECT(); 61 | NdefMessage* getNdefMessage(); 62 | unsigned int getNdefMessageLength(); 63 | void writeNdefMessage(NdefMessage* message); 64 | void selectFile_NDEF_file(); 65 | void sendSBLOCK(uint8_t sblock); 66 | void selectFile_NDEF_App(); 67 | void updateBinary(char* data, uint8_t len); 68 | void updateBinary(unsigned int offset, char* data, uint8_t len); 69 | void updateBinaryLen(int len); 70 | boolean verifyI2cPassword(); 71 | //TODO boolean verifyI2cPassword(uint8_t* pwd); 72 | //TODO boolean setI2cPassword(uint8_t* old_password, uint8_t* new_password); 73 | void checkCRC(char* data, int len); 74 | void sendApdu(uint8_t CLA, uint8_t INS, uint8_t P1, uint8_t P2, uint8_t Lc, uint8_t* Data); 75 | void sendApdu(uint8_t CLA, uint8_t INS, uint8_t P1, uint8_t P2, uint8_t Le); 76 | void sendApdu_P(uint8_t CLA, uint8_t INS, uint8_t P1, uint8_t P2, uint8_t Lc, const prog_char* Data); 77 | void sendCommand(/*char* data,*/ int len); 78 | void sendCommand(/*char* data,*/ int len, boolean setPCB); 79 | void selfTest(); 80 | 81 | void writeSampleMsg(uint8_t msgNo); 82 | void displaySystemFile(); 83 | int receiveResponse(unsigned int len); 84 | void _setup(); 85 | 86 | void dumpHex(uint8_t* buffer, uint8_t len); 87 | boolean _verbose; 88 | boolean _cmds; 89 | char _data[100]; //TODO dynamic buffer 90 | private: 91 | 92 | uint8_t _gpo_pin; 93 | uint8_t _lastGPO; 94 | uint8_t _deviceaddress; 95 | boolean _sendGetI2cSession; 96 | uint8_t _err; 97 | uint8_t _blockNo; 98 | 99 | uint8_t _responseLength; 100 | uint8_t* _response; 101 | }; 102 | 103 | #endif 104 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | ArduinoM24SR 2 | ============ 3 | 4 | Arduino library for ST M24SR NFC dynamic tag 5 | -------------------------------------------------------------------------------- /examples/DisplaySystemFile/DisplaySystemFile.ino: -------------------------------------------------------------------------------- 1 | /* Example: DisplaySystemFile (displays system properties of the NFC chip) 2 | Arduino library for ST M24SR Dynamic NFC/RFID tag IC with EEPROM, NFC Forum Type 4 Tag and I2C interface 3 | (c) 2014 by ReNa http://regnerischernachmittag.wordpress.com/ 4 | */ 5 | 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | 12 | /* 13 | 14 | How to use/install: 15 | 1. connect M24SR 16 | Pinout: 17 | ------------------------------------------------------------------------------- 18 | M24SR -> Arduino / resistor / antenna 19 | ------------------------------------------------------------------------------- 20 | 1 RF disable -> TODO not used 21 | 2 AC0 (antenna) -> Antenna 22 | 3 AC1 (antenna) -> Antenna 23 | 4 VSS (GND) -> Arduino Gnd 24 | 5 SDA (I2C data) -> Arduino A4 25 | 6 SCL (I2C clock) -> Arduino A5 26 | 7 GPO -> Arduino D7 + Pull-Up resistor (>4.7kOhm) to VCC 27 | 8 VCC (2...5V) -> Arduino 5V 28 | ------------------------------------------------------------------------------- 29 | 2. download CRC lib 30 | http://code.google.com/p/arduino/source/browse/avrdude-5.4-arduino/crc16.c 31 | http://code.google.com/p/arduino/source/browse/avrdude-5.4-arduino/crc16.h 32 | and store the two files in ~/sketchbook/libraries/crc16 33 | 34 | 3. download NDEF/PN532 Lib 35 | https://github.com/don/NDEF has no toString support !!! 36 | TODO use my patched lib 37 | */ 38 | 39 | #define gpo_pin 7 40 | M24SR m24sr(gpo_pin); 41 | 42 | //http://playground.arduino.cc/Code/AvailableMemory 43 | int freeRam () { 44 | extern int __heap_start, *__brkval; 45 | int v; 46 | return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 47 | } 48 | 49 | void setup() 50 | { 51 | Serial.begin(9600); 52 | //for debug purpose 53 | //m24sr._verbose = true; 54 | //m24sr._cmds = true; 55 | m24sr._setup(); 56 | 57 | displayFreeRAM(); 58 | m24sr.displaySystemFile(); 59 | } 60 | 61 | void loop() 62 | { 63 | } 64 | 65 | void displayFreeRAM() { 66 | Serial.print(F("free RAM: ")); 67 | Serial.println(freeRam(), DEC); 68 | } 69 | 70 | -------------------------------------------------------------------------------- /examples/NDefWrite/NDefWrite.ino: -------------------------------------------------------------------------------- 1 | /* Example: NDefWrite (1 of 3 NDEF URL Records will be written after reset - tap the tag with your NFC phone) 2 | Arduino library for ST M24SR Dynamic NFC/RFID tag IC with EEPROM, NFC Forum Type 4 Tag and I2C interface 3 | (c) 2014 by ReNa http://regnerischernachmittag.wordpress.com/ 4 | */ 5 | 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | 12 | /* 13 | 14 | How to use/install: 15 | 1. connect M24SR 16 | Pinout: 17 | ------------------------------------------------------------------------------- 18 | M24SR -> Arduino / resistor / antenna 19 | ------------------------------------------------------------------------------- 20 | 1 RF disable -> TODO not used 21 | 2 AC0 (antenna) -> Antenna 22 | 3 AC1 (antenna) -> Antenna 23 | 4 VSS (GND) -> Arduino Gnd 24 | 5 SDA (I2C data) -> Arduino A4 25 | 6 SCL (I2C clock) -> Arduino A5 26 | 7 GPO -> Arduino D7 + Pull-Up resistor (>4.7kOhm) to VCC 27 | 8 VCC (2...5V) -> Arduino 5V 28 | ------------------------------------------------------------------------------- 29 | 2. download CRC lib 30 | http://code.google.com/p/arduino/source/browse/avrdude-5.4-arduino/crc16.c 31 | http://code.google.com/p/arduino/source/browse/avrdude-5.4-arduino/crc16.h 32 | and store the two files in ~/sketchbook/libraries/crc16 33 | 34 | 3. download NDEF/PN532 Lib 35 | https://github.com/don/NDEF has no toString support !!! 36 | TODO use my patched lib 37 | */ 38 | 39 | #define gpo_pin 7 40 | M24SR m24sr(gpo_pin); 41 | 42 | //http://playground.arduino.cc/Code/AvailableMemory 43 | int freeRam () { 44 | extern int __heap_start, *__brkval; 45 | int v; 46 | return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 47 | } 48 | 49 | prog_char URI1[] PROGMEM = "http://regnerischernachmittag.wordpress.com/?writesample"; 50 | prog_char URI2[] PROGMEM = "https://github.com/rena2019/ArduinoM24SR"; 51 | prog_char URI3[] PROGMEM = "https://twitter.com/regnerischerTag"; 52 | 53 | void setup() 54 | { 55 | Serial.begin(9600); 56 | randomSeed(analogRead(0)); 57 | //for debug purpose 58 | //m24sr._verbose = true; 59 | //m24sr._cmds = true; 60 | m24sr._setup(); 61 | displayFreeRAM(); 62 | NdefMessage message = NdefMessage(); 63 | switch (random(3)) { 64 | case 0: message.addUriRecord(&URI1[0]); 65 | break; 66 | case 1: message.addUriRecord(&URI2[0]); 67 | break; 68 | default: message.addUriRecord(&URI3[0]); 69 | break; 70 | } 71 | 72 | displayFreeRAM(); 73 | m24sr.writeNdefMessage(&message); 74 | Serial.print(F("\r\nUse NFC phone/reader to read out NFC tag content!")); 75 | } 76 | 77 | void loop() 78 | { 79 | } 80 | 81 | void displayFreeRAM() { 82 | Serial.print(F("\r\nfree RAM: ")); 83 | Serial.println(freeRam(), DEC); 84 | } 85 | 86 | -------------------------------------------------------------------------------- /examples/NfcTagDisplay/NfcTagDisplay.ino: -------------------------------------------------------------------------------- 1 | /* Example: NfcTagDisplay (Displays the content of the EEPROM after changing the NDef record with a NFC phone/Smartcard reader) 2 | Arduino library for ST M24SR Dynamic NFC/RFID tag IC with EEPROM, NFC Forum Type 4 Tag and I2C interface 3 | (c) 2014 by ReNa http://regnerischernachmittag.wordpress.com/ 4 | */ 5 | 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | 12 | /* 13 | 14 | How to use/install: 15 | 1. connect M24SR 16 | Pinout: 17 | ------------------------------------------------------------------------------- 18 | M24SR -> Arduino / resistor / antenna 19 | ------------------------------------------------------------------------------- 20 | 1 RF disable -> TODO not used 21 | 2 AC0 (antenna) -> Antenna 22 | 3 AC1 (antenna) -> Antenna 23 | 4 VSS (GND) -> Arduino Gnd 24 | 5 SDA (I2C data) -> Arduino A4 25 | 6 SCL (I2C clock) -> Arduino A5 26 | 7 GPO -> Arduino D7 + Pull-Up resistor (>4.7kOhm) to VCC 27 | 8 VCC (2...5V) -> Arduino 5V 28 | ------------------------------------------------------------------------------- 29 | 2. download CRC lib 30 | http://code.google.com/p/arduino/source/browse/avrdude-5.4-arduino/crc16.c 31 | http://code.google.com/p/arduino/source/browse/avrdude-5.4-arduino/crc16.h 32 | and store the two files in ~/sketchbook/libraries/crc16 33 | 34 | 3. download NDEF/PN532 Lib 35 | https://github.com/don/NDEF has no toString support !!! 36 | TODO use my patched lib 37 | 38 | *optional* (if you want to connect a TFT and display the NDEF record on it): 39 | 4. download Adafruit_GFX lib 40 | https://github.com/adafruit/Adafruit-GFX-Library 41 | and store files under ~/sketchbook/libraries 42 | 43 | download Adafruit_ST7735 lib 44 | https://github.com/adafruit/Adafruit-ST7735-Library 45 | and store files under ~/sketchbook/libraries 46 | 47 | 5. connect TFT 48 | Arduino TFT 49 | --------------------- 50 | 5V (VCC) LED, VCC 51 | GND GND 52 | D13 (SCK) SCK 53 | D11 (MOSI) SDA 54 | D10 (SS) CS 55 | D9 A0 56 | D8 RESET 57 | */ 58 | 59 | // next 5 lines are required (due to Arduino bug) if _TFT_SUPPORT_ is undefined 60 | // BOF preprocessor bug prevent - insert me on top of your arduino-code 61 | // From: http://www.a-control.de/arduino-fehler/?lang=en 62 | #if 1 63 | __asm volatile ("nop"); 64 | #endif 65 | 66 | //uncomment next line if you have a TFT connected to your arduino 67 | //#define _TFT_SUPPORT_ 68 | 69 | #ifdef _TFT_SUPPORT_ 70 | #include // Adafruit graphic-lib 71 | #include // Adafruit ST7735-lib 72 | #include 73 | // Arduino 5V (VCC) to TFT: LED, VCC 74 | // Arduino GND to TFT: GND 75 | // Arduino D13 (SCK) to TFT: SCK 76 | // Arduino D11 (MOSI) to TFT: 77 | #define cs 10 // Arduino D10 (SS) to TFT: CS 78 | #define dc 9 // Arduino D9 to TFT: A0 79 | #define rst 8 // Arduino-D8 to TFT: RESET 80 | Adafruit_ST7735 tft = Adafruit_ST7735(cs, dc, rst); 81 | #endif 82 | 83 | #define gpo_pin 7 84 | M24SR m24sr(gpo_pin); 85 | 86 | //http://playground.arduino.cc/Code/AvailableMemory 87 | int freeRam () { 88 | extern int __heap_start, *__brkval; 89 | int v; 90 | return (int) &v - (__brkval == 0 ? (int) &__heap_start : (int) __brkval); 91 | } 92 | 93 | void setup() 94 | { 95 | Serial.begin(9600); 96 | //for debug purpose 97 | //m24sr._verbose = true; 98 | //m24sr._cmds = true; 99 | m24sr._setup(); 100 | 101 | #ifdef _TFT_SUPPORT_ 102 | tft.initR(INITR_BLACKTAB); // ST7735-Chip initialize 103 | tft.setTextColor(ST7735_WHITE); 104 | tft.setTextSize(1); 105 | tft.setTextWrap(true); 106 | tft.fillScreen(ST7735_BLACK); 107 | #endif 108 | 109 | displayFreeRAM(); 110 | m24sr.displaySystemFile(); 111 | #ifdef _TFT_SUPPORT_ 112 | Serial.println(F("\r\nwith TFT")); 113 | #else 114 | Serial.println(F("\r\nwithout TFT")); 115 | #endif 116 | Serial.print(F("Write/change NFC tag (with your NFC phone) now!")); 117 | } 118 | 119 | void loop() 120 | { 121 | if (m24sr.checkGPOTrigger()) { 122 | displayNDefRecord(); 123 | } 124 | delay(200); 125 | } 126 | 127 | void displayNDefRecord() { 128 | //read NDef message from memory 129 | NdefMessage* pNDefMsg = m24sr.getNdefMessage(); 130 | displayFreeRAM(); 131 | if (pNDefMsg != NULL) { 132 | pNDefMsg->print(); 133 | NdefRecord rec = pNDefMsg->getRecord(0); 134 | String txt = rec.toString(); 135 | Serial.print(F("NDefRecord: ")); 136 | Serial.println(txt); 137 | 138 | #ifdef _TFT_SUPPORT_ 139 | //display text on TFT 140 | tft.fillScreen(ST7735_BLACK); 141 | tft.setCursor(0,0); 142 | tft.setTextColor(ST7735_WHITE); 143 | char szBuf[txt.length()+1]; 144 | txt.getBytes((unsigned char*)szBuf, txt.length()+1); 145 | tft.print(szBuf); 146 | #endif 147 | delete pNDefMsg; 148 | } 149 | } 150 | 151 | void displayFreeRAM() { 152 | Serial.print(F("\r\nfree RAM: ")); 153 | Serial.println(freeRam(), DEC); 154 | } 155 | 156 | --------------------------------------------------------------------------------