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Added preliminary NTAG2xx NDEF example
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Kevin Townsend
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| /**************************************************************************/ | ||
| /*! | ||
| @file ntag2xx_updatendef.pde | ||
| @author KTOWN (Adafruit Industries) | ||
| @license BSD (see license.txt) | ||
| This example will wait for any NTAG203 or NTAG213 card or tag, | ||
| and will attempt to add or update an NDEF URI at the start of the | ||
| tag's memory. | ||
| This is an example sketch for the Adafruit PN532 NFC/RFID breakout boards | ||
| This library works with the Adafruit NFC breakout | ||
| ----> https://www.adafruit.com/products/364 | ||
| Check out the links above for our tutorials and wiring diagrams | ||
| These chips use SPI or I2C to communicate. | ||
| Adafruit invests time and resources providing this open source code, | ||
| please support Adafruit and open-source hardware by purchasing | ||
| products from Adafruit! | ||
| */ | ||
| /**************************************************************************/ | ||
| #include <Wire.h> | ||
| #include <SPI.h> | ||
| #include <Adafruit_PN532.h> | ||
|
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||
| // If using the breakout with SPI, define the pins for SPI communication. | ||
| #define PN532_SCK (2) | ||
| #define PN532_MOSI (3) | ||
| #define PN532_SS (4) | ||
| #define PN532_MISO (5) | ||
|
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||
| // If using the breakout or shield with I2C, define just the pins connected | ||
| // to the IRQ and reset lines. Use the values below (2, 3) for the shield! | ||
| #define PN532_IRQ (2) | ||
| #define PN532_RESET (3) // Not connected by default on the NFC Shield | ||
|
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||
| // Uncomment just _one_ line below depending on how your breakout or shield | ||
| // is connected to the Arduino: | ||
|
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||
| // Use this line for a breakout with a software SPI connection (recommended): | ||
| Adafruit_PN532 nfc(PN532_SCK, PN532_MISO, PN532_MOSI, PN532_SS); | ||
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||
| // Use this line for a breakout with a hardware SPI connection. Note that | ||
| // the PN532 SCK, MOSI, and MISO pins need to be connected to the Arduino's | ||
| // hardware SPI SCK, MOSI, and MISO pins. On an Arduino Uno these are | ||
| // SCK = 13, MOSI = 11, MISO = 12. The SS line can be any digital IO pin. | ||
| //Adafruit_PN532 nfc(PN532_SS); | ||
|
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||
| // Or use this line for a breakout or shield with an I2C connection: | ||
| //Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET); | ||
|
|
||
| /* | ||
| We can encode many different kinds of pointers to the card, | ||
| from a URL, to an Email address, to a phone number, and many more | ||
| check the library header .h file to see the large # of supported | ||
| prefixes! | ||
| */ | ||
| // For a http://www. url: | ||
| char * url = "adafruit.com/blog/"; | ||
| uint8_t ndefprefix = NDEF_URIPREFIX_HTTP_WWWDOT; | ||
|
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||
| // for an email address | ||
| //char * url = "[email protected]"; | ||
| //uint8_t ndefprefix = NDEF_URIPREFIX_MAILTO; | ||
|
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||
| // for a phone number | ||
| //char * url = "+1 212 555 1212"; | ||
| //uint8_t ndefprefix = NDEF_URIPREFIX_TEL; | ||
|
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||
| void setup(void) { | ||
| Serial.begin(115200); | ||
| Serial.println("Hello!"); | ||
|
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| nfc.begin(); | ||
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||
| uint32_t versiondata = nfc.getFirmwareVersion(); | ||
| if (! versiondata) { | ||
| Serial.print("Didn't find PN53x board"); | ||
| while (1); // halt | ||
| } | ||
| // Got ok data, print it out! | ||
| Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX); | ||
| Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC); | ||
| Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC); | ||
|
|
||
| // configure board to read RFID tags | ||
| nfc.SAMConfig(); | ||
| } | ||
|
|
||
| void loop(void) | ||
| { | ||
| uint8_t success; | ||
| uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID | ||
| uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type) | ||
| uint8_t dataLength; | ||
|
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||
| // Require some user feedback before running this example! | ||
| Serial.println("\r\nPlace your NDEF formatted NTAG2xx tag on the reader to update the"); | ||
| Serial.println("NDEF record and press any key to continue ...\r\n"); | ||
| // Wait for user input before proceeding | ||
| while (!Serial.available()); | ||
| // a key was pressed1 | ||
| while (Serial.available()) Serial.read(); | ||
|
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||
| // 1.) Wait for an NTAG203 card. When one is found 'uid' will be populated with | ||
| // the UID, and uidLength will indicate the size of the UID (normally 7) | ||
| success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength); | ||
|
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||
| // It seems we found a valid ISO14443A Tag! | ||
| if (success) | ||
| { | ||
| // 2.) Display some basic information about the card | ||
| Serial.println("Found an ISO14443A card"); | ||
| Serial.print(" UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes"); | ||
| Serial.print(" UID Value: "); | ||
| nfc.PrintHex(uid, uidLength); | ||
| Serial.println(""); | ||
|
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||
| if (uidLength != 7) | ||
| { | ||
| Serial.println("This doesn't seem to be an NTAG203 tag (UUID length != 7 bytes)!"); | ||
| } | ||
| else | ||
| { | ||
| uint8_t data[32]; | ||
|
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||
| // We probably have an NTAG2xx card (though it could be Ultralight as well) | ||
| Serial.println("Seems to be an NTAG2xx tag (7 byte UID)"); | ||
|
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||
| // NTAG2x3 cards have 39*4 bytes of user pages (156 user bytes), | ||
| // starting at page 4 ... larger cards just add pages to the end of | ||
| // this range: | ||
|
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||
| // See: http://www.nxp.com/documents/short_data_sheet/NTAG203_SDS.pdf | ||
|
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||
| // TAG Type PAGES USER START USER STOP | ||
| // -------- ----- ---------- --------- | ||
| // NTAG 203 42 4 39 | ||
| // NTAG 213 45 4 39 | ||
| // NTAG 215 135 4 129 | ||
| // NTAG 216 231 4 225 | ||
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| // 3.) Check if the NDEF Capability Container (CC) bits are already set | ||
| // in OTP memory (page 3) | ||
| memset(data, 0, 4); | ||
| success = nfc.ntag2xx_ReadPage(3, data); | ||
| if (!success) | ||
| { | ||
| Serial.println("Unable to read the Capability Container (page 3)"); | ||
| return; | ||
| } | ||
| else | ||
| { | ||
| // If the tag has already been formatted as NDEF, byte 0 should be: | ||
| // Byte 0 = Magic Number (0xE1) | ||
| // Byte 1 = NDEF Version (Should be 0x10) | ||
| // Byte 2 = Data Area Size (value * 8 bytes) | ||
| // Byte 3 = Read/Write Access (0x00 for full read and write) | ||
| if (!((data[0] == 0xE1) && (data[1] == 0x10))) | ||
| { | ||
| Serial.println("This doesn't seem to be an NDEF formatted tag."); | ||
| Serial.println("Page 3 should start with 0xE1 0x10."); | ||
| } | ||
| else | ||
| { | ||
| // 4.) Determine and display the data area size | ||
| dataLength = data[2]*8; | ||
| Serial.print("Tag is NDEF formatted. Data area size = "); | ||
| Serial.print(dataLength); | ||
| Serial.println(" bytes"); | ||
|
|
||
| // 5.) Erase the old data area | ||
| Serial.print("Erasing previous data area "); | ||
| for (uint8_t i = 4; i < (dataLength/4)+4; i++) | ||
| { | ||
| memset(data, 0, 4); | ||
| success = nfc.ntag2xx_WritePage(i, data); | ||
| Serial.print("."); | ||
| if (!success) | ||
| { | ||
| Serial.println(" ERROR!"); | ||
| return; | ||
| } | ||
| } | ||
| Serial.println(" DONE!"); | ||
|
|
||
| // 6.) Try to add a new NDEF URI record | ||
| Serial.print("Writing URI as NDEF Record ... "); | ||
| success = nfc.ntag2xx_WriteNDEFURI(ndefprefix, url, dataLength); | ||
| if (success) | ||
| { | ||
| Serial.println("DONE!"); | ||
| } | ||
| else | ||
| { | ||
| Serial.println("ERROR! (URI length?)"); | ||
| } | ||
|
|
||
| } // CC contents NDEF record check | ||
| } // CC page read check | ||
| } // UUID length check | ||
|
|
||
| // Wait a bit before trying again | ||
| Serial.flush(); | ||
| while (!Serial.available()); | ||
| while (Serial.available()) { | ||
| Serial.read(); | ||
| } | ||
| Serial.flush(); | ||
| } // Start waiting for a new ISO14443A tag | ||
| } |