178 lines
6.3 KiB
C++
178 lines
6.3 KiB
C++
/**************************************************************************/
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/*!
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@file mifareclassic_updatendef.pde
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@author Adafruit Industries
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@license BSD (see license.txt)
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Updates a sector that is already formatted for NDEF (using
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mifareclassic_formatndef.pde for example), inserting a new url
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This is an example sketch for the Adafruit PN532 NFC/RFID breakout boards
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This library works with the Adafruit NFC Shield
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----> https://www.adafruit.com/products/789
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Check out the links above for our tutorials and wiring diagrams
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These chips use SPI or I2C to communicate
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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*/
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/**************************************************************************/
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#include <Wire.h>
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#include <SPI.h>
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#include <Adafruit_PN532.h>
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// If using the breakout with SPI, define the pins for SPI communication.
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#define PN532_SCK (2)
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#define PN532_MOSI (3)
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#define PN532_SS (4)
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#define PN532_MISO (5)
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// If using the breakout or shield with I2C, define just the pins connected
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// to the IRQ and reset lines. Use the values below (2, 3) for the shield!
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#define PN532_IRQ (2)
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#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
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// is connected to the Arduino:
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// Use this line for a breakout with a SPI connection:
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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
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// the PN532 SCK, MOSI, and MISO pins need to be connected to the Arduino's
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// hardware SPI SCK, MOSI, and MISO pins. On an Arduino Uno these are
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// SCK = 13, MOSI = 11, MISO = 12. The SS line can be any digital IO pin.
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//Adafruit_PN532 nfc(PN532_SS);
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// Or use this line for a breakout or shield with an I2C connection:
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//Adafruit_PN532 nfc(PN532_IRQ, PN532_RESET);
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/*
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We can encode many different kinds of pointers to the card,
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from a URL, to an Email address, to a phone number, and many more
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check the library header .h file to see the large # of supported
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prefixes!
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*/
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// For a http://www. url:
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const char * url = "adafruit.com/blog/";
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uint8_t ndefprefix = NDEF_URIPREFIX_HTTP_WWWDOT;
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// for an email address
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//const char * url = "mail@example.com";
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//uint8_t ndefprefix = NDEF_URIPREFIX_MAILTO;
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// for a phone number
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//const char * url = "+1 212 555 1212";
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//uint8_t ndefprefix = NDEF_URIPREFIX_TEL;
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void setup(void) {
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Serial.begin(115200);
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while (!Serial) delay(10); // for Leonardo/Micro/Zero
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Serial.println("Looking for PN532...");
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nfc.begin();
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uint32_t versiondata = nfc.getFirmwareVersion();
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if (! versiondata) {
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Serial.print("Didn't find PN53x board");
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while (1); // halt
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}
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// Got ok data, print it out!
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Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
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Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
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Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
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}
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void loop(void) {
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uint8_t success; // Flag to check if there was an error with the PN532
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uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
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uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
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// Use the default NDEF keys (these would have have set by mifareclassic_formatndef.pde!)
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uint8_t keyb[6] = { 0xD3, 0xF7, 0xD3, 0xF7, 0xD3, 0xF7 };
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Serial.println("Place your NDEF formatted Mifare Classic card on the reader to update the");
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Serial.println("NDEF record and press any key to continue ...");
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// Wait for user input before proceeding
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while (!Serial.available());
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// a key was pressed1
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while (Serial.available()) Serial.read();
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// Wait for an ISO14443A type card (Mifare, etc.). When one is found
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// 'uid' will be populated with the UID, and uidLength will indicate
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// if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
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success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
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if (success)
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{
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// Display some basic information about the card
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Serial.println("Found an ISO14443A card");
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Serial.print(" UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
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Serial.print(" UID Value: ");
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nfc.PrintHex(uid, uidLength);
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Serial.println("");
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// Make sure this is a Mifare Classic card
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if (uidLength != 4)
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{
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Serial.println("Ooops ... this doesn't seem to be a Mifare Classic card!");
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return;
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}
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// We probably have a Mifare Classic card ...
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Serial.println("Seems to be a Mifare Classic card (4 byte UID)");
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// Check if this is an NDEF card (using first block of sector 1 from mifareclassic_formatndef.pde)
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// Must authenticate on the first key using 0xD3 0xF7 0xD3 0xF7 0xD3 0xF7
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success = nfc.mifareclassic_AuthenticateBlock (uid, uidLength, 4, 0, keyb);
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if (!success)
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{
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Serial.println("Unable to authenticate block 4 ... is this card NDEF formatted?");
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return;
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}
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Serial.println("Authentication succeeded (seems to be an NDEF/NFC Forum tag) ...");
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// Authenticated seems to have worked
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// Try to write an NDEF record to sector 1
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// Use 0x01 for the URI Identifier Code to prepend "http://www."
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// to the url (and save some space). For information on URI ID Codes
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// see http://www.ladyada.net/wiki/private/articlestaging/nfc/ndef
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if (strlen(url) > 38)
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{
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// The length is also checked in the WriteNDEFURI function, but lets
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// warn users here just in case they change the value and it's bigger
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// than it should be
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Serial.println("URI is too long ... must be less than 38 characters!");
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return;
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}
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Serial.println("Updating sector 1 with URI as NDEF Message");
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// URI is within size limits ... write it to the card and report success/failure
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success = nfc.mifareclassic_WriteNDEFURI(1, ndefprefix, url);
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if (success)
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{
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Serial.println("NDEF URI Record written to sector 1");
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Serial.println("");
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}
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else
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{
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Serial.println("NDEF Record creation failed! :(");
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}
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}
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// Wait a bit before trying again
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Serial.println("\n\nDone!");
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delay(1000);
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Serial.flush();
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while(Serial.available()) Serial.read();
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}
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