120 lines
4.2 KiB
C++
120 lines
4.2 KiB
C++
/**************************************************************************/
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/*!
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@file readMifareClassic.pde
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@author Adafruit Industries
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@license BSD (see license.txt)
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This example will wait for any ISO14443A card or tag, and
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depending on the size of the UID will attempt to read from it.
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If the card has a 4-byte UID it is probably a Mifare
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Classic card, and the following steps are taken:
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Reads the 4 byte (32 bit) ID of a MiFare Classic card.
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Since the classic cards have only 32 bit identifiers you can stick
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them in a single variable and use that to compare card ID's as a
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number. This doesn't work for ultralight cards that have longer 7
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byte IDs!
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Note that you need the baud rate to be 115200 because we need to
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print out the data and read from the card at the same time!
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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 breakout
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----> https://www.adafruit.com/products/364
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Check out the links above for our tutorials and wiring diagrams
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These chips use SPI to communicate, 4 required to interface
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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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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("Hello!");
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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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Serial.println("Waiting for an ISO14443A Card ...");
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}
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void loop(void) {
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uint8_t success;
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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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// Wait for an ISO14443A type cards (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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// 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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if (uidLength == 4)
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{
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// We probably have a Mifare Classic card ...
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uint32_t cardid = uid[0];
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cardid <<= 8;
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cardid |= uid[1];
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cardid <<= 8;
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cardid |= uid[2];
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cardid <<= 8;
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cardid |= uid[3];
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Serial.print("Seems to be a Mifare Classic card #");
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Serial.println(cardid);
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}
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Serial.println("");
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}
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}
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