PN532 Driver library This library provides an abstract API to drive the pn532 nfc chip, with I2C/HSU/SPI interface. Its based on the Seeed Studio's Arduino version.
Dependents: PN532_ReadUid Nfctest2
PN532/examples/mifareclassic_ndeftoclassic/mifareclassic_ndeftoclassic.pde
- Committer:
- dotnfc
- Date:
- 2016-09-13
- Revision:
- 0:db8030e71f55
File content as of revision 0:db8030e71f55:
/**************************************************************************/ /*! This examples attempts to take a Mifare Classic 1K card that has been formatted for NDEF messages using mifareclassic_formatndef, and resets the authentication keys back to the Mifare Classic defaults To enable debug message, define DEBUG in PN532/PN532_debug.h */ /**************************************************************************/ #include <SPI.h> #include <PN532_SPI.h> #include "PN532.h" PN532_SPI pn532spi(SPI, 10); PN532 nfc(pn532spi); #define NR_SHORTSECTOR (32) // Number of short sectors on Mifare 1K/4K #define NR_LONGSECTOR (8) // Number of long sectors on Mifare 4K #define NR_BLOCK_OF_SHORTSECTOR (4) // Number of blocks in a short sector #define NR_BLOCK_OF_LONGSECTOR (16) // Number of blocks in a long sector // Determine the sector trailer block based on sector number #define BLOCK_NUMBER_OF_SECTOR_TRAILER(sector) (((sector)<NR_SHORTSECTOR)? \ ((sector)*NR_BLOCK_OF_SHORTSECTOR + NR_BLOCK_OF_SHORTSECTOR-1):\ (NR_SHORTSECTOR*NR_BLOCK_OF_SHORTSECTOR + (sector-NR_SHORTSECTOR)*NR_BLOCK_OF_LONGSECTOR + NR_BLOCK_OF_LONGSECTOR-1)) // Determine the sector's first block based on the sector number #define BLOCK_NUMBER_OF_SECTOR_1ST_BLOCK(sector) (((sector)<NR_SHORTSECTOR)? \ ((sector)*NR_BLOCK_OF_SHORTSECTOR):\ (NR_SHORTSECTOR*NR_BLOCK_OF_SHORTSECTOR + (sector-NR_SHORTSECTOR)*NR_BLOCK_OF_LONGSECTOR)) // The default Mifare Classic key static const uint8_t KEY_DEFAULT_KEYAB[6] = {0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}; void setup(void) { Serial.begin(115200); Serial.println("Looking for PN532..."); nfc.begin(); 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; // Flag to check if there was an error with the PN532 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) bool authenticated = false; // Flag to indicate if the sector is authenticated uint8_t blockBuffer[16]; // Buffer to store block contents uint8_t blankAccessBits[3] = { 0xff, 0x07, 0x80 }; uint8_t idx = 0; uint8_t numOfSector = 16; // Assume Mifare Classic 1K for now (16 4-block sectors) Serial.println("Place your NDEF formatted Mifare Classic 1K card on the reader"); Serial.println("and press any key to continue ..."); // Wait for user input before proceeding while (!Serial.available()); while (Serial.available()) Serial.read(); // Wait for an ISO14443A type card (Mifare, etc.). When one is found // 'uid' will be populated with the UID, and uidLength will indicate // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight) success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength); if (success) { // We seem to have a tag ... // Display some basic information about it Serial.println("Found an ISO14443A card/tag"); Serial.print(" UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes"); Serial.print(" UID Value: "); nfc.PrintHex(uid, uidLength); Serial.println(""); // Make sure this is a Mifare Classic card if (uidLength != 4) { Serial.println("Ooops ... this doesn't seem to be a Mifare Classic card!"); return; } Serial.println("Seems to be a Mifare Classic card (4 byte UID)"); Serial.println(""); Serial.println("Reformatting card for Mifare Classic (please don't touch it!) ... "); // Now run through the card sector by sector for (idx = 0; idx < numOfSector; idx++) { // Step 1: Authenticate the current sector using key B 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF success = nfc.mifareclassic_AuthenticateBlock (uid, uidLength, BLOCK_NUMBER_OF_SECTOR_TRAILER(idx), 1, (uint8_t *)KEY_DEFAULT_KEYAB); if (!success) { Serial.print("Authentication failed for sector "); Serial.println(numOfSector); return; } // Step 2: Write to the other blocks if (idx == 16) { memset(blockBuffer, 0, sizeof(blockBuffer)); if (!(nfc.mifareclassic_WriteDataBlock((BLOCK_NUMBER_OF_SECTOR_TRAILER(idx)) - 3, blockBuffer))) { Serial.print("Unable to write to sector "); Serial.println(numOfSector); return; } } if ((idx == 0) || (idx == 16)) { memset(blockBuffer, 0, sizeof(blockBuffer)); if (!(nfc.mifareclassic_WriteDataBlock((BLOCK_NUMBER_OF_SECTOR_TRAILER(idx)) - 2, blockBuffer))) { Serial.print("Unable to write to sector "); Serial.println(numOfSector); return; } } else { memset(blockBuffer, 0, sizeof(blockBuffer)); if (!(nfc.mifareclassic_WriteDataBlock((BLOCK_NUMBER_OF_SECTOR_TRAILER(idx)) - 3, blockBuffer))) { Serial.print("Unable to write to sector "); Serial.println(numOfSector); return; } if (!(nfc.mifareclassic_WriteDataBlock((BLOCK_NUMBER_OF_SECTOR_TRAILER(idx)) - 2, blockBuffer))) { Serial.print("Unable to write to sector "); Serial.println(numOfSector); return; } } memset(blockBuffer, 0, sizeof(blockBuffer)); if (!(nfc.mifareclassic_WriteDataBlock((BLOCK_NUMBER_OF_SECTOR_TRAILER(idx)) - 1, blockBuffer))) { Serial.print("Unable to write to sector "); Serial.println(numOfSector); return; } // Step 3: Reset both keys to 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF memcpy(blockBuffer, KEY_DEFAULT_KEYAB, sizeof(KEY_DEFAULT_KEYAB)); memcpy(blockBuffer + 6, blankAccessBits, sizeof(blankAccessBits)); blockBuffer[9] = 0x69; memcpy(blockBuffer + 10, KEY_DEFAULT_KEYAB, sizeof(KEY_DEFAULT_KEYAB)); // Step 4: Write the trailer block if (!(nfc.mifareclassic_WriteDataBlock((BLOCK_NUMBER_OF_SECTOR_TRAILER(idx)), blockBuffer))) { Serial.print("Unable to write trailer block of sector "); Serial.println(numOfSector); return; } } } // Wait a bit before trying again Serial.println("\n\nDone!"); delay(1000); Serial.flush(); while(Serial.available()) Serial.read(); }