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
Diff: PN532/examples/mifareclassic_ndeftoclassic/mifareclassic_ndeftoclassic.pde
- Revision:
- 0:db8030e71f55
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/PN532/examples/mifareclassic_ndeftoclassic/mifareclassic_ndeftoclassic.pde Tue Sep 13 06:01:19 2016 +0000 @@ -0,0 +1,172 @@ +/**************************************************************************/ +/*! + 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(); +} \ No newline at end of file