dotnfc Tang / LibPN532

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_memdump/mifareclassic_memdump.pde@0:db8030e71f55, 2016-09-13 (annotated)

Committer:
dotnfc
Date:
Tue Sep 13 06:01:19 2016 +0000
Revision:
0:db8030e71f55
first commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dotnfc 0:db8030e71f55 1 /**************************************************************************/
dotnfc 0:db8030e71f55 2 /*!
dotnfc 0:db8030e71f55 3 This example attempts to dump the contents of a Mifare Classic 1K card
dotnfc 0:db8030e71f55 4
dotnfc 0:db8030e71f55 5 Note that you need the baud rate to be 115200 because we need to print
dotnfc 0:db8030e71f55 6 out the data and read from the card at the same time!
dotnfc 0:db8030e71f55 7
dotnfc 0:db8030e71f55 8 To enable debug message, define DEBUG in PN532/PN532_debug.h
dotnfc 0:db8030e71f55 9 */
dotnfc 0:db8030e71f55 10 /**************************************************************************/
dotnfc 0:db8030e71f55 11
dotnfc 0:db8030e71f55 12 #include <SPI.h>
dotnfc 0:db8030e71f55 13 #include <PN532_SPI.h>
dotnfc 0:db8030e71f55 14 #include "PN532.h"
dotnfc 0:db8030e71f55 15
dotnfc 0:db8030e71f55 16 PN532_SPI pn532spi(SPI, 10);
dotnfc 0:db8030e71f55 17 PN532 nfc(pn532spi);
dotnfc 0:db8030e71f55 18
dotnfc 0:db8030e71f55 19 void setup(void) {
dotnfc 0:db8030e71f55 20 // has to be fast to dump the entire memory contents!
dotnfc 0:db8030e71f55 21 Serial.begin(115200);
dotnfc 0:db8030e71f55 22 Serial.println("Looking for PN532...");
dotnfc 0:db8030e71f55 23
dotnfc 0:db8030e71f55 24 nfc.begin();
dotnfc 0:db8030e71f55 25
dotnfc 0:db8030e71f55 26 uint32_t versiondata = nfc.getFirmwareVersion();
dotnfc 0:db8030e71f55 27 if (! versiondata) {
dotnfc 0:db8030e71f55 28 Serial.print("Didn't find PN53x board");
dotnfc 0:db8030e71f55 29 while (1); // halt
dotnfc 0:db8030e71f55 30 }
dotnfc 0:db8030e71f55 31 // Got ok data, print it out!
dotnfc 0:db8030e71f55 32 Serial.print("Found chip PN5"); Serial.println((versiondata>>24) & 0xFF, HEX);
dotnfc 0:db8030e71f55 33 Serial.print("Firmware ver. "); Serial.print((versiondata>>16) & 0xFF, DEC);
dotnfc 0:db8030e71f55 34 Serial.print('.'); Serial.println((versiondata>>8) & 0xFF, DEC);
dotnfc 0:db8030e71f55 35
dotnfc 0:db8030e71f55 36 // configure board to read RFID tags
dotnfc 0:db8030e71f55 37 nfc.SAMConfig();
dotnfc 0:db8030e71f55 38
dotnfc 0:db8030e71f55 39 Serial.println("Waiting for an ISO14443A Card ...");
dotnfc 0:db8030e71f55 40 }
dotnfc 0:db8030e71f55 41
dotnfc 0:db8030e71f55 42
dotnfc 0:db8030e71f55 43 void loop(void) {
dotnfc 0:db8030e71f55 44 uint8_t success; // Flag to check if there was an error with the PN532
dotnfc 0:db8030e71f55 45 uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 }; // Buffer to store the returned UID
dotnfc 0:db8030e71f55 46 uint8_t uidLength; // Length of the UID (4 or 7 bytes depending on ISO14443A card type)
dotnfc 0:db8030e71f55 47 uint8_t currentblock; // Counter to keep track of which block we're on
dotnfc 0:db8030e71f55 48 bool authenticated = false; // Flag to indicate if the sector is authenticated
dotnfc 0:db8030e71f55 49 uint8_t data[16]; // Array to store block data during reads
dotnfc 0:db8030e71f55 50
dotnfc 0:db8030e71f55 51 // Keyb on NDEF and Mifare Classic should be the same
dotnfc 0:db8030e71f55 52 uint8_t keyuniversal[6] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
dotnfc 0:db8030e71f55 53
dotnfc 0:db8030e71f55 54 // Wait for an ISO14443A type cards (Mifare, etc.). When one is found
dotnfc 0:db8030e71f55 55 // 'uid' will be populated with the UID, and uidLength will indicate
dotnfc 0:db8030e71f55 56 // if the uid is 4 bytes (Mifare Classic) or 7 bytes (Mifare Ultralight)
dotnfc 0:db8030e71f55 57 success = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength);
dotnfc 0:db8030e71f55 58
dotnfc 0:db8030e71f55 59 if (success) {
dotnfc 0:db8030e71f55 60 // Display some basic information about the card
dotnfc 0:db8030e71f55 61 Serial.println("Found an ISO14443A card");
dotnfc 0:db8030e71f55 62 Serial.print(" UID Length: ");Serial.print(uidLength, DEC);Serial.println(" bytes");
dotnfc 0:db8030e71f55 63 Serial.print(" UID Value: ");
dotnfc 0:db8030e71f55 64 for (uint8_t i = 0; i < uidLength; i++) {
dotnfc 0:db8030e71f55 65 Serial.print(uid[i], HEX);
dotnfc 0:db8030e71f55 66 Serial.print(' ');
dotnfc 0:db8030e71f55 67 }
dotnfc 0:db8030e71f55 68 Serial.println("");
dotnfc 0:db8030e71f55 69
dotnfc 0:db8030e71f55 70 if (uidLength == 4)
dotnfc 0:db8030e71f55 71 {
dotnfc 0:db8030e71f55 72 // We probably have a Mifare Classic card ...
dotnfc 0:db8030e71f55 73 Serial.println("Seems to be a Mifare Classic card (4 byte UID)");
dotnfc 0:db8030e71f55 74
dotnfc 0:db8030e71f55 75 // Now we try to go through all 16 sectors (each having 4 blocks)
dotnfc 0:db8030e71f55 76 // authenticating each sector, and then dumping the blocks
dotnfc 0:db8030e71f55 77 for (currentblock = 0; currentblock < 64; currentblock++)
dotnfc 0:db8030e71f55 78 {
dotnfc 0:db8030e71f55 79 // Check if this is a new block so that we can reauthenticate
dotnfc 0:db8030e71f55 80 if (nfc.mifareclassic_IsFirstBlock(currentblock)) authenticated = false;
dotnfc 0:db8030e71f55 81
dotnfc 0:db8030e71f55 82 // If the sector hasn't been authenticated, do so first
dotnfc 0:db8030e71f55 83 if (!authenticated)
dotnfc 0:db8030e71f55 84 {
dotnfc 0:db8030e71f55 85 // Starting of a new sector ... try to to authenticate
dotnfc 0:db8030e71f55 86 Serial.print("------------------------Sector ");Serial.print(currentblock/4, DEC);Serial.println("-------------------------");
dotnfc 0:db8030e71f55 87 if (currentblock == 0)
dotnfc 0:db8030e71f55 88 {
dotnfc 0:db8030e71f55 89 // This will be 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF for Mifare Classic (non-NDEF!)
dotnfc 0:db8030e71f55 90 // or 0xA0 0xA1 0xA2 0xA3 0xA4 0xA5 for NDEF formatted cards using key a,
dotnfc 0:db8030e71f55 91 // but keyb should be the same for both (0xFF 0xFF 0xFF 0xFF 0xFF 0xFF)
dotnfc 0:db8030e71f55 92 success = nfc.mifareclassic_AuthenticateBlock (uid, uidLength, currentblock, 1, keyuniversal);
dotnfc 0:db8030e71f55 93 }
dotnfc 0:db8030e71f55 94 else
dotnfc 0:db8030e71f55 95 {
dotnfc 0:db8030e71f55 96 // This will be 0xFF 0xFF 0xFF 0xFF 0xFF 0xFF for Mifare Classic (non-NDEF!)
dotnfc 0:db8030e71f55 97 // or 0xD3 0xF7 0xD3 0xF7 0xD3 0xF7 for NDEF formatted cards using key a,
dotnfc 0:db8030e71f55 98 // but keyb should be the same for both (0xFF 0xFF 0xFF 0xFF 0xFF 0xFF)
dotnfc 0:db8030e71f55 99 success = nfc.mifareclassic_AuthenticateBlock (uid, uidLength, currentblock, 1, keyuniversal);
dotnfc 0:db8030e71f55 100 }
dotnfc 0:db8030e71f55 101 if (success)
dotnfc 0:db8030e71f55 102 {
dotnfc 0:db8030e71f55 103 authenticated = true;
dotnfc 0:db8030e71f55 104 }
dotnfc 0:db8030e71f55 105 else
dotnfc 0:db8030e71f55 106 {
dotnfc 0:db8030e71f55 107 Serial.println("Authentication error");
dotnfc 0:db8030e71f55 108 }
dotnfc 0:db8030e71f55 109 }
dotnfc 0:db8030e71f55 110 // If we're still not authenticated just skip the block
dotnfc 0:db8030e71f55 111 if (!authenticated)
dotnfc 0:db8030e71f55 112 {
dotnfc 0:db8030e71f55 113 Serial.print("Block ");Serial.print(currentblock, DEC);Serial.println(" unable to authenticate");
dotnfc 0:db8030e71f55 114 }
dotnfc 0:db8030e71f55 115 else
dotnfc 0:db8030e71f55 116 {
dotnfc 0:db8030e71f55 117 // Authenticated ... we should be able to read the block now
dotnfc 0:db8030e71f55 118 // Dump the data into the 'data' array
dotnfc 0:db8030e71f55 119 success = nfc.mifareclassic_ReadDataBlock(currentblock, data);
dotnfc 0:db8030e71f55 120 if (success)
dotnfc 0:db8030e71f55 121 {
dotnfc 0:db8030e71f55 122 // Read successful
dotnfc 0:db8030e71f55 123 Serial.print("Block ");Serial.print(currentblock, DEC);
dotnfc 0:db8030e71f55 124 if (currentblock < 10)
dotnfc 0:db8030e71f55 125 {
dotnfc 0:db8030e71f55 126 Serial.print(" ");
dotnfc 0:db8030e71f55 127 }
dotnfc 0:db8030e71f55 128 else
dotnfc 0:db8030e71f55 129 {
dotnfc 0:db8030e71f55 130 Serial.print(" ");
dotnfc 0:db8030e71f55 131 }
dotnfc 0:db8030e71f55 132 // Dump the raw data
dotnfc 0:db8030e71f55 133 nfc.PrintHexChar(data, 16);
dotnfc 0:db8030e71f55 134 }
dotnfc 0:db8030e71f55 135 else
dotnfc 0:db8030e71f55 136 {
dotnfc 0:db8030e71f55 137 // Oops ... something happened
dotnfc 0:db8030e71f55 138 Serial.print("Block ");Serial.print(currentblock, DEC);
dotnfc 0:db8030e71f55 139 Serial.println(" unable to read this block");
dotnfc 0:db8030e71f55 140 }
dotnfc 0:db8030e71f55 141 }
dotnfc 0:db8030e71f55 142 }
dotnfc 0:db8030e71f55 143 }
dotnfc 0:db8030e71f55 144 else
dotnfc 0:db8030e71f55 145 {
dotnfc 0:db8030e71f55 146 Serial.println("Ooops ... this doesn't seem to be a Mifare Classic card!");
dotnfc 0:db8030e71f55 147 }
dotnfc 0:db8030e71f55 148 }
dotnfc 0:db8030e71f55 149 // Wait a bit before trying again
dotnfc 0:db8030e71f55 150 Serial.println("\n\nSend a character to run the mem dumper again!");
dotnfc 0:db8030e71f55 151 Serial.flush();
dotnfc 0:db8030e71f55 152 while (!Serial.available());
dotnfc 0:db8030e71f55 153 while (Serial.available()) {
dotnfc 0:db8030e71f55 154 Serial.read();
dotnfc 0:db8030e71f55 155 }
dotnfc 0:db8030e71f55 156 Serial.flush();
dotnfc 0:db8030e71f55 157 }