加密扇區需要先讀出解密的，不好搞，這有個讀寫扇區的程序，自己研究吧
接線同上
- #include <SPI.h>
- #include <MFRC522.h>
- #define RST_PIN 9 // Configurable, see typical pin layout above
- #define SS_PIN 10 // Configurable, see typical pin layout above
- MFRC522 mfrc522(SS_PIN, RST_PIN); // Create MFRC522 instance.
- MFRC522::MIFARE_Key key;
- /**
- * Initialize.
- */
- void setup() {
- Serial.begin(9600); // Initialize serial communications with the PC
- while (!Serial); // Do nothing if no serial port is opened (added for Arduinos based on ATMEGA32U4)
- SPI.begin(); // Init SPI bus
- mfrc522.PCD_Init(); // Init MFRC522 card
- // Prepare the key (used both as key A and as key B)
- // using FFFFFFFFFFFFh which is the default at chip delivery from the factory
- for (byte i = 0; i < 6; i++) {
- key.keyByte[i] = 0xFF;
- }
- Serial.println(F("Scan a MIFARE Classic PICC to demonstrate read and write."));
- Serial.print(F("Using key (for A and B):"));
- dump_byte_array(key.keyByte, MFRC522::MF_KEY_SIZE);
- Serial.println();
-
- Serial.println(F("BEWARE: Data will be written to the PICC, in sector #1"));
- }
- /**
- * Main loop.
- */
- void loop() {
- // Look for new cards
- if ( ! mfrc522.PICC_IsNewCardPresent())
- return;
- // Select one of the cards
- if ( ! mfrc522.PICC_ReadCardSerial())
- return;
- // Show some details of the PICC (that is: the tag/card)
- Serial.print(F("Card UID:"));
- dump_byte_array(mfrc522.uid.uidByte, mfrc522.uid.size);
- Serial.println();
- Serial.print(F("PICC type: "));
- MFRC522::PICC_Type piccType = mfrc522.PICC_GetType(mfrc522.uid.sak);
- Serial.println(mfrc522.PICC_GetTypeName(piccType));
- // Check for compatibility
- if ( piccType != MFRC522::PICC_TYPE_MIFARE_MINI
- && piccType != MFRC522::PICC_TYPE_MIFARE_1K
- && piccType != MFRC522::PICC_TYPE_MIFARE_4K) {
- Serial.println(F("This sample only works with MIFARE Classic cards."));
- return;
- }
- // In this sample we use the second sector,
- // that is: sector #1, covering block #4 up to and including block #7
- byte sector = 1;
- byte blockAddr = 4;
- byte dataBlock[] = {
- 0x01, 0x02, 0x03, 0x04, // 1, 2, 3, 4,
- 0x05, 0x06, 0x07, 0x08, // 5, 6, 7, 8,
- 0x08, 0x09, 0xff, 0x0b, // 9, 10, 255, 12,
- 0x0c, 0x0d, 0x0e, 0x0f // 13, 14, 15, 16
- };
- byte trailerBlock = 7;
- MFRC522::StatusCode status;
- byte buffer[18];
- byte size = sizeof(buffer);
- // Authenticate using key A
- Serial.println(F("Authenticating using key A..."));
- status = (MFRC522::StatusCode) mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_A, trailerBlock, &key, &(mfrc522.uid));
- if (status != MFRC522::STATUS_OK) {
- Serial.print(F("PCD_Authenticate() failed: "));
- Serial.println(mfrc522.GetStatusCodeName(status));
- return;
- }
- // Show the whole sector as it currently is
- Serial.println(F("Current data in sector:"));
- mfrc522.PICC_DumpMifareClassicSectorToSerial(&(mfrc522.uid), &key, sector);
- Serial.println();
- // Read data from the block
- Serial.print(F("Reading data from block ")); Serial.print(blockAddr);
- Serial.println(F(" ..."));
- status = (MFRC522::StatusCode) mfrc522.MIFARE_Read(blockAddr, buffer, &size);
- if (status != MFRC522::STATUS_OK) {
- Serial.print(F("MIFARE_Read() failed: "));
- Serial.println(mfrc522.GetStatusCodeName(status));
- }
- Serial.print(F("Data in block ")); Serial.print(blockAddr); Serial.println(F(":"));
- dump_byte_array(buffer, 16); Serial.println();
- Serial.println();
- // Authenticate using key B
- Serial.println(F("Authenticating again using key B..."));
- status = (MFRC522::StatusCode) mfrc522.PCD_Authenticate(MFRC522::PICC_CMD_MF_AUTH_KEY_B, trailerBlock, &key, &(mfrc522.uid));
- if (status != MFRC522::STATUS_OK) {
- Serial.print(F("PCD_Authenticate() failed: "));
- Serial.println(mfrc522.GetStatusCodeName(status));
- return;
- }
- // Write data to the block
- Serial.print(F("Writing data into block ")); Serial.print(blockAddr);
- Serial.println(F(" ..."));
- dump_byte_array(dataBlock, 16); Serial.println();
- status = (MFRC522::StatusCode) mfrc522.MIFARE_Write(blockAddr, dataBlock, 16);
- if (status != MFRC522::STATUS_OK) {
- Serial.print(F("MIFARE_Write() failed: "));
- Serial.println(mfrc522.GetStatusCodeName(status));
- }
- Serial.println();
- // Read data from the block (again, should now be what we have written)
- Serial.print(F("Reading data from block ")); Serial.print(blockAddr);
- Serial.println(F(" ..."));
- status = (MFRC522::StatusCode) mfrc522.MIFARE_Read(blockAddr, buffer, &size);
- if (status != MFRC522::STATUS_OK) {
- Serial.print(F("MIFARE_Read() failed: "));
- Serial.println(mfrc522.GetStatusCodeName(status));
- }
- Serial.print(F("Data in block ")); Serial.print(blockAddr); Serial.println(F(":"));
- dump_byte_array(buffer, 16); Serial.println();
-
- // Check that data in block is what we have written
- // by counting the number of bytes that are equal
- Serial.println(F("Checking result..."));
- byte count = 0;
- for (byte i = 0; i < 16; i++) {
- // Compare buffer (= what we've read) with dataBlock (= what we've written)
- if (buffer[i] == dataBlock[i])
- count++;
- }
- Serial.print(F("Number of bytes that match = ")); Serial.println(count);
- if (count == 16) {
- Serial.println(F("Success :-)"));
- } else {
- Serial.println(F("Failure, no match :-("));
- Serial.println(F(" perhaps the write didn't work properly..."));
- }
- Serial.println();
-
- // Dump the sector data
- Serial.println(F("Current data in sector:"));
- mfrc522.PICC_DumpMifareClassicSectorToSerial(&(mfrc522.uid), &key, sector);
- Serial.println();
- // Halt PICC
- mfrc522.PICC_HaltA();
- // Stop encryption on PCD
- mfrc522.PCD_StopCrypto1();
- }
- /**
- * Helper routine to dump a byte array as hex values to Serial.
- */
- void dump_byte_array(byte *buffer, byte bufferSize) {
- for (byte i = 0; i < bufferSize; i++) {
- Serial.print(buffer[i] < 0x10 ? " 0" : " ");
- Serial.print(buffer[i], HEX);
- }
- }
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