NfcTag.cpp

#include "NfcTag.h"

void NfcTag::init() {
    Wire.begin(4, 16, 400000U);
}

void NfcTag::submitPassWd(byte* passWd) {
    Wire.beginTransmission(eeAddr);
    Wire.write(0x09);
    Wire.write(0x00);

    for (int i = 0; i < PASSWORD_LENGTH; i++) {
        Wire.write(passWd[i]);
    }
    Wire.write(0x09);
    for (int i = 0; i < PASSWORD_LENGTH; i++) {
        Wire.write(passWd[i]);
    }
    Wire.endTransmission();// stop transmitting
}

void NfcTag::writePassWd(byte* passWd) {
    Wire.beginTransmission(eeAddr);
    Wire.write(0x09);
    Wire.write(0x00);

    for (int i = 0; i < PASSWORD_LENGTH; i++) {
        Wire.write(passWd[i]);
    }
    Wire.write(0x07);
    for (int i = 0; i < PASSWORD_LENGTH; i++) {
        Wire.write(passWd[i]);
    }
    Wire.endTransmission();    // stop transmitting
}

void NfcTag::sectorProtectConfig(unsigned int sectorNumber, bool protectEnable, SectorAccessRight accessRight,
                                 SectorSelectPassWd passWd) {
    if (!protectEnable) {
        _EEPROM_Write_Byte(sectorNumber, 0x0);
    } else {
        _EEPROM_Write_Byte(sectorNumber, protectEnable | (accessRight << 1) | (passWd << 2));
    }
}

void NfcTag::clearSectorProtect(void) {
    byte buf[64] = {0x0};
    _EEPROM_Write_Bytes(0, buf, 64);
}


void NfcTag::sectorWriteSockConfig(unsigned int sectorNumber, bool sockEnable) {
    unsigned int sectorAddress = SECTOR_SECURITY_STATUS_BASE_ADDR + (sectorNumber / 8);
    byte sectorBit = sectorNumber % 8;
    byte preStatus = _EEPROM_Read_Byte(sectorAddress);
    //bool status = (preStatus|(1<<sectorBit))>>sectorBit;
    bool status = (preStatus >> sectorBit) & 0x01;
    if (status != sockEnable) {
        if (status == true) {
            writeByte(sectorAddress, preStatus & (~(1 << sectorBit)));
        } else {
            writeByte(sectorAddress, preStatus | (1 << sectorBit));
        }
    }
}


byte NfcTag::getDSFID() {
    return _EEPROM_Read_Byte(DSFID_ADDR);
}

byte NfcTag::getAFI() {
    return _EEPROM_Read_Byte(AFI_ADDR);
}

uint16_t NfcTag::getRFU() {
    uint16_t rfu = 0x00;
    rfu = _EEPROM_Read_Byte(RFU_ADDR);
    return (rfu << 8 | _EEPROM_Read_Byte(RFU_ADDR + 1));
}

byte NfcTag::getUID(byte* buf) {
    _EEPROM_Read_Bytes(UID_ADDR, buf, UID_LENGTH);
    return UID_LENGTH;
}

uint32_t NfcTag::getMemoryVolume() {
    uint32_t volume = 0x0;
    volume = _EEPROM_Read_Byte(MEMORY_VOLUME_ADDR);
    volume = volume << 8 | _EEPROM_Read_Byte(MEMORY_VOLUME_ADDR + 1);
    volume = volume << 8 | _EEPROM_Read_Byte(MEMORY_VOLUME_ADDR + 2);
    return volume;
}

byte NfcTag::getICNumber() {
    return _EEPROM_Read_Byte(IC_NUMBER_ADDR);
}

void NfcTag::clearMemory() {
    for (int i = 0; i < EEPROM_I2C_LENGTH; i++) {
        writeByte(i, 0x0);
    }
}

void NfcTag::writeByte(unsigned int address, byte data) {
    _EEPROM_Write_Byte(address, data);
}

void NfcTag::writeBytes(unsigned int address, byte* buf, unsigned int len) {
    _EEPROM_Write_Bytes(address, buf, len);
}

byte NfcTag::readByte(unsigned int address) {
    return _EEPROM_Read_Byte(address);
}

void NfcTag::readBytes(unsigned int address, byte* buf, unsigned int len) {
    _EEPROM_Read_Bytes(address, buf, len);
}

void NfcTag::_EEPROM_Write_Byte(unsigned int address, byte data) {
    Wire.beginTransmission(eeAddr);
    Wire.write((int)(address >> 8));    // MSB
    Wire.write((int)(address & 0xFF));// LSB
    Wire.write(data);   // sends one byte
    //delay(5);
    Wire.endTransmission(); // stop transmitting
}

void NfcTag::_EEPROM_Write_Bytes(unsigned int address, byte* buf, unsigned int len) {
    Wire.beginTransmission(eeAddr);
    Wire.write((int)(address >> 8));    // MSB
    Wire.write((int)(address & 0xFF));// LSB
    for (int i = 0; i < len; i++) {
        Wire.write(buf[i]); // sends one byte
    }
    Wire.endTransmission(); // stop transmitting
}

byte NfcTag::_EEPROM_Read_Byte(unsigned int address) {
    byte rdata = 0x7F;
    Wire.beginTransmission(eeAddr); //Device Address
    Wire.write((int)(address >> 8)); // EEPROM_MSB
    Wire.write((int)(address & 0xFF)); // EEPROM_LSB
    Wire.endTransmission();
    Wire.requestFrom(eeAddr, 1);
    rdata = Wire.read();
    return rdata;
}

unsigned int NfcTag::_EEPROM_Read_Bytes(unsigned int address, byte* buf, unsigned int len) {
    byte rdata = 0x7F;
    Wire.beginTransmission(eeAddr); //Device Address
    Wire.write((int)(address >> 8)); // EEPROM_MSB
    Wire.write((int)(address & 0xFF)); // EEPROM_LSB
    Wire.endTransmission();

    int i = 0;
    Wire.requestFrom(eeAddr, len);
    while (Wire.available()) {
        buf[i++] = Wire.read();
    }
    return i;
}