File content as of revision 17:b646b1e3970b:

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#ifndef _ROMID_HPP
#define _ROMID_HPP

#include "mbed.h"
#include <cstdint>
#include <cstring>

class RomId
{
public:
    static const std::size_t byteLen = 8;
    typedef std::uint8_t byteBuffer[byteLen];

    static std::uint8_t calculateCRC8(uint8_t crc8, uint8_t data);
    static std::uint8_t calculateCRC8(const uint8_t * data, size_t data_len, uint8_t crc);

private:
    static const std::size_t familyCodeIdx = 0;
    static const std::size_t crc8Idx = 7;
    static const std::uint8_t defaultByteVal = 0x00;

    byteBuffer m_romId;

public:
    const RomId & operator=(const RomId & rhs) {
        std::memcpy(this->m_romId, rhs.m_romId, byteLen);
        return rhs;
    }
    bool operator==(const RomId & rhs) const {
        return (std::memcmp(this->m_romId, rhs.m_romId, byteLen) == 0);
    }
    bool operator!=(const RomId & rhs) const {
        return !operator==(rhs);
    }
    operator byteBuffer &() {
        return m_romId;    // Conversion to array reference
    }
    operator const byteBuffer &() const {
        return m_romId;    // Conversion to const array reference
    }

    void reset() {
        std::memset(m_romId, defaultByteVal, byteLen);
    }

    RomId() {
        reset();
    }
    RomId(const RomId & romId) {
        operator=(romId);
    }
    RomId(const byteBuffer & romIdBytes) {
        std::memcpy(m_romId, romIdBytes, byteLen);
    }

    std::uint8_t familyCode() const {
        return m_romId[familyCodeIdx];
    }
    void setFamilyCode(std::uint8_t familyCode) {
        m_romId[familyCodeIdx] = familyCode;
    }

    std::uint8_t crc8() const {
        return m_romId[crc8Idx];
    }
    void setCrc8(std::uint8_t crc8) {
        m_romId[crc8Idx] = crc8;
    }
    bool crc8Valid() const {
        return (calculateCRC8(m_romId, (byteLen - 1), 0x00) == crc8());
    }
    void setValidCrc8() {
        setCrc8(calculateCRC8(m_romId, (byteLen - 1), 0x00));
    }

    bool valid() const {
        return (crc8Valid() && (familyCode() != defaultByteVal));
    }
};

#endif