cemi_frame.h

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#pragma once
 
#include "knx_types.h"
#include "stdint.h"
#include "npdu.h"
#include "tpdu.h"
#include "apdu.h"
#include "config.h"
 
#define NPDU_LPDU_DIFF 8
#define TPDU_NPDU_DIFF 1
#define APDU_TPDU_DIFF 0
#define TPDU_LPDU_DIFF (TPDU_NPDU_DIFF + NPDU_LPDU_DIFF)
#define APDU_LPDU_DIFF (APDU_TPDU_DIFF + TPDU_NPDU_DIFF + NPDU_LPDU_DIFF)
 
// Mesg Code and additional info length
#define CEMI_HEADER_SIZE 2
 
class CemiFrame
{
        friend class DataLinkLayer;
 
    public:
        CemiFrame(uint8_t* data, uint16_t length);
        CemiFrame(uint8_t apduLength);
        CemiFrame(const CemiFrame& other);
        CemiFrame& operator=(CemiFrame other);
 
        MessageCode messageCode() const;
        void messageCode(MessageCode value);
        uint16_t totalLenght() const;
        uint16_t telegramLengthtTP() const;
        void fillTelegramTP(uint8_t* data);
        uint16_t telegramLengthtRF() const;
        void fillTelegramRF(uint8_t* data);
        uint8_t* data();
        uint16_t dataLength();
 
        FrameFormat frameType() const;
        void frameType(FrameFormat value);
        Repetition repetition() const;
        void repetition(Repetition value);
        SystemBroadcast systemBroadcast() const;
        void systemBroadcast(SystemBroadcast value);
        Priority priority() const;
        void priority(Priority value);
        AckType ack() const;
        void ack(AckType value);
        Confirm confirm() const;
        void confirm(Confirm value);
        AddressType addressType() const;
        void addressType(AddressType value);
        uint8_t hopCount() const;
        void hopCount(uint8_t value);
        uint16_t sourceAddress() const;
        void sourceAddress(uint16_t value);
        uint16_t destinationAddress() const;
        void destinationAddress(uint16_t value);
 
#ifdef USE_RF
        // only for RF medium
        uint8_t* rfSerialOrDoA() const;
        void rfSerialOrDoA(const uint8_t* rfSerialOrDoA);
        uint8_t rfInfo() const;
        void rfInfo(uint8_t rfInfo);
        uint8_t rfLfn() const;
        void rfLfn(uint8_t rfInfo);
#endif
        NPDU& npdu();
        TPDU& tpdu();
        APDU& apdu();
 
        uint8_t calcCrcTP(uint8_t* buffer, uint16_t len);
        bool valid() const;
 
    private:
        uint8_t buffer[0xff + NPDU_LPDU_DIFF] = {0}; //only valid of add info is zero
        uint8_t* _data = 0;
        uint8_t* _ctrl1 = 0;
        NPDU _npdu;
        TPDU _tpdu;
        APDU _apdu;
        uint16_t _length = 0; // only set if created from byte array
 
#ifdef USE_RF
        // FIXME: integrate this propery in _data
        // only for RF medium
        uint8_t* _rfSerialOrDoA = 0;
        uint8_t  _rfInfo = 0;
        uint8_t  _rfLfn = 0xFF; // RF Data Link layer frame number
#endif
 
        uint8_t _sourceInterfaceIndex;
};