DlmsReader.h

#ifndef _DLMSREADER_h
#define _DLMSREADER_h

#include "Crc16.h"

#if defined(ARDUINO) && ARDUINO >= 100
#include "arduino.h"
#else
#include "WProgram.h"
#endif

typedef void(*LOG_FN)(const char* fmt, ...);
typedef void(*SENDBUFFER_FN)(byte* buf, int len);
typedef unsigned long(*GETEPOCHTIME_FN)(void);

#define DLMS_READER_BUFFER_SIZE 512
#define DLMS_READER_MAX_ADDRESS_SIZE 5

enum HDLCState { kHDLCState_Waiting, kHDLCState_Data, kHDLCState_Escaped };

class DlmsReader
{
public:
  uint8_t debugLevel;
  Stream *debug;
  GETEPOCHTIME_FN getEpochTime;
  LOG_FN netLog;
  SENDBUFFER_FN sendBuffer;

  unsigned long messageTimestamp;

  DlmsReader();
  bool Read(byte data);
  bool ReadOld(byte data);
  bool GetUserDataBuffer(byte *&dataBuffer, int& length);
  //int GetRawData(byte *buffer, int start, int length);

protected:
  Crc16Class Crc16;

private:
  byte buffer[DLMS_READER_BUFFER_SIZE];
  int position;
  int dataLength;
  HDLCState state;

  byte frameFormatType;
  byte destinationAddress[DLMS_READER_MAX_ADDRESS_SIZE];
  byte destinationAddressLength;
  byte sourceAddress[DLMS_READER_MAX_ADDRESS_SIZE];
  byte sourceAddressLength;

  void Clear();
  int GetAddress(int addressPosition, byte* buffer, int start, int length);
  unsigned short GetChecksum(int checksumPosition);
  bool IsValidFrameFormat(byte frameFormatType);
  void WriteBuffer();
  void debugPrint(byte *buffer, int start, int length);
};

#endif