#ifndef DLBus_H
#define DLBus_H

#include <Arduino.h>

/*********************************************************************************************\
  DLBus subs to get values from the receiving bitstream
\*********************************************************************************************/
// one data frame has <P092_DataSettings.DataBytes> data bytes + SYNC, e.g. 64 * (8+1+1) + 16 = 656
// 656 * 2 = 1312 (twice as much as a data frame is saved
// so there's one complete data frame

#define DLbus_MaxDataBytes 64
#define DLbus_AdditionalRecBytes 2
#define DLbus_StopBits 1
#define DLbus_StartBits 1
#define DLBus_SyncBits 16
#define DLBus_ReserveBytes 20
#define DLBus_BitChangeFactor 2
#define DLbus_MaxDataBits (((DLbus_MaxDataBytes + DLbus_AdditionalRecBytes) * (DLbus_StartBits + 8 + DLbus_StopBits) + DLBus_SyncBits) * DLBus_BitChangeFactor) + DLBus_ReserveBytes
        // MaxDataBits is double of the maximum bit length because each bit change is stored
        // (((64+2) * (8+1+1) + 16) * 2) + 50 = 1402 bytes

class DLBus
{
	public:
		DLBus();	// constructor of DLBus object
		~DLBus();	// destructor of DLBus object

		volatile uint8_t ISR_DLB_Pin = 0xFF;
		volatile boolean ISR_Receiving = false;            	// receiving flag
		volatile boolean ISR_AllBitsReceived = false;
		volatile uint16_t ISR_PulseCount;                   // number of received pulses
		volatile uint16_t ISR_PulseNumber;                  // max naumber of the received pulses
		volatile uint16_t ISR_MinPulseWidth, ISR_MaxPulseWidth, ISR_MinDoublePulseWidth, ISR_MaxDoublePulseWidth;
		// identification bytes for each DL bus device
	  uint8_t DeviceBytes[2];
		uint8_t ByteStream[DLbus_MaxDataBits / 8 + 1];  		// every bit gets sorted into a bitmap
		boolean IsLogLevelInfo = false;
		uint8_t LogLevelInfo = 0xff;
		uint8_t LogLevelError = 0xFF;
		void attachDLBusInterrupt(void);
		void StartReceiving(void);
		boolean CheckTimings(void);
		boolean Processing(void);
		boolean CheckCRC(uint8_t IdxCRC);
	private:
		volatile uint32_t ISR_TimeLastBitChange = 0;				// remember time of last transition
		uint8_t DLbus_ChangeBitStream[DLbus_MaxDataBits];   // received bit change stream (each bit change is extended to uint8_t, containing the timing flags)
		uint16_t BitNumber;                                 // bit number of the received DLbus_ChangeBitStream
		static void ISR(void);
		void ISR_PinChanged(void);
		void ProcessBit(uint8_t b);
		int Analyze(void);
		void Invert(void);
		uint8_t ReadBit(int pos);
		void WriteBit(int pos, uint8_t set);
		void Trim(int start_bit);
		boolean CheckDevice(void);
		static DLBus* __instance;
		void AddToInfoLog(const String& string);
		void AddToErrorLog(const String& string);
};

#endif