#pragma once

/////////////////////////////////////////////////////////////////////
//FgModBus: Library for EroElectronic Instruments with ModBus 
//          protocol. 
//Softech di Germinara - Via Maestra n.2  - 10064 Pinerolo (TO) ITALY
//www.germinara.it -  franco@germinara.it - Tel. +390121339015
/////////////////////////////////////////////////////////////////////
//Version: 1.0.0
//Last Update: 14/07/2002
/////////////////////////////////////////////////////////////////////
//Comments: Free Use.
//
//
//
/////////////////////////////////////////////////////////////////////
#ifdef BUILD_LIBRARY
#include "sicommctrl1.h" //SI_COMM ActiveX Object at 
                         //     www.sinnovations.com 
#endif

#define MAX_MODBUS_BUF_SIZE 100
#define MAX_TX_BUF_SIZE MAX_MODBUS_BUF_SIZE+8
#define MAX_RX_BUF_SIZE MAX_MODBUS_BUF_SIZE+8

#define MODBUS_FUNCT_READ_NBITS    2
#define MODBUS_FUNCT_READ_WORD     4
#define MODBUS_FUNCT_WRITE_BIT     5
#define MODBUS_FUNCT_WRITE_WORD    6
#define MODBUS_FUNCT_WRITE_NBITS  15
#define MODBUS_FUNCT_WRITE_NWORDS 16

#define MODBUS_NO_ERROR  0
#define MODBUS_TX_ERROR  1
#define MODBUS_RX_ERROR  2
#define MODBUS_CRC_ERROR 3
#define MODBUS_ILLEGAL_ADDRESS_ERROR 4
#define MODBUS_ILLEGAL_DATA_VALUE_ERROR 5
#define MODBUS_ILLEGAL_NUMBER_OF_DATA_REQUIRED_ERROR 6
#define MODBUS_BIT_CANNOT_BE_MODIFIED_ERROR 7
#define MODBUS_CONTROL_PARAMETER_ERROR 8
#define MODBUS_BUFFER_RX_ERROR 9
#define MODBUS_ILLEGAL_SETPOINT_DATA_VALUE_ERROR 10
#define MODBUS_BYTES_DONT_MATCH 11
#define MODBUS_UNKNOW_ERROR 10000

class AFX_CLASS_EXPORT CBseModBus{
 private:

 unsigned char  txbuffer[MAX_TX_BUF_SIZE]; //Trasmit Buffer
 unsigned char  rxbuffer[MAX_TX_BUF_SIZE]; //Receive Buffer

 //Used for convertion BYTE to BITs and viceversa
 union{
  struct{
   unsigned char low:4;
   unsigned char high:4;
  }nibble;
  struct{
   unsigned char b0:1;
   unsigned char b1:1;
   unsigned char b2:1;
   unsigned char b3:1;
   unsigned char b4:1;
   unsigned char b5:1;
   unsigned char b6:1;
   unsigned char b7:1;
  }bit;
  BYTE byte;
 }dato;
 //Used for convertion WORD to BYTEs and viceversa
 union{
  struct dataword{
   unsigned char lsb;
   unsigned char msb;
  }byte;
  WORD dw;
 }word;

 //Standard Structure User for ModBus protocol
 struct SendFrameHeader{
  unsigned char s_addr;       //Address of Slave
  unsigned char f_code;       //ModBus Code Function
  unsigned short int devAddr; //Device Memory Address
 };
 struct SendFrameData{    
  unsigned char data[MAX_MODBUS_BUF_SIZE]; //DataBuffer
  int nBytes;
 };
 struct SendFrameFooter{    //                      16    15    2
  unsigned short int crc16; //Errore Check CRC-16: X   + X   + X  + 1
 };
 //Standard Packet Data
 struct SendFramePacket{
  struct SendFrameHeader SndFrmHdr;
  struct SendFrameData SndFrmData;
  struct SendFrameFooter SndFrmFtr;
 }SndFrmPck;

 int m_nDelay; //Delay Time Before Test for Receive Data
 long m_nBytesInRXBuffer; //Number of valid bytes in Rx Buffer
 CString m_strLastEECommand;//Last EE command request.

 private:
 //Base Operation
 unsigned short int BuildCRC16(unsigned char addr,unsigned char fcode,unsigned short int devAddr,unsigned char *data,int nBytes); //Build the CRC-16 value (Base value: 0xFFFF)
 unsigned short int BuildCRC16(unsigned char *data,int nBytes); //Build the CRC-16 value (Base value: 0xFFFF)
 void PraparePacket(unsigned char slave_addr,unsigned char functcode,unsigned short int devAddr, unsigned char *data,int nBytes); //Prepare data packet
 bool SendPacketToSlave(CSicommctrl1 *m_pSiCommEro); //Send packet data to Serial
 bool ReceivePacketToSlave(CSicommctrl1 *m_pSiCommEro); //Receive packet data from Serial
 void SetBit(int nBit,BOOL sts); //Set Bit
 void SetBit(CString strNBit,BOOL sts); //Set Bit
 BOOL GetBit(CString strNBit);//Get Bit
 BOOL GetBit(int nBit);//Get Bit
 int CheckPacketForError(bool stsSend,bool stsReceive); //Check replay message 

 public:
 //Helper Functions
 void SetDelayTime(int nDelay){ m_nDelay = nDelay;}; //Set Delay Time
 int GetDelayTime(){ return m_nDelay; }; //Get Delay Time


 public:
 //EroElectronic Specific Command
 CString DecodeError(int nErrorCode); //Decode Error code
 int EE_SetRemote(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,bool sts=true); //Set Remote Mode
 int EE_SetSetPoint(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,double valSP);//Set SetPoint Value
 int EE_GetSetPoint(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,double *valSP);//Get the current SetPoint
 int EE_GetTemperature(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,double *valTEMP); //Get Current Temperature
 int EE_GetDeviceStatus(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,BOOL& bAlmSCA,BOOL& bAlm1,BOOL& bAlm2,BOOL& bChangedOccurred,BOOL& bTune,BOOL& bAdaptive,BOOL& bLock,BOOL& bControlMode,BOOL& bLocal,BOOL& bAuto,BOOL& bCtrlEnabled,BOOL& bSmart); //Get Bit Device Status in CONTROL MODE
 int EE_SetDeviceStatus(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,BOOL bLocal,BOOL bAuto,BOOL bCtrlEnabled,BOOL bSmart,BOOL bManualAlmRst,BOOL bLoadDefault,BOOL bEnableConfigMode); //Set Bit for change device status CONTROL MODE
 int EE_GetAlm(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,unsigned char nAlm,double *valSP);//Get the current AlmX threshold
 int EE_SetAlm(CSicommctrl1 *m_pSiCommEro,unsigned char slave_addr,unsigned char nAlm,double valSP);//set the current AlmX threshold
  
 public:
	CBseModBus();  //Standard Contructor
	~CBseModBus(); //Destructor
};