comm1.h

VC6++ program demo source for communication with PLC to read and write data.

// comm.h: interface for the comm class.
// Lop chua cac thu tuc truyen thong qua cong RS232C
// DANG THANH TRUNG 11/1999
//////////////////////////////////////////////////////////////////////

#if !defined(AFX_COMM_H__D54DCC94_3D50_11D3_AAB4_DE898AE6A601__INCLUDED_)
#define AFX_COMM_H__D54DCC94_3D50_11D3_AAB4_DE898AE6A601__INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif // _MSC_VER >= 1000

#define STX 0x2
#define ETX 0x3
#define EOT 0x4
#define ENQ 0x5
#define ACK 0x6
#define LF 0xA
#define CL 0xC
#define CR 0xD
#define NAK 0x15

class comm  
{
public:
	int PlcRead(char *lpBuf);
	BOOL  Connect(char *file, int m_BaudRate, int m_ByteSize, int m_Parity, int m_StopBits);
	void Disconnect();
	BOOL WriteComm( char *lpBuf);
	int ReadComm( char *lpBuf,int so_byte);
	HANDLE hComm;
	comm();
	virtual ~comm();

};

#endif // !defined(AFX_COMM_H__D54DCC94_3D50_11D3_AAB4_DE898AE6A601__INCLUDED_)