SerialPort.h

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#include "stdafx.h"

class CSerialPort  
{  
public:  
        CSerialPort(void);  
        virtual ~CSerialPort(void);  

private:  
        HANDLE  m_hComm;  
        DCB     m_dcb;  
        COMMTIMEOUTS m_CommTimeouts;  
        bool    m_bPortReady;  
        bool    m_bWriteRC;  
        bool    m_bReadRC;  
        DWORD   m_iBytesWritten;  
        DWORD   m_iBytesRead;  
        DWORD   m_dwBytesRead;  

public:  
        void ClosePort();  
        bool ReadByte(BYTE &resp);  
        bool ReadByte(BYTE* &resp, UINT size);  
        bool WriteByte(BYTE bybyte);  
        bool OpenPort(CString portname);  
        bool SetCommunicationTimeouts(DWORD ReadIntervalTimeout,  
                DWORD ReadTotalTimeoutMultiplier, DWORD ReadTotalTimeoutConstant,  
                DWORD WriteTotalTimeoutMultiplier,DWORD WriteTotalTimeoutConstant);  
        bool ConfigurePort(DWORD BaudRate, BYTE ByteSize, DWORD fParity,   
                BYTE  Parity,BYTE StopBits);  
};