serialportbase.h

windows 下串口编程。 实现串口收发

class CSerialPortBase
{														 
public:
	int m_nWriteSize;
	void ClosePort();
	// contruction and destruction
	CSerialPortBase();
	virtual		~CSerialPortBase();

	// port initialisation											
	BOOL		InitPort(CWnd* pPortOwner,
						UINT portnr = 1, 
						UINT baud = 9600, 
						char parity = 'N', 
						UINT databits = 8, 
						UINT stopbits = 1, 
						DWORD dwCommEvents = EV_RXCHAR, 
						UINT writebuffersize = 1024);

	HANDLE				m_hComm; // 串口指针

	// start/stop comm watching
	BOOL		StartMonitoring();
	BOOL		RestartMonitoring();
	BOOL		StopMonitoring();

	DWORD		GetWriteBufferSize();
	DWORD		GetCommEvents();
	DCB			GetDCB();

	void		WriteToPort(char* string);
	void		WriteToPort(char* string,int n);
	void		WriteToPort(LPCTSTR string);
	void		WriteToPort(LPCTSTR string,int n);

protected:
	// protected memberfunctions
	void		ProcessErrorMessage(char* ErrorText);
	static UINT	CommThread(LPVOID pParam);
	static void	ReceiveChar(CSerialPort* port, COMSTAT comstat);
	static void	WriteChar(CSerialPort* port);

	// thread
	CWinThread*			m_Thread;

	// synchronisation objects
	CRITICAL_SECTION	m_csCommunicationSync;
	BOOL				m_bThreadAlive;

	// handles
	HANDLE				m_hWriteEvent;
	HANDLE				m_hShutdownEvent;

	// Event array. 
	// One element is used for  event. There are two event handles for each port.
	// A Write event and a receiveeach character event which is located in the overlapped structure (m_ov.hEvent).
	// There is a general shutdown when the port is closed. 
	HANDLE				m_hEventArray[3];

	// structures
	OVERLAPPED			m_ov;
	COMMTIMEOUTS		m_CommTimeouts;
	DCB					m_dcb;

	// owner window
	CWnd*				m_pOwner;

	// misc
	UINT				m_nPortNr;
	char*				m_szWriteBuffer;
	DWORD				m_dwCommEvents;
	DWORD				m_nWriteBufferSize;

private:
	BOOL SerialPortConfig();
};