serialport.h

这是一个完整的无线通讯工程

/*
**	FILENAME			CSerialPort.h
**
**	PURPOSE				This class can read, write and watch one serial port.
**						It sends messages to its owner when something happends on the port
**						The class creates a thread for reading and writing so the main
**						program is not blocked.
**
**	CREATION DATE		15-09-1997
**	LAST MODIFICATION	12-11-1997
**
**	AUTHOR				Remon Spekreijse
**
**
*/

#ifndef __SERIALPORT_H__
#define __SERIALPORT_H__

#define WM_COMM_BREAK_DETECTED		WM_USER+1	// A break was detected on input.
#define WM_COMM_CTS_DETECTED		WM_USER+2	// The CTS (clear-to-send) signal changed state. 
#define WM_COMM_DSR_DETECTED		WM_USER+3	// The DSR (data-set-ready) signal changed state. 
#define WM_COMM_ERR_DETECTED		WM_USER+4	// A line-status error occurred. Line-status errors are CE_FRAME, CE_OVERRUN, and CE_RXPARITY. 
#define WM_COMM_RING_DETECTED		WM_USER+5	// A ring indicator was detected. 
#define WM_COMM_RLSD_DETECTED		WM_USER+6	// The RLSD (receive-line-signal-detect) signal changed state. 
#define WM_COMM_RXCHAR				WM_USER+7	// A character was received and placed in the input buffer. 
#define WM_COMM_RXFLAG_DETECTED		WM_USER+8	// The event character was received and placed in the input buffer.  
#define WM_COMM_TXEMPTY_DETECTED	WM_USER+9	// The last character in the output buffer was sent.  
#define	SERIAL_REMOVE				WM_USER+10
#define	MAX_RECVBUFFER_SIZE		4098
class CSerialPort
{														 
public:
	void		SetAsyn(BOOL	bAsyn);
	void ChgConnectBuf(BYTE *buf,int size);
	// contruction and destruction
	CSerialPort();
	virtual		~CSerialPort();

	// port initialisation											
	BOOL		InitPort(CWnd* pPortOwner, UINT portnr = 1, UINT baud = 19200, char parity = 'N', UINT databits = 8, UINT stopsbits = 1, DWORD dwCommEvents = EV_RXCHAR | EV_CTS, UINT nBufferSize = 1024);
	void		DesInitPort();
	
	void		StopContinueSend(BYTE *buf,int size);
	void		StartContinueSend(BYTE *buf,int size,int	sleep);
		
	// start/stop comm watching
	BOOL		StartMonitoring();
	BOOL		RestartMonitoring();
	BOOL		StopMonitoring();

	DWORD		GetWriteBufferSize();
	DWORD		GetCommEvents();
	DCB			GetDCB();
	BOOL		SetDCBa(DCB		&dcb);
	BOOL		GetDCBa(DCB     &dcb);
	void		WriteToPort(BYTE* string,int strlen);
	DCB			m_dcb;
	HANDLE		m_hComm;
	BOOL		m_bAsyn;
	static void	WriteChar(CSerialPort* port);
	int			WriteCom(BYTE Outbuff[], int size);
	void		InputChar(char ch);
	int			ReadChars(char *szBuf, int nBuf);
	int			GetChars(char *szBuf, int nBuf);
	void		FreeRecvBuf();
		
protected:
	// protected memberfunctions
	void		ProcessErrorMessage(char* ErrorText);
	static UINT	CommThread(LPVOID pParam);
	static void	ReceiveChar(CSerialPort* port, COMSTAT comstat);
	
	static		UINT	ComContinueSendThread(LPVOID lpVoid);
	void		StopSend();
	// thread
	CWinThread*			m_Thread;

	//
	CRITICAL_SECTION	m_csRecvBufSync;
	char	*m_szRecvBuffer;
	int		m_nRecvBuffer;

	// synchronisation objects
	CRITICAL_SECTION	m_csCommunicationSync;
	BOOL				m_bThreadAlive;

	// handles
	HANDLE				m_hShutdownEvent;
	HANDLE				m_hWriteEvent;

	// Event array. 
	// One element is used for each event. There are two event handles for each port.
	// A Write event and a receive 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;

	// owner window
	CWnd*				m_pOwner;

	// misc
	UINT				m_nPortNr;
	char*				m_szWriteBuffer;
	BYTE*				WriteBuf;
	DWORD				WriteBufLen;
	DWORD				m_dwCommEvents;
	DWORD				m_nWriteBufferSize;
};

#endif __SERIALPORT_H__