serialport.h

串口的监控程序,提供了固定命令模式和

/*
**	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 (ICT Deventer)
**
**	COPYRIGHT			(c) ICT Automatisering 1997, all rights reserved.
**
**
*/

#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.  



//##ModelId=3FFC8F3902FD
class CSerialPort
{														 
public:
	
	// contruction and destruction
	//##ModelId=3FFC8F39030D
	CSerialPort();
	//##ModelId=3FFC8F39030E
	virtual		~CSerialPort();

	// port initialisation											
	//##ModelId=3FFC8F39031C
	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 = 512);

	// start/stop comm watching
	//##ModelId=3FFC8F39032F
	BOOL		StartMonitoring();
	//##ModelId=3FFC8F39033C
	BOOL		RestartMonitoring();
	//##ModelId=3FFC8F39033D
	BOOL		StopMonitoring();

	//##ModelId=3FFC8F39033E
	DWORD		GetWriteBufferSize();
	//##ModelId=3FFC8F39033F
	DWORD		GetCommEvents();
	//##ModelId=3FFC8F39034B
	DCB			GetDCB();

	//##ModelId=3FFC8F39034C
	void		WriteToPort(char* string);

protected:
	// protected memberfunctions
	//##ModelId=3FFC8F39034E
	void		ProcessErrorMessage(char* ErrorText);
	//##ModelId=3FFC8F39035C
	static UINT	CommThread(LPVOID pParam);
	//##ModelId=3FFC8F39035F
	static void	ReceiveChar(CSerialPort* port, COMSTAT comstat);
	//##ModelId=3FFC8F39036E
	static void	WriteChar(CSerialPort* port);

	// thread
	//##ModelId=3FFC8F39037B
	CWinThread*			m_Thread;

	// synchronisation objects
	//##ModelId=3FFC8F39037F
	CRITICAL_SECTION	m_csCommunicationSync;
	//##ModelId=3FFC8F39038A
	BOOL				m_bThreadAlive;

	// handles
	//##ModelId=3FFC8F39038B
	HANDLE				m_hShutdownEvent;
	//##ModelId=3FFC8F390399
	HANDLE				m_hComm;
	//##ModelId=3FFC8F39039A
	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. 
	//##ModelId=3FFC8F3903A9
	HANDLE				m_hEventArray[3];

	// structures
	//##ModelId=3FFC8F3903AB
	OVERLAPPED			m_ov;
	//##ModelId=3FFC8F3903BA
	COMMTIMEOUTS		m_CommTimeouts;
	//##ModelId=3FFC8F3903C9
	DCB					m_dcb;

	// owner window
	//##ModelId=3FFC8F3903CE
	CWnd*				m_pOwner;

	// misc
	//##ModelId=3FFC8F3903D8
	UINT				m_nPortNr;
	//##ModelId=3FFC8F3903D9
	char*				m_szWriteBuffer;
	//##ModelId=3FFC8F3A0000
	DWORD				m_dwCommEvents;
	//##ModelId=3FFC8F3A000F
	DWORD				m_nWriteBufferSize;
};

#endif __SERIALPORT_H__