mcom.h

串口通讯,采用异步方式,采用回调上传数据

/*******************************************************
文件名：mcom.h,串口通讯类头文件
作者： 张勇，2000/12/6


********************************************************/
/*
#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 COMM_BREAK_DETECTED		1	// A break was detected on input.
#define COMM_CTS_DETECTED		2	// The CTS (clear-to-send) signal changed state. 
#define COMM_ERR_DETECTED		4	// A line-status error occurred. Line-status errors are CE_FRAME, CE_OVERRUN, and CE_RXPARITY. 
#define COMM_RING_DETECTED		5	// A ring indicator was detected. 
#define COMM_RLSD_DETECTED		6	// The RLSD (receive-line-signal-detect) signal changed state. 
#define COMM_RXCHAR				7	// A character was received and placed in the input buffer. 
#define COMM_RXFLAG_DETECTED	8	// The event character was received and placed in the input buffer.  

#ifndef __SERIALPORT_H__
#define __SERIALPORT_H__

#include <afxwin.h>

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


//串口事件
typedef void (CALLBACK* COM_EVENT)(HWND hWnd,UINT nEvent,UINT uPort,BYTE Data);


class CSerialPort
{														 
public:
	// contruction and destruction
	CSerialPort();
	virtual ~CSerialPort();

	// port initialisation											
	BOOL		InitPort(HWND hWnd,COM_EVENT EventFunction, UINT portnr = 1, UINT baud = 19200, UINT nBufferSize = 512, char parity = 'N', UINT databits = 8, LPCTSTR stopsbits = "1", DWORD dwCommEvents = EV_RXCHAR | EV_CTS);
	COM_EVENT	Com_Event;
	void		WriteToPort(PVOID string,int len);
	// start/stop comm watching
	BOOL		StartMonitoring();
	BOOL		RestartMonitoring();
	BOOL		StopMonitoring();		//暂停止

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

	UINT				m_nPortNr;


protected:
	int iWriteLen;
	// 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_hShutdownEvent;
	HANDLE				m_hComm;
	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;
	DCB					m_dcb;

	// owner window
//	CWnd*				m_pOwner;
	HWND m_hWnd;
	// misc
	PBYTE				m_szWriteBuffer;
	DWORD				m_dwCommEvents;
	DWORD				m_nWriteBufferSize;
};

#endif __SERIALPORT_H__