/*
**	FILENAME			CSerialPort.cpp
**
**	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
**
**
*/

#include?“stdafx.h“
#include?“SerialPort.h“

#include?
?
//
//?Constructor
//
CSerialPort::CSerialPort（）
{
	m_hComm?=?NULL;

	//?initialize?overlapped?structure?members?to?zero
	m_ov.Offset?=?0;
	m_ov.OffsetHigh?=?0;

	//?create?events
	m_ov.hEvent?=?NULL;
	m_hWriteEvent?=?NULL;
	m_hShutdownEvent?=?NULL;

	m_szWriteBuffer?=?NULL;

	m_bThreadAlive?=?FALSE;
}

//
//?Delete?dynamic?memory
//
CSerialPort::~CSerialPort（）
{
	do
	{
		SetEvent（m_hShutdownEvent）;
	}?while?（m_bThreadAlive）;

	TRACE（“Thread?ended\n“）;

	delete?[]?m_szWriteBuffer;
}

//
//?Initialize?the?port.?This?can?be?port?1?to?4.
//
BOOL?CSerialPort::InitPort（CWnd*?pPortOwner	//?the?owner?（CWnd）?of?the?port?（receives?message）
						???UINT??portnr		//?portnumber?（1..4）
						???UINT??baud			//?baudrate
						???char??parity		//?parity?
						???UINT??databits		//?databits?
						???UINT??stopbits		//?stopbits?
						???DWORD?dwCommEvents	//?EV_RXCHAR?EV_CTS?etc
						???UINT??writebuffersize）	//?size?to?the?writebuffer
{
	assert（portnr?>?0?&&?portnr?	assert（pPortOwner?!=?NULL）;

	//?if?the?thread?is?alive:?Kill
	if?（m_bThreadAlive）
	{
		do
		{
			SetEvent（m_hShutdownEvent）;
		}?while?（m_bThreadAlive）;
		TRACE（“Thread?ended\n“）;
	}

	//?create?events
	if?（m_ov.hEvent?!=?NULL）
		ResetEvent（m_ov.hEvent）;
	m_ov.hEvent?=?CreateEvent（NULL?TRUE?FALSE?NULL）;

	if?（m_hWriteEvent?!=?NULL）
		ResetEvent（m_hWriteEvent）;
	m_hWriteEvent?=?CreateEvent（NULL?TRUE?FALSE?NULL）;
	
	if?（m_hShutdownEvent?!=?NULL）
		ResetEvent（m_hShutdownEvent）;
	m_hShutdownEvent?=?CreateEvent（NULL?TRUE?FALSE?NULL）;

	//?initialize?the?event?objects
	m_hEventArray[0]?=?m_hShutdownEvent;	//?highest?priority
	m_hEventArray[1]?=?m_ov.hEvent;
	m_hEventArray[2]?=?m_hWriteEvent;

	//?initialize?critical?section
	InitializeCriticalSection（&m_csCommunicationSync）;
	
	//?set?buffersize?for?writing?and?save?the?owner
	m_pOwner?=?pPortOwner;

	if?（m_szWriteBuffer?!=?NULL）
		delete?[]?m_szWriteBuffer;
	m_szWriteBuffer?=?new?char[writebuffersize];

	m_nPortNr?=?portnr;

	m_nWriteBufferSize?=?writebuffersize;
	m_dwCommEvents?=?dwCommEvents;

	BOOL?bResult?=?FALSE;
	char?*szPort?=?new?char[50];
	char?*szBaud?=?new?char[50];

	//?now?it?critical!
	EnterCriticalSection（&m_csCommunicationSync）;

	//?if?the?port?is?already?opened:?close?it
	if?（m_hComm?!=?NULL）
	{
		CloseHandle（m_hComm）;
		m_hComm?=?NULL;
	}

	//?prepare?port?strings
	sprintf（szPort?“COM%d“?portnr）;
	sprintf（szBaud?“baud=%d?parity=%

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3182??2011-08-08?16:13??CSerialPort.h

?????文件??????17641??2011-08-08?16:12??SerialPort.cpp

-----------?---------??----------?-----??----

????????????????20823????????????????????2