/*
**	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?

int?m_nComArray[20];
//
//?Constructor
//
CSerialPort::CSerialPort（）///構造函數
{
	m_hComm?=?NULL;
	//?initialize?overlapped?structure?members?to?zero
	///初始化異步結構體
	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;

	m_nWriteSize=1;///
	m_bIsSuspened?=?FALSE;///
}

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

	
	//?if?the?port?is?still?opened:?close?it?
	if?（m_hComm?!=?NULL）
	{
		CloseHandle（m_hComm）;
		m_hComm?=?NULL;
	}
	//?Close?Handles??
	if（m_hShutdownEvent!=NULL）
		CloseHandle（?m_hShutdownEvent）;?
	if（m_ov.hEvent!=NULL）
		CloseHandle（?m_ov.hEvent?）;?
	if（m_hWriteEvent!=NULL）
		CloseHandle（?m_hWriteEvent?）;?

	TRACE（“Thread?ended\n“）;
	delete?[]?m_szWriteBuffer;
}

//
//?Initialize?the?port.?This?can?be?port?1?to?MaxSerialPortNum.
///初始化串口。只能是1-MaxSerialPortNum
//
BOOL?CSerialPort::InitPort（CWnd*?pPortOwner	//?the?owner?（CWnd）?of?the?port?（receives?message）
						???UINT??portnr		//?portnumber?（1..MaxSerialPortNum）
						???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
	///如果線程存在，則關掉進程
	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）;
	else
		m_ov.hEvent?=?CreateEvent（NULL?TRUE?FALSE?NULL）;

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

	//?initialize?the?event?objects
	///事件數組初始化，設定優先級別
	m_hEventArray[0]?=?m_hShutdownEvent;	//?highest?priority
	m_hEventArray[1]?=?m_ov.hEvent;
	m_hEventArray[2]?=?m_hWriteEvent;

	//?initialize?critical?section
	///初始化臨界資源
	InitializeCriticalSection（&m_csCommunicationSync）;
	
	//?set?buffersize?for?writing?and?save?the?owner
	m_pOwner?=