terminaldoc.cpp

Terminal 终端仿真程序

// TerminalDoc.cpp : implementation of the CTerminalDoc class
//

#include "stdafx.h"
#include "Terminal.h"

#include "TerminalDoc.h"
#include "SetupDlg.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CTerminalDoc

IMPLEMENT_DYNCREATE(CTerminalDoc, CDocument)

BEGIN_MESSAGE_MAP(CTerminalDoc, CDocument)
	//{{AFX_MSG_MAP(CTerminalDoc)
	ON_COMMAND(ID_FILE_SETTINGS, OnFileSettings)
	ON_COMMAND(ID_FILE_CONNECT, OnFileConnect)
	ON_COMMAND(ID_FILE_DISCONNECT, OnFileDisconnect)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CTerminalDoc construction/destruction

CTerminalDoc::CTerminalDoc()
{
	// TODO: add one-time construction code here
	m_bConnected=FALSE;
	m_pThread = NULL;
	m_nBaud=9600;
	m_nDataBits=8;
	m_bEcho=FALSE;
	m_nFlowCtrl=0;
	m_bNewLine=FALSE;
	m_nParity=0;
	m_sPort="COM2";
	m_nStopBits=0;
}

CTerminalDoc::~CTerminalDoc()
{
	if(m_bConnected)
		CloseConnection();
	if(m_hPostMsgEvent)
		CloseHandle(m_hPostMsgEvent);
	if(m_osRead.hEvent)
		CloseHandle(m_osRead.hEvent);
	if(m_osWrite.hEvent)
		CloseHandle(m_osWrite.hEvent);
}

BOOL CTerminalDoc::OnNewDocument()
{
	if (!CDocument::OnNewDocument())
		return FALSE;

	((CEditView*)m_viewList.GetHead())->SetWindowText(NULL);

	// TODO: add reinitialization code here
	// (SDI documents will reuse this document)
	if((m_hPostMsgEvent=CreateEvent(NULL,TRUE,TRUE,NULL))==NULL)
		return FALSE;
	memset(&m_osRead,0,sizeof(OVERLAPPED));
	memset(&m_osWrite,0,sizeof(OVERLAPPED));
	if((m_osRead.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL))=NULL)
		return FALSE;
	if((m_osWrite.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL))=NULL)
		return FALSE;	
}



/////////////////////////////////////////////////////////////////////////////
// CTerminalDoc serialization

void CTerminalDoc::Serialize(CArchive& ar)
{
	// CEditView contains an edit control which handles all serialization
	((CEditView*)m_viewList.GetHead())->SerializeRaw(ar);
}

/////////////////////////////////////////////////////////////////////////////
// CTerminalDoc diagnostics

#ifdef _DEBUG
void CTerminalDoc::AssertValid() const
{
	CDocument::AssertValid();
}

void CTerminalDoc::Dump(CDumpContext& dc) const
{
	CDocument::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CTerminalDoc commands

void CTerminalDoc::OnFileSettings() 
{
	// TODO: Add your command handler code here
	CSetupDlg dlg;
	CString str;
	dlg.m_bConnected=m_bConnected;
	dlg.m_sPort=m_sPort;
	str.Format("%d",m_nBaud);
	dlg.m_sBaud=str;
	str.Format("%d",m_nDataBits);
	dlg.m_sDataBits=str;
	str.Format("%d",m_nParity);
	dlg.m_nParity = m_nParity;
	str.Format("%d",m_nStopBits);
	dlg.m_nStopBits=m_nStopBits;
	str.Format("%d",m_nFlowCtrl);
	dlg.m_nFlowCtrl=m_nFlowCtrl;
	dlg.m_bNewLine=m_bNewLine;
	dlg.m_bEcho=m_bEcho;
	if(dlg.DoModal()==IDOK)
	{
		m_sPort = dlg.m_sPort;
		m_nBaud = atoi(dlg.m_sBaud);
		m_nDataBits=atoi(dlg.m_sDataBits);
		m_nParity=dlg.m_nParity;
		m_nStopBits=dlg.m_nStopBits;
		m_nFlowCtrl=dlg.m_nFlowCtrl;
		m_bEcho=dlg.m_bEcho;
		m_bNewLine=dlg.m_bNewLine;
		if(m_bConnected)
			if(!ConfigConnection())
				AfxMessageBox("Can't realize the settings!");
	}
}

void CTerminalDoc::OnFileConnect() 
{
	// TODO: Add your command handler code here
	if(!OpenConnection())
		AfxMessageBox("Can't open connection");
//	return TRUE;
}

void CTerminalDoc::OnFileDisconnect() 
{
	// TODO: Add your command handler code here
	CloseConnection();
}

BOOL CTerminalDoc::CanCloseFrame(CFrameWnd* pFrame) 
{
	// TODO: Add your specialized code here and/or call the base class
	SetModifiedFlag(FALSE);
	return CDocument::CanCloseFrame(pFrame);
}

BOOL CTerminalDoc::ConfigConnection()
{
	DCB dcb;
	if(!GetCommState(m_hCom,&dcb))
		return FALSE;
	dcb.fBinary=TRUE;
	dcb.BaudRate=m_nBaud;
	dcb.ByteSize=m_nDataBits;
	dcb.fParity=TRUE;
	switch(m_nParity)
	{
	case 0:dcb.Parity=NOPARITY;
		break;
	case 1:dcb.Parity=EVENPARITY;
		break;
	case 2:dcb.Parity=ODDPARITY;
		break;
		default:;
	}
	switch(m_nStopBits)
	{
	case 0: dcb.StopBits=ONESTOPBIT;
		break;
	case 1: dcb.StopBits = ONE5STOPBITS;
		break;
	case 2: dcb.StopBits = TWOSTOPBITS;
		break;
	default:;
	}
	dcb.fOutxCtsFlow=m_nFlowCtrl==1;
	dcb.fRtsControl=m_nFlowCtrl==1?RTS_CONTROL_HANDSHAKE:RTS_CONTROL_ENABLE;
	dcb.fInX=dcb.fOutX=m_nFlowCtrl==2;
	dcb.XonChar=XON;
	dcb.XoffChar=XOFF;
	dcb.XonLim=50;
	dcb.XoffLim=50;
	return SetCommState(m_hCom,&dcb);
}
UINT CommProc(LPVOID pParam)
{
	OVERLAPPED os;
	DWORD dwMask,dwTrans;
	COMSTAT ComStat;
	DWORD dwErrorFlags;
	CTerminalDoc *pDoc=(CTerminalDoc*)pParam;
	memset(&os,0,sizeof(OVERLAPPED));
	os.hEvent=CreateEvent(NULL,TRUE,FALSE,NULL);
	if(os.hEvent=NULL)
	{
		AfxMessageBox("Can't create event object!");
		return (UINT)-1;
	}
	while(pDoc->m_bConnected)
	{
		ClearCommError(pDoc->m_hCom,&dwErrorFlags,&ComStat);
		if(ComStat.cbInQue)
		{
			WaitForSingleObject(pDoc->m_hPostMsgEvent,INFINITE);
			ResetEvent(pDoc->m_hPostMsgEvent);
			PostMessage(pDoc->m_hTermWnd,WM_COMMNOTIFY,EV_RXCHAR,0);
			continue;
		}
		dwMask = 0;
		if(!WaitCommEvent(pDoc->m_hCom,&dwMask,&os))
		{
			if(GetLastError()==ERROR_IO_PENDING)
				GetOverlappedResult(pDoc->m_hCom,&os,&dwTrans,TRUE);
			else
			{
				CloseHandle(os.hEvent);
				return (UINT)-1;
			}
		}
	}
	CloseHandle(os.hEvent);
	return 0;
}
BOOL CTerminalDoc::OpenConnection()
{
	COMMTIMEOUTS TimeOuts;
	POSITION firstViewPos;
	CView *pView;
	firstViewPos = GetFirstViewPosition();
	pView=GetNextView(firstViewPos);
	m_hTermWnd = pView->GetSafeHwnd();
	if(m_bConnected)
		return FALSE;
	m_hCom=CreateFile(m_sPort,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL|FILE_FLAG_OVERLAPPED,NULL);
	if(m_hCom == INVALID_HANDLE_VALUE)
		return FALSE;
	SetupComm(m_hCom,MAXBLOCK,MAXBLOCK);
	SetCommMask(m_hCom,EV_RXCHAR);
	TimeOuts.ReadIntervalTimeout=MAXDWORD;
	TimeOuts.ReadTotalTimeoutMultiplier=0;
	TimeOuts.ReadTotalTimeoutConstant=0;

	TimeOuts.WriteTotalTimeoutMultiplier=50;
	TimeOuts.WriteTotalTimeoutConstant=2000;
	SetCommTimeouts(m_hCom,&TimeOuts);
	if(ConfigConnection())
	{
		m_pThread=AfxBeginThread(CommProc,this,THREAD_PRIORITY_NORMAL,0,CREATE_SUSPENDED,NULL);
		if(m_pThread == NULL)
		{
			CloseHandle(m_hCom);
			return FALSE;
		}
		else
		{
			m_bConnected = TRUE;
			m_pThread->ResumeThread();
		}
	}
	else
	{
		CloseHandle(m_hCom);
		return FALSE;
	}
	return TRUE;
}

void CTerminalDoc::CloseConnection()
{
	if(!m_bConnected)
		return;
	m_bConnected=FALSE;
	SetEvent(m_hPostMsgEvent);
	SetCommMask(m_hCom,0);
	WaitForSingleObject(m_pThread->m_hThread,INFINITE);
	m_pThread = NULL;
	CloseHandle(m_hCom);
}

DWORD CTerminalDoc::ReadComm(char *buf, DWORD dwLength)
{
	DWORD length = 0;
	COMSTAT ComStat;
	DWORD dwErrorFlags;
	ClearCommError(m_hCom,&dwErrorFlags,&ComStat);
	length=min(length,ComStat.cbInQue);
	ReadFile(m_hCom,buf,length,&length,&m_osRead);
	return length;
}

DWORD CTerminalDoc::WriteComm(char *buf, DWORD dwLength)
{
	BOOL fState;
	DWORD length=dwLength;
	COMSTAT ComStat;
	DWORD dwErrorFlags;
	ClearCommError(m_hCom,&dwErrorFlags,&ComStat);
	fState=WriteFile(m_hCom,buf,length,&length,&m_osWrite);
	if(!fState)
	{
		if(GetLastError()==ERROR_IO_PENDING)
		{
			GetOverlappedResult(m_hCom,&m_osWrite,&length,TRUE);
		}
		else
			length = 0;
	}
	return length;

}