通信網(wǎng)絡設計課程設計-利用MSCOMM串口通信控件進行異步串行通信的VC程序設計

1、利用MSCOMM串口通信控件進行異步串行通信的VC程序設計一 課程設計題目 利用MSCOMM串口通信控件進行異步串行通信的VC程序設計二 課程設計要求 環(huán)境要求：Windows95/98/2000/XP功能要求：能將鍵盤上輸入的數(shù)據(jù)發(fā)送到另一臺計算機上； 能將接收到的數(shù)據(jù)顯示到屏幕窗口內(nèi)；了解常用通信網(wǎng)絡設備的操作和應用，掌握常用的通信協(xié)議的工作原理，能利用Visual C+、開發(fā)工具完成相應的通信程序的設計工作。學習簡明地介紹自己的設計工作。三 課程設計目的 用Visual C+編程工具主機提供的接口，解決網(wǎng)絡用戶之間的交互式對話問題。進一步深入掌握網(wǎng)絡設計和通信程序的設計原理。使學生對計算

2、機通信網(wǎng)絡的設計實現(xiàn)有較深的了解，培養(yǎng)較高的通信網(wǎng)絡設計能力。四 程序思路硬件連接方面：數(shù)據(jù)的發(fā)送和接收由軟件控制，不進行硬件握手，其連接方法如圖真正需要互相連接的是RXD、TXD和GND；軟件方面：串行端口的本質(zhì)功能是作為CPU和串行設備間的編碼轉(zhuǎn)換器。當數(shù)據(jù)從 CPU經(jīng)過串行端口發(fā)送出去時，字節(jié)數(shù)據(jù)轉(zhuǎn)換為串行的位。在接收數(shù)據(jù)時，串行的位被轉(zhuǎn)換為字節(jié)數(shù)據(jù)在Windows環(huán)境（Windows NT、Win98、Windows2000）下，串口是系統(tǒng)資源的一部分。應用程序要使用串口進行通信，必須在使用之前向操作系統(tǒng)提出資源申請要求（打開串口），通信完成后必須釋放資源（關閉串口）。VC+ 6.0提

3、供的MSComm控件通過串行端口發(fā)送和接收數(shù)據(jù)，為應用程序提供串行通信功能。使用非常方便。在當前的Workspace中插入MSComm控件。 Project菜單-Add to Project-Components and Controls-Registered ActiveX Controls-選擇Components: Microsoft Communications Control, version 6.0 插入到當前的Workspace中。 結(jié)果添加了類CMSComm(及相應文件：mscomm.h和mscomm.cpp )。在mscomm.h中加入MSComm控件。protected:

4、CMSComm m_ComPort;在mscomm.cpp:OnCreare()中：DWORD style=WS_VISIBLE|WS_CHILD; if (!m_ComPort.Create(NULL,style,CRect(0,0,0,0),this,ID_COMMCTRL)TRACE0(Failed to create OLE Communications Controln);return -1; / fail to create.打開并初始化串口void CComDlg:OnOpencom() if(m_Com.GetPortOpen() /打開通信端口m_Com.SetPortOpe

5、n(FALSE);m_Com.SetCommPort(1); /選擇com1if( !m_Com.GetPortOpen()m_Com.SetPortOpen(TRUE);/打開串口MessageBox(串口已經(jīng)打開);elseMessageBox(不能打開串口！);m_Com.SetSettings(9600,n,8,1); /波特率9600，無校驗，8個數(shù)據(jù)位，1個停止位 /以字符串的形式設置并返回波特率、奇偶校驗、數(shù)據(jù)位、停止位m_Com.SetInputMode(1); / 定義Input屬性獲取數(shù)據(jù)的方式（為0：文本方式；為1：二進制方式）。m_Com.SetRThreshold(1

6、); /為1表示有一個字符引發(fā)一個事件m_Com.SetInputLen(0); /設置每次Input讀入的字符個數(shù)，缺省值為0，表明讀取接收緩沖區(qū)中的全部內(nèi)容m_Com.GetInput();m_opened=TRUE;捕捉串口事項。MSComm控件可以采用輪詢或事件驅(qū)動的方法從端口獲取數(shù)據(jù)。我們介紹比較使用的事件驅(qū)動方法：有事件（如接收到數(shù)據(jù)）時通知程序。在程序中需要捕獲并處理這些通訊事件。在MainFrm.h中：protected:afx_msg void OnCommMscomm();DECLARE_EVENTSINK_MAP()在ComDlg.cpp中：BEGIN_EVENTSINK

7、_MAP(CComDlg, CDialog) /AFX_EVENTSINK_MAP(CComDlg)ON_EVENT(CComDlg, IDC_MSCOMM2, 1 /* OnComm */, OnComm, VTS_NONE)/AFX_EVENTSINK_MAPEND_EVENTSINK_MAP() / 映射ActiveX控件串口讀寫.完成讀寫的函數(shù)的確很簡單，GetInput()和SetOutput()就可。兩個函數(shù)的原型是：VARIANT GetInput()；及 void SetOutput(const VARIANT& newValue);都要使用VARIANT類型（所有Idispa

8、tch:Invoke的參數(shù)和返回值在內(nèi)部都是作為VARIANT對象處理的）。無論是在PC機讀取上傳數(shù)據(jù)時還是在PC機發(fā)送下行命令時，我們都習慣于使用字符串的形式（也可以說是數(shù)組形式）。查閱VARIANT文檔知道，可以用BSTR表示字符串，但遺憾的是所有的BSTR都是包含寬字符，即使我們沒有定義_UNICODE_UNICODE也是這樣！ WinNT支持寬字符, 而Win95并不支持。為解決上述問題，我們在實際工作中使用CbyteArray，給出相應的部分程序如下：void CComDlg:OnComm() / TODO: Add your control notification handler

9、 code hereVARIANT variant_inp; COleSafeArray safearray_inp; LONG len,k; BYTE rxdata2048; CString strtemp; if(m_Com.GetCommEvent()=2) variant_inp=m_Com.GetInput(); safearray_inp=variant_inp; len=safearray_inp.GetOneDimSize(); for(k=0;klen;k+) safearray_inp.GetElement(&k,rxdata+k); for(k=0;kLoadIcon(I

10、DR_MAINFRAME);void CComDlg:DoDataExchange(CDataExchange* pDX)CDialog:DoDataExchange(pDX);DDX_Control(pDX, IDC_MSCOMM2, m_Com);DDX_Text(pDX, IDC_RECV, m_recv);DDX_Text(pDX, IDC_SEND, m_send);BEGIN_MESSAGE_MAP(CComDlg, CDialog)ON_WM_SYSCOMMAND()ON_WM_PAINT()ON_WM_QUERYDRAGICON()ON_BN_CLICKED(IDC_OPENC

11、OM, OnOpencom)ON_BN_CLICKED(IDC_ONSEND, OnOnsend)END_MESSAGE_MAP()/ CComDlg message handlersBOOL CComDlg:OnInitDialog()CDialog:OnInitDialog();ASSERT(IDM_ABOUTBOX & 0xFFF0) = IDM_ABOUTBOX);ASSERT(IDM_ABOUTBOX AppendMenu(MF_SEPARATOR);pSysMenu-AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);SetIcon(

12、m_hIcon, TRUE);SetIcon(m_hIcon, FALSE);return TRUE; void CComDlg:OnSysCommand(UINT nID, LPARAM lParam)if (nID & 0xFFF0) = IDM_ABOUTBOX)CAboutDlg dlgAbout;dlgAbout.DoModal();elseCDialog:OnSysCommand(nID, lParam);void CComDlg:OnPaint() if (IsIconic()CPaintDC dc(this);SendMessage(WM_ICONERASEBKGND, (WP

13、ARAM) dc.GetSafeHdc(), 0)int cxIcon = GetSystemMetrics(SM_CXICON);int cyIcon = GetSystemMetrics(SM_CYICON);CRect rect;GetClientRect(&rect);int x = (rect.Width() - cxIcon + 1) / 2;int y = (rect.Height() - cyIcon + 1) / 2;dc.DrawIcon(x, y, m_hIcon);elseCDialog:OnPaint();HCURSOR CComDlg:OnQueryDragIcon

14、()return (HCURSOR) m_hIcon;void CComDlg:OnOpencom() if(m_Com.GetPortOpen() /打開通信端口m_Com.SetPortOpen(FALSE);m_Com.SetCommPort(1); /選擇com1if( !m_Com.GetPortOpen()m_Com.SetPortOpen(TRUE);/打開串口MessageBox(串口已經(jīng)打開);elseMessageBox(不能打開串口！);m_Com.SetSettings(9600,n,8,1);m_Com.SetInputMode(1); m_Com.SetRThres

15、hold(1); m_Com.SetInputLen(0); m_Com.GetInput();m_opened=TRUE;BEGIN_EVENTSINK_MAP(CComDlg, CDialog)ON_EVENT(CComDlg, IDC_MSCOMM2, 1 /* OnComm */, OnComm, VTS_NONE)END_EVENTSINK_MAP()void CComDlg:OnComm() VARIANT variant_inp; COleSafeArray safearray_inp; LONG len,k; BYTE rxdata2048; CString strtemp;

16、if(m_Com.GetCommEvent()=2) variant_inp=m_Com.GetInput(); safearray_inp=variant_inp; len=safearray_inp.GetOneDimSize(); for(k=0;klen;k+) safearray_inp.GetElement(&k,rxdata+k); for(k=0;kGetWindowText(m_send);if(m_send!=) UpdateData(TRUE);m_Com.SetOutput(COleVariant(m_send);m_send= ;UpdateData(FALSE);e

17、lseMessageBox(不能發(fā)空數(shù)據(jù));elseMessageBox(請打開串口);M#include stdafx.h#include mscomm.h/ CMSCommIMPLEMENT_DYNCREATE(CMSComm, CWnd)/ CMSComm properties/ CMSComm operationsvoid CMSComm:SetCDHolding(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0x1, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, bNewVa

18、lue);BOOL CMSComm:GetCDHolding()BOOL result;InvokeHelper(0x1, DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:SetCommID(long nNewValue)static BYTE parms =VTS_I4;InvokeHelper(0x3, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);long CMSComm:GetCommID()long resu

19、lt;InvokeHelper(0x3, DISPATCH_PROPERTYGET, VT_I4, (void*)&result, NULL);return result;void CMSComm:SetCommPort(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0x4, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetCommPort()short result;InvokeHelper(0x4, DISPATCH_PROPER

20、TYGET, VT_I2, (void*)&result, NULL);return result;void CMSComm:SetCTSHolding(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0x5, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms,bNewValue);BOOL CMSComm:GetCTSHolding()BOOL result;InvokeHelper(0x5, DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NU

21、LL);return result;void CMSComm:SetDSRHolding(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0x7, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, bNewValue);BOOL CMSComm:GetDSRHolding()BOOL result;InvokeHelper(0x7, DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:

22、SetDTREnable(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0x9, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms,bNewValue);BOOL CMSComm:GetDTREnable()BOOL result;InvokeHelper(0x9, DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:SetHandshaking(long nNewValue)stat

23、ic BYTE parms =VTS_I4;InvokeHelper(0xa, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);long CMSComm:GetHandshaking()long result;InvokeHelper(0xa, DISPATCH_PROPERTYGET, VT_I4, (void*)&result, NULL);return result;void CMSComm:SetInBufferSize(short nNewValue)static BYTE parms =VTS_I2;InvokeHel

24、per(0xb, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetInBufferSize()short result;InvokeHelper(0xb, DISPATCH_PROPERTYGET, VT_I2, (void*)&result, NULL);return result;void CMSComm:SetInBufferCount(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0xc, DISPATCH_PROPERTYP

25、UT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetInBufferCount()short result;InvokeHelper(0xc, DISPATCH_PROPERTYGET, VT_I2, (void*)&result, NULL);return result;void CMSComm:SetBreak(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0xd, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, bNewVa

26、lue);BOOL CMSComm:GetBreak()BOOL result;InvokeHelper(0xd, DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:SetInputLen(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0xe, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetInputLen()short r

27、esult;InvokeHelper(0xe, DISPATCH_PROPERTYGET, VT_I2, (void*)&result, NULL);return result;void CMSComm:SetNullDiscard(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0x10, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, bNewValue);BOOL CMSComm:GetNullDiscard()BOOL result;InvokeHelper(0x10, DISPA

28、TCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:SetOutBufferSize(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0x11, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetOutBufferSize()short result;InvokeHelper(0x11, DISPATCH_PROPERTYGET, VT_I2

29、, (void*)&result, NULL);return result;void CMSComm:SetOutBufferCount(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0x12, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetOutBufferCount()short result;InvokeHelper(0x12, DISPATCH_PROPERTYGET, VT_I2, (void*)&result, NULL

30、);return result;void CMSComm:SetParityReplace(LPCTSTR lpszNewValue)static BYTE parms =VTS_BSTR;InvokeHelper(0x13, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, lpszNewValue);CString CMSComm:GetParityReplace()CString result;InvokeHelper(0x13, DISPATCH_PROPERTYGET, VT_BSTR, (void*)&result, NULL);return

31、 result;void CMSComm:SetPortOpen(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0x14, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, bNewValue);BOOL CMSComm:GetPortOpen()BOOL result;InvokeHelper(0x14, DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:SetRThreshol

32、d(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0x15, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetRThreshold()short result;InvokeHelper(0x15, DISPATCH_PROPERTYGET, VT_I2, (void*)&result, NULL);return result;void CMSComm:SetRTSEnable(BOOL bNewValue)static BYTE pa

33、rms =VTS_BOOL;InvokeHelper(0x16, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, bNewValue);BOOL CMSComm:GetRTSEnable()BOOL result;InvokeHelper(0x16, DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:SetSettings(LPCTSTR lpszNewValue)static BYTE parms =VTS_BSTR;InvokeHelper

34、(0x17, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, lpszNewValue);CString CMSComm:GetSettings()CString result;InvokeHelper(0x17, DISPATCH_PROPERTYGET, VT_BSTR, (void*)&result, NULL);return result;void CMSComm:SetSThreshold(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0x18, DISPATCH_PROPERT

35、YPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetSThreshold()short result;InvokeHelper(0x18, DISPATCH_PROPERTYGET, VT_I2, (void*)&result, NULL);return result;void CMSComm:SetOutput(const VARIANT& newValue)static BYTE parms =VTS_VARIANT;InvokeHelper(0x19, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL,

36、 parms, &newValue);VARIANT CMSComm:GetOutput()VARIANT result;InvokeHelper(0x19, DISPATCH_PROPERTYGET, VT_VARIANT, (void*)&result, NULL);return result;void CMSComm:SetInput(const VARIANT& newValue)static BYTE parms =VTS_VARIANT;InvokeHelper(0x1a, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, &newValue

37、);VARIANT CMSComm:GetInput()VARIANT result;InvokeHelper(0x1a, DISPATCH_PROPERTYGET, VT_VARIANT, (void*)&result, NULL);return result;void CMSComm:SetCommEvent(short nNewValue)static BYTE parms =VTS_I2;InvokeHelper(0x1b, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);short CMSComm:GetCommEven

38、t()short result;InvokeHelper(0x1b, DISPATCH_PROPERTYGET, VT_I2, (void*)&result, NULL);return result;void CMSComm:SetEOFEnable(BOOL bNewValue)static BYTE parms =VTS_BOOL;InvokeHelper(0x1c, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms,bNewValue);BOOL CMSComm:GetEOFEnable()BOOL result;InvokeHelper(0x1c,

39、 DISPATCH_PROPERTYGET, VT_BOOL, (void*)&result, NULL);return result;void CMSComm:SetInputMode(long nNewValue)static BYTE parms =VTS_I4;InvokeHelper(0x1d, DISPATCH_PROPERTYPUT, VT_EMPTY, NULL, parms, nNewValue);long CMSComm:GetInputMode()long result;InvokeHelper(0x1d, DISPATCH_PROPERTYGET, VT_I4, (vo

40、id*)&result, NULL);return result;/ stdafx.cpp :#include stdafx.h#if !defined(AFX_COM_H_CC3DE67A_A6D3_4E95_B3A1_21B971A17C64_INCLUDED_)#define AFX_COM_H_CC3DE67A_A6D3_4E95_B3A1_21B971A17C64_INCLUDED_#if _MSC_VER 1000#pragma once#endif#ifndef _AFXWIN_H_#error include stdafx.h before including this fil

41、e for PCH#endif#include resource.h/ CComApp:class CComApp : public CWinApppublic:CComApp();public:virtual BOOL InitInstance();DECLARE_MESSAGE_MAP();#endif#if !defined(AFX_COMDLG_H_2C5D9F44_AB0A_4501_A2B7_7BCA6EAB1B92_INCLUDED_)#define AFX_COMDLG_H_2C5D9F44_AB0A_4501_A2B7_7BCA6EAB1B92_INCLUDED_#if _M

42、SC_VER 1000#pragma once#endif / _MSC_VER 1000/ CComDlg dialogclass CComDlg : public CDialogpublic:BOOL m_opened;CComDlg(CWnd* pParent = NULL); enum IDD = IDD_COM_DIALOG ;CMSCommm_Com;CStringm_recv;CStringm_send;protected:virtual void DoDataExchange(CDataExchange* pDX);protected:HICON m_hIcon;virtual

43、 BOOL OnInitDialog();afx_msg void OnSysCommand(UINT nID, LPARAM lParam);afx_msg void OnPaint();afx_msg HCURSOR OnQueryDragIcon();afx_msg void OnOpencom();afx_msg void OnComm();afx_msg void OnOnsend();DECLARE_EVENTSINK_MAP()DECLARE_MESSAGE_MAP();#endif#if _MSC_VER 1000#pragma once#endifclass CMSComm

44、: public CWndprotected:DECLARE_DYNCREATE(CMSComm)public:CLSID const& GetClsid()static CLSID const clsid= 0x648a5600, 0x2c6e, 0x101b, 0x82, 0xb6, 0x0, 0x0, 0x0, 0x0, 0x0, 0x14 ;return clsid;virtual BOOL Create(LPCTSTR lpszClassName,LPCTSTR lpszWindowName, DWORD dwStyle,const RECT& rect,CWnd* pParentW

45、nd, UINT nID,CCreateContext* pContext = NULL) return CreateControl(GetClsid(), lpszWindowName, dwStyle, rect, pParentWnd, nID); BOOL Create(LPCTSTR lpszWindowName, DWORD dwStyle,const RECT& rect, CWnd* pParentWnd, UINT nID,CFile* pPersist = NULL, BOOL bStorage = FALSE,BSTR bstrLicKey = NULL) return CreateControl(GetClsid(), lpszWindowName, dwStyle, rect, pParentWnd, nID,pPersist, bStor