通信网络设计课程设计-利用MSCOMM串口通信控件进行异步串行通信的VC程序设计.doc

通信网络设计课程设计（w7）： 利用mscomm串口通信控件进行异步串行通信的vc程序设计设计日期20081229 -20090110 利用mscomm串口通信控件进行异步串行通信的vc程序设计一 课程设计题目 利用mscomm串口通信控件进行异步串行通信的vc程序设计二 课程设计要求 环境要求：windows95/98/2000/xp功能要求：能将键盘上输入的数据发送到另一台计算机上； 能将接收到的数据显示到屏幕窗口内；了解常用通信网络设备的操作和应用，掌握常用的通信协议的工作原理，能利用visual c+、开发工具完成相应的通信程序的设计工作。学习简明地介绍自己的设计工作。三 课程设计目的 用visual c+编程工具主机提供的接口，解决网络用户之间的交互式对话问题。进一步深入掌握网络设计和通信程序的设计原理。使学生对计算机通信网络的设计实现有较深的了解，培养较高的通信网络设计能力。四 程序思路硬件连接方面：数据的发送和接收由软件控制，不进行硬件握手，其连接方法如图真正需要互相连接的是rxd、txd和gnd；软件方面：串行端口的本质功能是作为cpu和串行设备间的编码转换器。当数据从 cpu经过串行端口发送出去时，字节数据转换为串行的位。在接收数据时，串行的位被转换为字节数据在windows环境（windows nt、win98、windows2000）下，串口是系统资源的一部分。应用程序要使用串口进行通信，必须在使用之前向操作系统提出资源申请要求（打开串口），通信完成后必须释放资源（关闭串口）。vc+ 6.0提供的mscomm控件通过串行端口发送和接收数据，为应用程序提供串行通信功能。使用非常方便。在当前的workspace中插入mscomm控件。 project菜单-add to project-components and controls-registered activex controls-选择components: microsoft communications control, version 6.0 插入到当前的workspace中。 结果添加了类cmscomm(及相应文件：mscomm.h和mscomm.cpp )。在mscomm.h中加入mscomm控件。protected: 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.打开并初始化串口void ccomdlg:onopencom() if(m_com.getportopen() /打开通信端口m_com.setportopen(false);m_com.setcommport(1); /选择com1if( !m_com.getportopen()m_com.setportopen(true);/打开串口messagebox(串口已经打开);elsemessagebox(不能打开串口！);m_com.setsettings(9600,n,8,1); /波特率9600，无校验，8个数据位，1个停止位 /以字符串的形式设置并返回波特率、奇偶校验、数据位、停止位m_com.setinputmode(1); / 定义input属性获取数据的方式（为0：文本方式；为1：二进制方式）。m_com.setrthreshold(1); /为1表示有一个字符引发一个事件m_com.setinputlen(0); /设置每次input读入的字符个数，缺省值为0，表明读取接收缓冲区中的全部内容m_com.getinput();m_opened=true;捕捉串口事项。mscomm控件可以采用轮询或事件驱动的方法从端口获取数据。我们介绍比较使用的事件驱动方法：有事件（如接收到数据）时通知程序。在程序中需要捕获并处理这些通讯事件。在mainfrm.h中：protected:afx_msg void oncommmscomm();declare_eventsink_map()在comdlg.cpp中：begin_eventsink_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控件串口读写.完成读写的函数的确很简单，getinput()和setoutput()就可。两个函数的原型是：variant getinput()；及 void setoutput(const variant& newvalue);都要使用variant类型（所有idispatch:invoke的参数和返回值在内部都是作为variant对象处理的）。无论是在pc机读取上传数据时还是在pc机发送下行命令时，我们都习惯于使用字符串的形式（也可以说是数组形式）。查阅variant文档知道，可以用bstr表示字符串，但遗憾的是所有的bstr都是包含宽字符，即使我们没有定义_unicode_unicode也是这样！ winnt支持宽字符, 而win95并不支持。为解决上述问题，我们在实际工作中使用cbytearray，给出相应的部分程序如下：void ccomdlg:oncomm() / todo: add your control notification handler 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(idr_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_opencom, 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(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, (wparam) 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()return (hcursor) m_hicon;void ccomdlg:onopencom() if(m_com.getportopen() /打开通信端口m_com.setportopen(false);m_com.setcommport(1); /选择com1if( !m_com.getportopen()m_com.setportopen(true);/打开串口messagebox(串口已经打开);elsemessagebox(不能打开串口！);m_com.setsettings(9600,n,8,1);m_com.setinputmode(1); m_com.setrthreshold(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; 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);elsemessagebox(不能发空数据);elsemessagebox(请打开串口);mscomm.cpp#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, bnewvalue);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 result;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_propertyget, 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, null);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: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)static 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;invokehelper(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_propertyput, 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, bnewvalue);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 result;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, dispatch_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, (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);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 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:setrthreshold(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 parms =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(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_propertyput, 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, 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);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:getcommevent()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, 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, (void*)&result, null);return result;/ stdafx.cpp :#include stdafx.h/ com.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 file 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 _msc_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 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 : 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* pparentwnd, 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) retur