通信工程專業(yè)綜合訓練(共享)

1、通信工程專業(yè)綜合訓練數(shù)據(jù)通信系統(tǒng)的設計與實現(xiàn)姓名：張會琪學號：01250423專業(yè)：通信工程學院：計算機與通信學院學校：蘭州理工大學一、功能描述 3二、系統(tǒng)分析與設計 3三、主要技術 4四、串口通信協(xié)議設計41、幀格式 42、控制信號 53、數(shù)據(jù)分幀及數(shù)據(jù)重整54、傳輸流程 6五、原程序代碼 8六、主界面 63七、小結 63數(shù)據(jù)通信系統(tǒng)設計與實現(xiàn)一，功能描述本設計通過串口在兩臺計算機z間建立連接，按照自定義串口通 信協(xié)議進行信息交換，通過串口實現(xiàn)聊天、文件傳輸?shù)墓δ?。二，系統(tǒng)分析與設計系統(tǒng)架構方式如下圖：內(nèi)部緩沖區(qū) （接收及發(fā)送）串口通信協(xié)議cserialportex應用程序之.間數(shù)據(jù)交換接收

2、端應用程用接收端應用程用內(nèi)部緩沖區(qū)（接收及發(fā)送）串口通信協(xié)議cserialportexwin 95/nt通信底層win 95/nt通信底層pc串口串口線pc串口rr三，主要技術使用api函數(shù)法實現(xiàn)串口通信，api是附帶在windows內(nèi)部的一個極其重要的組成部分, windows系統(tǒng)為其下運行的各種開發(fā)系統(tǒng)提供的開放式通用功能增強接口，并采用界步方式來實 現(xiàn)串口通信。四，串口通信協(xié)議設計串口通信協(xié)議設計思想基于幀傳輸方式，即在向串口發(fā)送數(shù)據(jù)時是一幀一幀地發(fā)送。対于 上層應用來說，應用程序所發(fā)送的和所接收的都是流式數(shù)據(jù)，即如果應用程序需耍進行上層的協(xié) 議解釋的說，它將而對這些流數(shù)據(jù)的重新拼裝。為

3、保證可靠的傳輸，在傳輸開始前，通過握手建 立連接，在每一幀的傳輸小，采用發(fā)送/應答/更連/失敗方式。1， 幀格式此應丿ij程序使用三種幀：控制幀、數(shù)據(jù)幀、語短語幀?？刂茙c數(shù)據(jù)幀用于文件傳輸， 短語幀用于短消息發(fā)送。（1）數(shù)據(jù)幀數(shù)據(jù)幀包括幀頭、負載數(shù)據(jù)和校驗和。幀頭占6個字節(jié)，其中count表示負載數(shù)據(jù)長度（字節(jié)計算），check 1表示第二與笫三 字節(jié)的校驗和。0123450x000x00countcheck 1數(shù)據(jù)幀頭負載數(shù)據(jù)長coun（字節(jié)，最多不超過0x1000字節(jié)。 校驗和占兩個字節(jié)，是對負載數(shù)據(jù)計算校驗和的結果。（2）控制幀控制幀和控制信號合作完成通信同步與控制任務，他只是幀頭，長

4、為6字節(jié)。0123450x000x01npackcheck 1傳輸起始控制幀其中npack表示本次傳輸共發(fā)送幀數(shù)，便于讓接收方控制進度，check 1為第二與第三 字節(jié)的校驗和。當npack二check 1=0時，表示木次傳輸結束，當接收方收到該幀時，不管是否已 收到應接收幀數(shù)，都將結朿此次傳輸（計該幀為abort幀）。在沒有發(fā)牛傳輸錯誤的情況下，一 次傳輸只會出現(xiàn)兩次控制幀，第一次在傳輸開始時（計為控制首幀），第二次在傳輸結束時。（3）短語幀短語幀相對簡單，幀中負載均為文本數(shù)據(jù)。發(fā)送與接收該幀不需建立連接也沒冇錯誤 控制，只是在幀頭和幀尾插入了同步信號。0x03文本數(shù)據(jù)0x032.控制信號為

5、提高通信效率，串口通信協(xié)議使用控制信號進行通信同步、糾錯等各種控制任務。 卜而是串口通信協(xié)議定義的6種控制信號。constbytesynl=0xl;請求constbyteackl=0x2);響應constbyteresendl=0x4)； 重發(fā)constbytebusy 二0x7；忙constbytebye3=6, 0,6； /斷開連接constbytestrfl=0x3；短信息同步信號3.數(shù)據(jù)分幀及數(shù)據(jù)重組應用程序送過來的數(shù)據(jù)作為一個流按串口通信協(xié)議進行分幀，切割后為每個幀加上幀 頭和校驗和，放入串口通信協(xié)議內(nèi)部緩沖區(qū)內(nèi)準備發(fā)送；在接收端，分幀的數(shù)據(jù)去掉幀頭重新歸 到接收緩沖區(qū)流，由應用程序

6、接收。數(shù)據(jù)分幀，加幀頭、校驗和應用程序數(shù)據(jù)vvvvvvv 發(fā)送數(shù)據(jù)分幀過程校驗和數(shù)據(jù)重組過程4 傳輸流程在發(fā)送數(shù)據(jù)前，串口通信i辦議發(fā)送方將應用程序希望發(fā)送的數(shù)據(jù)進行分幀，然后按下 面的步驟進行通信。（1）握手 a.由發(fā)送端發(fā)syn信號，等待反饋。 b.接收端收到syn信號后發(fā)回ack信號。 c.發(fā)送端收到ack信號后，由發(fā)送端發(fā)出控制首幀。 d.接收端收到控制首幀后，checksum錯誤則發(fā)resend信號，然后重復步 驟cd。如果正確，發(fā)ack信號。 c.發(fā)送端收到ack信號后，轉到（2）數(shù)據(jù)傳輸?shù)牟襟Ea。（2）數(shù)據(jù)傳輸 a.由發(fā)送端發(fā)送笫i幀的幀頭，等待反饋；若發(fā)送方發(fā)現(xiàn)該幀是abort

7、幀，則 轉到（3）斷開連接的步驟a。 b.接收端收到幀頭后，幀長度校驗和錯誤則發(fā)resend信號，然后重復步驟 ab。如果正確，發(fā)ack信號。 c.若發(fā)送端收到ack信號，則發(fā)送幀中數(shù)據(jù)和校驗和。 d.接收端收到數(shù)據(jù)后，負載數(shù)據(jù)校驗和錯誤則發(fā)resend信號，然后重復步驟 cd。如果正確,發(fā)ack信號。 e.若發(fā)送端收到ack信號，則該幀數(shù)據(jù)發(fā)送成功。發(fā)送端發(fā)送syn信號，開 始下一幀的握手過程。 f.若接收端收到syn信號，則發(fā)送ack信號進行確認。 g.若發(fā)送端接收到ack信號，則重復ae步驟進行下一幀的傳輸。（3）斷開連接 a.發(fā)送方發(fā)送abort控制幀，準備結束此次通信。 b.若接收端

8、收到abort信號，則發(fā)送ack信號，準備結束此次通信。 c.若發(fā)送端收到ack信號，則發(fā)送bye控制信號。 d.若接收方收到bye信號，則拆除此次連接，同時發(fā)送ack信號。 e.發(fā)送方收到ack信號后，拆除連接。握 手 過 程傳輸流程圖五原程序代碼a斷開連接流程圖configdlg.cpp 下代碼：#includc "stdafx.h"#include "resource】"#include "configdlg.h"#ifdef .debug#define new debug.new#undcfthis_hlestatic cha

9、r this_file = _file_;#endiflllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll/ cconfigdlg dialogcconfigdlg:cconfigdlg(cwnd* pparcnt /*=null*/): cdialog(cconfigdlg:idd, pparcnt)f/afx_data_inlt(cconfigdlg) m_strbau(jrate = _t("");m_strdatabits = _t(,n);m_strparity

10、= _t("");m_strs topbits = _t("");m_strsend buffer 二 _t("");m_strcomm = _t(” com 1");/) afx_data_initicconfigdlg:cconfigdlg(cwnd* pparent, dcb deb): cdialog(cconfigdlg:idd, pparent)m_dcb = deb;cconfigdlg:cconfigdlg(cwnd* pparcnt, cscrialportex* pport): cdialog(cconf

11、igdlg:idd, pparcnt)fm_dcb = pport->getdcb();char tempi 10j;m_strcomm=_t(cstring(ncom,)+itoa(pport->m_nportnr4empj();ivoid cconfigdlg:doi)ataexchange(cdataexchange* pdx)cdialog:dodataexchange(pdx);/(afx_data_map(cconfigdlg)ddx_cbstring(pdx, idc.baudratecombo, m_strbaudratc);ddx_cbstring(pi)x, i

12、dc.databitscombo, m.strdatabits);ddx_cbstring(pdx, idc_paritycombo, m.strparity);ddx_cbstring(pdx, idc_stopbitscombo, m_strstopbits);ddx_cbstring(pdx, idc_sendbuffercombo, m_strsendbuffer);ddx_cbstring(pdx, idc.commcombo, m_strcomm)；/) afx_data_map)begin_message_map(cconfigdlg, cdialog)/afx_msg_map(

13、cconfigdlg)/) afx_msg_mapend_message_map()lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll/ cconfigdlg message handlersbool cconfigdlg:oninitdialog()fcdialog: :oninitdialog();cstring strtemp;strtemp.format(h%d, m_dcb.baudrate);(ccombobox*)getdlgitem(idc_baudratecombo)-&g

14、t;selectstring(0, strtcmp);(ccombobox*)getdlgitem(idc_paritycombo)->setcursel(m_dcb.parity);(ccombobox*)getdlgitem(idc_stopbltscombo)->setcursel(m_dcb.stopbits); strtemp.format(m%d, m_dcb.bytesize);(ccombobox*)getdlgitem(idc_databitscombo)->selectstring(), strtemp);ccombobox* pcommchoicc=(c

15、combobox*)this->gctdigitcm(idc_commcombo); switch(m_strcomm 3)case t:pcommchoice->setcursel(0);break;case 2:pcommchoice->setcursel( 1);break;case 31:pconimchoicc->sctcurscl(2);break;case 4:pcommchoice->setcursel(3);break;default:break;)return true; / return true unless you set the foc

16、us to a control/ exception: ocx property pages should return falseiconfigdlg.h下的代碼：#if !defined(afx configdlg h e8dcaf4f 5b32 11d1 94ba oo8o5a147202 included )#dcfinc afx_configdlg_h_e8dcaf4f_5b32_11 dl_94ba_00805a 147202_included_#if msc ver >= 1000#pragma once#cndif/_msc_ver >= 1000#include

17、"serialport.h"class cconfigdig : public cdialogpublic:cconfigdlg(cwnd* pparcnt = null); / standard constructorcconfigdlg(cwnd* pparent, i)cb deb);cconfigdlg(cwnd* pparent, cserialportex* pport);/afx_data(cconhgdlg)enum idd = idd_configdialog ;cstring m_strbaudratc;cstring m_strdatabits;cst

18、ring m_strparity;cstring m_slrslopbits;cstring m_strsendbuffer;cstring m_strconim;/) )afx_data/ classwizard generated virtual function overrides/afx_virtual(cconfigdlg)protected:virtual void dodataexchangc(cdataexchangc* pdx); / ddx/ddv support/) afx_virtual/ implementationprotected:dcb m_dcb;/ gene

19、rated message map functions/afx_msg(cconfigdlg)virtual bool onlnitdialogo;/)afx_msgdeclare_message_map()i；/afx_insert_location)/ microsoft developer studio will insert additional declarations immediately before the previous line#endif/ !defined(afx conf1gdlg h e8dcaf4f 5b32 11d1 94ba 00805ai47202 in

20、cluded )expandingdialog.cpp 下的代碼：#include "stdafx.h"#include <windowsx.h>#include nexpandingdialog.hh#ifdef .debug#dcfinc new debug.new#undefthis filestatic char this_file = _file_;#endiflllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll/ cexpandingdialog d

21、ialogcexpandingdialog:cexpandingdialog(uint nidtemplale,cwnd* pparent,int nidframejnt nidbutlon,lpctstr strexpand.lpctstr strcontract,int ballowcontract) :cdialog(nidtcmplatc, pparcnt)/afx_data_init(cexpandingdialog)/ note: the classwizard will add member initialization here/) afx_datanitm_strexpand

22、 = strexpand;m_strcontract = strcontract;m_nidframe = nidframe;m_nidbutton = nldbutton;m_bexpandcd = true;m_ballowcontract = ballowcontract; m_psize = null;)cexpandingdialog: :-cexpandingdialog()if(m_psize)delete m_psize;m_psize二null;i)void cexpandingdialog:dodataexchange(cdataexchange* pdx)cdialog:

23、dodataexchange(pdx);/afx_data_map(cexpandingdialog)/ note: the classwizard will add ddx and ddv calls hereafx_data_map)begin_message_map(cexpandingdialog, cdialog)/afx_msg_m ap(cexpandingdialog)/) afx_msg_mapend_message_map()/ cexpandingdialog message handlersvoid cexpandingdialog:expandbox(bool fex

24、pand)/ if the dialog is already in the requested state, return/ immediately.if (fexpand = m_bexpandcd) return;crect rcwnd, rcdefaultbox, rcchild, rcintersection;cwnd * wndchild二null;cwnd * wnddefaullbox=null;/ get the window of the buttoncwnd * pctrl = getdlgitem(m_nidbutton);if (pctrl=null) return;

25、wnddefaultbox = getdlgitem(m_nidframe);if (wnddefaultbox=null) return;/ retrieve coordinates for the default child windowwnddcfaultbox->gctwindowrcct(&icdcfaultbox);/ enable/disable all of the child window outside of the default box.wndchild = gettopwindow();for (: wndchild != null; wndchild

26、= wndchild->getwindow(gw_hwndnext) / get rectangle occupied by child window in scrccn coordinates.wndchild->getwindowrect(&rcchild);訐(!rcintersection.intersectrect(&rcchild,&icdefaul(box)wndchild->enablewindow(fexpand);i)if ("expand) / we are contracting_assert(m_bexpandcd)

27、;getwindowrect(&rcwnd);if(m_psize = null)/ this is the first time we are being called to shrink the dialog/ box the dialog box is currently in its expanded size and wc must/ save the expanded width and height so that it can be restored/ later when the dialog box is expanded m_psize = new csize;m

28、_psize->cx = rcwnd.right rcwndeft;m_psizc->cy = rcwnd.bottom rcwnd.top;/ we also hide the default box here so that it is not visible wnddefaultbox->showwindow(sw_hide);)/ shrink the dialog box so that it encompasses everything from (he lop,/ left up to and including the default box.sctwindo

29、wpos(null,0,0,rcdefaultbox.right rcwnd.left,rcdefaultbox.bottom rcwnd.top,swp_nozorderiswp_nomove);pctrl->setwindowtext(m_strexpand);/ record that the dialog is contracted. m_bexpanded = false;else / wc arc expandingf_assert( !m_bexpanded);_assert(m_psize != null);setwindowpos(null,(),(),m_psize-

30、>cx,m_psize->cy,swp_nozorderiswp_nomove);/ make sure that the entire dialog box is visible on the user's/ screen.sendmessage(dm_reposltion,0,0);if (m_ballowcontract)pctii->sctwindowtcxt(m_strcontract);)elsepctrl->enablewindow(false);i/ record that the dialog is expanded m_bexpanded =

31、 true;)void cexpandingdialog:onclickadvanccd()fexpand( !m_bexpanded);)bool cexpandingdialog:expand(bool bexpand)bool bshouldexpand;/ if the current state matches the flag passed into this/ routine, then there is no need to do anything. note that/ the virtual functions ondialogexpanding and ondialoge

32、xpanded/ arc not called.if (bexpand m_bexpanded) return true;/ call the virtual function to see if it is ok to expand the dialogbshouidexpand = ondialogexpanding(m_bexpanded);/ if ondialogexpanding returns ok (true), then call the appropriate/ functions to expand the dialog.訐(bshouidexpand)expandbox

33、(bexpand);/ set the focus to the desired controlcwnd * pctrl;pctrl = getdlgitem(m_nidbutton);if(pctrl != null) gctncxtdlgtabitcm(pctrho)->sctfocus();)/ call the notification for the post-expand ondialogexpanded(m_bexpanded);rcturn(m_bexpandcd = bexpand);)bool cexpandingdialog:ondialogexpanding(bo

34、ol /*bexpanded*/) return (true);void cexpandingdialog:ondialogexpandcd(bool /*bexpandcd*/) return;)bool cexpandingdialog:oninitdialog()cdialog:oninitdialog();/ during initialization, before any windows are shown, shrink the/ dialog box so that only the default portion is shown.expandbox(false);retur

35、n true; / return true unless you set the focus to a control/ exception: ocx property pages should return false)boolcexpandingdialog:oncommand(wparam wparam, lparam 1 param)hwnd hwndctl;int id;uint codenotify;/ crack the wm_command messageid = get_wm_command_id(wparam,lparam);hwndctl = get_wm_command

36、_hwnd(wparam,iparam);codcnotify = get_wm_command_cmd(wpaamparam);/ if the ” advanced” button was clicked, then call the/ message handle匚訐(id = m.nldbutton)&&(codenolify 二二 bn_cl1cked) onclickadvanced();return cdialog:oncommand(wparam, iparam);exandingdialog.h 卜的代碼：#if !dcfincd(afx_expandingd

37、ialog_h_cc371 ce2_1dd1_11 d2_96d3_841605c10627_included_) #define afx_expandingdi alog_h_cc371 ce2_ 1dd1 _ 11 d2_96d3_841605c10627_includei)_ #if_msc_ver >= 1000#pragma once#endif/_msc_ver >= 1000lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllii expandingdialog.h

38、: header file/ mfc expanding/contracting dialog header file/ written by daniel g hyams/dhyams or dhyams/ copyright (c) 1998./ this code may be used in compiled form in any way you desire this/ file may be redistributed unmodified by any means providing it is/ not sold for profit without the authors

39、written consent, and/ providing that this notice and the authors name and all copyright/ notices remains intact. if the source code in this file is used in/ any commercial application then a statement along the lines of/ nportions copyright (c) daniel g hyams, 1998,r must be included in/ the startup

40、 banner, naboutn box or printed documentation. an email/ letting me know that you are using it would be nice as well./this file is provided has is” with no expressed or implied warranty./ the author accepts no liability for any damage/loss of business that/ this product may cause/ please use and enj

41、oy. please let me know of any bugs/mods/improvements/ that you have found/implemented and i will fix/incorporate them into this/ file.illllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllll/ cexpandingdialog dialogclass cexpandingdialog : public cdialog/ construction and destru

42、ctionpublic:cexpandingdialog(uint nidtemplate,cwnd* pparcnt,int nidframe,int nidbutton,lpctstr strexpand = _t(nadvanced »m),lpctstr strcontract = _t(hadvanced «h),bool bailowcontract = true)；virtual -cexpandingdialogo;public:/ a public function so that the dialog can query whether or not/

43、we are in” advanced" mode bool isexpanded() const return m_bexpanded:);/ allow the user to expand or contract the dialog whenever they/ please. this is only needed in extreme circumstances, when the/ dialog should expand or contract based on something else besides/ the hadvancedh button.bool ex

44、pand(bool bexpand);/ a virtual notification function so that the expanding or contracting/ can be aborted if need be. the function should return true 訐 the/ expanding should happen, or false if it should not.virtual bool ondialogexpanding(bool bexpanded);/ a virtual notification function that is cal

45、led after the expansion/ lakes placevirtual void ondialogexpanded(bool bexpanded);/ dialog data/afx_data(cexpandingdialog)/ note: the classwizard will add data members here/)afx_data/ ovenides/ classwizard generated virtual function overrides/afx_virtu al(cexpandingdialog)protected:virtual void doda

46、taexchange(cdataexchange* pdx); / ddx/ddv support virtual bool oncommand(wparam wparam, lparam 1 param);afx_virtual/ implementationprotected:/ generated message map functions/(afx_msg(cexpandingdialog)virtual bool onlnitdialogo;/)afx_msgdeclare_message_map()private:/ property datacstring m_strexpand

47、; / string to put on the cxpand/contract button, when/ the dialog is currently contractedcstring m_strcontract; / string to pu on the expand/contract button, when/ the dialog is currently expandedint m_nidframe;/ resource id of the frame that defines the contracted/ dimcnsions of the m_ni

48、dbutton;/ resource id of the expand/contract button on the/ dialogbool m_bahowcontract;/ whether or not to allow the user to contract the dialog/ after expanding it for the first time./ state datacsize * m_psize;/ records the original size of the dialog before/ contractionbool m_bexpanded;/ records

49、whether the dialog is currently expanded or not.private:void expandbox(bool fexpand);void onclickadvancedo;；/afx_insert_location/ microsoft developer studio will insert additional declarations immediately before the previous line.#endif/ !defined(afx expandingdialog h cc371ce2 1dd1 11d2 96d3 841605c

50、10627 included )serialapp.cpp 下的代碼：#includc "stdafx.h"#include "serialapp.h"#include "serialappdlg.h"#ifdef .debug#define new debug_new#undcfthis_hlestatic char this_file = _file_;#endiflllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllii cser

51、ialappappbegin_message_map(cscrialappapp, cwinapp)/afx_msg_map(cserialappapp)/ note - the classwizard will add and remove mapping macros here./ do not edit what you see in these blocks of generated code! /afx_msgon_command(id_help, cwinapp:onhclp)end_message_map()/ cserialappapp construciioncseriala

52、ppapp: :cserialappapp()/ todo: add construction code here,/ place all significant initialization in initlnstance)lllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllii the one and only cserialappapp objectcserialappapp theapp;/i i cscrial appapp initializationbool cserial ap

53、papp: :lnitlnstance()afxenablecontrolcontainero;if(!afxinitrichedit()return false;)/ standard initialization/ if you are not using these features and wish to reduce the size/ of your final executable, you should remove from the following/ the specific initialization routines you do not need#ifdef _afxdllenable3dcontrols();/ call this when using mfc in a shared dll#elseenable3dcontrolsstatic(); / call this when linking to mfc statically#endifcscrialappdlg dig;m_pmainwnd = &dlg:int nrespo