【正文】 hods are pared,this design selects the MFC application program which is based on C++ .The design realize the serial munication by using MSComm ActiveX serial munication control. This article introduces the ActiveX control technologyMSComm control. Finally, the design realizes serial munication between two puters. Because of the advantages of low cost and simple structure, serial munication is widely used by people. Realization of serial munication between two PC machines is the foundation of realizing more plex munication. Keywords:RS232 protocol。文中詳細(xì)地介紹了 VC下的 Windows 平臺先進(jìn)的 ActiveX 控件技術(shù)，即 MSComm 控件等。 詳細(xì)的分析了幾種主要的通信參數(shù)。在工業(yè)控制系統(tǒng)和實驗室中， 由 于串行通信具有實現(xiàn)簡單、使用靈活方便等優(yōu)點，串行通信是計算機(jī)與外部設(shè)備進(jìn)行數(shù)據(jù)通信時經(jīng)常使用的方式之一。通信的方式多種多樣，以何種方式實現(xiàn)通信主要取決于通信 設(shè)備。 在研究 RS232 串行通信原理中，主要介紹了 RS232 標(biāo)準(zhǔn)協(xié)議、串口以及串口通信原理。利用 MSComm ActiveX 串行通信控件來實現(xiàn)串行通信。用 RS232 協(xié)議實現(xiàn)兩臺PC 機(jī)間的串行通信為以后實現(xiàn)更加復(fù)雜的設(shè)備間通信奠定了基礎(chǔ)。 CRC Cyclic Redundancy Check I 目 錄 摘 要 ..................................................................................................................................... I Abstract ...................................................................................................................................... II 第 1 章 緒論 .............................................................................................................................. 1 課題的研究意義 ......................................................................................................... 1 研究現(xiàn)狀及發(fā)展趨勢 ................................................................................................. 2 RS232 串行通信的研究現(xiàn)狀 ........................................................................... 2 RS232 串行通信的發(fā)展趨勢 ........................................................................... 2 本文主要的研究內(nèi)容 ................................................................................................. 2 第 2 章串行通信基本原理 ........................................................................................................ 4 RS232 通信協(xié)議 .......................................................................................................... 4 RS232 標(biāo)準(zhǔn) ....................................................................................................... 4 RS232 接口 ....................................................................................................... 4 串行通 信 ..................................................................................................................... 5 串行通信基本原理 .......................................................................................... 5 串行通信參數(shù) .................................................................................................. 6 串行通信的分類 ...................................................................................................... 7 串口的調(diào)制 ................................................................................................................. 8 串口連接 .......................................................................................................... 8 串口調(diào)試 .......................................................................................................... 9 本章小結(jié) ................................................................................................................... 10 第 3 章 CRC 校驗 ................................................................................................................... 11 CRC 校驗原理 ........................................................................................................... 11 CRC 校驗碼的基本原理 ................................................................................ 11 CRC 校驗碼權(quán)的形式 .................................................................................... 12 CRC 校驗的實現(xiàn) ....................................................................................................... 13 本章 小結(jié) .................................................................................................................... 13 第 4 章 軟件的實現(xiàn)及其測試 ................................................................................................ 14 開發(fā)工具概述 ........................................................................................................... 14 Windows 編程與 MFC ................................................................................... 14 串行通信控件 MSComm .............................................................................. 14 程序的主要功能 ....................................................................................................... 15 程序運行平臺 ........................................................................................................... 17 II 詳細(xì)設(shè)計 .................................................................................................................... 17 建立工程 ........................................................................................................ 17 界面功能實現(xiàn) ................................................................................................ 18 模塊分析 ........................................................................................................ 21 程序測試 ........................................................................................................ 34 本章小結(jié) ................................................................................................................... 39 第 5 章 結(jié)論 ............................................................................................................................ 40 參 考 文 獻(xiàn) ............................................................................................................................ 41 致 謝 .................................................................................................... 錯誤 !未定義書簽。 VC++是新一代面向?qū)ο蟮目梢暬_發(fā)工具，作為一個主流的開發(fā)平臺一直深受編程愛好者的喜愛，提供了良好的 界面設(shè)計資源，是當(dāng)下圖形開發(fā)的一個比較重要的技能和手段， Window 圖形界面編