串口通信控制论文 8-8.docVIP

摘 要 随着的发展的各种应用日益受到人们的重视特别是得到了巨大的发展。Visual Basic开发的上位机软件，通过RS232串口通信控制下位机单片机控制板，以实现上位机远程和无按钮化控制情况恶劣复杂的工业现场下位机，并时刻监视下位机的工作端口的状态，应用继电器执行器实现弱电控制强电电路网络的功能。 关键词 单片机；上位机；串口通信控制；单片机控制板 Abstract The micro controller with the development of technology and communication technology, industry, enterprise and traffic information management requirements of toll has greatly improved, more and more used to be automatic equipment control, but with the development of the embedded technology, all kinds of high voltage to be automatic equipment management needs and information network connected, the original artificial control equipment have already cant meet the requirements, is a need to further improve, in order to adapt to the requirements, the subject of the design content can realize principal computer control heavy equipment, as well as with the enterprise information management network superior network communication. So SCM and principal computer communications technology of all kinds of applied more and more attention by people, especially in the industrial control and traffic management got a huge development. This design is mainly used Visual Basic development of the principal computer software, through RS232 serial communication under the control of a machine MCU, in order to realize the principal computer remote and no button computerized control conditions complex industrial site under a machine, and the time watching a machine work port state, application relay actuators weak electric control in high voltage circuit realized the function of network. Keywords Single chip microcomputer;principal computer;Serial interface communication control;MCU 目录 摘 要 I Abstract II 第1章 绪论 1 1.1 引言 1 1.2 课题的来源 1 1.3 课题的意义 1 2章 系统设计 3 2.1系统总体设计 3 2.1.1设计框图 3 2.1.2 结构示意图 4 2.2 微控制器介绍 4 2.2.1 单片机 4 2.2.2 AT89S51 8 2.3 串口控制芯片介绍 12 2.4 VB串口通信原理 14 2.4.1串口通信基本概念 14 2.4.2串口调试 18 2.4.3 VisualBasic串口通信控件 18 3章 上位机设计 19 3.1编程软件选择 19 3.2功能要求及设计原则 19 3.2.1功能要求 19 3.2.2设计原则 19 3.3 软件系统流程图 21 3.