1、一個(gè)基于單片機(jī)精確計(jì)時(shí)的電源開關(guān)程序的設(shè)計(jì)與實(shí)現(xiàn)entation of a Power Switch Control Procedure Based on a Precise Time Control of MCUAbstractPrecise time control is widely applied in the industrial control, and some other areas of our daily life at present. This design utilizes the MCS-51 microcontroller as the core componen

2、ts, and some external peripheral circuits. The microcontroller has been designed based on the precise time control hardware system, and contacted the controlled device with a Relay. It can be achieved that relatively small current could control a larger current. The software is designed based on the

3、 hardware systemn2.3.4LED顯示電路設(shè)計(jì)與器件選擇102.3.5按鍵電路設(shè)計(jì)與器件選擇122.3.6蜂鳴器電路的設(shè)計(jì)132.3.7繼電器電路的設(shè)計(jì)142.4.硬件設(shè)計(jì)電路原理圖142.5.硬件的調(diào)試153.軟件設(shè)計(jì)153.1.程序流程圖153.2.程序設(shè)計(jì)具體實(shí)現(xiàn)163.3.編譯軟件的使用和編譯過程183.4.燒片183.5.系統(tǒng)測(cè)試19結(jié) 論19參考文獻(xiàn)20致 謝21聲 明221. 引言1.1. 課題背景1.1.1. 單片機(jī)概述單片機(jī)也被稱作單片微型計(jì)算機(jī)、微控制器、嵌入式微控制器。單片機(jī)一詞最初是源于Single Chip Microcomputer,簡(jiǎn)稱SCM。隨著SCM在技術(shù)上、體系結(jié)構(gòu)上不斷擴(kuò)展其控制功能，單n的優(yōu)點(diǎn)，它已成為科技領(lǐng)域的有力工具，人類生活的得力助手。它的應(yīng)用遍及各個(gè)領(lǐng)域，主要表現(xiàn)在以下幾個(gè)方面：1.單片機(jī)在智能儀表中的應(yīng)用2.單片機(jī)在機(jī)電一體化中的應(yīng)用3.單片機(jī)在實(shí)時(shí)控制中的應(yīng)用4.單片機(jī)在分布式多機(jī)系統(tǒng)中的應(yīng)用5.單片機(jī)在人類生活中的應(yīng)用單片機(jī)已成為計(jì)算機(jī)發(fā)展和應(yīng)用的一個(gè)重要方面，另一方面，單片機(jī)應(yīng)用的重要意義還在于，它從根本上改變了傳統(tǒng)的控制系統(tǒng)設(shè)計(jì)思想和設(shè)計(jì)方法。從前必須由模擬電路或數(shù)字電路實(shí)現(xiàn)的大部分功能，現(xiàn)在已能通過單片機(jī)來實(shí)現(xiàn)了。這種用軟件代替硬件的控制技術(shù)也稱為微控制技術(shù)，是對(duì)傳統(tǒng)控制技術(shù)的一次革命。A：由單片機(jī)組