【正文】 畢業(yè)論文 題目： 基于單片機(jī)的 電子計(jì)算 器 學(xué)校： 安徽工貿(mào)職業(yè)技術(shù)學(xué)院 專業(yè)： 電子與信息工程系 班級： 機(jī)電 5 班 學(xué)號 ： 2020350501 指導(dǎo)老師： 劉旭 摘要 近年來隨著計(jì)算機(jī)在社會領(lǐng)域的滲透和大規(guī)模集成電路的發(fā)展，單片機(jī)的應(yīng)用正在不斷地走向深入，由于它具有功能強(qiáng)，體積小，功耗低，價(jià)格便宜，工作可靠，使用方便等特點(diǎn)，因此特別適合于與控制有關(guān)的系統(tǒng)，越來越廣泛地應(yīng)用于自動(dòng)控制，智能化儀器，儀表，數(shù)據(jù)采集，軍工產(chǎn)品以及家用電器等各個(gè)領(lǐng)域， 作為微型機(jī)的一個(gè)主要分支，單片機(jī)在結(jié)構(gòu)上的最大特點(diǎn)是把 CPU、 RAM 和 ROM 存儲器、定時(shí)器和多種 I/O 接口電路集成在一塊超大規(guī)模集成電路芯片上。從它的組成和功能來看，一塊單片機(jī)芯片其實(shí)就是一臺計(jì)算機(jī)。 本次設(shè)計(jì)是采用 MSC51 單片機(jī)來設(shè)計(jì)的四位數(shù)計(jì)算器 , 采用 C 語言進(jìn)行程序編寫實(shí)現(xiàn)計(jì)算器功能。外接 4X4 的鍵盤，通過鍵盤掃描來完成輸入數(shù)的控制，利用驅(qū)動(dòng)電路使數(shù)值與結(jié)果在七段共陰極數(shù)碼管上正常顯示，并設(shè)有清零鍵可隨時(shí)完成計(jì)算與顯示的清零。計(jì)算器將完成的 0 至 9999 整數(shù)的一次加 /減 /乘 /除運(yùn)算。 執(zhí)行過程如下： 開機(jī)即顯示 0，等待鍵入數(shù)值，當(dāng)輸入數(shù)字，將通過數(shù)碼管顯示出來，在輸入＋ 、 、 *、 /運(yùn)算符之后，計(jì)算器在內(nèi)部執(zhí)行數(shù)值轉(zhuǎn)換和存儲，并等待再次輸入數(shù)值，當(dāng)在鍵入數(shù)值后將顯示鍵入的數(shù)值，按等號就會在數(shù)碼管上顯示運(yùn)算結(jié)果。 關(guān)鍵詞： 單片機(jī) 計(jì)算器 C 語言 鍵盤掃描 。 英文摘要 In recent years, as puter peration in the social field and largescale development of integrated circuits, microcontroller applications are continually deepening, because of its powerful function, small size, low power consumption, cheap, reliable, easy to use, etc. therefore particularly suitable for systems with control of more and more widely used in automatic control, intelligent instruments, meters, data acquisition, military products and home appliances fields, As one of the main branch of microputer, microcontroller in the structure of the biggest feature is the CPU, RAM and ROM memory, timer and multiple I / O interface circuit integrated on a VLSI chip. The position and function from its point of view, a single chip is actually a puter. This design is the use of MSC51 microcontroller to design the fourdigit calculator, using C programming language to achieve calculator functions. 4X4 external keyboard, the keyboard scan to finish by the number of control values and make the drive circuit to the cathode results in a total of sevensegment digital tube display properly, and has cleared at any time to plete key calculation and display clear. Calculator to plete an integer from 0 to 9999 plus / minus / multiply / divide. Implementation of the process is as follows: Power is displayed 0, waiting type value, when the input numbers, will e out through the digital display, the input +,,*,/ operator, the calculator in the internal implementation of the numerical conversion and storage, and wait for the reenter the value, when Type the value in the type of value wi