AT89S51單片機實現(xiàn)多功能數(shù)字鐘

電子信息工程論文編號:DZXX274  論文字?jǐn)?shù):12878,頁數(shù):35

目  錄

摘要  I
ABSTRACT II
第1章 緒論 - 1 -
 1.1 選題背景 - 1 -
 1.2 研究內(nèi)容 - 3 -
第2章 AT89S51簡介 - 4 -
 2.1 主要性能參數(shù) - 4 -
 2.2 功能特性概述 - 5 -
 2.2.1 引腳功能說明 - 5 -
 2.2.2 特殊功能寄存器 (SFR)介紹 - 7 -
 2.3 小結(jié) - 8 -
第3章 系統(tǒng)設(shè)計與分析 - 9 -
 3.1 系統(tǒng)分析 - 9 -
 3.2 技術(shù)方案 - 9 -
 3.2.1  LED數(shù)碼管 - 9 -
 3.2.2  譯碼器的選擇 - 10 -
 3.2.3  外部中斷擴展芯片的選擇 - 11 -
 3.3 關(guān)鍵技術(shù) - 12 -
 3.3.1  單片機復(fù)位電路與晶振電路 - 12 -
 3.3.2  LED的驅(qū)動和顯示 - 13 -
 3.3.3  LED片選電路的設(shè)計 - 14 -
 3.3.4  定時器的使用 - 15 -
 3.3.5  外部中斷控制電路 - 16 -
 3.4 相關(guān)功能模塊程序 - 19 -
 3.4.1 主程序 - 19 -
 3.4.2 復(fù)位程序 - 20 -
 3.4.3 顯示程序 - 23 -
 3.5 誤差分析 - 25 -
 3.6 小結(jié) - 26 -
第4章 結(jié)果分析及未來展望 - 27 -
第5章 結(jié)論 - 28 -
致謝  - 29 -
參考文獻(xiàn) - 30 -
附錄1 電路圖 - 31 -

摘要

 本次畢業(yè)設(shè)計主要通過用AT89S51單片機實現(xiàn)多功能數(shù)字鐘的制作來達(dá)到學(xué)習(xí)與設(shè)計的目的，主要是對單片機的定時器、中斷這兩個重要概念的進(jìn)行相關(guān)的的學(xué)習(xí)與設(shè)計，從而來提高自身的軟、硬開發(fā)能力。
 單片機做為嵌入式系統(tǒng)的一個重要部分，同時也是計算機的一個重要分支。在計算機中，把包含運算器和控制器的IC稱為CPU(Central Processor Unit)，而為了進(jìn)一步縮小PCB板的面積以適合于一些特殊場合的需要，提高系統(tǒng)可靠性，將輸入、輸出接口電路、時鐘電路以及存儲器、運算器和控制器集成在一個CPU芯片內(nèi)，就成了單片機（也稱為微控制器）。單片機即微控制器(Micro Controller Unit)。單片機不是完成某一個邏輯功能的芯片，而是把一個計算機系統(tǒng)集成到一個芯片上。概括的講：一塊芯片就成了一臺計算機。它的體積小、重量輕、價格便宜、為學(xué)習(xí)、應(yīng)用和開發(fā)提供了便利條件。同時，學(xué)習(xí)使用單片機是了解計算機原理與結(jié)構(gòu)的最佳選擇。而51系列單片機是各單片機中最為典型和最有代表性的一種。
 本次畢業(yè)設(shè)計所設(shè)計的數(shù)字鐘為杭州萬吉達(dá)電子有限公司生產(chǎn)的數(shù)碼相機中的部分功能模塊，本人參與了產(chǎn)品相關(guān)功能模塊的設(shè)計與調(diào)試。
 
關(guān)鍵字：單片機，AT89S51，數(shù)字鐘

ABSTRACT

 This graduation design mainly is to manufacture a multi-purpose digital clock through using the AT89S51 MCU. In order to study and design a MCS-51 system. The mainly purpose is to study and applicant the MCS-51's timer and the interrupt, Thus to improve my design of the software and hardware.
 Single Chip Microprocessor is one of the most important of the embedded system, It is also an important branch of the computer. In the computer, the IC which contains the logic unit and controller is called CPU(Central Processor Unit).but in order to reduce the area of the PCB board. Enhanced the system reliability. put the input and the output interface electric circuit、the clock electric circuit and the memory, the logic unit and the controller integration in a CPU chip, then the single chip is became the Micro Controller Unit(we can also call it as a Micro Processor Unit).the MCU is not a IC that completes some logical function, it integrates a whole computer system on the chip. Summary Speaking; A MCU is a small computer. it has small volume, light weight, and its price is cheap. all these has provided the convenient condition for the study, the application and the development. At the same time, the study of using the MCU is the best choice of understanding the computer principle and the structure. And the MCS-51 is one of the most typical and the representation MCU.
 This digital clock of the graduation design is designed for the digital camera which is produced by the (hang Zhou) D-MAX electronic LTD. And I take part in the design and debug of the product.

Keywords: Single Chip Microprocessor，AT89S51，Digital Clock