【正文】 CM applications are constantly deepening, and promote the traditional control detection technology update. Single chip is integrated on a chip microputer, including CPU, random access memory, a readonly memory, input / output interface circuit, timer / counter and other parts. In this paper the main train of thought of the design is the use of AT89C52 microcontroller as the central processor, the application of LED digital display, design has a timer and countdown function electronic stopwatch. The paper summarizes mainly introduced this topic research background, research significance and tasks. The text firstly introduces the system hardware design and working principle, then briefly discusses the process flow, process of each function module of the analysis and the realization of the process, finally summarizes the design difficulty, key points and gain experience.Key words：SingleChip Microputer ， LED figures tube display，AT89C52湖南軟件職業(yè)學(xué)院畢業(yè)設(shè)計（論文）III目 錄摘 要 ...................................................................................................................................IABSTRACT...........................................................................................................................II引 言 ...................................................................................................................................1第一章 單片機概述 ...........................................................................................................2 單片機概念 ........................................................................................................2 單片機和微處理器 ............................................................................................2 單片機和嵌入式系統(tǒng) ........................................................................................3第二章 電子時鐘設(shè)計方案分析 .......................................................................................4 FPGA 設(shè)計方案 ....................................................................................................4 NE555 時基電路設(shè)計方案 .................................................................................4 單片機設(shè)計方案 ................................................................................................5第三章 基于單片機的電子時鐘硬件設(shè)計 .......................................................................6 主要芯片選擇 .....................................................................................................6 微機處理器選擇 .....................................................................................6 環(huán)境溫度傳感器選擇 ..............................................................................7 電子時鐘硬件電路設(shè)計 ....................................................................................8 時鐘電路設(shè)計 .........................................................................................8 環(huán)境溫度采集電路 .................................................................................9 顯示電路 ...............................................................................................10 按鍵電路設(shè)計 .......................................................................................11 鬧鈴電路設(shè)計 .......................................................................................12第四章 電子時鐘軟件設(shè)計 .............................................................................................14 主程序設(shè)計 ......................................................................................................14 子程序的設(shè)計 ...................................................................................................14 實時時鐘日歷子程序設(shè)計 ...................................................................14 環(huán)境溫度采集子程序設(shè)計 ...................................................................15 顯示子程序設(shè)計 ...................................................................................19 鬧鈴子程序設(shè)計 ...................................................................................19第五章 系統(tǒng)調(diào)試 .............................................................................................................21 硬件調(diào)試 ...........................................................................................................21 單片機基礎(chǔ)電路調(diào)試 ...........................................................................21 顯示電路調(diào)試 .......................................................................................22 DS1302 電路測試 .................................................................................24 按鍵電路測試 .......................................................................................25 軟件測試 ...........................................................................................................25湖南軟件職業(yè)學(xué)院畢業(yè)設(shè)計（論文）IV 環(huán)境溫度采集子程調(diào)試 .......................................................................25結(jié) 論 ...............................................................................................................................26致謝 ...................................................................................................................................27湖南軟件職業(yè)學(xué)院畢業(yè)設(shè)計(論文 ) 引言1引 言時間是人類生活必不可少的重要元素，如果沒有時間的概念，社會將不會有所發(fā)展和進步。本文設(shè)計的主要思路是采用 ATMEL 公司的 AT89C52 單片機作為中央處理器，應(yīng)用 LED 數(shù)碼顯示器，設(shè)計具有計時和倒計時功能的電子秒表。湖南軟件職業(yè)學(xué)院畢業(yè)設(shè)計（論文）基于單片機電子鐘的設(shè)計Microcontrollerbased design of intelligent electronic clock專 業(yè) 名 稱： 電子信息工程技術(shù)指 導(dǎo) 老 師： 唐啟見畢業(yè)生姓名： 向成畢業(yè)生學(xué)號： 202203080131論文提交日期：分類號： 學(xué)校代碼：4711密碼：無 畢業(yè)生學(xué)號202203080131基于單片機電子鐘的設(shè)計Microcontrollerbased design of intelligent electronic clock專 業(yè) 名 稱： 電子信息工程技術(shù)指 導(dǎo) 教 師： 唐啟見畢 業(yè) 生 姓 名： 向成畢 業(yè) 生 學(xué) 號： 202203080131論 文 課 題 來 源： 教師科研課題論 文 提 交 日 期：論 文 評 審 單 位： 湖南軟件職業(yè)學(xué)院湖南軟件職業(yè)學(xué)院畢業(yè)設(shè)計（論文） 目錄2湖南軟件職業(yè)學(xué)院畢業(yè)設(shè)計（論文）I摘 要隨著計算機在社會領(lǐng)域的滲透，單片機的應(yīng)用正在不斷地走向深入，同時帶動傳統(tǒng)控制檢測技術(shù)不斷更新。單片機是指集成在一個芯片上的微型計算機，主要包括 CPU、隨機存儲器、只讀存儲器、基本輸入/ 輸出接口電路、定時器/ 計數(shù)器等部件。論文概述中主要介紹了本次課題