基于单片机及DS1302的LED电子钟设计——软件部分.doc

PAGE PAGE 1 基于单片机及DS1302的LED电子钟设计——软件部分 摘要 现代社会的快节奏生活要求人们对时间的掌握越来越精确，随着计算机在社会领域的渗透和大规模集成电路的发展，单片机的应用正在逐步地深入，电子钟也逐渐取代传统钟表被广泛应用于生活和工作中。电子时钟主要是利用电子技术将时钟电子化、数字化，拥有时间精确、体积小、界面友好、可扩展性能强等特点。 本设计以AT89C52芯片作为核心，8位LED数码管显示和DS1302时钟芯片主要组成来实现电子钟的基本功能，并分析了相应软件的设计要点，包括软件设计流程、仿真与调试。 关键词 电子钟；单片机；DS1302 ABSTRACT Nowadays people need more accurate time to keep up with the high pace of life. With computers in the infiltration and the development of large-scale integrated circuits，SCM application is steadily deepening, while electronic clock is widely used in our life and work taking place of traditional one. the electronic clock mainly uses the electronic technology to make the clock computerized and digitized, with features of accurate time、small size、a friendly user interface and strong expansibility. This design mainly consists of the core chip of AT89S52, 8 light emitting diodes and the clock chip DS1302 to achieve the basic function of the electronic clock, and also analyses the key designing of the corresponding software including software design flow, emulation and debugging KEY WORDS Electronic clock; Single Chip Microcomputer; DS1302 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc263247119 1.前 言 PAGEREF _Toc263247119 \h 1 HYPERLINK \l _Toc263247120 2.系统核心芯片介绍 PAGEREF _Toc263247120 \h 2 HYPERLINK \l _Toc263247121 2.1 单片机AT89S2简介 PAGEREF _Toc263247121 \h 2 HYPERLINK \l _Toc263247122 2.1.1 芯片主要性能 PAGEREF _Toc263247122 \h 2 HYPERLINK \l _Toc263247123 2.1.2 芯片引脚功能 PAGEREF _Toc263247123 \h 2 HYPERLINK \l _Toc263247124 2.2 时钟芯片DS1302简介 PAGEREF _Toc263247124 \h 4 HYPERLINK \l _Toc263247125 2.2.1 主要功能 PAGEREF _Toc263247125 \h 4 HYPERLINK \l _Toc263247126 2.2.2 内部结构及引脚功能 PAGEREF _Toc263247126 \h 5 HYPERLINK \l _Toc263247127 2.2.3 工作原理 PAGEREF _Toc263247127 \h 6 HYPERLINK \l _Toc263247128 2.2.4 控制字节及寄存器 PAGEREF _Toc263247128 \h 6 HYPERLINK \l _Toc263247129 2.2.5 数据的传送 PAGEREF _Toc263247129 \h 7 HYPERLINK \l _Toc263247130 3.电子钟软件设计 PAGEREF _Toc263247130 \h 9 HY