基于单片机简易计时器设计.doc

南华大学电气工程学院课程设计 PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT 2 南华大学电气工程学院课程设计 PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT i 摘 要：单片机自70年代问世以来得到蓬勃发展，目前单片机功能正日渐完善：单片机集成越来越多资源，内部储存资源日益丰富，用户不需要扩充资源就可以完成项目开发，不仅是开发简单，产品小巧美观，同时抗干扰能力强，系统也更加稳定，使它更适合工业控制领域，具有更广阔的市场前景；提供在线编程能力，加速了产品的开发进程，为企业产品上市赢得了宝贵时间。本设计通过STC89C51单片机以及单片机最小系统和三极管驱动以及外围的按键和数码管显示等部件，设计一个基于单片机的简易计时器。设计通过四位一体共阳极数码管显示，并能通过按键对秒进行设置。 关键词：STC89C51单片机，驱动，四位一体数码管 Abstract：SCM be booming since since the 70 s, MCU functions are increasingly perfect at present: single chip microcomputer integrated more and more resources, internal storage resource increasingly rich, users do not need to expand resources can complete the project development, is not only the development of simple, small beautiful products, at the same time, strong anti-jamming capability, system is more stable, make it more suitable for industrial control field, has a broad market prospect; Provide online programming ability, speeded up the process of product development, product for the enterprise to win the precious time. This design and triode driven by STC89C51 microcontroller and the single chip microcomputer minimum system and peripheral keys and digital tube display components, design a simple timer based on single chip microcomputer. Design through the four digital tube display, a total of anode, and can through the button to set the seconds. Keywords: STC89C51 microcontroller, drive, Four digital tube PAGE \* MERGEFORMAT PAGE \* MERGEFORMAT iv PAGE \* MERGEFORMAT iii PAGE \* MERGEFORMAT iii 目 录 TOC \o 1-3 \h \u HYPERLINK \l _Toc1219 引 言 PAGEREF _Toc1219 1 HYPERLINK \l _Toc15871 1.设计任务及基本要求 PAGEREF _Toc15871 2 HYPERLINK \l _Toc7462 2.系统基本方案选择与论证 PAGEREF _Toc7462 2 HYPERLINK \l _Toc5520 2.1 单片机选择 PAGEREF _Toc5520 2 HYPERLINK \l _Toc1892 2.2 显示模块选择方案和论证： PAGEREF _Toc1892 2 HYPERLINK \l _Toc2722 3.主要元件介绍 PAGEREF _Toc2722 3 HYPERLINK \l _Toc30953 3.1 STC89C51介绍 PAGEREF _Toc30953 3 HYPERLINK \