[信息与通信]单片机课程设计 数字电子钟设.doc

摘 要 在当今时代我们可以随意看到电子钟，电子钟是一种利用数字电路来显示秒、分、时的计时装置，与传统的机械钟相比，它具有走时准确、显示直观、无机械传动装置等优点，因而得到广泛应用。随着人们生活环境的不断改善和美化，在许多场合可以看到数字电子钟。Nowadays we are free to see electric clock，electric clock a timer which is a use of digital circuit to display seconds,,minutes,hours. Compared with the traditional mechanical clock, It has traveltime accurate, show intuitional, no mechanical transmission device etc, thus it is widely used. As people of living environment constantly improving and beautification, We can see digital electric clock on many occasions so that it has the great worthy of publicity. After Learning the single microcontroller technology , taking advantage of technology of extending parallel I/O mouth , connecting LED digital to display, picking button control tube, using single chip computer chip programming realize function of electric clock and stopwatch . Key words Digital electric clock Stopwatch Single Micr0Controller 目 录 1 设计方案及工作原理··············································4 1.1 设计课题任务···············································4 1.2 功能要求说明···············································4 1.3 总体方案介绍···············································4 1.4 工作原理介绍···············································6 2 硬件系统的设计··················································6 2.1 硬件功能模块介绍···········································6 2.2 原理图、PCB图、元器件布局图································8 2.3 元器件部分清单·············································8 3 软件系统的设计··················································9 3.1 单片机资源使用说明·········································9 3.2 软件系统各模块功能介绍·····································9 3.3 软件系统程序流程框图·······································10 3.4 软件系统的程序·············································13 4 设计总结························································29 4.1 使用说明···················································29 4.2 设计结论···················································29 4.3 误差分析········