251_542292_基于单片机的音乐盒设计.doc

摘要 本设计采用了蜂鸣器发声来实现歌曲的播放，能保持基本音调不变，流畅播放出歌曲。现选用AT89S51单片机。主要设计模块包括数码管显示部分，功能键盘部分，蜂鸣器发声部分，彩灯部分。显示部分管采用共阳极数码管，通过单片机控制实现歌曲序号的显示；功能键盘采用按键开关，通过单片机的控制来实现歌曲播放顺序的调换和暂停播放功能；蜂鸣器实现歌曲播放；彩灯是由普通发光二极管代替，能实现单色长亮和闪烁效果。 此次设计要利用单片机及KeilC51编程软件编程和PROTEUS单片机仿真软件和电子电工等方面知识,用KeilC51编程软件编程，用PROTEUS单片机仿真软件仿真。最后制作实物，将程序下载到单片机中，利用I/O口产生一定频率的方波，驱动蜂鸣器，发出不同的音调，从而演奏乐曲。 关键词：AT89S51单片机;方波; 音调ABSTRACT This design USES the buzzer to realize the voice of play songs, can maintain the same basic tones, fluent plays songs. Now choose AT89S51. The main design module to include digital tube display section, the function of the keyboard, a buzzer of voice, the lantern parts. Shows part of the tube is altogether anode digital tube, through the single-chip microcomputer control realization of songs serial number display; The keyboard function button switches, through the single-chip microcomputer control to realize the order of the songs played exchange and suspend play function; Songs played buzzer realize; Lights is by ordinary leds instead of, can realize the monochrome long bright and flickering effect. This design using single chip computer to KeilC51 programming and software programming and PROTEUS single-chip microcomputer simulation software and electronic electrician aspects knowledge, with KeilC51 programming software programming, with PROTEUS single-chip microcomputer simulation software simulation. Finally making real, will program downloaded to single chip microcomputer, the use of I/O mouth produce a certain frequency of square wave, drive a buzzer, a different tone, thus playing music. Key words: AT89S51 microcontroller; square; tone目录 摘要 I ABSTRACT II 前言 IV 1 绪论 1 1.1国内外研究现状 1 1.2 单片机发展趋势 1 2音乐盒总体设计 2 2.1设计功能要求 2 2.2 工作原理 2 2.3总体设计框图 2 3芯片的选择和介绍 4 3.1MCS-51系列单片机简介 4 3.2单片机的选择 4 4系统硬件设计 8 4.1电源电路的设计 8 4.2 单片机最小系统 8 4.3 数码管显示部分 9 4.4 键盘部分 11 4.5蜂鸣器部分 11 5系统软件设计 13 5.1软件系统介绍 13 5.2编程语言的选择 13 5.3应用软件的选择—keilc51 13 5.4系统程序设计 14 5.5系统的程序设计 16 6系统仿真及硬件制作 22 6.1仿真的必要性 22 6.2系统仿真过程 22 结论 23 参考文献 24 致谢