基于AT89S52单片机的电子琴设计.doc

PAGE 基于AT89S52单片机的电子琴设计 【摘要】 微型电子琴的设计以AT89S52单片机作为系统的核心控制部分，通过制作硬件电路和软件的设计编写，然后进行软硬件的调试运行，最终达到设计电路的乐器演奏、点歌、存储及显示功能。设计中应用中断系统和定时/计数原理控制演奏器发声，对音乐发生所必须确定的音符和节拍分别用程序语言实现。可以用它来弹奏和播放乐曲。特点是设计思路简单、清晰,成本低。 【关键字】 单片机 音乐发生器 AT89S52 AT89S52 microcontroller-based flower design 【Abstract】： The design takes 89S52 SCM as the core of system's control section . In order to achieve the effect of the circuit that performancing the musical instrument, requesting a song, the function of the memory and demonstration, we can carry on software and hardware's debugging through manufacturing hardware circuit and compiling the software's design . The design applies the principle of the interruption system and fixed time/the counting to performance sound production, and according to the program language to realize the separation of the note and time at the same time. We can use it to play with the broadcast music. And the best advantage is this design is simply and clear . 【key words】: SCM Music Generator AT89S52 目 录 1.前言………………………………………………………………………………1 1.1系统开发背景……………………………………………………………………1 1.2 系统开发意义…………………………………………………………………1 1.3 设计目标………………………………………………………………………1 2.方案论证…………………………………………………………………………1 2.1 控制模块选择方案………………………………………………………………1 2.2按键选择方案……………………………………………………………………1 3.系统硬件设计及说明…………………………………………………………2 3.1系统组成及总体框图……………………………………………………………2 3.2元件简介…………………………………………………………………………2 3.2.1 AT89S52………………………………………………………………………… 3.2.2 LM386…………………………………………………………………………3 3.2.3 LED数码管……………………………………………………………………5 3.3音频功放电路……………………………………………………………………6 3.4显示电路…………………………………………………………………………7 4.系统软件设计……………………………………………………………………7 4.1 音乐相关知识……………………………………………………………………7 4.2如何用单片机实现音乐的节拍…………………………………………………7 4.3如何用单片机产生音频脉冲……………………………………………………7 4.4系统总体功能流程图……………………………………………………………8 5.系统调试…………………………………………………………………………11 5.1硬件调试…………………………………………………………………………11 5.2 软件调试…………………………………………………………………………11 6.结论………………………………………………………………………………11 7.参考文献…………………………