毕业论文：基于单片机简易电子琴的设计（终稿）.doc

目 录 摘要 1 ABSTRACT 2 引言.......................................................................3 1方案论证 4 1.1原理 4 1.2系统板硬件连线 5 1.3.1AT89S51简介 LM386 6 1.3.3LED数码管 8 2.1 4X4行列式键盘识别及显示 9 2.1.2 程序设计内容 .1.3 I/O并行口直接驱动LED显示 .2 音乐产生的方法 .2.1 原理 .2.2 程序框图 14 3.1全文总结 14 3.2研究展望...............................................................14 结束语 16 致谢 17 个人简历..................................................................18 附录 19 摘 要 随着社会的发展进步，音乐逐渐成为我们生活中很重要的一部分，有人曾说喜欢音乐的人不会向恶。我们都会抽空欣赏世界名曲，作为对精神的洗礼。本论文设计一个基于单片机的简易电子琴。我们对于电子琴如何实现其功能，如音色选择、声音强弱控制、节拍器、自动放音功能等等也很好奇。 电子琴是现代电子科技与音乐结合的产物，是一种新型的键盘乐器。它在现代音乐扮演着重要的角色，单片机具有强大的控制功能和灵活的编程实现特性，它已经溶入现代人们的生活中，成为不可替代的一部分。本文的主要内容是用AT89S51单片机为核心控制元件，设计一个电子琴。以单片机作为主控核心，与键盘、扬声器等模块组成核心主控制模块，在主控模块上设有16个按键和扬声器。本系统运行稳定，其优点是硬件电路简单，软件功能完善，控制系统可靠，性价比较高等，具有一定的实用和参考价值。 ? ? ? ? ? ABSTRACT With the development and progress of society, music has become an important part of life, it was said that people do not like the music to the evil. We will find time to enjoy the world music, as the baptism of the spirit. This thesis developed a simple microcontroller-based electronic key board. Electronic organ is a modern electronic music technology and the product is a new type of keyboard instruments. It modern music played an important role in single chip is a powerful control functions and flexible programming characteristics, It has converged with modern peoples lives, become an irreplaceable part. The main content is AT89C51 control of the core components, Design of an electronic organ, single chip as a host to the core, with the keyboard, speakers and other core modules main control module, in the main control module has 16 keys and speakers. Stability of the system, its advantages are simple hardware circuits, software functions, control system reliability, high cost performance and have certain practical and reference value. Key words : single chip?MCU keyboard? speaker? electronic organ ? ? ? ? ? ? 引 言 单片微型计算机是大规模集成电路技术发展的产物，属第四代电子计算机，它具有高性能、高速度、体积小