毕业设计论文基于STC89C52单片机的电子琴设计与实现.doc

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，如声音强弱控制、节拍器、自动放音功能等等也很好奇。 单片微型计算机它具有高性能、高速度、体积小、价格低廉、稳定可靠、应用广泛的特点。它的应用必定导致传统的控制技术从根本上发生变革。因此，单片机的开发应用已成为高科技和工程领域的一项重大课题。微型计算机的出现和大量使用将人类社会带入一个新的时代，单片微型计算机(简称单片机)在其中扮演着十分重要的角色。虽然它没有常见的PC那样大的体积和重量，不会在办公桌或控制台上占据一个显要的位置，但它就像小小的螺丝钉一样，镶嵌在人们工作、生活中需要计算、控制、测量等智能活动的各个角落。自20世纪70年代问世以来，单片机以其体积小、可靠性高、控制功能强、使用方便、性能价格比高、容易产品化等特点，在智能仪表、机电一体化、实时控制、分布式多机系统、家用电器等各个领域得到了广泛应用，对各个行业的技术改造和产品的更新换代起着重要的推动作用，对人们生活质量的提高产生了深刻的影响。作为21世纪的工科大学生，学好单片机，一方面可以加深对计算机原理和结构的认识，另一方面也为自身在专业上的深入发展构筑了一个很好的平台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89C52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。89C52单片机 第一章 续论··································································1 1.1 电子琴的概念·····························································1 1.2 电子琴的种类·····························································1 1.3 电子琴的工作原理························································· 1.4系统开发的背景··························································· 1.5 系统开发的意义··························································· 第二章 方案论证······························································ 2.1 控制模块选择方案························································ 2.2 按键选择方案····························································· 第三章 系统硬件设计及说明···················································· 3.1 系统组成及总体框图······················································ 3.2 元件简介································································ 3.2.1 STC89C52简介·························································· 3.2.2 主要功能特性··························································· 3.2.3工作原理································································ 3.2.4 LM386··································································· 3.3 设计实现过程···············