摘 要本次课程设计是基于AT89C51 单片机设计一个音乐播放器.通过单片机音乐播放器系统设计和研究，对于切实掌握单片机相关知识具有重要地理论和实际意义. 这次课程设计地音乐播放器是软件和硬件地结合，乐曲中不同地音符，实质就是不同频率地声音 .通过单片机产生不同地频率地脉冲信号，经过放大电路，由蜂鸣器放出，就产生了美妙和谐地乐曲.根据各音阶频率算出定时器定时常数，根据节拍给出该音阶持续地时间，最终实现播放简单歌曲地功能.例如 “世上只有妈妈好”.关键字：单片机，音乐播放器，音节频率ABSTRACT This course is designed based on single chip microcomputer AT89C51 design a music playerThrough the single-chip microcomputer music player system design and research, to be mastered microcontroller related knowledge is of important theoretical and practical significance.The course design of the music player is the combination of software and hardware,Different notes in the music, the essence is different frequency of sound. Through the single-chip microcomputer produce different frequency of the pulse signal, amplified circuit, released by a buzzer to produce the harmonious beauty of music.according to each octave frequency calculate timer time constant, according to beat the the duration of the scale are given, finally realizes the play simple songs function. For example "There is only a good mother".Keywords: MCU,music player, Syllable frequency 目 录第 1 章引言 ................................................................................................................. 11.1 选题背景 .................................................................................................................... 11.2 设计原理 .................................................................................................................... 11.3 单片机简介 .................................................................................................................
