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基于51单片机的音乐播放器制作(43页).doc
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基于51单片机的音乐播放器制作(43页).doc
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------------------第 I 页
基于 51 单片机的音乐播放器制作
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------------------第 I 页
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的理论和实
际意义。
这次课程设计的音乐播放器是软件
和硬件的结合,乐曲中不同的音符,实
质就是不同频率的声音。通过单片机产
生不同的频率的脉冲信号,经过放大电
路,由蜂鸣器放出,就产生了美妙和谐
的乐曲。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的时
间,最终实现播放简单歌曲的功能。例
如“世上只有妈妈好”。
关键字:单片机,音乐播放器,音节频
率
![](https://csdnimg.cn/release/download_crawler_static/89018060/bg4.jpg)
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,
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------------------第 III 页
Syllable frequency
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