电子琴课程设计.doc

《单片机原理》课程设计题目:电子琴设计姓名: 学号: 专业: 院系: 信息工程学院指导老师: 完成时间: 2012 年 12月 06日安徽新华学院教务处制 I 摘要本设计是基于 AT89S52 单片机的简易电子琴设计。主要组成是以 51单片机最小系统为核心,通过矩阵键盘获取按键信息,运用单片机定时器等部件实现蜂鸣器发声。本系统是用 4X4 组成的 16个矩阵键盘中的 7个,来设计 7个音阶,可随意弹奏想要表达的音乐的功能。本设计的特点是:大部分功能通过软件实现,使电路简单明了,系统稳定性好。电子琴是电子科技与音乐结合的产物是一种新型的键盘乐器。一首音乐是许多不同的音阶组成的,而每个音阶对应着不同的频率,这样我们就可以利用不同的频率的组合,即可构成我们所想要的音乐了,当然对于单片机来产生不同的频率非常方便,我们可以利用单片机的定时/计数器 T0来产生这样方波频率信号, 定时/计数器 T1产生音乐节拍。关键词: AT89S52 ;按键;蜂鸣器;音阶 II ABSTRACT The design is based on AT89S52 simple flower design. ponent is based on51 single-chip Minimum system as the core matrix keyboard access to key information, the use of single-chip ponents to achieve bee Buzzer sound. This system isa16 with a 4X4 matrix keyboard 7, to design seven scale, free to play want to express the music. The characteristics of this design is: most of the functionality implemented by software, the circuit is simple, good stability of the system. The keyboard is the product of bination of electronic technology and music isa new type of keyboard instruments. A music of many different scales, and each scale corresponds toa different frequency, so that we can take advantage of bination of the different frequencies, can constitute the music we want to,of course, for the microcontroller to produce different the frequency is very convenient, we can use the the microcontroller timer / counter T0 to produce a square wave frequency signal, timer / counter T1 produce music beats. KEYWORDS : AT89S52;Buttons; Buzzer; Scale 目录摘要.................................................................................................................................................... I ABSTRACT ....................................................................................................................................... II 1绪论............................................................................................................................................... 1 2 系统简介.......................................................