基于单片机控制的信号发生器.doc

专业工程设计( 论文) 说明书题目: 基于单片机控制的信号发生器院(系): 电子工程与自动化学院专业: 电子信息科学与技术学生姓名: 蓝枫爱恋学号: 1100840121 指导教师: 李莉 201 5年1月1日摘要在已学课程的基础上,实现理论与实际的结合,分析现有的信号发生器的结构、工作原理、以及实现过程,制作一个简单的信号发生器。本次制作的信号发生器以 AT89S5 1 单片机核心,通过软件、硬件的相互协调,实现方波、三角波、正弦波的产生,并且波形的幅度、频率都实现可调,方波的占空比也可以实现可调,所得波形频率不可低于 10HZ 。该信号发生器由以下几部分构成:波形产生模块、最小系统模块、D/A 转换模块、控制模块(复位、频率控制、占空比控制、幅度控制)、波形输出模块以及相关软件设计部分。软件设计部分,在AT89S51 单片机上,完成数据处理和控制程序,同时完成对信号的输出控制程序。首先完成相关硬件的制作,在确定硬件无误后,下载程序到单片机中,经过不断的调试、修改,最后达到设计的要求。关键字: 信号发生器; AT89S51 单片机; D/A 转换 Abstract On the basis of in the course, and to realize bination of theory with practice, the analysis of the existing structure, the working principle of signal generator, as well as the implementation process, to create a simple signal generator. The signal generator ’s core is AT89S51. And t hrough the software, hardware, coordinate with each other, realize the production of square wave, triangle wave, sine wave, and the waveform amplitude and frequency are adjustable .S quare wave of adjustable duty ratio can be controlled. The waveform frequency can not less than 10 HZ. The s ignal generator posed of the following sections: waveform generating module, minimum system module, D/A conversion module, control module ( reset, frequency control, the duty ratio control and amplitude control), waveform output module and related software design part. Software design part, complete writing of the data processing and control program, at the same time plete writing of signal output control progra omplet ing the related hardware, in determining the correct hardware .D ownload ing the program to AT89S51 , through continuous debugging and modifying .F inally , to meet the design requirements . Key words: signal generator ; AT89S51; D/A conversion 目录引言........................................................................................................................ 1 1 设计任务及要求.............................................................................................. 1 总体方案..................