基于单片机的函数发生器的设计和实现(毕业论文).doc

武汉科技大学中南分校 本科毕业设计(论文) 题　　目：基于单片机的函数发 生器的设计和实现 学　　院： 信息工程学院 专　　业： 学　　号： 学生姓名： 指导教师： 二○一一年 五 月 八 日 基于单片机的函数发生器的设计和实现 XXX 摘 要 函数发生器是一种用于产生标准信号的电子仪器，它广泛用于工业生产、科研和国防等各个领域中，所以论文选题具有一定的实用意义。 本文在介绍了函数发生器的基本概念及原理的基础上，核心采用AT89C52单片机，完成了简易的DDS函数发生器的硬件设计和软件编程，并通过调试实现了其功能和主要技术指标。 在系统的硬件部分，设计了由单片机最小系统为核心、通过接口设计，扩展了DAC转换模块、按键和LED显示模块。其中，采用两片DAC0832实现了全数字化的频率合成器protel 99SE设计并制作了函数发生器的印制电路板PCB；并完成了样机的制作和调试。在实验室里，进行了测试，结果表明系统达到设计要求。 关键词：信号发生器,AT89C52,keilc51 MCU-based Function Signal Generator Design XiongChengshuang ABSTRACT The function generator is one kind uses in producing the standard signal electronic instrumentation, it widely uses in the industrial production, the scientific research and the national defense and so on each domain, therefore the paper selected topic has certain practical significance. This article lay between the Shao function generator the basic concept and in the principle foundation, used at89C52 monolithic integrated circuit is the core, has completed the simple DDS function generator hardware design and the software programming, and has realized its function and the major technique target through the debugging. In systems hardware part, has designed by the monolithic integrated circuit smallest system for the core, through the connection design, expanded the DAC transformation module, the pressed key and the LED display module. And, used two piece of DAC0832 to realize Entire digitized frequency synthesizer (i.e. DDS). Systems software design is under the keil uVision4 integrated development environment, used the C language to complete the application system software programming, including the master routine, had four kind of commonly used computer modules and so on signal procedures, pressed key function and demonstration subroutine; The modular programming enables the procedure to have the characteristic which the readability and easy to maintain. Finally, the author designed and has manufactured function generator