毕业设计--基于AT89S52单片机信号发生器的设计

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1、 基于 AT89S52 单片机信号发生器 的设计 基于 AT89S52 片机信号发生器的设计 I 摘要摘要 采用直接频率信号合成器(DDS)与单片机(MCU)相结合的方法,介绍 ADI 公司出品的AD9850 芯片,给出芯片的引脚图和功能。并以单片机 AT89S52为控制核心设计了一个串行控制方式的正弦信号发生器的可行 性方案,给出了单片机AT89S52与AD9850连接电路图和调试通过的源程 序以供参考。该电路设计方案正确可行,频率容易控制,操作简单灵活, 且具有广阔的应用前景。详细介绍了DDS基本原理、系统方案构成、硬 件电路设计和软件设计。 通过严格的实测数据分析表明该设计是可运行 的。

2、 关键词关键词: AT89S52 AD9850 直接频率合成技术 信号发生器 基于 AT89S52 片机信号发生器的设计 II Abstract Abstract The way is used which combines the Direct Digital Synthesizer(DDS) and Main Computati0nal Unit(MCU) to design afunction signalgenerator.AD9850 which is produced by ADI Company is int roduced ,then the pins diagram and

3、function are given. And the control of a serial control sinusoidal signal generator by the core of single chip AT89S52 is designed ,at the same time ,the circuit connect diagram between AD9850 and AT89S52 ,and feasibility of the program for reference are proposed. This circuit design project is corr

4、ect and feasible, it is easy to control the frequency, simple and flexible to work, it also has broad application prospects . The principle and system components of DDS is introduced. It also introduces the methods which design the hardware circuit and software .It shows a success design by the data which come from the strict experiments. Keywords : AT89S52 ,AD9850 ,DDS ,signal generator 基于 AT89S52 片机信号发生器的设计 III 目录目录 摘要. I Abstract II 目录. III 前言. 1 1 DDS 概述 . 3 1.1 DDS 结构 . 3 1.1.1 频率预置与调节电路