毕业论文--基于单片机函数发生器系统设计.doc

基于单片机函数发生器系统设计 系 别 信息工程系 专 业 班 级 学 号 姓 名 指导教师 负责教师 沈阳航空学2015年月摘 要 关键词： Abstract Function signal generator is an indispensable tool in the process of testing and experiment, the communication, measurement, are widely used in fields such as radar, control, teaching.For convenient experiment, research and develop a flexible to apply, complete function, easy to use the signal source is very necessary.Todays technology and instrument equipment highly intelligent the rapid development of information society, the development and progress of electronic technology, has brought the fundamental change to peoples life.Single chip instrument has high reliability, high cost performance, the intelligent instrument system and is widely used in office automation, as a result, the popularity of function signal generator based on single chip microcomputer is a kind of trend. This system is based on AT89C52 MCU function signal generator.USES AT89C52 single chip microcomputer as control core, periphery adopts digital/analog conversion circuit (DAC0832), the op-amp circuit (LM324), buttons, etc.Using single-chip design of function signal generator with flexible programming, function more diverse practical advantages.Microcontroller design of function signal generator can produce sine wave, sawtooth wave, triangle wave, square wave, and to realize to adjust the frequency, and 12864 LCD display name of waveform and waveform frequency and waveform of the switching frequency and adjust the implementation can use buttons, its design is simple and good performance advantages, can be used for a variety of places that need function signal, has a certain practicality. Keywords: Single chip microcomputer;DAC0832;LCD 16824;LM324 目 录 1 1.1 课题背景和研究的意义 1 1.2 函数发生器的分类 1 1.3 国内外发展状况 2 1.3.1 国内发展现状 2 1.3.2 国外发展现状 2 1.4 课题任务及要求 4 1.4.1 主要内容： 4 1.4.2 技术指标： 4 2 系统方案的设计 5 2.1 方案论证 5 2.1.1 方案1 5 2.1.2 方案2 5 2.1.3 方案比较 6 2.2 系统总体设计 6 3 硬件设计 7 3.1 主控单片机电路 7 3.1.1 AT89C52单片机介绍 7 3.1.2 AT89C