双通道波形发生器 基于单片机的波形发生器设计.docVIP

双通道波形发生器 基于单片机的波形发生器设计 导读：就爱阅读网友为您分享以下“基于单片机的波形发生器设计”资讯，希望对您有所帮助，感谢您对92的支持! 摘要 本系统是基于AT89C51单片机的数字式低频信号发生器。采用AT89C51单片机作为控制核心，外围采用数字/模拟转换电路（DAC0832）、运放电路（LM324）、按键和LCD(1602)等。通过按键控制可产生正弦波、方波、三角波等，同时用1602液晶指示其对应的波形类型、重复频率（周期）、幅度的功能。其设计简单、性能优好，可用于多种需要低频信号的场所，具有一定的实用性。 各种各样的信号是通信领域的重要组成部分，其中正弦波、方波和三角波等是较为常见的信号。在科学研究及教学实验中常常需要这几种信号的发生装置。为了实验、研究方便，研制一种灵活适用、功能齐全、使用方便的信号源是十分必要的。 本文介绍的是利用AT89C51单片机和数模转换器件DAC0832产生所需不同信号的低频信号源，其信号幅度和频率都是可以按要求控制的。文中简要介绍了DAC0832数模转换器的结构原理和使用方法，AT89C51的基础理论，以及与设计电路有关的各种芯片。文中着重介绍了如何利用单片机控制D/A转换器产生上述信号的硬件电路和软件编程。信号频率幅度也按要求可调。 本次关于产生不同低频信号的信号源的设计方案，不仅在理论和实践上都能满足实验的要求，而且具有很强的可行性。该信号源的特点是：体积小、价格低廉、性能稳定、实现方便、功能齐全。 关键词 ：AT89C51 DAC0832 LM324 LCD 1 Abstract This system is based on AT89C51 microcontroller digital low-frequency signal generator. Using AT89C51 microcontroller as control core, the external digital / analog conversion circuit (DAC0832), op-amp circuit (LM324), buttons and LCD (1602) and so on. Through key control can produce sine, square, triangle, etc., while with 1602 indicate the type of the corresponding waveform, repetition rate (period), amplitude function. Its simple design, excellent performance, and can be used for a variety of needs of low-frequency signal place, has a certain practicality. Variety of signal is an important part of communication, including sine, square and triangular wave signals such as is more common. Experiments in scientific research and teaching is often necessary to signal the occurrence of these types of devices. To experiment, to facilitate research, develop a flexible application, full-featured, easy to use source is necessary. This article describes the use of AT89C51 microcontroller and the DAC0832 digital to analog converter to generate the required pieces of different low-frequency signal source, the signal amplitude and frequency can all be controlled as required. This paper briefly describes the structure of DAC0832 DAC principles and use, AT89C51 basic theory, as well as a variety