单片机控制的波形发生器

单片机控制的波形发生器

文档编号:DZXX062 文档字数:10474,页数:31

摘要
系统是由单片机控制的波形发生器。波形发生器作为一种测试设备正在大规模、超大规模集成电路芯片测试和数字系统设计中获得广泛的应用。本设计的系统可以实现标准波形的发生功能、包括幅值、频率功能设定。为了充分实现这些功能，还扩展了键盘输入功能，用于调节输出信号。
本系统对于波形的幅值和频率的调整主要由软件实现，首先用MAX038搭建一个波形发生电路，然后用单片机控制这个波形发生电路，且读入用户根据自己的需要由键盘所输入的数据，由软件实现波形的变化，由DAC083实现D/A转换。该发生器输出有正弦波、三角波、方波三种信号波形，输出信号的频率在范围为1Hz~1KHz范围内通过程控的方法进行调节，最大幅值3V,输出波形稳定，失真度很小。

关键字：单片机，波形发生器，max038

ABSTRACT

The system is the wave generator which controls by the monolithic integrated circuit. The wave generator took one kind of test facility large-scale, the ultra large scale integrated circuit chip test and in the digital system design obtains the widespread application. This design system may realize the standard wave pattern occurrence function, including the peak-to-peak value, the frequency function hypothesis. In order to fully realizes these functions, and expanded the keyboard entry function, uses in to adjust the output signal.
This system mainly realizes regarding the wave peak-to-peak value and the frequency adjustment by software, First uses MAX038 to build a profile to have the electric circuit, Then controls this wave with the monolithic integrated circuit, also the read-in user according to own need the data which inputs by the keyboard, by the software realization wave change, realizes the D/A transformation by DAC0832. This generator output has the sine wave, the triangle wave, the square-wave three kind of waveform, the output signal frequency in the scope is in the 1Hz~1KHz scope, greatest peak-to-peak value 3V carries on the adjustment through the program control method, the output is stable, the degree of distortion is very small.
Key words: mcu wave generator max038

目录
摘要 I
ABSTRACT II
第1章绪论 1
1.1 课题背景及重要意义 1
1.1.1 课题的背景 1
1.1.2 课题的意义 2
1.2 课题设计的目的及目标 3
第2章器件和使用原理 4
2.1 MAX038简介和使用说明 4
2.2 DAC0832简介和使用说明 6
2．3 AT89C51单片机简介 8
第3章系统硬件设计 11
3.1 单片机与按键电路设计 11
3.2 MAX038外围电路设计 12
3.3 DAC0832外围电路设计 14
第4章系统软件设计 16
4.1 软件设计概述 16
4.2 波形的选择 17
4.3按键模块 18
4.3.1按键的识别 18
4.3.2按键消抖问题 18
4．4单片机控制DAC0832模块 19
第五章总结 21
致谢 22
参考文献 23
附录A 24
附录B 25

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