单片机的多功能信号发生器2011新品 04
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密 惠 保
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密 惠 保
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Abstract
In every field of modern electronics, often need high precision and frequency signal generator can be convenient adjustment. Various waveform curve all can by trigonometric function equation. Can produce various waveform, such as triangle wave, sawtooth wave, rectangle wave (including square wave), the circuit is called sine wave function signal generator. Function signal generator in circuit experiment and test equipment in a very wide range of USES, in automatic control system design and commissioning process, long the sine waves at different frequencies, triangle wave and square-wave often as source. Used by division components and integrated amp constitute oscillators, produce waveform, but this frequency is not high work instability to be washed out gradually.
This paper is based on SCM digital signal generator design, will use digital programming method to realize triangle wave, sawtooth wave, rectangle wave, sine wave occurs. SCM by reading the data sent to internal waveform analog-to-digital conversion chip DAC0832 converts analogue then after integrated operational amplifier amplification into the output waveform. SCM through to the control to achieve DA chip output wave frequency regulation, and able to run the signal parameter real-time display on the screen.
Key word: microcontroller, DAC032, multi signal generator
目录
摘 要... 1
一、概述... 4
1.1选题目的及意义... 4
1.2本课题的研究现状及发展前景... 4
1.3信号发生器的分类... 5
1.4 本课题研究方向及拟解决的问题... 5
二、硬件设计及分析... 6
2.1信号发生器的器件的选取及要求... 6
2.2 设计原理... 7
2.3 设计思想... 7
3.1 对电源电路的设计... 8
4.1AT89C52简介... 9
5.1 DAC0832工作原理... 12
6.1显示电路的设计... 13
7.1按键及其消抖：... 14
8.1 集成运放OP07简介: 15
参考文献... 17
致谢... 18
附录一：程序代码... 19
附录二、 硬件原理图... 42
[资料来源：THINK58.com]
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