基于STC89C52单片机的数字电压表设计

Design of Digital Voltmeter Based on STC89C52 Single Chip Microcomputer

在如今的各个行业,各个领域我们都会看到数字电压表的身影,大到汽车,电厂,超市,小到手表,电脑,手机等等。可以说我们的日常生活,衣食住行都离不开数字电压表。顾名思义,数字电压表是通过模拟数字转换技术,将模拟电压采集成离散的数字变量,然后通过主控芯片,显示在相关的显示设备上,诸如数码管,LCD液晶屏等等。这种高度集成的以及高度可扩展的嵌入式系统满足了如今各行各业变化多样的需求。该文设计的数字电压表是基于STC89C52单片机的硬件设计及软件设计方法。在设计中,充分利用了STC89C52单片机内部的高速计数器和以MAX197组成的A/D转换器的优良特性^([1]),使整个设计达到了比较满意的效果^([2])。

In the areas now various industries,we will see the form of digital voltmeter,big to cars,power plant,supermarket,small to watch,computer,mobile phone and so on.Can say our daily life,food and clothing live line wit- hout digital voltmeter As the name implies,digital voltmeter is through the analog to digital conversion technolo- gy,the analog voltage acquisition into discrete digital variables,and then through the main control chip,on displ- ay in the relevant equipment,such as digital tube,LCD screen and so on this highly integrated and highly exten-sible embedded systems meet the needs of diverse now all walks of life.The digital voltmeter designed in this paper is based on the STC89C52 microcontroller hardware design and software design methods.In the design, we make full use of the high speed counter in STC89C52 microcontroller and the excellent characteristics of A/D converter composed of MAX197,so that the whole design has achieved satisfactory results.