数字电压电流表的软件设计

Software Design of Digital Voltage Ammeter

主要采用ATMEGA8芯片和一些外设电路来完成数字电压电流表的设计,能够对输入的0～20 V电压及0～5A电流进行测量,并通过一个四位一体的8段LED数码管进行动态显示.测量精度为0.1％,还可以与PC进行串行通信.设计主要由五大模块组成：量程自动转换模块、A/D模数转换模块、单片机控制模块、显示模块和通信模块.采用ATmega8单片机主控,内设A/D转换器,可直接对输入量进行A/D转换控制.

This design mainly uses the ATmega8 chip and some peripherals circuit to complete the design of digital voltage ammeter, which is able to measure the 0 -30V voltage and current 0 -5 A input signal , and through a four in one of the eight segments LED digital dynamicly display. Pipes can be less than 0.1% measurement precision. It can also communicate with PC serially. This design mainly is made up by five modules： range automatic conversion module, A/D module conversion module, SCM control module, display module and communication module. Using ATmega8 single - chip microcomputer control with A/D conversion function can directly control the inputs by A/D conversion.