基于双CPU和RS-485总线的多路信号测控系统的设计

Design of Multiplex Signals Tracking System Based on Dual CPU and RS-485 BUS

简要介绍了一个多路信号测控系统的硬件结构和软件组成。系统硬件结构的特点是:主控单元由两个高速单片机和双口RAM构成,其中一个单片机负责数据处理,一个单片机负责系统通信。多个带CPU的I/O处理单元与主控制单元之间利用RS-485总线进行互联,完成现场数据的输出输入控制。系统软件包括人机界面和现场控制程序两个部分,并主要应用中断方式实现各个CPU的联动控制。

The Hardware and software of a multiplex signals tracking system is briefly introduced in this paper. The design feature of the system hardware is ： main control unit is made up of two high speed singlechips and dual port RAM, one singlechip take charge of data processing, one singlechip take charge of communication. I/O units having CPU is connected to the main control unit with RS -485 bus, to complete the I/O data control. The system software consists of two parts, one is man - machine interface, one is on - site control program, and mainly use interrupt mode to realize linkage control of every CPU.