实时控制系统上—下位机间的双向中断通讯

DUAL-DIRECTION INTERRUPTED COMMUNICATION BETWEEN UPPER AND LOWER LEVEL COMPUTERS IN THE REAL-TIME CONTROL SYSTEMS

探讨了在实时控制系统中实现上一下位机间双向中断通讯的原理与方法;阐述了通讯接口的构成。着重研究在实时控制过程中进行双向中断定时通讯的具体实施方法,并详细叙述了上下位机通讯软件的设计思路与技巧。实践表明,在实时控制系统中采用双向中断通讯方式,较一般文献中介绍的一方查询、一方中断的通讯方式具有明显的优越性。

Abstract: An advanced technique has been successfully developed for communication between the up- per and lower level computers in a two-grade microcomputer control system. Not only the structure of communication interface but also the software design procedures of communication between upper and lower level computers is expounded. Discussion will centre on the working process of dual-direction in- terrupted timing communication in real-time control systems. It has been proved that the above com- munication method is obviously superior to the one commonly seen in literatures, in which interroga- tion is adopted on one side while interruption is adopted on the other.