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控制系统因具有实时性,决定了其对抗干扰要求的特殊性,既要求当干扰发生时能及时将系统恢复到指定的状态。文章中用51单片机与可编程芯片8253组成的实时控制系统的Watchdog电路,以及用8155中的RAM保存系统的重要信息.两种方法的结合,大幅度的提高了实时控制系统的可靠性。
Because of its real-time control system, determines the particularity of its anti-interference requirements, both require that when the interference occurs in a timely manner to restore the system to the specified state. In the article, the Watchdog circuit of the real-time control system composed of 51 single-chip microcomputer and programmable chip 8253 and the important information of system saved by RAM in 8155. The combination of the two methods greatly improves the reliability of the real-time control system.