看门狗在实际应用中的问题分析及对策研究

Analysing and Researching on Problems and Measures of Watchdog Applied in Practice

看门狗技术是计算机控制系统抗干扰设计的一个主要措施。本文分析了在实际应用中看门狗存在的自身失效问题和由于看门狗复位对微机系统的影响问题,探讨了问题发生的机理并提出了相应的解决方案。实例证明本文提出的措施可有效增强微机控制系统的运行稳定性。

Watchdog technique is a major measure for computer control system anti-jamming. In this paper we analyze the problems caused by watchdog＇s own failure and the influence of watchdog resetting on the microcomputer system in practice, then explore the principle of the problems and the corresponding solutions. Examples have proved that the measure proposed in this paper can effectively enhance the operating stability of microcomputer control system.