嵌入式硬件看门狗监控方法的研究  

Research on Watchdog Monitoring Method of Embedded Hardware

作　　者：刘博 杨磊 赵彬智 LIU Bo;YANG Lei;ZHAO Bin-zhi(Xi′an Aeronautics Computing Technique Research Institute,AVIC,Xi′an 710000,China)

机构地区：[1]中国航空工业集团公司西安航空计算技术研究所,陕西西安710000

出　　处：《航空计算技术》2025年第2期112-114,120,共4页Aeronautical Computing Technique

基　　金：航空科学基金项目资助(2018ZC31003)。

摘　　要：针对嵌入式计算机系统的可靠性应用,对嵌入式硬件看门狗监控方法进行了研究。介绍了三种典型的看门狗设计方法:看门狗芯片、处理器WDT和可编程看门狗定时器,看门狗芯片和处理器WDT采用现有芯片实现,功能固定、实现简单,可编程看门狗定时器设计难度大、可灵活定义功能,三种方法可以在不同场景下组合使用。研究了FT-2000/4最小处理系统的看门狗监控设计应用,设计实现了FT-2000/4最小处理系统的FPGA可重加载和看门狗定时器,能够监控FPGA芯片工作状态和系统工作状态,提高了整个系统的可靠性。Aiming at the reliability application of embedded computer system,this paper studies the watchdog monitoring method of embedded hardware.This paper first introduces three typical watchdog design methods:watchdog chips,processor WDT and programmable watchdog timer.The watchdog chip and processor WDT are implemented by existing chips,with fixed functions and simple implementation.The programmable watchdog timer is difficult to design and can flexibly define functions.The three methods can be combined in different scenarios.Then,the design and application of watchdog monitoring in FT-2000/4 minimum processing system is given.The FPGA reloadable and watchdog timer of FT-2000/4 minimum processing system are designed and realized.The design can monitor the working status of the FPGA and the system,and improve the reliability of the entire system.

关 键 词：可靠性 看门狗芯片 看门狗定时器 最小处理系统 可重加载 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]