μC/OS-Ⅱ系统中任务调度与监控机制改进  

Improvement of Task Scheduling and Supervision Mechanism in μC/OS-Ⅱ System

作　　者：吴永明[1] 罗海据[1] 

机构地区：[1]广东工业大学机电工程学院,广州510006

出　　处：《计算机工程》2009年第12期266-268,共3页Computer Engineering

基　　金：广东省科技计划基金资助项目(2005B50101011)

摘　　要：针对μC/OS-Ⅱ系统的任务调度机制局限于只能按照优先级顺序执行,其任务监控机制可能因外界接口环境异常而出现死锁等问题,提出一些改进方法,包括在系统中增加一个负责任务调度的优先级最低的任务,以便灵活控制任务的调度。增加时间限制变量来控制任务的执行时间,以避免任务发生死锁时导致整个系统的崩溃。该系统已应用于一款按摩椅产品的控制系统之中,结果证明这些方法是实用可行的。In the μC/OS-Ⅱ system, the task scheduling mechanism is to execute tasks just according to the tasks＇ priority, and the task supervision mechanism may happen unexpected dead-lock accidents because of abnormities of interface to outside environment.In order to solve these problems, some improvement methods are proposed. A new task having the lowest priority is added to the system to take charge of task scheduling agilely, and a variable of time limitation is added to the rusk data structure to control the task running time for avoiding system breakdown when the task dead-lock happens. The improved system is applied to a massage-chair control system successfully. It illustrates the proposed methods are feasible.

关 键 词：任务调度 任务监控 嵌入式操作系统 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]