CM3上μC/OS-Ⅱ任务切换和通信机制的应用  

Research on application of task switching and inter-task communication of μC/OS-Ⅱ on CM3

作　　者：胡平平[1] 王晶杰[1] 

机构地区：[1]北京信息科技大学自动化学院,北京100192

出　　处：《北京信息科技大学学报（自然科学版）》2014年第5期36-40,共5页Journal of Beijing Information Science and Technology University

基　　金：北京市重点学科建设项目资助(PXM2014-014224-000018)

摘　　要：针对μC/OS-II系统任务调度处理的局限性,以对Cortex-M3上μC/OS-II源代码的分析为基础,提出了任务切换和任务间通信不可分割的观点,给出了利用任务间通信机制协调多任务运行以解决任务管理局限性的方法,分析了系统各种通信类型的特点,给出了其应用原则和使用方法。由此说明任务间通信在实现多任务协调运行中的重要性,并论证了通信机制的正确使用可以解决大多数系统任务调度局限性带来的问题。Based on analysis of μC/OS-Ⅱ source code on Cortex-M3, methods are proposed to overcome the limitation of task scheduling of μC/OS-Ⅱ system by making full use of inter-task communications from the view of indivisibility of task switching and inter-task communication. The characteristics of each inter-task communication are analyzed, and the principles and usages of their application are given in detail. The importance of inter-task communication in coordinating the multi-task working is proved. It is demonstrated that most problems caused by task scheduling limitation of μC/OS-Ⅱ can be avoided by proper use of inter-task communication.

关 键 词：μC/OS-Ⅱ 任务切换 任务间通信 信号量 邮箱 

分 类 号：TP361.84[自动化与计算机技术—计算机系统结构]