VxWorks下基于辅助时钟的通用定时器设计

VxWorks操作系统以其强实时性、可剪裁性等特点得到了广泛应用,但其并未提供通用的定时器模块。为解决某机载发射装置控制盒中VxWorks系统的精确定时问题,文中在分析多种定时方式的基础上,利用辅助时钟中断,通过创建定时节点,构造节点链表,设计了基于辅助时钟的通用定时器模块。经测试表明,该模块实现了毫秒级定时,满足了某发射装置的定时需求,并为今后类似系统的精确定时需求提供了方便。

Design of a General Timer Based on Auxiliary Clock in VxWorks

The OS of VxWorks finds wide applications owing to its good real-time performance and flexibility, but it dose not offer a common timer. This paper designs a common timer module based on auxiliary clock on the base of analyzing of several timers by utilizing interrupt of auxiliary clock and creating time-node and node list for an accurate timer for VxWorks system in certain airborne launcher＇s controller. Testing results show that the common timer module realizes the ms-timer, which satisfies the requirement of accurate timer for certain airborne launcher＇s controller.