随着嵌入式电子产品越来越多的应用，实时性操作系统VxWorks得到广泛应用，而定时器正是实时性操作 系统中不可或缺的重要组件。-As the development of embedded electronic products, the RTOS VxWorks gets wide application, and timer is an indispensable important component in RTOS. Based on the VxWorks Watch Dog