基于LM3S811的时间触发多任务调度器设计

摘要

Multi-task scheduling is one of the key issue for embedded system. Time-triggered mode has some advantages such as the features of being real-time and highly predictable. In this paper, a novel time-triggered mode multi-task scheduler is de-signed. A structure of time schedule is proposed which consists of time processes and task status. The time process indicates the task period, and task status indicates the ready state of a task. The system status transferring is controlled by state transfer func-tion. Finally, the ball game is designed on LM3S811 hardware platform with time-triggered mode.%多任务调度是嵌入式系统的关键问题之一,时间触发具有实时性和时间可预见的特点.本文设计时间触发模式多任务调度器,提出一种包含时间进程和任务状态的时间表结构,以时间进程映射任务周期,以任务状态标识任务就绪,以状态传递函数来控制系统状态转移.结合LM3S811硬件平台,实现了接球游戏中的时间触发模式调度器设计.