SMALL LOW-POWER EMBEDDED SYSTEM AND PREEMPTION AVOIDANCE METHOD THEREOF

摘要

A small low-power embedded system and a preemption avoidance method thereof are provided to avoid preemption of a task based on dual priority scheduling while guaranteeing simultaneous operations of tasks. At least one periodic task is registered in a periodic run queue(110). At least one aperiodic task is registered in an aperiodic run queue(120). At least one device is used in running the periodic and aperiodic tasks. A scheduler(150) periodically runs a periodic task of the periodic run queue. The scheduler periodically runs an aperiodic task of the aperiodic run queue. The scheduler runs the periodic task and the aperiodic task by avoiding preemption of a task based on dual priority scheduling while guaranteeing simultaneous operations of tasks.