支持双重触发的μC/OS-II内核的设计与实现

Design and Implementation of μC/OS-II Kernelfor Double-Triggered Mechanism

摘要:

针对当前大多数嵌入式操作系统不能同时支持时间和事件双重触发的机制,对μC/OS-II内核进行了深入研究,对μC/OS-II的调度代码进行了分析,提出了将系统内核架构设计为上下两层,以时间触发部分为上层主要模块,事件触发部分为下层基础模块的层次性架构。从而使得系统核心的调度器即可以调度TT任务也可以调度ET任务；实验证明,该方法不仅能够支持时间和事件双重触发的任务调度,而且在不影响可靠性和确定性的情况下,提高了系统的灵活性和实时性。

Abstract:

At present, most of the embedded operating system cannot support both time-triggered and event-triggered mechanism. This paper analyzed the kernel of μC/OS-II in deeply and the scheduling code , designed the kernel architecture into two layers, the upper layer is the time-trigged module and the lower is the event-trigged module. The time-triggered partition is the main processing section and the event-trigged partition is the base module section. This make the scheduler of the system not only dispatching the time-triggered tasks but also scheduling the event-trigged tasks. Experiments show that this method can not only support the double-triggered mechanism forμC/OS-II , but also improve the real-time performance and flexibility without affecting the reliability and certainty of the system.