实时操作系统uC/OS-Ⅱ的优先级查找算法研究与改进

Research and improvement of the look-up arithmetic for the priority of the real-time operating system Uc/OS-Ⅱ

针对目前实时操作系统uC/OS-Ⅱ可管理任务数较少的状况,在适当增加查找程序代码且大量减小查找表大小的情况下,提出了2种可行的最高优先级查找方案。它们均可使得uC/OS-Ⅱ在保证实时性的前提下,使其可管理的任务数由64个增加到256个,极大地扩展了uC/OS-Ⅱ的使用范围。并且,改进后的uC/OS-Ⅱ安装在组合仪表系统上取得了良好的效果。

For the fewer tasks which the real-time operating system uC/OS-II manages, this paper proposes 2 available look-up schemes for the highestpriority, which could increase the codes of look-up programs and decrease the size of the look-up table. They can also make the amount of tasks increase from 64 to 256 and expand the service range of uC/OS-lI when they ensure uC/OS-II has the real-time feature. Moreover, the improved system uC/OS-II used to the combined instrument system plays a better role.