PARTOS-11: an efficient real-time operating system for low-cost microcontrollers

Author

Li, Yao ; Wilson, Paul

Author_Institution

Sch. of Electr. & Comput. Eng., Christchurch Polytech. Inst. of Technol., New Zealand

fYear

2002

fDate

2002

Firstpage

235

Lastpage

239

Abstract

An efficient real-time operating system, PARTOS-11, has been developed for a low-speed and small-memory microcontroller, 68HC11. The size of the kernel is 2 Kbytes. Both hard real-time tasks and soft real-time tasks can be run in the system concurrently. The rate-monotonic policy is adopted for scheduling hard real time tasks, which guarantees that all tasks meet their deadline if the condition of Liu and Layland´s theorem is met. A novel model, the Slack Sharing Server (SSS), was proposed and implemented. The SSS is a simple and efficient server for soft real time tasks running together with hard real time tasks in a small real-time embedded system

Keywords

microcontrollers; operating systems (computers); real-time systems; 2 Kbyte; 68HC11 microcontroller; Liu-Layland theorem; PARTOS-11; SSS; hard real-time tasks; low-cost microcontrollers; low-speed microcontroller; rate-monotonic policy; real-time operating system; slack sharing server; small-memory microcontroller; soft real-time tasks; Dynamic scheduling; Embedded system; Hardware; Job shop scheduling; Kernel; Microcontrollers; Operating systems; Processor scheduling; Real time systems; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronic Design, Test and Applications, 2002. Proceedings. The First IEEE International Workshop on

Conference_Location

Christchurch

Print_ISBN

0-7695-1453-7

Type

conf

DOI

10.1109/DELTA.2002.994621

Filename

994621