关键词: 信息-物理融合系统（CPS）, 嵌入式系统, Java处理器, 异常, 时间指令

Abstract: The physical processes is inherently concurrent and real-time, so to express these characteristics is required when developing Cyber-Physical Systems (CPS). While the traditional computing model for the convenience of the user logic description, along with the abstract degree rise, description on the time characteristic was gradually discarded. On the basis of the embedded Java processor JPOR-32, a clock register and a clock counter were added for the CPS applications in this paper, and combined with the exception mechanisms, four time instructions were extended to face different requirements of the temporal characteristics, which enabled the user to control the time accurately according to different demands. Finally, the feasibility, validity and accuracy of this time control mechanism have been verified by analyzing the running results of the image processing program that uses time instructions in the CPS.

Key words: CPS, embedded systems, Java processor, exception, time instructions