摘要： 针对软件调度方式效率低、抖动大等缺陷，提出一种通用的硬件调度方法，以实时操作系统任务调度和基金会现场总线通信调度器2种应用为例，给出其设计方法和工作原理，并将硬件与软件调度方式分别在现场总线应用上进行实现，实验结果表明，硬件调度方法可在绝对完成时间和抖动方面获得较大性能提升。

关键词: 基金会现场总线, 硬件调度器, 链路活动调度器, 链路主设备, FBC0409芯片

Abstract: Aiming at the weaknesses of software-based scheduler such as low speed, big jitter and low efficiency, this paper proposes a general scheduling method based on hardware. Taking the applications in real-time operating system and in Foundation Fieldbus(FF) scheduler as examples, the design methods and working principles are discussed, and software-based and hardware-based schedulers’ efficiency are compared, whose result proves that hardware-based scheduler is more efficient in absolute speed as well as in jitter erasing.

Key words: Foundation Fieldbus(FF), hardware scheduler, Link Active Scheduler(LAS), link master, FBC0409

中图分类号: 

• TP303