基金会现场总线高速硬件调度器设计

Design on High-speed Hardware Scheduler of Foundation Fieldbus

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。

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.