基于VxWorks的Compact PCI总线中断机制研究

Compact PCI总线具有热插拔的特性,而使得CPU访问扩展设备的机制与非热插拔系统有较大不同,尤其是中断机制较为复杂,研发人员不仅需深入了解硬件中断结构,更需要掌握PCI设备驱动程序及中断服务的实现方法。本文针对中断的软硬件内容进行了分析研究,以设计的Compact PCI设备卡为例,讨论了利用中断方式和CPU运行的VxWorks操作系统进行数据通信的程序设计要点,从底层全面分析了Compact PCI中断处理机制,旨在为开发人员提供理论指导和编程思想。

Research on the VxWorks-based Compact PCI Interruption Mechanism

The compact PCI is a type of standard computer bus with the characteristics of hot-plugging.This result in the fact that the CPU accesses the extend device in a different way from the non-hot-plugging system,especially that the mechanism of interruption is very complex.Researchers not only need to understand the hardware interruption structure well,but also master the drivers of the PCI device and the implementation of the interruption service.This article analyzes both the software and hardware of interruption,and takes Compact PCI board as an example in the discussion of the programming essentials of communicating information with the CPU which runs VxWorks via interruption,the purpose of which is to have a thorough understanding of the Compact PCI-based interruption mechanism,and to provide theoretical guidance and programming ideas for developers.