:分析了VxWorks 下的USB 驱动程序模型的结构以及功能,详细说明USB 主机驱动协议栈,并将软件设计分为

Client Driver ,USBD 和HCD 三层。由于对于开发USBD 和Client Driver 已有很多研究和讨论,但对HCD 的研究比较缺乏,

为了提供全面可行的开发基于VxWorks 的USB 驱动程序的技术方案,详细地阐述了USB 主控制器OHCI 驱动程序的功

能、OHCI 驱动程序中的核心功能链表功能,为USB 在嵌入式系统开发中的应用提供技术参考。-: Analysis of VxWorks USB Driver Model structure and function, detailed descr iption USB mainframe-driven protocol stack and software design into Client Driver, USBD and HCD three. As for the development of USBD and Client Driver has been a lot of studies and discussions, But right HCD Research lacking. To provide a comprehensive and workable development based on VxWorks USB Driver for technology programs, expounded in detail on the USB OHCI host controller driver functions, OHCI driver for the core functions of Chain function, USB in embedded systems development for the application of information technology.