说明：  给出Linux 环境下USB驱动的模块层次结构，包括主控制器驱动、USB 核心驱动和USB设备驱动程序组成，以及USB 接口摄像头驱动模块的层次结构，对底层usbvideo 模块进行分析，对usbvideo 中的函数进行了分类，修正其设计上的一个缺 陷，给出上层微型驱动的实现，最后通过移植USB 摄像头驱动程序到三星公司的SMDK2410 开发板的试验成功，使该驱动成 功应用在基于Linux 的嵌入式系统上。
(Given Linux environment USB drive module hierarchy, including the host controller driver, USB core driver and USB device drivers, as well as camera USB interface drive module hierarchy of the underlying module usbvideo analysis, in usbvideo function of classification, to amend the design of a defect, given the realization of the upper micro-drive, and finally through the transplantation driver USB camera to Samsung SMDK2410 development board of the experiments are successful, so successful application of the driver in the Linux-based embedded systems.)