摘要
通过介绍USB主机驱动的体系结构以及USB摄像头的工作原理,研究和分析了实际系统中USB摄像头和USB鼠标数据传输带宽冲突所造成的花屏、死机的问题和原因。从减小冲突的影响和降低传输带宽需求这两个方面出发,提出并实现了三种解决USB传输带宽冲突问题的方法。实验证明,综合使用这三种方法就能够有效地解决带宽冲突带来的花屏、死机问题,使USB摄像头和USB鼠标在复杂的实际应用系统环境中能够正常地协同工作。
This paper introduced the architecture of USB host system driver and the working flow of the USB camera, and investigated the reason of the USB camera and USB mouse＇ s data transfers bandwidth collision. The collision destroied the image data which was transferred from the USB camera and caused the system breakdown. The paper gave three methods about weakening the influence of the collision and reducing the request of the transfer bandwidth to deal with the problem. The result of the experimentation proves the integration of three methods can effectively solve the bandwidth collision and makes USB camera and USB mouse work together normally.
出处
《计算机应用研究》
CSCD
北大核心
2007年第10期279-281,294,共4页
Application Research of Computers
基金
四川省科技厅攻关基金资助项目(2006Z01-019)
