摘要
为了和通用的嵌入式处理器协同工作,在EHCI协议的基础上对传输描述符和调度策略进行优化会更加有利于实现没有总线控制权的嵌入式USB主机。在简单剖析了EHCI协议的调度思想后给出了软硬件划分结构和实现方法,软硬件协同仿真结果证实了设计的正确性。
In order to cooperate with the common embeded processors, optimizing the transfer descriptor and the schedule policy can favor to realize the embeded USB host controller without bus master capability. This paper discusses the EHCI protocol, following one feasible division between software and hardware,and the implement methods, simulating and debugging result have confirmed＇the validity.
出处
《电子技术应用》
北大核心
2007年第11期41-43,共3页
Application of Electronic Technique
