USB OHCI控制器中链表处理研究

Research on List Process in USB OHCI Controller

通用串行总线(USB)作为一种灵活的高速总线接口技术,在许多嵌入式系统中得到广泛应用。当在一个系统设计中使用USB主机接口时,避免不了对其进行驱动编程的问题。以OHCI控制器为例,分析在OHCI控制器最为重要的数据链表处理部分,结合USB规范对其中的数据处理流程作深入分析。

As a flexible and high speed bus interface technique, Universal Serial Bus is widely use in embedded system. Whenever use USB host interface in system design, it＇s unavoidable to solve the problem of driver program. Take OHCI controller as an example and analyze the data list process unit which is the most important section in OHCI controller.