USB 3.0控制端点的功能验证方法

根据USB 3.0协议,提出一种可用于指导USB 3.0设备控制器IP核控制端点的功能验证的方法。以控制端点和控制传输的功能及特点为基础,从测试平台的搭建出发,按照控制传输的设置阶段、数据阶段和状态阶段分别给出了USB 3.0主机和设备的控制端点之间的交互所必须遵循的规则。另外,整个验证流程采用流程控制状态机来加以控制。最后以一款USB 3.0设备控制器IP核作为测试对象,对该验证方法进行了实践检验,验证结果显示该验证方法可以用于指导USB 3.0设备控制器IP核控制端点的功能验证工作。

Study of functional verification for control endpoint of USB 3.0

Aiming at the functional verification for the control endpoint of USB 3.0 device controller IP core, a test methodology is proposed according to USB 3.0 specfication. This paper focuses on the design of testbench and the inter- action rules between the control endpoints of USB 3.0 host and device in setup stage, data stage as well as status stage in control transfer. The feature and function of control endpoint and control transfer are the basic points that should be con- sidered. Besides, the process control state machine controls the whole verification process. The methodology is test on an USB 3.0 device controller IP core. And the simulation result shows that the methodology can be used for the functional verification for the control endpoint of USB 3.0 device controller IP core.