All items contain a 1-byte prefix which denotes the basic type of the item. The HID class defines two basic formats for items: 所有项都包含一个1字节的前缀 ,用于标识该项的基本类型。HID 类为项定义两种基本格式: S...
描述 格式 注释 描述 A Collection item identifies a relationship between two or more data (Input, Output, or Feature.) For example, a mouse could be described as a collection of two t...
The Host Controller Communications Area (HCCA) is a 256-byte structure of system memory that is used by system software to send and receive specific control and status information...
Figure 3-1 shows four main focus areas of a Universal Serial Bus (USB) system. These areas are the Client Software/USB Driver, Host Controller Driver (HCD), Host Controller (HC), ...