USB's WDM Driver Development Based on DDK

Because of USB's many merits,it's widely used in PC's interface design;therefore developed a new alignment system based on USB.Compared with traditional alignment systems,the new one's stability improves a lot,and its cost reduces drastically.But the driver's development of USB device was the key and nodus of the whole system.Introduces some key data structures related to USB's WDM driver in detail based on the framework of WDM and USB's corresponding model and combined with figures,and analyses some problems in the development process in depth.Finally,introduces the flow of driver development and other related notices.New system's practical performance shows that the driver developed meets requirement.