General Serial Bus USB is a new type of communication standard promoted by companies such as Kangbo, Microsoft, IBM, DEC, etc., which has the advantages of convenient installation, high bandwidth, easy extension, and has gradually become the development of modern data transmission. trend. When developing USB devices, the design of the device driver is an important technical link, which directly affects the performance of the entire equipment system. Windows98 and its higher version of the operating system provide comprehensive support for the USB bus and uses the WDM driver model instead of the VXD device driver. WDM supports USB protocol and provides an efficient development platform. Therefore, WDM has become a technique that is necessary to develop USB peripheral drivers.
