Analysis of the USB Host Driver on an Embedded Computer System

A number of factors including the architecture of the VxWorks operation system,the embedded universal serial bus(USB) system and the USB host stack,are analyzed base on the board support package(BSP) of computer mainboard installed an Intel CPU.We also discusse the relationship between every function level of USB host stack,and describe the characteristics of the structure of such USB driver.The method on the development of USB driver in an embedded computer system is proposed.