【摘要】 介绍了用于铁路列车定位、检修的GPS手持终端中USB接口的特点和USB驱动程序的结构,同时简要介绍了DriverWorks的特点以及利用DriverWorks开发驱动程序的步骤,详细阐述了利用DriverWorks设计驱动程序的具体过程。最后给出了启动DMA操作的例程和USB读操作的流程图。更多还原

【Abstract】 Introduced the characters of the interface of USB for GPS pocket terminal and the structure of USB driver.The terminal was used for train examining and position.Also intrduced simply the character of DriverWorks and the steps of using DriverWorks to developing driver;expounded concretely how to implement USB device driver by using DriverWorks.Lastly,it put forward the program of start DMA and the flow chart of USB read.更多还原