WDM驱动程序中直接内存访问(DMA)方式的设计和实现  

A DESIGN AND ITS IMPLEMENTATION OF DIRECT MEMORY ACCESS BY WDM DEVICE DRIVER

作　　者：汪红[1] 刘乐善[2] 

机构地区：[1]中南民族学院计算机科学系,武汉430074 [2]华中科技大学计算机科学与技术学院,武汉430074

出　　处：《计算机应用与软件》2002年第6期35-37,共3页Computer Applications and Software

摘　　要：Windows 98及2000中采用WDM这种新的模式实现设备的驱动,用户通过设备驱动程序访问设备时可以使用两种方式,即中断或直接内存访问(DMA),这两种方式的实现机理不同,达到的效果也有差别。本文根据实践经验,分析并总结了WDM驱动程序中DMA方式的设备访问过程,探讨了采用DMA技术实现高速数据传输的基本原理。WDM,being a new model,has been adopted to accomplish a device drive in Windows98 and Windows2000. User can access a device by device in one of two ways, interrupt or DMA. The two mechanisms are different and so are their effects. In this paper, we analyzed and summarized the procedure of accessing a device in the way of DMA by the WDM driver, and probed the basic principle of DMA technology which can transfer data at a great rate.

关 键 词：WINDOWS98 WINDOWS2000 操作系统 WDM驱动程序 直接内存访问 设计 

分 类 号：TP316.7[自动化与计算机技术—计算机软件与理论]