基于DMA的1394总线高速数据传输实现  

Implementation of high-speed data transmission of IEEE1394 bus based on DMA

作　　者：马进[1] 王伟[1] 杨煜普[1] 

机构地区：[1]上海交通大学自动化系,上海200240

出　　处：《计算机工程与设计》2010年第20期4410-4413,共4页Computer Engineering and Design

基　　金：国家973重点基础研究发展计划基金项目(2004CB720703)

摘　　要：为了提高数控系统数据传输速度,满足高速高精度加工需求,提出了基于直接存储器存取(DMA)方式的1394总线传输方法。设计了数控系统传输模块,并利用数控系统的结构特点,选定DMA方式并引入RTX(real time extension)软件来提高上位机Windows系统的实时性。根据1394OHCI协议开发DMA程序来实现异步数据的传输,实验结果表明了1394总线通信的实时性和可靠性。To increase the speed of data transmission in CNC system which achieves high speed and precision operation,an application of IEEE 1394 bus with DMA mode is presented.The transmission module of CNC system is designed and DMA mode is selected in the structure of CNC system.Software RTX is used to improve real-time performance of Windows system in host computer.The DMA program with 1394 OHCI protocol is developed to achieve asynchronous data transmission.The real-time and reliability of data transmission by communication experiments is validated.

关 键 词：IEEE1394总线 直接存储器存取 实时性 数控系统 开放式主机控制接口协议 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]