基于PXI总线的RS422通信卡的设计与应用  

Researching and Designing of A RS422 Correspondence Card Based on PXI

作　　者：王玉铭[1] 周强[1] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100083

出　　处：《计算机测量与控制》2008年第12期1924-1925,1942,共3页Computer Measurement &Control

基　　金：国家自然科学基金项目(60775059);863项目(2006AA04Z218)。

摘　　要：设计实现了基于PXI总线和SC28L202的4通道RS422通信卡。详细介绍了该RS422通信卡的功能组成和硬件原理;重点讨论了使用SC28L202实现4通道RS422数据的发送和接收、中继时间可控性、波特率配置以及Windows2000/XP下WDM设备驱动程序的设计与实现;同时,对RS422通信卡的测试实验和结果进行了总结和分析;文中研制的基于PXI总线的4通道RS422通信板卡在实际的航空测试工程项目中得到了很好的应用。Researching and Designing of RS422 correspondence card with 4 channels based on PXI bus and SC28L202 is the important part of this paper. Components of hardware and characters of card are introduced in detail. Using SC28L202 to design RS422 card with 4 channels, control of interrupt time, configuration of baud rat when sending or receiving data, and designing of WDM driver of Windows2000/ XP is discussed in the paper. The experimental results are summarized and analyzed. The correspondence card with 4 channels is meeting the design requirements and being used in the actual aviation test projects.

关 键 词：RS422 PXI SC28L202 中断处理 WDM驱动模型 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]