一种有效监控及过滤1394总线消息的设计实现  

Design and Implementation of an Effective Monitor and Filter 1394 Bus Message

作　　者：王宣明[1] 田泽[1] 魏美荣[1] 牛少平[1] 徐文进[1] 

机构地区：[1]中国航空计算技术研究所,陕西西安710068

出　　处：《计算机技术与发展》2015年第7期155-157,共3页Computer Technology and Development

基　　金："十二五"微电子预研(51308010601;51308010701);总装预研基金(9140A08010712HK6101)

摘　　要：IEEE 1394总线已成功应用于航空领域,机载1394总线监控(BM)节点需从监控到的所有总线消息中提取关系到飞行安全的关键数据,提交给上层应用软件进行实时处理。实现该需求的核心是从监控到的消息中提取标识其类型的ID信息,并检查与期望值是否匹配。但期望监控的消息种类多达数千种,如采用传统方法使用CAM表的方法来检查匹配,需耗费极大的硬件资源。文中提出一种分组轮询的方法,可用更少的硬件开销来获取匹配结果。实验结果表明,该方法可有效降低硬件资源开销,实现监控过滤1394总线消息。With the IEEE-1394b successfully applied in aviation field,bus monitor node need to extract the key data related to flight safe- ty from all the bus information, and then submit to the upper layer software for real-time processing. To meet the requirements, the key point is to check if the message ID which is extracted from monitor message matches the expected value. But expected monitoring infor- mation is thousands of varieties, for example, the traditional method checks the matching using CAM table, which takes a great deal of hardware resources. In this paper,put forward a method of multi-team search for specific messages. Experimental results show that the method can filter and monitor specific 1394 message in the cost of less hardware resources.

关 键 词：总线监控 过滤监控 CAM 分组轮询 

分 类 号：TP39[自动化与计算机技术—计算机应用技术]