LXI标准网络管理功能的研究及改进

Research on network management capabilities and improvements of LXI standard

LXI是基于以太网的自动测试系统总线标准,其网络管理功能采用SNMP协议。本文分析了SNMP协议的原理、数据表示和帧结构,在ARM核的LM3S8962硬件上基于LWIP协议栈实现了SNMP协议,研究了结合FLASH和XML技术实现网络管理功能的原理和方法并设计实现,进而比较了两种实现网络管理功能的方法,并通过增加网络复位和查询设备物理地址等功能进行验证。结果表明,其分析正确、实现合理、功能准确,可应用于LXI标准的仪器设备开发中。

LXI is LAN-based ATS bus which uses SNMP protocol as network management capabilities. This paper examines the SNMP protocol, representations of data and frame structure, implements the SNMP protocol on ARM-cored LM3S8962 hardware on base of lwip protocol stack, researches the principles mad methods of combining Flash with XML technologies for network management, and designs the implement which furtherly compares two implementations of network management. By increasing network reset and query device physical address features, the test is devised and the result indicates the correct analysis, reasonable design, reasonable implement and right function that can be used in LXI design.