基于DSP和VXI-11协议的LXI仪器控制与实现

Design and Implementation of Controlling LXI Instrument using VXI-11 Protocol in Embedded DSP Platform[HS)]

摘要:

为实现嵌入式系统对LXI仪器的远程控制,采用DSP芯片扩展DP83848C以太网接口芯片的硬件方案和基于简化TCP/IP协议及RPC协议支持的软件方案,在分析TCP连接过程、RPC调用流程和VXI-11协议工作过程的基础上,设计实现了支持VXI-11协议的嵌入式硬件平台和控制软件；以R&S SMB100A微波信号源为被控对象的实验测试及数据分析结果表明,文中的硬件平台和控制软件可以根据协议工作时序正确发送控制数据包,LXI仪器可以正确响应嵌入式端的远程控制命令；文章提出的基于DSP和VXI-11协议的LXI仪器控制方案即可以用于实现分布式、低成本、灵活性较高的自动测试系统,也可以用于LXI仪器控制的桥接方案设计。

Abstract:

In order to control LXI instruments remotely by embedded system, a DSP system with extend DP83848C Ethernet interface is designed as well as software based on simplified TCP/IP protocol and RPC protocol. The TCP connection procedure, RPC call procedure and principle of VXI-11 protocol are analyzed. Hardware and software platform supporting VXI-11 protocol are provided. Experiment and data analysis results using R&S SMB100A microwave signal generator show that the hardware and software platform in this paper can send appropriate data package according to protocol time sequence, LXI instrument response the remote control command properly. Design scheme provided in this paper can be used to integrated distributed, low cost and high flexible ATE system and in bridge connection circumstance .