C类LXI仪器通用接口模块的硬件设计与实现

发布时间：2018-05-14 10:39

本文选题：LXI + ColdFire　；参考：《哈尔滨工程大学》2012年硕士论文

【摘要】：LXI总线是继GPIB、VXI和PXI等传统测试总线技术之后的第4代测试仪器总线标准，其宗旨是将已经发展成熟的工业以太网通信技术应用到自动测试领域，以便于高速分布式测试系统的组建。论文考查了LXI总线技术的发展背景和LXI标准，并以其为指导，，研究了具有C类LXI仪器接口功能的硬件平台的实现方案。本系统硬件平台是以Freescale ColdFire系列芯片的MCF5282微控制器为核心控制芯片。在该硬件平台中，设计了用于实现外部通信功能的GPIB、USB、UART通信接口以及以太网通信接口，用于程序下载和调试的BDM/JTAG接口以及MCF5282主控模块、系统数据和代码存储模块；实现适用于芯片MCF5282嵌入式系统正常启动和代码加载功能的Bootloader和以太网通信模块的驱动程序在嵌入式操作系统上的移植。在平台设计中，使用Altium Designer作为EDA绘图工具，完成硬件电路原理图和PCB板的设计。研究了电磁兼容技术，选用多层的PCB板，按照模块功能分区进行元件布局，使PCB板整体布线路径最短；采用接地技术和滤波技术来降低地线阻抗，抑制电磁干扰，提高系统的电磁兼容性能。该论文实现的C类LXI仪器硬件接口平台能够将传统总线仪器改造成具有以太网通信功能的LXI仪器。
[Abstract]:LXI bus is the fourth generation test instrument bus standard after the traditional test bus technology such as GPIBN VXI and PXI. Its purpose is to apply the mature industrial Ethernet communication technology to the field of automatic testing. In order to facilitate the establishment of high speed distributed test system. In this paper, the development background of LXI bus technology and the LXI standard are reviewed, and the implementation scheme of the hardware platform with C class LXI instrument interface function is studied under the guidance of it. The hardware platform of this system is based on MCF5282 microcontroller of Freescale ColdFire series chips. In this hardware platform, the communication interface of GPIBBU UART and Ethernet is designed to realize the external communication function, the BDM/JTAG interface for program downloading and debugging, the main control module of MCF5282, the data and code storage module of the system are designed. The driver of Bootloader and Ethernet communication module, which is suitable for the normal startup and code loading of MCF5282 embedded system, is transplanted on the embedded operating system. In the platform design, Altium Designer is used as EDA drawing tool to complete the design of hardware circuit schematic diagram and PCB board. This paper studies the electromagnetic compatibility technology, selects the multi-layer PCB board, carries on the element layout according to the module function partition, causes the PCB board overall wiring path to be shortest, uses the earthing technology and the filter technology to reduce the earth wire impedance, suppresses the electromagnetic interference, Improve the EMC performance of the system. The C class LXI instrument hardware interface platform realized in this paper can transform the traditional bus instrument into a LXI instrument with Ethernet communication function.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP368.1;TN41

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