【作者】 宋慧娟；

【导师】 付平；

【作者基本信息】 哈尔滨工业大学 ， 仪器科学与技术， 2011， 硕士

【摘要】 随着PCI Express技术的发展及其在背板中的应用,PXI Express自动测试系统也迅猛发展。PXI Express以其高性能、低成本、兼容性等特点进入到更多以往被昂贵的专用仪器控制的的高速测试领域。本文设计了基于PCI Express电缆连接的外置控制器,实现了用台式计算机对PXI Express系统的远程控制,在享有台式机高性能的同时能有效应对恶劣的测试环境。本文首先根据PXI Express外置控制器的功能进行了需求分析,制定了总体设计方案。将外置控制器分为两个模块:位于计算机PCI Express插槽的驱动模块和位于PXI Express机箱系统槽的系统模块,二者通过PCI Express电缆连接来实现远程控制。PCI Express驱动模块阐述了高速差分信号的调整技术,通过对高速信号的具体分析,完成了对x4通道PCI Express差分信号和差分参考时钟的驱动处理,以进行远距离传输,该模块同时支持所有的电缆辅助信号。PXI Express系统模块通过介绍PCI Express交换技术,利用交换芯片完成了上游x4链路对下游4x4或8+16 PCI Express链路的扩展,实现了与背板PCI Express链路的透明连接;同时详细分析了时钟分配方案及系统模块其它信号的处理。系统模块中采用FPGA实现了PCI Express接口转换,扩展了PXI触发总线控制器,支持内触发和外触发两种方式;同时支持了系统模块SMBus功能,利用两线制串行总线对背板容量记录的串行EPROM读写,进行背板识别。由于高速信号处理贯穿于整个设计中,本文结合信号完整性理论,对高速信号进行严格的规划和布局布线约束,保证了高速信号的质量。本文最后搭建了PXI Express测试系统,对PXI Express外置控制器套件进行了功能和性能分析。实验结果表明,该控制器的功能和各项指标满足设计要求。更多还原

【Abstract】 With the development of PCI Express technology and its application in the backplane, the automatic test system of PXI Express gets promoted. PXI Express accesses to more test areas used to be controlled by expensive and dedicated high-speed instruments for its high performance, low-cost and compatibility. The paper designs a PXI Express remote controller based on PCI Express cable to control the PXI Express system with an ordinary desktop. While enjoying the high-performance of desktop , it also can cope with harsh test environment.This thesis raised requirement analysis on the PXI Express remote controller first, then developed the overall design.The remote controller is divided into two modules: the driver module in the PCI Express slot of your computer and the system module in the system slot of PXI Express chassis, the two achived remote control through the PCI Express cable. The design of PCI Express driver module described the adjustment technology of high-speed differential signals, through detailed analysis on high-speed signals.It completed the prossing of a x4 link of PCI Express differential signals also with the differential reference clocks for long-distance transmission, the module supported all of the auxiliary signals of PCI Express cables. The PXI Express system module introduced PCI Express switching technology, and used it to complete PCI Express link expansion, from a x4 link of the upstream to downstream of link 4x4 or link 8+16. This achieved transparent connection of the upstream PCI Express link with the backplane. At the same time, the system module analyzed the clock distribution and the other signal processing of the system module. The use of PCI Express interface conversion in FPGA helped to achieve the expansion of the PXI trigger bus controller, which supports to bus trigger and external trigger in two ways; also achived SMBus functionality of the system modules, using two-wire serial bus to read or write the serial EPROM for capacity record in the backplane to relize the backplane identification. As high-speed signal processing throughout the entire design, the design had rigorous planning, placement and routing constraints to ensure high-speed signal quality with the theory of signal integrity of high-speed signals. Finally, the test system of PXI Express is built for the functional and performance analysis of the PXI Express external controller suite. Experimental results show that the controller functionality and technical specifications meet the design requirements.更多还原