Development Of PXI Express Remote Controllor

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.