Design Of PCI-e And Fiber Boardcard Basedon FPGA

With the rapid development of digital communication technology, high-speed serial transmission has been widely used. In the military field, the emergence of the new system radar systems generates much larger amounts of data, and it also requires the real time of data transmission and processing. Under the engineering background of certain radar system, a PCIe interface board based on FPGA need to be designed, which is used for transmitting radar echo data via fiber optic cable to the computer.In this paper, the design of PCIe fiber-optic interface card relates to some high-speed transmission technology and advanced devices, such as PCI Express protocol, aurora protocol and DDR2 SDRAM. It adopts X8 channels design of PCI Express Specification 1.0 version, and each channel bandwidth is up to 2.5GHz.For the aurora-based optical fiber transmission protocol, the design uses a fiber binding X2 channels and can transfer fiber optic data in duplex mode. Besides, DDR2 SDRAM is employed as a cache unit for the integrity of high-speed data transmission.FPGA design is based on high-performance series Virtex-5. According to "top-down" thinking, the overall design scheme of the interface card system is proposed. The Virtex-5 provides PCI Express endpoint and Aurora 8B / 10 B and other IP cores, and sub-modules are designed, such as DMAControl Module, DDR2 Logic Module and Aurora User Interface Module. After the completion of logic design, design simulation is worked in Model Sim SE 10.0C software. Besides, application program has to be developed in C # language, using multi-task processing threads to achieve the parallel processing of data transmission, reception and processing. Finally, a system platform is built to debug jointly, and the storage rate is about 370 MB/s.The result indicates that the interface board achieve the desired performance of high-speed fiber optic data transmission.