Design And Implemen Tation Of High-Speed Data Transfer System Base On PCI Express And DDR2 SDRAM

Along with the development of Phased-Array Radar, Ultra-Wideband Radar, Digital Array Radar, the radar echo data has been increased. How to transfer a large amount of data into computer becomes the key problem that restricts Radar performance improvement. In this paper, high-speed transmission of data into computer is realized by using fiber optic interface to receive data or using AD to acquire IF signal, then using DDR2 to cache data and transferring the data into computer through PCI Express bus.The general plan of system is designed in this paper on the basis of analyzing task and technical indexes. The theorem and methods of data transfer system are researched ,hard circuits of PCI Express data transfer system are devised based on FPGA. User logic parts of PCI Express devices are constructed base IP core of Xilinx.VHDL is used to design and realize data acquisition, optic data reception, DDR2 memory interface control , Programmed Input Output of PCI Express, interruption and DMA. ModelSim is used to analyze interface timming.To meet the need of software of data transfer system, the theorem and methods of WDM(device drive module) and MFC are researched. WDM program and user program are developed base on DriverStudio+Visual Studio 2005. Application calls Win32 API functions, followed by the creation of I / O request packet by system, the device driver accesses hardware by implementing the request.Thesis focused on analyzing the relevance opteration of PCI Express and DDR2 SDRAM.In the test enviroment, the system can be stable, reliable work and realize 160～200MB/s data transmission. This solve speed tight bottles that restricts Radar performance improvement.