Based On Lxi's High-speed Data Acquisition Instrument Controller Design And Realization

Science and technology can hardly develop without the changes of test means. ATS (Automatic Test System) is not only used in the field of aerospace and other defense technology, it also extensively penetrates into industrial production, consumer testing and other fields. The propose of LXI standard brings an enormous advantage to automatic test system .The topic comes from a project based on LXI high-speed data acquisition instrument. The paper first introduces the development of field bus instruments and LXI standards, then analysed the overall data collection instruments design. According to the overall design of LXI system controller hardware, this paper gives a detailed scheme, realizes the development environment of Vxworks, and completes the design requirements. The paper mainly includes the following aspects:The overall design scheme of High-speed data acquisition instrument. According to the design requirements, the paper analyses the integral design of the data acquisition instrument structure, detailsthe design of LXI system controller, and selects the important devices.We completed the design and implementation of LXI system controller hardware. The power supply, PROM, FLASH, DDR SDRAM circuit design of LXI system controller for the implementation scheme is introduced in detail,. This chapter discusses key parts - Gigabit network design, analysis of the OSI network architecture and design, and detailed information on specific circuit based on the selection of PHY chip .The critical software design of FPGA. The paper detailed the high-speed custom interface design, combined data acquisition boards with their own requirements, and used the Create or Import Peripheral tool to achieve the timing function step by step. At the same time we achieved the entire structure of the entire system controller, and configured the FPGA power-on work. Signal integrity issues. This paper analyses the factors affecting the signal integrity and proposes anti-interference measures for various factors.LXI system controller debug and verification. Firstly the paper introduces the PCB hardware debugging process, then introduces Vxworks operating system's construction of the development environment.