基于国产化FPGA的时统系统设计

Design of Time Unity System Based on Localized FPGA

文中设计了基于国产化FPGA芯片PG2L100H的多输入源、多频可选输出的时统系统,实现了包括GPS、北斗、IRIG-B码的多输入源实时切换,并对在进行时间信息的解编码后授时给设备其他系统进行同步,同时在软件设计中加入加三移位运算方法来优化LUTs的使用率。该设计在实验室环境下进行测试,具有成本低、同步精度高、稳定性强等优点,对于光电测控设备现有技术更新具有实用价值。

A multi-input source and multi-frequency optional output timing system based on the domestic FPGA chip PG2L100H was designed,which realized the real-time switching of multi-input sources including GPS,Beidou and IRIG-B codes,and decoded the time information in progress.The post-grant time was used to synchronize other systems of the equipment,and a three-shift operation method was added to the software design to optimize the utilization rate of LUTs.The design was tested in laboratory environment,and had the advantages of low cost,high synchronization accuracy,and strong stability,and has practical value for updating the existing technology of photoelectric measurement and control equipment.