大靶面拼接探测器的终端数据接收系统设计

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关键词：图像采集；光纤通信；设备驱动；PCIe；SG-DMA

中图分类号：TP394.1;TN929.11 文献标识码：A

doi：10.37188/OPE.20253321.3392 CSTR：32169.14.OPE.20253321.3392

Abstract：With advances in large-area plane-splicing detector technology，it is essential that data processing terminals reliably receive large-scale，high-resolution image data at high speed and without errors. A terminal data-receiving system was developed，comprising a hardware device with two optical-fiber interfaces，eight serial ports，and a PCI Express （PCIe） interface，together with a domestically developed device driver. An FPGA serves as the system's central processng unit. This paper details the hardware architecture and several key technologies of the terminal data-receiving system，including optical-fiber data reception，data verificationand bufering schemes，serial-port transmission control via the device driver， optimization of high-throughput data transfer between the hardware and host using scater-gather DMA （SG-DMA），and the design of the domestic device driver.Experimental results indicate a sustained datareceiving rate of 2.26GB/s ，error-free continuous long-term operation，and a minimum driver response timeof 111μs .The terminal data-receiving system demonstrates excellent stability，throughput，and latency characteristics，evidencing strong performance and broad application potential.

Key words： image acquisition; optical fiber communication; device driver;PCIe; SG-DMA

1引言

随着地基大型望远镜[1-3]等光电探测系统向着探测能力强、观测视场范围大的方向发展，应用大靶面拼接探测器技术逐渐成为成像电路设计的趋势[4-5]。（剩余13081字）