X射线探测器的多FPGA远程配置

摘要

针对光锥阵列X射线探测器中配置多个FPGA时存在的操作复杂、效率低、现场辐射等问题,提出由单ARM对多FPGA进行远程并行配置的解决方案.通过共用配置时钟线和数据线、从串配置模式、ARM同组GPIO口控制同组信号线等方式,保证在硬件上使用较少信号线的前提下实现多FP-GA并行配置.在软件设计中将配置数据嵌入程序代码,使配置过程作为系统初始化的一部分完成,从而简化了配置流程、提高了配置效率.实验表明,设计实现了多FPGA的远程并行配置,系统结构简单,与远程主机只需要连接网线和串口线即可,配置时间约为1.6 s.该系统方案可为更大规模阵列FP-GA的配置应用提供参考.%To resolve the problems evolved with multi-FPGAs'configuration in fiber-optic-taper array x-ray detector,such as complex operations,poor efficiency and high radiation application,a scheme of multi-FPGAs'remote and parallel configuration by a single ARM was proposed in this paper.Multi-FPGAs'parallel configuration used less signal wires was realized by means of sha-ring clock and data wires,using slave-serial configuration mode,controlling signal wires of the same group with the same GPIO group of the ARM,and so on.Configuration data were implanted in the program codes so that the configuration process was a part of the initialization of the system.Thus configuration process was simplified and the efficiency was improved.Experimental result showed that multi-FPGAs'remote and parallel configuration can be implemented successfully,and the structure of the configura-tion system was simplified.It needed only a single twisted-pair and a serial line to connect this system to the remote monitor.The configuration time just lasted about 1.6 s.The system can be a reference for larger scale FPGA array's configuration.