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针对我国现阶段星载计算机通用性较差和无法“即插即用”的问题,以及对数据传输速率的高要求,设计了新型即插即用星载计算机千兆以太网数据传输系统,重点研究了星载计算机的总体结构设计和千兆以太网的实现。该系统以国产BM3803为处理器,采用紧凑型外围组件互联c PCI总线为内总线与系统各功能模块互连,实现即插即用和通用化功能。千兆以太网平台采用MAC+PHY方式,MAC采用FPGA内嵌的IP核实现,PHY采用Marvell公司的88E1111芯片实现。对比国产星载计算机在以太网方面的现状,分析表明,该系统通用性更好,数据处理性能更高,数据传输速率最高可达1 Gb/s。以FPGA方式实现千兆以太网设计,有效提高了系统的可靠性和集成度,能够满足未来较长时间国内星载计算机系统在千兆以太网方面的实际应用需求。
In view of the problem of the commonality of on-board computers in our country and the problem of “plug and play” and the high requirement of data transmission rate, a new plug-and-play onboard computer Gigabit Ethernet data transmission system , Focusing on the overall structure of the on-board computer design and Gigabit Ethernet implementation. The system uses a domestic BM3803 as a processor and uses a compact peripheral component interconnect c PCI bus to interconnect the internal bus with the system functional modules to achieve plug-and-play and general-purpose functions. The Gigabit Ethernet platform adopts the MAC + PHY mode, the MAC adopts the IP core embedded in the FPGA, and the PHY is implemented by the Marvell’s 88E1111 chip. Comparing the status quo of the domestic on-board computer in Ethernet, the analysis shows that the system has better universality, higher data processing performance and data transmission rate up to 1 Gb / s. FPGA-based Gigabit Ethernet design, effectively improve the system reliability and integration, to meet the long-term domestic spaceborne computer systems in Gigabit Ethernet practical application needs.