航天器通用SpaceWire总线路由单元的研究与实现

Research and implementation of universal SpaceWire Router for Spacecraft

摘要:

为满足日益增长的航天器各系统间高速数据多路传输的需求,对SpaceWire高速数据总线特点进行了研究,提出了一种航天器通用SpaceWire总线路由单元的设计方法,采取了标准化SpaceWire总线接口,支持多个SpaceWire接口的自适应路由功能,可实现组网设备的即插即用。同时采用中央控制器进行高级协议算法处理,支持网络分布式中断管理功能,实现网络节点的事件触发式交互控制功能,总线数据包能够按照配置参数能够在任意SpaceWire端口间的一对一路由传输、一对多组播传输。经试验测试路由单元可以支持路由端口数最多达18个,每路接口工作速率最大可达到200Mbps,其提供的通用功能能够满足大部分航天器SpaceWire网络的需求。

Abstract:

To meet the growing demand of high-speed data transmission between different systems in the spacecraft, the characteristics of SpaceWire bus are studied. A design method of universal SpaceWire bus router for spacecraft is proposed. A standardized SpaceWire bus interface is adopted to support the adaptive routing of multiple SpaceWire interface, realized the “plug and play”. The central controller is used to deal with the advanced protocol algorithm, to support the distributed interrupt management of network. The bus packet can finish the routing by one to one or one to many multicast transmission according to the configuration parameters. The experimental result shows that the router can support up to 18 ports, and each interface can reach 200Mbps. It can meet the needs of most spacecraft SpaceWire networks.