The GRSPWROUTER IP core is a VHDL model of a SpaceWire routing switch as defined in the ECSS-E-ST-50-12C standard. The core is highly configurable, flexible and portable to a wide variety of FPGA and ASIC technologies.
The SpaceWire router IP core supports all mandatory and optional features in the ECSS-E-ST-50-12C. It supports from 2 to 31 ports in addition to the mandatory configuration port. Each port (except the configuration port) can be individually configured to be SpaceWire links, FIFO interfaces or AMBA interfaces. The AMBA ports are limited to a maximum of 16 in a single router. The configuration port provides an RMAP target (ECSS-E-ST-50-52C), and an optional AMBA AHB slave interface, both used for accessing internal configuration and status registers. The SpaceWire Plug-and-Play (PnP) protocol can optionally be supported on the configuration port.
Among the features supported by the router are: group adaptive routing, packet distribution, system time-distribution, distributed interrupts, port timers to recover from deadlock situations, and SpaceWire-D [SPWD] packet truncation based time-slot violations.
Additionally, the SpaceWire router can be integrated with the SpaceFibre controller. SpaceFibre ports can be connected to the internal FIFO ports of the SpaceWire router to bridge between SpaceWire and SpaceFibre traffic. SpaceWire data from/to multiple payloads can be aggregated in a single SpaceFibre High Speed Serial Link, all without software intervention.
