GRESB SpaceWire/Ethernet Bridge

The GRESB is a SpaceWire/Ethernet Bridge with routing capabilities. It facilitates rapid development and testing of equipment with SpaceWire interfaces and it is suitable for all design  stages, from initial evaluation to unit testing and integration support.

How it works:

The GRESB provides three bi-directional SpaceWire links and six “virtual” links that are interfaced through TCP sockets. When a packet arrives at the GRESB bridge on any of the links (real or virtual) it is forwarded to the link specified in the routing table. This allows a developer to generate SpaceWire test data from his computer and send the data with TCP/IP to the GRESB, which then routes the traffic out on the appropriate link. Similarly, data received on each of the three SpaceWire links will be routed to the TCP workstation or to other SpaceWire nodes. SpaceWire equipment developed at different sites can easily communicate with each other over any IP network (like the Internet) using two GRESB bridges. A tunnel server and client are provided together with the GRESB so that the users can rapidly start their development. Moreover, multiple bridges can be attached to the same network to access any number of SpaceWire interfaces.The aggregate throughput of the bridge is 25 Mbit/s when connected to a 100 Mbit/s full-duplex Ethernet network.

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More Features:
A 20xGPIO pin header allows for custom connections to the system under test. The GPIOs can be controlled through the Ethernet interface.The GRESB includes also a CAN-2.0 interface, allowing transmission and reception of data over the CAN-2.0 busThe GRESB can also be used together with the GRMON debugger, providing a transparent connection to GRLIB/LEON/NOEL-V systems using the SpaceWire RMAP protocol.