Introduction

TEMU provides support for SpaceWire based devices. It also provides helpful functions for RMAP commands decoding. The bus model interfaces are available in: temu-c/Bus/Spacewire.h. In addition to the interfaces a simple SpaceWire Router model is provided.

Spacewire is a point to point bus. Two devices can be connected directly while multiple devices can be connected through a Router. A SpaceWire Route receives a packet on a port and forward it to another, where the destination device is connected.

Spacewire uses wormhole routing. The sender device provides the list of addresses (each address is an 8-bit value) required to reach the destination. Each node in the middle is supposed to strip the first address and use it to select the port used to forward the packet.