Atmel SpaceWire Router SpW-10X Manual De Usuario

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

52

 

This section describes how the routing control logic interprets packets. 

7.1 PACKET ADDRESSES 

The routing control logic interprets the first byte of each received packet as the packet address.  The 
packet address defines the physical ports through which the routing control logic will use to route the 
packet towards its destination.   

Packets which have a path address (0-31) as the first byte are always routed to the corresponding 
physical port number on the router.  Packets which have a logical address (32-255) are routed to 
physical ports dependent on the contents of the routing table.  The internal SpaceWire router routing 
table can be set up to assign logical addresses to the physical ports, except the configuration port 
(port 0) which can only be accessed by path addressing 

The physical port addresses for the SpaceWire router and the expected packet type is defined in the 
table below.  The packet types can be viewed in section 0. 

0 

Command packet 

Configuration port 

1 

Any type 

SpaceWire link port 1 

2 

Any type 

SpaceWire link port 2 

3 

Any type 

SpaceWire link port 3 

4 

Any type 

SpaceWire link port 4 

5 

Any type 

SpaceWire link port 5 

6 

Any type 

SpaceWire link port 6 

7 

Any type 

SpaceWire link port 7 

8 

Any type 

SpaceWire link port 8 

9 

Any type 

External FIFO port 1 

10 

Any type 

External FIFO port 2 

11-31 N/A 

Invalid 

addresses 

32-255 

Any type 

Logical addresses 

 

Note that logical address 255 is reserved in the SpaceWire standard [AD1].