Atmel SpW-10X Manuel D’Utilisation

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

67

 

Config Port 

Address  

The configuration port address field routes the packet to the configuration 

port of the router. The configuration port address is always present when 

configuring the SpaceWire Router. 

1 

Destination 

Logical 

Address  

The destination logical address is not used in the SpaceWire Router. The 

SpaceWire router accepts packets which have the default destination logical 

address of 254h (FEh). 

1 

Protocol 

Identifier  

The RMAP protocol identifier is 01h. 

1 

Command 

Byte  

The command byte indicates a read-modify-write command. The Source path 

address length fields are set to the number of source path addresses 

required as defined in section 7.6.9. 

1 

Destination 

Key  

The destination key identifier must match the contents of the destination key 

register, see section 9.5.10. 

1 

Source 

Path 

Address  

The source path address field is used to add source path addresses to the 

head of the reply packet. The expected number of source path addresses is 

specified in the command byte. See section 7.6.9 for source path address 

decoding. 

0,4,8,16

Source 

Logical 

Address  

The source logical address should be set to the logical address of the node 

which sent the command. 

1 

Transaction 

Identifier  

The transaction identifier identifies the command packet and reply packet 

with a unique number. 

2 

Extended 

RMW 

Address 

The extended read address is not used in the SpaceWire router and shall 

always be set to zero. 

1 

RMW 

Address 

The read-modify-write address identifies the SpaceWire router register 

address to modify. Valid RMW addresses are defined in section 9. 

4 

Data + 

The data length of the read-modify-write command is 8, 4 bytes for data and 

3