100BASE-T1 SPY 12 Port
User Manual
44
4.5
Structure of the FlexRay payload
The following table shows the structure of a FlexRay payload encapsulated in a
100BASE-T1_SPY_12_Port RAW frame:
Field Name
N
º
of Bytes
Value
Cycle
2
Time cycle in which the frame was received
Message word length
2
Length of the whole FlexRay frame payload
Frame ID
2
Received Frame IDs
Direction
1
Frame Direction
Frame word length
1
Length of the FlexRay frame payload for a
specific ID
Payload
X
Depends of LENGTH field
Table 4-9: Structure of 100BASE-T1_SPY_12_Port RAW Frame with FR Payload
Note:
A single Payload encapsulated in a 100BASET1_SPY RAW Ethernet Frame can
have several IDs (See example below). For every single ID,
LENGTH
gives the length of
the payload for that specific ID.
Note:
DIRECTION
specifies if the frame is received (DIRECTION
‘0’) or transmitted
(DIRECTION ‘1’) for a specific ID. In the case of FlexRay, this field will be 0. The device
is not able to transmit FlexRay frames.
