TC1784
FlexRay™ Protocol Controller (E-Ray)
User´s Manual
20-231
V1.1, 2011-05
E-Ray, V3.13
to the Message RAM is started. In addition the Message Buffer numbers stored under
IBRH and IBRS and the Command Mask flags are also swapped.
Data Transfer from Message RAM to Output Buffer
To read a Message Buffer from the Message RAM, the Host has to write to Command
Request register
to trigger the data transfer as configured in Output Buffer
Command Mask
register. After the transfer has completed, the Host can read the
transferred data from
, and
Table 20-16 Assignment of Input Buffer Command Mask Bit
Pos. Access Bit
Function
18
rh
Set Transmission Request Shadow
17
rh
Load Data Section Shadow
16
rh
Load Header Section Shadow
2
rw
Set Transmission Request Host
1
rw
Load Data Section Host
0
rw
Load Header Section Host
Table 20-17 Assignment of Input Buffer Command Request Bit
Pos.
Access Bit
Function
31
rh
IBSYS
IBF Busy Shadow,
signals ongoing transfer from IBF Shadow to Message RAM
21
−
16
rh
IBRS
IBF Request Shadow,
number of Message Buffer currently / last updated
15
rh
IBSYH
IBF Busy Host,
transfer request pending for Message Buffer referenced by
IBRH
5-0
rwh
IBRH
IBF Request Host,
number of Message Buffer to be updated next
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