FlexRay Communication Controller (FLEXRAY)
MPC5510 Microcontroller Family Reference Manual, Rev. 1
Freescale Semiconductor
30-149
Preliminary
The following sequence must be executed by the application to put the protocol into the
POC:default config
state.
1. Repeatedly send Protocol Command FREEZE via
Protocol Operation Control Register (POCR)
until the freeze bit FRZ in
Protocol Status Register 1 (PSR1)
is set.
2. Repeatedly send Protocol Command DEFAULT_CONFIG via
, until the freeze bit FRZ bit in
Protocol Status Register 1 (PSR1)
is cleared and
the PROTSTATE field in
Protocol Status Register 0 (PSR0)
is set to
POC:default config
.
30.7.6
Message Buffer Search on Simple Message Buffer Configuration
This sections describes the message buffer search behavior for a simplified message buffer configuration.
The receive FIFO behavior is not considered in this section.
30.7.6.1
Simple Message Buffer Configuration
A simple message buffer configuration is a configuration that has at most one transmit message buffer and
at most one receive message buffer assigned to a slot
S
. The simple configuration used in this section
utilizes two message buffers, one single buffered transmit message buffer and one receive message buffer.
The transmit message buffer has the message buffer number
t
and has following configuration
The availability of data in the transmit buffer is indicated by the commit bit MBCCSRt[CMT] and the lock
bit MBCCSRt[LCKS].
The receive message buffer has the message buffer number
r
and has following configuration
Table 30-116. Transmit Buffer Configuration
Register
Field
Value
Description
MBCCSRt
MCM
-
used only for double buffers
MBT
0
single transmit buffer
MTD
1
transmit buffer
MBCCFRt
MTM
0
event transition mode
CHA
1
assigned to channel A
CHB
0
not assigned to channel B
CCFE
1
cycle counter filter enabled
CCFMSK
000011
cycle set = {4n} = {0,4,8,12,...}
CCFVAL
000000
MBFIDRt
FID
S
assigned to slot S
