FlexRay Communication Controller (FlexRAY)
PXN20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor 26-29
PCMI_EF Protocol Command Ignored Error Flag — This flag is set if the application has issued a POC command by
writing to the POCCMD field in the Protocol Operation Control Register (POCR) while the BSY flag is equal to
1. In this case the command is ignored by the controller and is lost.
0 No such error.
1 POC command ignored.
FOVB_EF Receive FIFO Overrun Channel B Error Flag — This flag is set when an overrun of the FIFO for channel B
occurred. This error occurs if a semantically valid frame was received on channel B and matches the all criteria
to be appended to the FIFO for channel B but the FIFO is full. In this case, the received frame and its related slot
status information is lost.
0 No such error.
1 FIFO overrun on channel B has been detected.
FOVA_EF Receive FIFO Overrun Channel A Error Flag — This flag is set when an overrun of the FIFO for channel A
occurred. This error occurs if a semantically valid frame was received on channel A and matches the all criteria
to be appended to the FIFO for channel A but the FIFO is full. In this case, the received frame and its related slot
status information is lost.
0 No such error.
1 FIFO overrun on channel B has been detected.
MSB_EF Message Buffer Search Error Flag — This flag is set if the message buffer search engine is still running while
the next search cycle must be started due to the FlexRay protocol timing. In this case, not all message buffers
are considered while searching.
0 No such event.
1 Search engine active while search start appears.
MBU_EF Message Buffer Utilization Error Flag — This flag is asserted if the application writes to a message buffer
control field that is beyond the number of utilized message buffers programmed in the Message Buffer Segment
Size and Utilization Register (MBSSUTR).
If the application writes to a MBCCSRn register with n > LAST_MB_UTIL, the controller ignores the write attempt
and asserts the message buffer utilization error flag MBU_EF in the CHI Error Flag Register (CHIERFR).
0 No such event.
1 Non-utilized message buffer enabled.
LCK_EF Lock Error Flag — This flag is set if the application tries to lock a message buffer that is already locked by the
controller due to internal operations. In that case, the controller does not grant the lock to the application. The
application must issue the lock request again.
0 No such error.
1 Lock error detected.
DBL_EF Double Transmit Message Buffer Lock Error Flag — This flag is set if the application tries to lock the transmit
side of a double transmit message buffer. In this case, the controller does not grant the lock to the transmit side
of a double transmit message buffer.
0 No such event.
1 Double transmit buffer lock error occurred.
SBCF_EF System Bus Communication Failure Error Flag — This flag is set if a system bus access was not finished
within the required amount of time (see Section 26.6.19.2, System Bus Access Timeout).
0 No such event.
1 System bus access not finished in time.
FID_EF Frame ID Error Flag — This flag is set if the frame ID stored in the message buffer header area differs from the
frame ID stored in the message buffer control register.
0 No such error occurred.
1 Frame ID error occurred.
Table 26-21. CHIERFR Field Descriptions (continued)
Field Description
To Next Page
Loading...
