ST STM32L4+ Series Reference Manual page 2057

RM0432
Offset to transmit mailbox base address
Receive mailbox
When a message has been received, it is available to the software in the FIFO output
mailbox. Once the software has handled the message (e.g. read it) the software must
release the FIFO output mailbox by means of the RFOM bit in the CAN_RFR register to
make the next incoming message available. The filter match index is stored in the MFMI
field of the CAN_RDTxR register. The 16-bit time stamp value is stored in the TIME[15:0]
field of CAN_RDTxR.
Offset to receive mailbox base
When 128*11 recessive bits occur:
Table 408. Transmit mailbox mapping
0
4
8
12
Table 409. Receive mailbox mapping
address (bytes)
0
4
8
12
Figure 612. CAN error state diagram
ERROR ACTIVE
When TEC or REC > 127
When TEC and REC < 128
BUS OFF
RM0432 Rev 6
Controller area network (bxCAN)
Register name
CAN_TIxR
CAN_TDTxR
CAN_TDLxR
CAN_TDHxR
Register name
CAN_RIxR
CAN_RDTxR
CAN_RDLxR
CAN_RDHxR
ERROR PASSIVE
When TEC > 255
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