Table 143. Transmit Mailbox Mapping; Table 144. Receive Mailbox Mapping; Figure 202. Can Error State Diagram - ST STM32F102 Series Reference Manual

RM0008

Table 143. Transmit mailbox mapping

Offset to transmit mailbox base
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 CRFR 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.

Table 144. Receive mailbox mapping

Offset to receive mailbox base

Figure 202. CAN error state diagram

address
0
4
8
12
address (bytes)
0
4
8
12
ERROR ACTIVE
When 128 * 11 recessive bits occur:
Controller area network (bxCAN)
Register name
CAN_TIxR
CAN_TDTxR
CAN_TDLxR
CAN_TDHxR
Register name
CAN_RIxR
CAN_RDTxR
CAN_RDLxR
CAN_RDHxR
When TEC or REC > 127
ERROR PASSIVE
When TEC and REC < 128,
When TEC > 255
BUS OFF
513/690