Control, Status And Configuration Registers; Tx Mailboxes; Acceptance Filters - ST STM32F423 Reference Manual

RM0430
32.3.2

Control, status and configuration registers

The application uses these registers to:
•
Configure CAN parameters, e.g. baud rate
•
Request transmissions
•
Handle receptions
•
Manage interrupts
•
Get diagnostic information
32.3.3

Tx mailboxes

Three transmit mailboxes are provided to the software for setting up messages. The
transmission Scheduler decides which mailbox has to be transmitted first.
32.3.4

Acceptance filters

The bxCAN provides up to 28 scalable/configurable identifier filter banks in dual CAN
configuration or up to 14 scalable/configurable identifier filter banks in single CAN
configuration, for selecting the incoming messages, that the software needs and discarding
the others.
Receive FIFO
Two receive FIFOs are used by hardware to store the incoming messages. Three complete
messages can be stored in each FIFO. The FIFOs are managed completely by hardware.
RM0430 Rev 8
Controller area network (bxCAN)
1087/1324
1130