ST STM32F101 series Reference Manual

Controller area network (bxCAN) RM0008
671/1128 DocID13902 Rev 15
CAN receive FIFO 1 register (CAN_RF1R)
Address offset: 0x10
Reset value: 0x0000 0000
CAN interrupt enable register (CAN_IER)
Address offset: 0x14
Reset value: 0x0000 0000
Bits 1:0 FMP0[1:0]: FIFO 0 message pending
These bits indicate how many messages are pending in the receive FIFO.
FMP is increased each time the hardware stores a new message in to the FIFO. FMP is
decreased each time the software releases the output mailbox by setting the RFOM0 bit.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Reserved
1514131211109876 5 43210
Reserved
RFOM1 FOVR1 FULL1
Res.
FMP1[1:0]
rs rc_w1 rc_w1 r r
Bits 31:6 Reserved, must be kept at reset value.
Bit 5 RFOM1
: Release FIFO 1 output mailbox
Set by software to release the output mailbox of the FIFO. The output mailbox can only be
released when at least one message is pending in the FIFO. Setting this bit when the FIFO
is empty has no effect. If at least two messages are pending in the FIFO, the software has to
release the output mailbox to access the next message.
Cleared by hardware when the output mailbox has been released.
Bit 4 FOVR1
: FIFO 1 overrun
This bit is set by hardware when a new message has been received and passed the filter
while the FIFO was full.
This bit is cleared by software.
Bit 3 FULL1
: FIFO 1 full
Set by hardware when three messages are stored in the FIFO.
This bit is cleared by software.
Bit 2 Reserved, must be kept at reset value.
Bits 1:0 FMP1[1:0]
: FIFO 1 message pending
These bits indicate how many messages are pending in the receive FIFO1.
FMP1 is increased each time the hardware stores a new message in to the FIFO1. FMP is
decreased each time the software releases the output mailbox by setting the RFOM1 bit.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
Reserved
SLKIE WKUIE
rw rw
151413121110987654321 0
ERRIE
Reserved
LEC
IE
BOF
IE
EPV
IE
EWG
IE
Res.
FOV
IE1
FF
IE1
FMP
IE1
FOV
IE0
FF
IE0
FMP
IE0
TME
IE
rw rw rw rw rw rw rw rw rw rw rw rw

ST STM32F101 series Specifications

General

Brand	ST
Model	STM32F101 series
Category	Computer Hardware
Language	English