ST STM32F102 series User Manual

Controller area network (bxCAN) RM0008
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CAN error status register (CAN_ESR)
Address offset: 0x18
Reset value: 0x00
Bit 7 Reserved, forced by hardware to 0.
Bit 6 FOVIE1: FIFO Overrun Interrupt Enable
0: No interrupt when FOVR is set.
1: Interrupt generation when FOVR is set.
Bit 5 FFIE1: FIFO Full Interrupt Enable
0: No interrupt when FULL bit is set.
1: Interrupt generated when FULL bit is set.
Bit 4 FMPIE1: FIFO Message Pending Interrupt Enable
0: No interrupt generated when state of FMP[1:0] bits are not 00b.
1: Interrupt generated when state of FMP[1:0] bits are not 00b.
Bit 3 FOVIE0: FIFO Overrun Interrupt Enable
0: No interrupt when FOVR bit is set.
1: Interrupt generated when FOVR bit is set.
Bit 2 FFIE0: FIFO Full Interrupt Enable
0: No interrupt when FULL bit is set.
1: Interrupt generated when FULL bit is set.
Bit 1 FMPIE0: FIFO Message Pending Interrupt Enable
0: No interrupt generated when state of FMP[1:0] bits are not 00b.
1: Interrupt generated when state of FMP[1:0] bits are not 00b.
Bit 0 TMEIE: Transmit Mailbox Empty Interrupt Enable
0: No interrupt when RQCPx bit is set.
1: Interrupt generated when RQCPx bit is set.
Note: refer to Section 21.5: bxCAN interrupts.
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
REC[7:0] TEC[7:0]
rrrrrrrrrrrrrrrr
1514131211109876543210
Reserved LEC[2:0] Res. BOFF EPVF EWGF
Res. rw rw rw r r r
Bits 31:24 REC[7:0]: Receive Error Counter
The implementing part of the fault confinement mechanism of the CAN protocol. In case of an error
during reception, this counter is incremented by 1 or by 8 depending on the error condition as
defined by the CAN standard. After every successful reception the counter is decremented by 1 or
reset to 120 if its value was higher than 128. When the counter value exceeds 127, the CAN
controller enters the error passive state.
Bits 23:16 TEC[7:0]: least significant byte of the 9-bit Transmit Error Counter
The implementing part of the fault confinement mechanism of the CAN protocol.
Bits 15:7 Reserved, forced by hardware to 0.

ST STM32F102 series Specifications

General

Brand	ST
Model	STM32F102 series
Category	Microcontrollers
Language	English