Stm32g474re-nucleo FDCAN internal loop not working

enee · ‎2026-03-13

Hi, I have all configured using internal loop FDCAN1 and there is not working on my STM32G474RE-Nucleo board

TDK · ‎2026-03-13

What does "not working" mean here?

How to write your question to maximize your chance... - STMicroelectronics Community

If you feel a post has answered your question, please click "Accept as Solution".

mƎALLEm · ‎2026-03-13

Hello,

"Not working" does mean nothing. What problem you are facing? in transmit? in receive?

Try to use external loopback mode and monitor FDCAN_Tx pin.

I am not comfortable with setting 1Tq to the time segments. Here you are setting 1Tq for TSEG2:

Try to set NTSEG1 = 17TQ and NTSEG2=2TQ

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.

Karl Yamashita · ‎2026-03-13

Upload your IOC file. Also show some code. We don't know if you configured the filters correctly and if you even started the CAN controller with interrupts.

If a reply has proven helpful, click on Accept as Solution so that it'll show at top of the post.
CAN Jammer an open source CAN bus hacking tool
CANableV3 Open Source