How to set FDCAN baud rate 8 MBit/s in CubeMX?

[MKash.1]

..

[MKash.1]

So, why last working BR=2500KB/s?

[LCE]

What do you exactly mean?

You have set nominal bitrate to 2.5M and it is "working"?

Working with what on the other side? Or just some output on the scope?

[MKash.1]

Yes, I have 2 boards (MASTER-SLAVE) and they work perfectly on BR=2.5M

[LCE]

Have you enabled transceiver delay compensation?

[Tesla DeLorean]

*THIS*

We covered this a few months ago, don't recall if it was for the U5, probably H7, but definitely found and provided 8 Mbit FDCAN initialization example.

Sort of s**t the code generator or boiler plate code should have mastery of...

[LCE]

TDC was definitely a problem I had on a H7 at 8Mbit, and I had a long thread about it.

I'm actually using direct register settings, and I even enabled TDC. But what I oversaw was that I also had to set a delay value in TDCR...

@MK.1ashin​  HAL_FDCAN_ConfigTxDelayCompensation() handles all of that.