Stm32G431KBU6 CANFD can't work when BRS On？

[eason_Yi]

Hi community：

     I'm using CANFD on stm32g431kbu6 board, but I find some issue that CANFD cant work normally with BRS ON，my config of CANFD show in the comments。Does anyone know about this？

Thanks

[SofLit · Accepted solution]

You need to increase TSEG1 and TSEG2 as much as possible an decrease the prescaler either for Nominal or data phases.

TSEG1 ~= 80% (TSEG1+TSEG2) for sampling point at 80%

[eason_Yi]

Because my slave CANFD device is working in sampling point at 75% of data phase, data baud is 5MHz， so I want to set at 75%, it seems work good now, I'll conduct  pressure testing for a period of time.If this kind issues happen again, I'll try your advice.

Thanks

[SofLit]

75% or 80% doesn't make much difference.