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

[MKash.1]

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[Diane POMABIA]

Hello @MK.1ashin​ 

what type of STM32 are you using ?

Regards

Diane

[MKash.1]

stm32U575

[MKash.1]

I was lucky with BR<2,5MBit/s, not more

[Diane POMABIA]

@mk_it.1ashin​ 

Please find this configuration that give you FDCAN with baudrate at 8MBits/s.

Regards

Diane

[MKash.1]

[MKash.1]

instead two 64 bytes packets

[MKash.1]

[Diane POMABIA]

Can you give us more explanation about your need? and your screenchots ?

Regards

DianeP

[LCE]

I think Cube forgets to enable transceiver delay compensation, which is vital at that bitrate.

Anyway, "nominal" bit rate is for arbitration phase, which must not be faster than 1 Mbit/s, I think.

[LCE]

So you have to enable FD mode with BitRate Switching.

Then set "nominal" timing to max 1 Mbit/s, then "data" timing to 8 M.

Have you checked the U575 spec if its FDCAN can run with 160 MHz clock?

I just know the H7's, which has a limit of 100 MHz.

[Diane POMABIA]

Hello @Community member​ 

On STM32U5, FDCAN can run with 160MHz clock.

Regards

DianeP

[MKash.1]