clock configuration issues when I use CAN

[Jad]

good morning. I want to implement a can loopback on my STM32H755, but when I enable FCAN1, then my clock can't resolve it issues and shows this for FDCAN in the picture below. how could I resolve this problem?

 

[mƎALLEm]

Hello,

You need to check the reference manual and check your system frequency as well as what voltage scale (VOS) configuration you set:

Could you please share your ioc file?

 

 

[Jad]

than you very much for the quick response

those are the values I found. I do not know how to understand the values and adjustate the timer.

[mƎALLEm]

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@Jad wrote:

than you very much for the quick response

those are the values I found. I do not know how to understand the values and adjustate the timer.

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No these are the values for the power consumption.

You need to set the voltage scale according to the system frequency, from DS12919 Rev 2:

Based on that voltage scale (VOS) level, you can know what is the maximum allowed kernel clock frequency you can set for FDCAN: