Trasmitting large data when hot plug continuously for CANFD interface on LPC550x

[jimmyli]

Hi,

    Below is a question that hope you can check and help to fix.

    Thanks very much.

    MCU: LPC550x

    Question: The CAN FD interface of LPC550x is in normal running mode, then we take a hot plug continuously for CAN FD, and LPC550x will trasmitting large data that causes the CAN PHY is hot.

    Does it has some ways to fix it ?

[Alice_Yang]

Hello @jimmyli 

Do you have LPCxpresso55s06-evk board? Does this issue can reproduce on this board?

BR

Alice

[jimmyli]

Hi Alice,

     Sorry that I have not an evk in hand to reappear, the question is raised by wu who gave a feedback before.

     Thanks.

[Alice_Yang]

Hello @jimmyli 

Which CAN PHY do you used?

How about use a simple SDK demo to test?

BR

Alice

[jimmyli]

Hi Alice,
As Johnson said, the sdk example is <...\driver_examples\mcan\interrupt_transfer>, CAN is configured as mcanConfig.enableCanfdSwitch = true;
Hope you can check and give some tips to us.
Thanks very much.

[Johnson_Ho]

The CAN PHY is SIT1050，Its data sheet states that it is compatible with TJA1050 chips. The CAN driver is ported from SDK V2.

[Alice_Yang]

Hello @Johnson_Ho 

Recommend you check what the data signal is. and because the CAN PHY is hot, so how about check SIT1050.

BR

Alice