CAN Transmit Loopback Mode

MZimm.3 · ‎2023-01-31

Hello all,

I would like to put the CAN2 interface into operation on a NUCLEO STM32F466RE board. For this purpose I have programmed an example in which a BYTE array HELLO is to be sent in the loopback.

If I now pass the TxHeader Struct to the HAL_CAN_AddTxMessage() method, this method is executed without error. The signal recording on the TX pin also shows a data transmission. It's just not the data I expected.

My data from the TxHeader cannot be entered in the mailbox register. It looks like the registers are locked, although all mailboxes report that they are free.

What else can I do wrong at this point?

What else could be the reason that the mailbox cannot be written to?

Greetings

Michael

SofLit · ‎2023-02-02

Hello,

Thank you for the feedback. Indeed SRAM2 is a slave and it was the reason why it was not working.

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Thanks

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