I can't receive the required ack bit from N2 node. So CAN message can't be transmit from N1 node.

[SUrte.1]

As you can see due to i can't receive the required ack from N2 node, N1 node It keeps sending the same message. Then HAL_ADDTX function returns HAL_CAN_ERROR_PARAM because the transmission is not happening and all mailboxes are full. Also i request TERR0 because of Transmission error of mailbox0.

Thank you in advance for your help.

[Tesla DeLorean]

Nobody has any idea what STM32 you're using or how anything is wired.​

Guessing STM32F429-DISC board of some revision. Aren't the CAN pins conflicted?

Diagram the circuit, identify the pins, show the code.

[SUrte.1]

I'm using STM32F429

Codes are in there:

https://github.com/niekiran/MasteringMCU2/tree/master/Source_codes/OpenStm32SWB/MasteringMCU2/CAN_Normal_Mode_2Nodes

[SUrte.1]

And i'm reading this on logic analyzer CH1. Tx message cant transmitted so keep repeating.

[SUrte.1]

I didn't use 120 ohms because my transciever module has it.