What is the proper and complete way to implement FDCAN to transmit a message and observe on PCAN view?

[YEren.1]

Hello, I am using STM32H750xBHx. I have the following code snippets where I try to transmit some CAN message and then observe this on PCAN view. However, there is no received message in PCAN view. It sometimes shows BUSHEAVY status under the trace section. Moreover, I measure with an oscilloscope and there seems no activity. Before trying these, I did the external loopback mode work (I was able to see data was transmitted), but still, I didn't see anything both on the oscilloscope and PCAN.

 

 

the fdcan1 init is:

I also changed the timing parameters in init according to the bit timing calculator but does not work. It stays in HAL_FDCAN_IsTxBufferMessagePending forever.

In the end, what I need is to transmit a message and be able to observe it on oscilloscope and PCAN. What am I missing? Is there other configurations that I didn't consider?

[Karl Yamashita]

Do you have terminating resistors on the CAN bus?

[YEren.1]

Yes, I have.

[Karl Yamashita]

Draw out how everything is connected, power supply, terminating resistors and all. The last person that I helped had drew out his setup for me to see. He had in fact wired it incorrectly. So let's see your setup to eliminate any possible wiring issues and get that out of the way first.