CAN question with STM32F103C8T6.

JAlca · ‎2023-11-11

Hi all!,
I have 2 STM32F103C8T6 connected by CAN bus.
Each STM32F103C8T6 has the same firmware.
This firmware starts sending a message "RequestID" by the CAN bus.

Is there a way to avoid send the "RequestID" in case another "RequestID" were detected on the CAN bus?

I though about arbitration lost, but if I put a logic analizer, I can see each device is sending its own "RequestID" with about 20us delay.

What I need is a way a device detect a "RequestID" message was sent, and then wait a time to send own "RequestID"

I tried to abort any pending transmission in case a "RequestID" was received, but doesn't work:

Any ideas on how can I do this??

Thanks in advance!!

SofLit · ‎2023-12-27

Hello,

This statement is not clear: "Is there a way to avoid send the "RequestID" in case another "RequestID" were detected on the CAN bus?"

Could you please clarify what do you want to do?

Also I didn't understand the wording "RequestID"! Do you mean the ID of the CAN frame?

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