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Hello,
Could you answer ASAP to the questions below?
Target Device: 16FX CY96F637RBPMC-GS-UJE1
Q1. Is there any way to know that a lost arbitration of CAN Tx has been happen, both when CTRLRn.DAR == 0?
Q2. How about lost arbitration detection when CTRLRn.DAR == 1?
After some nodes start Tx at same time, a node, which outputs recessive state (1) simultaneously when another node outputs dominant state (0) for arbitration field, loses the arbitration.
I know that Bit 1 Error in STATRn.LEC excludes an error for arbitration field.
I also conceive of a way with STATRn.RXOK bit which indicates successful message reception, because it is difficult to zero-clear the RXOK between the beginning of a Tx and when the RXOK is set by receiving a message from another node which wins an arbitration on the Tx.
Regards,
Koji
Solved! Go to Solution.
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We confirmed the query of this thread and prepared the answers as below.
Q1. Is there any way to know that a lost arbitration of CAN Tx has been happen, both when CTRLRn.DAR == 0?
A1. There is no way to know arbitration lost.
Q2. How about lost arbitration detection when CTRLRn.DAR == 1?
A2. If the arbitration lost is detected, retransmission doesn't happen. Transmission is stopped.
When CTRLRn.DAR == 1, the re-transmission isn't executed if a lost arbitration. The transmission stops.