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AM263P4-Q1: Automatic Retransmission After Arbitration Loss

Mari Tsunoda

Expert 5726 points

Part Number: AM263P4-Q1
Other Parts Discussed in Thread: AM263P4

Tool/software:

Hi Team,

My customer wants to ensure that if a packet is not sent due to losing during arbitration, then the packet will keep trying to transmit until it is successfully transmitted. Is their understanding correct that if they want to do this, they should set MCAN_InitParams::darEnable to 0? Is there anything else they should configure? They are referencing the MCU+SDK documentation below.

AM263Px MCU+ SDK: MCAN_InitParams Struct Reference

Best regards,

Mari

0 Ralph Jacobi 7 months ago

TI__Guru*** 135355 points

Hello Mari,

Our US team was on holiday leave Monday and was unavailable to provide support. Our MCAN expert will review this topic tomorrow.

Best Regards,

Ralph Jacobi

0 Mari Tsunoda 7 months ago in reply to Ralph Jacobi

TI__Expert 5726 points

Hi Ralph,

Thanks for your reply. I understand that yesterday was a holiday in the US.

Please keep me updated.

Best regards,

Mari

0 Brennan Hartigan 7 months ago in reply to Mari Tsunoda

TI__Genius 10846 points

Mari,

The customer should set MCAN_InitParams::darEnable to 0 in order for a packet to try and re-transmit until it is sucessfully transmitted.

According to the AM263P4 Technical Reference Manual, this is the default setting on the device:

However, you should still set this in SW.

Regards,

Brennan