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TMS320F28P659DH-Q1: MCAN TX buffer questions

Kita Li
Intellectual 1985 points
Part Number: TMS320F28P659DH-Q1

Tool/software:

Hi experts,

Good day! I am asking for customer. My customer found this MCAN description in Errate manual. 

She wants to know the following information:

1. The maximal value and minimal value of "delay between the individual Tx requests".

2. If the time delay of two TXBAR writes are longer than this delay,  can it guarantee that the recipient can receive the message in sequence even if they have the same ID ?

Thanks!

Best Regards

Kita

  • 0
    TI__Mastermind 20692 points

    Hi Kita,

    I am looking into this and will provide a response by Tuesday next week (4/15/25).

    Thank you for your patience.

    Best Regards,

    Zackary Fleenor

  • 0 in reply to Fleenor
    TI__Mastermind 20692 points

    Hello Kita,

    We are still working internally with the team to provide more details regarding this Errata. Thank you for your patience. We will try to provide an answer before the EOW.

    Best Regards,

    Zackary Fleenor

  • 0 in reply to Fleenor
    TI__Intellectual 1985 points

    Hi Fleenor,

    Thanks for your information. Customer is still waiting for response and need your help to check it.

    Best Regards

    Kita

  • 0 in reply to Kita Li
    TI__Mastermind 34775 points

    Kita,

    This errata is from the original MCAN IP and has been there when incorporated to our C2000 devices.  To simulate and determine the minimum time delay between two transmission would require exhaustive and lengthy analysis.  Please recommend to customer to use the FIFO workaround.  Alternatively, customer can do an experiment by adjusting the time between transmissions to see determine the minimum value for successive TX buffer transmission, however since this is already a known bug for TX buffer, repeatability may not be assured.

    Best regards,

    Joseph