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TDA4VM: About the accuracy for Hardware TimeStamp of MCAN

ks
Intellectual 680 points
Part Number: TDA4VM

Hi, 

I found MCAN has hardware timestamp in 12.4.4.4.4 Timestamp Generation of TDA4 TRM.

And I tested the MCAN driver, it seems working.

I would to know when the hardware timestamp is appended.

1st byte Can Data of a CAN Frame or one complete CAN Frame received?

Is the Timestamp synced form GTC?

(12.10.1 Global Timebase Counter (GTC))

Br,

KS

  • 0
    TI__Guru* 75232 points

    Hi,

    Quoting the TRM "On start of a frame reception/transmission the counter value is captured and stored into the timestamp section of an Rx Buffer/Rx FIFO (RXTS[15-0]) or Tx Event FIFO (TXTS[15-0]) element."

    ks said:
    1st byte Can Data of a CAN Frame or one complete CAN Frame received?

    ks said:
    1st byte Can Data of a CAN Frame or one complete CAN Frame received?

    So it'll be the start of the frame in your case.

    ks said:
    Is the Timestamp synced form GTC?

    This comes from the MCAN ICLK, let me check if this can be synced with GTC.

    Regards,

    Karan