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Original question:

TCAN4550EVM: CAN message loss on TCAN4550

TCAN4550: Observed that some of the messages are missed out

LS
Prodigy 140 points
Part Number: TCAN4550

Tool/software:

Hello,

i am using TCAN4550 with MCU at 16 Mbps SPI,

trying sending standard frame ID CAN messages every 2 milliseconds,

capturing the sent messages with the help of USB-CAN analyzer,

the captured messages are less than the transmitted messages from tcan4550, e.g. sent 8192 messages and received 8190 messages,

-debugged to see

i) SPI status register, it does not show any SPI error,

ii) checked Error Counter register, it shows 0 errors in transmission,

but 2 messages are lost, may you please guide me where to look 

  • 0
    TI__Mastermind 28990 points

    Hello LS,

    The TCAN4550 uses the CAN FD Controller IP called MCAN that was developed by Bosch.  You can find detailed information on the TX Handling in the M_CAN User's Manual (Link) beyond what is listed in the TCAN4550 datasheet.  Without knowing anything about your configuration, I would suggest trying to monitor the TX Buffer Add Request Transmission Occurred (0x10D8) register or use the TX Event FIFO to track message transmissions.

    Regards,

    Jonathan