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TCAN4550: Invalid setting about TCAN4550's message id mask

Jeff
Prodigy 50 points
Part Number: TCAN4550

Tool/software:

Hi Team:

As the following code show, after setting TCAN4550's message id mask,  we found that the TCAN's receive interupt still will be triggerd by any message id, please help to futher check it ,thanks.

/* Setup filters, this filter will mark any message with ID 0x200 as a priority message */
TCAN4x5x_MCAN_SID_Filter SID_ID = {0};
SID_ID.SFT = TCAN4x5x_SID_SFT_CLASSIC; // SFT: Standard filter type. Configured as a classic filter
SID_ID.SFEC = TCAN4x5x_SID_SFEC_PRIORITYSTORERX0; // Standard filter element configuration, store it in RX fifo 0 as a priority message
SID_ID.SFID1 = CANIF_RX_PDU_ID_DIAG; // SFID1 (Classic mode Filter)
SID_ID.SFID2 = 0x7FF; // SFID2 (Classic mode Mask)
TCAN4x5x_MCAN_WriteSIDFilter(0, &SID_ID); // Write to the MRAM
  • +1
    TI__Guru 53555 points

    Hi Jeff,

    How is the Global Filter Configuration being set up? With default values, the device will accept non-matching CAN frames to Rx FIFO 0. In order to reject non-matching frames, the ANFS field of the Global Filter Configuration register should be set to b10: 

    TCAN4x5x_MCAN_Global_Filter_Configuration gfc = {0};
    gfc.ANFS = TCAN4x5x_GFC_REJECT;
    TCAN4x5x_MCAN_ConfigureGlobalFilter(&gfc);

    Let me know if this is what was missing or if the behavior continues after including this part of the configuration. 

    Regards, 
    Eric Schott