hello-world-dot-c

  uint32_t GetIndex = 0;

          /* Calculate Rx FIFO 0 element index */
        GetIndex += ((hfdcan->Instance->RXF0S & FDCAN_RXF0S_F0GI) >> FDCAN_RXF0S_F0GI_Pos);

        /* Calculate Rx FIFO 0 element address */
        RxAddress = (uint32_t *)(hfdcan->msgRam.RxFIFO0SA + (GetIndex * SRAMCAN_RF0_SIZE));

            /* Retrieve IdType */
    pRxHeader->IdType = *RxAddress & FDCAN_ELEMENT_MASK_XTD;