There are various configurable parameters that are listed in Table 3-3. Users can configure a CAN or SPI packet frame, the size of the FIFO, or the maximum size of the data area by modifying these parameters which are all defined in user_define.h.

Users can also modify the definition of Custom_Element in user_define.h. Entries can be increased or decreased based on application and storage requirements.

/*user-defined information storage structure */
typedef struct {
    /*! Origin Identifier, indicating the origin of the message */
    uint32_t origin_id;
    /*! Destination Identifier, indicating the destination of the message */
    uint32_t destination_id;
    /*! Data Length Code */
    uint8_t dlc;
    /*! Data bytes */
    uint8_t data[TRANSMIT_DATA_LENGTH];
} Custom_Element;

The reception and transmission of the two communication interfaces are separated. Messages are delivered through FIFO. As a result, users can make changes to the structure. For example, making messages follow a specific format or even a specific communication protocol. In addition, the structure can be split into a one-way transmission according to Figure 2-3.