void main(void)
{
    struct zcan_frame message;
    int ret;

    // Initialize CAN Bus
    can_init();

    // Initialize SPI
    spi_init();

    // Example CAN message to send
    message.id_type = CAN_STANDARD_IDENTIFIER;
    message.rtr = CAN_DATAFRAME;
    message.dlc = 4;
    message.data[0] = 0xAA;
    message.data[1] = 0xBB;
    message.data[2] = 0xCC;
    message.data[3] = 0xDD;

    // Send CAN message
    ret = can_send(&message);
    if (ret < 0) {
        printk("Error sending CAN message\n");
    }

    // Receive CAN message
    ret = can_receive(&message);
    if (ret < 0) {
        printk("Error receiving CAN message\n");
    } else {
        printk("Received CAN message: ID=0x%X DLC=%d Data=%X %X %X %X\n",
               message.id, message.dlc,
               message.data[0], message.data[1],
               message.data[2], message.data[3]);
    }

    while (1) {
        k_sleep(K_FOREVER);
    }
}

void can_init(void)
{
    // Implement CAN initialization here
    // Example:
    // struct device *can_dev = device_get_binding(DT_LABEL(DT_NODELABEL(can0)));
    // can_configure(can_dev, ...);
    // Verify initialization and handle errors
}

int can_send(const struct zcan_frame *msg)
{
    // Implement CAN message send functionality
    // Example:
    // return can_send_message(can_dev, msg, K_NO_WAIT);
}

int can_receive(struct zcan_frame *msg)
{
    // Implement CAN message receive functionality
    // Example:
    // return can_receive_message(can_dev, msg, K_FOREVER);
}

void spi_init(void)
{
    // Implement SPI initialization here
    // Example:
    // struct device *spi_dev = device_get_binding(DT_LABEL(DT_NODELABEL(spi0)));
    // spi_configure(spi_dev, ...);
    // Verify initialization and handle errors
}

void main(void)
{
    struct zcan_frame message;
    int ret;

    // Initialize CAN Bus
    can_init();

    // Initialize SPI
    spi_init();

    // Example CAN message to send
    message.id_type = CAN_STANDARD_IDENTIFIER;
    message.rtr = CAN_DATAFRAME;
    message.dlc = 4;
    message.data[0] = 0xAA;
    message.data[1] = 0xBB;
    message.data[2] = 0xCC;
    message.data[3] = 0xDD;

    // Send CAN message
    ret = can_send(&message);
    if (ret < 0) {
        printk("Error sending CAN message\n");
    }

    // Receive CAN message
    ret = can_receive(&message);
    if (ret < 0) {
        printk("Error receiving CAN message\n");
    } else {
        printk("Received CAN message: ID=0x%X DLC=%d Data=%X %X %X %X\n",
               message.id, message.dlc,
               message.data[0], message.data[1],
               message.data[2], message.data[3]);
    }

    while (1) {
        k_sleep(K_FOREVER);
    }
}

void can_init(void)
{
    // Implement CAN initialization here
    // Example:
    // struct device *can_dev = device_get_binding(DT_LABEL(DT_NODELABEL(can0)));
    // can_configure(can_dev, ...);
    // Verify initialization and handle errors
}

int can_send(const struct zcan_frame *msg)
{
    // Implement CAN message send functionality
    // Example:
    // return can_send_message(can_dev, msg, K_NO_WAIT);
}

int can_receive(struct zcan_frame *msg)
{
    // Implement CAN message receive functionality
    // Example:
    // return can_receive_message(can_dev, msg, K_FOREVER);
}

void spi_init(void)
{
    // Implement SPI initialization here
    // Example:
    // struct device *spi_dev = device_get_binding(DT_LABEL(DT_NODELABEL(spi0)));
    // spi_configure(spi_dev, ...);
    // Verify initialization and handle errors
}