Platform-Specific Implementations

This section describes XRUSB’s implementation principles and construction patterns across different platforms. To use different classes, simply pass pointers to them at the end of the constructor.
It is recommended to derive the USB device serial number from the platform’s Unique ID (UID) and pass it as a byte array in the constructor.

Example:

/* USB Classes */
LibXR::USB::CDCUart cdc_uart;
LibXR::USB::HIDKeyboard hid_keyboard;

static constexpr auto LANG_PACK =
    LibXR::USB::DescriptorStrings::MakeLanguagePack(
        /* Language Code */
        LibXR::USB::DescriptorStrings::Language::EN_US, 
        /* Manufacturer */
        "XRobot",
        /* Product */
        "XRUSB USB CDC Demo", 
        /* Serial Number string prefix (human-readable) */
        "XRUSB-DEMO-");


XXXUSBDevice usb(
    /* USB Hardware and Endpoints config */
    ..., 
    /* EP0 Packet Size */
    USB::DeviceDescriptor::PacketSize0::SIZE_8,
    /* Vendor ID */
    0x483,
    /* Product ID */
    0x5740,
    /* BcdDevice */
    0xF407,
    /* Language Pack */
    LANG_PACK,
    /* Classes */
    {{&cdc_uart, &hid_keyboard}},
    /* Serial Number UID (hex byte array, e.g. from MCU UID) */
    {addr, size});