In this use case, the USB host is used to support several USB classes.
Prior to implement this use case, be sure to have already apply the UDI module "basic use case".
Content of conf_usb_host.h:
#define USB_HOST_UHI UHI_HID_MOUSE, UHI_MSC, UHI_CDC
#define USB_HOST_UHI UHI_HID_MOUSE, UHI_MSC, UHI_CDC