from usbh_def.h:296
typedef struct _ConfigurationDescriptor
{
uint8_t bLength;
uint8_t bDescriptorType;
uint16_t wTotalLength;
uint8_t bNumInterfaces;
uint8_t bConfigurationValue;
uint8_t iConfiguration;
uint8_t bmAttributes;
uint8_t bMaxPower;
USBH_InterfaceDescTypeDef Itf_Desc[USBH_MAX_NUM_INTERFACES];
}
USBH_CfgDescTypeDef;