usb描述符

/** @defgroup USBD_DESC_Private_Variables USBD_DESC_Private_Variables
  * @brief Private variables.
  * @{
  */

USBD_DescriptorsTypeDef FS_Desc =
{
  USBD_FS_DeviceDescriptor
, USBD_FS_LangIDStrDescriptor
, USBD_FS_ManufacturerStrDescriptor
, USBD_FS_ProductStrDescriptor
, USBD_FS_SerialStrDescriptor
, USBD_FS_ConfigStrDescriptor
, USBD_FS_InterfaceStrDescriptor
};

usb设备状态

/*  Device Status */
#define USBD_STATE_DEFAULT                              0x01U
#define USBD_STATE_ADDRESSED                            0x02U
#define USBD_STATE_CONFIGURED                           0x03U
#define USBD_STATE_SUSPENDED                            0x04U