Статическая инициализация объединения из структуры и массива

Пример:

#define DEVICE_DESCRIPTOR     0x01

#define USB_SPECIFICATION     0x0002

#define DEVICE_CLASS          0x02      // CDC class

#define DEVICE_SUB_CLASS      0      // each configuration has its own sub-class

#define DEVICE_PROTOCOL       0      // each configuration has its own protocol

#define EP_CONTROL_LENGTH     64

#define VENDOR_ID             0x03EB // Atmel vendor ID = 03EBh

#define PRODUCT_ID            0x201F // ID устройства

#define RELEASE_NUMBER        0x1000

#define MAN_INDEX             0x00

#define PROD_INDEX            0x00

#define SN_INDEX              0x00

#define NB_CONFIGURATION      1

typedef union {

  S_usb_device_descriptor ASSTRUCT;

  unsigned char ASBUFF[18];

}U_usb_device_descriptor_u;

static const U_usb_device_descriptor_u usb_device_descriptor =

{

  .ASSTRUCT = {

    18,

    DEVICE_DESCRIPTOR,

    USB_SPECIFICATION,

    DEVICE_CLASS,

    DEVICE_SUB_CLASS,

    DEVICE_PROTOCOL,

    EP_CONTROL_LENGTH,

    VENDOR_ID,

    PRODUCT_ID,

    RELEASE_NUMBER,

    MAN_INDEX,

    PROD_INDEX,

    SN_INDEX,

    NB_CONFIGURATION 

  }

  

};