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/**
 \unit

 !!!Purpose

 Definition of a class for manipulating CDC union descriptors.

 !!!Usage

 Should be included in the list of USB descriptor used for a device
 configuration.
*/

#ifndef CDCUNIONDESCRIPTOR_H
#define CDCUNIONDESCRIPTOR_H

//------------------------------------------------------------------------------
//         Types
//------------------------------------------------------------------------------

#ifdef __ICCARM__          // IAR
#pragma pack(1)            // IAR
#define __attribute__(...) // IAR
#endif                     // IAR

//------------------------------------------------------------------------------
/// Describes the relationship between a group of interfaces that can
/// be considered to form a functional unit.
//------------------------------------------------------------------------------
typedef struct {

    /// Size of the descriptor in bytes.
    unsigned char bFunctionLength;
    /// Descriptor type (CDCDescriptors_INTERFACE).
    unsigned char bDescriptorType;
    /// Descriptor subtype (CDCDescriptors_UNION).
    unsigned char bDescriptorSubtype;
    /// Number of the master interface for this union.
    unsigned char bMasterInterface;
    /// Number of the first slave interface for this union.
    unsigned char bSlaveInterface0;

} __attribute__ ((packed)) CDCUnionDescriptor; // GCC

#ifdef __ICCARM__          // IAR
#pragma pack()             // IAR
#endif                     // IAR

#endif //#ifndef CDCUNIONDESCRIPTOR_H