cdcuniondescriptor.h

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/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support 
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 * Copyright (c) 2008, Atmel Corporation
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/*
    Title: CDCUnionDescriptor

    About: Purpose
        Definition of a class for manipulating CDC union descriptors.

    About: 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

/*
    Type: CDCUnionDescriptor
        Describes the relationship between a group of interfaces that can
        be considered to form a functional unit.

    Variables:
        bFunctionLength - Size of the descriptor in bytes.
        bDescriptorType - Descriptor type (<CDCDescriptors_INTERFACE>).
        bDescriptorSubtype - Descriptor subtype (<CDCDescriptors_UNION>).
        bMasterInterface - Number of the master interface for this union.
        bSlaveInterface0 - Number of the first slave interface for this union.
*/
typedef struct {

    unsigned char bFunctionLength;
    unsigned char bDescriptorType;
    unsigned char bDescriptorSubtype;
    unsigned char bMasterInterface;
    unsigned char bSlaveInterface0;

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

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

#endif //#ifndef CDCUNIONDESCRIPTOR_H