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/* ----------------------------------------------------------------------------
* ATMEL Microcontroller Software Support
* ----------------------------------------------------------------------------
* Copyright (c) 2008, Atmel Corporation
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the disclaimer below.
*
* Atmel's name may not be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ----------------------------------------------------------------------------
*/
//------------------------------------------------------------------------------
/// \unit
///
/// !!!Purpose
///
/// Re-definition of the standard USB endpoint descriptor with two additional
/// fields. This is required by the USB audio 1.00 specification.
///
/// !!!Usage
///
/// -# Declare an AUDEndpointDescriptor instance as part of the configuration
/// descriptors of an USB %audio %device.
//------------------------------------------------------------------------------
#ifndef AUDENDPOINTDESCRIPTOR_H
#define AUDENDPOINTDESCRIPTOR_H
//------------------------------------------------------------------------------
// Types
//------------------------------------------------------------------------------
#ifdef __ICCARM__ // IAR
#pragma pack(1) // IAR
#define __attribute__(...) // IAR
#endif // IAR
//------------------------------------------------------------------------------
/// Modified endpoint descriptor with two additional fields, with are
/// USB audio specific.
//------------------------------------------------------------------------------
typedef struct {
/// Size of the descriptor in bytes.
unsigned char bLength;
/// Descriptor type (USBGenericDescriptor_ENDPOINT).
unsigned char bDescriptorType;
/// Address and direction of the endpoint.
unsigned char bEndpointAddress;
/// Endpoint type and additional characteristics (for isochronous endpoints).
unsigned char bmAttributes;
/// Maximum packet size (in bytes) of the endpoint.
unsigned short wMaxPacketSize;
/// Polling rate of the endpoint.
unsigned char bInterval;
/// Refresh rate for a feedback endpoint.
unsigned char bRefresh;
/// Address of the associated feedback endpoint if any.
unsigned char bSyncAddress;
} __attribute__ ((packed)) AUDEndpointDescriptor; // GCC
#ifdef __ICCARM__ // IAR
#pragma pack() // IAR
#endif // IAR
#endif //#ifndef AUDENDPOINTDESCRIPTOR_H
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