audoutputterminaldescriptor.h

IAR5.2下 AT91SAM9260 ARM 对 MCP2515 控制源化码

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//------------------------------------------------------------------------------
/// \unit
/// !Purpose
/// 
/// Definition of a class for using USB audio output terminal descriptors.
///
/// !Usage
/// 
/// - For a USB device:
///     -# Declare a AUDOutputTerminalDescriptor instance as part of the
///        configuration descriptors of a USB audio device.
//------------------------------------------------------------------------------

#ifndef AUDOUTPUTTERMINALDESCRIPTOR_H
#define AUDOUTPUTTERMINALDESCRIPTOR_H

//------------------------------------------------------------------------------
//         Definitions
//------------------------------------------------------------------------------

//------------------------------------------------------------------------------
/// \page "Output terminal types"
/// This page lists the available types for an output terminal.
/// 
/// !Types
/// - AUDOutputTerminalDescriptor_SPEAKER

/// A terminal sending data to a USB host through an Isochronous endpoint.
#define AUDOutputTerminalDescriptor_SPEAKER             0x0301
//------------------------------------------------------------------------------

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

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

//------------------------------------------------------------------------------
/// \typedef AUDOutputTerminalDescriptor
/// Describes an output of the USB audio function.
//------------------------------------------------------------------------------
typedef struct {

    /// Size of descriptor in bytes.
    unsigned char bLength;
    /// Descriptor type (AUDGenericDescriptor_INTERFACE).
    unsigned char bDescriptorType;
    /// Descriptor subtype (AUDGenericDescriptor_OUTPUTTERMINAL).
    unsigned char bDescriptorSubType;
    /// Identifier for this terminal.
    unsigned char bTerminalID;
    /// Terminal type (see "Output terminal types").
    unsigned short wTerminalType;
    /// Identifier of the associated input terminal.
    unsigned char bAssocTerminal;
    /// Identifier of the unit or terminal to which this terminal is connected.
    unsigned char bSourceID;
    /// Index of a string descriptor for this terminal.
    unsigned char iTerminal;

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

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

#endif //#ifndef AUDOUTPUTTERMINALDESCRIPTOR_H