usbinterfacedescriptor.h

Atmel的AT91SAM7x256芯片的usb存储的源程序

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/*
    Title: USBInterfaceDescriptor

    About: Purpose
        Definition of a class for manipulating USB interface descriptors.
*/

#ifndef USBINTERFACEDESCRIPTOR_H
#define USBINTERFACEDESCRIPTOR_H

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

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

/*
    Type: USBInterfaceDescriptor
        USB standard interface descriptor structure.

    Variables:
        bLength - Size of the descriptor in bytes.
        bDescriptorType - Descriptor type (<USBDESC_INTERFACE>).
        bInterfaceNumber - Number of the interface in its configuration.
        bAlternateSetting - Value to select this alternate interface setting.
        bNumEndpoints - Number of endpoints used by the inteface (excluding
                        endpoint 0).
        bInterfaceClass - Interface class code.
        bInterfaceSubClass - Interface subclass code.
        bInterfaceProtocol - Interface protocol code.
        iInterface - Index of the interface string descriptor.
*/
typedef struct {

   unsigned char bLength;           
   unsigned char bDescriptorType;   
   unsigned char bInterfaceNumber;  
   unsigned char bAlternateSetting; 
   unsigned char bNumEndpoints;     
   unsigned char bInterfaceClass;   
   unsigned char bInterfaceSubClass;
   unsigned char bInterfaceProtocol;
   unsigned char iInterface;        
                                    
} __attribute__ ((packed)) USBInterfaceDescriptor; // GCC

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

#endif //#ifndef USBINTERFACEDESCRIPTOR_H