usbdevicequalifierdescriptor.h

Atmel的AT91SAM9263芯片的usb存储源程序

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/*
    Title: USBDeviceQualifierDescriptor

    About: Purpose
        Class for manipulating USB device qualifier descriptors.
*/

#ifndef USBDEVICEQUALIFIERDESCRIPTOR_H
#define USBDEVICEQUALIFIERDESCRIPTOR_H

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

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

/*
    Type: USBDeviceQualifierDescriptor
        Alternate device descriptor indicating the capabilities of the device
        in full-speed, if currently in high-speed; or in high-speed, if it is
        currently in full-speed. Only relevant for devices supporting the
        high-speed mode.

    Variables:
        bLength - Size of the descriptor in bytes.
        bDescriptorType - Descriptor type (<USBDESC_DEVICE_QUALIFIER>).
        bcdUSB - USB specification release number (in BCD format).
        bDeviceClass - Device class code.
        bDeviceSubClass - Device subclass code.
        bDeviceProtocol - Device protocol code.
        bMaxPacketSize0 - Maximum packet size of endpoint 0.
        bNumConfigurations - Number of possible configurations for the device.
        bReserved - Reserved.
*/
typedef struct {

   unsigned char bLength;           
   unsigned char bDescriptorType;   
   unsigned short bcdUSB;            
   unsigned char bDeviceClass;      
   unsigned char bDeviceSubClass;   
   unsigned char bDeviceProtocol;   
   unsigned char bMaxPacketSize0;   
   unsigned char bNumConfigurations;
   unsigned char bReserved;         

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

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

#endif //#ifndef USBDEVICEQUALIFIERDESCRIPTOR_H