hiddescriptor.h

Atmel的ARM7芯片AT91SAM7X256的USB读写键盘程序

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/*
    Title: HIDDescriptor

    About: Purpose
        Methods and definitions for manipulating a HID descriptor.
*/

#ifndef HIDDESCRIPTOR_H
#define HIDDESCRIPTOR_H

//------------------------------------------------------------------------------
//         Definitions
//------------------------------------------------------------------------------
/*
    Constants: HID release numbers
        HIDDescriptor_HID1_11 - Identifies version 1.11 of the HID specification.
*/
#define HIDDescriptor_HID1_11           0x0111

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

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

/*
    Type: HIDDescriptor
        Identifies the length of type of subordinate descriptors of a HID
        device. This particular type only supports one subordinate descriptor.

    Variables:
        bLength - Size of descriptor in bytes.
        bDescriptorType - Descriptor type (<HIDGenericDescriptor_HID>).
        bcdHID - HID class specification release number in BCD format.
        bCountryCode - Country code of the device if it is localized.
        bNumDescriptors - Number of subordinate descriptors.
        bDescriptorType0 - Type of the first subordinate descriptor.
        bDescriptorLength0 - Size in bytes of the first subordinate descriptor.
*/
typedef struct {

    unsigned char bLength;
    unsigned char bDescriptorType;
    unsigned short bcdHID;
    unsigned char bCountryCode; 
    unsigned char bNumDescriptors;
    unsigned char bDescriptorType0;
    unsigned short wDescriptorLength0;

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

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

#endif //#ifndef HIDDESCRIPTOR_H