hiddkeyboardoutputreport.h

Atmel的AT91SAM9263芯片的usb HID设备keyboard的源程序

/* ----------------------------------------------------------------------------
 *         ATMEL Microcontroller Software Support  -  ROUSSET  -
 * ----------------------------------------------------------------------------
 * Copyright (c) 2006, 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 disclaiimer below.
 * 
 * - Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the disclaimer below in the documentation and/or
 * other materials provided with the distribution. 
 * 
 * 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.
 * ----------------------------------------------------------------------------
 */

/*
    Title: HIDDKeyboardOutputReport

    About: Purpose
        Definition of a class for manipulating HID keyboard output reports.

    About: Usage
        1 - Initialize a newly-created output report instance with
            <HIDDKeyboardOutputReport_Initialize>.
        2 - Retrieve the status of the three LEDs using
            <HIDDKeyboardOutputReport_GetNumLockStatus>,
            <HIDDKeyboardOutputReport_GetCapsLockStatus> and
            <HIDDKeyboardOutputReport_GetScrollLockStatus>.
*/

#ifndef HIDKEYBOARDOUTPUTREPORT_H
#define HIDKEYBOARDOUTPUTREPORT_H

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

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

/*
    Type: HIDDKeyboardOutputReport
        HID output report structure used by the host to control the state of
        the keyboard LEDs.

        Only the first three bits are relevant, the other 5 are used as
        padding bits.

    Variables:
        numLockStatus - State of the num. lock LED.
        capsLockStatus - State of the caps lock LED.
        scrollLockStatus - State of the scroll lock LED.
        padding - Padding bits.
*/
typedef struct {

    unsigned char numLockStatus:1,
                  capsLockStatus:1,
                  scrollLockStatus:1,
                  padding:5;

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

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

//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------
/*
    Function: HIDDKeyboardOutputReport_Initialize
        Initializes a keyboard output report.

    Parameters:
        report - Pointer to a HIDDKeyboardOutputReport instance.
*/
extern void HIDDKeyboardOutputReport_Initialize(HIDDKeyboardOutputReport *report);

/*
    Function: HIDDKeyboardOutputReport_GetNumLockStatus
        Indicates the current status of the num. lock LED according to the
        given report.

    Parameters:
        report - Pointer to a HIDDKeyboardOutputReport instance.

    Returns:
        1 if the num. lock LED is light on; otherwise 0.
*/
extern unsigned char HIDDKeyboardOutputReport_GetNumLockStatus(
    const HIDDKeyboardOutputReport *report);

/*
    Function: HIDDKeyboardOutputReport_GetCapsLockStatus
        Indicates the current status of the caps lock LED according to the
        given report.

    Parameters:
        report - Pointer to a HIDDKeyboardOutputReport instance.

    Returns:
        1 if the caps lock LED is light on; otherwise 0.
*/
extern unsigned char HIDDKeyboardOutputReport_GetCapsLockStatus(
    const HIDDKeyboardOutputReport *report);

/*
    Function: HIDDKeyboardOutputReport_GetScrollLockStatus
        Indicates the current status of the scroll lock LED according to the
        given report.

    Parameters:
        report - Pointer to a HIDDKeyboardOutputReport instance.

    Returns:
        1 if the scroll lock LED is light on; otherwise 0.
*/
extern unsigned char HIDDKeyboardOutputReport_GetScrollLockStatus(
    const HIDDKeyboardOutputReport *report);

#endif //#ifndef HIDKEYBOARDOUTPUTREPORT_H