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124 lines
4.6 KiB
C
124 lines
4.6 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2010, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/** \file
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*
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* Definitions and classes for USB Audio class requests.
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*
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* - For a USB %device:
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* -# After receiving an Audio request from the host, use
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* AUDGenericRequest_GetEntity to determine the target Unit or Terminal.
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* -# After receiving an Audio request from the host, use
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* AUDGenericRequest_GetInterface to know which interface is referenced.
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* -# Use AUDFeatureUnitRequest_GetControl to determine which control
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* shall be tweaked following a host request.
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* -# Use AUDFeatureUnitRequest_GetChannel to identify the channel which
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* will have its control altered.
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*/
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#ifndef _AUDREQUESTS_H_
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#define _AUDREQUESTS_H_
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/** \addtogroup usb_audio
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*@{
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*/
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/*----------------------------------------------------------------------------
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* Includes
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*----------------------------------------------------------------------------*/
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#include <USBRequests.h>
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/*----------------------------------------------------------------------------
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* Definitions
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*----------------------------------------------------------------------------*/
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/** \addtogroup usb_audio_request USB Audio request codes
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* @{
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* This section lists the codes of the existing Audio requests.
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* - \ref AUDGenericRequest_SETCUR
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* - \ref AUDGenericRequest_GETCUR
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*/
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/** SET_CUR request code.*/
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#define AUDGenericRequest_SETCUR 0x01
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/** GET_CUR request code.*/
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#define AUDGenericRequest_GETCUR 0x81
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/** GET_MIN request code.*/
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#define AUDGenericRequest_GETMIN 0x82
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/** GET_MAX request code.*/
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#define AUDGenericRequest_GETMAX 0x83
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/** GET_RES request code.*/
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#define AUDGenericRequest_GETRES 0x84
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/** @}*/
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/** \addtogroup usb_audio_ctrl_sel USB Audio Control selector values
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* @{
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* This section lists the available control selectors for a Feature Unit request.
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* - \ref AUDFeatureUnitRequest_MUTE
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*/
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/** Mute control selector (MUTE_CONTROL). */
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#define AUDFeatureUnitRequest_MUTE 0x01
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/** Volume control selector (VOLUME_CONTROL). */
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#define AUDFeatureUnitRequest_VOLUME 0x02
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/** @}*/
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/*----------------------------------------------------------------------------
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* Types
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*----------------------------------------------------------------------------*/
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#ifdef __ICCARM__ /* IAR */
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#pragma pack(1) /* IAR */
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#define __attribute__(...) /* IAR */
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#endif /* IAR */
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#ifdef __ICCARM__ /* IAR */
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#pragma pack() /* IAR */
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#endif /* IAR */
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/*----------------------------------------------------------------------------
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* Functions
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*----------------------------------------------------------------------------*/
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extern uint8_t AUDGenericRequest_GetEntity(
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const USBGenericRequest *request);
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extern uint8_t AUDGenericRequest_GetInterface(
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const USBGenericRequest *request);
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extern uint8_t AUDFeatureUnitRequest_GetControl(
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const USBGenericRequest *request);
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extern uint8_t AUDFeatureUnitRequest_GetChannel(
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const USBGenericRequest *request);
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/**@}*/
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#endif /* _AUDREQUESTS_H_ */
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