SAMV71 Xplained Ultra Software Package 1.5

AUDFeatureUnitRequest.c

Go to the documentation of this file.
00001 /* ---------------------------------------------------------------------------- */
00002 /*                  Atmel Microcontroller Software Support                      */
00003 /*                       SAM Software Package License                           */
00004 /* ---------------------------------------------------------------------------- */
00005 /* Copyright (c) 2015, Atmel Corporation                                        */
00006 /*                                                                              */
00007 /* All rights reserved.                                                         */
00008 /*                                                                              */
00009 /* Redistribution and use in source and binary forms, with or without           */
00010 /* modification, are permitted provided that the following condition is met:    */
00011 /*                                                                              */
00012 /* - Redistributions of source code must retain the above copyright notice,     */
00013 /* this list of conditions and the disclaimer below.                            */
00014 /*                                                                              */
00015 /* Atmel's name may not be used to endorse or promote products derived from     */
00016 /* this software without specific prior written permission.                     */
00017 /*                                                                              */
00018 /* DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR   */
00019 /* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */
00020 /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE   */
00021 /* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,      */
00022 /* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT */
00023 /* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,  */
00024 /* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    */
00025 /* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING         */
00026 /* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, */
00027 /* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                           */
00028 /* ---------------------------------------------------------------------------- */
00029 
00030 /** \file
00031  *
00032  * This file implements functions for USB AUDIO class feature unit requests.
00033  */
00034 
00035 /** \addtogroup usb_audio
00036  *@{
00037  */
00038 
00039 /*----------------------------------------------------------------------------
00040  *         Headers
00041  *----------------------------------------------------------------------------*/
00042 
00043 #include "AUDRequests.h"
00044 
00045 /*----------------------------------------------------------------------------
00046  *         Exported functions
00047  *----------------------------------------------------------------------------*/
00048 
00049 /**
00050  *  Returns the control selector value indicating the target of a Feature Unit
00051  *  request.
00052  *  \param request  Pointer to a USBGenericRequest instance.
00053  *  \sa usb_audio_ctrl_sel USB Audio Control selector values
00054  */
00055 uint8_t AUDFeatureUnitRequest_GetControl(const USBGenericRequest *request)
00056 {
00057     return ((USBGenericRequest_GetValue(request) >> 8) & 0xFF);
00058 }
00059 
00060 /**
00061  *  Returns the channel number of a Feature unit which should be altered by the
00062  *  given request.
00063  *  \param request  Pointer to a USBGenericRequest instance.
00064  */
00065 uint8_t AUDFeatureUnitRequest_GetChannel(const USBGenericRequest *request)
00066 {
00067     return (USBGenericRequest_GetValue(request) & 0xFF);
00068 }
00069 
00070 /**@}*/
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Defines