00001 /* ---------------------------------------------------------------------------- 00002 * SAM Software Package License 00003 * ---------------------------------------------------------------------------- 00004 * Copyright (c) 2014, Atmel Corporation 00005 * 00006 * All rights reserved. 00007 * 00008 * Redistribution and use in source and binary forms, with or without 00009 * modification, are permitted provided that the following conditions are met: 00010 * 00011 * - Redistributions of source code must retain the above copyright notice, 00012 * this list of conditions and the disclaimer below. 00013 * 00014 * Atmel's name may not be used to endorse or promote products derived from 00015 * this software without specific prior written permission. 00016 * 00017 * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR 00018 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 00019 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE 00020 * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, 00021 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00022 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 00023 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00024 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00025 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 00026 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00027 * ---------------------------------------------------------------------------- 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 /**@}*/