| Christina Quast | b123d74 | 2014-12-23 13:03:36 +0100 | [diff] [blame] | 1 | /* ---------------------------------------------------------------------------- |
| 2 | * ATMEL Microcontroller Software Support |
| 3 | * ---------------------------------------------------------------------------- |
| 4 | * Copyright (c) 2008, Atmel Corporation |
| 5 | * |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions are met: |
| 10 | * |
| 11 | * - Redistributions of source code must retain the above copyright notice, |
| 12 | * this list of conditions and the disclaimer below. |
| 13 | * |
| 14 | * Atmel's name may not be used to endorse or promote products derived from |
| 15 | * this software without specific prior written permission. |
| 16 | * |
| 17 | * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR |
| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE |
| 20 | * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, |
| 23 | * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 24 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 25 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| 26 | * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * ---------------------------------------------------------------------------- |
| 28 | */ |
| 29 | |
| 30 | /** \file |
| 31 | * |
| 32 | * This file implements functions for USB AUDIO class feature unit requests. |
| 33 | */ |
| 34 | |
| 35 | /** \addtogroup usb_audio |
| 36 | *@{ |
| 37 | */ |
| 38 | |
| 39 | /*---------------------------------------------------------------------------- |
| 40 | * Headers |
| 41 | *----------------------------------------------------------------------------*/ |
| 42 | |
| 43 | #include "AUDRequests.h" |
| 44 | |
| 45 | /*---------------------------------------------------------------------------- |
| 46 | * Exported functions |
| 47 | *----------------------------------------------------------------------------*/ |
| 48 | |
| 49 | /** |
| 50 | * Returns the control selector value indicating the target of a Feature Unit |
| 51 | * request. |
| 52 | * \param request Pointer to a USBGenericRequest instance. |
| 53 | * \sa usb_audio_ctrl_sel USB Audio Control selector values |
| 54 | */ |
| 55 | uint8_t AUDFeatureUnitRequest_GetControl(const USBGenericRequest *request) |
| 56 | { |
| 57 | return ((USBGenericRequest_GetValue(request) >> 8) & 0xFF); |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Returns the channel number of a Feature unit which should be altered by the |
| 62 | * given request. |
| 63 | * \param request Pointer to a USBGenericRequest instance. |
| 64 | */ |
| 65 | uint8_t AUDFeatureUnitRequest_GetChannel(const USBGenericRequest *request) |
| 66 | { |
| 67 | return (USBGenericRequest_GetValue(request) & 0xFF); |
| 68 | } |
| 69 | |
| 70 | /**@}*/ |