Senior Design: Sound Monitor / AudioDemo

Audio Demo with DISCO Board, takes control samples, waits for user input, samples regularly.

Dependencies:   CMSIS_DSP_401 STM32L4xx_HAL_Driver mbed-src_DISO_AUDIO_DEMO

audio_if.cpp@0:3eee9435dd17, 2015-12-13 (annotated)

Committer:
EricLew
Date:
Sun Dec 13 19:12:11 2015 +0000
Revision:
0:3eee9435dd17
Audio Demo using DISCO Board

Who changed what in which revision?

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EricLew 0:3eee9435dd17 1 /**
EricLew 0:3eee9435dd17 2 ******************************************************************************
EricLew 0:3eee9435dd17 3 * @file /Src/audio_if.c
EricLew 0:3eee9435dd17 4 * @author Central Labs
EricLew 0:3eee9435dd17 5 * @version V1.0.0
EricLew 0:3eee9435dd17 6 * @date 7-May-2015
EricLew 0:3eee9435dd17 7 * @brief USB Device Audio interface file.
EricLew 0:3eee9435dd17 8 ******************************************************************************
EricLew 0:3eee9435dd17 9 @attention
EricLew 0:3eee9435dd17 10 *
EricLew 0:3eee9435dd17 11 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
EricLew 0:3eee9435dd17 12 *
EricLew 0:3eee9435dd17 13 * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
EricLew 0:3eee9435dd17 14 * You may not use this file except in compliance with the License.
EricLew 0:3eee9435dd17 15 * You may obtain a copy of the License at:
EricLew 0:3eee9435dd17 16 *
EricLew 0:3eee9435dd17 17 * http://www.st.com/software_license_agreement_liberty_v2
EricLew 0:3eee9435dd17 18 *
EricLew 0:3eee9435dd17 19 * Redistribution and use in source and binary forms, with or without modification,
EricLew 0:3eee9435dd17 20 * are permitted provided that the following conditions are met:
EricLew 0:3eee9435dd17 21 * 1. Redistributions of source code must retain the above copyright notice,
EricLew 0:3eee9435dd17 22 * this list of conditions and the following disclaimer.
EricLew 0:3eee9435dd17 23 * 2. Redistributions in binary form must reproduce the above copyright notice,
EricLew 0:3eee9435dd17 24 * this list of conditions and the following disclaimer in the documentation
EricLew 0:3eee9435dd17 25 * and/or other materials provided with the distribution.
EricLew 0:3eee9435dd17 26 * 3. Neither the name of STMicroelectronics nor the names of its contributors
EricLew 0:3eee9435dd17 27 * may be used to endorse or promote products derived from this software
EricLew 0:3eee9435dd17 28 * without specific prior written permission.
EricLew 0:3eee9435dd17 29 *
EricLew 0:3eee9435dd17 30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
EricLew 0:3eee9435dd17 31 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
EricLew 0:3eee9435dd17 32 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
EricLew 0:3eee9435dd17 33 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
EricLew 0:3eee9435dd17 34 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
EricLew 0:3eee9435dd17 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
EricLew 0:3eee9435dd17 36 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
EricLew 0:3eee9435dd17 37 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
EricLew 0:3eee9435dd17 38 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
EricLew 0:3eee9435dd17 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
EricLew 0:3eee9435dd17 40 *
EricLew 0:3eee9435dd17 41 ******************************************************************************
EricLew 0:3eee9435dd17 42 */
EricLew 0:3eee9435dd17 43
EricLew 0:3eee9435dd17 44 /* Includes ------------------------------------------------------------------*/
EricLew 0:3eee9435dd17 45 #include "audio_if.h"
EricLew 0:3eee9435dd17 46
EricLew 0:3eee9435dd17 47 //uint16_t PDM_Buffer[AUDIO_CHANNELS*AUDIO_SAMPLING_FREQUENCY/1000*64/8];
EricLew 0:3eee9435dd17 48 //static uint16_t PCM_Buffer[AUDIO_CHANNELS*AUDIO_SAMPLING_FREQUENCY/1000];
EricLew 0:3eee9435dd17 49
EricLew 0:3eee9435dd17 50 /* Private typedef -----------------------------------------------------------*/
EricLew 0:3eee9435dd17 51 /* Private define ------------------------------------------------------------*/
EricLew 0:3eee9435dd17 52 /* Private macro -------------------------------------------------------------*/
EricLew 0:3eee9435dd17 53 /* Private function prototypes -----------------------------------------------*/
EricLew 0:3eee9435dd17 54 /* Private variables ---------------------------------------------------------*/
EricLew 0:3eee9435dd17 55
EricLew 0:3eee9435dd17 56
EricLew 0:3eee9435dd17 57 /* Private functions ---------------------------------------------------------*/
EricLew 0:3eee9435dd17 58 /* This table maps the audio device class setting in 1/256 dB to a
EricLew 0:3eee9435dd17 59 * linear 0-64 scaling used in pdm_filter.c. It is computed as
EricLew 0:3eee9435dd17 60 * 256*20*log10(index/64). */
EricLew 0:3eee9435dd17 61 //const int16_t vol_table[65] =
EricLew 0:3eee9435dd17 62 //{ 0x8000, 0xDBE0, 0xE1E6, 0xE56B, 0xE7EB, 0xE9DB, 0xEB70, 0xECC7,
EricLew 0:3eee9435dd17 63 //0xEDF0, 0xEEF6, 0xEFE0, 0xF0B4, 0xF176, 0xF228, 0xF2CD, 0xF366,
EricLew 0:3eee9435dd17 64 //0xF3F5, 0xF47C, 0xF4FB, 0xF574, 0xF5E6, 0xF652, 0xF6BA, 0xF71C,
EricLew 0:3eee9435dd17 65 //0xF778, 0xF7D6, 0xF82D, 0xF881, 0xF8D2, 0xF920, 0xF96B, 0xF9B4,
EricLew 0:3eee9435dd17 66 //0xF9FB, 0xFA3F, 0xFA82, 0xFAC2, 0xFB01, 0xFB3E, 0xFB79, 0xFBB3,
EricLew 0:3eee9435dd17 67 //0xFBEB, 0xFC22, 0xFC57, 0xFC8C, 0xFCBF, 0xFCF1, 0xFD22, 0xFD51,
EricLew 0:3eee9435dd17 68 //0xFD80, 0xFDAE, 0xFDDB, 0xFE07, 0xFE32, 0xFE5D, 0xFE86, 0xFEAF,
EricLew 0:3eee9435dd17 69 //0xFED7, 0xFF00, 0xFF25, 0xFF4B, 0xFF70, 0xFF95, 0xFFB9, 0xFFD0,
EricLew 0:3eee9435dd17 70 //0x0000 };
EricLew 0:3eee9435dd17 71
EricLew 0:3eee9435dd17 72 //volatile uint8_t VolumeSetting=64;
EricLew 0:3eee9435dd17 73
EricLew 0:3eee9435dd17 74 /**
EricLew 0:3eee9435dd17 75 * @brief Initializes the AUDIO media low layer.
EricLew 0:3eee9435dd17 76 * @param AudioFreq: Audio frequency used to play the audio stream.
EricLew 0:3eee9435dd17 77 * @param BitRes: desired bit resolution
EricLew 0:3eee9435dd17 78 * @param ChnlNbr: number of channel to be configured
EricLew 0:3eee9435dd17 79 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 80 */
EricLew 0:3eee9435dd17 81 int8_t Audio_Init(void)
EricLew 0:3eee9435dd17 82 {
EricLew 0:3eee9435dd17 83 return BSP_AUDIO_IN_Init(48000, 16, 1);
EricLew 0:3eee9435dd17 84 }
EricLew 0:3eee9435dd17 85
EricLew 0:3eee9435dd17 86
EricLew 0:3eee9435dd17 87
EricLew 0:3eee9435dd17 88 /**
EricLew 0:3eee9435dd17 89 * @brief Start audio recording engine
EricLew 0:3eee9435dd17 90 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 91 */
EricLew 0:3eee9435dd17 92 int8_t Audio_Record(uint16_t * recbuff)
EricLew 0:3eee9435dd17 93 {
EricLew 0:3eee9435dd17 94 int8_t res = BSP_AUDIO_IN_Record(recbuff, 2048);
EricLew 0:3eee9435dd17 95 // AudioProcess(pbuf, recbuff);
EricLew 0:3eee9435dd17 96 return res;
EricLew 0:3eee9435dd17 97 }
EricLew 0:3eee9435dd17 98
EricLew 0:3eee9435dd17 99 /**
EricLew 0:3eee9435dd17 100 * @brief Controls AUDIO Volume.
EricLew 0:3eee9435dd17 101 * @param vol: Volume level
EricLew 0:3eee9435dd17 102 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 103 */
EricLew 0:3eee9435dd17 104 //int8_t Audio_VolumeCtl(int16_t Volume)
EricLew 0:3eee9435dd17 105 //{
EricLew 0:3eee9435dd17 106 // /* Call low layer volume setting function */
EricLew 0:3eee9435dd17 107 // int j;
EricLew 0:3eee9435dd17 108 //
EricLew 0:3eee9435dd17 109 // j = 0;
EricLew 0:3eee9435dd17 110 // /* Find the setting nearest to the desired setting */
EricLew 0:3eee9435dd17 111 // while(j<64 &&
EricLew 0:3eee9435dd17 112 // abs(Volume-vol_table[j]) > abs(Volume-vol_table[j+1])) {
EricLew 0:3eee9435dd17 113 // j++;
EricLew 0:3eee9435dd17 114 // }
EricLew 0:3eee9435dd17 115 // /* Now do the volume adjustment */
EricLew 0:3eee9435dd17 116 // VolumeSetting = (uint8_t)j;
EricLew 0:3eee9435dd17 117 // return BSP_AUDIO_IN_SetVolume(VolumeSetting);
EricLew 0:3eee9435dd17 118 //
EricLew 0:3eee9435dd17 119 //
EricLew 0:3eee9435dd17 120 //}
EricLew 0:3eee9435dd17 121
EricLew 0:3eee9435dd17 122 /**
EricLew 0:3eee9435dd17 123 * @brief Controls AUDIO Mute.
EricLew 0:3eee9435dd17 124 * @param cmd: Command opcode
EricLew 0:3eee9435dd17 125 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 126 */
EricLew 0:3eee9435dd17 127 //int8_t Audio_MuteCtl(uint8_t cmd)
EricLew 0:3eee9435dd17 128 //{
EricLew 0:3eee9435dd17 129 // return AUDIO_OK;
EricLew 0:3eee9435dd17 130 //}
EricLew 0:3eee9435dd17 131
EricLew 0:3eee9435dd17 132
EricLew 0:3eee9435dd17 133 /**
EricLew 0:3eee9435dd17 134 * @brief Stops audio acquisition
EricLew 0:3eee9435dd17 135 * @param none
EricLew 0:3eee9435dd17 136 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 137 */
EricLew 0:3eee9435dd17 138 int8_t Audio_Stop(void)
EricLew 0:3eee9435dd17 139 {
EricLew 0:3eee9435dd17 140 return BSP_AUDIO_IN_Stop();
EricLew 0:3eee9435dd17 141
EricLew 0:3eee9435dd17 142 }
EricLew 0:3eee9435dd17 143
EricLew 0:3eee9435dd17 144 /**
EricLew 0:3eee9435dd17 145 * @brief Pauses audio acquisition
EricLew 0:3eee9435dd17 146 * @param none
EricLew 0:3eee9435dd17 147 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 148 */
EricLew 0:3eee9435dd17 149 //
EricLew 0:3eee9435dd17 150 //int8_t Audio_Pause(void)
EricLew 0:3eee9435dd17 151 //{
EricLew 0:3eee9435dd17 152 // return 0;
EricLew 0:3eee9435dd17 153 //}
EricLew 0:3eee9435dd17 154
EricLew 0:3eee9435dd17 155
EricLew 0:3eee9435dd17 156 /**
EricLew 0:3eee9435dd17 157 * @brief Resumes audio acquisition
EricLew 0:3eee9435dd17 158 * @param none
EricLew 0:3eee9435dd17 159 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 160 */
EricLew 0:3eee9435dd17 161 //int8_t Audio_Resume(void)
EricLew 0:3eee9435dd17 162 //{
EricLew 0:3eee9435dd17 163 // return AUDIO_OK;
EricLew 0:3eee9435dd17 164 //}
EricLew 0:3eee9435dd17 165
EricLew 0:3eee9435dd17 166 /**
EricLew 0:3eee9435dd17 167 * @brief Manages command from usb
EricLew 0:3eee9435dd17 168 * @param None
EricLew 0:3eee9435dd17 169 * @retval AUDIO_OK in case of success, AUDIO_ERROR otherwise
EricLew 0:3eee9435dd17 170 */
EricLew 0:3eee9435dd17 171 //
EricLew 0:3eee9435dd17 172 //int8_t Audio_CommandMgr(uint8_t cmd)
EricLew 0:3eee9435dd17 173 //{
EricLew 0:3eee9435dd17 174 // return AUDIO_OK;
EricLew 0:3eee9435dd17 175 //}
EricLew 0:3eee9435dd17 176 //
EricLew 0:3eee9435dd17 177 //void AudioProcess(uint16_t * pbuf, uint16_t * recbuff)
EricLew 0:3eee9435dd17 178 //{
EricLew 0:3eee9435dd17 179 // BSP_AUDIO_IN_PDMToPCM(pbuf,recbuff);
EricLew 0:3eee9435dd17 180 // // need to copy recbuff to final output buff (in chunks)
EricLew 0:3eee9435dd17 181 //}
EricLew 0:3eee9435dd17 182
EricLew 0:3eee9435dd17 183
EricLew 0:3eee9435dd17 184
EricLew 0:3eee9435dd17 185
EricLew 0:3eee9435dd17 186
EricLew 0:3eee9435dd17 187 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
EricLew 0:3eee9435dd17 188