Quentin Roche / X_NUCLEO_CCA02M1

Il y avait des problèmes dans la libraire...

Dependencies:   ST_FREQUENCY_DIVIDER ST_I2S USBDEVICE

Fork of X_NUCLEO_CCA02M1 by ST

BSP/PDM2PCMAudio.h@20:9952bef19da1, 2017-05-05 (annotated)

Committer:
Davidroid
Date:
Fri May 05 11:34:10 2017 +0000
Revision:
20:9952bef19da1
Parent:
17:a758b376b018 
Simplifying code.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
davide.aliprandi@st.com 2:9f389fd8fb2e 1 /**
davide.aliprandi@st.com 2:9f389fd8fb2e 2 ******************************************************************************
davide.aliprandi@st.com 2:9f389fd8fb2e 3 * @file PDM2PCMAudio.h
davide.aliprandi@st.com 2:9f389fd8fb2e 4 * @author AST / Software Platforms and Cloud
davide.aliprandi@st.com 2:9f389fd8fb2e 5 * @version V1.0
davide.aliprandi@st.com 2:9f389fd8fb2e 6 * @date November 10th, 2016
davide.aliprandi@st.com 2:9f389fd8fb2e 7 * @brief Class header file for the PDM2PCMAudio conversion library.
davide.aliprandi@st.com 2:9f389fd8fb2e 8 ******************************************************************************
davide.aliprandi@st.com 2:9f389fd8fb2e 9 * @attention
davide.aliprandi@st.com 2:9f389fd8fb2e 10 *
davide.aliprandi@st.com 2:9f389fd8fb2e 11 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
davide.aliprandi@st.com 2:9f389fd8fb2e 12 *
davide.aliprandi@st.com 2:9f389fd8fb2e 13 * Redistribution and use in source and binary forms, with or without modification,
davide.aliprandi@st.com 2:9f389fd8fb2e 14 * are permitted provided that the following conditions are met:
davide.aliprandi@st.com 2:9f389fd8fb2e 15 * 1. Redistributions of source code must retain the above copyright notice,
davide.aliprandi@st.com 2:9f389fd8fb2e 16 * this list of conditions and the following disclaimer.
davide.aliprandi@st.com 2:9f389fd8fb2e 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
davide.aliprandi@st.com 2:9f389fd8fb2e 18 * this list of conditions and the following disclaimer in the documentation
davide.aliprandi@st.com 2:9f389fd8fb2e 19 * and/or other materials provided with the distribution.
davide.aliprandi@st.com 2:9f389fd8fb2e 20 * 3. Neither the name of STMicroelectronics nor the names of its contributors
davide.aliprandi@st.com 2:9f389fd8fb2e 21 * may be used to endorse or promote products derived from this software
davide.aliprandi@st.com 2:9f389fd8fb2e 22 * without specific prior written permission.
davide.aliprandi@st.com 2:9f389fd8fb2e 23 *
davide.aliprandi@st.com 2:9f389fd8fb2e 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
davide.aliprandi@st.com 2:9f389fd8fb2e 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
davide.aliprandi@st.com 2:9f389fd8fb2e 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
davide.aliprandi@st.com 2:9f389fd8fb2e 27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
davide.aliprandi@st.com 2:9f389fd8fb2e 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
davide.aliprandi@st.com 2:9f389fd8fb2e 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
davide.aliprandi@st.com 2:9f389fd8fb2e 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
davide.aliprandi@st.com 2:9f389fd8fb2e 31 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
davide.aliprandi@st.com 2:9f389fd8fb2e 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
davide.aliprandi@st.com 2:9f389fd8fb2e 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
davide.aliprandi@st.com 2:9f389fd8fb2e 34 *
davide.aliprandi@st.com 2:9f389fd8fb2e 35 ******************************************************************************
davide.aliprandi@st.com 2:9f389fd8fb2e 36 */
davide.aliprandi@st.com 2:9f389fd8fb2e 37
davide.aliprandi@st.com 2:9f389fd8fb2e 38
davide.aliprandi@st.com 2:9f389fd8fb2e 39 /* Define to prevent recursive inclusion -------------------------------------*/
davide.aliprandi@st.com 2:9f389fd8fb2e 40
davide.aliprandi@st.com 2:9f389fd8fb2e 41 #ifndef __PDM2PCM_AUDIO_CLASS_H
davide.aliprandi@st.com 2:9f389fd8fb2e 42 #define __PDM2PCM_AUDIO_CLASS_H
davide.aliprandi@st.com 2:9f389fd8fb2e 43
davide.aliprandi@st.com 2:9f389fd8fb2e 44
Davidroid 17:a758b376b018 45 /* Configuration -------------------------------------------------------------*/
Davidroid 17:a758b376b018 46
Davidroid 17:a758b376b018 47 /**
Davidroid 17:a758b376b018 48 * Enable to use the OpenPDM2PCM library.
Davidroid 17:a758b376b018 49 */
Davidroid 17:a758b376b018 50 #define USE_OPEN_PDM2PCM_LIBRARY
Davidroid 17:a758b376b018 51
Davidroid 17:a758b376b018 52 /**
Davidroid 17:a758b376b018 53 * Enable to debug the duration of the PDM2PCM library functions through an
Davidroid 17:a758b376b018 54 * oscilloscope.
Davidroid 17:a758b376b018 55 */
Davidroid 17:a758b376b018 56 //#define PDM2PCM_AUDIO_DEBUG
Davidroid 17:a758b376b018 57
Davidroid 17:a758b376b018 58
davide.aliprandi@st.com 2:9f389fd8fb2e 59 /* Includes ------------------------------------------------------------------*/
davide.aliprandi@st.com 2:9f389fd8fb2e 60
davide.aliprandi@st.com 2:9f389fd8fb2e 61 #include "mbed.h"
davide.aliprandi@st.com 2:9f389fd8fb2e 62 #include "component_def.h"
davide.aliprandi@st.com 2:9f389fd8fb2e 63 #ifdef USE_OPEN_PDM2PCM_LIBRARY
davide.aliprandi@st.com 2:9f389fd8fb2e 64 #include "OpenPDMFilter.h"
davide.aliprandi@st.com 2:9f389fd8fb2e 65 #else
davide.aliprandi@st.com 2:9f389fd8fb2e 66 #include "pdm_filter.h"
davide.aliprandi@st.com 2:9f389fd8fb2e 67 #endif
davide.aliprandi@st.com 2:9f389fd8fb2e 68
davide.aliprandi@st.com 2:9f389fd8fb2e 69
davide.aliprandi@st.com 2:9f389fd8fb2e 70 /* Definitions ---------------------------------------------------------------*/
davide.aliprandi@st.com 2:9f389fd8fb2e 71
Davidroid 20:9952bef19da1 72 #define DEMUX_FILTER_SIZE 128
Davidroid 20:9952bef19da1 73 #define DEMUX_FILTER_MASK 0x55
Davidroid 20:9952bef19da1 74 #define PDM2PCM_FILTER_SIZE 4
Davidroid 20:9952bef19da1 75 #define PDM2PCM_NOGAIN_VOLUME 4
Davidroid 20:9952bef19da1 76 #define PDM2PCM_MAX_VOLUME 64
davide.aliprandi@st.com 2:9f389fd8fb2e 77
davide.aliprandi@st.com 2:9f389fd8fb2e 78
davide.aliprandi@st.com 2:9f389fd8fb2e 79 /* Classes -------------------------------------------------------------------*/
davide.aliprandi@st.com 2:9f389fd8fb2e 80
davide.aliprandi@st.com 2:9f389fd8fb2e 81 /** PDM2PCMAudio Conversion Library Class.
davide.aliprandi@st.com 2:9f389fd8fb2e 82 */
davide.aliprandi@st.com 2:9f389fd8fb2e 83 class PDM2PCMAudio
davide.aliprandi@st.com 2:9f389fd8fb2e 84 {
davide.aliprandi@st.com 2:9f389fd8fb2e 85 public:
davide.aliprandi@st.com 2:9f389fd8fb2e 86
davide.aliprandi@st.com 2:9f389fd8fb2e 87 /**
davide.aliprandi@st.com 2:9f389fd8fb2e 88 * @brief Constructor.
davide.aliprandi@st.com 2:9f389fd8fb2e 89 * @param frequency Audio sampling frequency.
davide.aliprandi@st.com 2:9f389fd8fb2e 90 * @param channels Number of audio channels to be recorded.
davide.aliprandi@st.com 2:9f389fd8fb2e 91 */
davide.aliprandi@st.com 2:9f389fd8fb2e 92 PDM2PCMAudio(uint32_t frequency, uint32_t channels) :
davide.aliprandi@st.com 2:9f389fd8fb2e 93 _frequency(frequency),
davide.aliprandi@st.com 2:9f389fd8fb2e 94 _channels(channels)
davide.aliprandi@st.com 2:9f389fd8fb2e 95 #ifdef PDM2PCM_AUDIO_DEBUG
davide.aliprandi@st.com 2:9f389fd8fb2e 96 , _pdm2pcm_audio_signal(D9)
davide.aliprandi@st.com 2:9f389fd8fb2e 97 #endif
davide.aliprandi@st.com 2:9f389fd8fb2e 98 {
davide.aliprandi@st.com 2:9f389fd8fb2e 99 /* Enable CRC peripheral to unlock the PDM2PCMAudio library. */
davide.aliprandi@st.com 2:9f389fd8fb2e 100 __CRC_CLK_ENABLE();
davide.aliprandi@st.com 2:9f389fd8fb2e 101
Davidroid 20:9952bef19da1 102 /* Setting configuration. */
Davidroid 20:9952bef19da1 103 switch (_frequency)
Davidroid 20:9952bef19da1 104 {
Davidroid 20:9952bef19da1 105 case I2S_AUDIOFREQ_8K:
Davidroid 20:9952bef19da1 106 _decimation_factor = 128;
Davidroid 20:9952bef19da1 107 break;
Davidroid 20:9952bef19da1 108
Davidroid 20:9952bef19da1 109 case I2S_AUDIOFREQ_16K:
Davidroid 20:9952bef19da1 110 case I2S_AUDIOFREQ_32K:
Davidroid 20:9952bef19da1 111 case I2S_AUDIOFREQ_44K:
Davidroid 20:9952bef19da1 112 case I2S_AUDIOFREQ_48K:
Davidroid 20:9952bef19da1 113 default:
Davidroid 20:9952bef19da1 114 _decimation_factor = 64;
Davidroid 20:9952bef19da1 115 break;
Davidroid 20:9952bef19da1 116 }
Davidroid 20:9952bef19da1 117
davide.aliprandi@st.com 2:9f389fd8fb2e 118 /* Initializing PDM2PCMAudio Filter. */
davide.aliprandi@st.com 2:9f389fd8fb2e 119 for (uint32_t i = 0; i < _channels; i++)
davide.aliprandi@st.com 2:9f389fd8fb2e 120 {
davide.aliprandi@st.com 2:9f389fd8fb2e 121 /* Filter LP and HP Init */
davide.aliprandi@st.com 2:9f389fd8fb2e 122 _PDM2PCM_filter[i].LP_HZ = _frequency / 2;
davide.aliprandi@st.com 2:9f389fd8fb2e 123 _PDM2PCM_filter[i].HP_HZ = 10;
davide.aliprandi@st.com 2:9f389fd8fb2e 124 _PDM2PCM_filter[i].Fs = _frequency;
davide.aliprandi@st.com 2:9f389fd8fb2e 125 _PDM2PCM_filter[i].Out_MicChannels = _channels;
davide.aliprandi@st.com 2:9f389fd8fb2e 126 _PDM2PCM_filter[i].In_MicChannels = _channels;
Davidroid 20:9952bef19da1 127 _PDM2PCM_filter[i].Decimation = _decimation_factor;
Davidroid 20:9952bef19da1 128 _PDM2PCM_filter[i].MaxVolume = PDM2PCM_MAX_VOLUME;
davide.aliprandi@st.com 16:4ab2eac7be21 129 #ifdef USE_OPEN_PDM2PCM_LIBRARY
davide.aliprandi@st.com 2:9f389fd8fb2e 130 Open_PDM_Filter_Init((TPDMFilter_InitStruct *) &_PDM2PCM_filter[i]);
davide.aliprandi@st.com 2:9f389fd8fb2e 131 #else
davide.aliprandi@st.com 2:9f389fd8fb2e 132 PDM_Filter_Init((PDMFilter_InitStruct *) &_PDM2PCM_filter[i]);
davide.aliprandi@st.com 2:9f389fd8fb2e 133 #endif
davide.aliprandi@st.com 2:9f389fd8fb2e 134 }
davide.aliprandi@st.com 2:9f389fd8fb2e 135 };
davide.aliprandi@st.com 2:9f389fd8fb2e 136
davide.aliprandi@st.com 2:9f389fd8fb2e 137 /**
Davidroid 20:9952bef19da1 138 * @brief Getting number of PCM samples from nummber of PDM samples.
Davidroid 20:9952bef19da1 139 * @param PCM_samples Number of PCM samples.
Davidroid 20:9952bef19da1 140 * @retval Number of equivalent PDM samples.
Davidroid 20:9952bef19da1 141 */
Davidroid 20:9952bef19da1 142 uint32_t pcm2pdm_samples(uint32_t PCM_samples);
Davidroid 20:9952bef19da1 143
Davidroid 20:9952bef19da1 144 /**
Davidroid 20:9952bef19da1 145 * @brief Converting audio data from PDM to PCM.
Davidroid 20:9952bef19da1 146 * @param output_buffer Pointer to output PCM buffer data.
Davidroid 20:9952bef19da1 147 * @param input_buffer Pointer to input PDM buffer data.
Davidroid 20:9952bef19da1 148 * @param volume Volume level (it must be in the range [0..PDM2PCM_MAX_VOLUME]).
Davidroid 20:9952bef19da1 149 * @retval COMPONENT_OK in case of success, COMPONENT_ERROR otherwise.
Davidroid 20:9952bef19da1 150 */
Davidroid 20:9952bef19da1 151 status_t convert(int16_t *output_buffer, uint16_t *input_buffer, uint32_t volume);
davide.aliprandi@st.com 2:9f389fd8fb2e 152
davide.aliprandi@st.com 2:9f389fd8fb2e 153 /**
davide.aliprandi@st.com 2:9f389fd8fb2e 154 * @brief Scrambling audio data.
davide.aliprandi@st.com 2:9f389fd8fb2e 155 * @param output_buffer Pointer to output PDM buffer data.
davide.aliprandi@st.com 2:9f389fd8fb2e 156 * @param input_buffer Pointer to input PDM buffer data.
davide.aliprandi@st.com 2:9f389fd8fb2e 157 * @param size Size of the buffers (thay has to be equally sized).
davide.aliprandi@st.com 2:9f389fd8fb2e 158 * @retval COMPONENT_OK in case of success, COMPONENT_ERROR otherwise.
davide.aliprandi@st.com 2:9f389fd8fb2e 159 */
davide.aliprandi@st.com 2:9f389fd8fb2e 160 status_t scramble(uint16_t *output_buffer, uint16_t *input_buffer, uint32_t size);
davide.aliprandi@st.com 2:9f389fd8fb2e 161
davide.aliprandi@st.com 2:9f389fd8fb2e 162 /**
davide.aliprandi@st.com 2:9f389fd8fb2e 163 * @brief Demuxing audio data.
davide.aliprandi@st.com 2:9f389fd8fb2e 164 * @param output_buffer Pointer to output PDM buffer data.
davide.aliprandi@st.com 2:9f389fd8fb2e 165 * @param input_buffer Pointer to input PDM buffer data.
davide.aliprandi@st.com 2:9f389fd8fb2e 166 * @param size Size of the buffers (thay has to be equally sized).
davide.aliprandi@st.com 2:9f389fd8fb2e 167 * @retval COMPONENT_OK in case of success, COMPONENT_ERROR otherwise.
davide.aliprandi@st.com 2:9f389fd8fb2e 168 */
davide.aliprandi@st.com 2:9f389fd8fb2e 169 status_t demux(uint16_t *output_buffer, uint16_t *input_buffer, uint32_t size);
davide.aliprandi@st.com 2:9f389fd8fb2e 170
davide.aliprandi@st.com 2:9f389fd8fb2e 171
davide.aliprandi@st.com 2:9f389fd8fb2e 172 protected:
davide.aliprandi@st.com 2:9f389fd8fb2e 173
davide.aliprandi@st.com 2:9f389fd8fb2e 174 uint32_t _frequency;
davide.aliprandi@st.com 2:9f389fd8fb2e 175 uint32_t _channels;
Davidroid 20:9952bef19da1 176 uint32_t _decimation_factor;
davide.aliprandi@st.com 2:9f389fd8fb2e 177 #ifdef USE_OPEN_PDM2PCM_LIBRARY
davide.aliprandi@st.com 2:9f389fd8fb2e 178 TPDMFilter_InitStruct _PDM2PCM_filter[PDM2PCM_FILTER_SIZE];
davide.aliprandi@st.com 2:9f389fd8fb2e 179 #else
davide.aliprandi@st.com 2:9f389fd8fb2e 180 PDMFilter_InitStruct _PDM2PCM_filter[PDM2PCM_FILTER_SIZE];
davide.aliprandi@st.com 2:9f389fd8fb2e 181 #endif
davide.aliprandi@st.com 2:9f389fd8fb2e 182 static const uint8_t _demux_filter[DEMUX_FILTER_SIZE];
davide.aliprandi@st.com 2:9f389fd8fb2e 183
davide.aliprandi@st.com 2:9f389fd8fb2e 184 #ifdef PDM2PCM_AUDIO_DEBUG
davide.aliprandi@st.com 2:9f389fd8fb2e 185 DigitalOut _pdm2pcm_audio_signal;
davide.aliprandi@st.com 2:9f389fd8fb2e 186 #endif
davide.aliprandi@st.com 2:9f389fd8fb2e 187 };
davide.aliprandi@st.com 2:9f389fd8fb2e 188
davide.aliprandi@st.com 2:9f389fd8fb2e 189 #endif /* __PDM2PCM_AUDIO_CLASS_H */
davide.aliprandi@st.com 2:9f389fd8fb2e 190
davide.aliprandi@st.com 2:9f389fd8fb2e 191 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/