Senior Design: Sound Monitor / OneHopeOnePrayer

AudioRecord

Dependencies:   STM32L4xx_HAL_Driver CMSIS_DSP_401

audio_record.c@3:ec7e3c37fe80, 2015-11-26 (annotated)

Committer:
EricLew
Date:
Thu Nov 26 22:32:56 2015 +0000
Revision:
3:ec7e3c37fe80
Parent:
1:1ae4b642c533 
FFT is currently not working and commented out

Who changed what in which revision?

UserRevisionLine numberNew contents of line
EricLew 0:d4e5ad7ad71c 1 /* Includes ------------------------------------------------------------------*/
EricLew 0:d4e5ad7ad71c 2 #include "main.h"
EricLew 0:d4e5ad7ad71c 3
EricLew 0:d4e5ad7ad71c 4 /* Variable indicating which audio demo is currently running (playback v.s. record) */
EricLew 0:d4e5ad7ad71c 5 Audio_DemoTypeDef AudioDemo = AUDIO_DEMO_NONE;
EricLew 0:d4e5ad7ad71c 6
EricLew 3:ec7e3c37fe80 7
EricLew 3:ec7e3c37fe80 8
EricLew 3:ec7e3c37fe80 9
EricLew 0:d4e5ad7ad71c 10 /* Private typedef -----------------------------------------------------------*/
EricLew 0:d4e5ad7ad71c 11 typedef enum
EricLew 0:d4e5ad7ad71c 12 {
EricLew 0:d4e5ad7ad71c 13 BUFFER_OFFSET_NONE = 0,
EricLew 0:d4e5ad7ad71c 14 BUFFER_OFFSET_HALF,
EricLew 0:d4e5ad7ad71c 15 BUFFER_OFFSET_FULL,
EricLew 0:d4e5ad7ad71c 16 } RecordBufferOffset_Typedef;
EricLew 0:d4e5ad7ad71c 17
EricLew 0:d4e5ad7ad71c 18
EricLew 0:d4e5ad7ad71c 19 /* Private define ------------------------------------------------------------*/
EricLew 0:d4e5ad7ad71c 20 /* Size (in bytes) of the buffer containing the recorded PCM samples */
EricLew 1:1ae4b642c533 21 #define RECORD_BUFFER_SIZE (uint32_t)1024 //BUFFER SIZE IS THE SAME FOR BOTH RECORDINGS
EricLew 0:d4e5ad7ad71c 22
EricLew 0:d4e5ad7ad71c 23 /* Buffer containing the PCM samples coming from the microphone */
EricLew 1:1ae4b642c533 24 static uint32_t RecordBuffer[RECORD_BUFFER_SIZE]; //RECORDING BUFFER FOR SAMPLE #0
EricLew 1:1ae4b642c533 25 static uint32_t RecordBuffer1[RECORD_BUFFER_SIZE];//RECORDING BUFFER FOR SAMPLE #1
EricLew 0:d4e5ad7ad71c 26
EricLew 0:d4e5ad7ad71c 27 /* Buffer used to stream the recorded PCM samples towards the audio codec. */
EricLew 3:ec7e3c37fe80 28 static uint32_t PlaybackBuffer[2048]; //PLAYBACK BUFFER FOR SAMPLE#0
EricLew 3:ec7e3c37fe80 29 static uint32_t PlaybackBuffer1[2048];//PLAYBACK BUFFER FOR SAMPLE#1
EricLew 3:ec7e3c37fe80 30
EricLew 0:d4e5ad7ad71c 31
EricLew 0:d4e5ad7ad71c 32 #define NB_SAMPLES_RATE 7
EricLew 1:1ae4b642c533 33 static uint32_t SamplesRates[NB_SAMPLES_RATE] = {BSP_AUDIO_FREQUENCY_48K}; //SAMPLE RATE IS THE SAME
EricLew 0:d4e5ad7ad71c 34
EricLew 0:d4e5ad7ad71c 35 /* Information indicating which part of the recorded buffer is ready for audio loopback */
EricLew 0:d4e5ad7ad71c 36 static RecordBufferOffset_Typedef RecordBufferOffset = BUFFER_OFFSET_NONE;
EricLew 0:d4e5ad7ad71c 37
EricLew 0:d4e5ad7ad71c 38 /* Private function prototypes -----------------------------------------------*/
EricLew 0:d4e5ad7ad71c 39 /* Display actuyel record sample rate */
EricLew 0:d4e5ad7ad71c 40 static void SampleRateDisplay(uint8_t SampleRate);
EricLew 0:d4e5ad7ad71c 41
EricLew 0:d4e5ad7ad71c 42 /* Record sample rate selection */
EricLew 0:d4e5ad7ad71c 43 static void SampleRateSelection(void);
EricLew 0:d4e5ad7ad71c 44
EricLew 0:d4e5ad7ad71c 45 /* Audio recorder callback functions */
EricLew 0:d4e5ad7ad71c 46 static void AudioRecord_TransferComplete_CallBack(void);
EricLew 0:d4e5ad7ad71c 47 static void AudioRecord_HalfTransfer_CallBack(void);
EricLew 0:d4e5ad7ad71c 48 static void AudioRecord_Error_CallBack(void);
EricLew 0:d4e5ad7ad71c 49
EricLew 0:d4e5ad7ad71c 50 /* Private functions ---------------------------------------------------------*/
EricLew 0:d4e5ad7ad71c 51
EricLew 0:d4e5ad7ad71c 52 /**
EricLew 0:d4e5ad7ad71c 53 * @brief Setup and start audio recording in loopback mode
EricLew 0:d4e5ad7ad71c 54 * @param None
EricLew 0:d4e5ad7ad71c 55 * @retval None
EricLew 0:d4e5ad7ad71c 56 */
EricLew 0:d4e5ad7ad71c 57 void AudioRecord_demo(void)
EricLew 0:d4e5ad7ad71c 58 {
EricLew 0:d4e5ad7ad71c 59 /* Indicates which part of the payback buffer must be updated */
EricLew 0:d4e5ad7ad71c 60 uint8_t transfer_range = 0;
EricLew 0:d4e5ad7ad71c 61
EricLew 1:1ae4b642c533 62 /* Flag indicating whether the audio codec has already been initialized */
EricLew 0:d4e5ad7ad71c 63 uint32_t audio_loop_back_init = RESET ;
EricLew 1:1ae4b642c533 64
EricLew 0:d4e5ad7ad71c 65 /* Audio record demo is running */
EricLew 0:d4e5ad7ad71c 66 AudioDemo = AUDIO_DEMO_RECORD;
EricLew 0:d4e5ad7ad71c 67
EricLew 0:d4e5ad7ad71c 68 /* Turn off green LED5 */
EricLew 0:d4e5ad7ad71c 69 BSP_LED_Off(LED5);
EricLew 0:d4e5ad7ad71c 70
EricLew 0:d4e5ad7ad71c 71 /* Initialize record buffer offset */
EricLew 0:d4e5ad7ad71c 72 RecordBufferOffset = BUFFER_OFFSET_NONE;
EricLew 0:d4e5ad7ad71c 73
EricLew 0:d4e5ad7ad71c 74 /* Select the audio record sample rate */
EricLew 0:d4e5ad7ad71c 75 SampleRateSelection();
EricLew 1:1ae4b642c533 76 //INITIALIZE RECORDING #0
EricLew 0:d4e5ad7ad71c 77 /* Initialize audio input */
EricLew 0:d4e5ad7ad71c 78 if (BSP_AUDIO_IN_Init(SamplesRates[SampleRateIndex],
EricLew 0:d4e5ad7ad71c 79 DEFAULT_AUDIO_IN_BIT_RESOLUTION,
EricLew 0:d4e5ad7ad71c 80 DEFAULT_AUDIO_IN_CHANNEL_NBR) != AUDIO_OK)
EricLew 0:d4e5ad7ad71c 81 {
EricLew 0:d4e5ad7ad71c 82 /* Record Error */
EricLew 0:d4e5ad7ad71c 83 Error_Handler();
EricLew 0:d4e5ad7ad71c 84 }
EricLew 0:d4e5ad7ad71c 85
EricLew 0:d4e5ad7ad71c 86 /* Set Callback function pointers */
EricLew 0:d4e5ad7ad71c 87 BSP_AUDIO_IN_RegisterCallbacks(AudioRecord_Error_CallBack,
EricLew 0:d4e5ad7ad71c 88 AudioRecord_HalfTransfer_CallBack,
EricLew 0:d4e5ad7ad71c 89 AudioRecord_TransferComplete_CallBack);
EricLew 0:d4e5ad7ad71c 90
EricLew 0:d4e5ad7ad71c 91 /* Start the audio record */
EricLew 0:d4e5ad7ad71c 92 if (BSP_AUDIO_IN_Record((uint16_t*)&RecordBuffer[0],
EricLew 0:d4e5ad7ad71c 93 RECORD_BUFFER_SIZE) != AUDIO_OK)
EricLew 0:d4e5ad7ad71c 94 {
EricLew 0:d4e5ad7ad71c 95 Error_Handler();
EricLew 0:d4e5ad7ad71c 96 }
EricLew 1:1ae4b642c533 97 uint32_t counter=0; //COUNTER IS REGISTER R4
EricLew 0:d4e5ad7ad71c 98 /* PCM samples recording loop */
EricLew 0:d4e5ad7ad71c 99 while (AudioRecordExit != SET)
EricLew 0:d4e5ad7ad71c 100 {
EricLew 1:1ae4b642c533 101
EricLew 1:1ae4b642c533 102 if (counter==10000000) //Approximately 3 seconds of record time
EricLew 1:1ae4b642c533 103 {
EricLew 1:1ae4b642c533 104 AudioRecordExit=1;
EricLew 1:1ae4b642c533 105 }
EricLew 1:1ae4b642c533 106 else
EricLew 1:1ae4b642c533 107 {
EricLew 1:1ae4b642c533 108 counter=counter++;
EricLew 1:1ae4b642c533 109 }
EricLew 0:d4e5ad7ad71c 110 /* 1st or 2nd half of the record buffer ready for being copied
EricLew 0:d4e5ad7ad71c 111 to the playback buffer */
EricLew 0:d4e5ad7ad71c 112 if(RecordBufferOffset != BUFFER_OFFSET_NONE)
EricLew 0:d4e5ad7ad71c 113 {
EricLew 0:d4e5ad7ad71c 114 /* Copy half of the record buffer to the playback buffer */
EricLew 0:d4e5ad7ad71c 115 if(RecordBufferOffset == BUFFER_OFFSET_HALF)
EricLew 0:d4e5ad7ad71c 116 {
EricLew 0:d4e5ad7ad71c 117 memcpy(&PlaybackBuffer[(RECORD_BUFFER_SIZE/2) * transfer_range],
EricLew 0:d4e5ad7ad71c 118 RecordBuffer,
EricLew 0:d4e5ad7ad71c 119 RECORD_BUFFER_SIZE);
EricLew 0:d4e5ad7ad71c 120
EricLew 0:d4e5ad7ad71c 121
EricLew 0:d4e5ad7ad71c 122 }
EricLew 0:d4e5ad7ad71c 123 else /* if(RecordBufferOffset == BUFFER_OFFSET_FULL)*/
EricLew 0:d4e5ad7ad71c 124 {
EricLew 0:d4e5ad7ad71c 125 memcpy(&PlaybackBuffer[(RECORD_BUFFER_SIZE/2) * transfer_range],
EricLew 0:d4e5ad7ad71c 126 &RecordBuffer[RECORD_BUFFER_SIZE/2],
EricLew 0:d4e5ad7ad71c 127 RECORD_BUFFER_SIZE);
EricLew 0:d4e5ad7ad71c 128 }
EricLew 0:d4e5ad7ad71c 129
EricLew 0:d4e5ad7ad71c 130 /* Wait for next data */
EricLew 0:d4e5ad7ad71c 131 RecordBufferOffset = BUFFER_OFFSET_NONE;
EricLew 0:d4e5ad7ad71c 132 transfer_range = (transfer_range+1) % 4;
EricLew 0:d4e5ad7ad71c 133 }
EricLew 0:d4e5ad7ad71c 134 }
EricLew 0:d4e5ad7ad71c 135
EricLew 0:d4e5ad7ad71c 136
EricLew 1:1ae4b642c533 137 /* Stop audio input */
EricLew 1:1ae4b642c533 138 if (BSP_AUDIO_IN_Stop() != AUDIO_OK)
EricLew 1:1ae4b642c533 139 {
EricLew 1:1ae4b642c533 140 Error_Handler();
EricLew 1:1ae4b642c533 141 }
EricLew 1:1ae4b642c533 142 /* De-initialize audio input */
EricLew 1:1ae4b642c533 143 if (BSP_AUDIO_IN_DeInit() != AUDIO_OK)
EricLew 1:1ae4b642c533 144 {
EricLew 1:1ae4b642c533 145 Error_Handler();
EricLew 1:1ae4b642c533 146 }
EricLew 1:1ae4b642c533 147 //END OF RECORDING #0
EricLew 1:1ae4b642c533 148 //INITIALIZE RECORDING #1
EricLew 1:1ae4b642c533 149 transfer_range = 0;
EricLew 1:1ae4b642c533 150
EricLew 1:1ae4b642c533 151 /* Flag indicating whether the audio codec has already been initialized */
EricLew 1:1ae4b642c533 152 audio_loop_back_init = RESET ;
EricLew 1:1ae4b642c533 153
EricLew 1:1ae4b642c533 154 /* Turn off green LED5 */
EricLew 1:1ae4b642c533 155 BSP_LED_Off(LED5);
EricLew 0:d4e5ad7ad71c 156
EricLew 1:1ae4b642c533 157 /* Initialize record buffer offset */
EricLew 1:1ae4b642c533 158 RecordBufferOffset = BUFFER_OFFSET_NONE;
EricLew 1:1ae4b642c533 159 /* Initialize audio input */
EricLew 1:1ae4b642c533 160 if (BSP_AUDIO_IN_Init(SamplesRates[SampleRateIndex],
EricLew 1:1ae4b642c533 161 DEFAULT_AUDIO_IN_BIT_RESOLUTION,
EricLew 1:1ae4b642c533 162 DEFAULT_AUDIO_IN_CHANNEL_NBR) != AUDIO_OK)
EricLew 1:1ae4b642c533 163 {
EricLew 1:1ae4b642c533 164 /* Record Error */
EricLew 1:1ae4b642c533 165 Error_Handler();
EricLew 1:1ae4b642c533 166 }
EricLew 1:1ae4b642c533 167
EricLew 1:1ae4b642c533 168 /* Set Callback function pointers */
EricLew 1:1ae4b642c533 169 BSP_AUDIO_IN_RegisterCallbacks(AudioRecord_Error_CallBack,
EricLew 1:1ae4b642c533 170 AudioRecord_HalfTransfer_CallBack,
EricLew 1:1ae4b642c533 171 AudioRecord_TransferComplete_CallBack);
EricLew 1:1ae4b642c533 172
EricLew 1:1ae4b642c533 173 /* Start the audio record */
EricLew 1:1ae4b642c533 174 if (BSP_AUDIO_IN_Record((uint16_t*)&RecordBuffer1[0],
EricLew 1:1ae4b642c533 175 RECORD_BUFFER_SIZE) != AUDIO_OK)
EricLew 1:1ae4b642c533 176 {
EricLew 1:1ae4b642c533 177 Error_Handler();
EricLew 1:1ae4b642c533 178 }
EricLew 1:1ae4b642c533 179
EricLew 1:1ae4b642c533 180 AudioRecordExit = 0; //RESET AUDIO RECORD FLAG
EricLew 1:1ae4b642c533 181 counter=0; //RESET COUNTER
EricLew 1:1ae4b642c533 182 /* PCM samples recording loop */ //COPIED FROM ABOVE USE '1' WHEN REFERENCING VARIABLES
EricLew 1:1ae4b642c533 183 while (AudioRecordExit != SET)
EricLew 1:1ae4b642c533 184 {
EricLew 1:1ae4b642c533 185
EricLew 1:1ae4b642c533 186 if (counter==10000000) //Approximately 3 seconds of record time
EricLew 1:1ae4b642c533 187 {
EricLew 1:1ae4b642c533 188 AudioRecordExit=1; //FLAG IS REGISTER R5
EricLew 1:1ae4b642c533 189 }
EricLew 1:1ae4b642c533 190 else
EricLew 1:1ae4b642c533 191 {
EricLew 1:1ae4b642c533 192 counter=counter++;
EricLew 1:1ae4b642c533 193 }
EricLew 1:1ae4b642c533 194 /* 1st or 2nd half of the record buffer ready for being copied
EricLew 1:1ae4b642c533 195 to the playback buffer */
EricLew 1:1ae4b642c533 196 if(RecordBufferOffset != BUFFER_OFFSET_NONE)
EricLew 1:1ae4b642c533 197 {
EricLew 1:1ae4b642c533 198 /* Copy half of the record buffer to the playback buffer */
EricLew 1:1ae4b642c533 199 if(RecordBufferOffset == BUFFER_OFFSET_HALF)
EricLew 1:1ae4b642c533 200 {
EricLew 1:1ae4b642c533 201 memcpy(&PlaybackBuffer1[(RECORD_BUFFER_SIZE/2) * transfer_range],
EricLew 1:1ae4b642c533 202 RecordBuffer1,
EricLew 1:1ae4b642c533 203 RECORD_BUFFER_SIZE);
EricLew 1:1ae4b642c533 204
EricLew 1:1ae4b642c533 205
EricLew 1:1ae4b642c533 206 }
EricLew 1:1ae4b642c533 207 else /* if(RecordBufferOffset == BUFFER_OFFSET_FULL)*/
EricLew 1:1ae4b642c533 208 {
EricLew 1:1ae4b642c533 209 memcpy(&PlaybackBuffer1[(RECORD_BUFFER_SIZE/2) * transfer_range],
EricLew 1:1ae4b642c533 210 &RecordBuffer1[RECORD_BUFFER_SIZE/2],
EricLew 1:1ae4b642c533 211 RECORD_BUFFER_SIZE);
EricLew 1:1ae4b642c533 212 }
EricLew 1:1ae4b642c533 213
EricLew 1:1ae4b642c533 214 /* Wait for next data */
EricLew 1:1ae4b642c533 215 RecordBufferOffset = BUFFER_OFFSET_NONE;
EricLew 1:1ae4b642c533 216 transfer_range = (transfer_range+1) % 4;
EricLew 1:1ae4b642c533 217 }
EricLew 1:1ae4b642c533 218 }
EricLew 1:1ae4b642c533 219
EricLew 0:d4e5ad7ad71c 220
EricLew 0:d4e5ad7ad71c 221 /* Stop audio input */
EricLew 0:d4e5ad7ad71c 222 if (BSP_AUDIO_IN_Stop() != AUDIO_OK)
EricLew 0:d4e5ad7ad71c 223 {
EricLew 0:d4e5ad7ad71c 224 Error_Handler();
EricLew 0:d4e5ad7ad71c 225 }
EricLew 1:1ae4b642c533 226
EricLew 0:d4e5ad7ad71c 227 /* De-initialize audio input */
EricLew 0:d4e5ad7ad71c 228 if (BSP_AUDIO_IN_DeInit() != AUDIO_OK)
EricLew 0:d4e5ad7ad71c 229 {
EricLew 0:d4e5ad7ad71c 230 Error_Handler();
EricLew 0:d4e5ad7ad71c 231 }
EricLew 1:1ae4b642c533 232 //END OF RECORDING #1
EricLew 0:d4e5ad7ad71c 233 /* Turn OFF LED5: stop record */
EricLew 0:d4e5ad7ad71c 234 BSP_LED_Off(LED5);
EricLew 0:d4e5ad7ad71c 235
EricLew 0:d4e5ad7ad71c 236 /* Reset AudioRecordExit flag */
EricLew 0:d4e5ad7ad71c 237 AudioRecordExit = 0;
EricLew 1:1ae4b642c533 238
EricLew 3:ec7e3c37fe80 239 // uint32_t fftLenReal=4096;
EricLew 3:ec7e3c37fe80 240 // uint32_t ifftFlagR=0;
EricLew 3:ec7e3c37fe80 241 // uint32_t bitReverseFlag=0;
EricLew 3:ec7e3c37fe80 242 //
EricLew 3:ec7e3c37fe80 243 // arm_rfft_init_q31 (arm_rfft_instance_q31, fftLenReal, ifftFlagR, bitReverseFlag)
EricLew 3:ec7e3c37fe80 244 //
EricLew 3:ec7e3c37fe80 245 //
EricLew 3:ec7e3c37fe80 246 // arm_rfft_q31 ( const arm_rfft_instance_q31 * S, &PlaybackBuffer,
EricLew 3:ec7e3c37fe80 247 //q31_t * pDst
EricLew 3:ec7e3c37fe80 248 //)
EricLew 3:ec7e3c37fe80 249 //
EricLew 3:ec7e3c37fe80 250
EricLew 1:1ae4b642c533 251
EricLew 0:d4e5ad7ad71c 252 /* Turn off green led */
EricLew 0:d4e5ad7ad71c 253 AudioDemo = AUDIO_DEMO_NONE;
EricLew 0:d4e5ad7ad71c 254 }
EricLew 0:d4e5ad7ad71c 255
EricLew 0:d4e5ad7ad71c 256 /**
EricLew 0:d4e5ad7ad71c 257 * @brief Display actual audio record sample rate on LCD
EricLew 0:d4e5ad7ad71c 258 * @param None
EricLew 0:d4e5ad7ad71c 259 * @retval None
EricLew 0:d4e5ad7ad71c 260 */
EricLew 0:d4e5ad7ad71c 261 static void SampleRateDisplay(uint8_t SampleRate)
EricLew 0:d4e5ad7ad71c 262 {
EricLew 0:d4e5ad7ad71c 263 /* Clear the LCD glass */
EricLew 0:d4e5ad7ad71c 264 BSP_LCD_GLASS_Clear();
EricLew 0:d4e5ad7ad71c 265
EricLew 0:d4e5ad7ad71c 266 /* Display actual audio record sample rate */
EricLew 0:d4e5ad7ad71c 267 switch (SamplesRates[SampleRate])
EricLew 0:d4e5ad7ad71c 268 {
EricLew 0:d4e5ad7ad71c 269 case BSP_AUDIO_FREQUENCY_48K:
EricLew 0:d4e5ad7ad71c 270 BSP_LCD_GLASS_DisplayString((uint8_t *)"48000");
EricLew 0:d4e5ad7ad71c 271 break;
EricLew 1:1ae4b642c533 272 }
EricLew 1:1ae4b642c533 273 }
EricLew 0:d4e5ad7ad71c 274 /**
EricLew 0:d4e5ad7ad71c 275 * @brief Audio record sample rate selection
EricLew 0:d4e5ad7ad71c 276 * @param None
EricLew 0:d4e5ad7ad71c 277 * @retval None
EricLew 0:d4e5ad7ad71c 278 */
EricLew 0:d4e5ad7ad71c 279 void SampleRateSelection(void)
EricLew 0:d4e5ad7ad71c 280 {
EricLew 0:d4e5ad7ad71c 281 /* Display actual audio record sample rate */
EricLew 0:d4e5ad7ad71c 282 SampleRateDisplay(SampleRateIndex);
EricLew 0:d4e5ad7ad71c 283
EricLew 0:d4e5ad7ad71c 284 /* Select audio record sample rate */
EricLew 0:d4e5ad7ad71c 285 while (!AudioRecordSampleRateSelected)
EricLew 0:d4e5ad7ad71c 286 {
EricLew 0:d4e5ad7ad71c 287 if (AudioRecordSampleRateChange != 0)
EricLew 0:d4e5ad7ad71c 288 {
EricLew 0:d4e5ad7ad71c 289 SampleRateDisplay(SampleRateIndex);
EricLew 0:d4e5ad7ad71c 290 HAL_Delay(5);
EricLew 0:d4e5ad7ad71c 291 AudioRecordSampleRateChange = 0;
EricLew 0:d4e5ad7ad71c 292 }
EricLew 0:d4e5ad7ad71c 293 }
EricLew 0:d4e5ad7ad71c 294
EricLew 0:d4e5ad7ad71c 295 AudioRecordSampleRateSelected = 0;
EricLew 0:d4e5ad7ad71c 296 }
EricLew 0:d4e5ad7ad71c 297
EricLew 0:d4e5ad7ad71c 298 /**
EricLew 0:d4e5ad7ad71c 299 * @brief Callback function invoked when half of the PCM samples have been
EricLew 0:d4e5ad7ad71c 300 * DM Atransfered from the DFSDM channel.
EricLew 0:d4e5ad7ad71c 301 * @param None
EricLew 0:d4e5ad7ad71c 302 * @retval None
EricLew 0:d4e5ad7ad71c 303 */
EricLew 0:d4e5ad7ad71c 304 void AudioRecord_TransferComplete_CallBack(void)
EricLew 0:d4e5ad7ad71c 305 {
EricLew 0:d4e5ad7ad71c 306 /* Toggle green LED */
EricLew 0:d4e5ad7ad71c 307 BSP_LED_Toggle(LED5);
EricLew 0:d4e5ad7ad71c 308
EricLew 0:d4e5ad7ad71c 309 RecordBufferOffset = BUFFER_OFFSET_FULL;
EricLew 0:d4e5ad7ad71c 310 }
EricLew 0:d4e5ad7ad71c 311
EricLew 0:d4e5ad7ad71c 312 /**
EricLew 0:d4e5ad7ad71c 313 * @brief Callback function invoked when all the PCM samples have been
EricLew 0:d4e5ad7ad71c 314 * DMA transfered from the DFSDM channel.
EricLew 0:d4e5ad7ad71c 315 * @param None
EricLew 0:d4e5ad7ad71c 316 * @retval None
EricLew 0:d4e5ad7ad71c 317 */
EricLew 0:d4e5ad7ad71c 318 void AudioRecord_HalfTransfer_CallBack(void)
EricLew 0:d4e5ad7ad71c 319 {
EricLew 0:d4e5ad7ad71c 320 RecordBufferOffset = BUFFER_OFFSET_HALF;
EricLew 0:d4e5ad7ad71c 321 }
EricLew 0:d4e5ad7ad71c 322
EricLew 0:d4e5ad7ad71c 323 /**
EricLew 0:d4e5ad7ad71c 324 * @brief Callback function invoked when an error occured durint he DMA
EricLew 0:d4e5ad7ad71c 325 * transfer of the PCM samples from the DFSDM channel.
EricLew 0:d4e5ad7ad71c 326 * @param None
EricLew 0:d4e5ad7ad71c 327 * @retval None
EricLew 0:d4e5ad7ad71c 328 */
EricLew 0:d4e5ad7ad71c 329 void AudioRecord_Error_CallBack(void)
EricLew 0:d4e5ad7ad71c 330 {
EricLew 0:d4e5ad7ad71c 331 /* Stop the program with an infinite loop */
EricLew 0:d4e5ad7ad71c 332 Error_Handler();
EricLew 0:d4e5ad7ad71c 333 }
EricLew 0:d4e5ad7ad71c 334 /**
EricLew 0:d4e5ad7ad71c 335 * @}
EricLew 0:d4e5ad7ad71c 336 */
EricLew 0:d4e5ad7ad71c 337
EricLew 0:d4e5ad7ad71c 338
EricLew 0:d4e5ad7ad71c 339 /**
EricLew 0:d4e5ad7ad71c 340 * @}
EricLew 0:d4e5ad7ad71c 341 */
EricLew 0:d4e5ad7ad71c 342 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
EricLew 0:d4e5ad7ad71c 343