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/* ... */
/* ... */
#include "stm32f411e_discovery_audio.h"
/* ... */
/* ... */
/* ... */
/* ... */
/* ... */
/* ... */
const uint32_t I2SFreq[8] = {8000, 11025, 16000, 22050, 32000, 44100, 48000, 96000};
const uint32_t I2SPLLN[8] = {256, 429, 213, 429, 426, 271, 258, 344};
const uint32_t I2SPLLR[8] = {5, 4, 4, 4, 4, 6, 3, 1};
/* ... */
/* ... */
/* ... */
/* ... */
static AUDIO_DrvTypeDef *pAudioDrv;
I2S_HandleTypeDef hAudioOutI2s;
I2S_HandleTypeDef hAudioInI2s;
PDM_Filter_Handler_t PDM_FilterHandler[2];
PDM_Filter_Config_t PDM_FilterConfig[2];
__IO uint16_t AudioInVolume = DEFAULT_AUDIO_IN_VOLUME;
/* ... */
/* ... */
static uint8_t I2S3_Init(uint32_t AudioFreq);
static uint8_t I2S2_Init(uint32_t AudioFreq);
static void PDMDecoder_Init(uint32_t AudioFreq, uint32_t ChnlNbrIn, uint32_t ChnlNbrOut);
/* ... */
/* ... */
/* ... */
uint8_t BSP_AUDIO_OUT_Init(uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq)
{
uint8_t ret = AUDIO_OK;
BSP_AUDIO_OUT_ClockConfig(&hAudioOutI2s, AudioFreq, NULL);
/* ... */
hAudioOutI2s.Instance = I2S3;
if(HAL_I2S_GetState(&hAudioOutI2s) == HAL_I2S_STATE_RESET)
{
BSP_AUDIO_OUT_MspInit(&hAudioOutI2s, NULL);
}if (HAL_I2S_GetState(&hAudioOutI2s) == HAL_I2S_STATE_RESET) { ... }
/* ... */
if(I2S3_Init(AudioFreq) != AUDIO_OK)
{
ret = AUDIO_ERROR;
}if (I2S3_Init(AudioFreq) != AUDIO_OK) { ... }
if(ret == AUDIO_OK)
{
if(((cs43l22_drv.ReadID(AUDIO_I2C_ADDRESS)) & CS43L22_ID_MASK) == CS43L22_ID)
{
pAudioDrv = &cs43l22_drv;
}if (((cs43l22_drv.ReadID(AUDIO_I2C_ADDRESS)) & CS43L22_ID_MASK) == CS43L22_ID) { ... }
else
{
ret = AUDIO_ERROR;
}else { ... }
}if (ret == AUDIO_OK) { ... }
if(ret == AUDIO_OK)
{
pAudioDrv->Init(AUDIO_I2C_ADDRESS, OutputDevice, Volume, AudioFreq);
}if (ret == AUDIO_OK) { ... }
return ret;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_Play(uint16_t* pBuffer, uint32_t Size)
{
if(pAudioDrv->Play(AUDIO_I2C_ADDRESS, pBuffer, Size) != 0)
{
return AUDIO_ERROR;
}if (pAudioDrv->Play(AUDIO_I2C_ADDRESS, pBuffer, Size) != 0) { ... }
else
{
HAL_I2S_Transmit_DMA(&hAudioOutI2s, pBuffer, DMA_MAX(Size/AUDIODATA_SIZE));
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
void BSP_AUDIO_OUT_ChangeBuffer(uint16_t *pData, uint16_t Size)
{
HAL_I2S_Transmit_DMA(&hAudioOutI2s, pData, Size);
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_Pause(void)
{
if(pAudioDrv->Pause(AUDIO_I2C_ADDRESS) != 0)
{
return AUDIO_ERROR;
}if (pAudioDrv->Pause(AUDIO_I2C_ADDRESS) != 0) { ... }
else
{
HAL_I2S_DMAPause(&hAudioOutI2s);
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_Resume(void)
{
if(pAudioDrv->Resume(AUDIO_I2C_ADDRESS) != 0)
{
return AUDIO_ERROR;
}if (pAudioDrv->Resume(AUDIO_I2C_ADDRESS) != 0) { ... }
else
{
HAL_I2S_DMAResume(&hAudioOutI2s);
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_Stop(uint32_t Option)
{
HAL_I2S_DMAStop(&hAudioOutI2s);
if(pAudioDrv->Stop(AUDIO_I2C_ADDRESS, Option) != 0)
{
return AUDIO_ERROR;
}if (pAudioDrv->Stop(AUDIO_I2C_ADDRESS, Option) != 0) { ... }
else
{
if(Option == CODEC_PDWN_HW)
{
HAL_Delay(1);
HAL_GPIO_WritePin(AUDIO_RESET_GPIO, AUDIO_RESET_PIN, GPIO_PIN_RESET);
}if (Option == CODEC_PDWN_HW) { ... }
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_SetVolume(uint8_t Volume)
{
if(pAudioDrv->SetVolume(AUDIO_I2C_ADDRESS, Volume) != 0)
{
return AUDIO_ERROR;
}if (pAudioDrv->SetVolume(AUDIO_I2C_ADDRESS, Volume) != 0) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_SetMute(uint32_t Cmd)
{
if(pAudioDrv->SetMute(AUDIO_I2C_ADDRESS, Cmd) != 0)
{
return AUDIO_ERROR;
}if (pAudioDrv->SetMute(AUDIO_I2C_ADDRESS, Cmd) != 0) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_SetOutputMode(uint8_t Output)
{
if(pAudioDrv->SetOutputMode(AUDIO_I2C_ADDRESS, Output) != 0)
{
return AUDIO_ERROR;
}if (pAudioDrv->SetOutputMode(AUDIO_I2C_ADDRESS, Output) != 0) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
void BSP_AUDIO_OUT_SetFrequency(uint32_t AudioFreq)
{
RCC_PeriphCLKInitTypeDef rccclkinit;
HAL_RCCEx_GetPeriphCLKConfig(&rccclkinit);
if ((AudioFreq & 0x7) == 0)
{
rccclkinit.PeriphClockSelection = RCC_PERIPHCLK_I2S;
rccclkinit.PLLI2S.PLLI2SN = 192;
rccclkinit.PLLI2S.PLLI2SR = 6;
HAL_RCCEx_PeriphCLKConfig(&rccclkinit);
}if ((AudioFreq & 0x7) == 0) { ... }
else
{
rccclkinit.PeriphClockSelection = RCC_PERIPHCLK_I2S;
rccclkinit.PLLI2S.PLLI2SN = 290;
rccclkinit.PLLI2S.PLLI2SR = 2;
HAL_RCCEx_PeriphCLKConfig(&rccclkinit);
}else { ... }
I2S3_Init(AudioFreq);
}{ ... }
/* ... */
void HAL_I2S_TxCpltCallback(I2S_HandleTypeDef *hi2s)
{
if(hi2s->Instance == I2S3)
{
BSP_AUDIO_OUT_TransferComplete_CallBack();
}if (hi2s->Instance == I2S3) { ... }
}{ ... }
/* ... */
void HAL_I2S_TxHalfCpltCallback(I2S_HandleTypeDef *hi2s)
{
if(hi2s->Instance == I2S3)
{
/* ... */
BSP_AUDIO_OUT_HalfTransfer_CallBack();
}if (hi2s->Instance == I2S3) { ... }
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_ClockConfig(I2S_HandleTypeDef *hi2s, uint32_t AudioFreq, void *Params)
{
RCC_PeriphCLKInitTypeDef rccclkinit;
uint8_t index = 0, freqindex = 0xFF;
for(index = 0; index < 8; index++)
{
if(I2SFreq[index] == AudioFreq)
{
freqindex = index;
}if (I2SFreq[index] == AudioFreq) { ... }
}for (index = 0; index < 8; index++) { ... }
HAL_RCCEx_GetPeriphCLKConfig(&rccclkinit);
if ((freqindex & 0x7) == 0)
{
/* ... */
rccclkinit.PeriphClockSelection = RCC_PERIPHCLK_I2S;
rccclkinit.PLLI2S.PLLI2SM = 8;
rccclkinit.PLLI2S.PLLI2SN = I2SPLLN[freqindex];
rccclkinit.PLLI2S.PLLI2SR = I2SPLLR[freqindex];
HAL_RCCEx_PeriphCLKConfig(&rccclkinit);
}if ((freqindex & 0x7) == 0) { ... }
else
{
/* ... */
rccclkinit.PeriphClockSelection = RCC_PERIPHCLK_I2S;
rccclkinit.PLLI2S.PLLI2SM = 8;
rccclkinit.PLLI2S.PLLI2SN = 258;
rccclkinit.PLLI2S.PLLI2SR = 3;
HAL_RCCEx_PeriphCLKConfig(&rccclkinit);
}else { ... }
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_MspInit(I2S_HandleTypeDef *hi2s, void *Params)
{
static DMA_HandleTypeDef hdma_i2sTx;
GPIO_InitTypeDef GPIO_InitStruct;
I2S3_CLK_ENABLE();
I2S3_SCK_SD_CLK_ENABLE();
I2S3_WS_CLK_ENABLE();
GPIO_InitStruct.Pin = I2S3_SCK_PIN | I2S3_SD_PIN;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Alternate = I2S3_SCK_SD_WS_AF;
HAL_GPIO_Init(I2S3_SCK_SD_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = I2S3_WS_PIN ;
HAL_GPIO_Init(I2S3_WS_GPIO_PORT, &GPIO_InitStruct);
I2S3_MCK_CLK_ENABLE();
GPIO_InitStruct.Pin = I2S3_MCK_PIN;
HAL_GPIO_Init(I2S3_MCK_GPIO_PORT, &GPIO_InitStruct);
I2S3_DMAx_CLK_ENABLE();
if(hi2s->Instance == I2S3)
{
hdma_i2sTx.Init.Channel = I2S3_DMAx_CHANNEL;
hdma_i2sTx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_i2sTx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_i2sTx.Init.MemInc = DMA_MINC_ENABLE;
hdma_i2sTx.Init.PeriphDataAlignment = I2S3_DMAx_PERIPH_DATA_SIZE;
hdma_i2sTx.Init.MemDataAlignment = I2S3_DMAx_MEM_DATA_SIZE;
hdma_i2sTx.Init.Mode = DMA_NORMAL;
hdma_i2sTx.Init.Priority = DMA_PRIORITY_HIGH;
hdma_i2sTx.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
hdma_i2sTx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_i2sTx.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_i2sTx.Init.PeriphBurst = DMA_PBURST_SINGLE;
hdma_i2sTx.Instance = I2S3_DMAx_STREAM;
__HAL_LINKDMA(hi2s, hdmatx, hdma_i2sTx);
HAL_DMA_DeInit(&hdma_i2sTx);
HAL_DMA_Init(&hdma_i2sTx);
}if (hi2s->Instance == I2S3) { ... }
HAL_NVIC_SetPriority(I2S3_DMAx_IRQ, AUDIO_OUT_IRQ_PREPRIO, 0);
HAL_NVIC_EnableIRQ(I2S3_DMAx_IRQ);
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_MspDeInit(I2S_HandleTypeDef *hi2s, void *Params)
{
GPIO_InitTypeDef GPIO_InitStruct;
HAL_NVIC_DisableIRQ(I2S3_DMAx_IRQ);
if(hi2s->Instance == I2S3)
{
HAL_DMA_DeInit(hi2s->hdmatx);
}if (hi2s->Instance == I2S3) { ... }
__HAL_I2S_DISABLE(hi2s);
GPIO_InitStruct.Pin = I2S3_SCK_PIN | I2S3_SD_PIN;
HAL_GPIO_DeInit(I2S3_SCK_SD_GPIO_PORT, GPIO_InitStruct.Pin);
GPIO_InitStruct.Pin = I2S3_WS_PIN;
HAL_GPIO_DeInit(I2S3_WS_GPIO_PORT, GPIO_InitStruct.Pin);
GPIO_InitStruct.Pin = I2S3_MCK_PIN;
HAL_GPIO_DeInit(I2S3_MCK_GPIO_PORT, GPIO_InitStruct.Pin);
I2S3_CLK_DISABLE();
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_TransferComplete_CallBack(void)
{
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_HalfTransfer_CallBack(void)
{
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_Error_CallBack(void)
{
}{ ... }
/* ... */
/* ... */
static uint8_t I2S3_Init(uint32_t AudioFreq)
{
hAudioOutI2s.Instance = I2S3;
__HAL_I2S_DISABLE(&hAudioOutI2s);
hAudioOutI2s.Init.AudioFreq = AudioFreq;
hAudioOutI2s.Init.ClockSource = I2S_CLOCK_PLL;
hAudioOutI2s.Init.CPOL = I2S_CPOL_LOW;
hAudioOutI2s.Init.DataFormat = I2S_DATAFORMAT_16B;
hAudioOutI2s.Init.MCLKOutput = I2S_MCLKOUTPUT_ENABLE;
hAudioOutI2s.Init.Mode = I2S_MODE_MASTER_TX;
hAudioOutI2s.Init.Standard = I2S_STANDARD;
if(HAL_I2S_Init(&hAudioOutI2s) != HAL_OK)
{
return AUDIO_ERROR;
}if (HAL_I2S_Init(&hAudioOutI2s) != HAL_OK) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
/* ... */
/* ... */
uint8_t BSP_AUDIO_IN_Init(uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
{
BSP_AUDIO_IN_ClockConfig(&hAudioInI2s, AudioFreq, NULL);
/* ... */
PDMDecoder_Init(AudioFreq, ChnlNbr, 2);
hAudioInI2s.Instance = I2S2;
if(HAL_I2S_GetState(&hAudioInI2s) == HAL_I2S_STATE_RESET)
{
BSP_AUDIO_IN_MspInit(&hAudioInI2s, NULL);
}if (HAL_I2S_GetState(&hAudioInI2s) == HAL_I2S_STATE_RESET) { ... }
I2S2_Init(AudioFreq);
return AUDIO_OK;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_Record(uint16_t* pbuf, uint32_t size)
{
uint32_t ret = AUDIO_ERROR;
HAL_I2S_Receive_DMA(&hAudioInI2s, pbuf, size);
ret = AUDIO_OK;
return ret;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_Stop(void)
{
uint32_t ret = AUDIO_ERROR;
HAL_I2S_DMAStop(&hAudioInI2s);
ret = AUDIO_OK;
return ret;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_Pause(void)
{
HAL_I2S_DMAPause(&hAudioInI2s);
return AUDIO_OK;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_Resume(void)
{
HAL_I2S_DMAResume(&hAudioInI2s);
return AUDIO_OK;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_SetVolume(uint8_t Volume)
{
AudioInVolume = Volume;
return AUDIO_OK;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_PDMToPCM(uint16_t *PDMBuf, uint16_t *PCMBuf)
{
uint16_t AppPDM[INTERNAL_BUFF_SIZE/2];
uint32_t index = 0;
for(index = 0; index<INTERNAL_BUFF_SIZE/2; index++)
{
AppPDM[index] = HTONS(PDMBuf[index]);
}for (index = 0; index
for(index = 0; index < DEFAULT_AUDIO_IN_CHANNEL_NBR; index++)
{
PDM_Filter((uint8_t*)&AppPDM[index], (uint16_t*)&(PCMBuf[index]), &PDM_FilterHandler[index]);
}for (index = 0; index < DEFAULT_AUDIO_IN_CHANNEL_NBR; index++) { ... }
for(index = 0; index < PCM_OUT_SIZE; index++)
{
PCMBuf[(index<<1)+1] = PCMBuf[index<<1];
}for (index = 0; index < PCM_OUT_SIZE; index++) { ... }
return AUDIO_OK;
}{ ... }
/* ... */
void HAL_I2S_RxCpltCallback(I2S_HandleTypeDef *hi2s)
{
BSP_AUDIO_IN_TransferComplete_CallBack();
}{ ... }
/* ... */
void HAL_I2S_RxHalfCpltCallback(I2S_HandleTypeDef *hi2s)
{
/* ... */
BSP_AUDIO_IN_HalfTransfer_CallBack();
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_ClockConfig(I2S_HandleTypeDef *hi2s, uint32_t AudioFreq, void *Params)
{
RCC_PeriphCLKInitTypeDef rccclkinit;
HAL_RCCEx_GetPeriphCLKConfig(&rccclkinit);
if ((AudioFreq & 0x7) == 0)
{
rccclkinit.PeriphClockSelection = RCC_PERIPHCLK_I2S;
rccclkinit.PLLI2S.PLLI2SM = 8;
rccclkinit.PLLI2S.PLLI2SN = 192;
rccclkinit.PLLI2S.PLLI2SR = 6;
HAL_RCCEx_PeriphCLKConfig(&rccclkinit);
}if ((AudioFreq & 0x7) == 0) { ... }
else
{
rccclkinit.PeriphClockSelection = RCC_PERIPHCLK_I2S;
rccclkinit.PLLI2S.PLLI2SM = 8;
rccclkinit.PLLI2S.PLLI2SN = 290;
rccclkinit.PLLI2S.PLLI2SR = 2;
HAL_RCCEx_PeriphCLKConfig(&rccclkinit);
}else { ... }
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_MspInit(I2S_HandleTypeDef *hi2s, void *Params)
{
static DMA_HandleTypeDef hdma_i2sRx;
GPIO_InitTypeDef GPIO_InitStruct;
I2S2_CLK_ENABLE();
I2S2_SCK_GPIO_CLK_ENABLE();
I2S2_MOSI_GPIO_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Pin = I2S2_SCK_PIN;
GPIO_InitStruct.Alternate = I2S2_SCK_AF;
HAL_GPIO_Init(I2S2_SCK_GPIO_PORT, &GPIO_InitStruct);
GPIO_InitStruct.Pin = I2S2_MOSI_PIN ;
GPIO_InitStruct.Alternate = I2S2_MOSI_AF;
HAL_GPIO_Init(I2S2_MOSI_GPIO_PORT, &GPIO_InitStruct);
I2S2_DMAx_CLK_ENABLE();
if(hi2s->Instance == I2S2)
{
hdma_i2sRx.Init.Channel = I2S2_DMAx_CHANNEL;
hdma_i2sRx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_i2sRx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_i2sRx.Init.MemInc = DMA_MINC_ENABLE;
hdma_i2sRx.Init.PeriphDataAlignment = I2S2_DMAx_PERIPH_DATA_SIZE;
hdma_i2sRx.Init.MemDataAlignment = I2S2_DMAx_MEM_DATA_SIZE;
hdma_i2sRx.Init.Mode = DMA_CIRCULAR;
hdma_i2sRx.Init.Priority = DMA_PRIORITY_HIGH;
hdma_i2sRx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
hdma_i2sRx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_i2sRx.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_i2sRx.Init.PeriphBurst = DMA_MBURST_SINGLE;
hdma_i2sRx.Instance = I2S2_DMAx_STREAM;
__HAL_LINKDMA(hi2s, hdmarx, hdma_i2sRx);
HAL_DMA_DeInit(&hdma_i2sRx);
HAL_DMA_Init(&hdma_i2sRx);
}if (hi2s->Instance == I2S2) { ... }
HAL_NVIC_SetPriority(I2S2_DMAx_IRQ, AUDIO_IN_IRQ_PREPRIO, 0);
HAL_NVIC_EnableIRQ(I2S2_DMAx_IRQ);
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_MspDeInit(I2S_HandleTypeDef *hi2s, void *Params)
{
GPIO_InitTypeDef gpio_init_structure;
HAL_NVIC_DisableIRQ(I2S2_DMAx_IRQ);
if(hi2s->Instance == I2S2)
{
HAL_DMA_DeInit(hi2s->hdmarx);
}if (hi2s->Instance == I2S2) { ... }
__HAL_I2S_DISABLE(hi2s);
gpio_init_structure.Pin = I2S2_SCK_PIN;
HAL_GPIO_DeInit(I2S2_SCK_GPIO_PORT, gpio_init_structure.Pin);
gpio_init_structure.Pin = I2S2_MOSI_PIN;
HAL_GPIO_DeInit(I2S2_MOSI_GPIO_PORT, gpio_init_structure.Pin);
I2S2_CLK_DISABLE();
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_TransferComplete_CallBack(void)
{
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
{
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_Error_Callback(void)
{
/* ... */
}{ ... }
/* ... */
/* ... */
static void PDMDecoder_Init(uint32_t AudioFreq, uint32_t ChnlNbrIn, uint32_t ChnlNbrOut)
{
uint32_t index = 0;
__HAL_RCC_CRC_CLK_ENABLE();
for(index = 0; index < ChnlNbrIn; index++)
{
PDM_FilterHandler[index].bit_order = PDM_FILTER_BIT_ORDER_LSB;
PDM_FilterHandler[index].endianness = PDM_FILTER_ENDIANNESS_LE;
PDM_FilterHandler[index].high_pass_tap = 2122358088;
PDM_FilterHandler[index].out_ptr_channels = ChnlNbrOut;
PDM_FilterHandler[index].in_ptr_channels = ChnlNbrIn;
PDM_Filter_Init((PDM_Filter_Handler_t *)(&PDM_FilterHandler[index]));
PDM_FilterConfig[index].output_samples_number = AudioFreq/1000;
PDM_FilterConfig[index].mic_gain = 24;
PDM_FilterConfig[index].decimation_factor = PDM_FILTER_DEC_FACTOR_64;
PDM_Filter_setConfig((PDM_Filter_Handler_t *)&PDM_FilterHandler[index], &PDM_FilterConfig[index]);
}for (index = 0; index < ChnlNbrIn; index++) { ... }
}{ ... }
/* ... */
static uint8_t I2S2_Init(uint32_t AudioFreq)
{
hAudioInI2s.Instance = I2S2;
__HAL_I2S_DISABLE(&hAudioInI2s);
hAudioInI2s.Init.AudioFreq = 2 * AudioFreq;
hAudioInI2s.Init.ClockSource = I2S_CLOCK_PLL;
hAudioInI2s.Init.CPOL = I2S_CPOL_HIGH;
hAudioInI2s.Init.DataFormat = I2S_DATAFORMAT_16B;
hAudioInI2s.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
hAudioInI2s.Init.Mode = I2S_MODE_MASTER_RX;
hAudioInI2s.Init.Standard = I2S_STANDARD_LSB;
if(HAL_I2S_Init(&hAudioInI2s) != HAL_OK)
{
return AUDIO_ERROR;
}if (HAL_I2S_Init(&hAudioInI2s) != HAL_OK) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
/* ... */
/* ... */
void HAL_I2S_ErrorCallback(I2S_HandleTypeDef *hi2s)
{
/* ... */
if(hi2s->Instance == I2S3)
{
BSP_AUDIO_OUT_Error_CallBack();
}if (hi2s->Instance == I2S3) { ... }
if(hi2s->Instance == I2S2)
{
BSP_AUDIO_IN_Error_Callback();
}if (hi2s->Instance == I2S2) { ... }
}{ ... }
/* ... */
/* ... */
/* ... */
/* ... */