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/* ... */
/* ... */
#include "stm32469i_eval_audio.h"
/* ... */
/* ... */
/* ... */
/* ... */
/* ... */
/* ... */
#define OUTPUT_DEVICE_HEADPHONE1 OUTPUT_DEVICE_HEADPHONE
#define OUTPUT_DEVICE_HEADPHONE2 OUTPUT_DEVICE_SPEAKER
/* ... */
/* ... */
/* ... */
/* ... */
/* ... */
AUDIO_DrvTypeDef *audio_drv;
SAI_HandleTypeDef haudio_out_sai;
I2S_HandleTypeDef haudio_in_i2s;
TIM_HandleTypeDef haudio_tim;
PDM_Filter_Handler_t PDM_FilterHandler[2];
PDM_Filter_Config_t PDM_FilterConfig[2];
uint8_t Channel_Demux[128] = {
0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03,
0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03,
0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07,
0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07,
0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03,
0x00, 0x01, 0x00, 0x01, 0x02, 0x03, 0x02, 0x03,
0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07,
0x04, 0x05, 0x04, 0x05, 0x06, 0x07, 0x06, 0x07,
0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b,
0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b,
0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f,
0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f,
0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b,
0x08, 0x09, 0x08, 0x09, 0x0a, 0x0b, 0x0a, 0x0b,
0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f,
0x0c, 0x0d, 0x0c, 0x0d, 0x0e, 0x0f, 0x0e, 0x0f
...};
uint16_t __IO AudioInVolume = DEFAULT_AUDIO_IN_VOLUME;
/* ... */
/* ... */
static void SAIx_Init(uint32_t AudioFreq);
static void SAIx_DeInit(void);
static void I2Sx_Init(uint32_t AudioFreq);
static void I2Sx_DeInit(void);
static void TIMx_IC_MspInit(TIM_HandleTypeDef *htim);
static void TIMx_IC_MspDeInit(TIM_HandleTypeDef *htim);
static void TIMx_Init(void);
static void TIMx_DeInit(void);
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_ERROR;
uint32_t deviceid = 0x00;
SAIx_DeInit();
BSP_AUDIO_OUT_ClockConfig(&haudio_out_sai, AudioFreq, NULL);
/* ... */
haudio_out_sai.Instance = AUDIO_SAIx;
if(HAL_SAI_GetState(&haudio_out_sai) == HAL_SAI_STATE_RESET)
{
BSP_AUDIO_OUT_MspInit(&haudio_out_sai, NULL);
}if (HAL_SAI_GetState(&haudio_out_sai) == HAL_SAI_STATE_RESET) { ... }
SAIx_Init(AudioFreq);
deviceid = wm8994_drv.ReadID(AUDIO_I2C_ADDRESS);
if((deviceid) == WM8994_ID)
{
audio_drv = &wm8994_drv;
ret = AUDIO_OK;
}if ((deviceid) == WM8994_ID) { ... }
else
{
ret = AUDIO_ERROR;
}else { ... }
if(ret == AUDIO_OK)
{
audio_drv->Reset(AUDIO_I2C_ADDRESS);
audio_drv->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(audio_drv->Play(AUDIO_I2C_ADDRESS, pBuffer, Size) != 0)
{
return AUDIO_ERROR;
}if (audio_drv->Play(AUDIO_I2C_ADDRESS, pBuffer, Size) != 0) { ... }
else
{
HAL_SAI_Transmit_DMA(&haudio_out_sai, (uint8_t*) pBuffer, DMA_MAX(Size / AUDIODATA_SIZE));
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
void BSP_AUDIO_OUT_ChangeBuffer(uint16_t *pData, uint16_t Size)
{
HAL_SAI_Transmit_DMA(&haudio_out_sai, (uint8_t*) pData, Size);
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_Pause(void)
{
if(audio_drv->Pause(AUDIO_I2C_ADDRESS) != 0)
{
return AUDIO_ERROR;
}if (audio_drv->Pause(AUDIO_I2C_ADDRESS) != 0) { ... }
else
{
HAL_SAI_DMAPause(&haudio_out_sai);
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_Resume(void)
{
if(audio_drv->Resume(AUDIO_I2C_ADDRESS) != 0)
{
return AUDIO_ERROR;
}if (audio_drv->Resume(AUDIO_I2C_ADDRESS) != 0) { ... }
else
{
HAL_SAI_DMAResume(&haudio_out_sai);
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_Stop(uint32_t Option)
{
HAL_SAI_DMAStop(&haudio_out_sai);
if(audio_drv->Stop(AUDIO_I2C_ADDRESS, Option) != 0)
{
return AUDIO_ERROR;
}if (audio_drv->Stop(AUDIO_I2C_ADDRESS, Option) != 0) { ... }
else
{
if(Option == CODEC_PDWN_HW)
{
HAL_Delay(1);
}if (Option == CODEC_PDWN_HW) { ... }
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_SetVolume(uint8_t Volume)
{
if(audio_drv->SetVolume(AUDIO_I2C_ADDRESS, Volume) != 0)
{
return AUDIO_ERROR;
}if (audio_drv->SetVolume(AUDIO_I2C_ADDRESS, Volume) != 0) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_SetMute(uint32_t Cmd)
{
if(audio_drv->SetMute(AUDIO_I2C_ADDRESS, Cmd) != 0)
{
return AUDIO_ERROR;
}if (audio_drv->SetMute(AUDIO_I2C_ADDRESS, Cmd) != 0) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
uint8_t BSP_AUDIO_OUT_SetOutputMode(uint8_t Output)
{
if(audio_drv->SetOutputMode(AUDIO_I2C_ADDRESS, Output) != 0)
{
return AUDIO_ERROR;
}if (audio_drv->SetOutputMode(AUDIO_I2C_ADDRESS, Output) != 0) { ... }
else
{
return AUDIO_OK;
}else { ... }
}{ ... }
/* ... */
void BSP_AUDIO_OUT_SetFrequency(uint32_t AudioFreq)
{
BSP_AUDIO_OUT_ClockConfig(&haudio_out_sai, AudioFreq, NULL);
__HAL_SAI_DISABLE(&haudio_out_sai);
haudio_out_sai.Init.AudioFrequency = AudioFreq;
HAL_SAI_Init(&haudio_out_sai);
__HAL_SAI_ENABLE(&haudio_out_sai);
}{ ... }
/* ... */
void BSP_AUDIO_OUT_SetAudioFrameSlot(uint32_t AudioFrameSlot)
{
__HAL_SAI_DISABLE(&haudio_out_sai);
haudio_out_sai.SlotInit.SlotActive = AudioFrameSlot;
HAL_SAI_Init(&haudio_out_sai);
__HAL_SAI_ENABLE(&haudio_out_sai);
}{ ... }
/* ... */
void BSP_AUDIO_OUT_DeInit(void)
{
SAIx_DeInit();
BSP_AUDIO_OUT_MspDeInit(&haudio_out_sai, NULL);
}{ ... }
/* ... */
void HAL_SAI_TxCpltCallback(SAI_HandleTypeDef *hsai)
{
/* ... */
BSP_AUDIO_OUT_TransferComplete_CallBack();
}{ ... }
/* ... */
void HAL_SAI_TxHalfCpltCallback(SAI_HandleTypeDef *hsai)
{
/* ... */
BSP_AUDIO_OUT_HalfTransfer_CallBack();
}{ ... }
/* ... */
void HAL_SAI_ErrorCallback(SAI_HandleTypeDef *hsai)
{
BSP_AUDIO_OUT_Error_CallBack();
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_TransferComplete_CallBack(void)
{
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_HalfTransfer_CallBack(void)
{
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_Error_CallBack(void)
{
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_MspInit(SAI_HandleTypeDef *hsai, void *Params)
{
static DMA_HandleTypeDef hdma_sai_tx;
GPIO_InitTypeDef gpio_init_structure;
AUDIO_SAIx_CLK_ENABLE();
AUDIO_SAIx_MCLK_ENABLE();
AUDIO_SAIx_SCK_SD_FS_ENABLE();
gpio_init_structure.Pin = AUDIO_SAIx_MCK_PIN;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Pull = GPIO_NOPULL;
gpio_init_structure.Speed = GPIO_SPEED_HIGH;
gpio_init_structure.Alternate = AUDIO_SAIx_MCLK_SCK_SD_FS_AF;
HAL_GPIO_Init(AUDIO_SAIx_MCLK_GPIO_PORT, &gpio_init_structure);
CODEC_SAI pins configuration: MCK pin
gpio_init_structure.Pin = AUDIO_SAIx_FS_PIN | AUDIO_SAIx_SCK_PIN | AUDIO_SAIx_SD_PIN;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Pull = GPIO_NOPULL;
gpio_init_structure.Speed = GPIO_SPEED_HIGH;
gpio_init_structure.Alternate = AUDIO_SAIx_MCLK_SCK_SD_FS_AF;
HAL_GPIO_Init(AUDIO_SAIx_SCK_SD_FS_GPIO_PORT, &gpio_init_structure);
AUDIO_SAIx_DMAx_CLK_ENABLE();
if(hsai->Instance == AUDIO_SAIx)
{
hdma_sai_tx.Init.Channel = AUDIO_SAIx_DMAx_CHANNEL;
hdma_sai_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
hdma_sai_tx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_sai_tx.Init.MemInc = DMA_MINC_ENABLE;
hdma_sai_tx.Init.PeriphDataAlignment = AUDIO_SAIx_DMAx_PERIPH_DATA_SIZE;
hdma_sai_tx.Init.MemDataAlignment = AUDIO_SAIx_DMAx_MEM_DATA_SIZE;
hdma_sai_tx.Init.Mode = DMA_CIRCULAR;
hdma_sai_tx.Init.Priority = DMA_PRIORITY_HIGH;
hdma_sai_tx.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
hdma_sai_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_sai_tx.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_sai_tx.Init.PeriphBurst = DMA_PBURST_SINGLE;
hdma_sai_tx.Instance = AUDIO_SAIx_DMAx_STREAM;
__HAL_LINKDMA(hsai, hdmatx, hdma_sai_tx);
HAL_DMA_DeInit(&hdma_sai_tx);
HAL_DMA_Init(&hdma_sai_tx);
}if (hsai->Instance == AUDIO_SAIx) { ... }
HAL_NVIC_SetPriority(AUDIO_SAIx_DMAx_IRQ, AUDIO_OUT_IRQ_PREPRIO, 0);
HAL_NVIC_EnableIRQ(AUDIO_SAIx_DMAx_IRQ);
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_MspDeInit(SAI_HandleTypeDef *hsai, void *Params)
{
GPIO_InitTypeDef gpio_init_structure;
HAL_NVIC_DisableIRQ(AUDIO_SAIx_DMAx_IRQ);
if(hsai->Instance == AUDIO_SAIx)
{
HAL_DMA_DeInit(hsai->hdmatx);
}if (hsai->Instance == AUDIO_SAIx) { ... }
__HAL_SAI_DISABLE(hsai);
gpio_init_structure.Pin = AUDIO_SAIx_MCK_PIN;
HAL_GPIO_DeInit(AUDIO_SAIx_MCLK_GPIO_PORT, gpio_init_structure.Pin);
gpio_init_structure.Pin = AUDIO_SAIx_FS_PIN | AUDIO_SAIx_SCK_PIN | AUDIO_SAIx_SD_PIN;
HAL_GPIO_DeInit(AUDIO_SAIx_SCK_SD_FS_GPIO_PORT, gpio_init_structure.Pin);
AUDIO_SAIx_CLK_DISABLE();
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_OUT_ClockConfig(SAI_HandleTypeDef *hsai, uint32_t AudioFreq, void *Params)
{
RCC_PeriphCLKInitTypeDef rcc_ex_clk_init_struct;
HAL_RCCEx_GetPeriphCLKConfig(&rcc_ex_clk_init_struct);
if((AudioFreq == AUDIO_FREQUENCY_11K) || (AudioFreq == AUDIO_FREQUENCY_22K) || (AudioFreq == AUDIO_FREQUENCY_44K))
{
/* ... */
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_SAI_PLLI2S;
rcc_ex_clk_init_struct.PLLI2S.PLLI2SN = 429;
rcc_ex_clk_init_struct.PLLI2S.PLLI2SQ = 2;
rcc_ex_clk_init_struct.PLLI2SDivQ = 19;
HAL_RCCEx_PeriphCLKConfig(&rcc_ex_clk_init_struct);
}if ((AudioFreq == AUDIO_FREQUENCY_11K) || (AudioFreq == AUDIO_FREQUENCY_22K) || (AudioFreq == AUDIO_FREQUENCY_44K)) { ... }
else
{
/* ... */
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_SAI_PLLI2S;
rcc_ex_clk_init_struct.PLLI2S.PLLI2SN = 344;
rcc_ex_clk_init_struct.PLLI2S.PLLI2SQ = 7;
rcc_ex_clk_init_struct.PLLI2SDivQ = 1;
HAL_RCCEx_PeriphCLKConfig(&rcc_ex_clk_init_struct);
}else { ... }
}{ ... }
/* ... */
/* ... */
static void SAIx_Init(uint32_t AudioFreq)
{
haudio_out_sai.Instance = AUDIO_SAIx;
__HAL_SAI_DISABLE(&haudio_out_sai);
/* ... */
haudio_out_sai.Init.AudioFrequency = AudioFreq;
haudio_out_sai.Init.ClockSource = SAI_CLKSOURCE_PLLI2S;
haudio_out_sai.Init.AudioMode = SAI_MODEMASTER_TX;
haudio_out_sai.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
haudio_out_sai.Init.Protocol = SAI_FREE_PROTOCOL;
haudio_out_sai.Init.DataSize = SAI_DATASIZE_16;
haudio_out_sai.Init.FirstBit = SAI_FIRSTBIT_MSB;
haudio_out_sai.Init.ClockStrobing = SAI_CLOCKSTROBING_FALLINGEDGE;
haudio_out_sai.Init.Synchro = SAI_ASYNCHRONOUS;
haudio_out_sai.Init.OutputDrive = SAI_OUTPUTDRIVE_ENABLE;
haudio_out_sai.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF;
/* ... */
haudio_out_sai.FrameInit.FrameLength = 64;
haudio_out_sai.FrameInit.ActiveFrameLength = 32;
haudio_out_sai.FrameInit.FSDefinition = SAI_FS_CHANNEL_IDENTIFICATION;
haudio_out_sai.FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
haudio_out_sai.FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT;
/* ... */
haudio_out_sai.SlotInit.FirstBitOffset = 0;
haudio_out_sai.SlotInit.SlotSize = SAI_SLOTSIZE_DATASIZE;
haudio_out_sai.SlotInit.SlotNumber = 4;
haudio_out_sai.SlotInit.SlotActive = CODEC_AUDIOFRAME_SLOT_0123;
HAL_SAI_Init(&haudio_out_sai);
__HAL_SAI_ENABLE(&haudio_out_sai);
}{ ... }
/* ... */
static void SAIx_DeInit(void)
{
haudio_out_sai.Instance = AUDIO_SAIx;
__HAL_SAI_DISABLE(&haudio_out_sai);
HAL_SAI_DeInit(&haudio_out_sai);
}{ ... }
/* ... */
/* ... */
/* ... */
uint8_t BSP_AUDIO_IN_Init(uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
{
RCC_PeriphCLKInitTypeDef rcc_ex_clk_init_struct;
I2Sx_DeInit();
HAL_RCCEx_GetPeriphCLKConfig(&rcc_ex_clk_init_struct);
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_I2S;
rcc_ex_clk_init_struct.PLLI2S.PLLI2SN = 384;
rcc_ex_clk_init_struct.PLLI2S.PLLI2SR = 2;
HAL_RCCEx_PeriphCLKConfig(&rcc_ex_clk_init_struct);
PDMDecoder_Init(AudioFreq, ChnlNbr, ChnlNbr);
haudio_in_i2s.Instance = AUDIO_I2Sx;
if(HAL_I2S_GetState(&haudio_in_i2s) == HAL_I2S_STATE_RESET)
{
BSP_AUDIO_IN_MspInit(&haudio_in_i2s, NULL);
}if (HAL_I2S_GetState(&haudio_in_i2s) == HAL_I2S_STATE_RESET) { ... }
I2Sx_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(&haudio_in_i2s, pbuf, size);
ret = AUDIO_OK;
return ret;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_Stop(void)
{
uint32_t ret = AUDIO_ERROR;
HAL_I2S_DMAPause(&haudio_in_i2s);
AUDIO_TIMx_CLK_DISABLE();
ret = AUDIO_OK;
return ret;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_Pause(void)
{
HAL_I2S_DMAPause(&haudio_in_i2s);
return AUDIO_OK;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_Resume(void)
{
HAL_I2S_DMAResume(&haudio_in_i2s);
return AUDIO_OK;
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_SetVolume(uint8_t Volume)
{
AudioInVolume = Volume;
return AUDIO_OK;
}{ ... }
/* ... */
void BSP_AUDIO_IN_DeInit(void)
{
I2Sx_DeInit();
BSP_AUDIO_IN_MspDeInit(&haudio_in_i2s, NULL);
TIMx_DeInit();
}{ ... }
/* ... */
uint8_t BSP_AUDIO_IN_PDMToPCM(uint16_t* PDMBuf, uint16_t* PCMBuf)
{
uint8_t app_pdm[INTERNAL_BUFF_SIZE*2];
uint8_t byte1 = 0, byte2 = 0;
uint32_t index = 0;
for(index = 0; index<INTERNAL_BUFF_SIZE/2; index++)
{
byte2 = (PDMBuf[index] >> 8)& 0xFF;
byte1 = (PDMBuf[index] & 0xFF);
app_pdm[(index*2)+1] = Channel_Demux[byte1 & CHANNEL_DEMUX_MASK] | Channel_Demux[byte2 & CHANNEL_DEMUX_MASK] << 4;
app_pdm[(index*2)] = Channel_Demux[(byte1 >> 1) & CHANNEL_DEMUX_MASK] | Channel_Demux[(byte2 >> 1) & CHANNEL_DEMUX_MASK] << 4;
}for (index = 0; index
for(index = 0; index < DEFAULT_AUDIO_IN_CHANNEL_NBR; index++)
{
PDM_Filter((uint8_t*)&app_pdm[index], (uint16_t*)&(PCMBuf[index]), &PDM_FilterHandler[index]);
}for (index = 0; index < DEFAULT_AUDIO_IN_CHANNEL_NBR; 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();
}{ ... }
/* ... */
void HAL_I2S_ErrorCallback(I2S_HandleTypeDef *hi2s)
{
/* ... */
BSP_AUDIO_IN_Error_Callback();
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_TransferComplete_CallBack(void)
{
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_HalfTransfer_CallBack(void)
{
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_Error_Callback(void)
{
/* ... */
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_MspInit(I2S_HandleTypeDef *hi2s, void *Params)
{
static DMA_HandleTypeDef hdma_i2s_rx;
GPIO_InitTypeDef gpio_init_structure;
TIMx_Init();
AUDIO_I2Sx_CLK_ENABLE();
AUDIO_I2Sx_SD_GPIO_CLK_ENABLE();
AUDIO_I2Sx_SCK_GPIO_CLK_ENABLE();
gpio_init_structure.Pin = AUDIO_I2Sx_SCK_PIN;
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Pull = GPIO_NOPULL;
gpio_init_structure.Speed = GPIO_SPEED_FAST;
gpio_init_structure.Alternate = AUDIO_I2Sx_SCK_AF;
HAL_GPIO_Init(AUDIO_I2Sx_SCK_GPIO_PORT, &gpio_init_structure);
gpio_init_structure.Pin = AUDIO_I2Sx_SD_PIN;
gpio_init_structure.Alternate = AUDIO_I2Sx_SD_AF;
HAL_GPIO_Init(AUDIO_I2Sx_SD_GPIO_PORT, &gpio_init_structure);
AUDIO_I2Sx_DMAx_CLK_ENABLE();
if(hi2s->Instance == AUDIO_I2Sx)
{
hdma_i2s_rx.Init.Channel = AUDIO_I2Sx_DMAx_CHANNEL;
hdma_i2s_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
hdma_i2s_rx.Init.PeriphInc = DMA_PINC_DISABLE;
hdma_i2s_rx.Init.MemInc = DMA_MINC_ENABLE;
hdma_i2s_rx.Init.PeriphDataAlignment = AUDIO_I2Sx_DMAx_PERIPH_DATA_SIZE;
hdma_i2s_rx.Init.MemDataAlignment = AUDIO_I2Sx_DMAx_MEM_DATA_SIZE;
hdma_i2s_rx.Init.Mode = DMA_CIRCULAR;
hdma_i2s_rx.Init.Priority = DMA_PRIORITY_HIGH;
hdma_i2s_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
hdma_i2s_rx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
hdma_i2s_rx.Init.MemBurst = DMA_MBURST_SINGLE;
hdma_i2s_rx.Init.PeriphBurst = DMA_MBURST_SINGLE;
hdma_i2s_rx.Instance = AUDIO_I2Sx_DMAx_STREAM;
__HAL_LINKDMA(hi2s, hdmarx, hdma_i2s_rx);
HAL_DMA_DeInit(&hdma_i2s_rx);
HAL_DMA_Init(&hdma_i2s_rx);
}if (hi2s->Instance == AUDIO_I2Sx) { ... }
HAL_NVIC_SetPriority(AUDIO_I2Sx_DMAx_IRQ, AUDIO_IN_IRQ_PREPRIO, 0);
HAL_NVIC_EnableIRQ(AUDIO_I2Sx_DMAx_IRQ);
}{ ... }
/* ... */
__weak void BSP_AUDIO_IN_MspDeInit(I2S_HandleTypeDef *hi2s, void *Params)
{
GPIO_InitTypeDef gpio_init_structure;
HAL_NVIC_DisableIRQ(AUDIO_I2Sx_DMAx_IRQ);
if(hi2s->Instance == AUDIO_I2Sx)
{
HAL_DMA_DeInit(hi2s->hdmarx);
}if (hi2s->Instance == AUDIO_I2Sx) { ... }
__HAL_I2S_DISABLE(hi2s);
gpio_init_structure.Pin = AUDIO_I2Sx_SCK_PIN;
HAL_GPIO_DeInit(AUDIO_I2Sx_SCK_GPIO_PORT, gpio_init_structure.Pin);
gpio_init_structure.Pin = AUDIO_I2Sx_SD_PIN;
HAL_GPIO_DeInit(AUDIO_I2Sx_SD_GPIO_PORT, gpio_init_structure.Pin);
AUDIO_I2Sx_CLK_DISABLE();
/* ... */
}{ ... }
/* ... */
/* ... */
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 void I2Sx_Init(uint32_t AudioFreq)
{
haudio_in_i2s.Instance = AUDIO_I2Sx;
__HAL_I2S_DISABLE(&haudio_in_i2s);
haudio_in_i2s.Init.AudioFreq = 4 * AudioFreq;
haudio_in_i2s.Init.ClockSource = I2S_CLOCK_PLL;
haudio_in_i2s.Init.CPOL = I2S_CPOL_LOW;
haudio_in_i2s.Init.DataFormat = I2S_DATAFORMAT_16B;
haudio_in_i2s.Init.MCLKOutput = I2S_MCLKOUTPUT_DISABLE;
haudio_in_i2s.Init.Mode = I2S_MODE_MASTER_RX;
haudio_in_i2s.Init.Standard = I2S_STANDARD_LSB;
HAL_I2S_Init(&haudio_in_i2s);
__HAL_I2S_ENABLE(&haudio_in_i2s);
}{ ... }
/* ... */
static void I2Sx_DeInit(void)
{
haudio_in_i2s.Instance = AUDIO_I2Sx;
__HAL_I2S_DISABLE(&haudio_in_i2s);
HAL_I2S_DeInit(&haudio_in_i2s);
}{ ... }
/* ... */
static void TIMx_IC_MspInit(TIM_HandleTypeDef *htim)
{
GPIO_InitTypeDef gpio_init_structure;
AUDIO_TIMx_CLK_ENABLE();
AUDIO_TIMx_GPIO_CLK_ENABLE();
Enable peripherals and GPIO Clocks
gpio_init_structure.Mode = GPIO_MODE_AF_PP;
gpio_init_structure.Pull = GPIO_NOPULL;
gpio_init_structure.Speed = GPIO_SPEED_HIGH;
gpio_init_structure.Alternate = AUDIO_TIMx_AF;
gpio_init_structure.Pin = AUDIO_TIMx_IN_GPIO_PIN;
HAL_GPIO_Init(AUDIO_TIMx_GPIO_PORT, &gpio_init_structure);
gpio_init_structure.Pin = AUDIO_TIMx_OUT_GPIO_PIN;
HAL_GPIO_Init(AUDIO_TIMx_GPIO_PORT, &gpio_init_structure);
}{ ... }
/* ... */
static void TIMx_IC_MspDeInit(TIM_HandleTypeDef *htim)
{
AUDIO_TIMx_CLK_DISABLE();
/* ... */
}{ ... }
/* ... */
static void TIMx_Init(void)
{
TIM_IC_InitTypeDef s_ic_config;
TIM_OC_InitTypeDef s_oc_config;
TIM_ClockConfigTypeDef s_clk_source_config;
TIM_SlaveConfigTypeDef s_slave_config;
haudio_tim.Instance = AUDIO_TIMx;
/* ... */
haudio_tim.Init.Period = 1;
haudio_tim.Init.Prescaler = 0;
haudio_tim.Init.ClockDivision = 0;
haudio_tim.Init.CounterMode = TIM_COUNTERMODE_UP;
TIMx_IC_MspInit(&haudio_tim);
HAL_TIM_IC_Init(&haudio_tim);
Configure the TIM peripheral
s_ic_config.ICPolarity = TIM_ICPOLARITY_FALLING;
s_ic_config.ICSelection = TIM_ICSELECTION_DIRECTTI;
s_ic_config.ICPrescaler = TIM_ICPSC_DIV1;
s_ic_config.ICFilter = 0;
HAL_TIM_IC_ConfigChannel(&haudio_tim, &s_ic_config, AUDIO_TIMx_IN_CHANNEL);
s_clk_source_config.ClockSource = TIM_CLOCKSOURCE_ETRMODE1;
s_clk_source_config.ClockPolarity = TIM_CLOCKPOLARITY_NONINVERTED;
s_clk_source_config.ClockPrescaler = TIM_CLOCKPRESCALER_DIV1;
s_clk_source_config.ClockFilter = 0;
HAL_TIM_ConfigClockSource(&haudio_tim, &s_clk_source_config);
s_slave_config.InputTrigger = TIM_TS_TI1FP1;
s_slave_config.SlaveMode = TIM_SLAVEMODE_EXTERNAL1;
s_slave_config.TriggerPolarity = TIM_TRIGGERPOLARITY_NONINVERTED;
s_slave_config.TriggerPrescaler = TIM_CLOCKPRESCALER_DIV1;
s_slave_config.TriggerFilter = 0;
HAL_TIM_SlaveConfigSynchronization(&haudio_tim, &s_slave_config);
s_oc_config.OCMode = TIM_OCMODE_PWM1;
s_oc_config.OCIdleState = TIM_OCIDLESTATE_SET;
s_oc_config.Pulse = 1;
s_oc_config.OCPolarity = TIM_OCPOLARITY_HIGH;
s_oc_config.OCNPolarity = TIM_OCNPOLARITY_HIGH;
s_oc_config.OCFastMode = TIM_OCFAST_DISABLE;
s_oc_config.OCNIdleState = TIM_OCNIDLESTATE_SET;
HAL_TIM_PWM_ConfigChannel(&haudio_tim, &s_oc_config, AUDIO_TIMx_OUT_CHANNEL);
HAL_TIM_PWM_Start(&haudio_tim, AUDIO_TIMx_OUT_CHANNEL);
HAL_TIM_IC_Start(&haudio_tim, AUDIO_TIMx_IN_CHANNEL);
}{ ... }
/* ... */
static void TIMx_DeInit(void)
{
haudio_tim.Instance = AUDIO_TIMx;
HAL_TIM_PWM_Stop(&haudio_tim, AUDIO_TIMx_OUT_CHANNEL);
HAL_TIM_IC_Stop(&haudio_tim, AUDIO_TIMx_IN_CHANNEL);
HAL_TIM_IC_DeInit(&haudio_tim);
TIMx_IC_MspDeInit(&haudio_tim);
}{ ... }
/* ... */
/* ... */
/* ... */
/* ... */