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stm32f7508_discovery_audio.c
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/**
******************************************************************************
* @file stm32f7508_discovery_audio.c
* @author MCD Application Team
* @brief This file provides the Audio driver for the STM32F7508-Discovery board.
*
******************************************************************************
* @attention
*
* Copyright (c) 2018 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@verbatim
How To use this driver:
-----------------------
+ This driver supports STM32F7xx devices on STM32F7508-Discovery (MB1191) board.
+ Call the function BSP_AUDIO_OUT_Init(
OutputDevice: physical output mode (OUTPUT_DEVICE_SPEAKER,
OUTPUT_DEVICE_HEADPHONE or OUTPUT_DEVICE_BOTH)
Volume : Initial volume to be set (0 is min (mute), 100 is max (100%)
AudioFreq : Audio frequency in Hz (8000, 16000, 22500, 32000...)
this parameter is relative to the audio file/stream type.
)
This function configures all the hardware required for the audio application (codec, I2C, SAI,
GPIOs, DMA and interrupt if needed). This function returns AUDIO_OK if configuration is OK.
If the returned value is different from AUDIO_OK or the function is stuck then the communication with
the codec or the MFX has failed (try to un-plug the power or reset device in this case).
- OUTPUT_DEVICE_SPEAKER : only speaker will be set as output for the audio stream.
- OUTPUT_DEVICE_HEADPHONE: only headphones will be set as output for the audio stream.
- OUTPUT_DEVICE_BOTH : both Speaker and Headphone are used as outputs for the audio stream
at the same time.
Note. On STM32F7508-Discovery SAI_DMA is configured in CIRCULAR mode. Due to this the application
does NOT need to call BSP_AUDIO_OUT_ChangeBuffer() to assure streaming.
+ Call the function BSP_DISCOVERY_AUDIO_OUT_Play(
pBuffer: pointer to the audio data file address
Size : size of the buffer to be sent in Bytes
)
to start playing (for the first time) from the audio file/stream.
+ Call the function BSP_AUDIO_OUT_Pause() to pause playing
+ Call the function BSP_AUDIO_OUT_Resume() to resume playing.
Note. After calling BSP_AUDIO_OUT_Pause() function for pause, only BSP_AUDIO_OUT_Resume() should be called
for resume (it is not allowed to call BSP_AUDIO_OUT_Play() in this case).
Note. This function should be called only when the audio file is played or paused (not stopped).
+ For each mode, you may need to implement the relative callback functions into your code.
The Callback functions are named AUDIO_OUT_XXX_CallBack() and only their prototypes are declared in
the stm32f7508_discovery_audio.h file. (refer to the example for more details on the callbacks implementations)
+ To Stop playing, to modify the volume level, the frequency, the audio frame slot,
the device output mode the mute or the stop, use the functions: BSP_AUDIO_OUT_SetVolume(),
AUDIO_OUT_SetFrequency(), BSP_AUDIO_OUT_SetAudioFrameSlot(), BSP_AUDIO_OUT_SetOutputMode(),
BSP_AUDIO_OUT_SetMute() and BSP_AUDIO_OUT_Stop().
+ The driver API and the callback functions are at the end of the stm32f7508_discovery_audio.h file.
Driver architecture:
--------------------
+ This driver provides the High Audio Layer: consists of the function API exported in the stm32f7508_discovery_audio.h file
(BSP_AUDIO_OUT_Init(), BSP_AUDIO_OUT_Play() ...)
+ This driver provide also the Media Access Layer (MAL): which consists of functions allowing to access the media containing/
providing the audio file/stream. These functions are also included as local functions into
the stm32f7508_discovery_audio_codec.c file (SAIx_Out_Init() and SAIx_Out_DeInit(), SAIx_In_Init() and SAIx_In_DeInit())
Known Limitations:
------------------
1- If the TDM Format used to play in parallel 2 audio Stream (the first Stream is configured in codec SLOT0 and second
Stream in SLOT1) the Pause/Resume, volume and mute feature will control the both streams.
2- Parsing of audio file is not implemented (in order to determine audio file properties: Mono/Stereo, Data size,
File size, Audio Frequency, Audio Data header size ...). The configuration is fixed for the given audio file.
3- Supports only Stereo audio streaming.
4- Supports only 16-bits audio data size.
@endverbatim
******************************************************************************
*/
/* Dependencies
- stm32f7508_discovery.c
- stm32f7xx_hal_sai.c
- stm32f7xx_hal_dma.c
- stm32f7xx_hal_gpio.c
- stm32f7xx_hal_cortex.c
- stm32f7xx_hal_rcc_ex.h
- wm8994.c
EndDependencies */
/* Includes ------------------------------------------------------------------*/
#include "stm32f7508_discovery_audio.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup STM32F7508_DISCOVERY
* @{
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO STM32F7508_DISCOVERY_AUDIO
* @brief This file includes the low layer driver for wm8994 Audio Codec
* available on STM32F7508-Discovery board(MB1191).
* @{
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO_Private_Types STM32F7508_DISCOVERY AUDIO Private Types
* @{
*/
/**
* @}
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO_Private_Defines STM32F7508_DISCOVERY AUDIO Private Defines
* @{
*/
/**
* @}
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO_Private_Macros STM32F7508_DISCOVERY AUDIO Private Macros
* @{
*/
/**
* @}
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO_Private_Variables STM32F7508_DISCOVERY AUDIO Private Variables
* @{
*/
AUDIO_DrvTypeDef *audio_drv;
SAI_HandleTypeDef haudio_out_sai={0};
SAI_HandleTypeDef haudio_in_sai={0};
TIM_HandleTypeDef haudio_tim;
uint16_t __IO AudioInVolume = DEFAULT_AUDIO_IN_VOLUME;
/**
* @}
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO_Private_Function_Prototypes STM32F7508_DISCOVERY AUDIO Private Function Prototypes
* @{
*/
static void SAIx_Out_Init(uint32_t AudioFreq);
static void SAIx_Out_DeInit(void);
static void SAIx_In_Init(uint32_t SaiOutMode, uint32_t SlotActive, uint32_t AudioFreq);
static void SAIx_In_DeInit(void);
/**
* @}
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO_OUT_Exported_Functions STM32F7508_DISCOVERY AUDIO Out Exported Functions
* @{
*/
/**
* @brief Configures the audio peripherals.
* @param OutputDevice: OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE,
* or OUTPUT_DEVICE_BOTH.
* @param Volume: Initial volume level (from 0 (Mute) to 100 (Max))
* @param AudioFreq: Audio frequency used to play the audio stream.
* @note The I2S PLL input clock must be done in the user application.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_Init(uint16_t OutputDevice, uint8_t Volume, uint32_t AudioFreq)
{
uint8_t ret = AUDIO_ERROR;
uint32_t deviceid = 0x00;
/* Disable SAI */
SAIx_Out_DeInit();
/* PLL clock is set depending on the AudioFreq (44.1khz vs 48khz groups) */
BSP_AUDIO_OUT_ClockConfig(&haudio_out_sai, AudioFreq, NULL);
/* SAI data transfer preparation:
Prepare the Media to be used for the audio transfer from memory to SAI peripheral */
haudio_out_sai.Instance = AUDIO_OUT_SAIx;
if(HAL_SAI_GetState(&haudio_out_sai) == HAL_SAI_STATE_RESET)
{
/* Init the SAI MSP: this __weak function can be redefined by the application*/
BSP_AUDIO_OUT_MspInit(&haudio_out_sai, NULL);
}
SAIx_Out_Init(AudioFreq);
/* wm8994 codec initialization */
deviceid = wm8994_drv.ReadID(AUDIO_I2C_ADDRESS);
if((deviceid) == WM8994_ID)
{
/* Reset the Codec Registers */
wm8994_drv.Reset(AUDIO_I2C_ADDRESS);
/* Initialize the audio driver structure */
audio_drv = &wm8994_drv;
ret = AUDIO_OK;
}
else
{
ret = AUDIO_ERROR;
}
if(ret == AUDIO_OK)
{
/* Initialize the codec internal registers */
audio_drv->Init(AUDIO_I2C_ADDRESS, OutputDevice, Volume, AudioFreq);
}
return ret;
}
/**
* @brief Starts playing audio stream from a data buffer for a determined size.
* @param pBuffer: Pointer to the buffer
* @param Size: Number of audio data in BYTES unit.
* In memory, first element is for left channel, second element is for right channel
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_Play(uint16_t* pBuffer, uint32_t Size)
{
/* Call the audio Codec Play function */
if(audio_drv->Play(AUDIO_I2C_ADDRESS, pBuffer, Size) != 0)
{
return AUDIO_ERROR;
}
else
{
/* Update the Media layer and enable it for play */
HAL_SAI_Transmit_DMA(&haudio_out_sai, (uint8_t*) pBuffer, DMA_MAX(Size / AUDIODATA_SIZE));
return AUDIO_OK;
}
}
/**
* @brief Sends n-Bytes on the SAI interface.
* @param pData: pointer on data address
* @param Size: number of data to be written
* @retval None
*/
void BSP_AUDIO_OUT_ChangeBuffer(uint16_t *pData, uint16_t Size)
{
HAL_SAI_Transmit_DMA(&haudio_out_sai, (uint8_t*) pData, Size);
}
/**
* @brief This function Pauses the audio file stream. In case
* of using DMA, the DMA Pause feature is used.
* @note When calling BSP_AUDIO_OUT_Pause() function for pause, only
* BSP_AUDIO_OUT_Resume() function should be called for resume (use of BSP_AUDIO_OUT_Play()
* function for resume could lead to unexpected behaviour).
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_Pause(void)
{
/* Call the Audio Codec Pause/Resume function */
if(audio_drv->Pause(AUDIO_I2C_ADDRESS) != 0)
{
return AUDIO_ERROR;
}
else
{
/* Call the Media layer pause function */
HAL_SAI_DMAPause(&haudio_out_sai);
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**
* @brief This function Resumes the audio file stream.
* @note When calling BSP_AUDIO_OUT_Pause() function for pause, only
* BSP_AUDIO_OUT_Resume() function should be called for resume (use of BSP_AUDIO_OUT_Play()
* function for resume could lead to unexpected behaviour).
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_Resume(void)
{
/* Call the Audio Codec Pause/Resume function */
if(audio_drv->Resume(AUDIO_I2C_ADDRESS) != 0)
{
return AUDIO_ERROR;
}
else
{
/* Call the Media layer pause/resume function */
HAL_SAI_DMAResume(&haudio_out_sai);
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**
* @brief Stops audio playing and Power down the Audio Codec.
* @param Option: could be one of the following parameters
* - CODEC_PDWN_SW: for software power off (by writing registers).
* Then no need to reconfigure the Codec after power on.
* - CODEC_PDWN_HW: completely shut down the codec (physically).
* Then need to reconfigure the Codec after power on.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_Stop(uint32_t Option)
{
/* Call the Media layer stop function */
HAL_SAI_DMAStop(&haudio_out_sai);
/* Call Audio Codec Stop function */
if(audio_drv->Stop(AUDIO_I2C_ADDRESS, Option) != 0)
{
return AUDIO_ERROR;
}
else
{
if(Option == CODEC_PDWN_HW)
{
/* Wait at least 100us */
HAL_Delay(1);
}
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**
* @brief Controls the current audio volume level.
* @param Volume: Volume level to be set in percentage from 0% to 100% (0 for
* Mute and 100 for Max volume level).
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_SetVolume(uint8_t Volume)
{
/* Call the codec volume control function with converted volume value */
if(audio_drv->SetVolume(AUDIO_I2C_ADDRESS, Volume) != 0)
{
return AUDIO_ERROR;
}
else
{
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**
* @brief Enables or disables the MUTE mode by software
* @param Cmd: Could be AUDIO_MUTE_ON to mute sound or AUDIO_MUTE_OFF to
* unmute the codec and restore previous volume level.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_SetMute(uint32_t Cmd)
{
/* Call the Codec Mute function */
if(audio_drv->SetMute(AUDIO_I2C_ADDRESS, Cmd) != 0)
{
return AUDIO_ERROR;
}
else
{
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**
* @brief Switch dynamically (while audio file is played) the output target
* (speaker or headphone).
* @param Output: The audio output target: OUTPUT_DEVICE_SPEAKER,
* OUTPUT_DEVICE_HEADPHONE or OUTPUT_DEVICE_BOTH
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_OUT_SetOutputMode(uint8_t Output)
{
/* Call the Codec output device function */
if(audio_drv->SetOutputMode(AUDIO_I2C_ADDRESS, Output) != 0)
{
return AUDIO_ERROR;
}
else
{
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**
* @brief Updates the audio frequency.
* @param AudioFreq: Audio frequency used to play the audio stream.
* @note This API should be called after the BSP_AUDIO_OUT_Init() to adjust the
* audio frequency.
* @retval None
*/
void BSP_AUDIO_OUT_SetFrequency(uint32_t AudioFreq)
{
/* PLL clock is set depending by the AudioFreq (44.1khz vs 48khz groups) */
BSP_AUDIO_OUT_ClockConfig(&haudio_out_sai, AudioFreq, NULL);
/* Disable SAI peripheral to allow access to SAI internal registers */
__HAL_SAI_DISABLE(&haudio_out_sai);
/* Update the SAI audio frequency configuration */
haudio_out_sai.Init.AudioFrequency = AudioFreq;
HAL_SAI_Init(&haudio_out_sai);
/* Enable SAI peripheral to generate MCLK */
__HAL_SAI_ENABLE(&haudio_out_sai);
}
/**
* @brief Updates the Audio frame slot configuration.
* @param AudioFrameSlot: specifies the audio Frame slot
* This parameter can be one of the following values
* @arg CODEC_AUDIOFRAME_SLOT_0123
* @arg CODEC_AUDIOFRAME_SLOT_02
* @arg CODEC_AUDIOFRAME_SLOT_13
* @note This API should be called after the BSP_AUDIO_OUT_Init() to adjust the
* audio frame slot.
* @retval None
*/
void BSP_AUDIO_OUT_SetAudioFrameSlot(uint32_t AudioFrameSlot)
{
/* Disable SAI peripheral to allow access to SAI internal registers */
__HAL_SAI_DISABLE(&haudio_out_sai);
/* Update the SAI audio frame slot configuration */
haudio_out_sai.SlotInit.SlotActive = AudioFrameSlot;
HAL_SAI_Init(&haudio_out_sai);
/* Enable SAI peripheral to generate MCLK */
__HAL_SAI_ENABLE(&haudio_out_sai);
}
/**
* @brief Deinit the audio peripherals.
* @retval None
*/
void BSP_AUDIO_OUT_DeInit(void)
{
SAIx_Out_DeInit();
/* DeInit the SAI MSP : this __weak function can be rewritten by the application */
BSP_AUDIO_OUT_MspDeInit(&haudio_out_sai, NULL);
}
/**
* @brief Tx Transfer completed callbacks.
* @param hsai: SAI handle
* @retval None
*/
void HAL_SAI_TxCpltCallback(SAI_HandleTypeDef *hsai)
{
/* Manage the remaining file size and new address offset: This function
should be coded by user (its prototype is already declared in stm32f7508_discovery_audio.h) */
BSP_AUDIO_OUT_TransferComplete_CallBack();
}
/**
* @brief Tx Half Transfer completed callbacks.
* @param hsai: SAI handle
* @retval None
*/
void HAL_SAI_TxHalfCpltCallback(SAI_HandleTypeDef *hsai)
{
/* Manage the remaining file size and new address offset: This function
should be coded by user (its prototype is already declared in stm32f7508_discovery_audio.h) */
BSP_AUDIO_OUT_HalfTransfer_CallBack();
}
/**
* @brief SAI error callbacks.
* @param hsai: SAI handle
* @retval None
*/
void HAL_SAI_ErrorCallback(SAI_HandleTypeDef *hsai)
{
HAL_SAI_StateTypeDef audio_out_state;
HAL_SAI_StateTypeDef audio_in_state;
audio_out_state = HAL_SAI_GetState(&haudio_out_sai);
audio_in_state = HAL_SAI_GetState(&haudio_in_sai);
/* Determines if it is an audio out or audio in error */
if ((audio_out_state == HAL_SAI_STATE_BUSY) || (audio_out_state == HAL_SAI_STATE_BUSY_TX))
{
BSP_AUDIO_OUT_Error_CallBack();
}
if ((audio_in_state == HAL_SAI_STATE_BUSY) || (audio_in_state == HAL_SAI_STATE_BUSY_RX))
{
BSP_AUDIO_IN_Error_CallBack();
}
}
/**
* @brief Manages the DMA full Transfer complete event.
* @retval None
*/
__weak void BSP_AUDIO_OUT_TransferComplete_CallBack(void)
{
}
/**
* @brief Manages the DMA Half Transfer complete event.
* @retval None
*/
__weak void BSP_AUDIO_OUT_HalfTransfer_CallBack(void)
{
}
/**
* @brief Manages the DMA FIFO error event.
* @retval None
*/
__weak void BSP_AUDIO_OUT_Error_CallBack(void)
{
}
/**
* @brief Initializes BSP_AUDIO_OUT MSP.
* @param hsai: SAI handle
* @param Params
* @retval None
*/
__weak void BSP_AUDIO_OUT_MspInit(SAI_HandleTypeDef *hsai, void *Params)
{
static DMA_HandleTypeDef hdma_sai_tx;
GPIO_InitTypeDef gpio_init_structure;
/* Enable SAI clock */
AUDIO_OUT_SAIx_CLK_ENABLE();
/* Enable GPIO clock */
AUDIO_OUT_SAIx_MCLK_ENABLE();
AUDIO_OUT_SAIx_SCK_SD_ENABLE();
AUDIO_OUT_SAIx_FS_ENABLE();
/* CODEC_SAI pins configuration: FS, SCK, MCK and SD pins ------------------*/
gpio_init_structure.Pin = AUDIO_OUT_SAIx_FS_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_OUT_SAIx_FS_SD_MCLK_AF;
HAL_GPIO_Init(AUDIO_OUT_SAIx_FS_GPIO_PORT, &gpio_init_structure);
gpio_init_structure.Pin = AUDIO_OUT_SAIx_SCK_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_OUT_SAIx_SCK_AF;
HAL_GPIO_Init(AUDIO_OUT_SAIx_SCK_SD_GPIO_PORT, &gpio_init_structure);
gpio_init_structure.Pin = AUDIO_OUT_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_OUT_SAIx_FS_SD_MCLK_AF;
HAL_GPIO_Init(AUDIO_OUT_SAIx_SCK_SD_GPIO_PORT, &gpio_init_structure);
gpio_init_structure.Pin = AUDIO_OUT_SAIx_MCLK_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_OUT_SAIx_FS_SD_MCLK_AF;
HAL_GPIO_Init(AUDIO_OUT_SAIx_MCLK_GPIO_PORT, &gpio_init_structure);
/* Enable the DMA clock */
AUDIO_OUT_SAIx_DMAx_CLK_ENABLE();
if(hsai->Instance == AUDIO_OUT_SAIx)
{
/* Configure the hdma_saiTx handle parameters */
hdma_sai_tx.Init.Channel = AUDIO_OUT_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_OUT_SAIx_DMAx_PERIPH_DATA_SIZE;
hdma_sai_tx.Init.MemDataAlignment = AUDIO_OUT_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_OUT_SAIx_DMAx_STREAM;
/* Associate the DMA handle */
__HAL_LINKDMA(hsai, hdmatx, hdma_sai_tx);
/* Deinitialize the Stream for new transfer */
HAL_DMA_DeInit(&hdma_sai_tx);
/* Configure the DMA Stream */
HAL_DMA_Init(&hdma_sai_tx);
}
/* SAI DMA IRQ Channel configuration */
HAL_NVIC_SetPriority(AUDIO_OUT_SAIx_DMAx_IRQ, AUDIO_OUT_IRQ_PREPRIO, 0);
HAL_NVIC_EnableIRQ(AUDIO_OUT_SAIx_DMAx_IRQ);
}
/**
* @brief Deinitializes SAI MSP.
* @param hsai: SAI handle
* @param Params
* @retval None
*/
__weak void BSP_AUDIO_OUT_MspDeInit(SAI_HandleTypeDef *hsai, void *Params)
{
GPIO_InitTypeDef gpio_init_structure;
/* SAI DMA IRQ Channel deactivation */
HAL_NVIC_DisableIRQ(AUDIO_OUT_SAIx_DMAx_IRQ);
if(hsai->Instance == AUDIO_OUT_SAIx)
{
/* Deinitialize the DMA stream */
HAL_DMA_DeInit(hsai->hdmatx);
}
/* Disable SAI peripheral */
__HAL_SAI_DISABLE(hsai);
/* Deactives CODEC_SAI pins FS, SCK, MCK and SD by putting them in input mode */
gpio_init_structure.Pin = AUDIO_OUT_SAIx_FS_PIN;
HAL_GPIO_DeInit(AUDIO_OUT_SAIx_FS_GPIO_PORT, gpio_init_structure.Pin);
gpio_init_structure.Pin = AUDIO_OUT_SAIx_SCK_PIN;
HAL_GPIO_DeInit(AUDIO_OUT_SAIx_SCK_SD_GPIO_PORT, gpio_init_structure.Pin);
gpio_init_structure.Pin = AUDIO_OUT_SAIx_SD_PIN;
HAL_GPIO_DeInit(AUDIO_OUT_SAIx_SCK_SD_GPIO_PORT, gpio_init_structure.Pin);
gpio_init_structure.Pin = AUDIO_OUT_SAIx_MCLK_PIN;
HAL_GPIO_DeInit(AUDIO_OUT_SAIx_MCLK_GPIO_PORT, gpio_init_structure.Pin);
/* Disable SAI clock */
AUDIO_OUT_SAIx_CLK_DISABLE();
/* GPIO pins clock and DMA clock can be shut down in the application
by surcharging this __weak function */
}
/**
* @brief Clock Config.
* @param hsai: might be required to set audio peripheral predivider if any.
* @param AudioFreq: Audio frequency used to play the audio stream.
* @param Params
* @note This API is called by BSP_AUDIO_OUT_Init() and BSP_AUDIO_OUT_SetFrequency()
* Being __weak it can be overwritten by the application
* @retval None
*/
__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);
/* Set the PLL configuration according to the audio frequency */
if((AudioFreq == AUDIO_FREQUENCY_11K) || (AudioFreq == AUDIO_FREQUENCY_22K) || (AudioFreq == AUDIO_FREQUENCY_44K))
{
/* Configure PLLI2S prescalers */
/* PLLI2S_VCO: VCO_429M
I2S_CLK(first level) = PLLI2S_VCO/PLLI2SQ = 429/2 = 214.5 Mhz
I2S_CLK_x = I2S_CLK(first level)/PLLI2SDIVQ = 214.5/19 = 11.289 Mhz */
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_SAI2;
rcc_ex_clk_init_struct.Sai2ClockSelection = RCC_SAI2CLKSOURCE_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);
}
else /* AUDIO_FREQUENCY_8K, AUDIO_FREQUENCY_16K, AUDIO_FREQUENCY_48K), AUDIO_FREQUENCY_96K */
{
/* I2S clock config
PLLI2S_VCO: VCO_344M
I2S_CLK(first level) = PLLI2S_VCO/PLLI2SQ = 344/7 = 49.142 Mhz
I2S_CLK_x = I2S_CLK(first level)/PLLI2SDIVQ = 49.142/1 = 49.142 Mhz */
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_SAI2;
rcc_ex_clk_init_struct.Sai2ClockSelection = RCC_SAI2CLKSOURCE_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);
}
}
/*******************************************************************************
Static Functions
*******************************************************************************/
/**
* @brief Initializes the output Audio Codec audio interface (SAI).
* @param AudioFreq: Audio frequency to be configured for the SAI peripheral.
* @note The default SlotActive configuration is set to CODEC_AUDIOFRAME_SLOT_0123
* and user can update this configuration using
* @retval None
*/
static void SAIx_Out_Init(uint32_t AudioFreq)
{
/* Initialize the haudio_out_sai Instance parameter */
haudio_out_sai.Instance = AUDIO_OUT_SAIx;
/* Disable SAI peripheral to allow access to SAI internal registers */
__HAL_SAI_DISABLE(&haudio_out_sai);
/* Configure SAI_Block_x
LSBFirst: Disabled
DataSize: 16 */
haudio_out_sai.Init.AudioFrequency = AudioFreq;
haudio_out_sai.Init.AudioMode = SAI_MODEMASTER_TX;
haudio_out_sai.Init.NoDivider = SAI_MASTERDIVIDER_ENABLED;
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_RISINGEDGE;
haudio_out_sai.Init.Synchro = SAI_ASYNCHRONOUS;
haudio_out_sai.Init.OutputDrive = SAI_OUTPUTDRIVE_ENABLED;
haudio_out_sai.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF;
/* Configure SAI_Block_x Frame
Frame Length: 64
Frame active Length: 32
FS Definition: Start frame + Channel Side identification
FS Polarity: FS active Low
FS Offset: FS asserted one bit before the first bit of slot 0 */
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;
/* Configure SAI Block_x Slot
Slot First Bit Offset: 0
Slot Size : 16
Slot Number: 4
Slot Active: All slot actives */
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);
/* Enable SAI peripheral to generate MCLK */
__HAL_SAI_ENABLE(&haudio_out_sai);
}
/**
* @brief Deinitializes the output Audio Codec audio interface (SAI).
* @retval None
*/
static void SAIx_Out_DeInit(void)
{
/* Initialize the haudio_out_sai Instance parameter */
haudio_out_sai.Instance = AUDIO_OUT_SAIx;
/* Disable SAI peripheral */
__HAL_SAI_DISABLE(&haudio_out_sai);
HAL_SAI_DeInit(&haudio_out_sai);
}
/**
* @}
*/
/** @defgroup STM32F7508_DISCOVERY_AUDIO_Out_Private_Functions STM32F7508_DISCOVERY_AUDIO Out Private Functions
* @{
*/
/**
* @brief Initializes wave recording.
* @param AudioFreq: Audio frequency to be configured for the SAI peripheral.
* @param BitRes: Audio frequency to be configured.
* @param ChnlNbr: Channel number.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_IN_Init(uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
{
return BSP_AUDIO_IN_InitEx(INPUT_DEVICE_DIGITAL_MICROPHONE_2, AudioFreq, BitRes, ChnlNbr);
}
/**
* @brief Initializes wave recording.
* @param InputDevice: INPUT_DEVICE_DIGITAL_MICROPHONE_2 or INPUT_DEVICE_INPUT_LINE_1
* @param AudioFreq: Audio frequency to be configured for the SAI peripheral.
* @param BitRes: Audio frequency to be configured.
* @param ChnlNbr: Channel number.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_IN_InitEx(uint16_t InputDevice, uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
{
uint8_t ret = AUDIO_ERROR;
uint32_t deviceid = 0x00;
uint32_t slot_active;
if ((InputDevice != INPUT_DEVICE_INPUT_LINE_1) && /* Only INPUT_LINE_1 and MICROPHONE_2 inputs supported */
(InputDevice != INPUT_DEVICE_DIGITAL_MICROPHONE_2))
{
ret = AUDIO_ERROR;
}
else
{
/* Disable SAI */
SAIx_In_DeInit();
/* PLL clock is set depending on the AudioFreq (44.1khz vs 48khz groups) */
BSP_AUDIO_OUT_ClockConfig(&haudio_in_sai, AudioFreq, NULL); /* Clock config is shared between AUDIO IN and OUT */
/* SAI data transfer preparation:
Prepare the Media to be used for the audio transfer from SAI peripheral to memory */
haudio_in_sai.Instance = AUDIO_IN_SAIx;
if(HAL_SAI_GetState(&haudio_in_sai) == HAL_SAI_STATE_RESET)
{
/* Init the SAI MSP: this __weak function can be redefined by the application*/
BSP_AUDIO_OUT_MspInit(&haudio_in_sai, NULL); /* Initialize GPIOs for SAI2 block A Master signals */
BSP_AUDIO_IN_MspInit(&haudio_in_sai, NULL);
}
/* Configure SAI in master RX mode :
* - SAI2_block_A in master RX mode
* - SAI2_block_B in slave RX mode synchronous from SAI2_block_A
*/
if (InputDevice == INPUT_DEVICE_DIGITAL_MICROPHONE_2)
{
slot_active = CODEC_AUDIOFRAME_SLOT_13;
}
else
{
slot_active = CODEC_AUDIOFRAME_SLOT_02;
}
SAIx_In_Init(SAI_MODEMASTER_RX, slot_active, AudioFreq);
/* wm8994 codec initialization */
deviceid = wm8994_drv.ReadID(AUDIO_I2C_ADDRESS);
if((deviceid) == WM8994_ID)
{
/* Reset the Codec Registers */
wm8994_drv.Reset(AUDIO_I2C_ADDRESS);
/* Initialize the audio driver structure */
audio_drv = &wm8994_drv;
ret = AUDIO_OK;
}
else
{
ret = AUDIO_ERROR;
}
if(ret == AUDIO_OK)
{
/* Initialize the codec internal registers */
audio_drv->Init(AUDIO_I2C_ADDRESS, InputDevice, 100, AudioFreq);
}
}
return ret;
}
/**
* @brief Initializes wave recording and playback in parallel.
* @param InputDevice: INPUT_DEVICE_DIGITAL_MICROPHONE_2
* @param OutputDevice: OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE,
* or OUTPUT_DEVICE_BOTH.
* @param AudioFreq: Audio frequency to be configured for the SAI peripheral.
* @param BitRes: Audio frequency to be configured.
* @param ChnlNbr: Channel number.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_IN_OUT_Init(uint16_t InputDevice, uint16_t OutputDevice, uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
{
uint8_t ret = AUDIO_ERROR;
uint32_t deviceid = 0x00;
uint32_t slot_active;
if (InputDevice != INPUT_DEVICE_DIGITAL_MICROPHONE_2) /* Only MICROPHONE_2 input supported */
{
ret = AUDIO_ERROR;
}
else
{
/* Disable SAI */
SAIx_In_DeInit();
SAIx_Out_DeInit();
/* PLL clock is set depending on the AudioFreq (44.1khz vs 48khz groups) */
BSP_AUDIO_OUT_ClockConfig(&haudio_in_sai, AudioFreq, NULL); /* Clock config is shared between AUDIO IN and OUT */
/* SAI data transfer preparation:
Prepare the Media to be used for the audio transfer from SAI peripheral to memory */
haudio_in_sai.Instance = AUDIO_IN_SAIx;
if(HAL_SAI_GetState(&haudio_in_sai) == HAL_SAI_STATE_RESET)
{
/* Init the SAI MSP: this __weak function can be redefined by the application*/
BSP_AUDIO_IN_MspInit(&haudio_in_sai, NULL);
}
/* SAI data transfer preparation:
Prepare the Media to be used for the audio transfer from memory to SAI peripheral */
haudio_out_sai.Instance = AUDIO_OUT_SAIx;
if(HAL_SAI_GetState(&haudio_out_sai) == HAL_SAI_STATE_RESET)
{
/* Init the SAI MSP: this __weak function can be redefined by the application*/
BSP_AUDIO_OUT_MspInit(&haudio_out_sai, NULL);
}
/* Configure SAI in master mode :
* - SAI2_block_A in master TX mode
* - SAI2_block_B in slave RX mode synchronous from SAI2_block_A
*/
if (InputDevice == INPUT_DEVICE_DIGITAL_MICROPHONE_2)
{
slot_active = CODEC_AUDIOFRAME_SLOT_13;
}
else
{
slot_active = CODEC_AUDIOFRAME_SLOT_02;
}
SAIx_In_Init(SAI_MODEMASTER_TX, slot_active, AudioFreq);
/* wm8994 codec initialization */
deviceid = wm8994_drv.ReadID(AUDIO_I2C_ADDRESS);
if((deviceid) == WM8994_ID)
{
/* Reset the Codec Registers */
wm8994_drv.Reset(AUDIO_I2C_ADDRESS);
/* Initialize the audio driver structure */
audio_drv = &wm8994_drv;
ret = AUDIO_OK;
}
else
{
ret = AUDIO_ERROR;
}
if(ret == AUDIO_OK)
{
/* Initialize the codec internal registers */
audio_drv->Init(AUDIO_I2C_ADDRESS, InputDevice | OutputDevice, 100, AudioFreq);
}
}
return ret;
}
/**
* @brief Starts audio recording.
* @param pbuf: Main buffer pointer for the recorded data storing
* @param size: size of the recorded buffer in number of elements (typically number of half-words)
* Be careful that it is not the same unit than BSP_AUDIO_OUT_Play function
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_IN_Record(uint16_t* pbuf, uint32_t size)
{
uint32_t ret = AUDIO_ERROR;
/* Start the process receive DMA */
HAL_SAI_Receive_DMA(&haudio_in_sai, (uint8_t*)pbuf, size);
/* Return AUDIO_OK when all operations are correctly done */
ret = AUDIO_OK;
return ret;
}
/**
* @brief Stops audio recording.
* @param Option: could be one of the following parameters
* - CODEC_PDWN_SW: for software power off (by writing registers).
* Then no need to reconfigure the Codec after power on.
* - CODEC_PDWN_HW: completely shut down the codec (physically).
* Then need to reconfigure the Codec after power on.
* @retval AUDIO_OK if correct communication, else wrong communication
*/
uint8_t BSP_AUDIO_IN_Stop(uint32_t Option)
{
/* Call the Media layer stop function */
HAL_SAI_DMAStop(&haudio_in_sai);
/* Call Audio Codec Stop function */
if(audio_drv->Stop(AUDIO_I2C_ADDRESS, Option) != 0)
{
return AUDIO_ERROR;
}
else
{
if(Option == CODEC_PDWN_HW)
{
/* Wait at least 100us */
HAL_Delay(1);
}
/* Return AUDIO_OK when all operations are correctly done */
return AUDIO_OK;
}
}
/**