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stm32h745i_discovery_audio.c
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stm32h745i_discovery_audio.c
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/**
******************************************************************************
* @file stm32h745i_discovery_audio.c
* @author MCD Application Team
* @brief This file provides the Audio driver for the STM32H745I-DISCO
* board.
*@verbatim
How To use this driver:
-----------------------
+ This driver supports stm32h7xx devices on STM32H745I-DISCO (MB1381) boards.
+ Call the function BSP_AUDIO_OUT_Init() for AUDIO OUT initialization:
Instance: Select the output instance. It can only be 0 (SAI)
AudioInit: Audio Out structure to select the following parameters
- Device: Select the output device (headphone, speaker, hdmi ..)
- SampleRate: Select the output sample rate (8Khz .. 96Khz)
- BitsPerSample: Select the output resolution (16 or 32bits per sample)
- ChannelsNbr: Select the output channels number(1 for mono, 2 for stereo)
- Volume: Select the output volume(0% .. 100%)
This function configures all the hardware required for the audio application (codec, I2C, SAI,
GPIOs, DMA and interrupt if needed). This function returns BSP_ERROR_NONE if configuration is OK.
If the returned value is different from BSP_ERROR_NONE or the function is stuck then the communication with
the codec has failed (try to un-plug the power or reset device in this case).
User can update the SAI or the clock configurations by overriding the weak MX functions MX_SAI2_Block_A_Init()
and MX_SAI2_ClockConfig()
User can override the default MSP configuration and register his own MSP callbacks (defined at application level)
by calling BSP_AUDIO_OUT_RegisterMspCallbacks() function
User can restore the default MSP configuration by calling BSP_AUDIO_OUT_RegisterDefaultMspCallbacks()
To use these two functions, user have to enable USE_HAL_SAI_REGISTER_CALLBACKS within stm32h7xx_hal_conf.h file
+ Call the function BSP_AUDIO_OUT_Play() to play audio stream:
Instance: Select the output instance. It can only be 0 (SAI)
pBuf: pointer to the audio data file address
NbrOfBytes: Total size of the buffer to be sent in Bytes
+ 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).
+ Call the function BSP_AUDIO_OUT_Stop() to stop playing.
+ Call the function BSP_AUDIO_OUT_Mute() to mute the player.
+ Call the function BSP_AUDIO_OUT_UnMute() to unmute the player.
+ Call the function BSP_AUDIO_OUT_IsMute() to get the mute state(BSP_AUDIO_MUTE_ENABLED or BSP_AUDIO_MUTE_DISABLED).
+ Call the function BSP_AUDIO_OUT_SetDevice() to update the AUDIO OUT device.
+ Call the function BSP_AUDIO_OUT_GetDevice() to get the AUDIO OUT device.
+ Call the function BSP_AUDIO_OUT_SetSampleRate() to update the AUDIO OUT sample rate.
+ Call the function BSP_AUDIO_OUT_GetSampleRate() to get the AUDIO OUT sample rate.
+ Call the function BSP_AUDIO_OUT_SetBitsPerSample() to update the AUDIO OUT resolution.
+ Call the function BSP_AUDIO_OUT_GetBitPerSample() to get the AUDIO OUT resolution.
+ Call the function BSP_AUDIO_OUT_SetChannelsNbr() to update the AUDIO OUT number of channels.
+ Call the function BSP_AUDIO_OUT_GetChannelsNbr() to get the AUDIO OUT number of channels.
+ Call the function BSP_AUDIO_OUT_SetVolume() to update the AUDIO OUT volume.
+ Call the function BSP_AUDIO_OUT_GetVolume() to get the AUDIO OUT volume.
+ Call the function BSP_AUDIO_OUT_GetState() to get the AUDIO OUT state.
+ BSP_AUDIO_OUT_SetDevice(), BSP_AUDIO_OUT_SetSampleRate(), BSP_AUDIO_OUT_SetBitsPerSample() and
BSP_AUDIO_OUT_SetChannelsNbr() cannot be called while the state is AUDIO_OUT_STATE_PLAYING.
+ 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 stm32h745i_discovery_audio.h file. (refer to the example for more details on the callbacks implementations)
+ Call the function BSP_AUDIO_IN_Init() for AUDIO IN initialization:
Instance : Select the input instance. Can be 0 (SAI) or 1 (PDM)
AudioInit: Audio In structure to select the following parameters
- Device: Select the input device (analog, digital micx)
- SampleRate: Select the input sample rate (8Khz .. 96Khz)
- BitsPerSample: Select the input resolution (16 or 32bits per sample)
- ChannelsNbr: Select the input channels number(1 for mono, 2 for stereo)
- Volume: Select the input volume(0% .. 100%)
This function configures all the hardware required for the audio application (codec, I2C, SAI
GPIOs, DMA and interrupt if needed). This function returns BSP_ERROR_NONE if configuration is OK.
If the returned value is different from BSP_ERROR_NONE 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).
User can update the SAI or the clock configurations by overriding the weak MX functions MX_SAIx_Init()and
MX_SAIx_ClockConfig() .
User can override the default MSP configuration and register his own MSP callbacks (defined at application level)
by calling BSP_AUDIO_IN_RegisterMspCallbacks() function
User can restore the default MSP configuration by calling BSP_AUDIO_IN_RegisterDefaultMspCallbacks()
To use these two functions, user have to enable USE_HAL_SAI_REGISTER_CALLBACKS within stm32h7xx_hal_conf.h file .
+ Call the function BSP_AUDIO_IN_Record() to record audio stream. The recorded data are stored to user buffer in raw
(L, R, L, R ...)
Instance : Select the input instance. Can be 0 (SAI) or 1 (PDM)
pBuf: pointer to user buffer
NbrOfBytes: Total size of the buffer to be sent in Bytes
+ Call the function BSP_AUDIO_IN_Pause() to pause recording
+ Call the function BSP_AUDIO_IN_Resume() to resume recording.
+ Call the function BSP_AUDIO_IN_Stop() to stop recording.
+ Call the function BSP_AUDIO_IN_SetDevice() to update the AUDIO IN device.
+ Call the function BSP_AUDIO_IN_GetDevice() to get the AUDIO IN device.
+ Call the function BSP_AUDIO_IN_SetSampleRate() to update the AUDIO IN sample rate.
+ Call the function BSP_AUDIO_IN_GetSampleRate() to get the AUDIO IN sample rate.
+ Call the function BSP_AUDIO_IN_SetBitPerSample() to update the AUDIO IN resolution.
+ Call the function BSP_AUDIO_IN_GetBitPerSample() to get the AUDIO IN resolution.
+ Call the function BSP_AUDIO_IN_SetChannelsNbr() to update the AUDIO IN number of channels.
+ Call the function BSP_AUDIO_IN_GetChannelsNbr() to get the AUDIO IN number of channels.
+ Call the function BSP_AUDIO_IN_SetVolume() to update the AUDIO IN volume.
+ Call the function BSP_AUDIO_IN_GetVolume() to get the AUDIO IN volume.
+ Call the function BSP_AUDIO_IN_GetState() to get the AUDIO IN state.
+ For each mode, you may need to implement the relative callback functions into your code.
The Callback functions are named AUDIO_IN_XXX_CallBack() and only their prototypes are declared in
the stm32h745i_discovery_audio.h file. (refer to the example for more details on the callbacks implementations)
+ The driver API and the callback functions are at the end of the STM32H745I-DISCO_AUDIO.h file.
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.
@endverbatim
******************************************************************************
* @attention
*
* Copyright (c) 2017 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.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32h745i_discovery_audio.h"
#include "stm32h745i_discovery_bus.h"
#include "../Components/Common/audio.h"
/** @addtogroup BSP
* @{
*/
/** @addtogroup STM32H745I_DISCO
* @{
*/
/** @defgroup STM32H745I_DISCO_AUDIO AUDIO
* @brief This file includes the low layer driver for wm8994 Audio Codec
* available on STM32H745I-DISCO discovery board(MB1381).
* @{
*/
/** @defgroup STM32H745I_DISCO_AUDIO_Private_Variables Private Variables
* @{
*/
/* Audio in and out component object */
static AUDIO_Drv_t *Audio_Drv = NULL;
/* PDM filters params */
static PDM_Filter_Handler_t PDM_FilterHandler[2];
static PDM_Filter_Config_t PDM_FilterConfig[2];
/**
* @}
*/
/** @defgroup STM32H745I_DISCO_AUDIO_Exported_Variables Exported Variables
* @{
*/
void *Audio_CompObj = {0};
/* Play */
SAI_HandleTypeDef haudio_out_sai = {0};
AUDIO_OUT_Ctx_t Audio_Out_Ctx[AUDIO_OUT_INSTANCES_NBR];
SAI_HandleTypeDef haudio_in_sai;
AUDIO_IN_Ctx_t Audio_In_Ctx[AUDIO_IN_INSTANCES_NBR];
/**
* @}
*/
/** @defgroup STM32H745I_DISCO_AUDIO_Private_Function_Prototypes Private Function Prototypes
* @{
*/
/* SAI Msp config */
static void SAI_MspInit(SAI_HandleTypeDef *hsai);
static void SAI_MspDeInit(SAI_HandleTypeDef *hsai);
/* SAI callbacks */
#if (USE_HAL_SAI_REGISTER_CALLBACKS == 1U)
static void SAI_TxCpltCallback(SAI_HandleTypeDef *hsai);
static void SAI_TxHalfCpltCallback(SAI_HandleTypeDef *hsai);
static void SAI_RxCpltCallback(SAI_HandleTypeDef *hsai);
static void SAI_RxHalfCpltCallback(SAI_HandleTypeDef *hsai);
static void SAI_ErrorCallback(SAI_HandleTypeDef *hsai);
#endif /* (USE_HAL_SAI_REGISTER_CALLBACKS == 1U) */
#if (USE_AUDIO_CODEC_WM8994 == 1)
static int32_t WM8994_Probe(void);
#endif
/**
* @}
*/
/** @defgroup STM32H745I_DISCO_AUDIO_OUT_Exported_Functions AUDIO OUT Exported Functions
* @{
*/
/**
* @brief Configures the audio peripherals.
* @param Instance AUDIO OUT Instance. It can only be 0 (SAI)
* @param AudioInit AUDIO OUT init Structure
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_Init(uint32_t Instance, BSP_AUDIO_Init_t* AudioInit)
{
int32_t ret = BSP_ERROR_NONE;
if(Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}
else
{
/* Fill Audio_Out_Ctx structure */
Audio_Out_Ctx[Instance].Device = AudioInit->Device;
Audio_Out_Ctx[Instance].Instance = Instance;
Audio_Out_Ctx[Instance].SampleRate = AudioInit->SampleRate;
Audio_Out_Ctx[Instance].BitsPerSample = AudioInit->BitsPerSample;
Audio_Out_Ctx[Instance].ChannelsNbr = AudioInit->ChannelsNbr;
Audio_Out_Ctx[Instance].Volume = AudioInit->Volume;
Audio_Out_Ctx[Instance].State = AUDIO_OUT_STATE_RESET;
#if (USE_AUDIO_CODEC_WM8994 == 1)
if(WM8994_Probe() != BSP_ERROR_NONE)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
#endif
if(ret == BSP_ERROR_NONE)
{
/* PLL clock is set depending by the AudioFreq (44.1khz vs 48khz groups) */
if(MX_SAI2_ClockConfig(&haudio_out_sai, AudioInit->SampleRate) != HAL_OK)
{
ret = BSP_ERROR_CLOCK_FAILURE;
}
else
{
/* 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 (USE_HAL_SAI_REGISTER_CALLBACKS == 0U)
SAI_MspInit(&haudio_out_sai);
#else
/* Register the SAI MSP Callbacks */
if(Audio_Out_Ctx[Instance].IsMspCallbacksValid == 0U)
{
if(BSP_AUDIO_OUT_RegisterDefaultMspCallbacks(Instance) != BSP_ERROR_NONE)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
}
if(ret == BSP_ERROR_NONE)
{
#endif /* (USE_HAL_SAI_REGISTER_CALLBACKS == 0U) */
MX_SAI_Config_t mx_sai_config;
/* Prepare haudio_out_sai handle */
mx_sai_config.AudioFrequency = AudioInit->SampleRate;
mx_sai_config.AudioMode = SAI_MODEMASTER_TX;
mx_sai_config.ClockStrobing = SAI_CLOCKSTROBING_RISINGEDGE;
mx_sai_config.MonoStereoMode = (AudioInit->ChannelsNbr == 1U) ? SAI_MONOMODE : SAI_STEREOMODE;
mx_sai_config.DataSize = (AudioInit->BitsPerSample == AUDIO_RESOLUTION_32B) ? SAI_DATASIZE_32 : SAI_DATASIZE_16;
mx_sai_config.FrameLength = 128;
mx_sai_config.ActiveFrameLength = 64;
mx_sai_config.OutputDrive = SAI_OUTPUTDRIVE_ENABLE;
mx_sai_config.Synchro = SAI_ASYNCHRONOUS;
mx_sai_config.SynchroExt = SAI_SYNCEXT_DISABLE;
mx_sai_config.SlotActive = CODEC_AUDIOFRAME_SLOT_02;
/* SAI peripheral initialization: this __weak function can be redefined by the application */
if(MX_SAI2_Block_A_Init(&haudio_out_sai, &mx_sai_config) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
#if (USE_HAL_SAI_REGISTER_CALLBACKS == 1U)
/* Register SAI TC, HT and Error callbacks */
else if(HAL_SAI_RegisterCallback(&haudio_out_sai, HAL_SAI_TX_COMPLETE_CB_ID, SAI_TxCpltCallback) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else if(HAL_SAI_RegisterCallback(&haudio_out_sai, HAL_SAI_TX_HALFCOMPLETE_CB_ID, SAI_TxHalfCpltCallback) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else
{
if(HAL_SAI_RegisterCallback(&haudio_out_sai, HAL_SAI_ERROR_CB_ID, SAI_ErrorCallback) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
}
#endif
#if (USE_AUDIO_CODEC_WM8994 == 1)
if(ret == BSP_ERROR_NONE)
{
WM8994_Init_t codec_init;
codec_init.Resolution = (AudioInit->BitsPerSample == AUDIO_RESOLUTION_32B) ? 3 : 0;
/* Fill codec_init structure */
codec_init.Frequency = AudioInit->SampleRate;
codec_init.InputDevice = WM8994_IN_NONE;
codec_init.OutputDevice = AudioInit->Device;
/* Convert volume before sending to the codec */
codec_init.Volume = VOLUME_OUT_CONVERT(AudioInit->Volume);
/* Initialize the codec internal registers */
if(Audio_Drv->Init(Audio_CompObj, &codec_init) != 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
}
#endif
#if (USE_HAL_SAI_REGISTER_CALLBACKS == 1)
}
#endif
}
}
/* Update BSP AUDIO OUT state */
if(ret == BSP_ERROR_NONE)
{
Audio_Out_Ctx[Instance].State = AUDIO_OUT_STATE_STOP;
}
}
return ret;
}
/**
* @brief De-initializes the audio out peripheral.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @retval None
*/
int32_t BSP_AUDIO_OUT_DeInit(uint32_t Instance)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}
else
{
#if (USE_HAL_SAI_REGISTER_CALLBACKS == 0U)
SAI_MspDeInit(&haudio_out_sai);
#endif /* (USE_HAL_SAI_REGISTER_CALLBACKS == 0U) */
/* Initialize the haudio_out_sai Instance parameter */
haudio_out_sai.Instance = AUDIO_OUT_SAIx;
/* Call the Media layer stop function */
if (Audio_Drv->DeInit(Audio_CompObj) != 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
else if (HAL_SAI_DeInit(&haudio_out_sai) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else
{
/* Update BSP AUDIO OUT state */
Audio_Out_Ctx[Instance].State = AUDIO_OUT_STATE_RESET;
}
}
/* Return BSP status */
return ret;
}
/**
* @brief Initializes the Audio Codec audio out instance (SAI).
* @param hsai SAI handle
* @param MXConfig SAI configuration structure
* @note Being __weak it can be overwritten by the application
* @retval HAL status
*/
__weak HAL_StatusTypeDef MX_SAI2_Block_A_Init(SAI_HandleTypeDef *hsai, MX_SAI_Config_t *MXConfig)
{
HAL_StatusTypeDef ret = HAL_OK;
/* Disable SAI peripheral to allow access to SAI internal registers */
__HAL_SAI_DISABLE(hsai);
/* Configure SAI1_Block_A */
hsai->Init.MonoStereoMode = MXConfig->MonoStereoMode;
hsai->Init.AudioFrequency = MXConfig->AudioFrequency;
hsai->Init.AudioMode = MXConfig->AudioMode;
hsai->Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
hsai->Init.Protocol = SAI_FREE_PROTOCOL;
hsai->Init.DataSize = MXConfig->DataSize;
hsai->Init.FirstBit = SAI_FIRSTBIT_MSB;
hsai->Init.ClockStrobing = MXConfig->ClockStrobing;
hsai->Init.Synchro = MXConfig->Synchro;
hsai->Init.OutputDrive = MXConfig->OutputDrive;
hsai->Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF;
hsai->Init.SynchroExt = MXConfig->SynchroExt;
hsai->Init.CompandingMode = SAI_NOCOMPANDING;
hsai->Init.TriState = SAI_OUTPUT_NOTRELEASED;
hsai->Init.Mckdiv = 0;
hsai->Init.MckOverSampling = SAI_MCK_OVERSAMPLING_DISABLE;
hsai->Init.MckOutput = SAI_MCK_OUTPUT_DISABLE;
hsai->Init.PdmInit.Activation = DISABLE;
hsai->Init.PdmInit.ClockEnable = 0;
hsai->Init.PdmInit.MicPairsNbr = 0;
/* Configure SAI_Block_x Frame */
hsai->FrameInit.FrameLength = MXConfig->FrameLength;
hsai->FrameInit.ActiveFrameLength = MXConfig->ActiveFrameLength;
hsai->FrameInit.FSDefinition = SAI_FS_CHANNEL_IDENTIFICATION;
hsai->FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
hsai->FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT;
/* Configure SAI Block_x Slot */
hsai->SlotInit.FirstBitOffset = 0;
hsai->SlotInit.SlotSize = SAI_SLOTSIZE_DATASIZE;
hsai->SlotInit.SlotNumber = 4;
hsai->SlotInit.SlotActive = MXConfig->SlotActive;
if (HAL_SAI_Init(hsai) != HAL_OK)
{
ret = HAL_ERROR;
}
/* Enable SAI peripheral to generate MCLK */
__HAL_SAI_ENABLE(hsai);
return ret;
}
/**
* @brief SAI clock Config.
* @param hsai SAI handle
* @param SampleRate Audio frequency used to play the audio stream.
* @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 HAL status
*/
__weak HAL_StatusTypeDef MX_SAI2_ClockConfig(SAI_HandleTypeDef *hsai, uint32_t SampleRate)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hsai);
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((SampleRate == AUDIO_FREQUENCY_11K) || (SampleRate == AUDIO_FREQUENCY_22K) || (SampleRate == AUDIO_FREQUENCY_44K))
{
/* SAI clock config:
PLL2_VCO Input = HSE_VALUE/PLL2M = 1 Mhz
PLL2_VCO Output = PLL2_VCO Input * PLL2N = 429 Mhz
SAI_CLK_x = PLL2_VCO Output/PLL2P = 429/38 = 11.289 Mhz */
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_SAI2;
rcc_ex_clk_init_struct.Sai23ClockSelection = RCC_SAI2CLKSOURCE_PLL2;
rcc_ex_clk_init_struct.PLL2.PLL2P = 38;
rcc_ex_clk_init_struct.PLL2.PLL2N = 429;
}
else /* AUDIO_FREQUENCY_8K, AUDIO_FREQUENCY_16K, AUDIO_FREQUENCY_48K, AUDIO_FREQUENCY_96K */
{
/* SAI clock config:
PLL2_VCO Input = HSE_VALUE/PLL2M = 1 Mhz
PLL2_VCO Output = PLL2_VCO Input * PLL2N = 344 Mhz
SAI_CLK_x = PLL2_VCO Output/PLL2P = 344/7 = 49.142 Mhz */
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_SAI2;
rcc_ex_clk_init_struct.Sai23ClockSelection = RCC_SAI2CLKSOURCE_PLL2;
rcc_ex_clk_init_struct.PLL2.PLL2P = 7;
rcc_ex_clk_init_struct.PLL2.PLL2N = 344;
}
rcc_ex_clk_init_struct.PLL2.PLL2Q = 1;
rcc_ex_clk_init_struct.PLL2.PLL2R = 1;
rcc_ex_clk_init_struct.PLL2.PLL2M = 25;
return HAL_RCCEx_PeriphCLKConfig(&rcc_ex_clk_init_struct);
}
/**
* @brief SAI clock Config.
* @param hsai SAI handle
* @param SampleRate Audio frequency used to play the audio stream.
* @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 HAL status
*/
__weak HAL_StatusTypeDef MX_SAI4_ClockConfig(SAI_HandleTypeDef *hsai, uint32_t SampleRate)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hsai);
HAL_StatusTypeDef ret = HAL_OK;
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((SampleRate == AUDIO_FREQUENCY_11K) || (SampleRate == AUDIO_FREQUENCY_22K) || (SampleRate == AUDIO_FREQUENCY_44K))
{
rcc_ex_clk_init_struct.PLL2.PLL2P = 38;
rcc_ex_clk_init_struct.PLL2.PLL2N = 429;
}
else /* AUDIO_FREQUENCY_8K, AUDIO_FREQUENCY_16K, AUDIO_FREQUENCY_32K, AUDIO_FREQUENCY_48K, AUDIO_FREQUENCY_96K */
{
rcc_ex_clk_init_struct.PLL2.PLL2P = 7;
rcc_ex_clk_init_struct.PLL2.PLL2N = 344;
}
/* SAI clock config */
rcc_ex_clk_init_struct.PeriphClockSelection = RCC_PERIPHCLK_SAI4A;
rcc_ex_clk_init_struct.Sai4AClockSelection = RCC_SAI4ACLKSOURCE_PLL2;
rcc_ex_clk_init_struct.PLL2.PLL2Q = 1;
rcc_ex_clk_init_struct.PLL2.PLL2R = 1;
rcc_ex_clk_init_struct.PLL2.PLL2M = 25;
if(HAL_RCCEx_PeriphCLKConfig(&rcc_ex_clk_init_struct) != HAL_OK)
{
ret = HAL_ERROR;
}
return ret;
}
/**
* @brief Default BSP AUDIO OUT Msp Callbacks
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @retval BSP status
*/
#if (USE_HAL_SAI_REGISTER_CALLBACKS == 1U)
int32_t BSP_AUDIO_OUT_RegisterDefaultMspCallbacks(uint32_t Instance)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}
else
{
__HAL_SAI_RESET_HANDLE_STATE(&haudio_out_sai);
/* Register MspInit/MspDeInit Callbacks */
if (HAL_SAI_RegisterCallback(&haudio_out_sai, HAL_SAI_MSPINIT_CB_ID, SAI_MspInit) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else if (HAL_SAI_RegisterCallback(&haudio_out_sai, HAL_SAI_MSPDEINIT_CB_ID, SAI_MspDeInit) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else
{
Audio_Out_Ctx[Instance].IsMspCallbacksValid = 1;
}
}
/* Return BSP status */
return ret;
}
/**
* @brief BSP AUDIO OUT Msp Callback registering
* @param Instance AUDIO OUT Instance. It can only be 0
* @param CallBacks pointer to MspInit/MspDeInit callbacks functions
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_RegisterMspCallbacks(uint32_t Instance, BSP_AUDIO_OUT_Cb_t *CallBacks)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}
else
{
__HAL_SAI_RESET_HANDLE_STATE(&haudio_out_sai);
/* Register MspInit/MspDeInit Callbacks */
if (HAL_SAI_RegisterCallback(&haudio_out_sai, HAL_SAI_MSPINIT_CB_ID, CallBacks->pMspInitCb) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else if (HAL_SAI_RegisterCallback(&haudio_out_sai, HAL_SAI_MSPDEINIT_CB_ID, CallBacks->pMspDeInitCb) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else
{
Audio_Out_Ctx[Instance].IsMspCallbacksValid = 1;
}
}
/* Return BSP status */
return ret;
}
#endif /*(USE_HAL_SAI_REGISTER_CALLBACKS == 1U)*/
/**
* @brief Starts playing audio stream from a data buffer for a determined size.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @param pData pointer on data address
* @param NbrOfBytes Size of total samples in bytes
* BitsPerSample: 16 or 32
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_Play(uint32_t Instance, uint8_t *pData, uint32_t NbrOfBytes)
{
int32_t ret = BSP_ERROR_NONE;
if ((Instance >= AUDIO_OUT_INSTANCES_NBR) || (((NbrOfBytes / (Audio_Out_Ctx[Instance].BitsPerSample / 8U)) > 0xFFFFU)))
{
ret = BSP_ERROR_WRONG_PARAM;
}
else if (Audio_Out_Ctx[Instance].State != AUDIO_OUT_STATE_STOP)
{
ret = BSP_ERROR_BUSY;
}
else if (HAL_SAI_Transmit_DMA(&haudio_out_sai, pData, (uint16_t)(NbrOfBytes / (Audio_Out_Ctx[Instance].BitsPerSample / 8U))) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else
{
if (Audio_Drv->Play(Audio_CompObj) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
/* Update BSP AUDIO OUT state */
Audio_Out_Ctx[Instance].State = AUDIO_OUT_STATE_PLAYING;
}
/* Return BSP status */
return ret;
}
/**
* @brief This function Pauses the audio file stream. In case
* of using DMA, the DMA Pause feature is used.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @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 behavior).
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_Pause(uint32_t Instance)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State != AUDIO_OUT_STATE_PLAYING)
{
ret = BSP_ERROR_BUSY;
}/* Call the Media layer pause function */
else if (HAL_SAI_DMAPause(&haudio_out_sai) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}/* Call the Audio Codec Pause/Resume function */
else if (Audio_Drv->Pause(Audio_CompObj) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
else
{
/* Update BSP AUDIO OUT state */
Audio_Out_Ctx[Instance].State = AUDIO_OUT_STATE_PAUSE;
}
/* Return BSP status */
return ret;
}
/**
* @brief Resumes the audio file stream.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @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 behavior).
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_Resume(uint32_t Instance)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State != AUDIO_OUT_STATE_PAUSE)
{
ret = BSP_ERROR_BUSY;
}/* Call the audio codec resume function */
else if (Audio_Drv->Resume(Audio_CompObj) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}/* Call the Media layer pause/resume function */
else if (HAL_SAI_DMAResume(&haudio_out_sai) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else
{
/* Update BSP AUDIO OUT state */
Audio_Out_Ctx[Instance].State = AUDIO_OUT_STATE_PLAYING;
}
/* Return BSP status */
return ret;
}
/**
* @brief Stops audio playing and Power down the Audio Codec.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_Stop(uint32_t Instance)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State == AUDIO_OUT_STATE_STOP)
{
/* Nothing to do */
}
else if ((Audio_Out_Ctx[Instance].State != AUDIO_OUT_STATE_PLAYING) &&
(Audio_Out_Ctx[Instance].State != AUDIO_OUT_STATE_PAUSE))
{
ret = BSP_ERROR_BUSY;
}/* Call the Media layer stop function */
else if (Audio_Drv->Stop(Audio_CompObj, CODEC_PDWN_SW) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
else if (HAL_SAI_DMAStop(&haudio_out_sai) != HAL_OK)
{
ret = BSP_ERROR_PERIPH_FAILURE;
}
else
{
/* Update BSP AUDIO OUT state */
Audio_Out_Ctx[Instance].State = AUDIO_OUT_STATE_STOP;
}
/* Return BSP status */
return ret;
}
/**
* @brief Controls the current audio volume level.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @param Volume Volume level to be set in percentage from 0% to 100% (0 for
* Mute and 100 for Max volume level).
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_SetVolume(uint32_t Instance, uint32_t Volume)
{
int32_t ret = BSP_ERROR_NONE;
if ((Instance >= AUDIO_OUT_INSTANCES_NBR) || (Volume > 100U))
{
ret = BSP_ERROR_WRONG_PARAM;
}
else
{
/* Call the codec volume control function with converted volume value */
if (Audio_Drv->SetVolume(Audio_CompObj, AUDIO_VOLUME_OUTPUT, VOLUME_OUT_CONVERT(Volume)) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
else if (Volume == 0U)
{
/* Update Mute State */
Audio_Out_Ctx[Instance].IsMute = BSP_AUDIO_MUTE_ENABLED;
}
else
{
/* Update Mute State */
Audio_Out_Ctx[Instance].IsMute = BSP_AUDIO_MUTE_DISABLED;
}
Audio_Out_Ctx[Instance].Volume = Volume;
}
/* Return BSP status */
return ret;
}
/**
* @brief Get the current audio volume level.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @param Volume pointer to volume to be returned
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_GetVolume(uint32_t Instance, uint32_t *Volume)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}
else if (Audio_Out_Ctx[Instance].State == AUDIO_OUT_STATE_RESET)
{
ret = BSP_ERROR_BUSY;
}
else
{
*Volume = Audio_Out_Ctx[Instance].Volume;
}
/* Return BSP status */
return ret;
}
/**
* @brief Enables the MUTE
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_Mute(uint32_t Instance)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State == AUDIO_OUT_STATE_RESET)
{
ret = BSP_ERROR_BUSY;
}/* Check audio out mute status */
else if (Audio_Out_Ctx[Instance].IsMute == 1U)
{
/* Nothing to do */
}/* Call the audio codec mute function */
else if (Audio_Drv->SetMute(Audio_CompObj, CODEC_MUTE_ON) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
else
{
/* Update audio out mute status */
Audio_Out_Ctx[Instance].IsMute = 1U;
}
/* Return BSP status */
return ret;
}
/**
* @brief Disables the MUTE mode
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_UnMute(uint32_t Instance)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State == AUDIO_OUT_STATE_RESET)
{
ret = BSP_ERROR_BUSY;
}/* Check audio out mute status */
else if (Audio_Out_Ctx[Instance].IsMute == 0U)
{
/* Nothing to do */
}/* Call the audio codec mute function */
else if (Audio_Drv->SetMute(Audio_CompObj, CODEC_MUTE_OFF) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
else
{
/* Update audio out mute status */
Audio_Out_Ctx[Instance].IsMute = 0U;
}
/* Return BSP status */
return ret;
}
/**
* @brief Check whether the MUTE mode is enabled or not
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @param IsMute pointer to mute state
* @retval Mute status
*/
int32_t BSP_AUDIO_OUT_IsMute(uint32_t Instance, uint32_t *IsMute)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}
else if (Audio_Out_Ctx[Instance].State == AUDIO_OUT_STATE_RESET)
{
ret = BSP_ERROR_BUSY;
}
else
{
*IsMute = Audio_Out_Ctx[Instance].IsMute;
}
/* Return BSP status */
return ret;
}
/**
* @brief Switch dynamically (while audio file is played) the output target
* (speaker or headphone).
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @param Device The audio output device
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_SetDevice(uint32_t Instance, uint32_t Device)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State != AUDIO_OUT_STATE_STOP)
{
ret = BSP_ERROR_BUSY;
} /* Call the Codec output device function */
else if (Audio_Drv->SetOutputMode(Audio_CompObj, Device) < 0)
{
ret = BSP_ERROR_COMPONENT_FAILURE;
}
else
{
/* Nothing to do because there is only one device (AUDIO_OUT_HEADPHONE) */
}
/* Return BSP status */
return ret;
}
/**
* @brief Get the Output Device
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @param Device The audio output device
* @retval BSP status
*/
int32_t BSP_AUDIO_OUT_GetDevice(uint32_t Instance, uint32_t *Device)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State == AUDIO_OUT_STATE_RESET)
{
ret = BSP_ERROR_BUSY;
}
else
{
/* Get Audio_Out_Ctx Device */
*Device = Audio_Out_Ctx[Instance].Device;
}
/* Return BSP status */
return ret;
}
/**
* @brief Updates the audio frequency.
* @param Instance : AUDIO OUT Instance. It can only be 0 (SAI)
* @param SampleRate 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 BSP status
*/
int32_t BSP_AUDIO_OUT_SetSampleRate(uint32_t Instance, uint32_t SampleRate)
{
int32_t ret = BSP_ERROR_NONE;
if (Instance >= AUDIO_OUT_INSTANCES_NBR)
{
ret = BSP_ERROR_WRONG_PARAM;
}
/* Check audio out state */
else if (Audio_Out_Ctx[Instance].State != AUDIO_OUT_STATE_STOP)
{
ret = BSP_ERROR_BUSY;