FINAL_AUDIO_RECORD - AudioRecord and FFT/MSE comparison. Call AudioRec…

Senior Design: Sound Monitor » Code » FINAL_AUDIO_RECORD

Senior Design: Sound Monitor / FINAL_AUDIO_RECORD

AudioRecord and FFT/MSE comparison. Call AudioRecord_demo for control record and AudioSample for subsequent recordings.

Dependencies: CMSIS_DSP_401 STM32L4xx_HAL_Driver

Fork of OneHopeOnePrayer by Senior Design: Sound Monitor

stm32l4xx_nucleo_audio.c@5:f6afbd3fc47a, 2015-12-05 (annotated)

Committer:: EricLew
Date:: Sat Dec 05 16:17:25 2015 +0000
Revision:: 5:f6afbd3fc47a

Ported to Nucleo

Who changed what in which revision?

User	Revision	Line number	New contents of line
EricLew	5:f6afbd3fc47a	1	/**
EricLew	5:f6afbd3fc47a	2	******************************************************************************
EricLew	5:f6afbd3fc47a	3	* @file stm32l4xx_nucleo_audio.c
EricLew	5:f6afbd3fc47a	4	* @author MCD Application Team
EricLew	5:f6afbd3fc47a	5	* @version V1.0.1
EricLew	5:f6afbd3fc47a	6	* @date 16-September-2015
EricLew	5:f6afbd3fc47a	7	* @brief This file provides a set of functions needed to manage the
EricLew	5:f6afbd3fc47a	8	* Audio driver for the STM32L476G-Nucleo board.
EricLew	5:f6afbd3fc47a	9	******************************************************************************
EricLew	5:f6afbd3fc47a	10	* @attention
EricLew	5:f6afbd3fc47a	11	*
EricLew	5:f6afbd3fc47a	12	* <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
EricLew	5:f6afbd3fc47a	13	*
EricLew	5:f6afbd3fc47a	14	* Redistribution and use in source and binary forms, with or without modification,
EricLew	5:f6afbd3fc47a	15	* are permitted provided that the following conditions are met:
EricLew	5:f6afbd3fc47a	16	* 1. Redistributions of source code must retain the above copyright notice,
EricLew	5:f6afbd3fc47a	17	* this list of conditions and the following disclaimer.
EricLew	5:f6afbd3fc47a	18	* 2. Redistributions in binary form must reproduce the above copyright notice,
EricLew	5:f6afbd3fc47a	19	* this list of conditions and the following disclaimer in the documentation
EricLew	5:f6afbd3fc47a	20	* and/or other materials provided with the distribution.
EricLew	5:f6afbd3fc47a	21	* 3. Neither the name of STMicroelectronics nor the names of its contributors
EricLew	5:f6afbd3fc47a	22	* may be used to endorse or promote products derived from this software
EricLew	5:f6afbd3fc47a	23	* without specific prior written permission.
EricLew	5:f6afbd3fc47a	24	*
EricLew	5:f6afbd3fc47a	25	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
EricLew	5:f6afbd3fc47a	26	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
EricLew	5:f6afbd3fc47a	27	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
EricLew	5:f6afbd3fc47a	28	* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
EricLew	5:f6afbd3fc47a	29	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
EricLew	5:f6afbd3fc47a	30	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
EricLew	5:f6afbd3fc47a	31	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
EricLew	5:f6afbd3fc47a	32	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
EricLew	5:f6afbd3fc47a	33	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
EricLew	5:f6afbd3fc47a	34	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
EricLew	5:f6afbd3fc47a	35	*
EricLew	5:f6afbd3fc47a	36	******************************************************************************
EricLew	5:f6afbd3fc47a	37	*/
EricLew	5:f6afbd3fc47a	38
EricLew	5:f6afbd3fc47a	39	/*==============================================================================
EricLew	5:f6afbd3fc47a	40	User NOTES
EricLew	5:f6afbd3fc47a	41
EricLew	5:f6afbd3fc47a	42	1. How To use this driver:
EricLew	5:f6afbd3fc47a	43	--------------------------
EricLew	5:f6afbd3fc47a	44	+ This driver supports STM32L4xx devices on STM32L476G-Nucleo (MB1184) Nucleo boards.
EricLew	5:f6afbd3fc47a	45	a) to play an audio file (all functions names start by BSP_AUDIO_OUT_xxx)
EricLew	5:f6afbd3fc47a	46	b) to record an audio file through MP34DT01TR, ST MEMS (all functions names start by BSP_AUDIO_IN_xxx)
EricLew	5:f6afbd3fc47a	47
EricLew	5:f6afbd3fc47a	48	a) PLAY A FILE:
EricLew	5:f6afbd3fc47a	49	==============
EricLew	5:f6afbd3fc47a	50	+ Call the function BSP_AUDIO_OUT_Init(
EricLew	5:f6afbd3fc47a	51	OutputDevice: physical output mode (OUTPUT_DEVICE_SPEAKER,
EricLew	5:f6afbd3fc47a	52	OUTPUT_DEVICE_HEADPHONE or OUTPUT_DEVICE_BOTH)
EricLew	5:f6afbd3fc47a	53	Volume : Initial volume to be set (0 is min (mute), 100 is max (100%)
EricLew	5:f6afbd3fc47a	54	AudioFreq : Audio frequency in Hz (8000, 16000, 22500, 32000...)
EricLew	5:f6afbd3fc47a	55	this parameter is relative to the audio file/stream type.
EricLew	5:f6afbd3fc47a	56	)
EricLew	5:f6afbd3fc47a	57	This function configures all the hardware required for the audio application (codec, I2C, SAI,
EricLew	5:f6afbd3fc47a	58	GPIOs, DMA and interrupt if needed). This function returns AUDIO_OK if configuration is OK.
EricLew	5:f6afbd3fc47a	59	If the returned value is different from AUDIO_OK or the function is stuck then the communication with
EricLew	5:f6afbd3fc47a	60	the audio codec has failed.
EricLew	5:f6afbd3fc47a	61	- OUTPUT_DEVICE_SPEAKER : only speaker will be set as output for the audio stream.
EricLew	5:f6afbd3fc47a	62	- OUTPUT_DEVICE_HEADPHONE: only headphones will be set as output for the audio stream.
EricLew	5:f6afbd3fc47a	63	- OUTPUT_DEVICE_BOTH : both Speaker and Headphone are used as outputs for the audio stream
EricLew	5:f6afbd3fc47a	64	at the same time.
EricLew	5:f6afbd3fc47a	65
EricLew	5:f6afbd3fc47a	66	+ Call the function BSP_AUDIO_OUT_RegisterCallbacks to register user callbacks
EricLew	5:f6afbd3fc47a	67	required to manage audio data streaming towards the audio codec (ErrorCallback(),
EricLew	5:f6afbd3fc47a	68	HalfTransfer_CallBack() and TransferComplete_CallBack()).
EricLew	5:f6afbd3fc47a	69
EricLew	5:f6afbd3fc47a	70	+ Call the function BSP_AUDIO_OUT_Play() to start audio playback (for the first time).
EricLew	5:f6afbd3fc47a	71	+ Call the function BSP_AUDIO_OUT_Pause() to pause audio playabck
EricLew	5:f6afbd3fc47a	72	+ Call the function BSP_AUDIO_OUT_Resume() to resume audio playback.
EricLew	5:f6afbd3fc47a	73	Note. After calling BSP_AUDIO_OUT_Pause() function for pause, only BSP_AUDIO_OUT_Resume() should be called
EricLew	5:f6afbd3fc47a	74	for resume (it is not allowed to call BSP_AUDIO_OUT_Play() in this case).
EricLew	5:f6afbd3fc47a	75	Note. This function should be called only when the audio file is played or paused (not stopped).
EricLew	5:f6afbd3fc47a	76	+ Call the function BSP_AUDIO_OUT_Stop() to stop audio playback.
EricLew	5:f6afbd3fc47a	77	+ To modify the volume level, the sampling frequency, the device output mode,
EricLew	5:f6afbd3fc47a	78	the mute status or the audio configuration or the stop, use the functions: BSP_AUDIO_OUT_SetVolume(),
EricLew	5:f6afbd3fc47a	79	AUDIO_OUT_SetFrequency(), BSP_AUDIO_OUT_SetOutputMode(), BSP_AUDIO_OUT_SetMute()and
EricLew	5:f6afbd3fc47a	80	BSP_AUDIO_OUT_ChangeAudioConfig().
EricLew	5:f6afbd3fc47a	81
EricLew	5:f6afbd3fc47a	82	Driver architecture:
EricLew	5:f6afbd3fc47a	83	--------------------
EricLew	5:f6afbd3fc47a	84	+ This driver provides the audio layer high level API: it consists in functions
EricLew	5:f6afbd3fc47a	85	exported in the stm32l4xx_nucleo_audio.h file (e.g. BSP_AUDIO_OUT_Init(),
EricLew	5:f6afbd3fc47a	86	BSP_AUDIO_OUT_Play(), ...).
EricLew	5:f6afbd3fc47a	87	+ This driver also includes the Media Access Layer (MAL): it consists in
EricLew	5:f6afbd3fc47a	88	functions allowing to access setup the audio devices. These functions
EricLew	5:f6afbd3fc47a	89	are included as local functions into the stm32l4xx_nucleo_audio.c file
EricLew	5:f6afbd3fc47a	90	(e.g. AUDIO_SAIx_Init()).
EricLew	5:f6afbd3fc47a	91
EricLew	5:f6afbd3fc47a	92	Known Limitations:
EricLew	5:f6afbd3fc47a	93	------------------
EricLew	5:f6afbd3fc47a	94	1- Communication with the audio codec (through I2C) may be corrupted if it is interrupted by some
EricLew	5:f6afbd3fc47a	95	user interrupt routines (in this case, interrupts could be disabled just before the start of
EricLew	5:f6afbd3fc47a	96	communication then re-enabled when it is over). Note that this communication is only done at
EricLew	5:f6afbd3fc47a	97	the configuration phase (BSP_AUDIO_OUT_Init() or BSP_AUDIO_OUT_Stop()) and when Volume control modification is
EricLew	5:f6afbd3fc47a	98	performed (BSP_AUDIO_OUT_SetVolume() or BSP_AUDIO_OUT_SetMute()or BSP_AUDIO_OUT_SetOutputMode()).
EricLew	5:f6afbd3fc47a	99	When the audio data is played, no communication is required with the audio codec.
EricLew	5:f6afbd3fc47a	100	2- Parsing of audio file is not implemented (in order to determine audio file properties: Mono/Stereo, Data size,
EricLew	5:f6afbd3fc47a	101	File size, Audio Frequency, Audio Data header size ...). The configuration is fixed for the given audio file.
EricLew	5:f6afbd3fc47a	102	3- Supports only 16-bits audio data size.
EricLew	5:f6afbd3fc47a	103
EricLew	5:f6afbd3fc47a	104	b) RECORD A FILE:
EricLew	5:f6afbd3fc47a	105	================
EricLew	5:f6afbd3fc47a	106	+ Call the function BSP_AUDIO_IN_Init(
EricLew	5:f6afbd3fc47a	107	AudioFreq: Audio frequency in Hz (8000, 16000, 22500, 32000 ...)
EricLew	5:f6afbd3fc47a	108	)
EricLew	5:f6afbd3fc47a	109	This function configures all the hardware required for the audio application (DFSDM,
EricLew	5:f6afbd3fc47a	110	GPIOs, DMA and interrupt if needed). This function returns AUDIO_OK if the
EricLew	5:f6afbd3fc47a	111	configuration completes successfully.
EricLew	5:f6afbd3fc47a	112
EricLew	5:f6afbd3fc47a	113	+ Call the function BSP_AUDIO_IN_RegisterCallbacks to register user callbacks
EricLew	5:f6afbd3fc47a	114	used to stream audio data toward the record buffer (ErrorCallback(),
EricLew	5:f6afbd3fc47a	115	HalfTransfer_CallBack() and TransferComplete_CallBack()).
EricLew	5:f6afbd3fc47a	116
EricLew	5:f6afbd3fc47a	117	+ Call the function BSP_AUDIO_IN_Record(
EricLew	5:f6afbd3fc47a	118	pbuf Main buffer pointer for the recorded data storing
EricLew	5:f6afbd3fc47a	119	size Current size of the recorded buffer
EricLew	5:f6afbd3fc47a	120	)
EricLew	5:f6afbd3fc47a	121	to start recording from the microphone.
EricLew	5:f6afbd3fc47a	122
EricLew	5:f6afbd3fc47a	123	+ Call the function AUDIO_IN_STOP() to stop recording
EricLew	5:f6afbd3fc47a	124	==============================================================================*/
EricLew	5:f6afbd3fc47a	125
EricLew	5:f6afbd3fc47a	126	/* Includes ------------------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	127	#include <string.h>
EricLew	5:f6afbd3fc47a	128	#include "stm32l4xx_nucleo_audio.h"
EricLew	5:f6afbd3fc47a	129
EricLew	5:f6afbd3fc47a	130	/** @addtogroup BSP
EricLew	5:f6afbd3fc47a	131	* @{
EricLew	5:f6afbd3fc47a	132	*/
EricLew	5:f6afbd3fc47a	133
EricLew	5:f6afbd3fc47a	134	/** @addtogroup STM32L476G_NUCLEO
EricLew	5:f6afbd3fc47a	135	* @{
EricLew	5:f6afbd3fc47a	136	*/
EricLew	5:f6afbd3fc47a	137
EricLew	5:f6afbd3fc47a	138	/** @defgroup STM32L476G_NUCLEO_AUDIO STM32L476G-NUCLEO AUDIO
EricLew	5:f6afbd3fc47a	139	* @brief This file includes the low layer driver for cs43l22 Audio Codec
EricLew	5:f6afbd3fc47a	140	* available on STM32L476G-Nucleo board(MB1184).
EricLew	5:f6afbd3fc47a	141	* @{
EricLew	5:f6afbd3fc47a	142	*/
EricLew	5:f6afbd3fc47a	143
EricLew	5:f6afbd3fc47a	144	/* Private typedef -----------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	145	/** @defgroup STM32L476G_NUCLEO_AUDIO_Private_Types Private Types
EricLew	5:f6afbd3fc47a	146	* @{
EricLew	5:f6afbd3fc47a	147	*/
EricLew	5:f6afbd3fc47a	148	//typedef struct
EricLew	5:f6afbd3fc47a	149	//{
EricLew	5:f6afbd3fc47a	150	// AUDIO_DrvTypeDef * AudioDrv; /* Audio codec driver */
EricLew	5:f6afbd3fc47a	151	// Audio_CallbackTypeDef CbError; /* pointer to the callback function invoked when ... */
EricLew	5:f6afbd3fc47a	152	// Audio_CallbackTypeDef CbHalfTransfer; /* pointer to the callback function invoked when ... */
EricLew	5:f6afbd3fc47a	153	// Audio_CallbackTypeDef CbTransferComplete; /* pointer to the callback function invoked when ... */
EricLew	5:f6afbd3fc47a	154	//} AUDIO_OUT_TypeDef;
EricLew	5:f6afbd3fc47a	155
EricLew	5:f6afbd3fc47a	156	typedef struct
EricLew	5:f6afbd3fc47a	157	{
EricLew	5:f6afbd3fc47a	158	DFSDM_Channel_HandleTypeDef hDfsdmLeftChannel; /* DFSDM channel handle used for left channel */
EricLew	5:f6afbd3fc47a	159	DMA_HandleTypeDef hDmaDfsdmLeft; /* DMA handle used for DFSDM regular conversions on left channel */
EricLew	5:f6afbd3fc47a	160	int32_t * LeftRecBuff; /* Buffers for left samples */
EricLew	5:f6afbd3fc47a	161	uint32_t Frequency; /* Record Frequency */
EricLew	5:f6afbd3fc47a	162	uint32_t BitResolution; /* Record bit resolution */
EricLew	5:f6afbd3fc47a	163	uint32_t ChannelNbr; /* Record Channel Number */
EricLew	5:f6afbd3fc47a	164	uint16_t * pRecBuf; /* Pointer to record user buffer */
EricLew	5:f6afbd3fc47a	165	uint32_t RecSize; /* Size to record in mono, double size to record in stereo */
EricLew	5:f6afbd3fc47a	166	Audio_CallbackTypeDef CbError; /* pointer to the callback function invoked when a DMA transfer fails */
EricLew	5:f6afbd3fc47a	167	Audio_CallbackTypeDef CbHalfTransfer; /* pointer to the callback function invoked when half of the DMA transfer is completed */
EricLew	5:f6afbd3fc47a	168	Audio_CallbackTypeDef CbTransferComplete; /* pointer to the callback function invoked when the DMA transfer is completed */
EricLew	5:f6afbd3fc47a	169	} AUDIO_IN_TypeDef;
EricLew	5:f6afbd3fc47a	170
EricLew	5:f6afbd3fc47a	171	/**
EricLew	5:f6afbd3fc47a	172	* @}
EricLew	5:f6afbd3fc47a	173	*/
EricLew	5:f6afbd3fc47a	174
EricLew	5:f6afbd3fc47a	175	/* Private defines ------------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	176	/** @defgroup STM32L476G_NUCLEO_AUDIO_Private_Constants Private Constants
EricLew	5:f6afbd3fc47a	177	* @{
EricLew	5:f6afbd3fc47a	178	*/
EricLew	5:f6afbd3fc47a	179	/**
EricLew	5:f6afbd3fc47a	180	* @}
EricLew	5:f6afbd3fc47a	181	*/
EricLew	5:f6afbd3fc47a	182
EricLew	5:f6afbd3fc47a	183	/* Private macros ------------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	184	/** @defgroup STM32L476G_NUCLEO_AUDIO_Private_Macros Private Macros
EricLew	5:f6afbd3fc47a	185	* @{
EricLew	5:f6afbd3fc47a	186	*/
EricLew	5:f6afbd3fc47a	187	/### PLAY ###/
EricLew	5:f6afbd3fc47a	188	/* SCK(kHz) = SAI_CK_x/(SAIClockDivider2256) */
EricLew	5:f6afbd3fc47a	189	#define SAIClockDivider(__FREQUENCY__) \
EricLew	5:f6afbd3fc47a	190	(__FREQUENCY__ == AUDIO_FREQUENCY_8K) ? 12 \
EricLew	5:f6afbd3fc47a	191	: (__FREQUENCY__ == AUDIO_FREQUENCY_11K) ? 2 \
EricLew	5:f6afbd3fc47a	192	: (__FREQUENCY__ == AUDIO_FREQUENCY_16K) ? 6 \
EricLew	5:f6afbd3fc47a	193	: (__FREQUENCY__ == AUDIO_FREQUENCY_22K) ? 1 \
EricLew	5:f6afbd3fc47a	194	: (__FREQUENCY__ == AUDIO_FREQUENCY_32K) ? 3 \
EricLew	5:f6afbd3fc47a	195	: (__FREQUENCY__ == AUDIO_FREQUENCY_44K) ? 0 \
EricLew	5:f6afbd3fc47a	196	: (__FREQUENCY__ == AUDIO_FREQUENCY_48K) ? 2 : 1 \
EricLew	5:f6afbd3fc47a	197
EricLew	5:f6afbd3fc47a	198	/### RECORD ###/
EricLew	5:f6afbd3fc47a	199	#define DFSDMOverSampling(__FREQUENCY__) \
EricLew	5:f6afbd3fc47a	200	(__FREQUENCY__ == AUDIO_FREQUENCY_8K) ? 256 \
EricLew	5:f6afbd3fc47a	201	: (__FREQUENCY__ == AUDIO_FREQUENCY_11K) ? 256 \
EricLew	5:f6afbd3fc47a	202	: (__FREQUENCY__ == AUDIO_FREQUENCY_16K) ? 128 \
EricLew	5:f6afbd3fc47a	203	: (__FREQUENCY__ == AUDIO_FREQUENCY_22K) ? 128 \
EricLew	5:f6afbd3fc47a	204	: (__FREQUENCY__ == AUDIO_FREQUENCY_32K) ? 64 \
EricLew	5:f6afbd3fc47a	205	: (__FREQUENCY__ == AUDIO_FREQUENCY_44K) ? 64 \
EricLew	5:f6afbd3fc47a	206	: (__FREQUENCY__ == AUDIO_FREQUENCY_48K) ? 32 : 16 \
EricLew	5:f6afbd3fc47a	207
EricLew	5:f6afbd3fc47a	208	#define DFSDMClockDivider(__FREQUENCY__) \
EricLew	5:f6afbd3fc47a	209	(__FREQUENCY__ == AUDIO_FREQUENCY_8K) ? 24 \
EricLew	5:f6afbd3fc47a	210	: (__FREQUENCY__ == AUDIO_FREQUENCY_11K) ? 4 \
EricLew	5:f6afbd3fc47a	211	: (__FREQUENCY__ == AUDIO_FREQUENCY_16K) ? 24 \
EricLew	5:f6afbd3fc47a	212	: (__FREQUENCY__ == AUDIO_FREQUENCY_22K) ? 4 \
EricLew	5:f6afbd3fc47a	213	: (__FREQUENCY__ == AUDIO_FREQUENCY_32K) ? 24 \
EricLew	5:f6afbd3fc47a	214	: (__FREQUENCY__ == AUDIO_FREQUENCY_44K) ? 4 \
EricLew	5:f6afbd3fc47a	215	: (__FREQUENCY__ == AUDIO_FREQUENCY_48K) ? 32 : 32 \
EricLew	5:f6afbd3fc47a	216
EricLew	5:f6afbd3fc47a	217	#define DFSDMFilterOrder(__FREQUENCY__) \
EricLew	5:f6afbd3fc47a	218	(__FREQUENCY__ == AUDIO_FREQUENCY_8K) ? DFSDM_FILTER_SINC3_ORDER \
EricLew	5:f6afbd3fc47a	219	: (__FREQUENCY__ == AUDIO_FREQUENCY_11K) ? DFSDM_FILTER_SINC3_ORDER \
EricLew	5:f6afbd3fc47a	220	: (__FREQUENCY__ == AUDIO_FREQUENCY_16K) ? DFSDM_FILTER_SINC3_ORDER \
EricLew	5:f6afbd3fc47a	221	: (__FREQUENCY__ == AUDIO_FREQUENCY_22K) ? DFSDM_FILTER_SINC3_ORDER \
EricLew	5:f6afbd3fc47a	222	: (__FREQUENCY__ == AUDIO_FREQUENCY_32K) ? DFSDM_FILTER_SINC4_ORDER \
EricLew	5:f6afbd3fc47a	223	: (__FREQUENCY__ == AUDIO_FREQUENCY_44K) ? DFSDM_FILTER_SINC4_ORDER \
EricLew	5:f6afbd3fc47a	224	: (__FREQUENCY__ == AUDIO_FREQUENCY_48K) ? DFSDM_FILTER_SINC4_ORDER : DFSDM_FILTER_SINC5_ORDER \
EricLew	5:f6afbd3fc47a	225
EricLew	5:f6afbd3fc47a	226	#define DFSDMRightBitShift(__FREQUENCY__) \
EricLew	5:f6afbd3fc47a	227	(__FREQUENCY__ == AUDIO_FREQUENCY_8K) ? 2 \
EricLew	5:f6afbd3fc47a	228	: (__FREQUENCY__ == AUDIO_FREQUENCY_11K) ? 3 \
EricLew	5:f6afbd3fc47a	229	: (__FREQUENCY__ == AUDIO_FREQUENCY_16K) ? 3 \
EricLew	5:f6afbd3fc47a	230	: (__FREQUENCY__ == AUDIO_FREQUENCY_22K) ? 0 \
EricLew	5:f6afbd3fc47a	231	: (__FREQUENCY__ == AUDIO_FREQUENCY_32K) ? 3 \
EricLew	5:f6afbd3fc47a	232	: (__FREQUENCY__ == AUDIO_FREQUENCY_44K) ? 3 \
EricLew	5:f6afbd3fc47a	233	: (__FREQUENCY__ == AUDIO_FREQUENCY_48K) ? 7 : 0 \
EricLew	5:f6afbd3fc47a	234
EricLew	5:f6afbd3fc47a	235	/* Saturate the record PCM sample */
EricLew	5:f6afbd3fc47a	236	#define SaturaLH(N, L, H) (((N)<(L))?(L):(((N)>(H))?(H):(N)))
EricLew	5:f6afbd3fc47a	237
EricLew	5:f6afbd3fc47a	238	/**
EricLew	5:f6afbd3fc47a	239	* @}
EricLew	5:f6afbd3fc47a	240	*/
EricLew	5:f6afbd3fc47a	241
EricLew	5:f6afbd3fc47a	242	/* Private variables ---------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	243	/** @defgroup STM32L476G_NUCLEO_AUDIO_Private_Variables Private Variables
EricLew	5:f6afbd3fc47a	244	* @{
EricLew	5:f6afbd3fc47a	245	*/
EricLew	5:f6afbd3fc47a	246	/* Audio output context information */
EricLew	5:f6afbd3fc47a	247	//static AUDIO_OUT_TypeDef hAudioOut;
EricLew	5:f6afbd3fc47a	248
EricLew	5:f6afbd3fc47a	249	/* Audio input context information */
EricLew	5:f6afbd3fc47a	250	static AUDIO_IN_TypeDef hAudioIn;
EricLew	5:f6afbd3fc47a	251
EricLew	5:f6afbd3fc47a	252	/* SAI DMA handle */
EricLew	5:f6afbd3fc47a	253	static DMA_HandleTypeDef hDmaSai;
EricLew	5:f6afbd3fc47a	254	/**
EricLew	5:f6afbd3fc47a	255	* @}
EricLew	5:f6afbd3fc47a	256	*/
EricLew	5:f6afbd3fc47a	257
EricLew	5:f6afbd3fc47a	258	/* Exported variables ---------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	259	/** @defgroup STM32L476G_NUCLEO_AUDIO_Exported_Variables Exported Variables
EricLew	5:f6afbd3fc47a	260	* @{
EricLew	5:f6afbd3fc47a	261	*/
EricLew	5:f6afbd3fc47a	262	/* SAIx handle */
EricLew	5:f6afbd3fc47a	263	SAI_HandleTypeDef BSP_AUDIO_hSai;
EricLew	5:f6afbd3fc47a	264
EricLew	5:f6afbd3fc47a	265	/* DFSDM filter handle */
EricLew	5:f6afbd3fc47a	266	DFSDM_Filter_HandleTypeDef BSP_AUDIO_hDfsdmLeftFilter;
EricLew	5:f6afbd3fc47a	267	/**
EricLew	5:f6afbd3fc47a	268	* @}
EricLew	5:f6afbd3fc47a	269	*/
EricLew	5:f6afbd3fc47a	270
EricLew	5:f6afbd3fc47a	271	/* Private function prototypes -----------------------------------------------*/
EricLew	5:f6afbd3fc47a	272	/** @defgroup STM32L476G_NUCLEO_AUDIO_Private_Functions Private Functions
EricLew	5:f6afbd3fc47a	273	* @{
EricLew	5:f6afbd3fc47a	274	*/
EricLew	5:f6afbd3fc47a	275	//static void AUDIO_CODEC_Reset(void);
EricLew	5:f6afbd3fc47a	276	//static uint8_t AUDIO_SAIx_Init(uint32_t AudioFreq);
EricLew	5:f6afbd3fc47a	277	//static uint8_t AUDIO_SAIx_DeInit(void);
EricLew	5:f6afbd3fc47a	278	static uint8_t AUDIO_DFSDMx_Init(uint32_t AudioFreq);
EricLew	5:f6afbd3fc47a	279	static uint8_t AUDIO_DFSDMx_DeInit(void);
EricLew	5:f6afbd3fc47a	280	static uint8_t AUDIO_SAIPLLConfig(uint32_t AudioFreq);
EricLew	5:f6afbd3fc47a	281	/**
EricLew	5:f6afbd3fc47a	282	* @}
EricLew	5:f6afbd3fc47a	283	*/
EricLew	5:f6afbd3fc47a	284
EricLew	5:f6afbd3fc47a	285	/* Exported functions --------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	286	/** @addtogroup STM32L476G_NUCLEO_AUDIO_Exported_Functions
EricLew	5:f6afbd3fc47a	287	* @{
EricLew	5:f6afbd3fc47a	288	*/
EricLew	5:f6afbd3fc47a	289
EricLew	5:f6afbd3fc47a	290	/**
EricLew	5:f6afbd3fc47a	291	* @brief Configures the audio codec related peripherals.
EricLew	5:f6afbd3fc47a	292	* @param OutputDevice: OUTPUT_DEVICE_SPEAKER, OUTPUT_DEVICE_HEADPHONE,
EricLew	5:f6afbd3fc47a	293	* or OUTPUT_DEVICE_BOTH.
EricLew	5:f6afbd3fc47a	294	* @param Volume: Initial volume level (from 0 (Mute) to 100 (Max))
EricLew	5:f6afbd3fc47a	295	* @param AudioFreq: Audio frequency used to play the audio stream.ion.
EricLew	5:f6afbd3fc47a	296	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	297	* @note The SAI PLL input clock must be configure in the user application.
EricLew	5:f6afbd3fc47a	298	* The SAI PLL configuration done within this function assumes that
EricLew	5:f6afbd3fc47a	299	* the SAI PLL input clock runs at 8 MHz.
EricLew	5:f6afbd3fc47a	300	*/
EricLew	5:f6afbd3fc47a	301	//uint8_t BSP_AUDIO_OUT_Init(uint16_t OutputDevice,
EricLew	5:f6afbd3fc47a	302	// uint8_t Volume,
EricLew	5:f6afbd3fc47a	303	// uint32_t AudioFreq)
EricLew	5:f6afbd3fc47a	304	//{
EricLew	5:f6afbd3fc47a	305	// /* Initialize the audio output context */
EricLew	5:f6afbd3fc47a	306	// hAudioOut.AudioDrv = &cs43l22_drv;
EricLew	5:f6afbd3fc47a	307	// hAudioOut.CbError = (Audio_CallbackTypeDef)NULL;
EricLew	5:f6afbd3fc47a	308	// hAudioOut.CbHalfTransfer = (Audio_CallbackTypeDef)NULL;
EricLew	5:f6afbd3fc47a	309	// hAudioOut.CbTransferComplete = (Audio_CallbackTypeDef)NULL;
EricLew	5:f6afbd3fc47a	310	//
EricLew	5:f6afbd3fc47a	311	// /* Configure the SAI PLL according to the requested audio frequency */
EricLew	5:f6afbd3fc47a	312	// if (AUDIO_SAIPLLConfig(AudioFreq) != AUDIO_OK)
EricLew	5:f6afbd3fc47a	313	// {
EricLew	5:f6afbd3fc47a	314	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	315	// }
EricLew	5:f6afbd3fc47a	316	//
EricLew	5:f6afbd3fc47a	317	// /* SAI data transfer preparation: prepare the Media to be used for the audio
EricLew	5:f6afbd3fc47a	318	// transfer from memory to SAI peripheral. */
EricLew	5:f6afbd3fc47a	319	// if (AUDIO_SAIx_Init(AudioFreq) != AUDIO_OK)
EricLew	5:f6afbd3fc47a	320	// {
EricLew	5:f6afbd3fc47a	321	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	322	// }
EricLew	5:f6afbd3fc47a	323	//
EricLew	5:f6afbd3fc47a	324	// /* Retieve audio codec identifier */
EricLew	5:f6afbd3fc47a	325	// if (cs43l22_drv.ReadID(AUDIO_I2C_ADDRESS) != CS43L22_ID)
EricLew	5:f6afbd3fc47a	326	// {
EricLew	5:f6afbd3fc47a	327	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	328	// }
EricLew	5:f6afbd3fc47a	329	//
EricLew	5:f6afbd3fc47a	330	// /* Reset the audio codec Registers */
EricLew	5:f6afbd3fc47a	331	// AUDIO_CODEC_Reset();
EricLew	5:f6afbd3fc47a	332	//
EricLew	5:f6afbd3fc47a	333	// /* Initialize the audio codec internal registers */
EricLew	5:f6afbd3fc47a	334	// if (hAudioOut.AudioDrv->Init(AUDIO_I2C_ADDRESS,
EricLew	5:f6afbd3fc47a	335	// OutputDevice,
EricLew	5:f6afbd3fc47a	336	// Volume,
EricLew	5:f6afbd3fc47a	337	// AudioFreq) != 0)
EricLew	5:f6afbd3fc47a	338	// {
EricLew	5:f6afbd3fc47a	339	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	340	// }
EricLew	5:f6afbd3fc47a	341	//
EricLew	5:f6afbd3fc47a	342	// /* Set the requested volume */
EricLew	5:f6afbd3fc47a	343	// BSP_AUDIO_OUT_SetVolume(Volume);
EricLew	5:f6afbd3fc47a	344	//
EricLew	5:f6afbd3fc47a	345	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	346	//}
EricLew	5:f6afbd3fc47a	347
EricLew	5:f6afbd3fc47a	348	/**
EricLew	5:f6afbd3fc47a	349	* @brief De-Initializes audio codec related peripherals
EricLew	5:f6afbd3fc47a	350	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	351
EricLew	5:f6afbd3fc47a	352	*/
EricLew	5:f6afbd3fc47a	353	//uint8_t BSP_AUDIO_OUT_DeInit(void)
EricLew	5:f6afbd3fc47a	354	//{
EricLew	5:f6afbd3fc47a	355	// /* De-initializes the Audio Codec audio interface */
EricLew	5:f6afbd3fc47a	356	// if (AUDIO_SAIx_DeInit() != AUDIO_OK)
EricLew	5:f6afbd3fc47a	357	// {
EricLew	5:f6afbd3fc47a	358	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	359	// }
EricLew	5:f6afbd3fc47a	360	//
EricLew	5:f6afbd3fc47a	361	// /* DeInit Audio component interface */
EricLew	5:f6afbd3fc47a	362	// hAudioOut.AudioDrv->DeInit();
EricLew	5:f6afbd3fc47a	363	//
EricLew	5:f6afbd3fc47a	364	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	365	//}
EricLew	5:f6afbd3fc47a	366
EricLew	5:f6afbd3fc47a	367	/**
EricLew	5:f6afbd3fc47a	368	* @brief Starts playing audio stream from a data buffer for a determined size.
EricLew	5:f6afbd3fc47a	369	* @param pData: pointer on PCM samples buffer
EricLew	5:f6afbd3fc47a	370	* @param Size: Number of audio data BYTES.
EricLew	5:f6afbd3fc47a	371	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	372	*/
EricLew	5:f6afbd3fc47a	373	//uint8_t BSP_AUDIO_OUT_Play(uint16_t* pData, uint32_t Size)
EricLew	5:f6afbd3fc47a	374	//{
EricLew	5:f6afbd3fc47a	375	// /* Initiate a DMA transfer of PCM samples towards the serial audio interface */
EricLew	5:f6afbd3fc47a	376	// if (HAL_SAI_Transmit_DMA(&BSP_AUDIO_hSai, (uint8_t *)pData, DMA_MAX(Size))!= HAL_OK)
EricLew	5:f6afbd3fc47a	377	// {
EricLew	5:f6afbd3fc47a	378	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	379	// }
EricLew	5:f6afbd3fc47a	380	//
EricLew	5:f6afbd3fc47a	381	// /* Call the audio Codec Play function */
EricLew	5:f6afbd3fc47a	382	// if (hAudioOut.AudioDrv->Play(AUDIO_I2C_ADDRESS, pData, Size) != 0)
EricLew	5:f6afbd3fc47a	383	// {
EricLew	5:f6afbd3fc47a	384	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	385	// }
EricLew	5:f6afbd3fc47a	386	//
EricLew	5:f6afbd3fc47a	387	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	388	// }
EricLew	5:f6afbd3fc47a	389
EricLew	5:f6afbd3fc47a	390	/**
EricLew	5:f6afbd3fc47a	391	* @brief Sends n-Bytes on the SAI interface.
EricLew	5:f6afbd3fc47a	392	* @param pData: pointer on PCM samples buffer
EricLew	5:f6afbd3fc47a	393	* @param Size: number of data to be written
EricLew	5:f6afbd3fc47a	394	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	395	*/
EricLew	5:f6afbd3fc47a	396	//uint8_t BSP_AUDIO_OUT_ChangeBuffer(uint16_t *pData, uint16_t Size)
EricLew	5:f6afbd3fc47a	397	//{
EricLew	5:f6afbd3fc47a	398	// /* Initiate a DMA transfer of PCM samples towards the serial audio interface */
EricLew	5:f6afbd3fc47a	399	// if (HAL_SAI_Transmit_DMA(&BSP_AUDIO_hSai, (uint8_t *)pData, Size)!= HAL_OK)
EricLew	5:f6afbd3fc47a	400	// {
EricLew	5:f6afbd3fc47a	401	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	402	// }
EricLew	5:f6afbd3fc47a	403	//
EricLew	5:f6afbd3fc47a	404	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	405	//}
EricLew	5:f6afbd3fc47a	406
EricLew	5:f6afbd3fc47a	407	/**
EricLew	5:f6afbd3fc47a	408	* @brief This function Pauses the audio file stream. In case
EricLew	5:f6afbd3fc47a	409	* of using DMA, the DMA Pause feature is used.
EricLew	5:f6afbd3fc47a	410	* @note When calling BSP_AUDIO_OUT_Pause() function for pause, only
EricLew	5:f6afbd3fc47a	411	* BSP_AUDIO_OUT_Resume() function should be called for resume
EricLew	5:f6afbd3fc47a	412	* (use of BSP_AUDIO_OUT_Play() function for resume could lead
EricLew	5:f6afbd3fc47a	413	* to unexpected behavior).
EricLew	5:f6afbd3fc47a	414	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	415	*/
EricLew	5:f6afbd3fc47a	416	//uint8_t BSP_AUDIO_OUT_Pause(void)
EricLew	5:f6afbd3fc47a	417	//{
EricLew	5:f6afbd3fc47a	418	// /* Call the Audio Codec Pause function */
EricLew	5:f6afbd3fc47a	419	// if (hAudioOut.AudioDrv->Pause(AUDIO_I2C_ADDRESS) != 0)
EricLew	5:f6afbd3fc47a	420	// {
EricLew	5:f6afbd3fc47a	421	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	422	// }
EricLew	5:f6afbd3fc47a	423	//
EricLew	5:f6afbd3fc47a	424	// /* Pause DMA transfer of PCM samples towards the serial audio interface */
EricLew	5:f6afbd3fc47a	425	// if (HAL_SAI_DMAPause(&BSP_AUDIO_hSai)!= HAL_OK)
EricLew	5:f6afbd3fc47a	426	// {
EricLew	5:f6afbd3fc47a	427	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	428	// }
EricLew	5:f6afbd3fc47a	429	//
EricLew	5:f6afbd3fc47a	430	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	431	//}
EricLew	5:f6afbd3fc47a	432
EricLew	5:f6afbd3fc47a	433	/**
EricLew	5:f6afbd3fc47a	434	* @brief This function Resumes the audio file stream.
EricLew	5:f6afbd3fc47a	435	* @note When calling BSP_AUDIO_OUT_Pause() function for pause, only
EricLew	5:f6afbd3fc47a	436	* BSP_AUDIO_OUT_Resume() function should be called for resume
EricLew	5:f6afbd3fc47a	437	* (use of BSP_AUDIO_OUT_Play() function for resume could lead to
EricLew	5:f6afbd3fc47a	438	* unexpected behavior).
EricLew	5:f6afbd3fc47a	439	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	440	*/
EricLew	5:f6afbd3fc47a	441	//uint8_t BSP_AUDIO_OUT_Resume(void)
EricLew	5:f6afbd3fc47a	442	//{
EricLew	5:f6afbd3fc47a	443	// /* Call the Audio Codec Resume function */
EricLew	5:f6afbd3fc47a	444	// if (hAudioOut.AudioDrv->Resume(AUDIO_I2C_ADDRESS) != 0)
EricLew	5:f6afbd3fc47a	445	// {
EricLew	5:f6afbd3fc47a	446	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	447	// }
EricLew	5:f6afbd3fc47a	448	//
EricLew	5:f6afbd3fc47a	449	// /* Resume DMA transfer of PCM samples towards the serial audio interface */
EricLew	5:f6afbd3fc47a	450	// if (HAL_SAI_DMAResume(&BSP_AUDIO_hSai)!= HAL_OK)
EricLew	5:f6afbd3fc47a	451	// {
EricLew	5:f6afbd3fc47a	452	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	453	// }
EricLew	5:f6afbd3fc47a	454	//
EricLew	5:f6afbd3fc47a	455	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	456	//}
EricLew	5:f6afbd3fc47a	457
EricLew	5:f6afbd3fc47a	458	/**
EricLew	5:f6afbd3fc47a	459	* @brief Stops audio playing and Power down the Audio Codec.
EricLew	5:f6afbd3fc47a	460	* @param Option: could be one of the following parameters
EricLew	5:f6afbd3fc47a	461	* - CODEC_PDWN_SW: for software power off (by writing registers).
EricLew	5:f6afbd3fc47a	462	* Then no need to reconfigure the Codec after power on.
EricLew	5:f6afbd3fc47a	463	* - CODEC_PDWN_HW: completely shut down the codec (physically).
EricLew	5:f6afbd3fc47a	464	* Then need to reconfigure the Codec after power on.
EricLew	5:f6afbd3fc47a	465	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	466	*/
EricLew	5:f6afbd3fc47a	467	//uint8_t BSP_AUDIO_OUT_Stop(uint32_t Option)
EricLew	5:f6afbd3fc47a	468	//{
EricLew	5:f6afbd3fc47a	469	// /* Call Audio Codec Stop function */
EricLew	5:f6afbd3fc47a	470	// if (hAudioOut.AudioDrv->Stop(AUDIO_I2C_ADDRESS, Option) != 0)
EricLew	5:f6afbd3fc47a	471	// {
EricLew	5:f6afbd3fc47a	472	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	473	// }
EricLew	5:f6afbd3fc47a	474	//
EricLew	5:f6afbd3fc47a	475	// if(Option == CODEC_PDWN_HW)
EricLew	5:f6afbd3fc47a	476	// {
EricLew	5:f6afbd3fc47a	477	// /* Wait at least 100us */
EricLew	5:f6afbd3fc47a	478	// HAL_Delay(1);
EricLew	5:f6afbd3fc47a	479	// }
EricLew	5:f6afbd3fc47a	480	//
EricLew	5:f6afbd3fc47a	481	// /* Stop DMA transfer of PCM samples towards the serial audio interface */
EricLew	5:f6afbd3fc47a	482	// if (HAL_SAI_DMAStop(&BSP_AUDIO_hSai)!= HAL_OK)
EricLew	5:f6afbd3fc47a	483	// {
EricLew	5:f6afbd3fc47a	484	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	485	// }
EricLew	5:f6afbd3fc47a	486	//
EricLew	5:f6afbd3fc47a	487	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	488	//}
EricLew	5:f6afbd3fc47a	489
EricLew	5:f6afbd3fc47a	490	/**
EricLew	5:f6afbd3fc47a	491	* @brief Controls the current audio volume level.
EricLew	5:f6afbd3fc47a	492	* @param Volume: Volume level to be set in percentage from 0% to 100% (0 for
EricLew	5:f6afbd3fc47a	493	* Mute and 100 for Max volume level).
EricLew	5:f6afbd3fc47a	494	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	495	*/
EricLew	5:f6afbd3fc47a	496	//uint8_t BSP_AUDIO_OUT_SetVolume(uint8_t Volume)
EricLew	5:f6afbd3fc47a	497	//{
EricLew	5:f6afbd3fc47a	498	// /* Call the codec volume control function with converted volume value */
EricLew	5:f6afbd3fc47a	499	// if (hAudioOut.AudioDrv->SetVolume(AUDIO_I2C_ADDRESS, Volume) != 0)
EricLew	5:f6afbd3fc47a	500	// {
EricLew	5:f6afbd3fc47a	501	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	502	// }
EricLew	5:f6afbd3fc47a	503	//
EricLew	5:f6afbd3fc47a	504	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	505	//}
EricLew	5:f6afbd3fc47a	506
EricLew	5:f6afbd3fc47a	507	/**
EricLew	5:f6afbd3fc47a	508	* @brief Enables or disables the MUTE mode by software
EricLew	5:f6afbd3fc47a	509	* @param Cmd: Could be AUDIO_MUTE_ON to mute sound or AUDIO_MUTE_OFF to
EricLew	5:f6afbd3fc47a	510	* unmute the codec and restore previous volume level.
EricLew	5:f6afbd3fc47a	511	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	512	*/
EricLew	5:f6afbd3fc47a	513	//uint8_t BSP_AUDIO_OUT_SetMute(uint32_t Cmd)
EricLew	5:f6afbd3fc47a	514	//{
EricLew	5:f6afbd3fc47a	515	// /* Call the Codec Mute function */
EricLew	5:f6afbd3fc47a	516	// if (hAudioOut.AudioDrv->SetMute(AUDIO_I2C_ADDRESS, Cmd) != 0)
EricLew	5:f6afbd3fc47a	517	// {
EricLew	5:f6afbd3fc47a	518	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	519	// }
EricLew	5:f6afbd3fc47a	520	//
EricLew	5:f6afbd3fc47a	521	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	522	//}
EricLew	5:f6afbd3fc47a	523
EricLew	5:f6afbd3fc47a	524	/**
EricLew	5:f6afbd3fc47a	525	* @brief Switch dynamically (while audio file is being played) the output
EricLew	5:f6afbd3fc47a	526	* target (speaker or headphone).
EricLew	5:f6afbd3fc47a	527	* @param Output: The audio output target: OUTPUT_DEVICE_SPEAKER,
EricLew	5:f6afbd3fc47a	528	* OUTPUT_DEVICE_HEADPHONE or OUTPUT_DEVICE_BOTH
EricLew	5:f6afbd3fc47a	529	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	530	*/
EricLew	5:f6afbd3fc47a	531	//uint8_t BSP_AUDIO_OUT_SetOutputMode(uint8_t Output)
EricLew	5:f6afbd3fc47a	532	//{
EricLew	5:f6afbd3fc47a	533	// /* Call the Codec output device function */
EricLew	5:f6afbd3fc47a	534	// if (hAudioOut.AudioDrv->SetOutputMode(AUDIO_I2C_ADDRESS, Output) != 0)
EricLew	5:f6afbd3fc47a	535	// {
EricLew	5:f6afbd3fc47a	536	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	537	// }
EricLew	5:f6afbd3fc47a	538	//
EricLew	5:f6afbd3fc47a	539	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	540	//}
EricLew	5:f6afbd3fc47a	541
EricLew	5:f6afbd3fc47a	542	/**
EricLew	5:f6afbd3fc47a	543	* @brief Updates the audio frequency.
EricLew	5:f6afbd3fc47a	544	* @param AudioFreq: Audio frequency used to play the audio stream.
EricLew	5:f6afbd3fc47a	545	* @note The SAI PLL input clock must be configure in the user application.
EricLew	5:f6afbd3fc47a	546	* The SAI PLL configuration done within this function assumes that
EricLew	5:f6afbd3fc47a	547	* the SAI PLL input clock runs at 8 MHz.
EricLew	5:f6afbd3fc47a	548	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	549	*/
EricLew	5:f6afbd3fc47a	550	//uint8_t BSP_AUDIO_OUT_SetFrequency(uint32_t AudioFreq)
EricLew	5:f6afbd3fc47a	551	//{
EricLew	5:f6afbd3fc47a	552	// /* Configure the SAI PLL according to the requested audio frequency */
EricLew	5:f6afbd3fc47a	553	// if (AUDIO_SAIPLLConfig(AudioFreq) != AUDIO_OK)
EricLew	5:f6afbd3fc47a	554	// {
EricLew	5:f6afbd3fc47a	555	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	556	// }
EricLew	5:f6afbd3fc47a	557	//
EricLew	5:f6afbd3fc47a	558	// /* Disable SAI peripheral to allow access to SAI internal registers */
EricLew	5:f6afbd3fc47a	559	// __HAL_SAI_DISABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	560	//
EricLew	5:f6afbd3fc47a	561	// /* Update the SAI audio frequency configuration */
EricLew	5:f6afbd3fc47a	562	// BSP_AUDIO_hSai.Init.Mckdiv = SAIClockDivider(AudioFreq);
EricLew	5:f6afbd3fc47a	563	// HAL_SAI_Init(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	564	//
EricLew	5:f6afbd3fc47a	565	// /* Enable SAI peripheral to generate MCLK */
EricLew	5:f6afbd3fc47a	566	// __HAL_SAI_ENABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	567	//
EricLew	5:f6afbd3fc47a	568	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	569	//}
EricLew	5:f6afbd3fc47a	570
EricLew	5:f6afbd3fc47a	571	/**
EricLew	5:f6afbd3fc47a	572	* @brief Changes the Audio Out Configuration.
EricLew	5:f6afbd3fc47a	573	* @param AudioOutOption: specifies the audio out new configuration
EricLew	5:f6afbd3fc47a	574	* This parameter can be any value of @ref BSP_Audio_Out_Option
EricLew	5:f6afbd3fc47a	575	* @note This API should be called after the BSP_AUDIO_OUT_Init() to adjust the
EricLew	5:f6afbd3fc47a	576	* audio out configuration.
EricLew	5:f6afbd3fc47a	577	* @retval None
EricLew	5:f6afbd3fc47a	578	*/
EricLew	5:f6afbd3fc47a	579	//void BSP_AUDIO_OUT_ChangeAudioConfig(uint32_t AudioOutOption)
EricLew	5:f6afbd3fc47a	580	//{
EricLew	5:f6afbd3fc47a	581	// /******** Playback Buffer circular/normal mode ********/
EricLew	5:f6afbd3fc47a	582	// if(AudioOutOption & BSP_AUDIO_OUT_CIRCULARMODE)
EricLew	5:f6afbd3fc47a	583	// {
EricLew	5:f6afbd3fc47a	584	// /* Deinitialize the Stream to update DMA mode */
EricLew	5:f6afbd3fc47a	585	// HAL_DMA_DeInit(BSP_AUDIO_hSai.hdmatx);
EricLew	5:f6afbd3fc47a	586	//
EricLew	5:f6afbd3fc47a	587	// /* Update the SAI audio Transfer DMA mode */
EricLew	5:f6afbd3fc47a	588	// BSP_AUDIO_hSai.hdmatx->Init.Mode = DMA_CIRCULAR;
EricLew	5:f6afbd3fc47a	589	//
EricLew	5:f6afbd3fc47a	590	// /* Configure the DMA Stream with new Transfer DMA mode */
EricLew	5:f6afbd3fc47a	591	// HAL_DMA_Init(BSP_AUDIO_hSai.hdmatx);
EricLew	5:f6afbd3fc47a	592	// }
EricLew	5:f6afbd3fc47a	593	// else /* BSP_AUDIO_OUT_NORMALMODE */
EricLew	5:f6afbd3fc47a	594	// {
EricLew	5:f6afbd3fc47a	595	// /* Deinitialize the Stream to update DMA mode */
EricLew	5:f6afbd3fc47a	596	// HAL_DMA_DeInit(BSP_AUDIO_hSai.hdmatx);
EricLew	5:f6afbd3fc47a	597	//
EricLew	5:f6afbd3fc47a	598	// /* Update the SAI audio Transfer DMA mode */
EricLew	5:f6afbd3fc47a	599	// BSP_AUDIO_hSai.hdmatx->Init.Mode = DMA_NORMAL;
EricLew	5:f6afbd3fc47a	600	//
EricLew	5:f6afbd3fc47a	601	// /* Configure the DMA Stream with new Transfer DMA mode */
EricLew	5:f6afbd3fc47a	602	// HAL_DMA_Init(BSP_AUDIO_hSai.hdmatx);
EricLew	5:f6afbd3fc47a	603	// }
EricLew	5:f6afbd3fc47a	604	//
EricLew	5:f6afbd3fc47a	605	// /******** Playback Buffer stereo/mono mode ********/
EricLew	5:f6afbd3fc47a	606	// if(AudioOutOption & BSP_AUDIO_OUT_STEREOMODE)
EricLew	5:f6afbd3fc47a	607	// {
EricLew	5:f6afbd3fc47a	608	// /* Disable SAI peripheral to allow access to SAI internal registers */
EricLew	5:f6afbd3fc47a	609	// __HAL_SAI_DISABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	610	//
EricLew	5:f6afbd3fc47a	611	// /* Update the SAI audio frame slot configuration */
EricLew	5:f6afbd3fc47a	612	// BSP_AUDIO_hSai.Init.MonoStereoMode = SAI_STEREOMODE;
EricLew	5:f6afbd3fc47a	613	// HAL_SAI_Init(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	614	//
EricLew	5:f6afbd3fc47a	615	// /* Enable SAI peripheral to generate MCLK */
EricLew	5:f6afbd3fc47a	616	// __HAL_SAI_ENABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	617	// }
EricLew	5:f6afbd3fc47a	618	// else /* BSP_AUDIO_OUT_MONOMODE */
EricLew	5:f6afbd3fc47a	619	// {
EricLew	5:f6afbd3fc47a	620	// /* Disable SAI peripheral to allow access to SAI internal registers */
EricLew	5:f6afbd3fc47a	621	// __HAL_SAI_DISABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	622	//
EricLew	5:f6afbd3fc47a	623	// /* Update the SAI audio frame slot configuration */
EricLew	5:f6afbd3fc47a	624	// BSP_AUDIO_hSai.Init.MonoStereoMode = SAI_MONOMODE;
EricLew	5:f6afbd3fc47a	625	// HAL_SAI_Init(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	626	//
EricLew	5:f6afbd3fc47a	627	// /* Enable SAI peripheral to generate MCLK */
EricLew	5:f6afbd3fc47a	628	// __HAL_SAI_ENABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	629	// }
EricLew	5:f6afbd3fc47a	630	//}
EricLew	5:f6afbd3fc47a	631
EricLew	5:f6afbd3fc47a	632	/**
EricLew	5:f6afbd3fc47a	633	* @brief register user callback functions
EricLew	5:f6afbd3fc47a	634	* @param ErrorCallback: pointer to the error callback function
EricLew	5:f6afbd3fc47a	635	* @param HalfTransferCallback: pointer to the half transfer callback function
EricLew	5:f6afbd3fc47a	636	* @param TransferCompleteCallback: pointer to the transfer complete callback function
EricLew	5:f6afbd3fc47a	637	* @retval None
EricLew	5:f6afbd3fc47a	638	*/
EricLew	5:f6afbd3fc47a	639	//void BSP_AUDIO_OUT_RegisterCallbacks(Audio_CallbackTypeDef ErrorCallback,
EricLew	5:f6afbd3fc47a	640	// Audio_CallbackTypeDef HalfTransferCallback,
EricLew	5:f6afbd3fc47a	641	// Audio_CallbackTypeDef TransferCompleteCallback)
EricLew	5:f6afbd3fc47a	642	//{
EricLew	5:f6afbd3fc47a	643	// hAudioOut.CbError = ErrorCallback;
EricLew	5:f6afbd3fc47a	644	// hAudioOut.CbHalfTransfer = HalfTransferCallback;
EricLew	5:f6afbd3fc47a	645	// hAudioOut.CbTransferComplete = TransferCompleteCallback;
EricLew	5:f6afbd3fc47a	646	//}
EricLew	5:f6afbd3fc47a	647
EricLew	5:f6afbd3fc47a	648	/**
EricLew	5:f6afbd3fc47a	649	* @brief Tx Transfer completed callbacks.
EricLew	5:f6afbd3fc47a	650	* @param hsai: SAI handle
EricLew	5:f6afbd3fc47a	651	* @retval None
EricLew	5:f6afbd3fc47a	652	*/
EricLew	5:f6afbd3fc47a	653	//void HAL_SAI_TxCpltCallback(SAI_HandleTypeDef *hsai)
EricLew	5:f6afbd3fc47a	654	//{
EricLew	5:f6afbd3fc47a	655	// /* Invoke the registered 'TransferComplete' function (if any) */
EricLew	5:f6afbd3fc47a	656	// if (hAudioOut.CbTransferComplete != (Audio_CallbackTypeDef)NULL)
EricLew	5:f6afbd3fc47a	657	// {
EricLew	5:f6afbd3fc47a	658	// hAudioOut.CbTransferComplete();
EricLew	5:f6afbd3fc47a	659	// }
EricLew	5:f6afbd3fc47a	660	//}
EricLew	5:f6afbd3fc47a	661
EricLew	5:f6afbd3fc47a	662	/**
EricLew	5:f6afbd3fc47a	663	* @brief Tx Half Transfer completed callbacks.
EricLew	5:f6afbd3fc47a	664	* @param hsai: SAI handle
EricLew	5:f6afbd3fc47a	665	* @retval None
EricLew	5:f6afbd3fc47a	666	*/
EricLew	5:f6afbd3fc47a	667	//void HAL_SAI_TxHalfCpltCallback(SAI_HandleTypeDef *hsai)
EricLew	5:f6afbd3fc47a	668	//{
EricLew	5:f6afbd3fc47a	669	// /* Invoke the registered 'HalfTransfer' callback function (if any) */
EricLew	5:f6afbd3fc47a	670	// if (hAudioOut.CbHalfTransfer != (Audio_CallbackTypeDef)NULL)
EricLew	5:f6afbd3fc47a	671	// {
EricLew	5:f6afbd3fc47a	672	// hAudioOut.CbHalfTransfer();
EricLew	5:f6afbd3fc47a	673	// }
EricLew	5:f6afbd3fc47a	674	//}
EricLew	5:f6afbd3fc47a	675
EricLew	5:f6afbd3fc47a	676	/**
EricLew	5:f6afbd3fc47a	677	* @brief SAI error callbacks.
EricLew	5:f6afbd3fc47a	678	* @param hsai: SAI handle
EricLew	5:f6afbd3fc47a	679	* @retval None
EricLew	5:f6afbd3fc47a	680	*/
EricLew	5:f6afbd3fc47a	681	//void HAL_SAI_ErrorCallback(SAI_HandleTypeDef *hsai)
EricLew	5:f6afbd3fc47a	682	//{
EricLew	5:f6afbd3fc47a	683	// /* Invoke the registered 'ErrorCallback' callback function (if any) */
EricLew	5:f6afbd3fc47a	684	// if (hAudioOut.CbError != (Audio_CallbackTypeDef)NULL)
EricLew	5:f6afbd3fc47a	685	// {
EricLew	5:f6afbd3fc47a	686	// hAudioOut.CbError();
EricLew	5:f6afbd3fc47a	687	// }
EricLew	5:f6afbd3fc47a	688	//}
EricLew	5:f6afbd3fc47a	689
EricLew	5:f6afbd3fc47a	690	/**
EricLew	5:f6afbd3fc47a	691	* @}
EricLew	5:f6afbd3fc47a	692	*/
EricLew	5:f6afbd3fc47a	693
EricLew	5:f6afbd3fc47a	694	/** @addtogroup STM32L476G_EVAL_AUDIO_Exported_Functions
EricLew	5:f6afbd3fc47a	695	* @{
EricLew	5:f6afbd3fc47a	696	*/
EricLew	5:f6afbd3fc47a	697
EricLew	5:f6afbd3fc47a	698	/**
EricLew	5:f6afbd3fc47a	699	* @brief Initializes micropone related peripherals.
EricLew	5:f6afbd3fc47a	700	* @note This function assumes that the SAI input clock (through PLL_M)
EricLew	5:f6afbd3fc47a	701	* is already configured and ready to be used.
EricLew	5:f6afbd3fc47a	702	* @param AudioFreq: Audio frequency to be configured for the SAI peripheral.
EricLew	5:f6afbd3fc47a	703	* @param BitRes: Audio frequency to be configured for the SAI peripheral.
EricLew	5:f6afbd3fc47a	704	* @param ChnlNbr: Audio frequency to be configured for the SAI peripheral.
EricLew	5:f6afbd3fc47a	705	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	706	*/
EricLew	5:f6afbd3fc47a	707	uint8_t BSP_AUDIO_IN_Init(uint32_t AudioFreq, uint32_t BitRes, uint32_t ChnlNbr)
EricLew	5:f6afbd3fc47a	708	{
EricLew	5:f6afbd3fc47a	709	/* Update the audio input context */
EricLew	5:f6afbd3fc47a	710	hAudioIn.Frequency = AudioFreq;
EricLew	5:f6afbd3fc47a	711	hAudioIn.BitResolution = BitRes;
EricLew	5:f6afbd3fc47a	712	hAudioIn.ChannelNbr = ChnlNbr;
EricLew	5:f6afbd3fc47a	713	hAudioIn.CbError = (Audio_CallbackTypeDef)NULL;
EricLew	5:f6afbd3fc47a	714	hAudioIn.CbHalfTransfer = (Audio_CallbackTypeDef)NULL;
EricLew	5:f6afbd3fc47a	715	hAudioIn.CbTransferComplete = (Audio_CallbackTypeDef)NULL;
EricLew	5:f6afbd3fc47a	716
EricLew	5:f6afbd3fc47a	717	/* Configure the SAI PLL according to the requested audio frequency */
EricLew	5:f6afbd3fc47a	718	if (AUDIO_SAIPLLConfig(AudioFreq) != AUDIO_OK)
EricLew	5:f6afbd3fc47a	719	{
EricLew	5:f6afbd3fc47a	720	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	721	}
EricLew	5:f6afbd3fc47a	722
EricLew	5:f6afbd3fc47a	723	/* Initializes the Digital Filter for Sigma-Delta Modulators interface */
EricLew	5:f6afbd3fc47a	724	if(AUDIO_DFSDMx_Init(AudioFreq) != AUDIO_OK)
EricLew	5:f6afbd3fc47a	725	{
EricLew	5:f6afbd3fc47a	726	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	727	}
EricLew	5:f6afbd3fc47a	728
EricLew	5:f6afbd3fc47a	729	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	730	}
EricLew	5:f6afbd3fc47a	731
EricLew	5:f6afbd3fc47a	732	/**
EricLew	5:f6afbd3fc47a	733	* @brief De-Initializes microphone related peripherals.
EricLew	5:f6afbd3fc47a	734	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	735
EricLew	5:f6afbd3fc47a	736	*/
EricLew	5:f6afbd3fc47a	737	uint8_t BSP_AUDIO_IN_DeInit(void)
EricLew	5:f6afbd3fc47a	738	{
EricLew	5:f6afbd3fc47a	739	/* De-initializes the Digital Filter for Sigma-Delta Modulators interface */
EricLew	5:f6afbd3fc47a	740	if (AUDIO_DFSDMx_DeInit() != AUDIO_OK)
EricLew	5:f6afbd3fc47a	741	{
EricLew	5:f6afbd3fc47a	742	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	743	}
EricLew	5:f6afbd3fc47a	744
EricLew	5:f6afbd3fc47a	745	/* Reset the audio input context */
EricLew	5:f6afbd3fc47a	746	memset(&hAudioIn, 0, sizeof(hAudioIn));
EricLew	5:f6afbd3fc47a	747
EricLew	5:f6afbd3fc47a	748	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	749	}
EricLew	5:f6afbd3fc47a	750
EricLew	5:f6afbd3fc47a	751	/**
EricLew	5:f6afbd3fc47a	752	* @brief Starts audio recording.
EricLew	5:f6afbd3fc47a	753	* @param pbuf: Main buffer pointer for the recorded data storing
EricLew	5:f6afbd3fc47a	754	* @param size: Current size of the recorded buffer
EricLew	5:f6afbd3fc47a	755	* @note The Right channel is start at first with synchro on start of Left channel
EricLew	5:f6afbd3fc47a	756	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	757	*/
EricLew	5:f6afbd3fc47a	758	uint8_t BSP_AUDIO_IN_Record(uint16_t* pbuf, uint32_t size)
EricLew	5:f6afbd3fc47a	759	{
EricLew	5:f6afbd3fc47a	760	hAudioIn.pRecBuf = pbuf;
EricLew	5:f6afbd3fc47a	761	hAudioIn.RecSize = size;
EricLew	5:f6afbd3fc47a	762
EricLew	5:f6afbd3fc47a	763	/* Allocate hAudioIn.LeftRecBuff buffer */
EricLew	5:f6afbd3fc47a	764	#if defined(BSP_AUDIO_USE_RTOS)
EricLew	5:f6afbd3fc47a	765	hAudioIn.LeftRecBuff = (int32_t )k_malloc(size sizeof(int32_t));
EricLew	5:f6afbd3fc47a	766	#else
EricLew	5:f6afbd3fc47a	767	hAudioIn.LeftRecBuff = (int32_t )malloc(size sizeof(int32_t));
EricLew	5:f6afbd3fc47a	768	#endif
EricLew	5:f6afbd3fc47a	769	if(hAudioIn.LeftRecBuff == NULL)
EricLew	5:f6afbd3fc47a	770	{
EricLew	5:f6afbd3fc47a	771	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	772	}
EricLew	5:f6afbd3fc47a	773
EricLew	5:f6afbd3fc47a	774	/* Call the Media layer start function for left channel */
EricLew	5:f6afbd3fc47a	775	if(HAL_DFSDM_FilterRegularStart_DMA(&BSP_AUDIO_hDfsdmLeftFilter,
EricLew	5:f6afbd3fc47a	776	(int32_t*)hAudioIn.LeftRecBuff,
EricLew	5:f6afbd3fc47a	777	(hAudioIn.RecSize/DEFAULT_AUDIO_IN_CHANNEL_NBR)) != HAL_OK)
EricLew	5:f6afbd3fc47a	778	{
EricLew	5:f6afbd3fc47a	779	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	780	}
EricLew	5:f6afbd3fc47a	781
EricLew	5:f6afbd3fc47a	782	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	783	}
EricLew	5:f6afbd3fc47a	784
EricLew	5:f6afbd3fc47a	785	/**
EricLew	5:f6afbd3fc47a	786	* @brief Updates the audio frequency.
EricLew	5:f6afbd3fc47a	787	* @param AudioFreq: Audio frequency used to record the audio stream.
EricLew	5:f6afbd3fc47a	788	* @note This API should be called after the BSP_AUDIO_IN_Init() to adjust the
EricLew	5:f6afbd3fc47a	789	* audio frequency.
EricLew	5:f6afbd3fc47a	790	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	791	*/
EricLew	5:f6afbd3fc47a	792	uint8_t BSP_AUDIO_IN_SetFrequency(uint32_t AudioFreq)
EricLew	5:f6afbd3fc47a	793	{
EricLew	5:f6afbd3fc47a	794	/* Configure the SAI PLL according to the requested audio frequency */
EricLew	5:f6afbd3fc47a	795	if (AUDIO_SAIPLLConfig(AudioFreq) != AUDIO_OK)
EricLew	5:f6afbd3fc47a	796	{
EricLew	5:f6afbd3fc47a	797	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	798	}
EricLew	5:f6afbd3fc47a	799
EricLew	5:f6afbd3fc47a	800	/* De-initializes the Digital Filter for Sigma-Delta Modulators interface */
EricLew	5:f6afbd3fc47a	801	if(AUDIO_DFSDMx_DeInit() != AUDIO_OK)
EricLew	5:f6afbd3fc47a	802	{
EricLew	5:f6afbd3fc47a	803	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	804	}
EricLew	5:f6afbd3fc47a	805
EricLew	5:f6afbd3fc47a	806	/* Initializes the Digital Filter for Sigma-Delta Modulators interface */
EricLew	5:f6afbd3fc47a	807	if(AUDIO_DFSDMx_Init(AudioFreq) != AUDIO_OK)
EricLew	5:f6afbd3fc47a	808	{
EricLew	5:f6afbd3fc47a	809	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	810	}
EricLew	5:f6afbd3fc47a	811
EricLew	5:f6afbd3fc47a	812	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	813	}
EricLew	5:f6afbd3fc47a	814
EricLew	5:f6afbd3fc47a	815	/**
EricLew	5:f6afbd3fc47a	816	* @brief Regular conversion complete callback.
EricLew	5:f6afbd3fc47a	817	* @note In interrupt mode, user has to read conversion value in this function
EricLew	5:f6afbd3fc47a	818	using HAL_DFSDM_FilterGetRegularValue.
EricLew	5:f6afbd3fc47a	819	* @param hdfsdm_filter : DFSDM filter handle.
EricLew	5:f6afbd3fc47a	820	* @retval None
EricLew	5:f6afbd3fc47a	821	*/
EricLew	5:f6afbd3fc47a	822	void HAL_DFSDM_FilterRegConvCpltCallback(DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
EricLew	5:f6afbd3fc47a	823	{
EricLew	5:f6afbd3fc47a	824	uint32_t index;
EricLew	5:f6afbd3fc47a	825	uint32_t recbufsize = (hAudioIn.RecSize/DEFAULT_AUDIO_IN_CHANNEL_NBR);
EricLew	5:f6afbd3fc47a	826
EricLew	5:f6afbd3fc47a	827	for(index = (recbufsize/2); index < recbufsize; index++)
EricLew	5:f6afbd3fc47a	828	{
EricLew	5:f6afbd3fc47a	829	hAudioIn.pRecBuf[index] = (uint16_t)(SaturaLH((hAudioIn.LeftRecBuff[index] >> 8), -32760, 32760));
EricLew	5:f6afbd3fc47a	830	}
EricLew	5:f6afbd3fc47a	831
EricLew	5:f6afbd3fc47a	832	/* Invoke the registered 'TransferComplete' function (if any) */
EricLew	5:f6afbd3fc47a	833	if (hAudioIn.CbTransferComplete != (Audio_CallbackTypeDef)NULL)
EricLew	5:f6afbd3fc47a	834	{
EricLew	5:f6afbd3fc47a	835	hAudioIn.CbTransferComplete();
EricLew	5:f6afbd3fc47a	836	}
EricLew	5:f6afbd3fc47a	837	}
EricLew	5:f6afbd3fc47a	838
EricLew	5:f6afbd3fc47a	839	/**
EricLew	5:f6afbd3fc47a	840	* @brief Half regular conversion complete callback.
EricLew	5:f6afbd3fc47a	841	* @param hdfsdm_filter : DFSDM filter handle.
EricLew	5:f6afbd3fc47a	842	* @retval None
EricLew	5:f6afbd3fc47a	843	*/
EricLew	5:f6afbd3fc47a	844	void HAL_DFSDM_FilterRegConvHalfCpltCallback(DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
EricLew	5:f6afbd3fc47a	845	{
EricLew	5:f6afbd3fc47a	846	uint32_t index;
EricLew	5:f6afbd3fc47a	847	uint32_t recbufsize = (hAudioIn.RecSize/DEFAULT_AUDIO_IN_CHANNEL_NBR);
EricLew	5:f6afbd3fc47a	848
EricLew	5:f6afbd3fc47a	849
EricLew	5:f6afbd3fc47a	850	for(index = 0; index < (recbufsize/2); index++)
EricLew	5:f6afbd3fc47a	851	{
EricLew	5:f6afbd3fc47a	852	hAudioIn.pRecBuf[index] = (uint16_t)(SaturaLH((hAudioIn.LeftRecBuff[index] >> 8), -32760, 32760));
EricLew	5:f6afbd3fc47a	853	}
EricLew	5:f6afbd3fc47a	854
EricLew	5:f6afbd3fc47a	855	/* Invoke the registered 'HalfTransfer' callback function (if any) */
EricLew	5:f6afbd3fc47a	856	if (hAudioIn.CbHalfTransfer != (Audio_CallbackTypeDef)NULL)
EricLew	5:f6afbd3fc47a	857	{
EricLew	5:f6afbd3fc47a	858	hAudioIn.CbHalfTransfer();
EricLew	5:f6afbd3fc47a	859	}
EricLew	5:f6afbd3fc47a	860	}
EricLew	5:f6afbd3fc47a	861
EricLew	5:f6afbd3fc47a	862	/**
EricLew	5:f6afbd3fc47a	863	* @brief Error callback.
EricLew	5:f6afbd3fc47a	864	* @param hdfsdm_filter : DFSDM filter handle.
EricLew	5:f6afbd3fc47a	865	* @retval None
EricLew	5:f6afbd3fc47a	866	*/
EricLew	5:f6afbd3fc47a	867	void HAL_DFSDM_FilterErrorCallback(DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
EricLew	5:f6afbd3fc47a	868	{
EricLew	5:f6afbd3fc47a	869	/* Invoke the registered 'ErrorCallback' callback function (if any) */
EricLew	5:f6afbd3fc47a	870	if (hAudioIn.CbError != (Audio_CallbackTypeDef)NULL)
EricLew	5:f6afbd3fc47a	871	{
EricLew	5:f6afbd3fc47a	872	hAudioIn.CbError();
EricLew	5:f6afbd3fc47a	873	}
EricLew	5:f6afbd3fc47a	874	}
EricLew	5:f6afbd3fc47a	875
EricLew	5:f6afbd3fc47a	876	/**
EricLew	5:f6afbd3fc47a	877	* @brief Stops audio recording.
EricLew	5:f6afbd3fc47a	878	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	879	*/
EricLew	5:f6afbd3fc47a	880	uint8_t BSP_AUDIO_IN_Stop(void)
EricLew	5:f6afbd3fc47a	881	{
EricLew	5:f6afbd3fc47a	882	/* Call the Media layer stop function for left channel */
EricLew	5:f6afbd3fc47a	883	if(HAL_DFSDM_FilterRegularStop_DMA(&BSP_AUDIO_hDfsdmLeftFilter) != HAL_OK )
EricLew	5:f6afbd3fc47a	884	{
EricLew	5:f6afbd3fc47a	885	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	886	}
EricLew	5:f6afbd3fc47a	887
EricLew	5:f6afbd3fc47a	888	/* Free hAudioIn.LeftRecBuff buffer */
EricLew	5:f6afbd3fc47a	889	#if defined(BSP_AUDIO_USE_RTOS)
EricLew	5:f6afbd3fc47a	890	k_free((void *)hAudioIn.LeftRecBuff);
EricLew	5:f6afbd3fc47a	891	#else
EricLew	5:f6afbd3fc47a	892	free((void *)hAudioIn.LeftRecBuff);
EricLew	5:f6afbd3fc47a	893	#endif
EricLew	5:f6afbd3fc47a	894
EricLew	5:f6afbd3fc47a	895	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	896	}
EricLew	5:f6afbd3fc47a	897
EricLew	5:f6afbd3fc47a	898	/**
EricLew	5:f6afbd3fc47a	899	* @brief Pauses the audio file stream.
EricLew	5:f6afbd3fc47a	900	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	901	*/
EricLew	5:f6afbd3fc47a	902	uint8_t BSP_AUDIO_IN_Pause(void)
EricLew	5:f6afbd3fc47a	903	{
EricLew	5:f6afbd3fc47a	904	/* Call the Media layer stop function */
EricLew	5:f6afbd3fc47a	905	if(HAL_DFSDM_FilterRegularStop_DMA(&BSP_AUDIO_hDfsdmLeftFilter) != HAL_OK)
EricLew	5:f6afbd3fc47a	906	{
EricLew	5:f6afbd3fc47a	907	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	908	}
EricLew	5:f6afbd3fc47a	909
EricLew	5:f6afbd3fc47a	910	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	911	}
EricLew	5:f6afbd3fc47a	912
EricLew	5:f6afbd3fc47a	913	/**
EricLew	5:f6afbd3fc47a	914	* @brief Resumes the audio file stream.
EricLew	5:f6afbd3fc47a	915	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	916	*/
EricLew	5:f6afbd3fc47a	917	uint8_t BSP_AUDIO_IN_Resume(void)
EricLew	5:f6afbd3fc47a	918	{
EricLew	5:f6afbd3fc47a	919	/* Call the Media layer start function for left channel */
EricLew	5:f6afbd3fc47a	920	if(HAL_DFSDM_FilterRegularStart_DMA(&BSP_AUDIO_hDfsdmLeftFilter,
EricLew	5:f6afbd3fc47a	921	(int32_t*)hAudioIn.LeftRecBuff,
EricLew	5:f6afbd3fc47a	922	(hAudioIn.RecSize/DEFAULT_AUDIO_IN_CHANNEL_NBR)) != HAL_OK)
EricLew	5:f6afbd3fc47a	923	{
EricLew	5:f6afbd3fc47a	924	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	925	}
EricLew	5:f6afbd3fc47a	926
EricLew	5:f6afbd3fc47a	927	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	928	}
EricLew	5:f6afbd3fc47a	929
EricLew	5:f6afbd3fc47a	930	/**
EricLew	5:f6afbd3fc47a	931	* @brief register user callback functions
EricLew	5:f6afbd3fc47a	932	* @param ErrorCallback: pointer to the error callback function
EricLew	5:f6afbd3fc47a	933	* @param HalfTransferCallback: pointer to the half transfer callback function
EricLew	5:f6afbd3fc47a	934	* @param TransferCompleteCallback: pointer to the transfer complete callback function
EricLew	5:f6afbd3fc47a	935	* @retval None
EricLew	5:f6afbd3fc47a	936	*/
EricLew	5:f6afbd3fc47a	937	void BSP_AUDIO_IN_RegisterCallbacks(Audio_CallbackTypeDef ErrorCallback,
EricLew	5:f6afbd3fc47a	938	Audio_CallbackTypeDef HalfTransferCallback,
EricLew	5:f6afbd3fc47a	939	Audio_CallbackTypeDef TransferCompleteCallback)
EricLew	5:f6afbd3fc47a	940	{
EricLew	5:f6afbd3fc47a	941	hAudioIn.CbError = ErrorCallback;
EricLew	5:f6afbd3fc47a	942	hAudioIn.CbHalfTransfer = HalfTransferCallback;
EricLew	5:f6afbd3fc47a	943	hAudioIn.CbTransferComplete = TransferCompleteCallback;
EricLew	5:f6afbd3fc47a	944	}
EricLew	5:f6afbd3fc47a	945	/**
EricLew	5:f6afbd3fc47a	946	* @}
EricLew	5:f6afbd3fc47a	947	*/
EricLew	5:f6afbd3fc47a	948
EricLew	5:f6afbd3fc47a	949	/* private functions --------------------------------------------------------*/
EricLew	5:f6afbd3fc47a	950	/** @addtogroup STM32L476G_NUCLEO_AUDIO_Private_Functions
EricLew	5:f6afbd3fc47a	951	* @{
EricLew	5:f6afbd3fc47a	952	*/
EricLew	5:f6afbd3fc47a	953	/**
EricLew	5:f6afbd3fc47a	954	* @brief Initializes the Audio Codec audio interface (SAI).
EricLew	5:f6afbd3fc47a	955	* @param AudioFreq: Audio frequency to be configured for the SAI peripheral.
EricLew	5:f6afbd3fc47a	956	* @note The default SlotActive configuration is set to CODEC_AUDIOFRAME_SLOT_0123
EricLew	5:f6afbd3fc47a	957	* and user can update this configuration using
EricLew	5:f6afbd3fc47a	958	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	959	*/
EricLew	5:f6afbd3fc47a	960	//static uint8_t AUDIO_SAIx_Init(uint32_t AudioFreq)
EricLew	5:f6afbd3fc47a	961	//{
EricLew	5:f6afbd3fc47a	962	// /* Disable SAI peripheral to allow access to SAI internal registers */
EricLew	5:f6afbd3fc47a	963	// __HAL_SAI_DISABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	964	//
EricLew	5:f6afbd3fc47a	965	// /* Initialize the BSP_AUDIO_hSai Instance parameter */
EricLew	5:f6afbd3fc47a	966	// BSP_AUDIO_hSai.Instance = AUDIO_SAIx;
EricLew	5:f6afbd3fc47a	967	//
EricLew	5:f6afbd3fc47a	968	// /* Configure SAI_Block_x
EricLew	5:f6afbd3fc47a	969	// LSBFirst: Disabled
EricLew	5:f6afbd3fc47a	970	// DataSize: 16 */
EricLew	5:f6afbd3fc47a	971	// BSP_AUDIO_hSai.Init.AudioMode = SAI_MODEMASTER_TX;
EricLew	5:f6afbd3fc47a	972	// BSP_AUDIO_hSai.Init.Synchro = SAI_ASYNCHRONOUS;
EricLew	5:f6afbd3fc47a	973	// BSP_AUDIO_hSai.Init.SynchroExt = SAI_SYNCEXT_DISABLE;
EricLew	5:f6afbd3fc47a	974	// BSP_AUDIO_hSai.Init.OutputDrive = SAI_OUTPUTDRIVE_ENABLE;
EricLew	5:f6afbd3fc47a	975	// BSP_AUDIO_hSai.Init.NoDivider = SAI_MASTERDIVIDER_ENABLE;
EricLew	5:f6afbd3fc47a	976	// BSP_AUDIO_hSai.Init.FIFOThreshold = SAI_FIFOTHRESHOLD_1QF;
EricLew	5:f6afbd3fc47a	977	// BSP_AUDIO_hSai.Init.AudioFrequency = SAI_AUDIO_FREQUENCY_MCKDIV;
EricLew	5:f6afbd3fc47a	978	// BSP_AUDIO_hSai.Init.Mckdiv = SAIClockDivider(AudioFreq);
EricLew	5:f6afbd3fc47a	979	// BSP_AUDIO_hSai.Init.MonoStereoMode = SAI_STEREOMODE;
EricLew	5:f6afbd3fc47a	980	// BSP_AUDIO_hSai.Init.CompandingMode = SAI_NOCOMPANDING;
EricLew	5:f6afbd3fc47a	981	// BSP_AUDIO_hSai.Init.TriState = SAI_OUTPUT_NOTRELEASED;
EricLew	5:f6afbd3fc47a	982	// BSP_AUDIO_hSai.Init.Protocol = SAI_FREE_PROTOCOL;
EricLew	5:f6afbd3fc47a	983	// BSP_AUDIO_hSai.Init.DataSize = SAI_DATASIZE_16;
EricLew	5:f6afbd3fc47a	984	// BSP_AUDIO_hSai.Init.FirstBit = SAI_FIRSTBIT_MSB;
EricLew	5:f6afbd3fc47a	985	// BSP_AUDIO_hSai.Init.ClockStrobing = SAI_CLOCKSTROBING_RISINGEDGE;
EricLew	5:f6afbd3fc47a	986	//
EricLew	5:f6afbd3fc47a	987	// /* Configure SAI_Block_x Frame
EricLew	5:f6afbd3fc47a	988	// Frame Length: 32
EricLew	5:f6afbd3fc47a	989	// Frame active Length: 16
EricLew	5:f6afbd3fc47a	990	// FS Definition: Start frame + Channel Side identification
EricLew	5:f6afbd3fc47a	991	// FS Polarity: FS active Low
EricLew	5:f6afbd3fc47a	992	// FS Offset: FS asserted one bit before the first bit of slot 0 */
EricLew	5:f6afbd3fc47a	993	// BSP_AUDIO_hSai.FrameInit.FrameLength = 32;
EricLew	5:f6afbd3fc47a	994	// BSP_AUDIO_hSai.FrameInit.ActiveFrameLength = 16;
EricLew	5:f6afbd3fc47a	995	// BSP_AUDIO_hSai.FrameInit.FSDefinition = SAI_FS_CHANNEL_IDENTIFICATION;
EricLew	5:f6afbd3fc47a	996	// BSP_AUDIO_hSai.FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
EricLew	5:f6afbd3fc47a	997	// BSP_AUDIO_hSai.FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT;
EricLew	5:f6afbd3fc47a	998	//
EricLew	5:f6afbd3fc47a	999	// /* Configure SAI Block_x Slot
EricLew	5:f6afbd3fc47a	1000	// Slot First Bit Offset: 0
EricLew	5:f6afbd3fc47a	1001	// Slot Size : 16
EricLew	5:f6afbd3fc47a	1002	// Slot Number: 2
EricLew	5:f6afbd3fc47a	1003	// Slot Active: Slots 0 and 1 actives */
EricLew	5:f6afbd3fc47a	1004	// BSP_AUDIO_hSai.SlotInit.FirstBitOffset = 0;
EricLew	5:f6afbd3fc47a	1005	// BSP_AUDIO_hSai.SlotInit.SlotSize = SAI_SLOTSIZE_DATASIZE;
EricLew	5:f6afbd3fc47a	1006	// BSP_AUDIO_hSai.SlotInit.SlotNumber = 2;
EricLew	5:f6afbd3fc47a	1007	// BSP_AUDIO_hSai.SlotInit.SlotActive = SAI_SLOTACTIVE_0 \| SAI_SLOTACTIVE_1;
EricLew	5:f6afbd3fc47a	1008	//
EricLew	5:f6afbd3fc47a	1009	// /* Initializes the SAI peripheral*/
EricLew	5:f6afbd3fc47a	1010	// if (HAL_SAI_Init(&BSP_AUDIO_hSai) != HAL_OK)
EricLew	5:f6afbd3fc47a	1011	// {
EricLew	5:f6afbd3fc47a	1012	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1013	// }
EricLew	5:f6afbd3fc47a	1014	//
EricLew	5:f6afbd3fc47a	1015	// /* Enable SAI peripheral to generate MCLK */
EricLew	5:f6afbd3fc47a	1016	// __HAL_SAI_ENABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	1017	//
EricLew	5:f6afbd3fc47a	1018	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	1019	//
EricLew	5:f6afbd3fc47a	1020	//}
EricLew	5:f6afbd3fc47a	1021
EricLew	5:f6afbd3fc47a	1022	/**
EricLew	5:f6afbd3fc47a	1023	* @brief De-initializes the Audio Codec audio interface (SAI).
EricLew	5:f6afbd3fc47a	1024	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	1025	*/
EricLew	5:f6afbd3fc47a	1026	//static uint8_t AUDIO_SAIx_DeInit(void)
EricLew	5:f6afbd3fc47a	1027	//{
EricLew	5:f6afbd3fc47a	1028	// /* Disable the SAI audio block */
EricLew	5:f6afbd3fc47a	1029	// __HAL_SAI_DISABLE(&BSP_AUDIO_hSai);
EricLew	5:f6afbd3fc47a	1030	//
EricLew	5:f6afbd3fc47a	1031	// /* De-initializes the SAI peripheral */
EricLew	5:f6afbd3fc47a	1032	// if (HAL_SAI_DeInit(&BSP_AUDIO_hSai) != HAL_OK)
EricLew	5:f6afbd3fc47a	1033	// {
EricLew	5:f6afbd3fc47a	1034	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1035	// }
EricLew	5:f6afbd3fc47a	1036	//
EricLew	5:f6afbd3fc47a	1037	// /* Disable SAIx PLL */
EricLew	5:f6afbd3fc47a	1038	// if (AUDIO_SAIx_PLL_DISABLE() != AUDIO_OK)
EricLew	5:f6afbd3fc47a	1039	// {
EricLew	5:f6afbd3fc47a	1040	// return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1041	// }
EricLew	5:f6afbd3fc47a	1042	//
EricLew	5:f6afbd3fc47a	1043	// return AUDIO_OK;
EricLew	5:f6afbd3fc47a	1044	//}
EricLew	5:f6afbd3fc47a	1045
EricLew	5:f6afbd3fc47a	1046	/**
EricLew	5:f6afbd3fc47a	1047	* @brief SAI MSP Init
EricLew	5:f6afbd3fc47a	1048	* @param hsai : pointer to a SAI_HandleTypeDef structure
EricLew	5:f6afbd3fc47a	1049	* @retval None
EricLew	5:f6afbd3fc47a	1050	*/
EricLew	5:f6afbd3fc47a	1051	void HAL_SAI_MspInit(SAI_HandleTypeDef *hsai)
EricLew	5:f6afbd3fc47a	1052	{
EricLew	5:f6afbd3fc47a	1053	GPIO_InitTypeDef GPIO_InitStruct;
EricLew	5:f6afbd3fc47a	1054
EricLew	5:f6afbd3fc47a	1055	/* Enable SAI clock */
EricLew	5:f6afbd3fc47a	1056	AUDIO_SAIx_CLK_ENABLE();
EricLew	5:f6afbd3fc47a	1057
EricLew	5:f6afbd3fc47a	1058	/* Enable GPIO clock */
EricLew	5:f6afbd3fc47a	1059	AUDIO_SAIx_MCK_SCK_SD_FS_ENABLE();
EricLew	5:f6afbd3fc47a	1060
EricLew	5:f6afbd3fc47a	1061	/* CODEC_SAI pins configuration: FS, SCK, MCK and SD pins ------------------*/
EricLew	5:f6afbd3fc47a	1062	GPIO_InitStruct.Pin = AUDIO_SAIx_FS_PIN \| AUDIO_SAIx_SCK_PIN \| AUDIO_SAIx_SD_PIN \| AUDIO_SAIx_MCK_PIN;
EricLew	5:f6afbd3fc47a	1063	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
EricLew	5:f6afbd3fc47a	1064	GPIO_InitStruct.Pull = GPIO_NOPULL;
EricLew	5:f6afbd3fc47a	1065	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
EricLew	5:f6afbd3fc47a	1066	GPIO_InitStruct.Alternate = AUDIO_SAIx_MCK_SCK_SD_FS_AF;
EricLew	5:f6afbd3fc47a	1067	HAL_GPIO_Init(AUDIO_SAIx_MCK_SCK_SD_FS_GPIO_PORT, &GPIO_InitStruct);
EricLew	5:f6afbd3fc47a	1068
EricLew	5:f6afbd3fc47a	1069	/* Enable the DMA clock */
EricLew	5:f6afbd3fc47a	1070	AUDIO_SAIx_DMAx_CLK_ENABLE();
EricLew	5:f6afbd3fc47a	1071
EricLew	5:f6afbd3fc47a	1072	if(hsai->Instance == AUDIO_SAIx)
EricLew	5:f6afbd3fc47a	1073	{
EricLew	5:f6afbd3fc47a	1074	/* Configure the hDmaSai handle parameters */
EricLew	5:f6afbd3fc47a	1075	hDmaSai.Init.Request = DMA_REQUEST_1;
EricLew	5:f6afbd3fc47a	1076	hDmaSai.Init.Direction = DMA_MEMORY_TO_PERIPH;
EricLew	5:f6afbd3fc47a	1077	hDmaSai.Init.PeriphInc = DMA_PINC_DISABLE;
EricLew	5:f6afbd3fc47a	1078	hDmaSai.Init.MemInc = DMA_MINC_ENABLE;
EricLew	5:f6afbd3fc47a	1079	hDmaSai.Init.PeriphDataAlignment = AUDIO_SAIx_DMAx_PERIPH_DATA_SIZE;
EricLew	5:f6afbd3fc47a	1080	hDmaSai.Init.MemDataAlignment = AUDIO_SAIx_DMAx_MEM_DATA_SIZE;
EricLew	5:f6afbd3fc47a	1081	hDmaSai.Init.Mode = DMA_NORMAL;
EricLew	5:f6afbd3fc47a	1082	hDmaSai.Init.Priority = DMA_PRIORITY_HIGH;
EricLew	5:f6afbd3fc47a	1083
EricLew	5:f6afbd3fc47a	1084	hDmaSai.Instance = AUDIO_SAIx_DMAx_CHANNEL;
EricLew	5:f6afbd3fc47a	1085
EricLew	5:f6afbd3fc47a	1086	/* Associate the DMA handle */
EricLew	5:f6afbd3fc47a	1087	__HAL_LINKDMA(hsai, hdmatx, hDmaSai);
EricLew	5:f6afbd3fc47a	1088
EricLew	5:f6afbd3fc47a	1089	/* Deinitialize the Stream for new transfer */
EricLew	5:f6afbd3fc47a	1090	HAL_DMA_DeInit(&hDmaSai);
EricLew	5:f6afbd3fc47a	1091
EricLew	5:f6afbd3fc47a	1092	/* Configure the DMA Stream */
EricLew	5:f6afbd3fc47a	1093	HAL_DMA_Init(&hDmaSai);
EricLew	5:f6afbd3fc47a	1094	}
EricLew	5:f6afbd3fc47a	1095
EricLew	5:f6afbd3fc47a	1096	/* SAI DMA IRQ Channel configuration */
EricLew	5:f6afbd3fc47a	1097	HAL_NVIC_SetPriority(AUDIO_SAIx_DMAx_IRQ, AUDIO_OUT_IRQ_PREPRIO, 0);
EricLew	5:f6afbd3fc47a	1098	HAL_NVIC_EnableIRQ(AUDIO_SAIx_DMAx_IRQ);
EricLew	5:f6afbd3fc47a	1099	}
EricLew	5:f6afbd3fc47a	1100
EricLew	5:f6afbd3fc47a	1101	/**
EricLew	5:f6afbd3fc47a	1102	* @brief SAI MSP De-init
EricLew	5:f6afbd3fc47a	1103	* @param hsai : pointer to a SAI_HandleTypeDef structure
EricLew	5:f6afbd3fc47a	1104	* @retval None
EricLew	5:f6afbd3fc47a	1105	*/
EricLew	5:f6afbd3fc47a	1106	void HAL_SAI_MspDeInit(SAI_HandleTypeDef *hsai)
EricLew	5:f6afbd3fc47a	1107	{
EricLew	5:f6afbd3fc47a	1108	/* Disable SAI DMA Channel IRQ */
EricLew	5:f6afbd3fc47a	1109	HAL_NVIC_DisableIRQ(AUDIO_SAIx_DMAx_IRQ);
EricLew	5:f6afbd3fc47a	1110
EricLew	5:f6afbd3fc47a	1111	/* Reset the DMA Stream configuration*/
EricLew	5:f6afbd3fc47a	1112	HAL_DMA_DeInit(&hDmaSai);
EricLew	5:f6afbd3fc47a	1113
EricLew	5:f6afbd3fc47a	1114	/* Disable the DMA clock */
EricLew	5:f6afbd3fc47a	1115	AUDIO_SAIx_DMAx_CLK_DISABLE();
EricLew	5:f6afbd3fc47a	1116
EricLew	5:f6afbd3fc47a	1117	/* De-initialize FS, SCK, MCK and SD pins*/
EricLew	5:f6afbd3fc47a	1118	HAL_GPIO_DeInit(AUDIO_SAIx_MCK_SCK_SD_FS_GPIO_PORT,
EricLew	5:f6afbd3fc47a	1119	AUDIO_SAIx_FS_PIN \| AUDIO_SAIx_SCK_PIN \| AUDIO_SAIx_SD_PIN \| AUDIO_SAIx_MCK_PIN);
EricLew	5:f6afbd3fc47a	1120
EricLew	5:f6afbd3fc47a	1121	/* Disable GPIO clock */
EricLew	5:f6afbd3fc47a	1122	AUDIO_SAIx_MCK_SCK_SD_FS_DISABLE();
EricLew	5:f6afbd3fc47a	1123
EricLew	5:f6afbd3fc47a	1124	/* Disable SAI clock */
EricLew	5:f6afbd3fc47a	1125	AUDIO_SAIx_CLK_DISABLE();
EricLew	5:f6afbd3fc47a	1126	}
EricLew	5:f6afbd3fc47a	1127
EricLew	5:f6afbd3fc47a	1128	/**
EricLew	5:f6afbd3fc47a	1129	* @brief Resets the audio codec. It restores the default configuration of the
EricLew	5:f6afbd3fc47a	1130	* codec (this function shall be called before initializing the codec).
EricLew	5:f6afbd3fc47a	1131	* @retval None
EricLew	5:f6afbd3fc47a	1132	*/
EricLew	5:f6afbd3fc47a	1133	//static void AUDIO_CODEC_Reset(void)
EricLew	5:f6afbd3fc47a	1134	//{
EricLew	5:f6afbd3fc47a	1135	// /* Initialize the audio driver structure */
EricLew	5:f6afbd3fc47a	1136	// hAudioOut.AudioDrv = &cs43l22_drv;
EricLew	5:f6afbd3fc47a	1137	//
EricLew	5:f6afbd3fc47a	1138	// hAudioOut.AudioDrv->Reset(AUDIO_I2C_ADDRESS);
EricLew	5:f6afbd3fc47a	1139	//}
EricLew	5:f6afbd3fc47a	1140
EricLew	5:f6afbd3fc47a	1141	/**
EricLew	5:f6afbd3fc47a	1142	* @}
EricLew	5:f6afbd3fc47a	1143	*/
EricLew	5:f6afbd3fc47a	1144
EricLew	5:f6afbd3fc47a	1145	/** @addtogroup STM32L476G_NUCLEO_AUDIO_Private_Functions
EricLew	5:f6afbd3fc47a	1146	* @{
EricLew	5:f6afbd3fc47a	1147	*/
EricLew	5:f6afbd3fc47a	1148
EricLew	5:f6afbd3fc47a	1149	/**
EricLew	5:f6afbd3fc47a	1150	* @brief Initializes the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
EricLew	5:f6afbd3fc47a	1151	* @param AudioFreq: Audio frequency to be used to set correctly the DFSDM peripheral.
EricLew	5:f6afbd3fc47a	1152	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	1153	*/
EricLew	5:f6afbd3fc47a	1154	static uint8_t AUDIO_DFSDMx_Init(uint32_t AudioFreq)
EricLew	5:f6afbd3fc47a	1155	{
EricLew	5:f6afbd3fc47a	1156	/####CHANNEL 2####/
EricLew	5:f6afbd3fc47a	1157	hAudioIn.hDfsdmLeftChannel.Init.OutputClock.Activation = ENABLE;
EricLew	5:f6afbd3fc47a	1158	hAudioIn.hDfsdmLeftChannel.Init.OutputClock.Selection = DFSDM_CHANNEL_OUTPUT_CLOCK_AUDIO;
EricLew	5:f6afbd3fc47a	1159	/* Set the DFSDM clock OUT audio frequency configuration */
EricLew	5:f6afbd3fc47a	1160	hAudioIn.hDfsdmLeftChannel.Init.OutputClock.Divider = DFSDMClockDivider(AudioFreq);
EricLew	5:f6afbd3fc47a	1161	hAudioIn.hDfsdmLeftChannel.Init.Input.Multiplexer = DFSDM_CHANNEL_EXTERNAL_INPUTS;
EricLew	5:f6afbd3fc47a	1162	hAudioIn.hDfsdmLeftChannel.Init.Input.DataPacking = DFSDM_CHANNEL_STANDARD_MODE;
EricLew	5:f6afbd3fc47a	1163	hAudioIn.hDfsdmLeftChannel.Init.Input.Pins = DFSDM_CHANNEL_SAME_CHANNEL_PINS;
EricLew	5:f6afbd3fc47a	1164	/* Request to sample stable data for LEFT micro on Rising edge */
EricLew	5:f6afbd3fc47a	1165	hAudioIn.hDfsdmLeftChannel.Init.SerialInterface.Type = DFSDM_CHANNEL_SPI_RISING;
EricLew	5:f6afbd3fc47a	1166	hAudioIn.hDfsdmLeftChannel.Init.SerialInterface.SpiClock = DFSDM_CHANNEL_SPI_CLOCK_INTERNAL;
EricLew	5:f6afbd3fc47a	1167	hAudioIn.hDfsdmLeftChannel.Init.Awd.FilterOrder = DFSDM_CHANNEL_SINC1_ORDER;
EricLew	5:f6afbd3fc47a	1168	hAudioIn.hDfsdmLeftChannel.Init.Awd.Oversampling = 10;
EricLew	5:f6afbd3fc47a	1169	hAudioIn.hDfsdmLeftChannel.Init.Offset = 0;
EricLew	5:f6afbd3fc47a	1170	hAudioIn.hDfsdmLeftChannel.Init.RightBitShift = DFSDMRightBitShift(AudioFreq);
EricLew	5:f6afbd3fc47a	1171
EricLew	5:f6afbd3fc47a	1172	hAudioIn.hDfsdmLeftChannel.Instance = DFSDM_Channel2;
EricLew	5:f6afbd3fc47a	1173
EricLew	5:f6afbd3fc47a	1174	/* Init the DFSDM Channel */
EricLew	5:f6afbd3fc47a	1175	if (HAL_DFSDM_ChannelInit(&hAudioIn.hDfsdmLeftChannel) != HAL_OK)
EricLew	5:f6afbd3fc47a	1176	{
EricLew	5:f6afbd3fc47a	1177	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1178	}
EricLew	5:f6afbd3fc47a	1179
EricLew	5:f6afbd3fc47a	1180	/####FILTER 0####/
EricLew	5:f6afbd3fc47a	1181	BSP_AUDIO_hDfsdmLeftFilter.Init.RegularParam.Trigger = DFSDM_FILTER_SW_TRIGGER;
EricLew	5:f6afbd3fc47a	1182	BSP_AUDIO_hDfsdmLeftFilter.Init.RegularParam.FastMode = ENABLE;
EricLew	5:f6afbd3fc47a	1183	BSP_AUDIO_hDfsdmLeftFilter.Init.RegularParam.DmaMode = ENABLE;
EricLew	5:f6afbd3fc47a	1184	BSP_AUDIO_hDfsdmLeftFilter.Init.InjectedParam.Trigger = DFSDM_FILTER_SW_TRIGGER;
EricLew	5:f6afbd3fc47a	1185	BSP_AUDIO_hDfsdmLeftFilter.Init.InjectedParam.ScanMode = DISABLE;
EricLew	5:f6afbd3fc47a	1186	BSP_AUDIO_hDfsdmLeftFilter.Init.InjectedParam.DmaMode = DISABLE;
EricLew	5:f6afbd3fc47a	1187	BSP_AUDIO_hDfsdmLeftFilter.Init.InjectedParam.ExtTrigger = DFSDM_FILTER_EXT_TRIG_TIM8_TRGO;
EricLew	5:f6afbd3fc47a	1188	BSP_AUDIO_hDfsdmLeftFilter.Init.InjectedParam.ExtTriggerEdge = DFSDM_FILTER_EXT_TRIG_BOTH_EDGES;
EricLew	5:f6afbd3fc47a	1189	BSP_AUDIO_hDfsdmLeftFilter.Init.FilterParam.SincOrder = DFSDMFilterOrder(AudioFreq);
EricLew	5:f6afbd3fc47a	1190	/* Set the DFSDM Filters Oversampling to have correct sample rate */
EricLew	5:f6afbd3fc47a	1191	BSP_AUDIO_hDfsdmLeftFilter.Init.FilterParam.Oversampling = DFSDMOverSampling(AudioFreq);
EricLew	5:f6afbd3fc47a	1192	BSP_AUDIO_hDfsdmLeftFilter.Init.FilterParam.IntOversampling = 1;
EricLew	5:f6afbd3fc47a	1193
EricLew	5:f6afbd3fc47a	1194	BSP_AUDIO_hDfsdmLeftFilter.Instance = AUDIO_DFSDMx_LEFT_FILTER;
EricLew	5:f6afbd3fc47a	1195
EricLew	5:f6afbd3fc47a	1196	/* Init the DFSDM Filter */
EricLew	5:f6afbd3fc47a	1197	if (HAL_DFSDM_FilterInit(&BSP_AUDIO_hDfsdmLeftFilter) != HAL_OK)
EricLew	5:f6afbd3fc47a	1198	{
EricLew	5:f6afbd3fc47a	1199	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1200	}
EricLew	5:f6afbd3fc47a	1201
EricLew	5:f6afbd3fc47a	1202	/* Configure regular channel */
EricLew	5:f6afbd3fc47a	1203	if (HAL_DFSDM_FilterConfigRegChannel(&BSP_AUDIO_hDfsdmLeftFilter,
EricLew	5:f6afbd3fc47a	1204	DFSDM_CHANNEL_2,
EricLew	5:f6afbd3fc47a	1205	DFSDM_CONTINUOUS_CONV_ON) != HAL_OK)
EricLew	5:f6afbd3fc47a	1206	{
EricLew	5:f6afbd3fc47a	1207	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1208	}
EricLew	5:f6afbd3fc47a	1209
EricLew	5:f6afbd3fc47a	1210	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	1211	}
EricLew	5:f6afbd3fc47a	1212
EricLew	5:f6afbd3fc47a	1213	/**
EricLew	5:f6afbd3fc47a	1214	* @brief De-initializes the Digital Filter for Sigma-Delta Modulators interface (DFSDM).
EricLew	5:f6afbd3fc47a	1215	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	1216	*/
EricLew	5:f6afbd3fc47a	1217	static uint8_t AUDIO_DFSDMx_DeInit(void)
EricLew	5:f6afbd3fc47a	1218	{
EricLew	5:f6afbd3fc47a	1219	/* De-initializes the DFSDM filters to allow access to DFSDM internal registers */
EricLew	5:f6afbd3fc47a	1220	if (HAL_DFSDM_FilterDeInit(&BSP_AUDIO_hDfsdmLeftFilter) != HAL_OK)
EricLew	5:f6afbd3fc47a	1221	{
EricLew	5:f6afbd3fc47a	1222	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1223	}
EricLew	5:f6afbd3fc47a	1224
EricLew	5:f6afbd3fc47a	1225	/* De-initializes the DFSDM channels to allow access to DFSDM internal registers */
EricLew	5:f6afbd3fc47a	1226	if (HAL_DFSDM_ChannelDeInit(&hAudioIn.hDfsdmLeftChannel) != HAL_OK)
EricLew	5:f6afbd3fc47a	1227	{
EricLew	5:f6afbd3fc47a	1228	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1229	}
EricLew	5:f6afbd3fc47a	1230
EricLew	5:f6afbd3fc47a	1231	/* Disable DFSDM clock */
EricLew	5:f6afbd3fc47a	1232	AUDIO_DFSDMx_CLK_DISABLE();
EricLew	5:f6afbd3fc47a	1233
EricLew	5:f6afbd3fc47a	1234	/* Disable SAIx PLL */
EricLew	5:f6afbd3fc47a	1235	if (AUDIO_SAIx_PLL_DISABLE() != AUDIO_OK)
EricLew	5:f6afbd3fc47a	1236	{
EricLew	5:f6afbd3fc47a	1237	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1238	}
EricLew	5:f6afbd3fc47a	1239
EricLew	5:f6afbd3fc47a	1240	/* DFSDM reset */
EricLew	5:f6afbd3fc47a	1241	__HAL_RCC_DFSDM_FORCE_RESET();
EricLew	5:f6afbd3fc47a	1242	__HAL_RCC_DFSDM_RELEASE_RESET();
EricLew	5:f6afbd3fc47a	1243
EricLew	5:f6afbd3fc47a	1244	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	1245	}
EricLew	5:f6afbd3fc47a	1246
EricLew	5:f6afbd3fc47a	1247	/**
EricLew	5:f6afbd3fc47a	1248	* @brief Initializes the DFSDM channel MSP.
EricLew	5:f6afbd3fc47a	1249	* @param hdfsdm_channel : DFSDM channel handle.
EricLew	5:f6afbd3fc47a	1250	* @retval None
EricLew	5:f6afbd3fc47a	1251	*/
EricLew	5:f6afbd3fc47a	1252	void HAL_DFSDM_ChannelMspInit(DFSDM_Channel_HandleTypeDef *hdfsdm_channel)
EricLew	5:f6afbd3fc47a	1253	{
EricLew	5:f6afbd3fc47a	1254	GPIO_InitTypeDef GPIO_InitStruct;
EricLew	5:f6afbd3fc47a	1255
EricLew	5:f6afbd3fc47a	1256	/* Enable DFSDM clock */
EricLew	5:f6afbd3fc47a	1257	AUDIO_DFSDMx_CLK_ENABLE();
EricLew	5:f6afbd3fc47a	1258
EricLew	5:f6afbd3fc47a	1259	/* Enable GPIO clock */
EricLew	5:f6afbd3fc47a	1260	AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_CLK_ENABLE();
EricLew	5:f6afbd3fc47a	1261
EricLew	5:f6afbd3fc47a	1262	/* DFSDM pins configuration: DFSDM_CKOUT, DMIC_DATIN pins ------------------*/
EricLew	5:f6afbd3fc47a	1263	GPIO_InitStruct.Pin = AUDIO_DFSDMx_CKOUT_PIN \| AUDIO_DFSDMx_DMIC_DATIN_PIN;
EricLew	5:f6afbd3fc47a	1264	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
EricLew	5:f6afbd3fc47a	1265	GPIO_InitStruct.Pull = GPIO_NOPULL;
EricLew	5:f6afbd3fc47a	1266	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
EricLew	5:f6afbd3fc47a	1267	GPIO_InitStruct.Alternate = AUDIO_DFSDMx_CKOUT_DMIC_DATIN_AF;
EricLew	5:f6afbd3fc47a	1268	HAL_GPIO_Init(AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, &GPIO_InitStruct);
EricLew	5:f6afbd3fc47a	1269	}
EricLew	5:f6afbd3fc47a	1270
EricLew	5:f6afbd3fc47a	1271	/**
EricLew	5:f6afbd3fc47a	1272	* @brief De-initializes the DFSDM channel MSP.
EricLew	5:f6afbd3fc47a	1273	* @param hdfsdm_channel : DFSDM channel handle.
EricLew	5:f6afbd3fc47a	1274	* @retval None
EricLew	5:f6afbd3fc47a	1275	*/
EricLew	5:f6afbd3fc47a	1276	void HAL_DFSDM_ChannelMspDeInit(DFSDM_Channel_HandleTypeDef *hdfsdm_channel)
EricLew	5:f6afbd3fc47a	1277	{
EricLew	5:f6afbd3fc47a	1278	GPIO_InitTypeDef GPIO_InitStruct;
EricLew	5:f6afbd3fc47a	1279
EricLew	5:f6afbd3fc47a	1280	/* Enable GPIO clock */
EricLew	5:f6afbd3fc47a	1281	AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_CLK_ENABLE();
EricLew	5:f6afbd3fc47a	1282
EricLew	5:f6afbd3fc47a	1283	/* DFSDM pins configuration: DFSDM_CKOUT */
EricLew	5:f6afbd3fc47a	1284	GPIO_InitStruct.Pin = AUDIO_DFSDMx_CKOUT_PIN;
EricLew	5:f6afbd3fc47a	1285	GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
EricLew	5:f6afbd3fc47a	1286	GPIO_InitStruct.Pull = GPIO_NOPULL;
EricLew	5:f6afbd3fc47a	1287	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
EricLew	5:f6afbd3fc47a	1288	HAL_GPIO_Init(AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, &GPIO_InitStruct);
EricLew	5:f6afbd3fc47a	1289	HAL_GPIO_WritePin(AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, AUDIO_DFSDMx_CKOUT_PIN, GPIO_PIN_RESET);
EricLew	5:f6afbd3fc47a	1290
EricLew	5:f6afbd3fc47a	1291
EricLew	5:f6afbd3fc47a	1292	/* De-initialize DMIC_DATIN pin */
EricLew	5:f6afbd3fc47a	1293	HAL_GPIO_DeInit(AUDIO_DFSDMx_CKOUT_DMIC_DATIN_GPIO_PORT, AUDIO_DFSDMx_DMIC_DATIN_PIN);
EricLew	5:f6afbd3fc47a	1294	}
EricLew	5:f6afbd3fc47a	1295
EricLew	5:f6afbd3fc47a	1296	/**
EricLew	5:f6afbd3fc47a	1297	* @brief Initializes the DFSDM filter MSP.
EricLew	5:f6afbd3fc47a	1298	* @param hdfsdm_filter : DFSDM filter handle.
EricLew	5:f6afbd3fc47a	1299	* @retval None
EricLew	5:f6afbd3fc47a	1300	*/
EricLew	5:f6afbd3fc47a	1301	void HAL_DFSDM_FilterMspInit(DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
EricLew	5:f6afbd3fc47a	1302	{
EricLew	5:f6afbd3fc47a	1303	/* Enable DFSDM clock */
EricLew	5:f6afbd3fc47a	1304	AUDIO_DFSDMx_CLK_ENABLE();
EricLew	5:f6afbd3fc47a	1305
EricLew	5:f6afbd3fc47a	1306	/* Enable the DMA clock */
EricLew	5:f6afbd3fc47a	1307	AUDIO_DFSDMx_DMAx_CLK_ENABLE();
EricLew	5:f6afbd3fc47a	1308
EricLew	5:f6afbd3fc47a	1309	/* Configure the hAudioIn.hDmaDfsdmLeft handle parameters */
EricLew	5:f6afbd3fc47a	1310	hAudioIn.hDmaDfsdmLeft.Init.Request = DMA_REQUEST_0;
EricLew	5:f6afbd3fc47a	1311	hAudioIn.hDmaDfsdmLeft.Init.Direction = DMA_PERIPH_TO_MEMORY;
EricLew	5:f6afbd3fc47a	1312	hAudioIn.hDmaDfsdmLeft.Init.PeriphInc = DMA_PINC_DISABLE;
EricLew	5:f6afbd3fc47a	1313	hAudioIn.hDmaDfsdmLeft.Init.MemInc = DMA_MINC_ENABLE;
EricLew	5:f6afbd3fc47a	1314	hAudioIn.hDmaDfsdmLeft.Init.PeriphDataAlignment = AUDIO_DFSDMx_DMAx_PERIPH_DATA_SIZE;
EricLew	5:f6afbd3fc47a	1315	hAudioIn.hDmaDfsdmLeft.Init.MemDataAlignment = AUDIO_DFSDMx_DMAx_MEM_DATA_SIZE;
EricLew	5:f6afbd3fc47a	1316	hAudioIn.hDmaDfsdmLeft.Init.Mode = DMA_CIRCULAR;
EricLew	5:f6afbd3fc47a	1317	hAudioIn.hDmaDfsdmLeft.Init.Priority = DMA_PRIORITY_HIGH;
EricLew	5:f6afbd3fc47a	1318
EricLew	5:f6afbd3fc47a	1319	hAudioIn.hDmaDfsdmLeft.Instance = AUDIO_DFSDMx_DMAx_LEFT_CHANNEL;
EricLew	5:f6afbd3fc47a	1320
EricLew	5:f6afbd3fc47a	1321	/* Associate the DMA handle */
EricLew	5:f6afbd3fc47a	1322	__HAL_LINKDMA(hdfsdm_filter, hdmaReg, hAudioIn.hDmaDfsdmLeft);
EricLew	5:f6afbd3fc47a	1323
EricLew	5:f6afbd3fc47a	1324	/* Reset DMA handle state */
EricLew	5:f6afbd3fc47a	1325	__HAL_DMA_RESET_HANDLE_STATE(&hAudioIn.hDmaDfsdmLeft);
EricLew	5:f6afbd3fc47a	1326
EricLew	5:f6afbd3fc47a	1327	/* Configure the DMA Channel */
EricLew	5:f6afbd3fc47a	1328	HAL_DMA_Init(&hAudioIn.hDmaDfsdmLeft);
EricLew	5:f6afbd3fc47a	1329
EricLew	5:f6afbd3fc47a	1330	/* DMA IRQ Channel configuration */
EricLew	5:f6afbd3fc47a	1331	HAL_NVIC_SetPriority(AUDIO_DFSDMx_DMAx_LEFT_IRQ, AUDIO_OUT_IRQ_PREPRIO, 0);
EricLew	5:f6afbd3fc47a	1332	HAL_NVIC_EnableIRQ(AUDIO_DFSDMx_DMAx_LEFT_IRQ);
EricLew	5:f6afbd3fc47a	1333	}
EricLew	5:f6afbd3fc47a	1334
EricLew	5:f6afbd3fc47a	1335	/**
EricLew	5:f6afbd3fc47a	1336	* @brief De-initializes the DFSDM filter MSP.
EricLew	5:f6afbd3fc47a	1337	* @param hdfsdm_filter : DFSDM filter handle.
EricLew	5:f6afbd3fc47a	1338	* @retval None
EricLew	5:f6afbd3fc47a	1339	*/
EricLew	5:f6afbd3fc47a	1340	void HAL_DFSDM_FilterMspDeInit(DFSDM_Filter_HandleTypeDef *hdfsdm_filter)
EricLew	5:f6afbd3fc47a	1341	{
EricLew	5:f6afbd3fc47a	1342	/* Disable DMA Channel IRQ */
EricLew	5:f6afbd3fc47a	1343	HAL_NVIC_DisableIRQ(AUDIO_DFSDMx_DMAx_LEFT_IRQ);
EricLew	5:f6afbd3fc47a	1344
EricLew	5:f6afbd3fc47a	1345	/* De-initialize the DMA Channel */
EricLew	5:f6afbd3fc47a	1346	HAL_DMA_DeInit(&hAudioIn.hDmaDfsdmLeft);
EricLew	5:f6afbd3fc47a	1347
EricLew	5:f6afbd3fc47a	1348	/* Disable the DMA clock */
EricLew	5:f6afbd3fc47a	1349	AUDIO_DFSDMx_DMAx_CLK_DISABLE();
EricLew	5:f6afbd3fc47a	1350	}
EricLew	5:f6afbd3fc47a	1351
EricLew	5:f6afbd3fc47a	1352	/**
EricLew	5:f6afbd3fc47a	1353	* @brief Configures the SAI PLL clock according to the required audio frequency.
EricLew	5:f6afbd3fc47a	1354	* @param Frequency: Audio frequency.
EricLew	5:f6afbd3fc47a	1355	* @retval BSP AUDIO status
EricLew	5:f6afbd3fc47a	1356	* @note The SAI PLL input clock must be configured in the user application.
EricLew	5:f6afbd3fc47a	1357	* The SAI PLL configuration done within this function assumes that
EricLew	5:f6afbd3fc47a	1358	* the SAI PLL input clock runs at 8 MHz.
EricLew	5:f6afbd3fc47a	1359	*/
EricLew	5:f6afbd3fc47a	1360	static uint8_t AUDIO_SAIPLLConfig(uint32_t Frequency)
EricLew	5:f6afbd3fc47a	1361	{
EricLew	5:f6afbd3fc47a	1362	RCC_PeriphCLKInitTypeDef RCC_ExCLKInitStruct;
EricLew	5:f6afbd3fc47a	1363
EricLew	5:f6afbd3fc47a	1364	/* Retreive actual RCC configuration */
EricLew	5:f6afbd3fc47a	1365	HAL_RCCEx_GetPeriphCLKConfig(&RCC_ExCLKInitStruct);
EricLew	5:f6afbd3fc47a	1366
EricLew	5:f6afbd3fc47a	1367	if ( (Frequency == AUDIO_FREQUENCY_11K)
EricLew	5:f6afbd3fc47a	1368	\|\| (Frequency == AUDIO_FREQUENCY_22K)
EricLew	5:f6afbd3fc47a	1369	\|\| (Frequency == AUDIO_FREQUENCY_44K) )
EricLew	5:f6afbd3fc47a	1370	{
EricLew	5:f6afbd3fc47a	1371	/* Configure PLLSAI prescalers */
EricLew	5:f6afbd3fc47a	1372	/* SAI clock config
EricLew	5:f6afbd3fc47a	1373	PLLSAI1_VCO= 8 Mhz * PLLSAI1N = 8 * 24 = VCO_192M
EricLew	5:f6afbd3fc47a	1374	SAI_CK_x = PLLSAI1_VCO/PLLSAI1P = 192/17 = 11.294 Mhz */
EricLew	5:f6afbd3fc47a	1375	RCC_ExCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SAI1;
EricLew	5:f6afbd3fc47a	1376	RCC_ExCLKInitStruct.PLLSAI1.PLLSAI1N = 24;
EricLew	5:f6afbd3fc47a	1377	RCC_ExCLKInitStruct.PLLSAI1.PLLSAI1P = 17;
EricLew	5:f6afbd3fc47a	1378	RCC_ExCLKInitStruct.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_SAI1CLK;
EricLew	5:f6afbd3fc47a	1379	RCC_ExCLKInitStruct.Sai1ClockSelection = RCC_SAI1CLKSOURCE_PLLSAI1;
EricLew	5:f6afbd3fc47a	1380	}
EricLew	5:f6afbd3fc47a	1381	else /* AUDIO_FREQUENCY_8K, AUDIO_FREQUENCY_16K, AUDIO_FREQUENCY_48K, AUDIO_FREQUENCY_96K */
EricLew	5:f6afbd3fc47a	1382	{
EricLew	5:f6afbd3fc47a	1383	/* SAI clock config
EricLew	5:f6afbd3fc47a	1384	PLLSAI1_VCO= 8 Mhz * PLLSAI1N = 8 * 43 = VCO_344M
EricLew	5:f6afbd3fc47a	1385	SAI_CK_x = PLLSAI1_VCO/PLLSAI1P = 344/7 = 49.142 Mhz */
EricLew	5:f6afbd3fc47a	1386	RCC_ExCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_SAI1;
EricLew	5:f6afbd3fc47a	1387	RCC_ExCLKInitStruct.PLLSAI1.PLLSAI1N = 43;
EricLew	5:f6afbd3fc47a	1388	RCC_ExCLKInitStruct.PLLSAI1.PLLSAI1P = 7;
EricLew	5:f6afbd3fc47a	1389	RCC_ExCLKInitStruct.PLLSAI1.PLLSAI1ClockOut = RCC_PLLSAI1_SAI1CLK;
EricLew	5:f6afbd3fc47a	1390	RCC_ExCLKInitStruct.Sai1ClockSelection = RCC_SAI1CLKSOURCE_PLLSAI1;
EricLew	5:f6afbd3fc47a	1391	}
EricLew	5:f6afbd3fc47a	1392
EricLew	5:f6afbd3fc47a	1393	if (HAL_RCCEx_PeriphCLKConfig(&RCC_ExCLKInitStruct) != HAL_OK)
EricLew	5:f6afbd3fc47a	1394	{
EricLew	5:f6afbd3fc47a	1395	return AUDIO_ERROR;
EricLew	5:f6afbd3fc47a	1396	}
EricLew	5:f6afbd3fc47a	1397
EricLew	5:f6afbd3fc47a	1398	return AUDIO_OK;
EricLew	5:f6afbd3fc47a	1399	}
EricLew	5:f6afbd3fc47a	1400
EricLew	5:f6afbd3fc47a	1401	/**
EricLew	5:f6afbd3fc47a	1402	* @}
EricLew	5:f6afbd3fc47a	1403	*/
EricLew	5:f6afbd3fc47a	1404
EricLew	5:f6afbd3fc47a	1405	/**
EricLew	5:f6afbd3fc47a	1406	* @}
EricLew	5:f6afbd3fc47a	1407	*/
EricLew	5:f6afbd3fc47a	1408
EricLew	5:f6afbd3fc47a	1409	/**
EricLew	5:f6afbd3fc47a	1410	* @}
EricLew	5:f6afbd3fc47a	1411	*/
EricLew	5:f6afbd3fc47a	1412
EricLew	5:f6afbd3fc47a	1413	/**
EricLew	5:f6afbd3fc47a	1414	* @}
EricLew	5:f6afbd3fc47a	1415	*/
EricLew	5:f6afbd3fc47a	1416
EricLew	5:f6afbd3fc47a	1417	/**
EricLew	5:f6afbd3fc47a	1418	* @}
EricLew	5:f6afbd3fc47a	1419	*/
EricLew	5:f6afbd3fc47a	1420
EricLew	5:f6afbd3fc47a	1421	/********************** (C) COPYRIGHT STMicroelectronics *END OF FILE**/
EricLew	5:f6afbd3fc47a	1422

Repository toolbox

Export to desktop IDE

Build repository

Repository details

Type:	Program
Created:	03 Dec 2015
Imports:	47
Forks:	0
Commits:	6
Dependents:	0
Dependencies:	2
Followers:	10

stm32l4xx_nucleo_audio.c@5:f6afbd3fc47a, 2015-12-05 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning