Eric Lewiston
Hal Drivers for L4
Dependents: BSP OneHopeOnePrayer FINAL_AUDIO_RECORD AudioDemo
Fork of
STM32L4xx_HAL_Driver
by 
Senior Design: Sound Monitor
Diff: Src/stm32l4xx_hal_sai.c
- Revision:
- 0:80ee8f3b695e
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Src/stm32l4xx_hal_sai.c Mon Nov 02 19:37:23 2015 +0000
@@ -0,0 +1,1905 @@
+/**
+ ******************************************************************************
+ * @file stm32l4xx_hal_sai.c
+ * @author MCD Application Team
+ * @version V1.1.0
+ * @date 16-September-2015
+ * @brief SAI HAL module driver.
+ * This file provides firmware functions to manage the following
+ * functionalities of the Serial Audio Interface (SAI) peripheral:
+ * + Initialization/de-initialization functions
+ * + I/O operation functions
+ * + Peripheral Control functions
+ * + Peripheral State functions
+ *
+ @verbatim
+ ==============================================================================
+ ##### How to use this driver #####
+ ==============================================================================
+ [..]
+ The SAI HAL driver can be used as follows:
+
+ (#) Declare a SAI_HandleTypeDef handle structure (eg. SAI_HandleTypeDef hsai).
+ (#) Initialize the SAI low level resources by implementing the HAL_SAI_MspInit() API:
+ (##) Enable the SAI interface clock.
+ (##) SAI pins configuration:
+ (+++) Enable the clock for the SAI GPIOs.
+ (+++) Configure these SAI pins as alternate function pull-up.
+ (##) NVIC configuration if you need to use interrupt process (HAL_SAI_Transmit_IT()
+ and HAL_SAI_Receive_IT() APIs):
+ (+++) Configure the SAI interrupt priority.
+ (+++) Enable the NVIC SAI IRQ handle.
+
+ (##) DMA Configuration if you need to use DMA process (HAL_SAI_Transmit_DMA()
+ and HAL_SAI_Receive_DMA() APIs):
+ (+++) Declare a DMA handle structure for the Tx/Rx channel.
+ (+++) Enable the DMAx interface clock.
+ (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
+ (+++) Configure the DMA Tx/Rx Channel.
+ (+++) Associate the initialized DMA handle to the SAI DMA Tx/Rx handle.
+ (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the
+ DMA Tx/Rx Channel.
+
+ (#) The initialization can be done by two ways
+ (##) Expert mode : Initialize the structures Init, FrameInit and SlotInit and call HAL_SAI_Init().
+ (##) Simplified mode : Initialize the high part of Init Structure and call HAL_SAI_InitProtocol().
+
+ [..]
+ (@) The specific SAI interrupts (FIFO request and Overrun underrun interrupt)
+ will be managed using the macros __HAL_SAI_ENABLE_IT() and __HAL_SAI_DISABLE_IT()
+ inside the transmit and receive process.
+
+ [..]
+ (@) Make sure that either:
+ (+@) PLLSAI1CLK output is configured or
+ (+@) PLLSAI2CLK output is configured or
+ (+@) PLLSAI3CLK output is configured or
+ (+@) External clock source is configured after setting correctly
+ the define constant EXTERNAL_SAI1_CLOCK_VALUE or EXTERNAL_SAI2_CLOCK_VALUE in the stm32l4xx_hal_conf.h file.
+
+ [..]
+ (@) In master Tx mode: enabling the audio block immediately generates the bit clock
+ for the external slaves even if there is no data in the FIFO, However FS signal
+ generation is conditioned by the presence of data in the FIFO.
+
+ [..]
+ (@) In master Rx mode: enabling the audio block immediately generates the bit clock
+ and FS signal for the external slaves.
+
+ [..]
+ (@) It is mandatory to respect the following conditions in order to avoid bad SAI behavior:
+ (+@) First bit Offset <= (SLOT size - Data size)
+ (+@) Data size <= SLOT size
+ (+@) Number of SLOT x SLOT size = Frame length
+ (+@) The number of slots should be even when SAI_FS_CHANNEL_IDENTIFICATION is selected.
+
+ [..]
+ Three operation modes are available within this driver :
+
+ *** Polling mode IO operation ***
+ =================================
+ [..]
+ (+) Send an amount of data in blocking mode using HAL_SAI_Transmit()
+ (+) Receive an amount of data in blocking mode using HAL_SAI_Receive()
+
+ *** Interrupt mode IO operation ***
+ ===================================
+ [..]
+ (+) Send an amount of data in non-blocking mode using HAL_SAI_Transmit_IT()
+ (+) At transmission end of transfer HAL_SAI_TxCpltCallback() is executed and user can
+ add his own code by customization of function pointer HAL_SAI_TxCpltCallback()
+ (+) Receive an amount of data in non-blocking mode using HAL_SAI_Receive_IT()
+ (+) At reception end of transfer HAL_SAI_RxCpltCallback() is executed and user can
+ add his own code by customization of function pointer HAL_SAI_RxCpltCallback()
+ (+) In case of flag error, HAL_SAI_ErrorCallback() function is executed and user can
+ add his own code by customization of function pointer HAL_SAI_ErrorCallback()
+
+ *** DMA mode IO operation ***
+ ==============================
+ [..]
+ (+) Send an amount of data in non-blocking mode (DMA) using HAL_SAI_Transmit_DMA()
+ (+) At transmission end of transfer HAL_SAI_TxCpltCallback() is executed and user can
+ add his own code by customization of function pointer HAL_SAI_TxCpltCallback()
+ (+) Receive an amount of data in non-blocking mode (DMA) using HAL_SAI_Receive_DMA()
+ (+) At reception end of transfer HAL_SAI_RxCpltCallback() is executed and user can
+ add his own code by customization of function pointer HAL_SAI_RxCpltCallback()
+ (+) In case of flag error, HAL_SAI_ErrorCallback() function is executed and user can
+ add his own code by customization of function pointer HAL_SAI_ErrorCallback()
+ (+) Pause the DMA Transfer using HAL_SAI_DMAPause()
+ (+) Resume the DMA Transfer using HAL_SAI_DMAResume()
+ (+) Stop the DMA Transfer using HAL_SAI_DMAStop()
+
+ *** SAI HAL driver additional function list ***
+ =================================================
+ [..]
+ Below the list the others API available SAI HAL driver :
+
+ (+) HAL_SAI_EnableTxMuteMode(): Enable the mute in tx mode
+ (+) HAL_SAI_DisableTxMuteMode(): Disable the mute in tx mode
+ (+) HAL_SAI_EnableRxMuteMode(): Enable the mute in Rx mode
+ (+) HAL_SAI_DisableRxMuteMode(): Disable the mute in Rx mode
+ (+) HAL_SAI_FlushRxFifo(): Flush the rx fifo.
+ (+) HAL_SAI_Abort(): Abort the current transfer
+
+ *** SAI HAL driver macros list ***
+ =============================================
+ [..]
+ Below the list of most used macros in SAI HAL driver :
+
+ (+) __HAL_SAI_ENABLE(): Enable the SAI peripheral
+ (+) __HAL_SAI_DISABLE(): Disable the SAI peripheral
+ (+) __HAL_SAI_ENABLE_IT(): Enable the specified SAI interrupts
+ (+) __HAL_SAI_DISABLE_IT(): Disable the specified SAI interrupts
+ (+) __HAL_SAI_GET_IT_SOURCE(): Check if the specified SAI interrupt source is
+ enabled or disabled
+ (+) __HAL_SAI_GET_FLAG(): Check whether the specified SAI flag is set or not
+
+ @endverbatim
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l4xx_hal.h"
+
+/** @addtogroup STM32L4xx_HAL_Driver
+ * @{
+ */
+
+/** @defgroup SAI SAI
+ * @brief SAI HAL module driver
+ * @{
+ */
+
+#ifdef HAL_SAI_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/** @defgroup SAI_Private_Typedefs SAI Private Typedefs
+ * @{
+ */
+typedef enum {
+ SAI_MODE_DMA,
+ SAI_MODE_IT
+}SAI_ModeTypedef;
+/**
+ * @}
+ */
+
+/* Private define ------------------------------------------------------------*/
+/** @defgroup SAI_Private_Constants SAI Private Constants
+ * @{
+ */
+#define SAI_FIFO_SIZE 8
+#define SAI_DEFAULT_TIMEOUT 4
+/**
+ * @}
+ */
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/** @defgroup SAI_Private_Functions SAI Private Functions
+ * @{
+ */
+static void SAI_FillFifo(SAI_HandleTypeDef *hsai);
+static int32_t SAI_InterruptFlag(SAI_HandleTypeDef *hsai, uint32_t mode);
+static HAL_StatusTypeDef SAI_InitI2S(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot);
+static HAL_StatusTypeDef SAI_InitPCM(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot);
+
+static HAL_StatusTypeDef SAI_Disable(SAI_HandleTypeDef *hsai);
+static void SAI_Transmit_IT8Bit(SAI_HandleTypeDef *hsai);
+static void SAI_Transmit_IT16Bit(SAI_HandleTypeDef *hsai);
+static void SAI_Transmit_IT32Bit(SAI_HandleTypeDef *hsai);
+static void SAI_Receive_IT8Bit(SAI_HandleTypeDef *hsai);
+static void SAI_Receive_IT16Bit(SAI_HandleTypeDef *hsai);
+static void SAI_Receive_IT32Bit(SAI_HandleTypeDef *hsai);
+static void SAI_DMATxCplt(DMA_HandleTypeDef *hdma);
+static void SAI_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
+static void SAI_DMARxCplt(DMA_HandleTypeDef *hdma);
+static void SAI_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
+static void SAI_DMAError(DMA_HandleTypeDef *hdma);
+/**
+ * @}
+ */
+
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup SAI_Exported_Functions SAI Exported Functions
+ * @{
+ */
+
+/** @defgroup SAI_Exported_Functions_Group1 Initialization and de-initialization functions
+ * @brief Initialization and Configuration functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Initialization and de-initialization functions #####
+ ===============================================================================
+ [..] This subsection provides a set of functions allowing to initialize and
+ de-initialize the SAIx peripheral:
+
+ (+) User must implement HAL_SAI_MspInit() function in which he configures
+ all related peripherals resources (CLOCK, GPIO, DMA, IT and NVIC ).
+
+ (+) Call the function HAL_SAI_Init() to configure the selected device with
+ the selected configuration:
+ (++) Mode (Master/slave TX/RX)
+ (++) Protocol
+ (++) Data Size
+ (++) MCLK Output
+ (++) Audio frequency
+ (++) FIFO Threshold
+ (++) Frame Config
+ (++) Slot Config
+
+ (+) Call the function HAL_SAI_DeInit() to restore the default configuration
+ of the selected SAI peripheral.
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Initialize the structure FrameInit, SlotInit and the low part of
+ * Init according to the specified parameters and call the function
+ * HAL_SAI_Init to initialize the SAI block.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param protocol: one of the supported protocol @ref SAI_Protocol
+ * @param datasize: one of the supported datasize @ref SAI_Protocol_DataSize
+ * the configuration information for SAI module.
+ * @param nbslot: Number of slot.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_InitProtocol(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot)
+{
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ switch(protocol)
+ {
+ case SAI_I2S_STANDARD :
+ case SAI_I2S_MSBJUSTIFIED :
+ case SAI_I2S_LSBJUSTIFIED :
+ errorcode = SAI_InitI2S(hsai, protocol, datasize, nbslot);
+ break;
+ case SAI_PCM_LONG :
+ case SAI_PCM_SHORT :
+ errorcode = SAI_InitPCM(hsai, protocol, datasize, nbslot);
+ break;
+ default :
+ errorcode = HAL_ERROR;
+ break;
+ }
+
+ if(errorcode == HAL_OK)
+ {
+ errorcode = HAL_SAI_Init(hsai);
+ }
+
+ return errorcode;
+}
+
+/**
+ * @brief Initialize the SAI according to the specified parameters
+ * in the SAI_InitTypeDef structure and initialize the associated handle.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Init(SAI_HandleTypeDef *hsai)
+{
+ uint32_t tmpregisterGCR = 0;
+
+ /* Check the SAI handle allocation */
+ if(hsai == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* check the instance */
+ assert_param(IS_SAI_ALL_INSTANCE(hsai->Instance));
+
+ /* Check the SAI Block parameters */
+ assert_param(IS_SAI_AUDIO_FREQUENCY(hsai->Init.AudioFrequency));
+ assert_param(IS_SAI_BLOCK_PROTOCOL(hsai->Init.Protocol));
+ assert_param(IS_SAI_BLOCK_MODE(hsai->Init.AudioMode));
+ assert_param(IS_SAI_BLOCK_DATASIZE(hsai->Init.DataSize));
+ assert_param(IS_SAI_BLOCK_FIRST_BIT(hsai->Init.FirstBit));
+ assert_param(IS_SAI_BLOCK_CLOCK_STROBING(hsai->Init.ClockStrobing));
+ assert_param(IS_SAI_BLOCK_SYNCHRO(hsai->Init.Synchro));
+ assert_param(IS_SAI_BLOCK_OUTPUT_DRIVE(hsai->Init.OutputDrive));
+ assert_param(IS_SAI_BLOCK_NODIVIDER(hsai->Init.NoDivider));
+ assert_param(IS_SAI_BLOCK_FIFO_THRESHOLD(hsai->Init.FIFOThreshold));
+ assert_param(IS_SAI_MONOSTEREO_MODE(hsai->Init.MonoStereoMode));
+ assert_param(IS_SAI_BLOCK_COMPANDING_MODE(hsai->Init.CompandingMode));
+ assert_param(IS_SAI_BLOCK_TRISTATE_MANAGEMENT(hsai->Init.TriState));
+ assert_param(IS_SAI_BLOCK_SYNCEXT(hsai->Init.SynchroExt));
+
+ /* Check the SAI Block Frame parameters */
+ assert_param(IS_SAI_BLOCK_FRAME_LENGTH(hsai->FrameInit.FrameLength));
+ assert_param(IS_SAI_BLOCK_ACTIVE_FRAME(hsai->FrameInit.ActiveFrameLength));
+ assert_param(IS_SAI_BLOCK_FS_DEFINITION(hsai->FrameInit.FSDefinition));
+ assert_param(IS_SAI_BLOCK_FS_POLARITY(hsai->FrameInit.FSPolarity));
+ assert_param(IS_SAI_BLOCK_FS_OFFSET(hsai->FrameInit.FSOffset));
+
+ /* Check the SAI Block Slot parameters */
+ assert_param(IS_SAI_BLOCK_FIRSTBIT_OFFSET(hsai->SlotInit.FirstBitOffset));
+ assert_param(IS_SAI_BLOCK_SLOT_SIZE(hsai->SlotInit.SlotSize));
+ assert_param(IS_SAI_BLOCK_SLOT_NUMBER(hsai->SlotInit.SlotNumber));
+ assert_param(IS_SAI_SLOT_ACTIVE(hsai->SlotInit.SlotActive));
+
+ if(hsai->State == HAL_SAI_STATE_RESET)
+ {
+ /* Allocate lock resource and initialize it */
+ hsai->Lock = HAL_UNLOCKED;
+
+ /* Init the low level hardware : GPIO, CLOCK, NVIC and DMA */
+ HAL_SAI_MspInit(hsai);
+ }
+
+ hsai->State = HAL_SAI_STATE_BUSY;
+
+ /* Disable the selected SAI peripheral */
+ SAI_Disable(hsai);
+
+ /* SAI Block Synchro Configuration ---------------------------------------------------*/
+ /* This setting must be done with both audio block (A & B) disabled */
+ switch(hsai->Init.SynchroExt)
+ {
+ case SAI_SYNCEXT_DISABLE :
+ tmpregisterGCR = 0;
+ break;
+ case SAI_SYNCEXT_IN_ENABLE :
+ tmpregisterGCR = SAI_GCR_SYNCIN_0;
+ break;
+ case SAI_SYNCEXT_OUTBLOCKA_ENABLE :
+ tmpregisterGCR = SAI_GCR_SYNCOUT_0;
+ break;
+ case SAI_SYNCEXT_OUTBLOCKB_ENABLE :
+ tmpregisterGCR = SAI_GCR_SYNCOUT_1;
+ break;
+ }
+
+ if((hsai->Instance == SAI1_Block_A) || (hsai->Instance == SAI1_Block_B))
+ {
+ SAI1->GCR = tmpregisterGCR;
+ }
+ else
+ {
+ SAI2->GCR = tmpregisterGCR;
+ }
+
+ if(hsai->Init.AudioFrequency != SAI_AUDIO_FREQUENCY_MCKDIV)
+ {
+ uint32_t freq = 0;
+ uint32_t tmpval;
+ /* In this case, the MCKDIV value is calculated to get AudioFrequency */
+ if((hsai->Instance == SAI1_Block_A ) || (hsai->Instance == SAI1_Block_B ))
+ {
+ freq = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_SAI1);
+ }
+ if((hsai->Instance == SAI2_Block_A ) || (hsai->Instance == SAI2_Block_B ))
+ {
+ freq = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_SAI2);
+ }
+
+ /* Configure Master Clock using the following formula :
+ MCLK_x = SAI_CK_x / (MCKDIV[3:0] * 2) with MCLK_x = 256 * FS
+ FS = SAI_CK_x / (MCKDIV[3:0] * 2) * 256
+ MCKDIV[3:0] = SAI_CK_x / FS * 512 */
+ /* (freq x 10) to keep Significant digits */
+ tmpval = (freq * 10) / (hsai->Init.AudioFrequency * 2 * 256);
+ hsai->Init.Mckdiv = tmpval / 10;
+
+ /* Round result to the nearest integer */
+ if((tmpval % 10) > 8)
+ {
+ hsai->Init.Mckdiv+= 1;
+ }
+ }
+
+ /* SAI Block Configuration ------------------------------------------------------------*/
+ /* SAI CR1 Configuration */
+ hsai->Instance->CR1&=~(SAI_xCR1_MODE | SAI_xCR1_PRTCFG | SAI_xCR1_DS | \
+ SAI_xCR1_LSBFIRST | SAI_xCR1_CKSTR | SAI_xCR1_SYNCEN |\
+ SAI_xCR1_MONO | SAI_xCR1_OUTDRIV | SAI_xCR1_DMAEN | \
+ SAI_xCR1_NODIV | SAI_xCR1_MCKDIV);
+
+ hsai->Instance->CR1|=(hsai->Init.AudioMode | hsai->Init.Protocol | \
+ hsai->Init.DataSize | hsai->Init.FirstBit | \
+ hsai->Init.ClockStrobing | hsai->Init.Synchro | \
+ hsai->Init.MonoStereoMode | hsai->Init.OutputDrive | \
+ hsai->Init.NoDivider | (hsai->Init.Mckdiv << 20) | hsai->Init.CompandingMode);
+
+ /* SAI CR2 Configuration */
+ hsai->Instance->CR2&= ~(SAI_xCR2_FTH | SAI_xCR2_FFLUSH | SAI_xCR2_COMP);
+ hsai->Instance->CR2|= (hsai->Init.FIFOThreshold | hsai->Init.CompandingMode | hsai->Init.TriState);
+
+
+ /* SAI Frame Configuration -----------------------------------------*/
+ hsai->Instance->FRCR&=(~(SAI_xFRCR_FRL | SAI_xFRCR_FSALL | SAI_xFRCR_FSDEF | \
+ SAI_xFRCR_FSPO | SAI_xFRCR_FSOFF));
+ hsai->Instance->FRCR|=((hsai->FrameInit.FrameLength - 1) |
+ hsai->FrameInit.FSOffset |
+ hsai->FrameInit.FSDefinition |
+ hsai->FrameInit.FSPolarity |
+ ((hsai->FrameInit.ActiveFrameLength - 1) << 8));
+
+ /* SAI Block_x SLOT Configuration ------------------------------------------*/
+ /* This register has no meaning in AC 97 and SPDIF audio protocol */
+ hsai->Instance->SLOTR&= (~(SAI_xSLOTR_FBOFF | SAI_xSLOTR_SLOTSZ | \
+ SAI_xSLOTR_NBSLOT | SAI_xSLOTR_SLOTEN ));
+
+ hsai->Instance->SLOTR|= hsai->SlotInit.FirstBitOffset | hsai->SlotInit.SlotSize
+ | hsai->SlotInit.SlotActive | ((hsai->SlotInit.SlotNumber - 1) << 8);
+
+ /* Initialize the error code */
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+
+ /* Initialize the SAI state */
+ hsai->State= HAL_SAI_STATE_READY;
+
+ /* Release Lock */
+ __HAL_UNLOCK(hsai);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief DeInitialize the SAI peripheral.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_DeInit(SAI_HandleTypeDef *hsai)
+{
+ /* Check the SAI handle allocation */
+ if(hsai == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ hsai->State = HAL_SAI_STATE_BUSY;
+
+ /* Disabled All interrupt and clear all the flag */
+ hsai->Instance->IMR = 0;
+ hsai->Instance->CLRFR = 0xFFFFFFFF;
+
+ /* Disable the SAI */
+ SAI_Disable(hsai);
+
+ /* Flush the fifo */
+ SET_BIT(hsai->Instance->CR2, SAI_xCR2_FFLUSH);
+
+ /* DeInit the low level hardware: GPIO, CLOCK, NVIC and DMA */
+ HAL_SAI_MspDeInit(hsai);
+
+ /* Initialize the error code */
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+
+ /* Initialize the SAI state */
+ hsai->State = HAL_SAI_STATE_RESET;
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Initialize the SAI MSP.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+__weak void HAL_SAI_MspInit(SAI_HandleTypeDef *hsai)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_SAI_MspInit could be implemented in the user file
+ */
+}
+
+/**
+ * @brief DeInitialize the SAI MSP.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+__weak void HAL_SAI_MspDeInit(SAI_HandleTypeDef *hsai)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_SAI_MspDeInit could be implemented in the user file
+ */
+}
+
+/**
+ * @}
+ */
+
+/** @defgroup SAI_Exported_Functions_Group2 IO operation functions
+ * @brief Data transfers functions
+ *
+@verbatim
+ ===============================================================================
+ ##### IO operation functions #####
+ ===============================================================================
+ [..]
+ This subsection provides a set of functions allowing to manage the SAI data
+ transfers.
+
+ (+) There are two modes of transfer:
+ (++) Blocking mode : The communication is performed in the polling mode.
+ The status of all data processing is returned by the same function
+ after finishing transfer.
+ (++) No-Blocking mode : The communication is performed using Interrupts
+ or DMA. These functions return the status of the transfer startup.
+ The end of the data processing will be indicated through the
+ dedicated SAI IRQ when using Interrupt mode or the DMA IRQ when
+ using DMA mode.
+
+ (+) Blocking mode functions are :
+ (++) HAL_SAI_Transmit()
+ (++) HAL_SAI_Receive()
+ (++) HAL_SAI_TransmitReceive()
+
+ (+) Non Blocking mode functions with Interrupt are :
+ (++) HAL_SAI_Transmit_IT()
+ (++) HAL_SAI_Receive_IT()
+ (++) HAL_SAI_TransmitReceive_IT()
+
+ (+) Non Blocking mode functions with DMA are :
+ (++) HAL_SAI_Transmit_DMA()
+ (++) HAL_SAI_Receive_DMA()
+ (++) HAL_SAI_TransmitReceive_DMA()
+
+ (+) A set of Transfer Complete Callbacks are provided in non Blocking mode:
+ (++) HAL_SAI_TxCpltCallback()
+ (++) HAL_SAI_RxCpltCallback()
+ (++) HAL_SAI_ErrorCallback()
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Transmit an amount of data in blocking mode.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param pData: Pointer to data buffer
+ * @param Size: Amount of data to be sent
+ * @param Timeout: Timeout duration
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Transmit(SAI_HandleTypeDef *hsai, uint8_t* pData, uint16_t Size, uint32_t Timeout)
+{
+ uint32_t tickstart = HAL_GetTick();
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ if((pData == NULL ) || (Size == 0))
+ {
+ errorcode = HAL_ERROR;
+ goto error;
+ }
+
+ if(hsai->State != HAL_SAI_STATE_READY)
+ {
+ errorcode = HAL_BUSY;
+ goto error;
+ }
+
+ hsai->State = HAL_SAI_STATE_BUSY_TX;
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+ hsai->XferSize = Size;
+ hsai->XferCount = Size;
+ hsai->pBuffPtr = pData;
+
+ /* Check if the SAI is already enabled */
+ if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
+ {
+ /* fill the fifo with data before to enabled the SAI */
+ SAI_FillFifo(hsai);
+ /* Enable SAI peripheral */
+ __HAL_SAI_ENABLE(hsai);
+ }
+
+ do
+ {
+ /* Write data if the FIFO is not full */
+ if((hsai->Instance->SR & SAI_xSR_FLVL) != SAI_FIFOSTATUS_FULL)
+ {
+ if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
+ {
+ hsai->Instance->DR = (*hsai->pBuffPtr++);
+ }
+ else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
+ {
+ *(uint16_t *)&hsai->Instance->DR = *((uint16_t *)hsai->pBuffPtr);
+ hsai->pBuffPtr+= 2;
+ }
+ else
+ {
+ hsai->Instance->DR = *((uint32_t *)hsai->pBuffPtr);
+ hsai->pBuffPtr+= 4;
+ }
+ hsai->XferCount--;
+ }
+ else
+ {
+ /* Check for the Timeout */
+ if((Timeout != HAL_MAX_DELAY) && ((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout)))
+ {
+ errorcode = HAL_TIMEOUT;
+ goto error;
+ }
+ }
+ }
+ while(0 != hsai->XferCount);
+
+error :
+ hsai->State = HAL_SAI_STATE_READY;
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+ return errorcode;
+}
+
+/**
+ * @brief Receive an amount of data in blocking mode.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param pData: Pointer to data buffer
+ * @param Size: Amount of data to be received
+ * @param Timeout: Timeout duration
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Receive(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size, uint32_t Timeout)
+{
+ uint32_t tickstart = HAL_GetTick();
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ if((pData == NULL ) || (Size == 0))
+ {
+ errorcode = HAL_ERROR;
+ goto error;
+ }
+
+ if(hsai->State != HAL_SAI_STATE_READY)
+ {
+ errorcode = HAL_BUSY;
+ goto error;
+ }
+
+ hsai->pBuffPtr = pData;
+ hsai->XferSize = Size;
+ hsai->XferCount = Size;
+ hsai->State = HAL_SAI_STATE_BUSY_RX;
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+
+ /* Check if the SAI is already enabled */
+ if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
+ {
+ /* Enable SAI peripheral */
+ __HAL_SAI_ENABLE(hsai);
+ }
+
+ /* Receive data */
+ do
+ {
+ /* Wait until RXNE flag is set */
+ if((hsai->Instance->SR & SAI_xSR_FLVL) != SAI_FIFOSTATUS_EMPTY)
+ {
+ if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
+ {
+ (*hsai->pBuffPtr++) = hsai->Instance->DR;
+ }
+ else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
+ {
+ *((uint16_t*)hsai->pBuffPtr) = hsai->Instance->DR;
+ hsai->pBuffPtr+= 2;
+ }
+ else
+ {
+ *((uint32_t*)hsai->pBuffPtr) = hsai->Instance->DR;
+ hsai->pBuffPtr+= 4;
+ }
+ hsai->XferCount--;
+ }
+ else
+ {
+ /* Check for the Timeout */
+ if((Timeout != HAL_MAX_DELAY) && ((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout)))
+ {
+ errorcode = HAL_TIMEOUT;
+ goto error;
+ }
+ }
+ }
+ while(0 != hsai->XferCount);
+
+error :
+ hsai->State = HAL_SAI_STATE_READY;
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+ return errorcode;
+}
+
+/**
+ * @brief Transmit an amount of data in non-blocking mode with Interrupt.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param pData: Pointer to data buffer
+ * @param Size: Amount of data to be sent
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Transmit_IT(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
+{
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ if((pData == NULL) || (Size == 0))
+ {
+ errorcode = HAL_ERROR;
+ goto error;
+ }
+
+ if(hsai->State != HAL_SAI_STATE_READY)
+ {
+ errorcode = HAL_BUSY;
+ goto error;
+ }
+
+ hsai->pBuffPtr = pData;
+ hsai->XferSize = Size;
+ hsai->XferCount = Size;
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+ hsai->State = HAL_SAI_STATE_BUSY_TX;
+ if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
+ {
+ hsai->InterruptServiceRoutine = SAI_Transmit_IT8Bit;
+ }
+ else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
+ {
+ hsai->InterruptServiceRoutine = SAI_Transmit_IT16Bit;
+ }
+ else
+ {
+ hsai->InterruptServiceRoutine = SAI_Transmit_IT32Bit;
+ }
+
+ /* Enable FRQ and OVRUDR interrupts */
+ __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+
+ /* Check if the SAI is already enabled */
+ if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
+ {
+ /* Fill the fifo before starting the communication */
+ SAI_FillFifo(hsai);
+ /* Enable SAI peripheral */
+ __HAL_SAI_ENABLE(hsai);
+ }
+
+error :
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+ return errorcode;
+}
+
+/**
+ * @brief Receive an amount of data in non-blocking mode with Interrupt.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param pData: Pointer to data buffer
+ * @param Size: Amount of data to be received
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Receive_IT(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
+{
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ if((pData == NULL) || (Size == 0))
+ {
+ errorcode = HAL_ERROR;
+ goto error;
+ }
+
+ if(hsai->State != HAL_SAI_STATE_READY)
+ {
+ errorcode = HAL_BUSY;
+ goto error;
+ }
+
+ hsai->pBuffPtr = pData;
+ hsai->XferSize = Size;
+ hsai->XferCount = Size;
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+ hsai->State = HAL_SAI_STATE_BUSY_RX;
+ if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
+ {
+ hsai->InterruptServiceRoutine = SAI_Receive_IT8Bit;
+ }
+ else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
+ {
+ hsai->InterruptServiceRoutine = SAI_Receive_IT16Bit;
+ }
+ else
+ {
+ hsai->InterruptServiceRoutine = SAI_Receive_IT32Bit;
+ }
+
+ /* Enable the interrupts */
+ __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+
+ /* Check if the SAI is already enabled */
+ if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
+ {
+ /* Enable SAI peripheral */
+ __HAL_SAI_ENABLE(hsai);
+ }
+
+error :
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+ return errorcode;
+}
+
+/**
+ * @brief Pause the audio stream playing from the Media.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_DMAPause(SAI_HandleTypeDef *hsai)
+{
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ /* Pause the audio file playing by disabling the SAI DMA requests */
+ hsai->Instance->CR1 &= ~SAI_xCR1_DMAEN;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Resume the audio stream playing from the Media.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_DMAResume(SAI_HandleTypeDef *hsai)
+{
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ /* Enable the SAI DMA requests */
+ hsai->Instance->CR1 |= SAI_xCR1_DMAEN;
+
+ /* If the SAI peripheral is still not enabled, enable it */
+ if ((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
+ {
+ /* Enable SAI peripheral */
+ __HAL_SAI_ENABLE(hsai);
+ }
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Stop the audio stream playing from the Media.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_DMAStop(SAI_HandleTypeDef *hsai)
+{
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ /* Disable the SAI DMA request */
+ hsai->Instance->CR1 &= ~SAI_xCR1_DMAEN;
+
+ /* Abort the SAI DMA Channel */
+ if(hsai->hdmatx != NULL)
+ {
+ HAL_DMA_Abort(hsai->hdmatx);
+ }
+
+ if(hsai->hdmarx != NULL)
+ {
+ HAL_DMA_Abort(hsai->hdmarx);
+ }
+
+ /* Disable SAI peripheral */
+ SAI_Disable(hsai);
+
+ hsai->State = HAL_SAI_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Abort the current transfer and disable the SAI.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Abort(SAI_HandleTypeDef *hsai)
+{
+ /* Disable the SAI DMA request */
+ hsai->Instance->CR1 &= ~SAI_xCR1_DMAEN;
+
+ /* Abort the SAI DMA Channel */
+ if(hsai->hdmatx != NULL)
+ {
+ HAL_DMA_Abort(hsai->hdmatx);
+ }
+
+ if(hsai->hdmarx != NULL)
+ {
+ HAL_DMA_Abort(hsai->hdmarx);
+ }
+
+ /* Disabled All interrupt and clear all the flag */
+ hsai->Instance->IMR = 0;
+ hsai->Instance->CLRFR = 0xFFFFFFFF;
+
+ /* Disable SAI peripheral */
+ SAI_Disable(hsai);
+
+ /* Flush the fifo */
+ SET_BIT(hsai->Instance->CR2, SAI_xCR2_FFLUSH);
+
+ hsai->State = HAL_SAI_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Transmit an amount of data in non-blocking mode with DMA.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param pData: Pointer to data buffer
+ * @param Size: Amount of data to be sent
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Transmit_DMA(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
+{
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ if((pData == NULL) || (Size == 0))
+ {
+ errorcode = HAL_ERROR;
+ goto error;
+ }
+
+ if(hsai->State != HAL_SAI_STATE_READY)
+ {
+ errorcode = HAL_BUSY;
+ goto error;
+ }
+
+ hsai->pBuffPtr = pData;
+ hsai->XferSize = Size;
+ hsai->XferCount = Size;
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+ hsai->State = HAL_SAI_STATE_BUSY_TX;
+
+ /* Set the SAI Tx DMA Half transfer complete callback */
+ hsai->hdmatx->XferHalfCpltCallback = SAI_DMATxHalfCplt;
+
+ /* Set the SAI TxDMA transfer complete callback */
+ hsai->hdmatx->XferCpltCallback = SAI_DMATxCplt;
+
+ /* Set the DMA error callback */
+ hsai->hdmatx->XferErrorCallback = SAI_DMAError;
+
+ /* Enable the Tx DMA Channel */
+ HAL_DMA_Start_IT(hsai->hdmatx, (uint32_t)hsai->pBuffPtr, (uint32_t)&hsai->Instance->DR, hsai->XferSize);
+
+ /* Check if the SAI is already enabled */
+ if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
+ {
+ /* Enable SAI peripheral */
+ __HAL_SAI_ENABLE(hsai);
+ }
+
+ /* Enable the interrupts for error handling */
+ __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
+
+ /* Enable SAI Tx DMA Request */
+ hsai->Instance->CR1 |= SAI_xCR1_DMAEN;
+
+error :
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+ return errorcode;
+}
+
+/**
+ * @brief Receive an amount of data in non-blocking mode with DMA.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param pData: Pointer to data buffer
+ * @param Size: Amount of data to be received
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_Receive_DMA(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
+{
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ /* Process Locked */
+ __HAL_LOCK(hsai);
+
+ if((pData == NULL) || (Size == 0))
+ {
+ errorcode = HAL_ERROR;
+ goto error;
+ }
+
+ if(hsai->State != HAL_SAI_STATE_READY)
+ {
+ errorcode = HAL_BUSY;
+ goto error;
+ }
+ hsai->pBuffPtr = pData;
+ hsai->XferSize = Size;
+ hsai->XferCount = Size;
+ hsai->ErrorCode = HAL_SAI_ERROR_NONE;
+ hsai->State = HAL_SAI_STATE_BUSY_RX;
+
+ /* Set the SAI Rx DMA Half transfer complete callback */
+ hsai->hdmarx->XferHalfCpltCallback = SAI_DMARxHalfCplt;
+
+ /* Set the SAI Rx DMA transfer complete callback */
+ hsai->hdmarx->XferCpltCallback = SAI_DMARxCplt;
+
+ /* Set the DMA error callback */
+ hsai->hdmarx->XferErrorCallback = SAI_DMAError;
+
+ /* Enable the Rx DMA Channel */
+ HAL_DMA_Start_IT(hsai->hdmarx, (uint32_t)&hsai->Instance->DR, (uint32_t)hsai->pBuffPtr, hsai->XferSize);
+
+ /* Check if the SAI is already enabled */
+ if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
+ {
+ /* Enable SAI peripheral */
+ __HAL_SAI_ENABLE(hsai);
+ }
+
+ /* Enable the interrupts for error handling */
+ __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
+
+ /* Enable SAI Rx DMA Request */
+ hsai->Instance->CR1 |= SAI_xCR1_DMAEN;
+
+error :
+ /* Process Unlocked */
+ __HAL_UNLOCK(hsai);
+ return errorcode;
+}
+
+/**
+ * @brief Enable the Tx mute mode.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param val: value sent during the mute @ref SAI_Block_Mute_Value
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_EnableTxMuteMode(SAI_HandleTypeDef *hsai, uint16_t val)
+{
+ assert_param(IS_SAI_BLOCK_MUTE_VALUE(val));
+
+ if(hsai->State != HAL_SAI_STATE_RESET)
+ {
+ CLEAR_BIT(hsai->Instance->CR2, SAI_xCR2_MUTEVAL | SAI_xCR2_MUTE);
+ SET_BIT(hsai->Instance->CR2, SAI_xCR2_MUTE | val);
+ return HAL_OK;
+ }
+ return HAL_ERROR;
+}
+
+/**
+ * @brief Disable the Tx mute mode.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_DisableTxMuteMode(SAI_HandleTypeDef *hsai)
+{
+ if(hsai->State != HAL_SAI_STATE_RESET)
+ {
+ CLEAR_BIT(hsai->Instance->CR2, SAI_xCR2_MUTEVAL | SAI_xCR2_MUTE);
+ return HAL_OK;
+ }
+ return HAL_ERROR;
+}
+
+/**
+ * @brief Enable the Rx mute detection.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param callback: function called when the mute is detected
+ * @param counter: number a data before mute detection max 63.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_EnableRxMuteMode(SAI_HandleTypeDef *hsai, SAIcallback callback, uint16_t counter)
+{
+ assert_param(IS_SAI_BLOCK_MUTE_COUNTER(counter));
+
+ if(hsai->State != HAL_SAI_STATE_RESET)
+ {
+ /* set the mute counter */
+ CLEAR_BIT(hsai->Instance->CR2, SAI_xCR2_MUTECNT);
+ SET_BIT(hsai->Instance->CR2, ((uint32_t)counter << 6));
+ hsai->mutecallback = callback;
+ /* enable the IT interrupt */
+ __HAL_SAI_ENABLE_IT(hsai, SAI_IT_MUTEDET);
+ return HAL_OK;
+ }
+ return HAL_ERROR;
+}
+
+/**
+ * @brief Disable the Rx mute detection.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_SAI_DisableRxMuteMode(SAI_HandleTypeDef *hsai)
+{
+ if(hsai->State != HAL_SAI_STATE_RESET)
+ {
+ /* set the mutecallback to NULL */
+ hsai->mutecallback = (SAIcallback)NULL;
+ /* enable the IT interrupt */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_IT_MUTEDET);
+ return HAL_OK;
+ }
+ return HAL_ERROR;
+}
+
+/**
+ * @brief Handle SAI interrupt request.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+void HAL_SAI_IRQHandler(SAI_HandleTypeDef *hsai)
+{
+ if(hsai->State != HAL_SAI_STATE_RESET)
+ {
+ __IO uint32_t tmpFlag = hsai->Instance->SR;
+ __IO uint32_t tmpItSource = hsai->Instance->IMR;
+
+ if(((tmpFlag & SAI_xSR_FREQ) == SAI_xSR_FREQ) && ((tmpItSource & SAI_IT_FREQ) == SAI_IT_FREQ))
+ {
+ hsai->InterruptServiceRoutine(hsai);
+ goto exit;
+ }
+
+ /* check the flag only if one of them is set */
+ if(tmpFlag != 0x00000000)
+ {
+ /* SAI Overrun error interrupt occurred ----------------------------------*/
+ if(((tmpFlag & SAI_FLAG_OVRUDR) == SAI_FLAG_OVRUDR) && ((tmpItSource & SAI_IT_OVRUDR) == SAI_IT_OVRUDR))
+ {
+ /* Clear the SAI Overrun flag */
+ __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
+ /* Change the SAI error code */
+ hsai->ErrorCode = ((hsai->State == HAL_SAI_STATE_BUSY_RX) ? HAL_SAI_ERROR_OVR : HAL_SAI_ERROR_UDR);
+ /* the transfer is not stopped, we will forward the information to the user and we let the user decide what needs to be done */
+ HAL_SAI_ErrorCallback(hsai);
+ goto exit;
+ }
+
+ /* SAI mutedet interrupt occurred ----------------------------------*/
+ if(((tmpFlag & SAI_FLAG_MUTEDET) == SAI_FLAG_MUTEDET) && ((tmpItSource & SAI_IT_MUTEDET) == SAI_IT_MUTEDET))
+ {
+ /* Clear the SAI mutedet flag */
+ __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_MUTEDET);
+ /* call the call back function */
+ if(hsai->mutecallback != (SAIcallback)NULL)
+ {
+ /* inform the user that an RX mute event has been detected */
+ hsai->mutecallback();
+ }
+ goto exit;
+ }
+
+ /* SAI AFSDET interrupt occurred ----------------------------------*/
+ if(((tmpFlag & SAI_FLAG_AFSDET) == SAI_FLAG_AFSDET) && ((tmpItSource & SAI_IT_AFSDET) == SAI_IT_AFSDET))
+ {
+ /* Change the SAI error code */
+ hsai->ErrorCode = HAL_SAI_ERROR_AFSDET;
+ goto error;
+ }
+
+ /* SAI LFSDET interrupt occurred ----------------------------------*/
+ if(((tmpFlag & SAI_FLAG_LFSDET) == SAI_FLAG_LFSDET) && ((tmpItSource & SAI_IT_LFSDET) == SAI_IT_LFSDET))
+ {
+ /* Change the SAI error code */
+ hsai->ErrorCode = HAL_SAI_ERROR_LFSDET;
+ goto error;
+ }
+
+ /* SAI WCKCFG interrupt occurred ----------------------------------*/
+ if(((tmpFlag & SAI_FLAG_WCKCFG) == SAI_FLAG_WCKCFG) && ((tmpItSource & SAI_IT_WCKCFG) == SAI_IT_WCKCFG))
+ {
+ /* Change the SAI error code */
+ hsai->ErrorCode = HAL_SAI_ERROR_WCKCFG;
+ goto error;
+ }
+ }
+ }
+
+exit :
+ return;
+error :
+ /* Abort the current communication, disable the SAI block, and clear all the flags */
+ HAL_SAI_Abort(hsai);
+ HAL_SAI_ErrorCallback(hsai);
+ return;
+}
+
+/**
+ * @brief Tx Transfer completed callback.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+ __weak void HAL_SAI_TxCpltCallback(SAI_HandleTypeDef *hsai)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_SAI_TxCpltCallback could be implemented in the user file
+ */
+}
+
+/**
+ * @brief Tx Transfer Half completed callback.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+ __weak void HAL_SAI_TxHalfCpltCallback(SAI_HandleTypeDef *hsai)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_SAI_TxHalfCpltCallback could be implemented in the user file
+ */
+}
+
+/**
+ * @brief Rx Transfer completed callback.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+__weak void HAL_SAI_RxCpltCallback(SAI_HandleTypeDef *hsai)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_SAI_RxCpltCallback could be implemented in the user file
+ */
+}
+
+/**
+ * @brief Rx Transfer half completed callback.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+__weak void HAL_SAI_RxHalfCpltCallback(SAI_HandleTypeDef *hsai)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_SAI_RxCpltCallback could be implemented in the user file
+ */
+}
+
+/**
+ * @brief SAI error callback.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+__weak void HAL_SAI_ErrorCallback(SAI_HandleTypeDef *hsai)
+{
+ /* NOTE : This function should not be modified, when the callback is needed,
+ the HAL_SAI_ErrorCallback could be implemented in the user file
+ */
+}
+
+/**
+ * @}
+ */
+
+
+/** @defgroup SAI_Exported_Functions_Group3 Peripheral State functions
+ * @brief Peripheral State functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Peripheral State and Errors functions #####
+ ===============================================================================
+ [..]
+ This subsection permits to get in run-time the status of the peripheral
+ and the data flow.
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Return the SAI handle state.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval HAL state
+ */
+HAL_SAI_StateTypeDef HAL_SAI_GetState(SAI_HandleTypeDef *hsai)
+{
+ /* Return SAI handle state */
+ return hsai->State;
+}
+
+/**
+* @brief Return the SAI error code.
+* @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for the specified SAI Block.
+* @retval SAI Error Code
+*/
+uint32_t HAL_SAI_GetError(SAI_HandleTypeDef *hsai)
+{
+ return hsai->ErrorCode;
+}
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/** @addtogroup SAI_Private_Functions
+ * @brief Private functions
+ * @{
+ */
+/**
+ * @brief Initialize the SAI I2S protocol according to the specified parameters
+ * in the SAI_InitTypeDef and create the associated handle.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param protocol: one of the supported protocol
+ * @param datasize: one of the supported datasize @ref SAI_Protocol_DataSize
+ * the configuration information for SAI module.
+ * @param nbslot: number of slot minimum value is 2 and max is 16.
+ * the value must be a multiple of 2.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef SAI_InitI2S(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot)
+{
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ hsai->Init.Protocol = SAI_FREE_PROTOCOL;
+ hsai->Init.FirstBit = SAI_FIRSTBIT_MSB;
+ hsai->Init.ClockStrobing = SAI_CLOCKSTROBING_FALLINGEDGE;
+ hsai->FrameInit.FSDefinition = SAI_FS_CHANNEL_IDENTIFICATION;
+ hsai->SlotInit.SlotActive = SAI_SLOTACTIVE_ALL;
+ hsai->SlotInit.FirstBitOffset = 0;
+ hsai->SlotInit.SlotNumber = nbslot;
+
+ /* in IS2 the number of slot must be even */
+ if((nbslot & 0x1) != 0 )
+ {
+ return HAL_ERROR;
+ }
+
+ switch(protocol)
+ {
+ case SAI_I2S_STANDARD :
+ hsai->FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
+ hsai->FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT;
+ break;
+ case SAI_I2S_MSBJUSTIFIED :
+ case SAI_I2S_LSBJUSTIFIED :
+ hsai->FrameInit.FSPolarity = SAI_FS_ACTIVE_HIGH;
+ hsai->FrameInit.FSOffset = SAI_FS_FIRSTBIT;
+ break;
+ default :
+ return HAL_ERROR;
+ }
+
+ /* Frame definition */
+ hsai->Init.DataSize = 0xFFFFFFFF;
+ if(datasize == SAI_PROTOCOL_DATASIZE_16BIT)
+ {
+ hsai->Init.DataSize = SAI_DATASIZE_16;
+ hsai->FrameInit.FrameLength = 32*(nbslot/2);
+ hsai->FrameInit.ActiveFrameLength = 16*(nbslot/2);
+ hsai->SlotInit.SlotSize = SAI_SLOTSIZE_16B;
+ }
+ else if(datasize == SAI_PROTOCOL_DATASIZE_16BITEXTENDED)
+ {
+ if(hsai->Init.DataSize == 0xFFFFFFFF)
+ {
+ hsai->Init.DataSize = SAI_DATASIZE_16;
+ }
+ }
+ else if(datasize == SAI_PROTOCOL_DATASIZE_24BIT)
+ {
+ if(hsai->Init.DataSize == 0xFFFFFFFF)
+ {
+ hsai->Init.DataSize = SAI_DATASIZE_24;
+ }
+ }
+ else if(datasize == SAI_PROTOCOL_DATASIZE_32BIT)
+ {
+ if(hsai->Init.DataSize == 0xFFFFFFFF)
+ {
+ hsai->Init.DataSize = SAI_DATASIZE_32;
+ }
+ }
+ else
+ {
+ errorcode = HAL_ERROR;
+ }
+
+ if(errorcode == HAL_OK)
+ {
+ hsai->FrameInit.FrameLength = 64*(nbslot/2);
+ hsai->FrameInit.ActiveFrameLength = 32*(nbslot/2);
+ hsai->SlotInit.SlotSize = SAI_SLOTSIZE_32B;
+
+ if(protocol == SAI_I2S_LSBJUSTIFIED)
+ {
+ if (datasize == SAI_PROTOCOL_DATASIZE_16BITEXTENDED)
+ {
+ hsai->SlotInit.FirstBitOffset = 16;
+ }
+ else if (datasize == SAI_PROTOCOL_DATASIZE_24BIT)
+ {
+ hsai->SlotInit.FirstBitOffset = 8;
+ }
+ }
+ }
+
+ return errorcode;
+}
+
+/**
+ * @brief Initialize the SAI PCM protocol according to the specified parameters
+ * in the SAI_InitTypeDef and create the associated handle.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param protocol: one of the supported protocol
+ * @param datasize: one of the supported datasize @ref SAI_Protocol_DataSize
+ * @param nbslot: number of slot minimum value is 1 and the max is 16.
+ * @retval HAL status
+ */
+static HAL_StatusTypeDef SAI_InitPCM(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot)
+{
+ hsai->Init.Protocol = SAI_FREE_PROTOCOL;
+ hsai->Init.FirstBit = SAI_FIRSTBIT_MSB;
+ hsai->Init.ClockStrobing = SAI_CLOCKSTROBING_FALLINGEDGE;
+ hsai->FrameInit.FSDefinition = SAI_FS_STARTFRAME;
+ hsai->FrameInit.FSPolarity = SAI_FS_ACTIVE_HIGH;
+ hsai->FrameInit.FSOffset = SAI_FS_BEFOREFIRSTBIT;
+ hsai->SlotInit.FirstBitOffset = 0;
+ hsai->SlotInit.SlotNumber = nbslot;
+ hsai->SlotInit.SlotActive = SAI_SLOTACTIVE_ALL;
+
+ switch(protocol)
+ {
+ case SAI_PCM_SHORT :
+ hsai->FrameInit.ActiveFrameLength = 1;
+ break;
+ case SAI_PCM_LONG :
+ hsai->FrameInit.ActiveFrameLength = 13;
+ break;
+ default :
+ return HAL_ERROR;
+ }
+
+ switch(datasize)
+ {
+ case SAI_PROTOCOL_DATASIZE_16BIT:
+ hsai->Init.DataSize = SAI_DATASIZE_16;
+ hsai->FrameInit.FrameLength = 16 * nbslot;
+ hsai->SlotInit.SlotSize = SAI_SLOTSIZE_16B;
+ break;
+ case SAI_PROTOCOL_DATASIZE_16BITEXTENDED :
+ hsai->Init.DataSize = SAI_DATASIZE_16;
+ hsai->FrameInit.FrameLength = 32 * nbslot;
+ hsai->SlotInit.SlotSize = SAI_SLOTSIZE_32B;
+ break;
+
+ case SAI_PROTOCOL_DATASIZE_32BIT:
+ hsai->Init.DataSize = SAI_DATASIZE_32;
+ hsai->FrameInit.FrameLength = 32 * nbslot;
+ hsai->SlotInit.SlotSize = SAI_SLOTSIZE_32B;
+ break;
+ default :
+ return HAL_ERROR;
+ }
+
+ return HAL_OK;
+}
+
+/**
+ * @brief Fill the fifo.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static void SAI_FillFifo(SAI_HandleTypeDef *hsai)
+{
+ /* fill the fifo with data before to enabled the SAI */
+ while((hsai->Instance->SR & SAI_xSR_FLVL) != SAI_FIFOSTATUS_FULL)
+ {
+ if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
+ {
+ hsai->Instance->DR = (*hsai->pBuffPtr++);
+ }
+ else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
+ {
+ hsai->Instance->DR = *((uint32_t *)hsai->pBuffPtr);
+ hsai->pBuffPtr+= 2;
+ }
+ else
+ {
+ hsai->Instance->DR = *((uint32_t *)hsai->pBuffPtr);
+ hsai->pBuffPtr+= 4;
+ }
+ hsai->XferCount--;
+ }
+}
+
+/**
+ * @brief Return the interrupt flag to set according the SAI setup.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @param mode: SAI_MODE_DMA or SAI_MODE_IT
+ * @retval the list of the IT flag to enable
+ */
+static int32_t SAI_InterruptFlag(SAI_HandleTypeDef *hsai, uint32_t mode)
+{
+ int32_t tmpIT = SAI_IT_OVRUDR;
+
+ if(mode == SAI_MODE_IT)
+ {
+ tmpIT|= SAI_IT_FREQ;
+ }
+
+ if((hsai->Init.AudioMode == SAI_MODESLAVE_RX) || (hsai->Init.AudioMode == SAI_MODESLAVE_TX))
+ {
+ tmpIT|= SAI_IT_AFSDET | SAI_IT_LFSDET;
+ }
+ else
+ {
+ /* hsai has been configured in master mode */
+ tmpIT|= SAI_IT_WCKCFG;
+ }
+ return tmpIT;
+}
+
+/**
+ * @brief Disable the SAI and wait for the disabling.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static HAL_StatusTypeDef SAI_Disable(SAI_HandleTypeDef *hsai)
+{
+ uint32_t tickstart = HAL_GetTick();
+ HAL_StatusTypeDef errorcode = HAL_OK;
+
+ __HAL_SAI_DISABLE(hsai);
+ while((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != RESET)
+ {
+ /* Check for the Timeout */
+ if((HAL_GetTick() - tickstart) > SAI_DEFAULT_TIMEOUT)
+ {
+ errorcode = HAL_TIMEOUT;
+ goto error;
+ }
+ }
+error:
+ return errorcode;
+}
+
+/**
+ * @brief Tx Handler for Transmit in Interrupt mode 8-bit transfer.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static void SAI_Transmit_IT8Bit(SAI_HandleTypeDef *hsai)
+{
+ /* Write data on DR register */
+ hsai->Instance->DR = (*hsai->pBuffPtr++);
+ hsai->XferCount--;
+
+ /* Handle the end of the transmission */
+ if(hsai->XferCount == 0)
+ {
+ /* Disable FREQ and OVRUDR interrupts */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+ hsai->State = HAL_SAI_STATE_READY;
+ HAL_SAI_TxCpltCallback(hsai);
+ }
+}
+
+/**
+ * @brief Tx Handler for Transmit in Interrupt mode for 16-bit transfer.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static void SAI_Transmit_IT16Bit(SAI_HandleTypeDef *hsai)
+{
+ /* Write data on DR register */
+ hsai->Instance->DR = *(uint16_t *)hsai->pBuffPtr;
+ hsai->pBuffPtr+=2;
+ hsai->XferCount--;
+
+ /* Handle the end of the transmission */
+ if(hsai->XferCount == 0)
+ {
+ /* Disable FREQ and OVRUDR interrupts */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+ hsai->State = HAL_SAI_STATE_READY;
+ HAL_SAI_TxCpltCallback(hsai);
+ }
+}
+
+/**
+ * @brief Tx Handler for Transmit in Interrupt mode for 32-bit transfer.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static void SAI_Transmit_IT32Bit(SAI_HandleTypeDef *hsai)
+{
+ /* Write data on DR register */
+ hsai->Instance->DR = *(uint32_t *)hsai->pBuffPtr;
+ hsai->pBuffPtr+=4;
+ hsai->XferCount--;
+
+ /* Handle the end of the transmission */
+ if(hsai->XferCount == 0)
+ {
+ /* Disable FREQ and OVRUDR interrupts */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+ hsai->State = HAL_SAI_STATE_READY;
+ HAL_SAI_TxCpltCallback(hsai);
+ }
+}
+
+/**
+ * @brief Rx Handler for Receive in Interrupt mode 8-bit transfer.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static void SAI_Receive_IT8Bit(SAI_HandleTypeDef *hsai)
+{
+ /* Receive data */
+ (*hsai->pBuffPtr++) = hsai->Instance->DR;
+ hsai->XferCount--;
+
+ /* Check end of the transfer */
+ if(hsai->XferCount == 0)
+ {
+ /* Disable TXE and OVRUDR interrupts */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+
+ /* Clear the SAI Overrun flag */
+ __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
+
+ hsai->State = HAL_SAI_STATE_READY;
+ HAL_SAI_RxCpltCallback(hsai);
+ }
+}
+
+/**
+ * @brief Rx Handler for Receive in Interrupt mode for 16-bit transfer.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static void SAI_Receive_IT16Bit(SAI_HandleTypeDef *hsai)
+{
+ /* Receive data */
+ *(uint16_t*)hsai->pBuffPtr = hsai->Instance->DR;
+ hsai->pBuffPtr+=2;
+ hsai->XferCount--;
+
+ /* Check end of the transfer */
+ if(hsai->XferCount == 0)
+ {
+ /* Disable TXE and OVRUDR interrupts */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+
+ /* Clear the SAI Overrun flag */
+ __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
+
+ hsai->State = HAL_SAI_STATE_READY;
+ HAL_SAI_RxCpltCallback(hsai);
+ }
+}
+/**
+ * @brief Rx Handler for Receive in Interrupt mode for 32-bit transfer.
+ * @param hsai: pointer to a SAI_HandleTypeDef structure that contains
+ * the configuration information for SAI module.
+ * @retval None
+ */
+static void SAI_Receive_IT32Bit(SAI_HandleTypeDef *hsai)
+{
+ /* Receive data */
+ *(uint32_t*)hsai->pBuffPtr = hsai->Instance->DR;
+ hsai->pBuffPtr+=4;
+ hsai->XferCount--;
+
+ /* Check end of the transfer */
+ if(hsai->XferCount == 0)
+ {
+ /* Disable TXE and OVRUDR interrupts */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
+
+ /* Clear the SAI Overrun flag */
+ __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
+
+ hsai->State = HAL_SAI_STATE_READY;
+ HAL_SAI_RxCpltCallback(hsai);
+ }
+}
+/**
+ * @brief DMA SAI transmit process complete callback.
+ * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
+ * the configuration information for the specified DMA module.
+ * @retval None
+ */
+static void SAI_DMATxCplt(DMA_HandleTypeDef *hdma)
+{
+ SAI_HandleTypeDef* hsai = (SAI_HandleTypeDef*)((DMA_HandleTypeDef* )hdma)->Parent;
+
+ if((hdma->Instance->CCR & DMA_CCR_CIRC) == 0)
+ {
+ hsai->XferCount = 0;
+
+ /* Disable SAI Tx DMA Request */
+ hsai->Instance->CR1 &= (uint32_t)(~SAI_xCR1_DMAEN);
+
+ /* Stop the interrupts error handling */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
+
+ hsai->State= HAL_SAI_STATE_READY;
+ }
+ HAL_SAI_TxCpltCallback(hsai);
+}
+
+/**
+ * @brief DMA SAI transmit process half complete callback.
+ * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
+ * the configuration information for the specified DMA module.
+ * @retval None
+ */
+static void SAI_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+ SAI_HandleTypeDef* hsai = (SAI_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
+
+ HAL_SAI_TxHalfCpltCallback(hsai);
+}
+
+/**
+ * @brief DMA SAI receive process complete callback.
+ * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
+ * the configuration information for the specified DMA module.
+ * @retval None
+ */
+static void SAI_DMARxCplt(DMA_HandleTypeDef *hdma)
+{
+ SAI_HandleTypeDef* hsai = ( SAI_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
+ if((hdma->Instance->CCR & DMA_CCR_CIRC) == 0)
+ {
+ /* Disable Rx DMA Request */
+ hsai->Instance->CR1 &= (uint32_t)(~SAI_xCR1_DMAEN);
+ hsai->XferCount = 0;
+
+ /* Stop the interrupts error handling */
+ __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
+
+ hsai->State = HAL_SAI_STATE_READY;
+ }
+ HAL_SAI_RxCpltCallback(hsai);
+}
+
+/**
+ * @brief DMA SAI receive process half complete callback.
+ * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
+ * the configuration information for the specified DMA module.
+ * @retval None
+ */
+static void SAI_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
+{
+ SAI_HandleTypeDef* hsai = (SAI_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
+
+ HAL_SAI_RxHalfCpltCallback(hsai);
+}
+/**
+ * @brief DMA SAI communication error callback.
+ * @param hdma: pointer to a DMA_HandleTypeDef structure that contains
+ * the configuration information for the specified DMA module.
+ * @retval None
+ */
+static void SAI_DMAError(DMA_HandleTypeDef *hdma)
+{
+ SAI_HandleTypeDef* hsai = ( SAI_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
+
+ /* Stop the DMA transfer */
+ HAL_SAI_DMAStop(hsai);
+
+ /* Set the SAI state ready to be able to start again the process */
+ hsai->State= HAL_SAI_STATE_READY;
+ HAL_SAI_ErrorCallback(hsai);
+ hsai->XferCount = 0;
+}
+
+/**
+ * @}
+ */
+
+#endif /* HAL_SAI_MODULE_ENABLED */
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+