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stm32f7xx_hal_sai.c
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/**
******************************************************************************
* @file stm32f7xx_hal_sai.c
* @author MCD Application Team
* @version V1.1.2
* @date 23-September-2016
* @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 stream.
(+++) Enable the DMAx interface clock.
(+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.
(+++) Configure the DMA Tx/Rx Stream.
(+++) 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 Stream.
(#) 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:
(+@) I2S PLL is configured or
(+@) SAI PLL is configured or
(+@) External clock source is configured after setting correctly
the define constant EXTERNAL_CLOCK_VALUE in the stm32f7xx_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) 2016 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 "stm32f7xx_hal.h"
/** @addtogroup STM32F7xx_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 /* 4ms */
#define SAI_xCR2_MUTECNT_OFFSET POSITION_VAL(SAI_xCR2_MUTECNT)
/**
* @}
*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup SAI_Private_Functions SAI Private Functions
* @{
*/
static void SAI_FillFifo(SAI_HandleTypeDef *hsai);
static uint32_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);
static void SAI_DMAAbort(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 status = HAL_OK;
/* Check the parameters */
assert_param(IS_SAI_SUPPORTED_PROTOCOL(protocol));
assert_param(IS_SAI_PROTOCOL_DATASIZE(datasize));
switch(protocol)
{
case SAI_I2S_STANDARD :
case SAI_I2S_MSBJUSTIFIED :
case SAI_I2S_LSBJUSTIFIED :
status = SAI_InitI2S(hsai, protocol, datasize, nbslot);
break;
case SAI_PCM_LONG :
case SAI_PCM_SHORT :
status = SAI_InitPCM(hsai, protocol, datasize, nbslot);
break;
default :
status = HAL_ERROR;
break;
}
if(status == HAL_OK)
{
status = HAL_SAI_Init(hsai);
}
return status;
}
/**
* @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;
uint32_t ckstr_bits = 0;
uint32_t syncen_bits = 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_MONO_STEREO_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_OUTBLOCKA_ENABLE :
tmpregisterGCR = SAI_GCR_SYNCOUT_0;
break;
case SAI_SYNCEXT_OUTBLOCKB_ENABLE :
tmpregisterGCR = SAI_GCR_SYNCOUT_1;
break;
default:
break;
}
switch(hsai->Init.Synchro)
{
case SAI_ASYNCHRONOUS :
{
syncen_bits = 0;
}
break;
case SAI_SYNCHRONOUS :
{
syncen_bits = SAI_xCR1_SYNCEN_0;
}
break;
case SAI_SYNCHRONOUS_EXT_SAI1 :
{
syncen_bits = SAI_xCR1_SYNCEN_1;
}
break;
case SAI_SYNCHRONOUS_EXT_SAI2 :
{
syncen_bits = SAI_xCR1_SYNCEN_1;
tmpregisterGCR |= SAI_GCR_SYNCIN_0;
}
break;
default:
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;
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;
}
}
/* Compute CKSTR bits of SAI CR1 according ClockStrobing and AudioMode */
if((hsai->Init.AudioMode == SAI_MODEMASTER_TX) || (hsai->Init.AudioMode == SAI_MODESLAVE_TX))
{ /* Transmit */
ckstr_bits = (hsai->Init.ClockStrobing == SAI_CLOCKSTROBING_RISINGEDGE) ? 0 : SAI_xCR1_CKSTR;
}
else
{ /* Receive */
ckstr_bits = (hsai->Init.ClockStrobing == SAI_CLOCKSTROBING_RISINGEDGE) ? SAI_xCR1_CKSTR : 0;
}
/* 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 | \
ckstr_bits | syncen_bits | \
hsai->Init.MonoStereoMode | hsai->Init.OutputDrive | \
hsai->Init.NoDivider | (hsai->Init.Mckdiv << 20));
/* SAI CR2 Configuration */
hsai->Instance->CR2&= ~(SAI_xCR2_FTH | SAI_xCR2_FFLUSH | SAI_xCR2_COMP | SAI_xCR2_CPL);
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_FSPOL | 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 << 16) | ((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 = 0xFFFFFFFFU;
/* 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;
/* Release Lock */
__HAL_UNLOCK(hsai);
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)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(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)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(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();
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
if(hsai->State == HAL_SAI_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hsai);
hsai->XferSize = Size;
hsai->XferCount = Size;
hsai->pBuffPtr = pData;
hsai->State = HAL_SAI_STATE_BUSY_TX;
hsai->ErrorCode = HAL_SAI_ERROR_NONE;
/* 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);
}
while(hsai->XferCount > 0)
{
/* 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)
{
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)))
{
/* Update error code */
hsai->ErrorCode |= HAL_SAI_ERROR_TIMEOUT;
/* Clear all the flags */
hsai->Instance->CLRFR = 0xFFFFFFFFU;
/* Disable SAI peripheral */
SAI_Disable(hsai);
/* Flush the fifo */
SET_BIT(hsai->Instance->CR2, SAI_xCR2_FFLUSH);
/* Change the SAI state */
hsai->State = HAL_SAI_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hsai);
return HAL_ERROR;
}
}
}
hsai->State = HAL_SAI_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hsai);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @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();
if((pData == NULL ) || (Size == 0))
{
return HAL_ERROR;
}
if(hsai->State == HAL_SAI_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hsai);
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 */
while(hsai->XferCount > 0)
{
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)))
{
/* Update error code */
hsai->ErrorCode |= HAL_SAI_ERROR_TIMEOUT;
/* Clear all the flags */
hsai->Instance->CLRFR = 0xFFFFFFFFU;
/* Disable SAI peripheral */
SAI_Disable(hsai);
/* Flush the fifo */
SET_BIT(hsai->Instance->CR2, SAI_xCR2_FFLUSH);
/* Change the SAI state */
hsai->State = HAL_SAI_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hsai);
return HAL_ERROR;
}
}
}
hsai->State = HAL_SAI_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hsai);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @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)
{
if((pData == NULL) || (Size == 0))
{
return HAL_ERROR;
}
if(hsai->State == HAL_SAI_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hsai);
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;
}
/* Fill the fifo before starting the communication */
SAI_FillFifo(hsai);
/* 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)
{
/* Enable SAI peripheral */
__HAL_SAI_ENABLE(hsai);
}
/* Process Unlocked */
__HAL_UNLOCK(hsai);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @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)
{
if((pData == NULL) || (Size == 0))
{
return HAL_ERROR;
}
if(hsai->State == HAL_SAI_STATE_READY)
{
/* Process Locked */
__HAL_LOCK(hsai);
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 TXE 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)
{
/* Enable SAI peripheral */
__HAL_SAI_ENABLE(hsai);
}
/* Process Unlocked */
__HAL_UNLOCK(hsai);
return HAL_OK;
}
else
{
return HAL_BUSY;
}
}
/**
* @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);
}