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/**
******************************************************************************
* @file stm32f4xx_hal_sai_ex.c
* @author MCD Application Team
* @version V1.3.2
* @date 26-June-2015
* @brief SAI Extension HAL module driver.
* This file provides firmware functions to manage the following
* functionalities of SAI extension peripheral:
* + Extension features functions
*
@verbatim
==============================================================================
##### SAI peripheral extension features #####
==============================================================================
[..] Comparing to other previous devices, the SAI interface for STM32F446xx
devices contains the following additional features :
(+) Possibility to be clocked from PLLR
##### How to use this driver #####
==============================================================================
[..] This driver provides functions to manage several sources to clock SAI
@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 "stm32f4xx_hal.h"
/** @addtogroup STM32F4xx_HAL_Driver
* @{
*/
/** @defgroup SAIEx SAIEx
* @brief SAI Extension HAL module driver
* @{
*/
#ifdef HAL_SAI_MODULE_ENABLED
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) || defined(STM32F446xx)
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* SAI registers Masks */
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup SAI_Private_Functions SAI Private Functions
* @{
*/
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup SAIEx_Exported_Functions SAI Extended Exported Functions
* @{
*/
/** @defgroup SAIEx_Exported_Functions_Group1 Extension features functions
* @brief Extension features functions
*
@verbatim
===============================================================================
##### Extension features Functions #####
===============================================================================
[..]
This subsection provides a set of functions allowing to manage the possible
SAI clock sources.
@endverbatim
* @{
*/
/**
* @brief Configure SAI Block synchronization mode
* @param hsai: pointer to a SAI_HandleTypeDef structure that contains
* the configuration information for SAI module.
* @retval SAI Clock Input
*/
void SAI_BlockSynchroConfig(SAI_HandleTypeDef *hsai)
{
uint32_t tmpregisterGCR = 0;
#if defined(STM32F446xx)
/* 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;
}
#endif /* STM32F446xx */
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
/* 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;
}
SAI1->GCR = tmpregisterGCR;
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
}
/**
* @brief Get SAI Input Clock based on SAI source clock selection
* @param hsai: pointer to a SAI_HandleTypeDef structure that contains
* the configuration information for SAI module.
* @retval SAI Clock Input
*/
uint32_t SAI_GetInputClock(SAI_HandleTypeDef *hsai)
{
/* This variable used to store the SAI_CK_x (value in Hz) */
uint32_t saiclocksource = 0;
#if defined(STM32F446xx)
if ((hsai->Instance == SAI1_Block_A) || (hsai->Instance == SAI1_Block_B))
{
saiclocksource = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_SAI1);
}
else /* SAI2_Block_A || SAI2_Block_B*/
{
saiclocksource = HAL_RCCEx_GetPeriphCLKFreq(RCC_PERIPHCLK_SAI2);
}
#endif /* STM32F446xx */
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
uint32_t vcoinput = 0, tmpreg = 0;
/* Check the SAI Block parameters */
assert_param(IS_SAI_CLK_SOURCE(hsai->Init.ClockSource));
/* SAI Block clock source selection */
if(hsai->Instance == SAI1_Block_A)
{
__HAL_RCC_SAI_BLOCKACLKSOURCE_CONFIG(hsai->Init.ClockSource);
}
else
{
__HAL_RCC_SAI_BLOCKBCLKSOURCE_CONFIG((uint32_t)(hsai->Init.ClockSource << 2));
}
/* VCO Input Clock value calculation */
if((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLSOURCE_HSI)
{
/* In Case the PLL Source is HSI (Internal Clock) */
vcoinput = (HSI_VALUE / (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM));
}
else
{
/* In Case the PLL Source is HSE (External Clock) */
vcoinput = ((HSE_VALUE / (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM)));
}
/* SAI_CLK_x : SAI Block Clock configuration for different clock sources selected */
if(hsai->Init.ClockSource == SAI_CLKSOURCE_PLLSAI)
{
/* Configure the PLLI2S division factor */
/* PLLSAI_VCO Input = PLL_SOURCE/PLLM */
/* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN */
/* SAI_CLK(first level) = PLLSAI_VCO Output/PLLSAIQ */
tmpreg = (RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIQ) >> 24;
saiclocksource = (vcoinput * ((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIN) >> 6))/(tmpreg);
/* SAI_CLK_x = SAI_CLK(first level)/PLLSAIDIVQ */
tmpreg = (((RCC->DCKCFGR & RCC_DCKCFGR_PLLSAIDIVQ) >> 8) + 1);
saiclocksource = saiclocksource/(tmpreg);
}
else if(hsai->Init.ClockSource == SAI_CLKSOURCE_PLLI2S)
{
/* Configure the PLLI2S division factor */
/* PLLI2S_VCO Input = PLL_SOURCE/PLLM */
/* PLLI2S_VCO Output = PLLI2S_VCO Input * PLLI2SN */
/* SAI_CLK(first level) = PLLI2S_VCO Output/PLLI2SQ */
tmpreg = (RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SQ) >> 24;
saiclocksource = (vcoinput * ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> 6))/(tmpreg);
/* SAI_CLK_x = SAI_CLK(first level)/PLLI2SDIVQ */
tmpreg = ((RCC->DCKCFGR & RCC_DCKCFGR_PLLI2SDIVQ) + 1);
saiclocksource = saiclocksource/(tmpreg);
}
else /* sConfig->ClockSource == SAI_CLKSource_Ext */
{
/* Enable the External Clock selection */
__HAL_RCC_I2S_CONFIG(RCC_I2SCLKSOURCE_EXT);
saiclocksource = EXTERNAL_CLOCK_VALUE;
}
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */
/* the return result is the value of SAI clock */
return saiclocksource;
}
/**
* @}
*/
/**
* @}
*/
#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx */
#endif /* HAL_SAI_MODULE_ENABLED */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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