File content as of revision 581:39197bcd20f2:

/**
  ******************************************************************************
  * @file    stm32f4xx_hal_rcc_ex.c
  * @author  MCD Application Team
  * @version V1.3.0
  * @date    09-March-2015
  * @brief   Extension RCC HAL module driver.
  *          This file provides firmware functions to manage the following 
  *          functionalities RCC extension peripheral:
  *           + Extended Peripheral Control functions
  *  
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; 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 RCCEx RCCEx
  * @brief RCCEx HAL module driver
  * @{
  */

#ifdef HAL_RCC_MODULE_ENABLED

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/** @addtogroup RCCEx_Private_Constants
  * @{
  */
/**
  * @}
  */ 
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/** @defgroup RCCEx_Exported_Functions RCCEx Exported Functions
  *  @{
  */

/** @defgroup RCCEx_Exported_Functions_Group1 Extended Peripheral Control functions 
 *  @brief  Extended Peripheral Control functions  
 *
@verbatim   
 ===============================================================================
                ##### Extended Peripheral Control functions  #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to control the RCC Clocks 
    frequencies.
    [..] 
    (@) Important note: Care must be taken when HAL_RCCEx_PeriphCLKConfig() is used to
        select the RTC clock source; in this case the Backup domain will be reset in  
        order to modify the RTC Clock source, as consequence RTC registers (including 
        the backup registers) and RCC_BDCR register are set to their reset values.
      
@endverbatim
  * @{
  */
#if defined(STM32F446xx) 
/**
  * @brief  Initializes the RCC extended peripherals clocks according to the specified
  *         parameters in the RCC_PeriphCLKInitTypeDef.
  * @param  PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef structure that
  *         contains the configuration information for the Extended Peripherals
  *         clocks(I2S, SAI, LTDC RTC and TIM).
  *         
  * @note   Care must be taken when HAL_RCCEx_PeriphCLKConfig() is used to select 
  *         the RTC clock source; in this case the Backup domain will be reset in  
  *         order to modify the RTC Clock source, as consequence RTC registers (including 
  *         the backup registers) and RCC_BDCR register are set to their reset values.
  *
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_RCCEx_PeriphCLKConfig(RCC_PeriphCLKInitTypeDef  *PeriphClkInit)
{
  uint32_t tickstart = 0;
  uint32_t tmpreg1 = 0;
  uint32_t plli2sp = 0;
  uint32_t plli2sq = 0;
  uint32_t plli2sr = 0;
  uint32_t pllsaip = 0;
  uint32_t pllsaiq = 0;
  uint32_t plli2sused = 0;
  uint32_t pllsaiused = 0;
    
  /* Check the peripheral clock selection parameters */
  assert_param(IS_RCC_PERIPHCLOCK(PeriphClkInit->PeriphClockSelection));
    
  /*----------------------------------- I2S APB1 configuration ----------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2S_APB1) == (RCC_PERIPHCLK_I2S_APB1))
  {
    /* Check the parameters */
    assert_param(IS_RCC_I2SAPB1CLKSOURCE(PeriphClkInit->I2sApb1ClockSelection));
    
    /* Configure I2S Clock source */
    __HAL_RCC_I2S_APB1_CONFIG(PeriphClkInit->I2sApb1ClockSelection);
    /* Enable the PLLI2S when it's used as clock source for I2S */
    if(PeriphClkInit->I2sApb1ClockSelection == RCC_I2SAPB1CLKSOURCE_PLLI2S)
    {
      plli2sused = 1; 
    }
  }
  
  /*----------------------------------- I2S APB2 configuration -----------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2S_APB2) == (RCC_PERIPHCLK_I2S_APB2))
  {
    /* Check the parameters */
    assert_param(IS_RCC_I2SAPB2CLKSOURCE(PeriphClkInit->I2sApb2ClockSelection));
    
    /* Configure I2S Clock source */
    __HAL_RCC_I2S_APB2_CONFIG(PeriphClkInit->I2sApb2ClockSelection);
    /* Enable the PLLI2S when it's used as clock source for I2S */
    if(PeriphClkInit->I2sApb2ClockSelection == RCC_I2SAPB2CLKSOURCE_PLLI2S)
    {
      plli2sused = 1; 
    }
  }

  /*------------------------------------ SAI1 configuration --------------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI1) == (RCC_PERIPHCLK_SAI1))
  {
    /* Check the parameters */
    assert_param(IS_RCC_SAI1CLKSOURCE(PeriphClkInit->Sai1ClockSelection));
    
    /* Configure SAI1 Clock source */
    __HAL_RCC_SAI1_CONFIG(PeriphClkInit->Sai1ClockSelection);
    /* Enable the PLLI2S when it's used as clock source for SAI */
    if(PeriphClkInit->Sai1ClockSelection == RCC_SAI1CLKSOURCE_PLLI2S)
    {
      plli2sused = 1; 
    }
    /* Enable the PLLSAI when it's used as clock source for SAI */
    if(PeriphClkInit->Sai1ClockSelection == RCC_SAI1CLKSOURCE_PLLSAI)
    {
      pllsaiused = 1; 
    }
  }
  
  /*------------------------------------ SAI2 configuration --------------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI2) == (RCC_PERIPHCLK_SAI2))
  {
    /* Check the parameters */
    assert_param(IS_RCC_SAI2CLKSOURCE(PeriphClkInit->Sai2ClockSelection));
    
    /* Configure SAI2 Clock source */
    __HAL_RCC_SAI2_CONFIG(PeriphClkInit->Sai2ClockSelection);
    
    /* Enable the PLLI2S when it's used as clock source for SAI */
    if(PeriphClkInit->Sai2ClockSelection == RCC_SAI2CLKSOURCE_PLLI2S)
    {
      plli2sused = 1; 
    }
    /* Enable the PLLSAI when it's used as clock source for SAI */
    if(PeriphClkInit->Sai2ClockSelection == RCC_SAI2CLKSOURCE_PLLSAI)
    {
      pllsaiused = 1; 
    }
  }
   
  /*------------------------------------ RTC configuration --------------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_RTC) == (RCC_PERIPHCLK_RTC))
  {
    /* Enable Power Clock*/
    __HAL_RCC_PWR_CLK_ENABLE();
    
    /* Enable write access to Backup domain */
    PWR->CR |= PWR_CR_DBP;
    
    /* Get tick */
    tickstart = HAL_GetTick();
    
    while((PWR->CR & PWR_CR_DBP) == RESET)
    {
      if((HAL_GetTick() - tickstart ) > RCC_DBP_TIMEOUT_VALUE)
      {
        return HAL_TIMEOUT;
      }      
    }
    
    /* Reset the Backup domain only if the RTC Clock source selction is modified */ 
    if((RCC->BDCR & RCC_BDCR_RTCSEL) != (PeriphClkInit->RTCClockSelection & RCC_BDCR_RTCSEL))
    {
      /* Store the content of BDCR register before the reset of Backup Domain */
      tmpreg1 = (RCC->BDCR & ~(RCC_BDCR_RTCSEL));
      /* RTC Clock selection can be changed only if the Backup Domain is reset */
      __HAL_RCC_BACKUPRESET_FORCE();
      __HAL_RCC_BACKUPRESET_RELEASE();
      /* Restore the Content of BDCR register */
      RCC->BDCR = tmpreg1;
    }
    
    /* If LSE is selected as RTC clock source, wait for LSE reactivation */
    if(PeriphClkInit->RTCClockSelection == RCC_RTCCLKSOURCE_LSE)
    {
      /* Get tick */
      tickstart = HAL_GetTick();
      
      /* Wait till LSE is ready */  
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET)
      {
        if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        }      
      }  
    }
    __HAL_RCC_RTC_CONFIG(PeriphClkInit->RTCClockSelection); 
  }
  
  /*------------------------------------ TIM configuration --------------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_TIM) == (RCC_PERIPHCLK_TIM))
  {
    /* Configure Timer Prescaler */
    __HAL_RCC_TIMCLKPRESCALER(PeriphClkInit->TIMPresSelection);
  }

  /*------------------------------------- FMPI2C1 Configuration ----------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_FMPI2C1) == RCC_PERIPHCLK_FMPI2C1)
  {
    /* Check the parameters */
    assert_param(IS_RCC_FMPI2C1CLKSOURCE(PeriphClkInit->Fmpi2c1ClockSelection));
    
    /* Configure the FMPI2C1 clock source */
    __HAL_RCC_FMPI2C1_CONFIG(PeriphClkInit->Fmpi2c1ClockSelection);
  }
   
  /*--------------------------------------- CEC Configuration -----------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_CEC) == RCC_PERIPHCLK_CEC)
  {
    /* Check the parameters */
    assert_param(IS_RCC_CECCLKSOURCE(PeriphClkInit->CecClockSelection));
    
    /* Configure the CEC clock source */
    __HAL_RCC_CEC_CONFIG(PeriphClkInit->CecClockSelection);
  }
  
  /*-------------------------------------- CK48 Configuration -----------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_CK48) == RCC_PERIPHCLK_CK48)
  {
    /* Check the parameters */
    assert_param(IS_RCC_CK48CLKSOURCE(PeriphClkInit->Clk48ClockSelection));
    
    /* Configure the SDIO clock source */
    __HAL_RCC_CLK48_CONFIG(PeriphClkInit->Clk48ClockSelection);

    /* Enable the PLLSAI when it's used as clock source for CK48 */
    if(PeriphClkInit->Clk48ClockSelection == RCC_CK48CLKSOURCE_PLLSAIP)
    {
      pllsaiused = 1; 
    }
  }

  /*------------------------------------- SDIO Configuration ------------------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SDIO) == RCC_PERIPHCLK_SDIO)
  {
    /* Check the parameters */
    assert_param(IS_RCC_SDIOCLKSOURCE(PeriphClkInit->SdioClockSelection));
    
    /* Configure the SDIO clock source */
    __HAL_RCC_SDIO_CONFIG(PeriphClkInit->SdioClockSelection);
  }

  /*------------------------------------- SPDIFRX Configuration --------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SPDIFRX) == RCC_PERIPHCLK_SPDIFRX)
  {
    /* Check the parameters */
    assert_param(IS_RCC_SPDIFRXCLKSOURCE(PeriphClkInit->SpdifClockSelection));
    
    /* Configure the SPDIFRX clock source */
    __HAL_RCC_SPDIFRX_CONFIG(PeriphClkInit->SpdifClockSelection);
    /* Enable the PLLI2S when it's used as clock source for SPDIFRX */
    if(PeriphClkInit->SpdifClockSelection == RCC_SPDIFRXCLKSOURCE_PLLI2SP)
    {
      plli2sused = 1; 
    }
  }
  
  /*-------------------------------------- PLLI2S Configuration --------------*/
  /* PLLI2S is configured when a peripheral will use it as source clock : SAI1, SAI2, I2S on APB1,
     I2S on APB2 or SPDIFRX */
  if((plli2sused == 1) || (PeriphClkInit->PeriphClockSelection == RCC_PERIPHCLK_PLLI2S))
  {
    /* Disable the PLLI2S */
    __HAL_RCC_PLLI2S_DISABLE();    
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLI2S is disabled */
    while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLI2SRDY)  != RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLI2S_TIMEOUT_VALUE)
      {
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      } 
    }
    
    /* check for common PLLI2S Parameters */
    assert_param(IS_RCC_PLLI2SM_VALUE(PeriphClkInit->PLLI2S.PLLI2SM));
    assert_param(IS_RCC_PLLI2SN_VALUE(PeriphClkInit->PLLI2S.PLLI2SN));
      
    /*----------------- In Case of PLLI2S is selected as source clock for I2S -------------------*/ 
    if(((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2S_APB1) == RCC_PERIPHCLK_I2S_APB1) && (PeriphClkInit->I2sApb1ClockSelection == RCC_I2SAPB1CLKSOURCE_PLLI2S)) ||
       ((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2S_APB2) == RCC_PERIPHCLK_I2S_APB2) && (PeriphClkInit->I2sApb2ClockSelection == RCC_I2SAPB2CLKSOURCE_PLLI2S)))
    {
      /* check for Parameters */
      assert_param(IS_RCC_PLLI2SR_VALUE(PeriphClkInit->PLLI2S.PLLI2SR));
    
      /* Read PLLI2SP/PLLI2SQ value from PLLI2SCFGR register (this value is not needed for I2S configuration) */
      plli2sp = ((((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SP) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SP)) + 1) << 1);
      plli2sq = ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SQ) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SQ));
      /* Configure the PLLI2S division factors */
      /* PLLI2S_VCO = f(VCO clock) = f(PLLI2S clock input) × (PLLI2SN/PLLI2SM) */
      /* I2SCLK = f(PLLI2S clock output) = f(VCO clock) / PLLI2SR */
      __HAL_RCC_PLLI2S_CONFIG(PeriphClkInit->PLLI2S.PLLI2SM, PeriphClkInit->PLLI2S.PLLI2SN , plli2sp, plli2sq, PeriphClkInit->PLLI2S.PLLI2SR);
    }
        
    /*----------------- In Case of PLLI2S is selected as source clock for SAI -------------------*/  
    if(((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI1) == RCC_PERIPHCLK_SAI1) && (PeriphClkInit->Sai1ClockSelection == RCC_SAI1CLKSOURCE_PLLI2S)) ||
       ((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI2) == RCC_PERIPHCLK_SAI2) && (PeriphClkInit->Sai2ClockSelection == RCC_SAI2CLKSOURCE_PLLI2S))) 
    {
      /* Check for PLLI2S Parameters */
      assert_param(IS_RCC_PLLI2SQ_VALUE(PeriphClkInit->PLLI2S.PLLI2SQ));
      /* Check for PLLI2S/DIVQ parameters */
      assert_param(IS_RCC_PLLI2S_DIVQ_VALUE(PeriphClkInit->PLLI2SDivQ));
            
      /* Read PLLI2SP/PLLI2SR value from PLLI2SCFGR register (this value is not needed for SAI configuration) */
      plli2sp = ((((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SP) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SP)) + 1) << 1);
      plli2sr = ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SR));
      /* Configure the PLLI2S division factors */      
      /* PLLI2S_VCO Input  = PLL_SOURCE/PLLI2SM */
      /* PLLI2S_VCO Output = PLLI2S_VCO Input * PLLI2SN */
      /* SAI_CLK(first level) = PLLI2S_VCO Output/PLLI2SQ */
      __HAL_RCC_PLLI2S_CONFIG(PeriphClkInit->PLLI2S.PLLI2SM, PeriphClkInit->PLLI2S.PLLI2SN , plli2sp, PeriphClkInit->PLLI2S.PLLI2SQ, plli2sr);
   
      /* SAI_CLK_x = SAI_CLK(first level)/PLLI2SDIVQ */ 
      __HAL_RCC_PLLI2S_PLLSAICLKDIVQ_CONFIG(PeriphClkInit->PLLI2SDivQ);   
    }          

    /*----------------- In Case of PLLI2S is selected as source clock for SPDIFRX -------------------*/  
    if((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SPDIFRX) == RCC_PERIPHCLK_SPDIFRX) && (PeriphClkInit->SpdifClockSelection == RCC_SPDIFRXCLKSOURCE_PLLI2SP))
    {
      /* check for Parameters */
      assert_param(IS_RCC_PLLI2SP_VALUE(PeriphClkInit->PLLI2S.PLLI2SP));
      /* Read PLLI2SR value from PLLI2SCFGR register (this value is not need for SAI configuration) */
      plli2sq = ((((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SP) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SP)) + 1) << 1);
      plli2sr = ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SR));
      /* Configure the PLLI2S division factors */
      /* PLLI2S_VCO = f(VCO clock) = f(PLLI2S clock input) × (PLLI2SN/PLLI2SM) */
      /* SPDIFRXCLK = f(PLLI2S clock output) = f(VCO clock) / PLLI2SP */
      __HAL_RCC_PLLI2S_CONFIG(PeriphClkInit->PLLI2S.PLLI2SM, PeriphClkInit->PLLI2S.PLLI2SN , PeriphClkInit->PLLI2S.PLLI2SP, plli2sq, plli2sr);
    } 
    
     /*----------------- In Case of PLLI2S is just selected  -----------------*/  
    if((PeriphClkInit->PeriphClockSelection & RCC_PERIPHCLK_PLLI2S) == RCC_PERIPHCLK_PLLI2S)
    {
      /* Check for Parameters */
      assert_param(IS_RCC_PLLI2SP_VALUE(PeriphClkInit->PLLI2S.PLLI2SP));
      assert_param(IS_RCC_PLLI2SR_VALUE(PeriphClkInit->PLLI2S.PLLI2SR));
      assert_param(IS_RCC_PLLI2SR_VALUE(PeriphClkInit->PLLI2S.PLLI2SQ));

      /* Configure the PLLI2S division factors */
      /* PLLI2S_VCO = f(VCO clock) = f(PLLI2S clock input) × (PLLI2SN/PLLI2SM) */
      /* SPDIFRXCLK = f(PLLI2S clock output) = f(VCO clock) / PLLI2SP */
      __HAL_RCC_PLLI2S_CONFIG(PeriphClkInit->PLLI2S.PLLI2SM, PeriphClkInit->PLLI2S.PLLI2SN , PeriphClkInit->PLLI2S.PLLI2SP, PeriphClkInit->PLLI2S.PLLI2SQ, PeriphClkInit->PLLI2S.PLLI2SR);
    }    
   
    /* Enable the PLLI2S */
    __HAL_RCC_PLLI2S_ENABLE();
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLI2S is ready */
    while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLI2SRDY)  == RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLI2S_TIMEOUT_VALUE)
      {
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }
  } 
  /*-------------------------------------- PLLSAI Configuration ---------------------------------*/
  /* PLLSAI is configured when a peripheral will use it as source clock : SAI1, SAI2, CK48 or SDIO */
  if(pllsaiused == 1)
  {
    /* Disable PLLSAI Clock */
    __HAL_RCC_PLLSAI_DISABLE(); 
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLSAI is disabled */
    while(__HAL_RCC_PLLSAI_GET_FLAG() != RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLSAI_TIMEOUT_VALUE)
      { 
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }
    
    /* Check the PLLSAI division factors */
    assert_param(IS_RCC_PLLSAIM_VALUE(PeriphClkInit->PLLSAI.PLLSAIM));
    assert_param(IS_RCC_PLLSAIN_VALUE(PeriphClkInit->PLLSAI.PLLSAIN));
    
    /*----------------- In Case of PLLSAI is selected as source clock for SAI -------------------*/  
    if(((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI1) == RCC_PERIPHCLK_SAI1) && (PeriphClkInit->Sai1ClockSelection == RCC_SAI1CLKSOURCE_PLLSAI)) ||
       ((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI2) == RCC_PERIPHCLK_SAI2) && (PeriphClkInit->Sai2ClockSelection == RCC_SAI2CLKSOURCE_PLLSAI)))
    {
      /* check for PLLSAIQ Parameter */
      assert_param(IS_RCC_PLLSAIQ_VALUE(PeriphClkInit->PLLSAI.PLLSAIQ));
      /* check for PLLSAI/DIVQ Parameter */
      assert_param(IS_RCC_PLLSAI_DIVQ_VALUE(PeriphClkInit->PLLSAIDivQ));
    
      /* Read PLLSAIP value from PLLSAICFGR register (this value is not needed for SAI configuration) */
      pllsaip = ((((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIP) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIP)) + 1) << 1);
      /* PLLSAI_VCO Input  = PLL_SOURCE/PLLM */
      /* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN */
      /* SAI_CLK(first level) = PLLSAI_VCO Output/PLLSAIQ */
      __HAL_RCC_PLLSAI_CONFIG(PeriphClkInit->PLLSAI.PLLSAIM, PeriphClkInit->PLLSAI.PLLSAIN , pllsaip, PeriphClkInit->PLLSAI.PLLSAIQ, 0);
      
      /* SAI_CLK_x = SAI_CLK(first level)/PLLSAIDIVQ */ 
      __HAL_RCC_PLLSAI_PLLSAICLKDIVQ_CONFIG(PeriphClkInit->PLLSAIDivQ);
    }           

    /*----------------- In Case of PLLSAI is selected as source clock for CK48 -------------------*/   
    /* In Case of PLLI2S is selected as source clock for CK48 */ 
    if((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_CK48) == RCC_PERIPHCLK_CK48) && (PeriphClkInit->Clk48ClockSelection == RCC_CK48CLKSOURCE_PLLSAIP))
    {
      /* check for Parameters */
      assert_param(IS_RCC_PLLSAIP_VALUE(PeriphClkInit->PLLSAI.PLLSAIP));
      /* Read PLLSAIQ value from PLLI2SCFGR register (this value is not need for SAI configuration) */
      pllsaiq = ((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIQ) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIQ));
      /* Configure the PLLSAI division factors */
      /* PLLSAI_VCO = f(VCO clock) = f(PLLSAI clock input) × (PLLI2SN/PLLSAIM) */
      /* 48CLK = f(PLLSAI clock output) = f(VCO clock) / PLLSAIP */
      __HAL_RCC_PLLSAI_CONFIG(PeriphClkInit->PLLSAI.PLLSAIM, PeriphClkInit->PLLSAI.PLLSAIN , PeriphClkInit->PLLSAI.PLLSAIP, pllsaiq, 0);
    }        

    /* Enable PLLSAI Clock */
    __HAL_RCC_PLLSAI_ENABLE();
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLSAI is ready */
    while(__HAL_RCC_PLLSAI_GET_FLAG() == RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLSAI_TIMEOUT_VALUE)
      { 
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }  
  }
  return HAL_OK;
}

/**
  * @brief  Get the RCC_PeriphCLKInitTypeDef according to the internal
  *         RCC configuration registers.
  * @param  PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef structure that 
  *         will be configured.
  * @retval None
  */
void HAL_RCCEx_GetPeriphCLKConfig(RCC_PeriphCLKInitTypeDef  *PeriphClkInit)
{
  uint32_t tempreg;
  
  /* Set all possible values for the extended clock type parameter------------*/
  PeriphClkInit->PeriphClockSelection = RCC_PERIPHCLK_I2S_APB1 | RCC_PERIPHCLK_I2S_APB2 |\
                                        RCC_PERIPHCLK_SAI1     | RCC_PERIPHCLK_SAI2     |\
                                        RCC_PERIPHCLK_TIM      | RCC_PERIPHCLK_RTC      |\
                                        RCC_PERIPHCLK_CEC      | RCC_PERIPHCLK_FMPI2C1  |\
                                        RCC_PERIPHCLK_CK48     | RCC_PERIPHCLK_SDIO     |\
                                        RCC_PERIPHCLK_SPDIFRX;
  
  /* Get the PLLI2S Clock configuration -----------------------------------------------*/
  PeriphClkInit->PLLI2S.PLLI2SM = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SM) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SM));
  PeriphClkInit->PLLI2S.PLLI2SN = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SN));
  PeriphClkInit->PLLI2S.PLLI2SP = (uint32_t)((((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SP) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SP)) + 1) << 1);
  PeriphClkInit->PLLI2S.PLLI2SQ = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SQ) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SQ));
  PeriphClkInit->PLLI2S.PLLI2SR = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SR));
  /* Get the PLLSAI Clock configuration -----------------------------------------------*/
  PeriphClkInit->PLLSAI.PLLSAIM = (uint32_t)((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIM) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIM));
  PeriphClkInit->PLLSAI.PLLSAIN = (uint32_t)((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIN) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIN));
  PeriphClkInit->PLLSAI.PLLSAIP = (uint32_t)((((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIP) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIP)) + 1) << 1);
  PeriphClkInit->PLLSAI.PLLSAIQ = (uint32_t)((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIQ) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIQ)); 
  /* Get the PLLSAI/PLLI2S division factors -------------------------------------------*/
  PeriphClkInit->PLLI2SDivQ = (uint32_t)((RCC->DCKCFGR & RCC_DCKCFGR_PLLI2SDIVQ) >> POSITION_VAL(RCC_DCKCFGR_PLLI2SDIVQ));
  PeriphClkInit->PLLSAIDivQ = (uint32_t)((RCC->DCKCFGR & RCC_DCKCFGR_PLLSAIDIVQ) >> POSITION_VAL(RCC_DCKCFGR_PLLSAIDIVQ));

  /* Get the SAI1 clock configuration ----------------------------------------------*/
  PeriphClkInit->Sai1ClockSelection = __HAL_RCC_GET_SAI1_SOURCE();
  
  /* Get the SAI2 clock configuration ----------------------------------------------*/
  PeriphClkInit->Sai2ClockSelection = __HAL_RCC_GET_SAI2_SOURCE();
  
  /* Get the I2S APB1 clock configuration ------------------------------------------*/
  PeriphClkInit->I2sApb1ClockSelection = __HAL_RCC_GET_I2S_APB1_SOURCE();
  
  /* Get the I2S APB2 clock configuration ------------------------------------------*/
  PeriphClkInit->I2sApb2ClockSelection = __HAL_RCC_GET_I2S_APB2_SOURCE();
  
  /* Get the RTC Clock configuration -----------------------------------------------*/
  tempreg = (RCC->CFGR & RCC_CFGR_RTCPRE);
  PeriphClkInit->RTCClockSelection = (uint32_t)((tempreg) | (RCC->BDCR & RCC_BDCR_RTCSEL));
  
  /* Get the CEC clock configuration -----------------------------------------------*/
  PeriphClkInit->CecClockSelection = __HAL_RCC_GET_CEC_SOURCE();
  
  /* Get the FMPI2C1 clock configuration -----------------------------------------------*/
  PeriphClkInit->Fmpi2c1ClockSelection = __HAL_RCC_GET_FMPI2C1_SOURCE();
  
  /* Get the CK48 clock configuration -----------------------------------------------*/
  PeriphClkInit->Clk48ClockSelection = __HAL_RCC_GET_CLK48_SOURCE();
  
  /* Get the SDIO clock configuration -----------------------------------------------*/
  PeriphClkInit->SdioClockSelection = __HAL_RCC_GET_SDIO_SOURCE();
  
  /* Get the SPDIFRX clock configuration ----------------------------------------------*/
  PeriphClkInit->SpdifClockSelection = __HAL_RCC_GET_SPDIFRX_SOURCE();
  
  /* Get the TIM Prescaler configuration --------------------------------------------*/
  if ((RCC->DCKCFGR & RCC_DCKCFGR_TIMPRE) == RESET)
  {
    PeriphClkInit->TIMPresSelection = RCC_TIMPRES_DESACTIVATED;
  }
  else
  {
    PeriphClkInit->TIMPresSelection = RCC_TIMPRES_ACTIVATED;
  }
}

/**
  * @brief  Return the peripheral clock frequency for a given peripheral(SAI..) 
  * @note   Return 0 if peripheral clock identifier not managed by this API
  * @param  PeriphClk: Peripheral clock identifier
  *         This parameter can be one of the following values:
  *            @arg RCC_PERIPHCLK_SAI1: SAI1 peripheral clock
  *            @arg RCC_PERIPHCLK_SAI2: SAI2 peripheral clock
  * @retval Frequency in KHz
  */
uint32_t HAL_RCCEx_GetPeriphCLKFreq(uint32_t PeriphClk)
{
  uint32_t tmpreg1 = 0;
  /* This variable used to store the SAI clock frequency (value in Hz) */
  uint32_t frequency = 0;
  /* This variable used to store the VCO Input (value in Hz) */
  uint32_t vcoinput = 0;
  /* This variable used to store the SAI clock source */
  uint32_t saiclocksource = 0;
  if ((PeriphClk == RCC_PERIPHCLK_SAI1) || (PeriphClk == RCC_PERIPHCLK_SAI2))
  {
    saiclocksource = RCC->DCKCFGR;   
    saiclocksource &= (RCC_DCKCFGR_SAI1SRC | RCC_DCKCFGR_SAI2SRC);
    switch (saiclocksource)
    {
    case 0: /* PLLSAI is the clock source for SAI*/ 
      {
        /* Configure the PLLSAI division factor */
        /* PLLSAI_VCO Input  = PLL_SOURCE/PLLSAIM */ 
        if((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLSOURCE_HSI)
        {
          /* In Case the PLL Source is HSI (Internal Clock) */
          vcoinput = (HSI_VALUE / (uint32_t)(RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIM));
        }
        else
        {
          /* In Case the PLL Source is HSE (External Clock) */
          vcoinput = ((HSE_VALUE / (uint32_t)(RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIM)));
        }   
        /* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN */
        /* SAI_CLK(first level) = PLLSAI_VCO Output/PLLSAIQ */
        tmpreg1 = (RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIQ) >> 24;
        frequency = (vcoinput * ((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIN) >> 6))/(tmpreg1);
        
        /* SAI_CLK_x = SAI_CLK(first level)/PLLSAIDIVQ */
        tmpreg1 = (((RCC->DCKCFGR & RCC_DCKCFGR_PLLSAIDIVQ) >> 8) + 1);
        frequency = frequency/(tmpreg1); 
        break;       
      }
    case RCC_DCKCFGR_SAI1SRC_0: /* PLLI2S is the clock source for SAI*/
    case RCC_DCKCFGR_SAI2SRC_0: /* PLLI2S is the clock source for SAI*/
      {  
        /* Configure the PLLI2S division factor */
        /* PLLI2S_VCO Input  = PLL_SOURCE/PLLI2SM */ 
        if((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLSOURCE_HSI)
        {
          /* In Case the PLL Source is HSI (Internal Clock) */
          vcoinput = (HSI_VALUE / (uint32_t)(RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SM));
        }
        else
        {
          /* In Case the PLL Source is HSE (External Clock) */
          vcoinput = ((HSE_VALUE / (uint32_t)(RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SM)));
        }
        
        /* PLLI2S_VCO Output = PLLI2S_VCO Input * PLLI2SN */
        /* SAI_CLK(first level) = PLLI2S_VCO Output/PLLI2SQ */
        tmpreg1 = (RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SQ) >> 24;
        frequency = (vcoinput * ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> 6))/(tmpreg1);
        
        /* SAI_CLK_x = SAI_CLK(first level)/PLLI2SDIVQ */
        tmpreg1 = ((RCC->DCKCFGR & RCC_DCKCFGR_PLLI2SDIVQ) + 1); 
        frequency = frequency/(tmpreg1);
        break;   
      }
    case RCC_DCKCFGR_SAI1SRC_1: /* PLLR is the clock source for SAI*/
    case RCC_DCKCFGR_SAI2SRC_1: /* PLLR is the clock source for SAI*/
      {
        /* Configure the PLLI2S division factor */
        /* PLL_VCO Input  = PLL_SOURCE/PLLM */ 
        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)));
        }
        
        /* PLL_VCO Output = PLL_VCO Input * PLLN */
        /* SAI_CLK_x = PLL_VCO Output/PLLR */
        tmpreg1 = (RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> 28;
        frequency = (vcoinput * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> 6))/(tmpreg1);
        break;       
      }
    case RCC_DCKCFGR_SAI1SRC: /* External clock is the clock source for SAI*/
      {
        frequency = EXTERNAL_CLOCK_VALUE;
        break;      
      }
    case RCC_DCKCFGR_SAI2SRC: /* PLLSRC(HSE or HSI) is the clock source for SAI*/
      {
        if((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLSOURCE_HSI)
        {
          /* In Case the PLL Source is HSI (Internal Clock) */
          frequency = (uint32_t)(HSI_VALUE);
        }
        else
        {
          /* In Case the PLL Source is HSE (External Clock) */
          frequency = (uint32_t)(HSE_VALUE);
        }
        break;      
      }     
    default :
      {
        break;
      }     
    }
  }
  return frequency;  
}

#endif /* STM32F446xx */

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx)
/**
  * @brief  Initializes the RCC extended peripherals clocks according to the specified
  *         parameters in the RCC_PeriphCLKInitTypeDef.
  * @param  PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef structure that
  *         contains the configuration information for the Extended Peripherals
  *         clocks(I2S, SAI, LTDC RTC and TIM).
  *         
  * @note   Care must be taken when HAL_RCCEx_PeriphCLKConfig() is used to select 
  *         the RTC clock source; in this case the Backup domain will be reset in  
  *         order to modify the RTC Clock source, as consequence RTC registers (including 
  *         the backup registers) and RCC_BDCR register are set to their reset values.
  *
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_RCCEx_PeriphCLKConfig(RCC_PeriphCLKInitTypeDef  *PeriphClkInit)
{
  uint32_t tickstart = 0;
  uint32_t tmpreg1 = 0;
    
  /* Check the parameters */
  assert_param(IS_RCC_PERIPHCLOCK(PeriphClkInit->PeriphClockSelection));
  
  /*----------------------- SAI/I2S Configuration (PLLI2S) -------------------------*/
  
  /*----------------------- Common configuration SAI/I2S ---------------------------*/
  /* In Case of SAI or I2S Clock Configuration through PLLI2S, PLLI2SN division   
     factor is common parameters for both peripherals */ 
  if((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2S) == RCC_PERIPHCLK_I2S) || 
     (((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI_PLLI2S) == RCC_PERIPHCLK_SAI_PLLI2S))
  {
    /* check for Parameters */
    assert_param(IS_RCC_PLLI2SN_VALUE(PeriphClkInit->PLLI2S.PLLI2SN));
        
    /* Disable the PLLI2S */
    __HAL_RCC_PLLI2S_DISABLE();    
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLI2S is disabled */
    while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLI2SRDY)  != RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLI2S_TIMEOUT_VALUE)
      {
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }
    
    /*---------------------------- I2S configuration -------------------------------*/
    /* In Case of I2S Clock Configuration through PLLI2S, PLLI2SR must be added   
      only for I2S configuration */     
    if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2S) == (RCC_PERIPHCLK_I2S))
    {
      /* check for Parameters */
      assert_param(IS_RCC_PLLI2SR_VALUE(PeriphClkInit->PLLI2S.PLLI2SR));
      /* Configure the PLLI2S division factors */
      /* PLLI2S_VCO = f(VCO clock) = f(PLLI2S clock input) × (PLLI2SN/PLLM) */
      /* I2SCLK = f(PLLI2S clock output) = f(VCO clock) / PLLI2SR */
      __HAL_RCC_PLLI2S_CONFIG(PeriphClkInit->PLLI2S.PLLI2SN , PeriphClkInit->PLLI2S.PLLI2SR);
    }
  
    /*---------------------------- SAI configuration -------------------------------*/ 
    /* In Case of SAI Clock Configuration through PLLI2S, PLLI2SQ and PLLI2S_DIVQ must  
       be added only for SAI configuration */     
    if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI_PLLI2S) == (RCC_PERIPHCLK_SAI_PLLI2S))
    {
      /* Check the PLLI2S division factors */
      assert_param(IS_RCC_PLLI2SQ_VALUE(PeriphClkInit->PLLI2S.PLLI2SQ));
      assert_param(IS_RCC_PLLI2S_DIVQ_VALUE(PeriphClkInit->PLLI2SDivQ));
      
      /* Read PLLI2SR value from PLLI2SCFGR register (this value is not need for SAI configuration) */
      tmpreg1 = ((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SR));
      /* Configure the PLLI2S division factors */      
      /* PLLI2S_VCO Input  = PLL_SOURCE/PLLM */
      /* PLLI2S_VCO Output = PLLI2S_VCO Input * PLLI2SN */
      /* SAI_CLK(first level) = PLLI2S_VCO Output/PLLI2SQ */
      __HAL_RCC_PLLI2S_SAICLK_CONFIG(PeriphClkInit->PLLI2S.PLLI2SN , PeriphClkInit->PLLI2S.PLLI2SQ , tmpreg1);
      /* SAI_CLK_x = SAI_CLK(first level)/PLLI2SDIVQ */ 
      __HAL_RCC_PLLI2S_PLLSAICLKDIVQ_CONFIG(PeriphClkInit->PLLI2SDivQ);
    }
    
    /* Enable the PLLI2S */
    __HAL_RCC_PLLI2S_ENABLE();
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLI2S is ready */
    while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLI2SRDY)  == RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLI2S_TIMEOUT_VALUE)
      {
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }
  }
  
  /*----------------------- SAI/LTDC Configuration (PLLSAI) ------------------*/
  
  /*----------------------- Common configuration SAI/LTDC --------------------*/
  /* In Case of SAI or LTDC Clock Configuration through PLLSAI, PLLSAIN division
     factor is common parameters for both peripherals */ 
  if((((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI_PLLSAI) == RCC_PERIPHCLK_SAI_PLLSAI) || 
     (((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_LTDC) == RCC_PERIPHCLK_LTDC))
  {
    /* Check the PLLSAI division factors */
    assert_param(IS_RCC_PLLSAIN_VALUE(PeriphClkInit->PLLSAI.PLLSAIN));
 
    /* Disable PLLSAI Clock */
    __HAL_RCC_PLLSAI_DISABLE(); 
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLSAI is disabled */
    while(__HAL_RCC_PLLSAI_GET_FLAG() != RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLSAI_TIMEOUT_VALUE)
      { 
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }
    
    /*---------------------------- SAI configuration -------------------------*/
    /* In Case of SAI Clock Configuration through PLLSAI, PLLSAIQ and PLLSAI_DIVQ must  
       be added only for SAI configuration */     
    if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_SAI_PLLSAI) == (RCC_PERIPHCLK_SAI_PLLSAI))
    {
      assert_param(IS_RCC_PLLSAIQ_VALUE(PeriphClkInit->PLLSAI.PLLSAIQ));
      assert_param(IS_RCC_PLLSAI_DIVQ_VALUE(PeriphClkInit->PLLSAIDivQ));
      
      /* Read PLLSAIR value from PLLSAICFGR register (this value is not need for SAI configuration) */
      tmpreg1 = ((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIR) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIR));
      /* PLLSAI_VCO Input  = PLL_SOURCE/PLLM */
      /* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN */
      /* SAI_CLK(first level) = PLLSAI_VCO Output/PLLSAIQ */
      __HAL_RCC_PLLSAI_CONFIG(PeriphClkInit->PLLSAI.PLLSAIN , PeriphClkInit->PLLSAI.PLLSAIQ, tmpreg1);
      /* SAI_CLK_x = SAI_CLK(first level)/PLLSAIDIVQ */ 
      __HAL_RCC_PLLSAI_PLLSAICLKDIVQ_CONFIG(PeriphClkInit->PLLSAIDivQ);
    }
    
    /*---------------------------- LTDC configuration ------------------------*/
    if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_LTDC) == (RCC_PERIPHCLK_LTDC))
    {
      assert_param(IS_RCC_PLLSAIR_VALUE(PeriphClkInit->PLLSAI.PLLSAIR));
      assert_param(IS_RCC_PLLSAI_DIVR_VALUE(PeriphClkInit->PLLSAIDivR));
      
      /* Read PLLSAIR value from PLLSAICFGR register (this value is not need for SAI configuration) */
      tmpreg1 = ((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIQ) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIQ));
      /* PLLSAI_VCO Input  = PLL_SOURCE/PLLM */
      /* PLLSAI_VCO Output = PLLSAI_VCO Input * PLLSAIN */
      /* LTDC_CLK(first level) = PLLSAI_VCO Output/PLLSAIR */
      __HAL_RCC_PLLSAI_CONFIG(PeriphClkInit->PLLSAI.PLLSAIN , tmpreg1, PeriphClkInit->PLLSAI.PLLSAIR);
      /* LTDC_CLK = LTDC_CLK(first level)/PLLSAIDIVR */ 
      __HAL_RCC_PLLSAI_PLLSAICLKDIVR_CONFIG(PeriphClkInit->PLLSAIDivR);
    }    
    /* Enable PLLSAI Clock */
    __HAL_RCC_PLLSAI_ENABLE();
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLSAI is ready */
    while(__HAL_RCC_PLLSAI_GET_FLAG() == RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLSAI_TIMEOUT_VALUE)
      { 
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }  
  }

   
  /*---------------------------- RTC configuration ---------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_RTC) == (RCC_PERIPHCLK_RTC))
  {
    /* Enable Power Clock*/
    __HAL_RCC_PWR_CLK_ENABLE();
    
    /* Enable write access to Backup domain */
    PWR->CR |= PWR_CR_DBP;
    
    /* Get tick */
    tickstart = HAL_GetTick();
    
    while((PWR->CR & PWR_CR_DBP) == RESET)
    {
      if((HAL_GetTick() - tickstart ) > RCC_DBP_TIMEOUT_VALUE)
      {
        return HAL_TIMEOUT;
      }      
    }
    
    /* Reset the Backup domain only if the RTC Clock source selection is modified */ 
    if((RCC->BDCR & RCC_BDCR_RTCSEL) != (PeriphClkInit->RTCClockSelection & RCC_BDCR_RTCSEL))
    {
      /* Store the content of BDCR register before the reset of Backup Domain */
      tmpreg1 = (RCC->BDCR & ~(RCC_BDCR_RTCSEL));
      /* RTC Clock selection can be changed only if the Backup Domain is reset */
      __HAL_RCC_BACKUPRESET_FORCE();
      __HAL_RCC_BACKUPRESET_RELEASE();
      /* Restore the Content of BDCR register */
      RCC->BDCR = tmpreg1;
    }
    
    /* If LSE is selected as RTC clock source, wait for LSE reactivation */
    if(PeriphClkInit->RTCClockSelection == RCC_RTCCLKSOURCE_LSE)
    {
      /* Get tick */
      tickstart = HAL_GetTick();
      
      /* Wait till LSE is ready */  
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET)
      {
        if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        }      
      }  
    }
    __HAL_RCC_RTC_CONFIG(PeriphClkInit->RTCClockSelection); 
  }
  
  /*---------------------------- TIM configuration ---------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_TIM) == (RCC_PERIPHCLK_TIM))
  {
    __HAL_RCC_TIMCLKPRESCALER(PeriphClkInit->TIMPresSelection);
  }
  return HAL_OK;
}

/**
  * @brief  Configures the RCC_OscInitStruct according to the internal 
  * RCC configuration registers.
  * @param  PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef structure that 
  *         will be configured.
  * @retval None
  */
void HAL_RCCEx_GetPeriphCLKConfig(RCC_PeriphCLKInitTypeDef  *PeriphClkInit)
{
  uint32_t tempreg;
  
  /* Set all possible values for the extended clock type parameter------------*/
  PeriphClkInit->PeriphClockSelection = RCC_PERIPHCLK_I2S | RCC_PERIPHCLK_SAI_PLLSAI | RCC_PERIPHCLK_SAI_PLLI2S | RCC_PERIPHCLK_LTDC | RCC_PERIPHCLK_TIM | RCC_PERIPHCLK_RTC;
  
  /* Get the PLLI2S Clock configuration -----------------------------------------------*/
  PeriphClkInit->PLLI2S.PLLI2SN = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SN));
  PeriphClkInit->PLLI2S.PLLI2SR = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SR));
  PeriphClkInit->PLLI2S.PLLI2SQ = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SQ) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SQ));
  /* Get the PLLSAI Clock configuration -----------------------------------------------*/
  PeriphClkInit->PLLSAI.PLLSAIN = (uint32_t)((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIN) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIN));
  PeriphClkInit->PLLSAI.PLLSAIR = (uint32_t)((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIR) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIR));
  PeriphClkInit->PLLSAI.PLLSAIQ = (uint32_t)((RCC->PLLSAICFGR & RCC_PLLSAICFGR_PLLSAIQ) >> POSITION_VAL(RCC_PLLSAICFGR_PLLSAIQ)); 
  /* Get the PLLSAI/PLLI2S division factors -----------------------------------------------*/
  PeriphClkInit->PLLI2SDivQ = (uint32_t)((RCC->DCKCFGR & RCC_DCKCFGR_PLLI2SDIVQ) >> POSITION_VAL(RCC_DCKCFGR_PLLI2SDIVQ));
  PeriphClkInit->PLLSAIDivQ = (uint32_t)((RCC->DCKCFGR & RCC_DCKCFGR_PLLSAIDIVQ) >> POSITION_VAL(RCC_DCKCFGR_PLLSAIDIVQ));
  PeriphClkInit->PLLSAIDivR = (uint32_t)(RCC->DCKCFGR & RCC_DCKCFGR_PLLSAIDIVR);
  /* Get the RTC Clock configuration -----------------------------------------------*/
  tempreg = (RCC->CFGR & RCC_CFGR_RTCPRE);
  PeriphClkInit->RTCClockSelection = (uint32_t)((tempreg) | (RCC->BDCR & RCC_BDCR_RTCSEL));
  
  if ((RCC->DCKCFGR & RCC_DCKCFGR_TIMPRE) == RESET)
  {
    PeriphClkInit->TIMPresSelection = RCC_TIMPRES_DESACTIVATED;
  }
  else
  {
    PeriphClkInit->TIMPresSelection = RCC_TIMPRES_ACTIVATED;
  }
}

#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx */

#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx)|| defined(STM32F417xx) ||\
    defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE)
/**
  * @brief  Initializes the RCC extended peripherals clocks according to the specified parameters in the
  *         RCC_PeriphCLKInitTypeDef.
  * @param  PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef structure that
  *         contains the configuration information for the Extended Peripherals clocks(I2S and RTC clocks).
  *         
  * @note   A caution to be taken when HAL_RCCEx_PeriphCLKConfig() is used to select RTC clock selection, in this case 
  *         the Reset of Backup domain will be applied in order to modify the RTC Clock source as consequence all backup 
  *        domain (RTC and RCC_BDCR register expect BKPSRAM) will be reset
  *              
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_RCCEx_PeriphCLKConfig(RCC_PeriphCLKInitTypeDef  *PeriphClkInit)
{
  uint32_t tickstart = 0;
  uint32_t tmpreg1 = 0;
    
  /* Check the parameters */
  assert_param(IS_RCC_PERIPHCLOCK(PeriphClkInit->PeriphClockSelection));
  
  /*---------------------------- I2S configuration ---------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_I2S) == (RCC_PERIPHCLK_I2S))
  {
    /* check for Parameters */
    assert_param(IS_RCC_PLLI2SR_VALUE(PeriphClkInit->PLLI2S.PLLI2SR));
    assert_param(IS_RCC_PLLI2SN_VALUE(PeriphClkInit->PLLI2S.PLLI2SN));
#if defined(STM32F411xE)    
    assert_param(IS_RCC_PLLI2SM_VALUE(PeriphClkInit->PLLI2S.PLLI2SM));
#endif /* STM32F411xE */
    /* Disable the PLLI2S */
    __HAL_RCC_PLLI2S_DISABLE();
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLI2S is disabled */
    while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLI2SRDY)  != RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLI2S_TIMEOUT_VALUE)
      {
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      } 
    }

#if defined(STM32F411xE)
    /* Configure the PLLI2S division factors */
    /* PLLI2S_VCO = f(VCO clock) = f(PLLI2S clock input) × (PLLI2SN/PLLI2SM) */
    /* I2SCLK = f(PLLI2S clock output) = f(VCO clock) / PLLI2SR */    
    __HAL_RCC_PLLI2S_I2SCLK_CONFIG(PeriphClkInit->PLLI2S.PLLI2SM, PeriphClkInit->PLLI2S.PLLI2SN, PeriphClkInit->PLLI2S.PLLI2SR);
#else
    /* Configure the PLLI2S division factors */
    /* PLLI2S_VCO = f(VCO clock) = f(PLLI2S clock input) × (PLLI2SN/PLLM) */
    /* I2SCLK = f(PLLI2S clock output) = f(VCO clock) / PLLI2SR */
    __HAL_RCC_PLLI2S_CONFIG(PeriphClkInit->PLLI2S.PLLI2SN , PeriphClkInit->PLLI2S.PLLI2SR);
#endif /* STM32F411xE */
    
    /* Enable the PLLI2S */
    __HAL_RCC_PLLI2S_ENABLE();
    /* Get tick */
    tickstart = HAL_GetTick();
    /* Wait till PLLI2S is ready */
    while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLI2SRDY)  == RESET)
    {
      if((HAL_GetTick() - tickstart ) > PLLI2S_TIMEOUT_VALUE)
      {
        /* return in case of Timeout detected */
        return HAL_TIMEOUT;
      }
    }
  }
  
  /*---------------------------- RTC configuration ---------------------------*/
  if(((PeriphClkInit->PeriphClockSelection) & RCC_PERIPHCLK_RTC) == (RCC_PERIPHCLK_RTC))
  {
    /* Enable Power Clock*/
    __HAL_RCC_PWR_CLK_ENABLE();
    
    /* Enable write access to Backup domain */
    PWR->CR |= PWR_CR_DBP;

    /* Get tick */
    tickstart = HAL_GetTick();

    while((PWR->CR & PWR_CR_DBP) == RESET)
    {
      if((HAL_GetTick() - tickstart ) > RCC_DBP_TIMEOUT_VALUE)
      {
        return HAL_TIMEOUT;
      }      
    }
        
    /* Reset the Backup domain only if the RTC Clock source selection is modified */ 
    if((RCC->BDCR & RCC_BDCR_RTCSEL) != (PeriphClkInit->RTCClockSelection & RCC_BDCR_RTCSEL))
    {
      /* Store the content of BDCR register before the reset of Backup Domain */
      tmpreg1 = (RCC->BDCR & ~(RCC_BDCR_RTCSEL));
      /* RTC Clock selection can be changed only if the Backup Domain is reset */
      __HAL_RCC_BACKUPRESET_FORCE();
      __HAL_RCC_BACKUPRESET_RELEASE();
      /* Restore the Content of BDCR register */
      RCC->BDCR = tmpreg1;
    }
      
    /* If LSE is selected as RTC clock source, wait for LSE reactivation */
    if(PeriphClkInit->RTCClockSelection == RCC_RTCCLKSOURCE_LSE)
    {
      /* Get tick */
      tickstart = HAL_GetTick();

      /* Wait till LSE is ready */  
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET)
      {
        if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        }
      }  
    }
    __HAL_RCC_RTC_CONFIG(PeriphClkInit->RTCClockSelection); 
  }
  
  return HAL_OK;
}

/**
  * @brief  Configures the RCC_OscInitStruct according to the internal 
  * RCC configuration registers.
  * @param  PeriphClkInit: pointer to an RCC_PeriphCLKInitTypeDef structure that 
  * will be configured.
  * @retval None
  */
void HAL_RCCEx_GetPeriphCLKConfig(RCC_PeriphCLKInitTypeDef  *PeriphClkInit)
{
  uint32_t tempreg;
  
  /* Set all possible values for the extended clock type parameter------------*/
  PeriphClkInit->PeriphClockSelection = RCC_PERIPHCLK_I2S | RCC_PERIPHCLK_RTC;
  
  /* Get the PLLI2S Clock configuration -----------------------------------------------*/
  PeriphClkInit->PLLI2S.PLLI2SN = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SN) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SN));
  PeriphClkInit->PLLI2S.PLLI2SR = (uint32_t)((RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SR) >> POSITION_VAL(RCC_PLLI2SCFGR_PLLI2SR));
#if defined(STM32F411xE)
  PeriphClkInit->PLLI2S.PLLI2SM = (uint32_t)(RCC->PLLI2SCFGR & RCC_PLLI2SCFGR_PLLI2SM);
#endif /* STM32F411xE */  
  /* Get the RTC Clock configuration -----------------------------------------------*/
  tempreg = (RCC->CFGR & RCC_CFGR_RTCPRE);
  PeriphClkInit->RTCClockSelection = (uint32_t)((tempreg) | (RCC->BDCR & RCC_BDCR_RTCSEL));
  
}
#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F401xC || STM32F401xE || STM32F411xE */

#if defined(STM32F411xE) || defined(STM32F446xx)
/**
  * @brief  Select LSE mode
  *   
  * @note   This mode is only available for STM32F411xx devices.
  *     
  * @param  Mode: specifies the LSE mode.
  *          This parameter can be one of the following values:
  *            @arg RCC_LSE_LOWPOWER_MODE:  LSE oscillator in low power mode selection
  *            @arg RCC_LSE_HIGHDRIVE_MODE: LSE oscillator in High Drive mode selection
  * @retval None
  */
void HAL_RCCEx_SelectLSEMode(uint8_t Mode)
{
  /* Check the parameters */
  assert_param(IS_RCC_LSE_MODE(Mode));
  if(Mode == RCC_LSE_HIGHDRIVE_MODE)
  {
    SET_BIT(RCC->BDCR, RCC_BDCR_LSEMOD);
  }
  else
  {
    CLEAR_BIT(RCC->BDCR, RCC_BDCR_LSEMOD);
  }
}

#endif /* STM32F411xE || STM32F446xx */

#if defined(STM32F446xx)
/**
  * @brief  Initializes the RCC Oscillators according to the specified parameters in the
  *         RCC_OscInitTypeDef.
  * @param  RCC_OscInitStruct: pointer to an RCC_OscInitTypeDef structure that
  *         contains the configuration information for the RCC Oscillators.
  * @note   The PLL is not disabled when used as system clock.
  * @note   This function add the PLL/PLLR factor management during PLL configuration this feature is only available in STM32F446xx devices 
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_RCC_OscConfig(RCC_OscInitTypeDef  *RCC_OscInitStruct)
{
  uint32_t tickstart = 0;  
 
  /* Check the parameters */
  assert_param(IS_RCC_OSCILLATORTYPE(RCC_OscInitStruct->OscillatorType));
  /*------------------------------- HSE Configuration ------------------------*/ 
  if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_HSE) == RCC_OSCILLATORTYPE_HSE)
  {
    /* Check the parameters */
    assert_param(IS_RCC_HSE(RCC_OscInitStruct->HSEState));
    /* When the HSE is used as system clock or clock source for PLL in these cases HSE will not disabled */
    if((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_HSE)                                                                     ||\
      ((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_PLL) && ((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLCFGR_PLLSRC_HSE)) ||\
      ((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_PLLR) && ((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLCFGR_PLLSRC_HSE)))
    {
      if((__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET) && (RCC_OscInitStruct->HSEState == RCC_HSE_OFF))
      {
        return HAL_ERROR;
      }
    }
    else
    {
      /* Reset HSEON and HSEBYP bits before configuring the HSE --------------*/
      __HAL_RCC_HSE_CONFIG(RCC_HSE_OFF);
      
      /* Get Start Tick*/
      tickstart = HAL_GetTick();
      
      /* Wait till HSE is disabled */  
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET)
      {
        if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        }       
      }
      
      /* Set the new HSE configuration ---------------------------------------*/
      __HAL_RCC_HSE_CONFIG(RCC_OscInitStruct->HSEState);
      
      /* Check the HSE State */
      if((RCC_OscInitStruct->HSEState) != RCC_HSE_OFF)
      {
        /* Get Start Tick*/
        tickstart = HAL_GetTick();
      
        /* Wait till HSE is ready */  
        while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) == RESET)
        {
          if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
          {
            return HAL_TIMEOUT;
          } 
        }
      }
      else
      {
        /* Get Start Tick*/
        tickstart = HAL_GetTick();

        /* Wait till HSE is bypassed or disabled */
        while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSERDY) != RESET)
        {
          if((HAL_GetTick() - tickstart ) > HSE_TIMEOUT_VALUE)
          {
            return HAL_TIMEOUT;
          } 
        }
      }
    }
  }
  /*----------------------------- HSI Configuration --------------------------*/
  if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_HSI) == RCC_OSCILLATORTYPE_HSI)
  {
    /* Check the parameters */
    assert_param(IS_RCC_HSI(RCC_OscInitStruct->HSIState));
    assert_param(IS_RCC_CALIBRATION_VALUE(RCC_OscInitStruct->HSICalibrationValue));
    
    /* Check if HSI is used as system clock or as PLL source when PLL is selected as system clock */
    if((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_HSI)                                                                     ||\
      ((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_PLL) && ((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLCFGR_PLLSRC_HSI)) ||\
      ((__HAL_RCC_GET_SYSCLK_SOURCE() == RCC_CFGR_SWS_PLLR) && ((RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC) == RCC_PLLCFGR_PLLSRC_HSI)))
    {
      /* When HSI is used as system clock it will not disabled */
      if((__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) && (RCC_OscInitStruct->HSIState != RCC_HSI_ON))
      {
        return HAL_ERROR;
      }
      /* Otherwise, just the calibration is allowed */
      else
      {
        /* Adjusts the Internal High Speed oscillator (HSI) calibration value.*/
        __HAL_RCC_HSI_CALIBRATIONVALUE_ADJUST(RCC_OscInitStruct->HSICalibrationValue);
      }
    }
    else
    {
      /* Check the HSI State */
      if((RCC_OscInitStruct->HSIState)!= RCC_HSI_OFF)
      {
        /* Enable the Internal High Speed oscillator (HSI). */
        __HAL_RCC_HSI_ENABLE();

        /* Get Start Tick*/
        tickstart = HAL_GetTick();

        /* Wait till HSI is ready */  
        while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) == RESET)
        {
          if((HAL_GetTick() - tickstart ) > HSI_TIMEOUT_VALUE)
          {
            return HAL_TIMEOUT;
          }       
        } 
                
        /* Adjusts the Internal High Speed oscillator (HSI) calibration value.*/
        __HAL_RCC_HSI_CALIBRATIONVALUE_ADJUST(RCC_OscInitStruct->HSICalibrationValue);
      }
      else
      {
        /* Disable the Internal High Speed oscillator (HSI). */
        __HAL_RCC_HSI_DISABLE();

        /* Get Start Tick*/
        tickstart = HAL_GetTick();
      
        /* Wait till HSI is ready */  
        while(__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET)
        {
          if((HAL_GetTick() - tickstart ) > HSI_TIMEOUT_VALUE)
          {
            return HAL_TIMEOUT;
          } 
        } 
      }
    }
  }
  /*------------------------------ LSI Configuration -------------------------*/
  if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_LSI) == RCC_OSCILLATORTYPE_LSI)
  {
    /* Check the parameters */
    assert_param(IS_RCC_LSI(RCC_OscInitStruct->LSIState));

    /* Check the LSI State */
    if((RCC_OscInitStruct->LSIState)!= RCC_LSI_OFF)
    {
      /* Enable the Internal Low Speed oscillator (LSI). */
      __HAL_RCC_LSI_ENABLE();
      
      /* Get Start Tick*/
      tickstart = HAL_GetTick();
      
      /* Wait till LSI is ready */
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) == RESET)
      {
        if((HAL_GetTick() - tickstart ) > LSI_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        } 
      }
    }
    else
    {
      /* Disable the Internal Low Speed oscillator (LSI). */
      __HAL_RCC_LSI_DISABLE();
      
      /* Get Start Tick*/
      tickstart = HAL_GetTick();
      
      /* Wait till LSI is ready */  
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSIRDY) != RESET)
      {
        if((HAL_GetTick() - tickstart ) > LSI_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        }       
      } 
    }
  }
  /*------------------------------ LSE Configuration -------------------------*/ 
  if(((RCC_OscInitStruct->OscillatorType) & RCC_OSCILLATORTYPE_LSE) == RCC_OSCILLATORTYPE_LSE)
  {
    /* Check the parameters */
    assert_param(IS_RCC_LSE(RCC_OscInitStruct->LSEState));
    
    /* Enable Power Clock*/
    __HAL_RCC_PWR_CLK_ENABLE();
    
    /* Enable write access to Backup domain */
    PWR->CR |= PWR_CR_DBP;
    
    /* Wait for Backup domain Write protection disable */
    tickstart = HAL_GetTick();
    
    while((PWR->CR & PWR_CR_DBP) == RESET)
    {
      if((HAL_GetTick() - tickstart ) > RCC_DBP_TIMEOUT_VALUE)
      {
        return HAL_TIMEOUT;
      }      
    }
    
    /* Reset LSEON and LSEBYP bits before configuring the LSE ----------------*/
    __HAL_RCC_LSE_CONFIG(RCC_LSE_OFF);
    
    /* Get Start Tick*/
    tickstart = HAL_GetTick();
    
    /* Wait till LSE is ready */  
    while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) != RESET)
    {
      if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
      {
        return HAL_TIMEOUT;
      }    
    } 
    
    /* Set the new LSE configuration -----------------------------------------*/
    __HAL_RCC_LSE_CONFIG(RCC_OscInitStruct->LSEState);
    /* Check the LSE State */
    if((RCC_OscInitStruct->LSEState) != RCC_LSE_OFF)
    {
      /* Get Start Tick*/
      tickstart = HAL_GetTick();
      
      /* Wait till LSE is ready */  
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) == RESET)
      {
        if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        }       
      }
    }
    else
    {
      /* Get Start Tick*/
      tickstart = HAL_GetTick();
      
      /* Wait till LSE is ready */  
      while(__HAL_RCC_GET_FLAG(RCC_FLAG_LSERDY) != RESET)
      {
        if((HAL_GetTick() - tickstart ) > RCC_LSE_TIMEOUT_VALUE)
        {
          return HAL_TIMEOUT;
        }       
      }
    }
  }
  /*-------------------------------- PLL Configuration -----------------------*/
  /* Check the parameters */
  assert_param(IS_RCC_PLL(RCC_OscInitStruct->PLL.PLLState));
  if ((RCC_OscInitStruct->PLL.PLLState) != RCC_PLL_NONE)
  {
    /* Check if the PLL is used as system clock or not */
    if(__HAL_RCC_GET_SYSCLK_SOURCE() != RCC_CFGR_SWS_PLL)
    { 
      if((RCC_OscInitStruct->PLL.PLLState) == RCC_PLL_ON)
      {
        /* Check the parameters */
        assert_param(IS_RCC_PLLSOURCE(RCC_OscInitStruct->PLL.PLLSource));
        assert_param(IS_RCC_PLLM_VALUE(RCC_OscInitStruct->PLL.PLLM));
        assert_param(IS_RCC_PLLN_VALUE(RCC_OscInitStruct->PLL.PLLN));
        assert_param(IS_RCC_PLLP_VALUE(RCC_OscInitStruct->PLL.PLLP));
        assert_param(IS_RCC_PLLQ_VALUE(RCC_OscInitStruct->PLL.PLLQ));
        assert_param(IS_RCC_PLLR_VALUE(RCC_OscInitStruct->PLL.PLLR));
      
        /* Disable the main PLL. */
        __HAL_RCC_PLL_DISABLE();
        
        /* Get Start Tick*/
        tickstart = HAL_GetTick();
        
        /* Wait till PLL is ready */  
        while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
        {
          if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
          {
            return HAL_TIMEOUT;
          }
        }        

        /* Configure the main PLL clock source, multiplication and division factors. */
        __HAL_RCC_PLL_CONFIG(RCC_OscInitStruct->PLL.PLLSource,
                             RCC_OscInitStruct->PLL.PLLM,
                             RCC_OscInitStruct->PLL.PLLN,
                             RCC_OscInitStruct->PLL.PLLP,
                             RCC_OscInitStruct->PLL.PLLQ,
                             RCC_OscInitStruct->PLL.PLLR);

        /* Enable the main PLL. */
        __HAL_RCC_PLL_ENABLE();

        /* Get Start Tick*/
        tickstart = HAL_GetTick();
        
        /* Wait till PLL is ready */  
        while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) == RESET)
        {
          if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
          {
            return HAL_TIMEOUT;
          } 
        }
      }
      else
      {
        /* Disable the main PLL. */
        __HAL_RCC_PLL_DISABLE();
 
        /* Get Start Tick*/
        tickstart = HAL_GetTick();
        
        /* Wait till PLL is ready */  
        while(__HAL_RCC_GET_FLAG(RCC_FLAG_PLLRDY) != RESET)
        {
          if((HAL_GetTick() - tickstart ) > PLL_TIMEOUT_VALUE)
          {
            return HAL_TIMEOUT;
          }
        }
      }
    }
    else
    {
      return HAL_ERROR;
    }
  }
  return HAL_OK;
}

/**
  * @brief  Configures the RCC_OscInitStruct according to the internal 
  * RCC configuration registers.
  * @param  RCC_OscInitStruct: pointer to an RCC_OscInitTypeDef structure that will be configured.
  *
  * @note   This function is only available in case of STM32F446xx devices.
  * @note   This function add the PLL/PLLR factor management
  * @retval None
  */
void HAL_RCC_GetOscConfig(RCC_OscInitTypeDef  *RCC_OscInitStruct)
{
  /* Set all possible values for the Oscillator type parameter ---------------*/
  RCC_OscInitStruct->OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_LSE | RCC_OSCILLATORTYPE_LSI;
  
  /* Get the HSE configuration -----------------------------------------------*/
  if((RCC->CR &RCC_CR_HSEBYP) == RCC_CR_HSEBYP)
  {
    RCC_OscInitStruct->HSEState = RCC_HSE_BYPASS;
  }
  else if((RCC->CR &RCC_CR_HSEON) == RCC_CR_HSEON)
  {
    RCC_OscInitStruct->HSEState = RCC_HSE_ON;
  }
  else
  {
    RCC_OscInitStruct->HSEState = RCC_HSE_OFF;
  }
  
  /* Get the HSI configuration -----------------------------------------------*/
  if((RCC->CR &RCC_CR_HSION) == RCC_CR_HSION)
  {
    RCC_OscInitStruct->HSIState = RCC_HSI_ON;
  }
  else
  {
    RCC_OscInitStruct->HSIState = RCC_HSI_OFF;
  }
  
  RCC_OscInitStruct->HSICalibrationValue = (uint32_t)((RCC->CR &RCC_CR_HSITRIM) >> POSITION_VAL(RCC_CR_HSITRIM));
  
  /* Get the LSE configuration -----------------------------------------------*/
  if((RCC->BDCR &RCC_BDCR_LSEBYP) == RCC_BDCR_LSEBYP)
  {
    RCC_OscInitStruct->LSEState = RCC_LSE_BYPASS;
  }
  else if((RCC->BDCR &RCC_BDCR_LSEON) == RCC_BDCR_LSEON)
  {
    RCC_OscInitStruct->LSEState = RCC_LSE_ON;
  }
  else
  {
    RCC_OscInitStruct->LSEState = RCC_LSE_OFF;
  }
  
  /* Get the LSI configuration -----------------------------------------------*/
  if((RCC->CSR &RCC_CSR_LSION) == RCC_CSR_LSION)
  {
    RCC_OscInitStruct->LSIState = RCC_LSI_ON;
  }
  else
  {
    RCC_OscInitStruct->LSIState = RCC_LSI_OFF;
  }
  
  /* Get the PLL configuration -----------------------------------------------*/
  if((RCC->CR &RCC_CR_PLLON) == RCC_CR_PLLON)
  {
    RCC_OscInitStruct->PLL.PLLState = RCC_PLL_ON;
  }
  else
  {
    RCC_OscInitStruct->PLL.PLLState = RCC_PLL_OFF;
  }
  RCC_OscInitStruct->PLL.PLLSource = (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLSRC);
  RCC_OscInitStruct->PLL.PLLM = (uint32_t)(RCC->PLLCFGR & RCC_PLLCFGR_PLLM);
  RCC_OscInitStruct->PLL.PLLN = (uint32_t)((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN));
  RCC_OscInitStruct->PLL.PLLP = (uint32_t)((((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) + RCC_PLLCFGR_PLLP_0) << 1) >> POSITION_VAL(RCC_PLLCFGR_PLLP));
  RCC_OscInitStruct->PLL.PLLQ = (uint32_t)((RCC->PLLCFGR & RCC_PLLCFGR_PLLQ) >> POSITION_VAL(RCC_PLLCFGR_PLLQ));
  RCC_OscInitStruct->PLL.PLLR = (uint32_t)((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> POSITION_VAL(RCC_PLLCFGR_PLLR));
}

/**
  * @brief  Returns the SYSCLK frequency
  *        
  * @note   This function is only available in case of STM32F446xx devices.
  * @note   This function add the PLL/PLLR System clock source
  *
  * @note   The system frequency computed by this function is not the real 
  *         frequency in the chip. It is calculated based on the predefined 
  *         constant and the selected clock source:
  * @note     If SYSCLK source is HSI, function returns values based on HSI_VALUE(*)
  * @note     If SYSCLK source is HSE, function returns values based on HSE_VALUE(**)
  * @note     If SYSCLK source is PLL, function returns values based on HSE_VALUE(**) 
  *           or HSI_VALUE(*) multiplied/divided by the PLL factors.         
  * @note     (*) HSI_VALUE is a constant defined in stm32f4xx_hal_conf.h file (default value
  *               16 MHz) but the real value may vary depending on the variations
  *               in voltage and temperature.
  * @note     (**) HSE_VALUE is a constant defined in stm32f4xx_hal_conf.h file (default value
  *                25 MHz), user has to ensure that HSE_VALUE is same as the real
  *                frequency of the crystal used. Otherwise, this function may
  *                have wrong result.
  *                  
  * @note   The result of this function could be not correct when using fractional
  *         value for HSE crystal.
  *           
  * @note   This function can be used by the user application to compute the 
  *         baudrate for the communication peripherals or configure other parameters.
  *           
  * @note   Each time SYSCLK changes, this function must be called to update the
  *         right SYSCLK value. Otherwise, any configuration based on this function will be incorrect.
  *         
  *               
  * @retval SYSCLK frequency
  */
uint32_t HAL_RCC_GetSysClockFreq(void)
{
  uint32_t pllm = 0;
  uint32_t pllvco = 0;
  uint32_t pllp = 0;
  uint32_t pllr = 0;
  uint32_t sysclockfreq = 0;

  /* Get SYSCLK source -------------------------------------------------------*/
  switch (RCC->CFGR & RCC_CFGR_SWS)
  {
    case RCC_CFGR_SWS_HSI:  /* HSI used as system clock source */
    {
      sysclockfreq = HSI_VALUE;
       break;
    }
    case RCC_CFGR_SWS_HSE:  /* HSE used as system clock  source */
    {
      sysclockfreq = HSE_VALUE;
      break;
    }
    case RCC_CFGR_SWS_PLL:  /* PLL/PLLP used as system clock  source */
    {
      /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
      SYSCLK = PLL_VCO / PLLP */
      pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM;
      if(__HAL_RCC_GET_PLL_OSCSOURCE() != RCC_PLLSOURCE_HSI)
      {
        /* HSE used as PLL clock source */
        pllvco = ((HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN)));
      }
      else
      {
        /* HSI used as PLL clock source */
        pllvco = ((HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN)));    
      }
      pllp = ((((RCC->PLLCFGR & RCC_PLLCFGR_PLLP) >> POSITION_VAL(RCC_PLLCFGR_PLLP)) + 1 ) *2);
      
      sysclockfreq = pllvco/pllp;
      break;
    }
    case RCC_CFGR_SWS_PLLR:  /* PLL/PLLR used as system clock  source */
    {
      /* PLL_VCO = (HSE_VALUE or HSI_VALUE / PLLM) * PLLN
      SYSCLK = PLL_VCO / PLLR */
      pllm = RCC->PLLCFGR & RCC_PLLCFGR_PLLM;
      if(__HAL_RCC_GET_PLL_OSCSOURCE() != RCC_PLLSOURCE_HSI)
      {
        /* HSE used as PLL clock source */
        pllvco = ((HSE_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN)));
      }
      else
      {
        /* HSI used as PLL clock source */
        pllvco = ((HSI_VALUE / pllm) * ((RCC->PLLCFGR & RCC_PLLCFGR_PLLN) >> POSITION_VAL(RCC_PLLCFGR_PLLN)));    
      }
      pllr = ((RCC->PLLCFGR & RCC_PLLCFGR_PLLR) >> POSITION_VAL(RCC_PLLCFGR_PLLR));
      
      sysclockfreq = pllvco/pllr;
      break;
    }
    default:
    {
      sysclockfreq = HSI_VALUE;
      break;
    }
  }
  return sysclockfreq;
}
#endif /* STM32F446xx */

/**
  * @}
  */

/**
  * @}
  */

#endif /* HAL_RCC_MODULE_ENABLED */
/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/