--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_utils.c	Thu Mar 07 15:06:43 2019 +0100
@@ -0,0 +1,756 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_ll_utils.c
+  * @author  MCD Application Team
+  * @brief   UTILS LL module driver.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2017 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_ll_utils.h"
+#include "stm32f4xx_ll_rcc.h"
+#include "stm32f4xx_ll_system.h"
+#include "stm32f4xx_ll_pwr.h"
+#ifdef  USE_FULL_ASSERT
+#include "stm32_assert.h"
+#else
+#define assert_param(expr) ((void)0U)
+#endif /* USE_FULL_ASSERT */
+
+/** @addtogroup STM32F4xx_LL_Driver
+  * @{
+  */
+
+/** @addtogroup UTILS_LL
+  * @{
+  */
+
+/* Private types -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private constants ---------------------------------------------------------*/
+/** @addtogroup UTILS_LL_Private_Constants
+  * @{
+  */
+#if defined(RCC_MAX_FREQUENCY_SCALE1)
+#define UTILS_MAX_FREQUENCY_SCALE1  RCC_MAX_FREQUENCY           /*!< Maximum frequency for system clock at power scale1, in Hz */
+#endif /*RCC_MAX_FREQUENCY_SCALE1 */
+#define UTILS_MAX_FREQUENCY_SCALE2  RCC_MAX_FREQUENCY_SCALE2    /*!< Maximum frequency for system clock at power scale2, in Hz */
+#if defined(RCC_MAX_FREQUENCY_SCALE3)
+#define UTILS_MAX_FREQUENCY_SCALE3  RCC_MAX_FREQUENCY_SCALE3    /*!< Maximum frequency for system clock at power scale3, in Hz */
+#endif /* MAX_FREQUENCY_SCALE3 */
+
+/* Defines used for PLL range */
+#define UTILS_PLLVCO_INPUT_MIN      RCC_PLLVCO_INPUT_MIN        /*!< Frequency min for PLLVCO input, in Hz   */
+#define UTILS_PLLVCO_INPUT_MAX      RCC_PLLVCO_INPUT_MAX        /*!< Frequency max for PLLVCO input, in Hz   */
+#define UTILS_PLLVCO_OUTPUT_MIN     RCC_PLLVCO_OUTPUT_MIN       /*!< Frequency min for PLLVCO output, in Hz  */
+#define UTILS_PLLVCO_OUTPUT_MAX     RCC_PLLVCO_OUTPUT_MAX       /*!< Frequency max for PLLVCO output, in Hz  */
+
+/* Defines used for HSE range */
+#define UTILS_HSE_FREQUENCY_MIN      4000000U        /*!< Frequency min for HSE frequency, in Hz   */
+#define UTILS_HSE_FREQUENCY_MAX     26000000U        /*!< Frequency max for HSE frequency, in Hz   */
+
+/* Defines used for FLASH latency according to HCLK Frequency */
+#if defined(FLASH_SCALE1_LATENCY1_FREQ)
+#define UTILS_SCALE1_LATENCY1_FREQ  FLASH_SCALE1_LATENCY1_FREQ /*!< HCLK frequency to set FLASH latency 1 in power scale 1 */
+#endif
+#if defined(FLASH_SCALE1_LATENCY2_FREQ)
+#define UTILS_SCALE1_LATENCY2_FREQ  FLASH_SCALE1_LATENCY2_FREQ /*!< HCLK frequency to set FLASH latency 2 in power scale 1 */
+#endif
+#if defined(FLASH_SCALE1_LATENCY3_FREQ)
+#define UTILS_SCALE1_LATENCY3_FREQ  FLASH_SCALE1_LATENCY3_FREQ /*!< HCLK frequency to set FLASH latency 3 in power scale 1 */
+#endif
+#if defined(FLASH_SCALE1_LATENCY4_FREQ)
+#define UTILS_SCALE1_LATENCY4_FREQ  FLASH_SCALE1_LATENCY4_FREQ /*!< HCLK frequency to set FLASH latency 4 in power scale 1 */
+#endif
+#if defined(FLASH_SCALE1_LATENCY5_FREQ)
+#define UTILS_SCALE1_LATENCY5_FREQ  FLASH_SCALE1_LATENCY5_FREQ /*!< HCLK frequency to set FLASH latency 5 in power scale 1 */
+#endif
+#define UTILS_SCALE2_LATENCY1_FREQ  FLASH_SCALE2_LATENCY1_FREQ /*!< HCLK frequency to set FLASH latency 1 in power scale 2 */
+#define UTILS_SCALE2_LATENCY2_FREQ  FLASH_SCALE2_LATENCY2_FREQ /*!< HCLK frequency to set FLASH latency 2 in power scale 2 */
+#if defined(FLASH_SCALE2_LATENCY3_FREQ)
+#define UTILS_SCALE2_LATENCY3_FREQ  FLASH_SCALE2_LATENCY3_FREQ /*!< HCLK frequency to set FLASH latency 2 in power scale 2 */
+#endif
+#if defined(FLASH_SCALE2_LATENCY4_FREQ)
+#define UTILS_SCALE2_LATENCY4_FREQ  FLASH_SCALE2_LATENCY4_FREQ /*!< HCLK frequency to set FLASH latency 4 in power scale 2 */
+#endif
+#if defined(FLASH_SCALE2_LATENCY5_FREQ)
+#define UTILS_SCALE2_LATENCY5_FREQ  FLASH_SCALE2_LATENCY5_FREQ /*!< HCLK frequency to set FLASH latency 5 in power scale 2 */
+#endif
+#if defined(FLASH_SCALE3_LATENCY1_FREQ)
+#define UTILS_SCALE3_LATENCY1_FREQ  FLASH_SCALE3_LATENCY1_FREQ /*!< HCLK frequency to set FLASH latency 1 in power scale 3 */
+#endif
+#if defined(FLASH_SCALE3_LATENCY2_FREQ)
+#define UTILS_SCALE3_LATENCY2_FREQ  FLASH_SCALE3_LATENCY2_FREQ /*!< HCLK frequency to set FLASH latency 2 in power scale 3 */
+#endif
+#if defined(FLASH_SCALE3_LATENCY3_FREQ)
+#define UTILS_SCALE3_LATENCY3_FREQ  FLASH_SCALE3_LATENCY3_FREQ /*!< HCLK frequency to set FLASH latency 3 in power scale 3 */
+#endif
+#if defined(FLASH_SCALE3_LATENCY4_FREQ)
+#define UTILS_SCALE3_LATENCY4_FREQ  FLASH_SCALE3_LATENCY4_FREQ /*!< HCLK frequency to set FLASH latency 4 in power scale 3 */
+#endif
+#if defined(FLASH_SCALE3_LATENCY5_FREQ)
+#define UTILS_SCALE3_LATENCY5_FREQ  FLASH_SCALE3_LATENCY5_FREQ /*!< HCLK frequency to set FLASH latency 5 in power scale 3 */
+#endif
+/**
+  * @}
+  */
+
+/* Private macros ------------------------------------------------------------*/
+/** @addtogroup UTILS_LL_Private_Macros
+  * @{
+  */
+#define IS_LL_UTILS_SYSCLK_DIV(__VALUE__) (((__VALUE__) == LL_RCC_SYSCLK_DIV_1)   \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_2)   \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_4)   \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_8)   \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_16)  \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_64)  \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_128) \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_256) \
+                                        || ((__VALUE__) == LL_RCC_SYSCLK_DIV_512))
+
+#define IS_LL_UTILS_APB1_DIV(__VALUE__) (((__VALUE__) == LL_RCC_APB1_DIV_1) \
+                                      || ((__VALUE__) == LL_RCC_APB1_DIV_2) \
+                                      || ((__VALUE__) == LL_RCC_APB1_DIV_4) \
+                                      || ((__VALUE__) == LL_RCC_APB1_DIV_8) \
+                                      || ((__VALUE__) == LL_RCC_APB1_DIV_16))
+
+#define IS_LL_UTILS_APB2_DIV(__VALUE__) (((__VALUE__) == LL_RCC_APB2_DIV_1) \
+                                      || ((__VALUE__) == LL_RCC_APB2_DIV_2) \
+                                      || ((__VALUE__) == LL_RCC_APB2_DIV_4) \
+                                      || ((__VALUE__) == LL_RCC_APB2_DIV_8) \
+                                      || ((__VALUE__) == LL_RCC_APB2_DIV_16))
+
+#define IS_LL_UTILS_PLLM_VALUE(__VALUE__) (((__VALUE__) == LL_RCC_PLLM_DIV_2)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_3)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_4)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_5)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_6)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_7)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_8)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_9)  \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_10) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_11) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_12) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_13) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_14) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_15) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_16) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_17) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_18) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_19) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_20) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_21) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_22) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_23) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_24) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_25) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_26) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_27) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_28) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_29) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_30) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_31) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_32) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_33) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_34) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_35) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_36) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_37) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_38) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_39) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_40) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_41) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_42) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_43) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_44) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_45) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_46) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_47) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_48) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_49) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_50) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_51) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_52) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_53) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_54) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_55) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_56) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_57) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_58) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_59) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_60) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_61) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_62) \
+                                        || ((__VALUE__) == LL_RCC_PLLM_DIV_63))
+
+#define IS_LL_UTILS_PLLN_VALUE(__VALUE__) ((RCC_PLLN_MIN_VALUE <= (__VALUE__)) && ((__VALUE__) <= RCC_PLLN_MAX_VALUE))
+
+#define IS_LL_UTILS_PLLP_VALUE(__VALUE__) (((__VALUE__) == LL_RCC_PLLP_DIV_2) \
+                                        || ((__VALUE__) == LL_RCC_PLLP_DIV_4) \
+                                        || ((__VALUE__) == LL_RCC_PLLP_DIV_6) \
+                                        || ((__VALUE__) == LL_RCC_PLLP_DIV_8))
+
+#define IS_LL_UTILS_PLLVCO_INPUT(__VALUE__)  ((UTILS_PLLVCO_INPUT_MIN <= (__VALUE__)) && ((__VALUE__) <= UTILS_PLLVCO_INPUT_MAX))
+
+#define IS_LL_UTILS_PLLVCO_OUTPUT(__VALUE__) ((UTILS_PLLVCO_OUTPUT_MIN <= (__VALUE__)) && ((__VALUE__) <= UTILS_PLLVCO_OUTPUT_MAX))
+
+#if !defined(RCC_MAX_FREQUENCY_SCALE1)
+#define IS_LL_UTILS_PLL_FREQUENCY(__VALUE__) ((LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE2) ? ((__VALUE__) <= UTILS_MAX_FREQUENCY_SCALE2) : \
+                                             ((__VALUE__) <= UTILS_MAX_FREQUENCY_SCALE3))
+                                             
+#elif defined(RCC_MAX_FREQUENCY_SCALE3) 
+#define IS_LL_UTILS_PLL_FREQUENCY(__VALUE__) ((LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE1) ? ((__VALUE__) <= UTILS_MAX_FREQUENCY_SCALE1) : \
+                                              (LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE2) ? ((__VALUE__) <= UTILS_MAX_FREQUENCY_SCALE2) : \
+                                              ((__VALUE__) <= UTILS_MAX_FREQUENCY_SCALE3))
+
+#else
+#define IS_LL_UTILS_PLL_FREQUENCY(__VALUE__) ((LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE1) ? ((__VALUE__) <= UTILS_MAX_FREQUENCY_SCALE1) : \
+                                             ((__VALUE__) <= UTILS_MAX_FREQUENCY_SCALE2))
+
+#endif /* RCC_MAX_FREQUENCY_SCALE1*/
+#define IS_LL_UTILS_HSE_BYPASS(__STATE__) (((__STATE__) == LL_UTILS_HSEBYPASS_ON) \
+                                        || ((__STATE__) == LL_UTILS_HSEBYPASS_OFF))
+
+#define IS_LL_UTILS_HSE_FREQUENCY(__FREQUENCY__) (((__FREQUENCY__) >= UTILS_HSE_FREQUENCY_MIN) && ((__FREQUENCY__) <= UTILS_HSE_FREQUENCY_MAX))
+/**
+  * @}
+  */
+/* Private function prototypes -----------------------------------------------*/
+/** @defgroup UTILS_LL_Private_Functions UTILS Private functions
+  * @{
+  */
+static uint32_t    UTILS_GetPLLOutputFrequency(uint32_t PLL_InputFrequency,
+                                               LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct);
+static ErrorStatus UTILS_SetFlashLatency(uint32_t HCLK_Frequency);
+static ErrorStatus UTILS_EnablePLLAndSwitchSystem(uint32_t SYSCLK_Frequency, LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct);
+static ErrorStatus UTILS_PLL_IsBusy(void);
+/**
+  * @}
+  */
+
+/* Exported functions --------------------------------------------------------*/
+/** @addtogroup UTILS_LL_Exported_Functions
+  * @{
+  */
+
+/** @addtogroup UTILS_LL_EF_DELAY
+  * @{
+  */
+
+/**
+  * @brief  This function configures the Cortex-M SysTick source to have 1ms time base.
+  * @note   When a RTOS is used, it is recommended to avoid changing the Systick
+  *         configuration by calling this function, for a delay use rather osDelay RTOS service.
+  * @param  HCLKFrequency HCLK frequency in Hz
+  * @note   HCLK frequency can be calculated thanks to RCC helper macro or function @ref LL_RCC_GetSystemClocksFreq
+  * @retval None
+  */
+void LL_Init1msTick(uint32_t HCLKFrequency)
+{
+  /* Use frequency provided in argument */
+  LL_InitTick(HCLKFrequency, 1000U);
+}
+
+/**
+  * @brief  This function provides accurate delay (in milliseconds) based
+  *         on SysTick counter flag
+  * @note   When a RTOS is used, it is recommended to avoid using blocking delay
+  *         and use rather osDelay service.
+  * @note   To respect 1ms timebase, user should call @ref LL_Init1msTick function which
+  *         will configure Systick to 1ms
+  * @param  Delay specifies the delay time length, in milliseconds.
+  * @retval None
+  */
+void LL_mDelay(uint32_t Delay)
+{
+  __IO uint32_t  tmp = SysTick->CTRL;  /* Clear the COUNTFLAG first */
+  /* Add this code to indicate that local variable is not used */
+  ((void)tmp);
+
+  /* Add a period to guaranty minimum wait */
+  if(Delay < LL_MAX_DELAY)
+  {
+    Delay++;
+  }
+
+  while (Delay)
+  {
+    if((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) != 0U)
+    {
+      Delay--;
+    }
+  }
+}
+
+/**
+  * @}
+  */
+
+/** @addtogroup UTILS_EF_SYSTEM
+  *  @brief    System Configuration functions
+  *
+  @verbatim
+ ===============================================================================
+           ##### System Configuration functions #####
+ ===============================================================================
+    [..]
+         System, AHB and APB buses clocks configuration
+
+         (+) The maximum frequency of the SYSCLK, HCLK, PCLK1 and PCLK2 is 180000000 Hz.
+  @endverbatim
+  @internal
+             Depending on the device voltage range, the maximum frequency should be
+             adapted accordingly to the Refenece manual.
+  @endinternal
+  * @{
+  */
+
+/**
+  * @brief  This function sets directly SystemCoreClock CMSIS variable.
+  * @note   Variable can be calculated also through SystemCoreClockUpdate function.
+  * @param  HCLKFrequency HCLK frequency in Hz (can be calculated thanks to RCC helper macro)
+  * @retval None
+  */
+void LL_SetSystemCoreClock(uint32_t HCLKFrequency)
+{
+  /* HCLK clock frequency */
+  SystemCoreClock = HCLKFrequency;
+}
+
+/**
+  * @brief  This function configures system clock at maximum frequency with HSI as clock source of the PLL
+  * @note   The application need to ensure that PLL is disabled.
+  * @note   Function is based on the following formula:
+  *         - PLL output frequency = (((HSI frequency / PLLM) * PLLN) / PLLP)
+  *         - PLLM: ensure that the VCO input frequency ranges from @ref RCC_PLLVCO_INPUT_MIN to @ref RCC_PLLVCO_INPUT_MAX (PLLVCO_input = HSI frequency / PLLM)
+  *         - PLLN: ensure that the VCO output frequency is between @ref RCC_PLLVCO_OUTPUT_MIN and @ref RCC_PLLVCO_OUTPUT_MAX (PLLVCO_output = PLLVCO_input * PLLN)
+  *         - PLLP: ensure that max frequency at 180000000 Hz is reach (PLLVCO_output / PLLP)
+  * @param  UTILS_PLLInitStruct pointer to a @ref LL_UTILS_PLLInitTypeDef structure that contains
+  *                             the configuration information for the PLL.
+  * @param  UTILS_ClkInitStruct pointer to a @ref LL_UTILS_ClkInitTypeDef structure that contains
+  *                             the configuration information for the BUS prescalers.
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: Max frequency configuration done
+  *          - ERROR: Max frequency configuration not done
+  */
+ErrorStatus LL_PLL_ConfigSystemClock_HSI(LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct,
+                                         LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct)
+{
+  ErrorStatus status = SUCCESS;
+  uint32_t pllfreq = 0U;
+
+  /* Check if one of the PLL is enabled */
+  if(UTILS_PLL_IsBusy() == SUCCESS)
+  {
+    /* Calculate the new PLL output frequency */
+    pllfreq = UTILS_GetPLLOutputFrequency(HSI_VALUE, UTILS_PLLInitStruct);
+
+    /* Enable HSI if not enabled */
+    if(LL_RCC_HSI_IsReady() != 1U)
+    {
+      LL_RCC_HSI_Enable();
+      while (LL_RCC_HSI_IsReady() != 1U)
+      {
+        /* Wait for HSI ready */
+      }
+    }
+
+    /* Configure PLL */
+    LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSI, UTILS_PLLInitStruct->PLLM, UTILS_PLLInitStruct->PLLN,
+                                UTILS_PLLInitStruct->PLLP);
+
+    /* Enable PLL and switch system clock to PLL */
+    status = UTILS_EnablePLLAndSwitchSystem(pllfreq, UTILS_ClkInitStruct);
+  }
+  else
+  {
+    /* Current PLL configuration cannot be modified */
+    status = ERROR;
+  }
+
+  return status;
+}
+
+/**
+  * @brief  This function configures system clock with HSE as clock source of the PLL
+  * @note   The application need to ensure that PLL is disabled.
+  *         - PLL output frequency = (((HSI frequency / PLLM) * PLLN) / PLLP)
+  *         - PLLM: ensure that the VCO input frequency ranges from @ref RCC_PLLVCO_INPUT_MIN to @ref RCC_PLLVCO_INPUT_MAX (PLLVCO_input = HSI frequency / PLLM)
+  *         - PLLN: ensure that the VCO output frequency is between @ref RCC_PLLVCO_OUTPUT_MIN and @ref RCC_PLLVCO_OUTPUT_MAX (PLLVCO_output = PLLVCO_input * PLLN)
+  *         - PLLP: ensure that max frequency at 180000000 Hz is reach (PLLVCO_output / PLLP)
+  * @param  HSEFrequency Value between Min_Data = 4000000 and Max_Data = 26000000
+  * @param  HSEBypass This parameter can be one of the following values:
+  *         @arg @ref LL_UTILS_HSEBYPASS_ON
+  *         @arg @ref LL_UTILS_HSEBYPASS_OFF
+  * @param  UTILS_PLLInitStruct pointer to a @ref LL_UTILS_PLLInitTypeDef structure that contains
+  *                             the configuration information for the PLL.
+  * @param  UTILS_ClkInitStruct pointer to a @ref LL_UTILS_ClkInitTypeDef structure that contains
+  *                             the configuration information for the BUS prescalers.
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: Max frequency configuration done
+  *          - ERROR: Max frequency configuration not done
+  */
+ErrorStatus LL_PLL_ConfigSystemClock_HSE(uint32_t HSEFrequency, uint32_t HSEBypass,
+                                         LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct, LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct)
+{
+  ErrorStatus status = SUCCESS;
+  uint32_t pllfreq = 0U;
+
+  /* Check the parameters */
+  assert_param(IS_LL_UTILS_HSE_FREQUENCY(HSEFrequency));
+  assert_param(IS_LL_UTILS_HSE_BYPASS(HSEBypass));
+
+  /* Check if one of the PLL is enabled */
+  if(UTILS_PLL_IsBusy() == SUCCESS)
+  {
+    /* Calculate the new PLL output frequency */
+    pllfreq = UTILS_GetPLLOutputFrequency(HSEFrequency, UTILS_PLLInitStruct);
+
+    /* Enable HSE if not enabled */
+    if(LL_RCC_HSE_IsReady() != 1U)
+    {
+      /* Check if need to enable HSE bypass feature or not */
+      if(HSEBypass == LL_UTILS_HSEBYPASS_ON)
+      {
+        LL_RCC_HSE_EnableBypass();
+      }
+      else
+      {
+        LL_RCC_HSE_DisableBypass();
+      }
+
+      /* Enable HSE */
+      LL_RCC_HSE_Enable();
+      while (LL_RCC_HSE_IsReady() != 1U)
+      {
+        /* Wait for HSE ready */
+      }
+    }
+
+    /* Configure PLL */
+    LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, UTILS_PLLInitStruct->PLLM, UTILS_PLLInitStruct->PLLN,
+                                UTILS_PLLInitStruct->PLLP);
+
+    /* Enable PLL and switch system clock to PLL */
+    status = UTILS_EnablePLLAndSwitchSystem(pllfreq, UTILS_ClkInitStruct);
+  }
+  else
+  {
+    /* Current PLL configuration cannot be modified */
+    status = ERROR;
+  }
+
+  return status;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/** @addtogroup UTILS_LL_Private_Functions
+  * @{
+  */
+/**
+  * @brief  Update number of Flash wait states in line with new frequency and current
+            voltage range.
+  * @note   This Function support ONLY devices with supply voltage (voltage range) between 2.7V and 3.6V
+  * @param  HCLK_Frequency  HCLK frequency
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: Latency has been modified
+  *          - ERROR: Latency cannot be modified
+  */
+static ErrorStatus UTILS_SetFlashLatency(uint32_t HCLK_Frequency)
+{
+  ErrorStatus status = SUCCESS;
+
+  uint32_t latency = LL_FLASH_LATENCY_0;  /* default value 0WS */
+
+  /* Frequency cannot be equal to 0 */
+  if(HCLK_Frequency == 0U)
+  {
+    status = ERROR;
+  }
+  else
+  {
+    if(LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE1)
+    {
+#if defined (UTILS_SCALE1_LATENCY5_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE1_LATENCY5_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_5;
+      }
+#endif /*UTILS_SCALE1_LATENCY5_FREQ */
+#if defined (UTILS_SCALE1_LATENCY4_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE1_LATENCY4_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_4;
+      }
+#endif /* UTILS_SCALE1_LATENCY4_FREQ */
+#if defined (UTILS_SCALE1_LATENCY3_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE1_LATENCY3_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_3;
+      }
+#endif /* UTILS_SCALE1_LATENCY3_FREQ */
+#if defined (UTILS_SCALE1_LATENCY2_FREQ) 
+      if((HCLK_Frequency > UTILS_SCALE1_LATENCY2_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_2;
+      }
+      else
+      {
+        if((HCLK_Frequency > UTILS_SCALE1_LATENCY1_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+        {
+          latency = LL_FLASH_LATENCY_1;
+        }
+      }
+#endif /* UTILS_SCALE1_LATENCY2_FREQ */
+    }
+    if(LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE2)
+    {
+#if defined (UTILS_SCALE2_LATENCY5_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE2_LATENCY5_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_5;
+      }
+#endif /*UTILS_SCALE1_LATENCY5_FREQ */
+#if defined (UTILS_SCALE2_LATENCY4_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE2_LATENCY4_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_4;
+      }
+#endif /*UTILS_SCALE1_LATENCY4_FREQ */
+#if defined (UTILS_SCALE2_LATENCY3_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE2_LATENCY3_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_3;
+      }
+#endif /*UTILS_SCALE1_LATENCY3_FREQ */
+      if((HCLK_Frequency > UTILS_SCALE2_LATENCY2_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_2;
+      }
+      else
+      {
+        if((HCLK_Frequency > UTILS_SCALE2_LATENCY1_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+        {
+          latency = LL_FLASH_LATENCY_1;
+        }
+      }
+    }
+#if defined (LL_PWR_REGU_VOLTAGE_SCALE3)
+    if(LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE3)
+    {
+#if defined (UTILS_SCALE3_LATENCY3_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE3_LATENCY3_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_3;
+      }
+#endif /*UTILS_SCALE1_LATENCY3_FREQ */
+#if defined (UTILS_SCALE3_LATENCY2_FREQ)
+      if((HCLK_Frequency > UTILS_SCALE3_LATENCY2_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+      {
+        latency = LL_FLASH_LATENCY_2;
+      }
+      else
+      {
+        if((HCLK_Frequency > UTILS_SCALE3_LATENCY1_FREQ)&&(latency == LL_FLASH_LATENCY_0))
+        {
+          latency = LL_FLASH_LATENCY_1;
+        }
+      }
+    }
+#endif /*UTILS_SCALE1_LATENCY2_FREQ */
+#endif /* LL_PWR_REGU_VOLTAGE_SCALE3 */
+
+    LL_FLASH_SetLatency(latency);
+
+    /* Check that the new number of wait states is taken into account to access the Flash
+       memory by reading the FLASH_ACR register */
+    if(LL_FLASH_GetLatency() != latency)
+    {
+      status = ERROR;
+    }
+  }
+  return status;
+}
+
+/**
+  * @brief  Function to check that PLL can be modified
+  * @param  PLL_InputFrequency  PLL input frequency (in Hz)
+  * @param  UTILS_PLLInitStruct pointer to a @ref LL_UTILS_PLLInitTypeDef structure that contains
+  *                             the configuration information for the PLL.
+  * @retval PLL output frequency (in Hz)
+  */
+static uint32_t UTILS_GetPLLOutputFrequency(uint32_t PLL_InputFrequency, LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct)
+{
+  uint32_t pllfreq = 0U;
+
+  /* Check the parameters */
+  assert_param(IS_LL_UTILS_PLLM_VALUE(UTILS_PLLInitStruct->PLLM));
+  assert_param(IS_LL_UTILS_PLLN_VALUE(UTILS_PLLInitStruct->PLLN));
+  assert_param(IS_LL_UTILS_PLLP_VALUE(UTILS_PLLInitStruct->PLLP));
+  
+  /* Check different PLL parameters according to RM                          */
+  /*  - PLLM: ensure that the VCO input frequency ranges from @ref UTILS_PLLVCO_INPUT_MIN to @ref UTILS_PLLVCO_INPUT_MAX MHz.   */
+  pllfreq = PLL_InputFrequency / (UTILS_PLLInitStruct->PLLM & (RCC_PLLCFGR_PLLM >> RCC_PLLCFGR_PLLM_Pos));
+  assert_param(IS_LL_UTILS_PLLVCO_INPUT(pllfreq));
+
+  /*  - PLLN: ensure that the VCO output frequency is between @ref UTILS_PLLVCO_OUTPUT_MIN and @ref UTILS_PLLVCO_OUTPUT_MAX .*/
+  pllfreq = pllfreq * (UTILS_PLLInitStruct->PLLN & (RCC_PLLCFGR_PLLN >> RCC_PLLCFGR_PLLN_Pos));
+  assert_param(IS_LL_UTILS_PLLVCO_OUTPUT(pllfreq));
+  
+  /*  - PLLP: ensure that max frequency at @ref RCC_MAX_FREQUENCY Hz is reached     */
+  pllfreq = pllfreq / (((UTILS_PLLInitStruct->PLLP >> RCC_PLLCFGR_PLLP_Pos) + 1) * 2);
+  assert_param(IS_LL_UTILS_PLL_FREQUENCY(pllfreq));
+
+  return pllfreq;
+}
+
+/**
+  * @brief  Function to check that PLL can be modified
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: PLL modification can be done
+  *          - ERROR: PLL is busy
+  */
+static ErrorStatus UTILS_PLL_IsBusy(void)
+{
+  ErrorStatus status = SUCCESS;
+
+  /* Check if PLL is busy*/
+  if(LL_RCC_PLL_IsReady() != 0U)
+  {
+    /* PLL configuration cannot be modified */
+    status = ERROR;
+  }
+
+#if defined(RCC_PLLSAI_SUPPORT)
+  /* Check if PLLSAI is busy*/
+  if(LL_RCC_PLLSAI_IsReady() != 0U)
+  {
+    /* PLLSAI1 configuration cannot be modified */
+    status = ERROR;
+  }
+#endif /*RCC_PLLSAI_SUPPORT*/
+#if defined(RCC_PLLI2S_SUPPORT)
+  /* Check if PLLI2S is busy*/
+  if(LL_RCC_PLLI2S_IsReady() != 0U)
+  {
+    /* PLLI2S configuration cannot be modified */
+    status = ERROR;
+  }
+#endif /*RCC_PLLI2S_SUPPORT*/
+  return status;
+}
+
+/**
+  * @brief  Function to enable PLL and switch system clock to PLL
+  * @param  SYSCLK_Frequency SYSCLK frequency
+  * @param  UTILS_ClkInitStruct pointer to a @ref LL_UTILS_ClkInitTypeDef structure that contains
+  *                             the configuration information for the BUS prescalers.
+  * @retval An ErrorStatus enumeration value:
+  *          - SUCCESS: No problem to switch system to PLL
+  *          - ERROR: Problem to switch system to PLL
+  */
+static ErrorStatus UTILS_EnablePLLAndSwitchSystem(uint32_t SYSCLK_Frequency, LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct)
+{
+  ErrorStatus status = SUCCESS;
+  uint32_t hclk_frequency = 0U;
+
+  assert_param(IS_LL_UTILS_SYSCLK_DIV(UTILS_ClkInitStruct->AHBCLKDivider));
+  assert_param(IS_LL_UTILS_APB1_DIV(UTILS_ClkInitStruct->APB1CLKDivider));
+  assert_param(IS_LL_UTILS_APB2_DIV(UTILS_ClkInitStruct->APB2CLKDivider));
+
+  /* Calculate HCLK frequency */
+  hclk_frequency = __LL_RCC_CALC_HCLK_FREQ(SYSCLK_Frequency, UTILS_ClkInitStruct->AHBCLKDivider);
+
+  /* Increasing the number of wait states because of higher CPU frequency */
+  if(SystemCoreClock < hclk_frequency)
+  {
+    /* Set FLASH latency to highest latency */
+    status = UTILS_SetFlashLatency(hclk_frequency);
+  }
+
+  /* Update system clock configuration */
+  if(status == SUCCESS)
+  {
+    /* Enable PLL */
+    LL_RCC_PLL_Enable();
+    while (LL_RCC_PLL_IsReady() != 1U)
+    {
+      /* Wait for PLL ready */
+    }
+
+    /* Sysclk activation on the main PLL */
+    LL_RCC_SetAHBPrescaler(UTILS_ClkInitStruct->AHBCLKDivider);
+    LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
+    while (LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
+    {
+      /* Wait for system clock switch to PLL */
+    }
+
+    /* Set APB1 & APB2 prescaler*/
+    LL_RCC_SetAPB1Prescaler(UTILS_ClkInitStruct->APB1CLKDivider);
+    LL_RCC_SetAPB2Prescaler(UTILS_ClkInitStruct->APB2CLKDivider);
+  }
+    
+  /* Decreasing the number of wait states because of lower CPU frequency */
+  if(SystemCoreClock > hclk_frequency)
+  {
+    /* Set FLASH latency to lowest latency */
+    status = UTILS_SetFlashLatency(hclk_frequency);
+  }
+
+  /* Update SystemCoreClock variable */
+  if(status == SUCCESS)
+  {
+    LL_SetSystemCoreClock(hclk_frequency);
+  }
+
+  return status;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/