Thomas Lyp
Initial commit
Diff: mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/device/stm32f4xx_ll_utils.c
- Revision:
- 0:bb348c97df44
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-dev-master/targets/TARGET_STM/TARGET_STM32F4/device/stm32f4xx_ll_utils.c Wed Sep 16 01:11:49 2020 +0000
@@ -0,0 +1,751 @@
+/**
+ ******************************************************************************
+ * @file stm32f4xx_ll_utils.c
+ * @author MCD Application Team
+ * @brief UTILS LL module driver.
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© 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"
+
+/** @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****/