Google Git
Sign in
pigweed / third_party / github / STMicroelectronics / stm32f4xx_hal_driver / f2aeb9ebc325f19912c1dd2c84fd36a8335c1bff / . / Src / stm32f4xx_ll_utils.c
blob: ef05cfdffe0239ff5f9ab9826d6c84aef4bd3d49 [file] [log] [blame]
/**
******************************************************************************
* @file stm32f4xx_ll_utils.c
* @author MCD Application Team
* @brief UTILS LL module driver.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* 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****/