/**
******************************************************************************
* @file stm32wlxx_ll_utils.c
* @author MCD Application Team
* @brief UTILS LL module driver.
******************************************************************************
* @attention
*
* Copyright (c) 2020 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32wlxx_ll_utils.h"
#include "stm32wlxx_ll_rcc.h"
#include "stm32wlxx_ll_system.h"
#include "stm32wlxx_ll_pwr.h"
#ifdef USE_FULL_ASSERT
#include "stm32_assert.h"
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
/** @addtogroup STM32WLxx_LL_Driver
* @{
*/
/** @addtogroup UTILS_LL
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/** @addtogroup UTILS_LL_Private_Constants
* @{
*/
#define UTILS_MAX_FREQUENCY_SCALE1 48000000U /*!< Maximum frequency for system clock at power scale1, in Hz */
#define UTILS_MAX_FREQUENCY_SCALE2 16000000U /*!< Maximum frequency for system clock at power scale2, in Hz */
/* Defines used for PLL range */
#define UTILS_PLLVCO_INPUT_MIN 2660000U /*!< Frequency min for PLLVCO input, in Hz */
#define UTILS_PLLVCO_INPUT_MAX 16000000U /*!< Frequency max for PLLVCO input, in Hz */
#define UTILS_PLLVCO_OUTPUT_MIN 96000000U /*!< Frequency min for PLLVCO output, in Hz */
#define UTILS_PLLVCO_OUTPUT_MAX 344000000U /*!< Frequency max for PLLVCO output, in Hz */
/* Defines used for HCLK2 frequency check */
#define UTILS_HCLK2_MAX 48000000U /*!< HCLK2 frequency maximum at 48MHz */
/**
* @}
*/
/* 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_3) \
|| ((__VALUE__) == LL_RCC_SYSCLK_DIV_4) \
|| ((__VALUE__) == LL_RCC_SYSCLK_DIV_5) \
|| ((__VALUE__) == LL_RCC_SYSCLK_DIV_6) \
|| ((__VALUE__) == LL_RCC_SYSCLK_DIV_8) \
|| ((__VALUE__) == LL_RCC_SYSCLK_DIV_10) \
|| ((__VALUE__) == LL_RCC_SYSCLK_DIV_16) \
|| ((__VALUE__) == LL_RCC_SYSCLK_DIV_32) \
|| ((__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_1) \
|| ((__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))
#define IS_LL_UTILS_PLLN_VALUE(__VALUE__) ((6U <= (__VALUE__)) && ((__VALUE__) <= 127U))
#define IS_LL_UTILS_PLLR_VALUE(__VALUE__) (((__VALUE__) == LL_RCC_PLLR_DIV_2) \
|| ((__VALUE__) == LL_RCC_PLLR_DIV_3) \
|| ((__VALUE__) == LL_RCC_PLLR_DIV_4) \
|| ((__VALUE__) == LL_RCC_PLLR_DIV_5) \
|| ((__VALUE__) == LL_RCC_PLLR_DIV_6) \
|| ((__VALUE__) == LL_RCC_PLLR_DIV_7) \
|| ((__VALUE__) == LL_RCC_PLLR_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))
#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))
#define COUNTOF(a) (sizeof(a) / sizeof(*(a)))
/**
* @}
*/
/* 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_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
* @{
*/
#if defined(CORE_CM0PLUS)
/**
* @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
* (HCLK2_Frequency field)
* @retval None
*/
#else
/**
* @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
* (HCLK1_Frequency field)
* @retval None
*/
#endif /* CORE_CM0PLUS */
void LL_Init1msTick(uint32_t HCLKFrequency)
{
/* Use frequency provided in argument */
LL_InitTick(HCLKFrequency, 1000);
}
/**
* @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 */
uint32_t tmpDelay;
/* Add this code to indicate that local variable is not used */
((void)tmp);
tmpDelay = Delay;
/* Add a period to guaranty minimum wait */
if (tmpDelay < LL_MAX_DELAY)
{
tmpDelay ++;
}
while (tmpDelay != 0U)
{
if ((SysTick->CTRL & SysTick_CTRL_COUNTFLAG_Msk) != 0U)
{
tmpDelay --;
}
}
}
/**
* @}
*/
/** @addtogroup UTILS_EF_SYSTEM
* @brief System Configuration functions
*
@verbatim
===============================================================================
##### System Configuration functions #####
===============================================================================
[..]
System, HCLK1, HCLK2, HCLK3 and APB buses clocks configuration
(+) The maximum frequency of the SYSCLK, HCLK1, HCLK3, PCLK1 and PCLK2
is 480000000 Hz.
@endverbatim
@internal
Depending on the device voltage range, the maximum frequency should be
adapted accordingly:
(++) HCLK3 clock frequency for STM32WL55xx device
(++) +--------------------------------------------------------+
(++) | Latency | HCLK3 clock frequency (MHz) |
(++) | |--------------------------------------|
(++) | | voltage range 1 | voltage range 2 |
(++) | | 1.2 V | 1.0 V |
(++) |-----------------|-------------------|------------------|
(++) |0WS(1 CPU cycles)| 0 < HCLK3 <= 18 | 0 < HCLK3 <= 6 |
(++) |-----------------|-------------------|------------------|
(++) |1WS(2 CPU cycles)| 18 < HCLK3 <= 36 | 6 < HCLK3 <= 12 |
(++) |-----------------|-------------------|------------------|
(++) |2WS(3 CPU cycles)| 36 < HCLK3 <= 48 | 12 < HCLK3 <= 16|
(++) +--------------------------------------------------------+
@endinternal
* @{
*/
#if defined(CORE_CM0PLUS)
/**
* @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 or function
@ref LL_RCC_GetSystemClocksFreq (HCLK2_Frequency field))
* @retval None
*/
#else
/**
* @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 or function
@ref LL_RCC_GetSystemClocksFreq (HCLK1_Frequency field))
* @retval None
*/
#endif /* CORE_CM0PLUS */
void LL_SetSystemCoreClock(uint32_t HCLKFrequency)
{
/* HCLK clock frequency */
SystemCoreClock = HCLKFrequency;
}
/**
* @brief Update number of Flash wait states in line with new frequency and current
voltage range.
* @param HCLK3_Frequency HCLK3 frequency
* @retval An ErrorStatus enumeration value:
* - SUCCESS: Latency has been modified
* - ERROR: Latency cannot be modified
*/
ErrorStatus LL_SetFlashLatency(uint32_t HCLK3_Frequency)
{
uint32_t timeout;
uint32_t getlatency;
uint32_t latency;
uint8_t index;
ErrorStatus status = ERROR;
/* Array used for FLASH latency according to HCLK3 Frequency */
/* Flash Clock source (HCLK3) range in MHz with a VCORE is range1 */
const uint32_t UTILS_CLK_SRC_RANGE_VOS1[] = {18000000UL, 36000000UL, UTILS_MAX_FREQUENCY_SCALE1};
/* Flash Clock source (HCLK3) range in MHz with a VCORE is range2 */
const uint32_t UTILS_CLK_SRC_RANGE_VOS2[] = {6000000U, 12000000U, UTILS_MAX_FREQUENCY_SCALE2};
/* Flash Latency range */
const uint32_t UTILS_LATENCY_RANGE[] = {LL_FLASH_LATENCY_0, LL_FLASH_LATENCY_1, LL_FLASH_LATENCY_2};
/* Frequency cannot be equal to 0 */
if (HCLK3_Frequency != 0U)
{
if (LL_PWR_GetRegulVoltageScaling() == LL_PWR_REGU_VOLTAGE_SCALE1)
{
/* Frequency cannot be greater than a defined max clock */
if (HCLK3_Frequency <= UTILS_MAX_FREQUENCY_SCALE1)
{
for (index = 0; index < COUNTOF(UTILS_CLK_SRC_RANGE_VOS1); index++)
{
if (HCLK3_Frequency <= UTILS_CLK_SRC_RANGE_VOS1[index])
{
latency = UTILS_LATENCY_RANGE[index];
status = SUCCESS;
break;
}
}
}
}
else /* SCALE2 */
{
/* Frequency cannot be greater than a defined max clock */
if (HCLK3_Frequency <= UTILS_MAX_FREQUENCY_SCALE2)
{
for (index = 0; index < COUNTOF(UTILS_CLK_SRC_RANGE_VOS2); index++)
{
if (HCLK3_Frequency <= UTILS_CLK_SRC_RANGE_VOS2[index])
{
latency = UTILS_LATENCY_RANGE[index];
status = SUCCESS;
break;
}
}
}
}
if (status != ERROR)
{
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 */
timeout = 2U;
do
{
/* Wait for Flash latency to be updated */
getlatency = LL_FLASH_GetLatency();
timeout--;
} while ((getlatency != latency) && (timeout > 0U));
if (getlatency != latency)
{
status = ERROR;
}
}
}
return status;
}
/**
* @brief This function configures system clock with MSI as clock source of the PLL
* @note The application needs to ensure that PLL configuration is valid
* @note The application needs to ensure that MSI range is valid.
* @note The application needs to ensure that BUS prescalers are valid
* @note Function is based on the following formula:
* - PLL output frequency = (((MSI frequency / PLLM) * PLLN) / PLLR)
* - PLLM: ensure that the VCO input frequency ranges from 2.66 to 16 MHz (PLLVCO_input = MSI frequency / PLLM)
* - PLLN: ensure that the VCO output frequency is between 96 and 344 MHz (PLLVCO_output = PLLVCO_input * PLLN)
* - PLLR: ensure that max frequency at 48000000 Hz is reached (PLLVCO_output / PLLR)
* @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_MSI(LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct,
LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct)
{
ErrorStatus status = SUCCESS;
uint32_t pllrfreq = 0;
uint32_t range_sel;
uint32_t msi_range;
#if defined(DUAL_CORE)
uint32_t hclk2freq;
#endif /* DUAL_CORE */
/* Check if one of the PLL is enabled */
if (UTILS_PLL_IsBusy() == SUCCESS)
{
/* Get the current MSI range */
if (LL_RCC_MSI_IsEnabledRangeSelect() == 1U)
{
range_sel = LL_RCC_MSIRANGESEL_RUN;
msi_range = LL_RCC_MSI_GetRange();
switch (msi_range)
{
case LL_RCC_MSIRANGE_0: /* MSI = 100 KHz */
case LL_RCC_MSIRANGE_1: /* MSI = 200 KHz */
case LL_RCC_MSIRANGE_2: /* MSI = 400 KHz */
case LL_RCC_MSIRANGE_3: /* MSI = 800 KHz */
case LL_RCC_MSIRANGE_4: /* MSI = 1 MHz */
case LL_RCC_MSIRANGE_5: /* MSI = 2 MHz */
/* PLLVCO input frequency is not in the range from 2.66 to 16 MHz*/
status = ERROR;
break;
case LL_RCC_MSIRANGE_6: /* MSI = 4 MHz */
case LL_RCC_MSIRANGE_7: /* MSI = 8 MHz */
case LL_RCC_MSIRANGE_8: /* MSI = 16 MHz */
case LL_RCC_MSIRANGE_9: /* MSI = 24 MHz */
case LL_RCC_MSIRANGE_10: /* MSI = 32 MHz */
case LL_RCC_MSIRANGE_11: /* MSI = 48 MHz */
default:
break;
}
}
else
{
range_sel = LL_RCC_MSIRANGESEL_STANDBY;
msi_range = LL_RCC_MSI_GetRangeAfterStandby();
switch (msi_range)
{
case LL_RCC_MSISRANGE_4: /* MSI = 1 MHz */
case LL_RCC_MSISRANGE_5: /* MSI = 2 MHz */
/* PLLVCO input frequency is not in the range from 2.66 to 16 MHz*/
status = ERROR;
break;
case LL_RCC_MSISRANGE_7: /* MSI = 8 MHz */
case LL_RCC_MSISRANGE_6: /* MSI = 4 MHz */
default:
break;
}
}
/* Calculate PLL output frequency */
if (status != ERROR)
{
/* Calculate the new PLL output frequency & verify all PLL stages are correct (VCO input ranges,
VCO output ranges & SYSCLK max) when assert activated */
pllrfreq = UTILS_GetPLLOutputFrequency(__LL_RCC_CALC_MSI_FREQ(range_sel, msi_range),
UTILS_PLLInitStruct);
#if defined(DUAL_CORE)
/* Check HCLK2 frequency coherency */
hclk2freq = __LL_RCC_CALC_HCLK2_FREQ(pllrfreq, UTILS_ClkInitStruct->CPU2CLKDivider);
if (hclk2freq > UTILS_HCLK2_MAX)
{
/* HCLK2 frequency can not be higher than 48 Mhz */
status = ERROR;
}
#endif /* DUAL_CORE */
}
/* Main PLL configuration and activation */
if (status != ERROR)
{
/* Enable MSI if not enabled */
if (LL_RCC_MSI_IsReady() != 1U)
{
LL_RCC_MSI_Enable();
while ((LL_RCC_MSI_IsReady() != 1U))
{
/* Wait for MSI ready */
}
}
/* Configure PLL domain SYS */
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_MSI, UTILS_PLLInitStruct->PLLM, UTILS_PLLInitStruct->PLLN,
UTILS_PLLInitStruct->PLLR);
/* Enable PLL and switch system clock to PLL - latency check done internally */
status = UTILS_EnablePLLAndSwitchSystem(pllrfreq, UTILS_ClkInitStruct);
}
}
else
{
/* Current PLL configuration cannot be modified */
status = ERROR;
}
return status;
}
/**
* @brief This function configures system clock at maximum frequency with HSI as clock source of the PLL
* @note The application needs to ensure that PLL configuration is valid
* @note The application needs to ensure that BUS prescalers are valid
* @note Function is based on the following formula:
* - PLL output frequency = (((HSI frequency / PLLM) * PLLN) / PLLR)
* - PLLM: ensure that the VCO input frequency ranges from 2.66 to 16 MHz (PLLVCO_input = HSI frequency / PLLM)
* - PLLN: ensure that the VCO output frequency is between 96 and 344 MHz (PLLVCO_output = PLLVCO_input * PLLN)
* - PLLR: ensure that max frequency at 48000000 Hz is reach (PLLVCO_output / PLLR)
* @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 pllrfreq;
#if defined(DUAL_CORE)
uint32_t hclk2freq;
#endif /* DUAL_CORE */
/* Check if one of the PLL is enabled */
if (UTILS_PLL_IsBusy() == SUCCESS)
{
/* Calculate the new PLL output frequency */
pllrfreq = UTILS_GetPLLOutputFrequency(HSI_VALUE, UTILS_PLLInitStruct);
#if defined(DUAL_CORE)
hclk2freq = __LL_RCC_CALC_HCLK2_FREQ(pllrfreq, UTILS_ClkInitStruct->CPU2CLKDivider);
/* Check HCLK2 frequency coherency */
if (hclk2freq > UTILS_HCLK2_MAX)
{
/* HCLK2 frequency can not be higher than 48 Mhz */
status = ERROR;
}
#endif /* DUAL_CORE */
if (status != ERROR)
{
/* 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->PLLR);
/* Enable PLL and switch system clock to PLL */
status = UTILS_EnablePLLAndSwitchSystem(pllrfreq, 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 needs to ensure that PLL configuration is valid
* @note The application needs to ensure that BUS prescalers are valid
* @note Function is based on the following formula:
* - PLL output frequency = (((HSE frequency / PLLM) * PLLN) / PLLR)
* - PLLM: ensure that the VCO input frequency ranges from 2.66 to 16 MHz (PLLVCO_input = HSE frequency / PLLM)
* - PLLN: ensure that the VCO output frequency is between 96 and 344 MHz (PLLVCO_output = PLLVCO_input * PLLN)
* - PLLR: ensure that max frequency at 48000000 Hz is reached (PLLVCO_output / PLLR)
* @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(LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct,
LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct)
{
ErrorStatus status = SUCCESS;
uint32_t pllrfreq;
#if defined(DUAL_CORE)
uint32_t hclk2freq;
#endif /* DUAL_CORE */
/* Check if one of the PLL is enabled */
if (UTILS_PLL_IsBusy() == SUCCESS)
{
/* Calculate the new PLL output frequency */
if (LL_RCC_HSE_IsEnabledDiv2() != 1UL)
{
pllrfreq = UTILS_GetPLLOutputFrequency(HSE_VALUE, UTILS_PLLInitStruct);
}
else
{
/* HSE Pre is set */
pllrfreq = UTILS_GetPLLOutputFrequency(HSE_VALUE/2UL, UTILS_PLLInitStruct);
}
#if defined(DUAL_CORE)
hclk2freq = __LL_RCC_CALC_HCLK2_FREQ(pllrfreq, UTILS_ClkInitStruct->CPU2CLKDivider);
/* Check HCLK2 frequency coherency */
if (hclk2freq > UTILS_HCLK2_MAX)
{
/* HCLK2 frequency can not be higher than 48 Mhz */
status = ERROR;
}
#endif /* DUAL_CORE */
if (status != ERROR)
{
/* Enable HSE if not enabled */
if (LL_RCC_HSE_IsReady() != 1U)
{
/* 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->PLLR);
/* Enable PLL and switch system clock to PLL */
status = UTILS_EnablePLLAndSwitchSystem(pllrfreq, UTILS_ClkInitStruct);
}
}
else
{
/* Current PLL configuration cannot be modified */
status = ERROR;
}
return status;
}
/**
* @}
*/
/**
* @}
*/
/** @addtogroup UTILS_LL_Private_Functions
* @{
*/
/**
* @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;
/* 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_PLLR_VALUE(UTILS_PLLInitStruct->PLLR));
/* Check different PLL parameters according to RM */
/* - PLLM: ensure that the VCO input frequency ranges from 2.66 to 16 MHz. */
pllfreq = PLL_InputFrequency / (((UTILS_PLLInitStruct->PLLM >> RCC_PLLCFGR_PLLM_Pos) + 1U));
assert_param(IS_LL_UTILS_PLLVCO_INPUT(pllfreq));
/* - PLLN: ensure that the VCO output frequency is between 96 and 344 MHz.*/
pllfreq = pllfreq * (UTILS_PLLInitStruct->PLLN & (RCC_PLLCFGR_PLLN >> RCC_PLLCFGR_PLLN_Pos));
assert_param(IS_LL_UTILS_PLLVCO_OUTPUT(pllfreq));
/* - PLLR: ensure that max frequency at 48000000 Hz is reached */
pllfreq = pllfreq / ((UTILS_PLLInitStruct->PLLR >> RCC_PLLCFGR_PLLR_Pos) + 1U);
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;
}
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 hclks_frequency_target;
uint32_t hclks_frequency_current;
uint32_t sysclk_current;
assert_param(IS_LL_UTILS_SYSCLK_DIV(UTILS_ClkInitStruct->CPU1CLKDivider));
#if defined(DUAL_CORE)
assert_param(IS_LL_UTILS_SYSCLK_DIV(UTILS_ClkInitStruct->CPU2CLKDivider));
#endif /* DUAL_CORE */
assert_param(IS_LL_UTILS_SYSCLK_DIV(UTILS_ClkInitStruct->AHB3CLKDivider));
assert_param(IS_LL_UTILS_APB1_DIV(UTILS_ClkInitStruct->APB1CLKDivider));
assert_param(IS_LL_UTILS_APB2_DIV(UTILS_ClkInitStruct->APB2CLKDivider));
/* Calculate HCLK3 frequency based on SYSCLK_Frequency target */
hclks_frequency_target = __LL_RCC_CALC_HCLK3_FREQ(SYSCLK_Frequency, UTILS_ClkInitStruct->AHB3CLKDivider);
/* Calculate HCLK3 frequency current */
sysclk_current = (SystemCoreClock * AHBPrescTable[(LL_RCC_GetAHBPrescaler() & RCC_CFGR_HPRE) >> RCC_CFGR_HPRE_Pos]);
hclks_frequency_current = __LL_RCC_CALC_HCLK3_FREQ(sysclk_current, LL_RCC_GetAHB3Prescaler());
/* Increasing the number of wait states because of higher CPU frequency */
if (hclks_frequency_current < hclks_frequency_target)
{
/* Set FLASH latency to highest latency */
status = LL_SetFlashLatency(hclks_frequency_target);
}
/* Update system clock configuration */
if (status == SUCCESS)
{
/* Enable PLL */
LL_RCC_PLL_Enable();
LL_RCC_PLL_EnableDomain_SYS();
while (LL_RCC_PLL_IsReady() != 1U)
{
/* Wait for PLL ready */
}
/* Sysclk activation on the main PLL */
LL_RCC_SetAHBPrescaler(UTILS_ClkInitStruct->CPU1CLKDivider);
#if defined(DUAL_CORE)
LL_C2_RCC_SetAHBPrescaler(UTILS_ClkInitStruct->CPU2CLKDivider);
#endif /* DUAL_CORE */
LL_RCC_SetAHB3Prescaler(UTILS_ClkInitStruct->AHB3CLKDivider);
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 (hclks_frequency_current > hclks_frequency_target)
{
/* Set FLASH latency to lowest latency */
status = LL_SetFlashLatency(hclks_frequency_target);
}
/* Update SystemCoreClock variable */
if (status == SUCCESS)
{
#if defined(CORE_CM0PLUS) && defined(DUAL_CORE)
LL_SetSystemCoreClock(__LL_RCC_CALC_HCLK2_FREQ(SYSCLK_Frequency, UTILS_ClkInitStruct->CPU2CLKDivider));
#else
LL_SetSystemCoreClock(__LL_RCC_CALC_HCLK1_FREQ(SYSCLK_Frequency, UTILS_ClkInitStruct->CPU1CLKDivider));
#endif /* CORE_CM0PLUS && DUAL_CORE */
}
return status;
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/