628 lines
28 KiB
C
628 lines
28 KiB
C
/**
|
|
******************************************************************************
|
|
* @file stm32f2xx_ll_utils.c
|
|
* @author MCD Application Team
|
|
* @brief UTILS LL module driver.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© 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 "stm32f2xx_ll_utils.h"
|
|
#include "stm32f2xx_ll_rcc.h"
|
|
#include "stm32f2xx_ll_system.h"
|
|
#ifdef USE_FULL_ASSERT
|
|
#include "stm32_assert.h"
|
|
#else
|
|
#define assert_param(expr) ((void)0U)
|
|
#endif /* USE_FULL_ASSERT */
|
|
|
|
/** @addtogroup STM32F2xx_LL_Driver
|
|
* @{
|
|
*/
|
|
|
|
/** @addtogroup UTILS_LL
|
|
* @{
|
|
*/
|
|
|
|
/* Private types -------------------------------------------------------------*/
|
|
/* Private variables ---------------------------------------------------------*/
|
|
/* Private constants ---------------------------------------------------------*/
|
|
/** @addtogroup UTILS_LL_Private_Constants
|
|
* @{
|
|
*/
|
|
#define UTILS_MAX_FREQUENCY 120000000U /*!< Maximum frequency for system clock, in Hz */
|
|
|
|
/* Defines used for PLL range */
|
|
#define UTILS_PLLVCO_INPUT_MIN 950000U /*!< Frequency min for PLLVCO input, in Hz */
|
|
#define UTILS_PLLVCO_INPUT_MAX 2100000U /*!< Frequency max for PLLVCO input, in Hz */
|
|
#define UTILS_PLLVCO_OUTPUT_MIN 192000000U /*!< Frequency min for PLLVCO output, in Hz */
|
|
#define UTILS_PLLVCO_OUTPUT_MAX 432000000U /*!< 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 */
|
|
#define UTILS_LATENCY1_FREQ 30000000U /*!< HCLK frequency to set FLASH latency 1 in power scale 1 */
|
|
#define UTILS_LATENCY2_FREQ 60000000U /*!< HCLK frequency to set FLASH latency 2 in power scale 1 */
|
|
#define UTILS_LATENCY3_FREQ 90000000U /*!< HCLK frequency to set FLASH latency 3 in power scale 1 */
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* 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__) ((192 <= (__VALUE__)) && ((__VALUE__) <= 432))
|
|
|
|
#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))
|
|
|
|
#define IS_LL_UTILS_PLL_FREQUENCY(__VALUE__) ((__VALUE__) <= UTILS_MAX_FREQUENCY)
|
|
|
|
#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 120000000 Hz.
|
|
@endverbatim
|
|
@internal
|
|
Depending on the device voltage range, the maximum frequency should be
|
|
adapted accordingly:
|
|
|
|
(++) Table 1. HCLK clock frequency.
|
|
(++) +------------------------------------------------------------------------------------------------+
|
|
(++) | Wait states | HCLK clock frequency (MHz) |
|
|
(++) | |-------------------------------------------------------------------------------|
|
|
(++) | (Latency) | voltage range | voltage range | voltage range | voltage range |
|
|
(++) | | 2.7V - 3.6V | 2.4V - 2.7V | 2.1V - 2.4V | 1.8V - 2.1V |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |0WS(1CPU cycle) | 0 < HCLK <= 30 | 0 < HCLK <= 24 | 0 < HCLK <= 18 | 0 < HCLK <= 16 |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |1WS(2CPU cycle) | 30 < HCLK <= 60 | 24 < HCLK <= 48 | 18 < HCLK <= 36 | 16 < HCLK <= 32 |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |2WS(3CPU cycle) | 60 < HCLK <= 90 | 48 < HCLK <= 72 | 36 < HCLK <= 54 | 32 < HCLK <= 48 |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |3WS(4CPU cycle) | 90 < HCLK <= 120 | 72 < HCLK <= 96 | 54 < HCLK <= 72 | 48 < HCLK <= 64 |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |4WS(5CPU cycle) | | 96 < HCLK <= 120 | 72 < HCLK <= 90 | 64 < HCLK <= 80 |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |5WS(6CPU cycle) | | | 90 < HCLK <= 108 | 80 < HCLK <= 96 |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |6WS(7CPU cycle) | | | 108 < HCLK <= 120 | 96 < HCLK <= 112 |
|
|
(++) |----------------|-------------------|-------------------|-------------------|-------------------|
|
|
(++) |7WS(8CPU cycle) | | | | 112 < HCLK <= 120 |
|
|
(++) +------------------------------------------------------------------------------------------------+
|
|
@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 0.95 to 2.10 MHz (PLLVCO_input = HSI frequency / PLLM)
|
|
* - PLLN: ensure that the VCO output frequency is between 192 and 432 MHz (PLLVCO_output = PLLVCO_input * PLLN)
|
|
* - PLLP: ensure that max frequency at 120000000 Hz is reached (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.
|
|
* @note Function is based on the following formula:
|
|
* - PLL output frequency = (((HSE frequency / PLLM) * PLLN) / PLLP)
|
|
* - PLLM: ensure that the VCO input frequency ranges from 0.95 to 2.10 MHz (PLLVCO_input = HSE frequency / PLLM)
|
|
* - PLLN: ensure that the VCO output frequency is between 192 and 432 MHz (PLLVCO_output = PLLVCO_input * PLLN)
|
|
* - PLLP: ensure that max frequency at 120000000 Hz is reached (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.
|
|
* @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(HCLK_Frequency > UTILS_LATENCY3_FREQ)
|
|
{
|
|
/* 90 < HCLK <= 120 => 3WS (4 CPU cycles) */
|
|
latency = LL_FLASH_LATENCY_3;
|
|
}
|
|
else if(HCLK_Frequency > UTILS_LATENCY2_FREQ)
|
|
{
|
|
/* 60 < HCLK <= 90 => 2WS (3 CPU cycles) */
|
|
latency = LL_FLASH_LATENCY_2;
|
|
}
|
|
else
|
|
{
|
|
if(HCLK_Frequency > UTILS_LATENCY1_FREQ)
|
|
{
|
|
/* 30 < HCLK <= 60 => 1WS (2 CPU cycles) */
|
|
latency = LL_FLASH_LATENCY_1;
|
|
}
|
|
/* else HCLK_Frequency < 30MHz default LL_FLASH_LATENCY_0 0WS */
|
|
}
|
|
|
|
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 0.95 to 2.1 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 192 and 432 MHz.*/
|
|
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 120000000 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;
|
|
}
|
|
|
|
/* Check if PLLI2S is busy*/
|
|
if(LL_RCC_PLLI2S_IsReady() != 0U)
|
|
{
|
|
/* PLLI2S 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 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****/
|