110 lines
2.6 KiB
C
Executable File
110 lines
2.6 KiB
C
Executable File
/**
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******************************************************************************
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* @file system_stm32u5xx.h
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* @author MCD Application Team
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* @brief CMSIS Cortex-M33 Device System Source File for STM32U5xx devices.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2021 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/** @addtogroup CMSIS
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* @{
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*/
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/** @addtogroup stm32u5xx_system
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* @{
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*/
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#ifndef SYSTEM_STM32U5XX_H
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#define SYSTEM_STM32U5XX_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @addtogroup STM32U5xx_System_Includes
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* @{
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*/
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/**
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* @}
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*/
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/** @addtogroup STM32U5xx_System_Exported_Variables
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* @{
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*/
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/* The SystemCoreClock variable is updated in three ways:
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1) by calling CMSIS function SystemCoreClockUpdate()
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2) by calling HAL API function HAL_RCC_GetSysClockFreq()
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3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
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Note: If you use this function to configure the system clock; then there
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is no need to call the 2 first functions listed above, since SystemCoreClock
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variable is updated automatically.
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*/
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extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */
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extern const uint8_t AHBPrescTable[16]; /*!< AHB prescalers table values */
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extern const uint8_t APBPrescTable[8]; /*!< APB prescalers table values */
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extern const uint32_t MSIRangeTable[16]; /*!< MSI ranges table values */
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/**
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* @}
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*/
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/** @addtogroup STM32U5xx_System_Exported_Functions
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* @{
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*/
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/**
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* @brief Setup the microcontroller system.
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*
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* Initialize the System and update the SystemCoreClock variable.
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*/
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extern void SystemInit (void);
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/**
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* @brief Update SystemCoreClock variable.
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*
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* Updates the SystemCoreClock with current core Clock retrieved from cpu registers.
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*/
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extern void SystemCoreClockUpdate (void);
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/**
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* @brief Update SystemCoreClock variable from secure application and return its value
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* when security is implemented in the system (Non-secure callable function).
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*
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* Returns the SystemCoreClock value with current core Clock retrieved from cpu registers.
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*/
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extern uint32_t SECURE_SystemCoreClockUpdate(void);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* SYSTEM_STM32U5XX_H */
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/**
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* @}
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*/
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/**
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* @}
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*/
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