text: /**
    ******************************************************************************
    * @file    system_stm32g4xx.h
    * @author  MCD Application Team
    * @brief   CMSIS Cortex-M4 Device System Source File for STM32G4xx devices.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; Copyright (c) 2019 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
    *
    ******************************************************************************
    */
  
  /** @addtogroup CMSIS
    * @{
    */
  
  /** @addtogroup stm32g4xx_system
    * @{
    */
  
  /**
    * @brief Define to prevent recursive inclusion
    */
  #ifndef __SYSTEM_STM32G4XX_H
  #define __SYSTEM_STM32G4XX_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /** @addtogroup STM32G4xx_System_Includes
    * @{
    */
  
  /**
    * @}
    */
  
  
  /** @addtogroup STM32G4xx_System_Exported_Variables
    * @{
    */
    /* The SystemCoreClock variable is updated in three ways:
        1) by calling CMSIS function SystemCoreClockUpdate()
        2) by calling HAL API function HAL_RCC_GetSysClockFreq()
        3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
           Note: If you use this function to configure the system clock; then there
                 is no need to call the 2 first functions listed above, since SystemCoreClock
                 variable is updated automatically.
    */
  extern uint32_t SystemCoreClock;            /*!< System Clock Frequency (Core Clock) */
  
  extern const uint8_t  AHBPrescTable[16];    /*!< AHB prescalers table values */
  extern const uint8_t  APBPrescTable[8];     /*!< APB prescalers table values */
  
  /**
    * @}
    */
  
  /** @addtogroup STM32G4xx_System_Exported_Constants
    * @{
    */
  
  /**
    * @}
    */
  
  /** @addtogroup STM32G4xx_System_Exported_Macros
    * @{
    */
  
  /**
    * @}
    */
  
  /** @addtogroup STM32G4xx_System_Exported_Functions
    * @{
    */
  
  extern void SystemInit(void);
  extern void SystemCoreClockUpdate(void);
  /**
    * @}
    */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /*__SYSTEM_STM32G4XX_H */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  