lib/main/STM32G4/Drivers/CMSIS/Device/ST/STM32G4xx/Include/system_stm32g4xx.h

   1 /**
   2   ******************************************************************************
   3   * @file    system_stm32g4xx.h
   4   * @author  MCD Application Team
   5   * @brief   CMSIS Cortex-M4 Device System Source File for STM32G4xx devices.
   6   ******************************************************************************
   7   * @attention
   8   *
   9   * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
  10   * All rights reserved.</center></h2>
  11   *
  12   * This software component is licensed by ST under BSD 3-Clause license,
  13   * the "License"; You may not use this file except in compliance with the
  14   * License. You may obtain a copy of the License at:
  15   *                        opensource.org/licenses/BSD-3-Clause
  16   *
  17   ******************************************************************************
  18   */
  19
  20 /** @addtogroup CMSIS
  21   * @{
  22   */
  23
  24 /** @addtogroup stm32g4xx_system
  25   * @{
  26   */
  27
  28 /**
  29   * @brief Define to prevent recursive inclusion
  30   */
  31 #ifndef __SYSTEM_STM32G4XX_H
  32 #define __SYSTEM_STM32G4XX_H
  33
  34 #ifdef __cplusplus
  35  extern "C" {
  36 #endif
  37
  38 /** @addtogroup STM32G4xx_System_Includes
  39   * @{
  40   */
  41
  42 /**
  43   * @}
  44   */
  45
  46
  47 /** @addtogroup STM32G4xx_System_Exported_Variables
  48   * @{
  49   */
  50   /* The SystemCoreClock variable is updated in three ways:
  51       1) by calling CMSIS function SystemCoreClockUpdate()
  52       2) by calling HAL API function HAL_RCC_GetSysClockFreq()
  53       3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
  54          Note: If you use this function to configure the system clock; then there
  55                is no need to call the 2 first functions listed above, since SystemCoreClock
  56                variable is updated automatically.
  57   */
  58 extern uint32_t SystemCoreClock;            /*!< System Clock Frequency (Core Clock) */
  59
  60 extern const uint8_t  AHBPrescTable[16];    /*!< AHB prescalers table values */
  61 extern const uint8_t  APBPrescTable[8];     /*!< APB prescalers table values */
  62
  63 /**
  64   * @}
  65   */
  66
  67 /** @addtogroup STM32G4xx_System_Exported_Constants
  68   * @{
  69   */
  70
  71 /**
  72   * @}
  73   */
  74
  75 /** @addtogroup STM32G4xx_System_Exported_Macros
  76   * @{
  77   */
  78
  79 /**
  80   * @}
  81   */
  82
  83 /** @addtogroup STM32G4xx_System_Exported_Functions
  84   * @{
  85   */
  86
  87 extern void SystemInit(void);
  88 extern void SystemCoreClockUpdate(void);
  89 /**
  90   * @}
  91   */
  92
  93 #ifdef __cplusplus
  94 }
  95 #endif
  96
  97 #endif /*__SYSTEM_STM32G4XX_H */
  98
  99 /**
 100   * @}
 101   */
 102
 103 /**
 104   * @}
 105   */
 106 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/