1 /**
2   ******************************************************************************
3   * @file    system_stm32g0xx.h
4   * @author  MCD Application Team
5   * @brief   CMSIS Cortex-M0+ Device System Source File for STM32G0xx devices.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2018-2021 STMicroelectronics.
10   * All rights reserved.
11   *
12   * This software is licensed under terms that can be found in the LICENSE file
13   * in the root directory of this software component.
14   * If no LICENSE file comes with this software, it is provided AS-IS.
15   *
16   ******************************************************************************
17   */
18 /** @addtogroup CMSIS
19   * @{
20   */
21 
22 /** @addtogroup stm32g0xx_system
23   * @{
24   */
25 
26 /**
27   * @brief Define to prevent recursive inclusion
28   */
29 #ifndef SYSTEM_STM32G0XX_H
30 #define SYSTEM_STM32G0XX_H
31 
32 #ifdef __cplusplus
33  extern "C" {
34 #endif
35 
36 /** @addtogroup STM32G0xx_System_Includes
37   * @{
38   */
39 
40 /**
41   * @}
42   */
43 
44 
45 /** @addtogroup STM32G0xx_System_Exported_types
46   * @{
47   */
48   /* This variable is updated in three ways:
49       1) by calling CMSIS function SystemCoreClockUpdate()
50       2) by calling HAL API function HAL_RCC_GetSysClockFreq()
51       3) each time HAL_RCC_ClockConfig()  is called to configure the system clock frequency
52          Note: If you use this function to configure the system clock; then there
53                is no need to call the 2 first functions listed above, since SystemCoreClock
54                variable is updated automatically.
55   */
56 extern uint32_t SystemCoreClock;         /*!< System Clock Frequency (Core Clock) */
57 
58 extern const uint32_t AHBPrescTable[16];  /*!<  AHB prescalers table values */
59 extern const uint32_t APBPrescTable[8];   /*!< APB prescalers table values */
60 
61 /**
62   * @}
63   */
64 
65 /** @addtogroup STM32G0xx_System_Exported_Constants
66   * @{
67   */
68 
69 /**
70   * @}
71   */
72 
73 /** @addtogroup STM32G0xx_System_Exported_Macros
74   * @{
75   */
76 
77 /**
78   * @}
79   */
80 
81 /** @addtogroup STM32G0xx_System_Exported_Functions
82   * @{
83   */
84 
85 extern void SystemInit(void);
86 extern void SystemCoreClockUpdate(void);
87 /**
88   * @}
89   */
90 
91 #ifdef __cplusplus
92 }
93 #endif
94 
95 #endif /*SYSTEM_STM32G0XX_H */
96 
97 /**
98   * @}
99   */
100 
101 /**
102   * @}
103   */
104