1 /**
2   ******************************************************************************
3   * @file    system_stm32n6xx.h
4   * @author  MCD Application Team
5   * @brief   CMSIS Cortex-M55 Device System Source File for STM32N6xx devices.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2023 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 
19 /** @addtogroup CMSIS
20   * @{
21   */
22 
23 /** @addtogroup STM32N6xx_system
24   * @{
25   */
26 
27 #ifndef SYSTEM_STM32N6XX_H
28 #define SYSTEM_STM32N6XX_H
29 
30 #ifdef __cplusplus
31 extern "C" {
32 #endif /* __cplusplus */
33 
34 /** @addtogroup STM32N6xx_System_Includes
35   * @{
36   */
37 #include <stdint.h>
38 /**
39   * @}
40   */
41 
42 /** @addtogroup STM32N6xx_System_Exported_Variables
43   * @{
44   */
45   /* The SystemCoreClock variable is updated in three ways:
46       1) by calling CMSIS function SystemCoreClockUpdate()
47       2) by calling HAL API function HAL_RCC_GetSysClockFreq()
48       3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
49          Note: If you use this function to configure the system clock; then there
50                is no need to call the 2 first functions listed above, since SystemCoreClock
51                variable is updated automatically.
52   */
53 extern uint32_t SystemCoreClock;        /*!< System Clock Frequency (Core Clock)  */
54 /**
55   * @}
56   */
57 
58 /** @addtogroup STM32N6xx_System_Exported_Functions
59   * @{
60   */
61 
62 /**
63   \brief Setup the microcontroller system.
64 
65    Initialize the System and update the SystemCoreClock variable.
66  */
67 extern void SystemInit (void);
68 
69 
70 /**
71   \brief  Update SystemCoreClock variable.
72 
73    Updates the SystemCoreClock with current core Clock retrieved from cpu registers.
74  */
75 extern void SystemCoreClockUpdate (void);
76 
77 
78 /**
79   \brief  Update SystemCoreClock variable from secure application and return its value
80           when security is implemented in the system (Non-secure callable function).
81 
82    Returns the SystemCoreClock value with current core Clock retrieved from cpu registers.
83  */
84 extern uint32_t SECURE_SystemCoreClockUpdate(void);
85 
86 /**
87   * @}
88   */
89 
90 #ifdef __cplusplus
91 }
92 #endif /* __cplusplus */
93 
94 #endif /* SYSTEM_STM32N6XX_H */
95 
96 /**
97   * @}
98   */
99 
100 /**
101   * @}
102   */
103 
104