blob: 9eceb0008838373bdec4d6ce01e32059d1f10206 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/**
******************************************************************************
* @file system_stm32l4xx.h
* @author MCD Application Team
* @brief CMSIS Cortex-M4 Device System Source File for STM32L4xx devices.
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2017 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 stm32l4xx_system
* @{
*/
/**
* @brief Define to prevent recursive inclusion
*/
#ifndef __SYSTEM_STM32L4XX_H
#define __SYSTEM_STM32L4XX_H
#ifdef __cplusplus
extern "C" {
#endif
/** @addtogroup STM32L4xx_System_Includes
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_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 */
extern const uint32_t MSIRangeTable[12]; /*!< MSI ranges table values */
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Constants
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Macros
* @{
*/
/**
* @}
*/
/** @addtogroup STM32L4xx_System_Exported_Functions
* @{
*/
extern void SystemInit(void);
extern void SystemCoreClockUpdate(void);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /*__SYSTEM_STM32L4XX_H */
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|
