1 /**
2   ******************************************************************************
3   * @file    system_stm32l1xx.h
4   * @author  MCD Application Team
5   * @brief   CMSIS Cortex-M3 Device System Source File for STM32L1xx devices.
6   ******************************************************************************
7   * @attention
8   *
9   * Copyright (c) 2017-2021 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 
19 /** @addtogroup CMSIS
20   * @{
21   */
22 
23 /** @addtogroup stm32l1xx_system
24   * @{
25   */
26 
27 /**
28   * @brief Define to prevent recursive inclusion
29   */
30 #ifndef __SYSTEM_STM32L1XX_H
31 #define __SYSTEM_STM32L1XX_H
32 
33 #ifdef __cplusplus
34  extern "C" {
35 #endif
36 
37 /** @addtogroup STM32L1xx_System_Includes
38   * @{
39   */
40 
41 /**
42   * @}
43   */
44 
45 
46 /** @addtogroup STM32L1xx_System_Exported_types
47   * @{
48   */
49   /* This variable is updated in three ways:
50       1) by calling CMSIS function SystemCoreClockUpdate()
51       2) by calling HAL API function HAL_RCC_GetSysClockFreq()
52       3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
53          Note: If you use this function to configure the system clock; then there
54                is no need to call the 2 first functions listed above, since SystemCoreClock
55                variable is updated automatically.
56   */
57 extern uint32_t SystemCoreClock;          /*!< System Clock Frequency (Core Clock) */
58 /*
59 */
60 extern const uint8_t AHBPrescTable[16];   /*!< AHB prescalers table values */
61 extern const uint8_t APBPrescTable[8];    /*!< APB prescalers table values */
62 extern const uint8_t PLLMulTable[9];      /*!< PLL multipiers table values */
63 
64 /**
65   * @}
66   */
67 
68 /** @addtogroup STM32L1xx_System_Exported_Constants
69   * @{
70   */
71 
72 /**
73   * @}
74   */
75 
76 /** @addtogroup STM32L1xx_System_Exported_Macros
77   * @{
78   */
79 
80 /**
81   * @}
82   */
83 
84 /** @addtogroup STM32L1xx_System_Exported_Functions
85   * @{
86   */
87 
88 extern void SystemInit(void);
89 extern void SystemCoreClockUpdate(void);
90 /**
91   * @}
92   */
93 
94 #ifdef __cplusplus
95 }
96 #endif
97 
98 #endif /*__SYSTEM_STM32L1XX_H */
99 
100 /**
101   * @}
102   */
103 
104 /**
105   * @}
106   */
107