1 /** 2 ****************************************************************************** 3 * @file system_stm32l0xx.h 4 * @author MCD Application Team 5 * @brief CMSIS Cortex-M0+ Device Peripheral Access Layer System Header File. 6 ****************************************************************************** 7 * @attention 8 * 9 * <h2><center>© Copyright(c) 2016 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 stm32l0xx_system 25 * @{ 26 */ 27 28 /** 29 * @brief Define to prevent recursive inclusion 30 */ 31 #ifndef __SYSTEM_STM32L0XX_H 32 #define __SYSTEM_STM32L0XX_H 33 34 #ifdef __cplusplus 35 extern "C" { 36 #endif 37 38 /** @addtogroup STM32L0xx_System_Includes 39 * @{ 40 */ 41 42 /** 43 * @} 44 */ 45 46 47 /** @addtogroup STM32L0xx_System_Exported_types 48 * @{ 49 */ 50 /* This 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 */ 61 extern const uint8_t AHBPrescTable[16]; /*!< AHB prescalers table values */ 62 extern const uint8_t APBPrescTable[8]; /*!< APB prescalers table values */ 63 extern const uint8_t PLLMulTable[9]; /*!< PLL multipiers table values */ 64 65 66 /** 67 * @} 68 */ 69 70 /** @addtogroup STM32L0xx_System_Exported_Constants 71 * @{ 72 */ 73 74 /** 75 * @} 76 */ 77 78 /** @addtogroup STM32L0xx_System_Exported_Macros 79 * @{ 80 */ 81 82 /** 83 * @} 84 */ 85 86 /** @addtogroup STM32L0xx_System_Exported_Functions 87 * @{ 88 */ 89 90 extern void SystemInit(void); 91 extern void SystemCoreClockUpdate(void); 92 /** 93 * @} 94 */ 95 96 #ifdef __cplusplus 97 } 98 #endif 99 100 #endif /*__SYSTEM_STM32L0XX_H */ 101 102 /** 103 * @} 104 */ 105 106 /** 107 * @} 108 */ 109 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ 110