1 /** 2 ****************************************************************************** 3 * @file system_stm32l5xx.h 4 * @author MCD Application Team 5 * @brief CMSIS Cortex-M33 Device System Source File for STM32L5xx devices. 6 ****************************************************************************** 7 * @attention 8 * 9 * <h2><center>© Copyright (c) 2019 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 STM32L5xx_system 25 * @{ 26 */ 27 28 #ifndef SYSTEM_STM32L5XX_H 29 #define SYSTEM_STM32L5XX_H 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 /** @addtogroup STM32L5xx_System_Includes 36 * @{ 37 */ 38 #include <stdint.h> 39 /** 40 * @} 41 */ 42 43 /** @addtogroup STM32L5xx_System_Exported_Variables 44 * @{ 45 */ 46 /* The SystemCoreClock variable is updated in three ways: 47 1) by calling CMSIS function SystemCoreClockUpdate() 48 2) by calling HAL API function HAL_RCC_GetSysClockFreq() 49 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency 50 Note: If you use this function to configure the system clock; then there 51 is no need to call the 2 first functions listed above, since SystemCoreClock 52 variable is updated automatically. 53 */ 54 extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */ 55 56 extern const uint8_t AHBPrescTable[16]; /*!< AHB prescalers table values */ 57 extern const uint8_t APBPrescTable[8]; /*!< APB prescalers table values */ 58 extern const uint32_t MSIRangeTable[16]; /*!< MSI ranges table values */ 59 60 /** 61 * @} 62 */ 63 64 /** @addtogroup STM32L5xx_System_Exported_Functions 65 * @{ 66 */ 67 68 /** 69 \brief Exception / Interrupt Handler Function Prototype 70 */ 71 typedef void(*VECTOR_TABLE_Type)(void); 72 73 /** 74 \brief Setup the microcontroller system. 75 76 Initialize the System and update the SystemCoreClock variable. 77 */ 78 extern void SystemInit (void); 79 80 81 /** 82 \brief Update SystemCoreClock variable. 83 84 Updates the SystemCoreClock with current core Clock retrieved from cpu registers. 85 */ 86 extern void SystemCoreClockUpdate (void); 87 88 89 /** 90 \brief Update SystemCoreClock variable from secure application and return its value 91 when security is implemented in the system (Non-secure callable function). 92 93 Returns the SystemCoreClock value with current core Clock retrieved from cpu registers. 94 */ 95 extern uint32_t SECURE_SystemCoreClockUpdate(void); 96 97 /** 98 * @} 99 */ 100 101 #ifdef __cplusplus 102 } 103 #endif 104 105 #endif /* SYSTEM_STM32L5XX_H */ 106 107 /** 108 * @} 109 */ 110 111 /** 112 * @} 113 */ 114 115 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ 116
