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126 lines
3.8 KiB
C
126 lines
3.8 KiB
C
7 years ago
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/**
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******************************************************************************
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* @file system_stm32l4xx.h
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* @author MCD Application Team
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* @version V1.1.1
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* @date 29-April-2016
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* @brief CMSIS Cortex-M4 Device System Source File for STM32L4xx devices.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/** @addtogroup CMSIS
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* @{
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*/
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/** @addtogroup stm32l4xx_system
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* @{
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*/
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/**
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* @brief Define to prevent recursive inclusion
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*/
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#ifndef __SYSTEM_STM32L4XX_H
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#define __SYSTEM_STM32L4XX_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** @addtogroup STM32L4xx_System_Includes
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* @{
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*/
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/**
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* @}
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*/
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/** @addtogroup STM32L4xx_System_Exported_Variables
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* @{
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*/
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/* The SystemCoreClock variable is updated in three ways:
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1) by calling CMSIS function SystemCoreClockUpdate()
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2) by calling HAL API function HAL_RCC_GetSysClockFreq()
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3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
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Note: If you use this function to configure the system clock; then there
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is no need to call the 2 first functions listed above, since SystemCoreClock
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variable is updated automatically.
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*/
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extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */
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extern const uint8_t AHBPrescTable[16]; /*!< AHB prescalers table values */
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extern const uint8_t APBPrescTable[8]; /*!< APB prescalers table values */
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extern const uint32_t MSIRangeTable[12]; /*!< MSI ranges table values */
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/**
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* @}
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*/
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/** @addtogroup STM32L4xx_System_Exported_Constants
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* @{
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*/
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/**
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* @}
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*/
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/** @addtogroup STM32L4xx_System_Exported_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @addtogroup STM32L4xx_System_Exported_Functions
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* @{
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*/
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extern void SystemInit(void);
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extern void SystemCoreClockUpdate(void);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /*__SYSTEM_STM32L4XX_H */
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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