system_stm32l4xx.h

00001 /**
00002   ******************************************************************************
00003   * @file    system_stm32l4xx.h
00004   * @author  MCD Application Team
00005   * @version V1.0.1
00006   * @date    16-September-2015
00007   * @brief   CMSIS Cortex-M4 Device System Source File for STM32L4xx devices.
00008   ******************************************************************************
00009   * @attention
00010   *
00011   * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
00012   *
00013   * Redistribution and use in source and binary forms, with or without modification,
00014   * are permitted provided that the following conditions are met:
00015   *   1. Redistributions of source code must retain the above copyright notice,
00016   *      this list of conditions and the following disclaimer.
00017   *   2. Redistributions in binary form must reproduce the above copyright notice,
00018   *      this list of conditions and the following disclaimer in the documentation
00019   *      and/or other materials provided with the distribution.
00020   *   3. Neither the name of STMicroelectronics nor the names of its contributors
00021   *      may be used to endorse or promote products derived from this software
00022   *      without specific prior written permission.
00023   *
00024   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00025   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00026   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00027   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00028   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00029   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00030   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00031   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00032   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00033   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00034   *
00035   ******************************************************************************
00036   */
00037 
00038 /** @addtogroup CMSIS
00039   * @{
00040   */
00041 
00042 /** @addtogroup stm32l4xx_system
00043   * @{
00044   */
00045 
00046 /**
00047   * @brief Define to prevent recursive inclusion
00048   */
00049 #ifndef __SYSTEM_STM32L4XX_H
00050 #define __SYSTEM_STM32L4XX_H
00051 
00052 #ifdef __cplusplus
00053  extern "C" {
00054 #endif
00055 
00056 /** @addtogroup STM32L4xx_System_Includes
00057   * @{
00058   */
00059 
00060 /**
00061   * @}
00062   */
00063 
00064 
00065 /** @addtogroup STM32L4xx_System_Exported_types
00066   * @{
00067   */
00068   /* This variable is updated in three ways:
00069       1) by calling CMSIS function SystemCoreClockUpdate()
00070       2) by calling HAL API function HAL_RCC_GetSysClockFreq()
00071       3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
00072          Note: If you use this function to configure the system clock; then there
00073                is no need to call the 2 first functions listed above, since SystemCoreClock
00074                variable is updated automatically.
00075   */
00076 extern uint32_t SystemCoreClock;            /*!< System Clock Frequency (Core Clock) */
00077 
00078 extern const uint8_t AHBPrescTable[16];     /*!< AHB prescalers table values */
00079 extern const uint32_t MSIRangeTable[12];    /*!< MSI ranges table values     */
00080 
00081 /**
00082   * @}
00083   */
00084 
00085 /** @addtogroup STM32L4xx_System_Exported_Constants
00086   * @{
00087   */
00088 
00089 /**
00090   * @}
00091   */
00092 
00093 /** @addtogroup STM32L4xx_System_Exported_Macros
00094   * @{
00095   */
00096 
00097 /**
00098   * @}
00099   */
00100 
00101 /** @addtogroup STM32L4xx_System_Exported_Functions
00102   * @{
00103   */
00104 
00105 extern void SystemInit(void);
00106 extern void SystemCoreClockUpdate(void);
00107 /**
00108   * @}
00109   */
00110 
00111 #ifdef __cplusplus
00112 }
00113 #endif
00114 
00115 #endif /*__SYSTEM_STM32L4XX_H */
00116 
00117 /**
00118   * @}
00119   */
00120 
00121 /**
00122   * @}
00123   */
00124 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
00125