/**
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* @ file system_stm32f4xx . h
* @ author MCD Application Team
* @ version V2 .6 .0
* @ date 04 - November - 2016
* @ brief CMSIS Cortex - M4 Device System Source File for STM32F4xx devices .
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* @ attention
*
* < h2 > < center > & copy ; COPYRIGHT ( c ) 2016 STMicroelectronics < / center > < / h2 >
*
* Redistribution and use in source and binary forms , with or without modification ,
* are permitted provided that the following conditions are met :
* 1. Redistributions of source code must retain the above copyright notice ,
* this list of conditions and the following disclaimer .
* 2. Redistributions in binary form must reproduce the above copyright notice ,
* this list of conditions and the following disclaimer in the documentation
* and / or other materials provided with the distribution .
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission .
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS " AS IS "
* AND ANY EXPRESS OR IMPLIED WARRANTIES , INCLUDING , BUT NOT LIMITED TO , THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED . IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT , INDIRECT , INCIDENTAL , SPECIAL , EXEMPLARY , OR CONSEQUENTIAL
* DAMAGES ( INCLUDING , BUT NOT LIMITED TO , PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES ; LOSS OF USE , DATA , OR PROFITS ; OR BUSINESS INTERRUPTION ) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY , WHETHER IN CONTRACT , STRICT LIABILITY ,
* OR TORT ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE , EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
/** @addtogroup CMSIS
* @ {
*/
/** @addtogroup stm32f4xx_system
* @ {
*/
/**
* @ brief Define to prevent recursive inclusion
*/
# ifndef __SYSTEM_STM32F4XX_H
# define __SYSTEM_STM32F4XX_H
# ifdef __cplusplus
extern " C " {
# endif
/** @addtogroup STM32F4xx_System_Includes
* @ {
*/
/**
* @ }
*/
/** @addtogroup STM32F4xx_System_Exported_types
* @ {
*/
/* This variable is updated in three ways:
1 ) by calling CMSIS function SystemCoreClockUpdate ( )
2 ) by calling HAL API function HAL_RCC_GetSysClockFreq ( )
3 ) each time HAL_RCC_ClockConfig ( ) is called to configure the system clock frequency
Note : If you use this function to configure the system clock ; then there
is no need to call the 2 first functions listed above , since SystemCoreClock
variable is updated automatically .
*/
extern uint32_t SystemCoreClock ; /*!< System Clock Frequency (Core Clock) */
extern const uint8_t AHBPrescTable [ 16 ] ; /*!< AHB prescalers table values */
extern const uint8_t APBPrescTable [ 8 ] ; /*!< APB prescalers table values */
/**
* @ }
*/
/** @addtogroup STM32F4xx_System_Exported_Constants
* @ {
*/
/**
* @ }
*/
/** @addtogroup STM32F4xx_System_Exported_Macros
* @ {
*/
/**
* @ }
*/
/** @addtogroup STM32F4xx_System_Exported_Functions
* @ {
*/
extern void SystemInit ( void ) ;
extern void SystemCoreClockUpdate ( void ) ;
/**
* @ }
*/
# ifdef __cplusplus
}
# endif
# endif /*__SYSTEM_STM32F4XX_H */
/**
* @ }
*/
/**
* @ }
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
