123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
|
/**
|
||
|
|
******************************************************************************
|
||
|
|
* @file system_stm32f4xx.h
|
||
|
|
* @author MCD Application Team
|
||
|
|
* @brief CMSIS Cortex-M4 Device System Source File for STM32F4xx devices.
|
||
|
|
******************************************************************************
|
||
|
|
* @attention
|
||
|
|
*
|
||
|
|
* <h2><center>© COPYRIGHT(c) 2017 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****/
|