| 1 | /**
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| 2 | ******************************************************************************
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| 3 | * @file system_stm32f4xx.h
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| 4 | * @author MCD Application Team
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| 5 | * @brief CMSIS Cortex-M4 Device System Source File for STM32F4xx devices.
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| 6 | ******************************************************************************
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| 7 | * @attention
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| 8 | *
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| 9 | * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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| 10 | *
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| 11 | * Redistribution and use in source and binary forms, with or without modification,
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| 12 | * are permitted provided that the following conditions are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright notice,
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| 14 | * this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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| 16 | * this list of conditions and the following disclaimer in the documentation
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| 17 | * and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of STMicroelectronics nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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| 23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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| 25 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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| 28 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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| 29 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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| 31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 32 | *
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| 33 | ******************************************************************************
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| 34 | */
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| 35 |
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| 36 | /** @addtogroup CMSIS
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| 37 | * @{
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| 38 | */
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| 39 |
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| 40 | /** @addtogroup stm32f4xx_system
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| 41 | * @{
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| 42 | */
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| 43 |
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| 44 | /**
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| 45 | * @brief Define to prevent recursive inclusion
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| 46 | */
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| 47 | #ifndef __SYSTEM_STM32F4XX_H
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| 48 | #define __SYSTEM_STM32F4XX_H
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| 49 |
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| 50 | #ifdef __cplusplus
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| 51 | extern "C" {
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| 52 | #endif
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| 53 |
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| 54 | /** @addtogroup STM32F4xx_System_Includes
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| 55 | * @{
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| 56 | */
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| 57 |
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| 58 | /**
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| 59 | * @}
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| 60 | */
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| 61 |
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| 62 |
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| 63 | /** @addtogroup STM32F4xx_System_Exported_types
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| 64 | * @{
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| 65 | */
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| 66 | /* This variable is updated in three ways:
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| 67 | 1) by calling CMSIS function SystemCoreClockUpdate()
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| 68 | 2) by calling HAL API function HAL_RCC_GetSysClockFreq()
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| 69 | 3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
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| 70 | Note: If you use this function to configure the system clock; then there
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| 71 | is no need to call the 2 first functions listed above, since SystemCoreClock
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| 72 | variable is updated automatically.
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| 73 | */
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| 74 | extern uint32_t SystemCoreClock; /*!< System Clock Frequency (Core Clock) */
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| 75 |
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| 76 | extern const uint8_t AHBPrescTable[16]; /*!< AHB prescalers table values */
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| 77 | extern const uint8_t APBPrescTable[8]; /*!< APB prescalers table values */
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| 78 |
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| 79 | /**
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| 80 | * @}
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| 81 | */
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| 82 |
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| 83 | /** @addtogroup STM32F4xx_System_Exported_Constants
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| 84 | * @{
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| 85 | */
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| 86 |
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| 87 | /**
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| 88 | * @}
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| 89 | */
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| 90 |
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| 91 | /** @addtogroup STM32F4xx_System_Exported_Macros
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| 92 | * @{
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| 93 | */
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| 94 |
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| 95 | /**
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| 96 | * @}
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| 97 | */
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| 98 |
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| 99 | /** @addtogroup STM32F4xx_System_Exported_Functions
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| 100 | * @{
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| 101 | */
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| 102 |
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| 103 | extern void SystemInit(void);
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| 104 | extern void SystemCoreClockUpdate(void);
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| 105 | /**
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| 106 | * @}
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| 107 | */
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| 108 |
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| 109 | #ifdef __cplusplus
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| 110 | }
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| 111 | #endif
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| 112 |
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| 113 | #endif /*__SYSTEM_STM32F4XX_H */
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| 114 |
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| 115 | /**
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| 116 | * @}
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| 117 | */
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| 118 |
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| 119 | /**
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| 120 | * @}
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| 121 | */
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| 122 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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