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+ − 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****/