2014-06-11 14:59:24 +02:00
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/*
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* Copyright (C) 2014 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License v2.1. See the file LICENSE in the top level directory for more
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* details.
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*/
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/**
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* @ingroup cpu_cortexm3_common
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* @{
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*
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* @file
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2014-07-03 10:36:46 +02:00
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* @brief CMSIS system header definitions for the Cortex-M3
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2014-06-11 14:59:24 +02:00
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*
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*/
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#ifndef __CMSIS_SYSTEM_H
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#define __CMSIS_SYSTEM_H
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#include <stdint.h>
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/**
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* @brief This variable holds the current CPU core clock frequency in Hz
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*/
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extern uint32_t SystemCoreClock;
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/**
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* @brief Initialize the system's clock system
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*
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* This function sets up the system's clock tree, concerning all options
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* regarding PLL setup, external clock source configuration and prescaler
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* setup for peripheral buses.
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*/
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void SystemInit(void);
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/**
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* @brief Update the `SystemCoreClock` variable with the current core clock value
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*/
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void SystemCoreClockUpdate(void);
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#endif /* __CMSIS_SYSTEM_H */
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