/******************************************************************************
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* @file system_MK8000.c
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* @brief CMSIS Device System Source File for
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* Device MK8000
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* @version V5.00
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* @date 10. January 2018
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******************************************************************************/
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/*
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* Copyright (c) 2009-2018 Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "MK800X.h"
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/*----------------------------------------------------------------------------
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Define clocks
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*----------------------------------------------------------------------------*/
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/* ToDo: add here your necessary defines for device initialization
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following is an example for different system frequencies */
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#define XTAL (38400000U) /* Oscillator frequency */
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#define SYSTEM_CLOCK (13 * XTAL / 8)
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/*----------------------------------------------------------------------------
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System Core Clock Variable
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*----------------------------------------------------------------------------*/
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/* ToDo: initialize SystemCoreClock with the system core clock frequency value
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achieved after system intitialization.
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This means system core clock frequency after call to SystemInit() */
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uint32_t SystemCoreClock = SYSTEM_CLOCK; /* System Clock Frequency (Core Clock)*/
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/*----------------------------------------------------------------------------
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Clock functions
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*----------------------------------------------------------------------------*/
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void SystemCoreClockUpdate(void) /* Get Core Clock Frequency */
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{
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/* ToDo: add code to calculate the system frequency based upon the current
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register settings.
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This function can be used to retrieve the system core clock frequeny
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after user changed register sittings. */
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SystemCoreClock = SYSTEM_CLOCK;
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}
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void SystemInit(void)
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{
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/* ToDo: add code to initialize the system
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do not use global variables because this function is called before
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reaching pre-main. RW section maybe overwritten afterwards. */
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SystemCoreClock = SYSTEM_CLOCK;
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}
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