65 lines
1.6 KiB
C
65 lines
1.6 KiB
C
/**
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* \file
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*
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* \brief Low-level initialization functions called upon chip startup.
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*
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* Copyright (c) 2018 Microchip Technology Inc.
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*
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* \asf_license_start
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*
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* \page License
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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 Licence at
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*
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* http://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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* \asf_license_stop
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*
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*/
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#include "same54.h"
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/**
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* Initial system clock frequency. The System RC Oscillator (RCSYS) provides
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* the source for the main clock at chip startup.
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*/
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#define __SYSTEM_CLOCK (48000000)
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uint32_t SystemCoreClock = __SYSTEM_CLOCK; /*!< System Clock Frequency (Core Clock)*/
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/**
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* Initialize the system
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*
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* @brief Setup the microcontroller system.
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* Initialize the System and update the SystemCoreClock variable.
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*/
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void SystemInit(void)
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{
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// Keep the default device state after reset
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SystemCoreClock = __SYSTEM_CLOCK;
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return;
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}
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/**
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* Update SystemCoreClock variable
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*
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* @brief Updates the SystemCoreClock with current core Clock
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* retrieved from cpu registers.
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*/
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void SystemCoreClockUpdate(void)
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{
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// Not implemented
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SystemCoreClock = __SYSTEM_CLOCK;
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return;
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}
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