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1.8 KiB
C

/**
* \file
*
* \brief System configuration file for ATSAMD21G16B
*
* Copyright (c) 2020 Microchip Technology Inc.
*
* \license_start
*
* \page License
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* \license_stop
*
*/
#include "samd21g16b.h"
/** \cond 0 */
/* *INDENT-OFF* */
#ifdef __cplusplus
extern "C" {
#endif
/* *INDENT-ON* */
/** \endcond */
/**
* Initial system clock frequency. The System RC Oscillator (RCSYS) provides
* the source for the main clock at chip startup.
*/
#define __SYSTEM_CLOCK (1000000)
uint32_t SystemCoreClock = __SYSTEM_CLOCK; /*!< System Clock Frequency (Core Clock)*/
/**
* Initialize the system
*
* \brief Setup the microcontroller system.
* Initialize the System and update the SystemCoreClock variable.
*/
void SystemInit(void)
{
// Keep the default device state after reset
SystemCoreClock = __SYSTEM_CLOCK;
return;
}
/**
* Update SystemCoreClock variable
*
* \brief Updates the SystemCoreClock with current core Clock
* retrieved from cpu registers.
*/
void SystemCoreClockUpdate(void)
{
// Not implemented
SystemCoreClock = __SYSTEM_CLOCK;
return;
}
/** \cond 0 */
/* *INDENT-OFF* */
#ifdef __cplusplus
}
#endif
/* *INDENT-ON* */
/** \endcond */