| /** |
| * \file |
| * |
| * \brief Low-level initialization functions called upon chip startup. |
| * |
| * Copyright (c) 2018 Microchip Technology Inc. |
| * |
| * \asf_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 Licence 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. |
| * |
| * \asf_license_stop |
| * |
| */ |
| |
| #include "same54.h" |
| |
| /** |
| * Initial system clock frequency. The System RC Oscillator (RCSYS) provides |
| * the source for the main clock at chip startup. |
| */ |
| #define __SYSTEM_CLOCK (48000000) |
| |
| 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; |
| } |