| /*************************************************************************//** |
| * @file system_RP2040.c |
| * @brief CMSIS-Core(M) Device Peripheral Access Layer Header File for |
| * Device RP2040 |
| * @version V1.0.0 |
| * @date 5. May 2021 |
| *****************************************************************************/ |
| /* |
| * Copyright (c) 2009-2021 Arm Limited. All rights reserved. |
| * Copyright (c) 2020 Raspberry Pi (Trading) Ltd. |
| * |
| * 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 |
| * |
| * 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. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| #include <stdint.h> |
| #include "RP2040.h" |
| #include "hardware/clocks.h" |
| |
| /*--------------------------------------------------------------------------- |
| System Core Clock Variable |
| *---------------------------------------------------------------------------*/ |
| uint32_t SystemCoreClock; /* System Clock Frequency (Core Clock)*/ |
| |
| /*--------------------------------------------------------------------------- |
| System Core Clock function |
| *---------------------------------------------------------------------------*/ |
| void SystemCoreClockUpdate (void) |
| { |
| SystemCoreClock = clock_get_hz(clk_sys); |
| } |
| |
| /*--------------------------------------------------------------------------- |
| System initialization function |
| *---------------------------------------------------------------------------*/ |
| void __attribute__((constructor)) SystemInit (void) |
| { |
| SystemCoreClockUpdate(); |
| } |