1 /**************************************************************************//**
2 * @file system_ARMCM0.c
3 * @brief CMSIS Device System Source File for
4 * ARMCM0 Device
5 * @version V5.3.1
6 * @date 09. July 2018
7 ******************************************************************************/
8 /*
9 * Copyright (c) 2009-2018 Arm Limited. All rights reserved.
10 *
11 * SPDX-License-Identifier: Apache-2.0
12 *
13 * Licensed under the Apache License, Version 2.0 (the License); you may
14 * not use this file except in compliance with the License.
15 * You may obtain a copy of the License at
16 *
17 * www.apache.org/licenses/LICENSE-2.0
18 *
19 * Unless required by applicable law or agreed to in writing, software
20 * distributed under the License is distributed on an AS IS BASIS, WITHOUT
21 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
22 * See the License for the specific language governing permissions and
23 * limitations under the License.
24 */
25
26 #include "ARMCM0.h"
27
28 /*----------------------------------------------------------------------------
29 Define clocks
30 *----------------------------------------------------------------------------*/
31 #define XTAL (50000000UL) /* Oscillator frequency */
32
33 #define SYSTEM_CLOCK (XTAL / 2U)
34
35
36 /*----------------------------------------------------------------------------
37 System Core Clock Variable
38 *----------------------------------------------------------------------------*/
39 uint32_t SystemCoreClock = SYSTEM_CLOCK; /* System Core Clock Frequency */
40
41
42 /*----------------------------------------------------------------------------
43 System Core Clock update function
44 *----------------------------------------------------------------------------*/
SystemCoreClockUpdate(void)45 void SystemCoreClockUpdate (void)
46 {
47 SystemCoreClock = SYSTEM_CLOCK;
48 }
49
50 /*----------------------------------------------------------------------------
51 System initialization function
52 *----------------------------------------------------------------------------*/
SystemInit(void)53 void SystemInit (void)
54 {
55 SystemCoreClock = SYSTEM_CLOCK;
56 }
57
