1 /**************************************************************************//**
2  * @file     system_ARMCM0.h
3  * @brief    CMSIS Device System Header 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 #ifndef SYSTEM_ARMCM0_H
27 #define SYSTEM_ARMCM0_H
28 
29 #ifdef __cplusplus
30 extern "C" {
31 #endif
32 
33 extern uint32_t SystemCoreClock;     /*!< System Clock Frequency (Core Clock) */
34 
35 
36 /**
37   \brief Setup the microcontroller system.
38 
39    Initialize the System and update the SystemCoreClock variable.
40  */
41 extern void SystemInit (void);
42 
43 
44 /**
45   \brief  Update SystemCoreClock variable.
46 
47    Updates the SystemCoreClock with current core Clock retrieved from cpu registers.
48  */
49 extern void SystemCoreClockUpdate (void);
50 
51 #ifdef __cplusplus
52 }
53 #endif
54 
55 #endif /* SYSTEM_ARMCM0_H */
56