1 /**
2  * \file
3  *
4  * \brief Low-level initialization functions called upon chip startup
5  *
6  * Copyright (c) 2016 Atmel Corporation,
7  *                    a wholly owned subsidiary of Microchip Technology Inc.
8  *
9  * \asf_license_start
10  *
11  * \page License
12  *
13  * Licensed under the Apache License, Version 2.0 (the "License");
14  * you may not use this file except in compliance with the License.
15  * You may obtain a copy of the Licence at
16  *
17  *     http://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,
21  * WITHOUT 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  * \asf_license_stop
26  *
27  */
28 
29 #ifndef _SYSTEM_SAML21_H_INCLUDED_
30 #define _SYSTEM_SAML21_H_INCLUDED_
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35 
36 #include <stdint.h>
37 
38 extern uint32_t SystemCoreClock;   /*!< System Clock Frequency (Core Clock)  */
39 
40 void SystemInit(void);
41 void SystemCoreClockUpdate(void);
42 
43 #ifdef __cplusplus
44 }
45 #endif
46 
47 #endif /* SYSTEM_SAML21_H_INCLUDED */
48