system_nrf51.h

00001 /* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.
00002  *
00003  * The information contained herein is property of Nordic Semiconductor ASA.
00004  * Terms and conditions of usage are described in detail in NORDIC
00005  * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
00006  *
00007  * Licensees are granted free, non-transferable use of the information. NO
00008  * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
00009  * the file.
00010  *
00011  */
00012 
00013 
00014 #ifndef SYSTEM_NRF51_H
00015 #define SYSTEM_NRF51_H
00016 
00017 #ifdef __cplusplus
00018 extern "C" {
00019 #endif
00020 
00021 #include <stdint.h>
00022 #include "nordic_global.h"
00023 
00024 
00025 extern uint32_t SystemCoreClock;    /*!< System Clock Frequency (Core Clock)  */
00026 
00027 /**
00028  * Initialize the system
00029  *
00030  * @param  none
00031  * @return none
00032  *
00033  * @brief  Setup the microcontroller system.
00034  *         Initialize the System and update the SystemCoreClock variable.
00035  */
00036 extern void SystemInit (void);
00037 
00038 /**
00039  * Update SystemCoreClock variable
00040  *
00041  * @param  none
00042  * @return none
00043  *
00044  * @brief  Updates the SystemCoreClock with current core Clock 
00045  *         retrieved from cpu registers.
00046  */
00047 extern void SystemCoreClockUpdate (void);
00048 
00049 #ifdef __cplusplus
00050 }
00051 #endif
00052 
00053 #endif /* SYSTEM_NRF51_H */