marcus chiou / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/cmsis/TARGET_Atmel/TARGET_SAM21/TARGET_SAMR21G18A/system_samr21.c

Committer:
mbed_official
Date:
2015-07-17
Revision:
592:a274ee790e56
Parent:
579:53297373a894

File content as of revision 592:a274ee790e56:

#include "samr21g18a.h"

/**
 * Initial system clock frequency. The System RC Oscillator (RCSYS) provides
 *  the source for the main clock at chip startup.
 */
#define __SYSTEM_CLOCK    (1000000)

uint32_t SystemCoreClock = __SYSTEM_CLOCK;/*!< System Clock Frequency (Core Clock)*/

/**
 * Initialize the system
 *
 * @brief  Setup the microcontroller system.
 *         Initialize the System and update the SystemCoreClock variable.
 */
void SystemInit(void)
{
    // Keep the default device state after reset
    SystemCoreClock = __SYSTEM_CLOCK;
    return;
}

/**
 * Update SystemCoreClock variable
 *
 * @brief  Updates the SystemCoreClock with current core Clock
 *         retrieved from cpu registers.
 */
void SystemCoreClockUpdate(void)
{
    // Not implemented
    SystemCoreClock = __SYSTEM_CLOCK;
    return;
}