#include "samd21.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; }