rt-thread/bsp/hc32l136/Libraries/CMSIS/Device/HDSC/HC32L136/Source/system_hc32l13x.c

/*******************************************************************************
* Copyright (C) 2019, Huada Semiconductor Co.,Ltd All rights reserved.
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/******************************************************************************/
/** \file system_hc32l13x.c
 **
 ** System clock initialization.
 ** @link SampleGroup Some description @endlink
 **
 **   - 2019-03-01  1.0  Lux First version.
 **
 ******************************************************************************/

/******************************************************************************/
/* Include files                                                              */
/******************************************************************************/
#include "base_types.h"
#include "hc32l136.h"
#include "system_hc32l13x.h"
#include "sysctrl.h"

/**
 ******************************************************************************
 ** System Clock Frequency (Core Clock) Variable according CMSIS
 ******************************************************************************/
uint32_t SystemCoreClock = 4000000;


//add clock source.
void SystemCoreClockUpdate (void) // Update SystemCoreClock variable
{
    SystemCoreClock = Sysctrl_GetHClkFreq();
}

/**
 ******************************************************************************
 ** \brief  Setup the microcontroller system. Initialize the System and update
 ** the SystemCoreClock variable.
 **
 ** \param  none
 ** \return none
 ******************************************************************************/
void SystemInit(void)
{
    SystemCoreClockUpdate();
    
}