/**
* @brief Get current HCLK clock frequency.
* @param None.
* @return HCLK clock frequency. The clock UNIT is in Hz.
*/
uint32_t SysGet_HCLKFreq(void)
{
uint32_t u32Freqout, u32AHBDivider, u32ClkSel;
u32ClkSel = CLK->CLKSEL0 & CLK_CLKSEL0_HCLK_S_Msk;
if (u32ClkSel == CLK_CLKSEL0_HCLK_S_HXT) { /* external HXT crystal clock */
u32Freqout = __HXT;
} else if(u32ClkSel == CLK_CLKSEL0_HCLK_S_LXT) { /* external LXT crystal clock */
u32Freqout = __LXT;
} else if(u32ClkSel == CLK_CLKSEL0_HCLK_S_PLL) { /* PLL clock */
u32Freqout = SysGet_PLLClockFreq();
} else if(u32ClkSel == CLK_CLKSEL0_HCLK_S_LIRC) { /* internal LIRC oscillator clock */
u32Freqout = __LIRC;
} else { /* internal HIRC oscillator clock */
if((CLK->PWRCTL & CLK_PWRCTL_HIRC_FSEL_Msk) == CLK_PWRCTL_HIRC_FSEL_Msk)
u32Freqout = __HIRC16M;
else
u32Freqout = __HIRC12M;
}
u32AHBDivider = (CLK->CLKDIV0 & CLK_CLKDIV0_HCLK_N_Msk) + 1 ;
return (u32Freqout/u32AHBDivider);
}
/**
* @brief Get current HCLK clock frquency.
* @param None.
* @return HCLK clock frquency. The clock UNIT is in Hz.
*/
uint32_t SysGet_HCLKFreq(void)
{
uint32_t u32Freqout, u32AHBDivider, u32ClkSel;
u32ClkSel = CLK->CLKSEL0 & CLK_CLKSEL0_HCLK_MASK;
if (u32ClkSel == CLK_CLKSEL0_HCLK_HXT) /* external HXT crystal clock */
{
u32Freqout = __XTAL;
}
else if(u32ClkSel == CLK_CLKSEL0_HCLK_LXT) /* external LXT crystal clock */
{
u32Freqout = __RTC_XTAL;
}
else if(u32ClkSel == CLK_CLKSEL0_HCLK_PLL) /* PLL clock */
{
u32Freqout = SysGet_PLLClockFreq();
}
else if(u32ClkSel == CLK_CLKSEL0_HCLK_LIRC) /* internal LIRC oscillator clock */
{
u32Freqout = __IRC10K;
}
else /* internal HIRC oscillator clock */
{
u32Freqout = __IRC12M;
}
u32AHBDivider = (CLK->CLKDIV0 & CLK_CLKDIV0_HCLK_MASK) + 1 ;
return (u32Freqout/u32AHBDivider);
}
