fsl_clock.c File Reference

Functions
static uint32_t	CLOCK_GetSysPllCommonFreq (void)
	Get the common System PLL frequency for both RAW SPLL output and SPLL PFD output.
uint32_t	CLOCK_GetErClkFreq (void)
	Get the external reference clock frequency (ERCLK).
uint32_t	CLOCK_GetOsc32kClkFreq (void)
	Get the OSC 32K clock frequency (OSC32KCLK).
uint32_t	CLOCK_GetFlashClkFreq (void)
	Get the flash clock frequency.
uint32_t	CLOCK_GetBusClkFreq (void)
	Get the bus clock frequency.
uint32_t	CLOCK_GetCoreSysClkFreq (void)
	Get the core clock or system clock frequency.
uint32_t	CLOCK_GetFreq (clock_name_t clockName)
	Gets the clock frequency for a specific clock name.
uint32_t	CLOCK_GetIpFreq (clock_ip_name_t name)
	Gets the clock frequency for a specific IP module.
void	OSC32_Init (OSC32_Type *base, osc32_mode_t mode)
	Initializes OSC32.
void	OSC32_Deinit (OSC32_Type *base)
	Deinitializes OSC32.
uint32_t	CLOCK_GetSysClkFreq (scg_sys_clk_t type)
	Gets the SCG system clock frequency.
status_t	CLOCK_InitSysOsc (const scg_sosc_config_t *config)
	Initializes the SCG system OSC.
status_t	CLOCK_DeinitSysOsc (void)
	De-initializes the SCG system OSC.
uint32_t	CLOCK_GetSysOscFreq (void)
	Gets the SCG system OSC clock frequency (SYSOSC).
uint32_t	CLOCK_GetSysOscAsyncFreq (scg_async_clk_t type)
	Gets the SCG asynchronous clock frequency from the system OSC.
status_t	CLOCK_InitSirc (const scg_sirc_config_t *config)
	Initializes the SCG slow IRC clock.
status_t	CLOCK_DeinitSirc (void)
	De-initializes the SCG slow IRC.
uint32_t	CLOCK_GetSircFreq (void)
	Gets the SCG SIRC clock frequency.
uint32_t	CLOCK_GetSircAsyncFreq (scg_async_clk_t type)
	Gets the SCG asynchronous clock frequency from the SIRC.
status_t	CLOCK_InitFirc (const scg_firc_config_t *config)
	Initializes the SCG fast IRC clock.
status_t	CLOCK_DeinitFirc (void)
	De-initializes the SCG fast IRC.
uint32_t	CLOCK_GetFircFreq (void)
	Gets the SCG FIRC clock frequency.
uint32_t	CLOCK_GetFircAsyncFreq (scg_async_clk_t type)
	Gets the SCG asynchronous clock frequency from the FIRC.
uint32_t	CLOCK_GetSysPllMultDiv (uint32_t refFreq, uint32_t desireFreq, uint8_t *mult, uint8_t *prediv)
	Calculates the MULT and PREDIV for the PLL.
status_t	CLOCK_InitSysPll (const scg_spll_config_t *config)
	Initializes the SCG system PLL.
status_t	CLOCK_DeinitSysPll (void)
	De-initializes the SCG system PLL.
uint32_t	CLOCK_GetSysPllFreq (void)
	Gets the SCG system PLL clock frequency.
uint32_t	CLOCK_GetSysPllAsyncFreq (scg_async_clk_t type)
	Gets the SCG asynchronous clock frequency from the system PLL.

Variables
volatile uint32_t	g_xtal0Freq
	External XTAL0 (OSC0/SYSOSC) clock frequency.
volatile uint32_t	g_xtal32Freq
	External XTAL32/EXTAL32 clock frequency.

Function Documentation

CLOCK_GetSysPllCommonFreq()

static uint32_t CLOCK_GetSysPllCommonFreq ( void  )

static

Get the common System PLL frequency for both RAW SPLL output and SPLL PFD output.

The "raw" SPLL output is the clkout divided by postdiv1-2 of SAPLL. The "common" System PLL frequency is the common part for both RAW SPLL and SPLL PFD output. That is the frequency calculated based on the clock source which passes through POSTDIV & MULT. "Common" SPLL Frequency = Divided Reference Frequency * MULT

Returns

Clock frequency; If the clock is invalid, returns 0.

Definition at line 1053 of file fsl_clock.c.

{
    uint32_t freq = 0U;
 
    if (SCG->SPLLCFG & SCG_SPLLCFG_SOURCE_MASK) /* If use FIRC */
    {
        freq = CLOCK_GetFircFreq();
    }
    else /* Use System OSC. */
    {
        freq = CLOCK_GetSysOscFreq();
    }
 
    if (freq) /* If source is valid. */
    {
        freq /= (SCG_SPLLCFG_PREDIV_VAL + SCG_SPLL_PREDIV_BASE_VALUE); /* Pre-divider. */
        freq *= (SCG_SPLLCFG_MULT_VAL + SCG_SPLL_MULT_BASE_VALUE);     /* Multiplier. */
    }
 
    return freq;
}

Referenced by CLOCK_GetSysPllFreq().

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