Description

Clock management unit (CMU) Peripheral API.

This module contains functions for the CMU peripheral of Silicon Labs 32-bit MCUs and SoCs. The CMU module controls oscillators, clocks gates, clock multiplexers, pre-scalers, calibration modules and wait-states.

Data Structures
struct	CMU_LFXOInit_TypeDef
	LFXO initialization structure.

struct	CMU_HFXOInit_TypeDef
	HFXO initialization structure.

Functions
CMU_AUXHFRCOBand_TypeDef	CMU_AUXHFRCOBandGet (void)
	Get the AUXHFRCO band in use.

void	CMU_AUXHFRCOBandSet ( CMU_AUXHFRCOBand_TypeDef band)
	Set the AUXHFRCO band and the tuning value based on the value in the calibration table made during production.

uint32_t	CMU_Calibrate (uint32_t HFCycles, CMU_Osc_TypeDef reference)
	Calibrate the clock.

void	CMU_CalibrateConfig (uint32_t downCycles, CMU_Osc_TypeDef downSel, CMU_Osc_TypeDef upSel)
	Configure the clock calibration.

uint32_t	CMU_CalibrateCountGet (void)
	Get the calibration count register.

void	CMU_ClockEnable ( CMU_Clock_TypeDef clock, bool enable)
	Enable/disable a clock.

CMU_ClkDiv_TypeDef	CMU_ClockDivGet ( CMU_Clock_TypeDef clock)
	Get the clock divisor/prescaler.

void	CMU_ClockDivSet ( CMU_Clock_TypeDef clock, CMU_ClkDiv_TypeDef div)
	Set the clock divisor/prescaler.

uint32_t	CMU_ClockFreqGet ( CMU_Clock_TypeDef clock)
	Get the clock frequency for a clock point.

void	CMU_ClockSelectSet ( CMU_Clock_TypeDef clock, CMU_Select_TypeDef ref)
	Select the reference clock/oscillator used for a clock branch.

CMU_Select_TypeDef	CMU_ClockSelectGet ( CMU_Clock_TypeDef clock)
	Get the currently selected reference clock used for a clock branch.

uint16_t	CMU_LF_ClockPrecisionGet ( CMU_Clock_TypeDef clock)
	Gets the precision (in PPM) of the specified low frequency clock branch.

void	CMU_FreezeEnable (bool enable)
	CMU low frequency register synchronization freeze control.

CMU_HFRCOBand_TypeDef	CMU_HFRCOBandGet (void)
	Get HFRCO band in use.

void	CMU_HFRCOBandSet ( CMU_HFRCOBand_TypeDef band)
	Set HFRCO band and the tuning value based on the value in the calibration table made during production.

uint32_t	CMU_HFRCOStartupDelayGet (void)
	Get the HFRCO startup delay.

void	CMU_HFRCOStartupDelaySet (uint32_t delay)
	Set the HFRCO startup delay.

void	CMU_HFXOInit (const CMU_HFXOInit_TypeDef *hfxoInit)
	Set HFXO control registers.

uint32_t	CMU_LCDClkFDIVGet (void)
	Get the LCD framerate divisor (FDIV) setting.

void	CMU_LCDClkFDIVSet (uint32_t div)
	Set the LCD framerate divisor (FDIV) setting.

void	CMU_LFXOInit (const CMU_LFXOInit_TypeDef *lfxoInit)
	Set LFXO control registers.

void	CMU_LFXOPrecisionSet (uint16_t precision)
	Sets LFXO's crystal precision, in PPM.

void	CMU_OscillatorEnable ( CMU_Osc_TypeDef osc, bool enable, bool wait)
	Enable/disable oscillator.

uint32_t	CMU_OscillatorTuningGet ( CMU_Osc_TypeDef osc)
	Get the oscillator frequency tuning setting.

void	CMU_OscillatorTuningSet ( CMU_Osc_TypeDef osc, uint32_t val)
	Set the oscillator frequency tuning control.

void	CMU_PCNTClockExternalSet (unsigned int instance, bool external)
	Select the PCNTn clock.

bool	CMU_PCNTClockExternalGet (unsigned int instance)
	Determine if the currently selected PCNTn clock used is external or LFBCLK.

void	CMU_UpdateWaitStates (uint32_t freq, int vscale)
	Configure various wait states to switch to a certain frequency and a certain voltage scale.

void	CMU_CalibrateCont (bool enable)
	Configure continuous calibration mode.

void	CMU_CalibrateStart (void)
	Start calibration.

void	CMU_CalibrateStop (void)
	Stop the calibration counters.

uint32_t	CMU_DivToLog2 ( CMU_ClkDiv_TypeDef div)
	Convert dividend to logarithmic value.

void	CMU_IntClear (uint32_t flags)
	Clear one or more pending CMU interrupts.

void	CMU_IntDisable (uint32_t flags)
	Disable one or more CMU interrupts.

void	CMU_IntEnable (uint32_t flags)
	Enable one or more CMU interrupts.

uint32_t	CMU_IntGet (void)
	Get pending CMU interrupts.

uint32_t	CMU_IntGetEnabled (void)
	Get enabled and pending CMU interrupt flags.

void	CMU_IntSet (uint32_t flags)
	Set one or more pending CMU interrupts.

void	CMU_Lock (void)
	Lock the CMU to protect some of its registers against unintended modification.

uint32_t	CMU_Log2ToDiv (uint32_t log2)
	Convert logarithm of 2 prescaler to division factor.

void	CMU_Unlock (void)
	Unlock the CMU so that writing to locked registers again is possible.

void	syncReg (uint32_t mask)
	Wait for an ongoing sync of register(s) to low-frequency domain to complete.

Macros
#define	cmuClkDiv_1 1
	Clock divisors.

#define	cmuClkDiv_2 2
	Divide clock by 2.

#define	cmuClkDiv_4 4
	Divide clock by 4.

#define	cmuClkDiv_8 8
	Divide clock by 8.

#define	cmuClkDiv_16 16
	Divide clock by 16.

#define	cmuClkDiv_32 32
	Divide clock by 32.

#define	cmuClkDiv_64 64
	Divide clock by 64.

#define	cmuClkDiv_128 128
	Divide clock by 128.

#define	cmuClkDiv_256 256
	Divide clock by 256.

#define	cmuClkDiv_512 512
	Divide clock by 512.

#define	cmuClkDiv_1024 1024
	Divide clock by 1024.

#define	cmuClkDiv_2048 2048
	Divide clock by 2048.

#define	cmuClkDiv_4096 4096
	Divide clock by 4096.

#define	cmuClkDiv_8192 8192
	Divide clock by 8192.

#define	cmuClkDiv_16384 16384
	Divide clock by 16384.

#define	cmuClkDiv_32768 32768
	Divide clock by 32768.

#define	CMU_LFXOINIT_DEFAULT
	Default LFXO initialization values.

#define	CMU_LFXOINIT_EXTERNAL_CLOCK
	Default LFXO initialization for external clock.

#define	CMU_HFXOINIT_DEFAULT
	Default HFXO initialization values for Platform 1 devices.

#define	CMU_HFXOINIT_EXTERNAL_CLOCK
	Default HFXO initialization for external clock.

Typedefs
typedef uint32_t	CMU_ClkDiv_TypeDef
	Clock divider configuration.

Enumerations
enum	CMU_HFRCOBand_TypeDef { cmuHFRCOBand_1MHz = _CMU_HFRCOCTRL_BAND_1MHZ, cmuHFRCOBand_7MHz = _CMU_HFRCOCTRL_BAND_7MHZ, cmuHFRCOBand_11MHz = _CMU_HFRCOCTRL_BAND_11MHZ, cmuHFRCOBand_14MHz = _CMU_HFRCOCTRL_BAND_14MHZ, cmuHFRCOBand_21MHz = _CMU_HFRCOCTRL_BAND_21MHZ, cmuHFRCOBand_28MHz = _CMU_HFRCOCTRL_BAND_28MHZ }
	High-frequency system RCO bands.

enum	CMU_AUXHFRCOBand_TypeDef { cmuAUXHFRCOBand_1MHz = _CMU_AUXHFRCOCTRL_BAND_1MHZ, cmuAUXHFRCOBand_7MHz = _CMU_AUXHFRCOCTRL_BAND_7MHZ, cmuAUXHFRCOBand_11MHz = _CMU_AUXHFRCOCTRL_BAND_11MHZ, cmuAUXHFRCOBand_14MHz = _CMU_AUXHFRCOCTRL_BAND_14MHZ, cmuAUXHFRCOBand_21MHz = _CMU_AUXHFRCOCTRL_BAND_21MHZ, cmuAUXHFRCOBand_28MHz = _CMU_AUXHFRCOCTRL_BAND_28MHZ }
	AUX high-frequency RCO bands.

enum	CMU_Clock_TypeDef { cmuClock_HF , cmuClock_DBG , cmuClock_AUX , cmuClock_HFPER , cmuClock_USART0 , cmuClock_USART1 , cmuClock_USART2 , cmuClock_UART0 , cmuClock_UART1 , cmuClock_TIMER0 , cmuClock_TIMER1 , cmuClock_TIMER2 , cmuClock_TIMER3 , cmuClock_ACMP0 , cmuClock_ACMP1 , cmuClock_PRS , cmuClock_DAC0 , cmuClock_GPIO , cmuClock_VCMP , cmuClock_ADC0 , cmuClock_I2C0 ,

CMU - Clock Management Unit

Description

Data Structures

Functions

Macros

Typedefs

Enumerations