Detailed Description

Clock management unit (CMU) Peripheral API.

This module contains functions to control the CMU peripheral of Silicon Labs 32-bit MCUs and SoCs. The CMU controls oscillators and clocks.

Data Structures
struct	CMU_DPLLInit_TypeDef

struct	CMU_HFXOInit_TypeDef

struct	CMU_LFXOInit_TypeDef

Macros
#define	CMU_DPLL_HFXO_TO_80MHZ

#define	CMU_DPLL_LFXO_TO_40MHZ

#define	CMU_DPLLINIT_DEFAULT

#define	CMU_HFRCODPLL_MAX cmuHFRCODPLLFreq_80M0Hz

#define	CMU_HFRCODPLL_MIN cmuHFRCODPLLFreq_1M0Hz

#define	CMU_HFRCOEM23_MAX cmuHFRCOEM23Freq_40M0Hz

#define	CMU_HFRCOEM23_MIN cmuHFRCOEM23Freq_1M0Hz

#define	CMU_HFXOINIT_DEFAULT

#define	CMU_HFXOINIT_EXTERNAL_SINE

#define	CMU_LFXOINIT_DEFAULT

#define	CMU_LFXOINIT_EXTERNAL_CLOCK

#define	CMU_LFXOINIT_EXTERNAL_SINE

Typedefs
typedef uint32_t	CMU_ClkDiv_TypeDef

Enumerations
enum	CMU_Clock_TypeDef { cmuClock_SYSCLK , cmuClock_HCLK , cmuClock_EXPCLK , cmuClock_PCLK , cmuClock_LSPCLK , cmuClock_IADCCLK , cmuClock_EM01GRPACLK , cmuClock_EM23GRPACLK , cmuClock_EM4GRPACLK , cmuClock_WDOG0CLK , cmuClock_WDOG1CLK , cmuClock_DPLLREFCLK , cmuClock_TRACECLK , cmuClock_RTCCCLK , cmuClock_CORE , cmuClock_SYSTICK , cmuClock_ACMP0 , cmuClock_ACMP1 , cmuClock_BURTC , cmuClock_GPCRC , cmuClock_GPIO , cmuClock_I2C0 , cmuClock_I2C1 , cmuClock_IADC0 , cmuClock_LDMA , cmuClock_LETIMER0 , cmuClock_PRS , cmuClock_RTCC , cmuClock_TIMER0 , cmuClock_TIMER1 , cmuClock_TIMER2 , cmuClock_TIMER3 , cmuClock_USART0 , cmuClock_USART1 , cmuClock_USART2 , cmuClock_WDOG0 , cmuClock_WDOG1 , cmuClock_PDM }

enum	CMU_DPLLEdgeSel_TypeDef { cmuDPLLEdgeSel_Fall = 0, cmuDPLLEdgeSel_Rise = 1 }

enum	CMU_DPLLLockMode_TypeDef { cmuDPLLLockMode_Freq = _DPLL_CFG_MODE_FLL, cmuDPLLLockMode_Phase = _DPLL_CFG_MODE_PLL }

enum	CMU_HFRCODPLLFreq_TypeDef { cmuHFRCODPLLFreq_1M0Hz = 1000000U, cmuHFRCODPLLFreq_2M0Hz = 2000000U, cmuHFRCODPLLFreq_4M0Hz = 4000000U, cmuHFRCODPLLFreq_7M0Hz = 7000000U, cmuHFRCODPLLFreq_13M0Hz = 13000000U, cmuHFRCODPLLFreq_16M0Hz = 16000000U, cmuHFRCODPLLFreq_19M0Hz = 19000000U, cmuHFRCODPLLFreq_26M0Hz = 26000000U, cmuHFRCODPLLFreq_32M0Hz = 32000000U, cmuHFRCODPLLFreq_38M0Hz = 38000000U, cmuHFRCODPLLFreq_48M0Hz = 48000000U, cmuHFRCODPLLFreq_56M0Hz = 56000000U, cmuHFRCODPLLFreq_64M0Hz = 64000000U, cmuHFRCODPLLFreq_80M0Hz = 80000000U, cmuHFRCODPLLFreq_UserDefined = 0 }

enum	CMU_HFRCOEM23Freq_TypeDef { cmuHFRCOEM23Freq_1M0Hz = 1000000U, cmuHFRCOEM23Freq_2M0Hz = 2000000U, cmuHFRCOEM23Freq_4M0Hz = 4000000U, cmuHFRCOEM23Freq_13M0Hz = 13000000U, cmuHFRCOEM23Freq_16M0Hz = 16000000U, cmuHFRCOEM23Freq_19M0Hz = 19000000U, cmuHFRCOEM23Freq_26M0Hz = 26000000U, cmuHFRCOEM23Freq_32M0Hz = 32000000U, cmuHFRCOEM23Freq_40M0Hz = 40000000U, cmuHFRCOEM23Freq_UserDefined = 0 }

enum	CMU_HfxoCbLsbTimeout_TypeDef { cmuHfxoCbLsbTimeout_8us = _HFXO_XTALCFG_TIMEOUTCBLSB_T8US, cmuHfxoCbLsbTimeout_20us = _HFXO_XTALCFG_TIMEOUTCBLSB_T20US, cmuHfxoCbLsbTimeout_41us = _HFXO_XTALCFG_TIMEOUTCBLSB_T41US, cmuHfxoCbLsbTimeout_62us = _HFXO_XTALCFG_TIMEOUTCBLSB_T62US, cmuHfxoCbLsbTimeout_83us = _HFXO_XTALCFG_TIMEOUTCBLSB_T83US, cmuHfxoCbLsbTimeout_104us = _HFXO_XTALCFG_TIMEOUTCBLSB_T104US, cmuHfxoCbLsbTimeout_125us = _HFXO_XTALCFG_TIMEOUTCBLSB_T125US, cmuHfxoCbLsbTimeout_166us = _HFXO_XTALCFG_TIMEOUTCBLSB_T166US, cmuHfxoCbLsbTimeout_208us = _HFXO_XTALCFG_TIMEOUTCBLSB_T208US, cmuHfxoCbLsbTimeout_250us = _HFXO_XTALCFG_TIMEOUTCBLSB_T250US, cmuHfxoCbLsbTimeout_333us = _HFXO_XTALCFG_TIMEOUTCBLSB_T333US, cmuHfxoCbLsbTimeout_416us = _HFXO_XTALCFG_TIMEOUTCBLSB_T416US, cmuHfxoCbLsbTimeout_833us = _HFXO_XTALCFG_TIMEOUTCBLSB_T833US, cmuHfxoCbLsbTimeout_1250us = _HFXO_XTALCFG_TIMEOUTCBLSB_T1250US, cmuHfxoCbLsbTimeout_2083us = _HFXO_XTALCFG_TIMEOUTCBLSB_T2083US, cmuHfxoCbLsbTimeout_3750us = _HFXO_XTALCFG_TIMEOUTCBLSB_T3750US }

enum	CMU_HfxoCoreDegen_TypeDef { cmuHfxoCoreDegen_None = _HFXO_XTALCTRL_COREDGENANA_NONE, cmuHfxoCoreDegen_33 = _HFXO_XTALCTRL_COREDGENANA_DGEN33, cmuHfxoCoreDegen_50 = _HFXO_XTALCTRL_COREDGENANA_DGEN50, cmuHfxoCoreDegen_100 = _HFXO_XTALCTRL_COREDGENANA_DGEN100 }

enum	CMU_HfxoCtuneFixCap_TypeDef { cmuHfxoCtuneFixCap_None = _HFXO_XTALCTRL_CTUNEFIXANA_NONE, cmuHfxoCtuneFixCap_Xi = _HFXO_XTALCTRL_CTUNEFIXANA_XI, cmuHfxoCtuneFixCap_Xo = _HFXO_XTALCTRL_CTUNEFIXANA_XO, cmuHfxoCtuneFixCap_Both = _HFXO_XTALCTRL_CTUNEFIXANA_BOTH }

enum	CMU_HfxoOscMode_TypeDef { cmuHfxoOscMode_Crystal = _HFXO_CFG_MODE_XTAL, cmuHfxoOscMode_ExternalSine = _HFXO_CFG_MODE_EXTCLK }

enum	CMU_HfxoSteadyStateTimeout_TypeDef { cmuHfxoSteadyStateTimeout_16us = _HFXO_XTALCFG_TIMEOUTSTEADY_T16US, cmuHfxoSteadyStateTimeout_41us = _HFXO_XTALCFG_TIMEOUTSTEADY_T41US, cmuHfxoSteadyStateTimeout_83us = _HFXO_XTALCFG_TIMEOUTSTEADY_T83US, cmuHfxoSteadyStateTimeout_125us = _HFXO_XTALCFG_TIMEOUTSTEADY_T125US, cmuHfxoSteadyStateTimeout_166us = _HFXO_XTALCFG_TIMEOUTSTEADY_T166US, cmuHfxoSteadyStateTimeout_208us = _HFXO_XTALCFG_TIMEOUTSTEADY_T208US, cmuHfxoSteadyStateTimeout_250us = _HFXO_XTALCFG_TIMEOUTSTEADY_T250US, cmuHfxoSteadyStateTimeout_333us = _HFXO_XTALCFG_TIMEOUTSTEADY_T333US, cmuHfxoSteadyStateTimeout_416us = _HFXO_XTALCFG_TIMEOUTSTEADY_T416US, cmuHfxoSteadyStateTimeout_500us = _HFXO_XTALCFG_TIMEOUTSTEADY_T500US, cmuHfxoSteadyStateTimeout_666us = _HFXO_XTALCFG_TIMEOUTSTEADY_T666US, cmuHfxoSteadyStateTimeout_833us = _HFXO_XTALCFG_TIMEOUTSTEADY_T833US, cmuHfxoSteadyStateTimeout_1666us = _HFXO_XTALCFG_TIMEOUTSTEADY_T1666US, cmuHfxoSteadyStateTimeout_2500us = _HFXO_XTALCFG_TIMEOUTSTEADY_T2500US, cmuHfxoSteadyStateTimeout_4166us = _HFXO_XTALCFG_TIMEOUTSTEADY_T4166US, cmuHfxoSteadyStateTimeout_7500us = _HFXO_XTALCFG_TIMEOUTSTEADY_T7500US }

enum	CMU_LfxoOscMode_TypeDef { cmuLfxoOscMode_Crystal = _LFXO_CFG_MODE_XTAL, cmuLfxoOscMode_AcCoupledSine = _LFXO_CFG_MODE_BUFEXTCLK, cmuLfxoOscMode_External = _LFXO_CFG_MODE_DIGEXTCLK }

enum	CMU_LfxoStartupDelay_TypeDef { cmuLfxoStartupDelay_2Cycles = _LFXO_CFG_TIMEOUT_CYCLES2, cmuLfxoStartupDelay_256Cycles = _LFXO_CFG_TIMEOUT_CYCLES256, cmuLfxoStartupDelay_1KCycles = _LFXO_CFG_TIMEOUT_CYCLES1K, cmuLfxoStartupDelay_2KCycles = _LFXO_CFG_TIMEOUT_CYCLES2K, cmuLfxoStartupDelay_4KCycles = _LFXO_CFG_TIMEOUT_CYCLES4K, cmuLfxoStartupDelay_8KCycles = _LFXO_CFG_TIMEOUT_CYCLES8K, cmuLfxoStartupDelay_16KCycles = _LFXO_CFG_TIMEOUT_CYCLES16K, cmuLfxoStartupDelay_32KCycles = _LFXO_CFG_TIMEOUT_CYCLES32K }

enum	CMU_Osc_TypeDef { cmuOsc_LFXO , cmuOsc_LFRCO , cmuOsc_FSRCO , cmuOsc_HFXO , cmuOsc_HFRCODPLL , cmuOsc_HFRCOEM23 , cmuOsc_ULFRCO }

enum	CMU_Select_TypeDef { cmuSelect_Error , cmuSelect_Disabled , cmuSelect_FSRCO , cmuSelect_HFXO , cmuSelect_HFRCODPLL , cmuSelect_HFRCOEM23 , cmuSelect_CLKIN0 , cmuSelect_LFXO , cmuSelect_LFRCO , cmuSelect_ULFRCO , cmuSelect_PCLK , cmuSelect_HCLK , cmuSelect_HCLKDIV1024 , cmuSelect_EM01GRPACLK , cmuSelect_EXPCLK , cmuSelect_PRS }

Functions
uint32_t	CMU_Calibrate (uint32_t cycles, CMU_Select_TypeDef ref)
	Calibrate an oscillator.

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

__STATIC_INLINE void	CMU_CalibrateCont (bool enable)
	Configures continuous calibration mode.

uint32_t	CMU_CalibrateCountGet (void)
	Get calibration count value.

__STATIC_INLINE void	CMU_CalibrateStart (void)
	Starts calibration.

__STATIC_INLINE void	CMU_CalibrateStop (void)
	Stop calibration counters.

void	CMU_ClkOutPinConfig (uint32_t clkNo, CMU_Select_TypeDef sel, CMU_ClkDiv_TypeDef clkDiv, GPIO_Port_TypeDef port, unsigned int pin)
	Direct a clock to a GPIO pin.

CMU_ClkDiv_TypeDef	CMU_ClockDivGet ( CMU_Clock_TypeDef clock)
	Get clock divisor.

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

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

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

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

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

bool	CMU_DPLLLock (const CMU_DPLLInit_TypeDef *init)
	Lock the DPLL to a given frequency. The frequency is given by: Fout = Fref * (N+1) / (M+1).

__STATIC_INLINE void	CMU_DPLLUnlock (void)
	Unlock the DPLL.

CMU_HFRCODPLLFreq_TypeDef	CMU_HFRCODPLLBandGet (void)
	Get HFRCODPLL band in use.

void	CMU_HFRCODPLLBandSet ( CMU_HFRCODPLLFreq_TypeDef freq)
	Set HFRCODPLL band and the tuning value based on the value in the calibration table made during production.

CMU_HFRCOEM23Freq_TypeDef	CMU_HFRCOEM23BandGet (void)
	Get HFRCOEM23 band in use.

void	CMU_HFRCOEM23BandSet ( CMU_HFRCOEM23Freq_TypeDef freq)
	Set HFRCOEM23 band and the tuning value based on the value in the calibration table made during production.

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

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

__STATIC_INLINE void	CMU_IntDisable (uint32_t flags)
	Disable one or more CMU interrupt sources.

__STATIC_INLINE void	CMU_IntEnable (uint32_t flags)
	Enable one or more CMU interrupt sources.

__STATIC_INLINE uint32_t	CMU_IntGet (void)
	Get pending CMU interrupt sources.

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

__STATIC_INLINE void	CMU_IntSet (uint32_t flags)
	Set one or more pending CMU interrupt sources.

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

__STATIC_INLINE void	CMU_Lock (void)
	Lock CMU register access in order to protect registers contents against unintended modification.

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

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

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

__STATIC_INLINE void	CMU_Unlock (void)
	Unlock CMU register access so that writing to registers is possible.

void	CMU_UpdateWaitStates (uint32_t freq, int vscale)
	Configure wait state settings necessary to switch to a given core clock frequency.

__STATIC_INLINE void	CMU_WdogLock (void)
	Lock WDOG register access in order to protect registers contents against unintended modification.

__STATIC_INLINE void	CMU_WdogUnlock (void)
	Unlock WDOG register access so that writing to registers is possible.

Macro Definition Documentation

#define CMU_DPLL_HFXO_TO_80MHZ

Value:

         { \
        
         80000000,
         
          /* Target frequency. */
         
         \
        
         (4000 - 1),
         
          /* Factor N. */
         
         \
        
         (1920 - 1),
         
          /* Factor M. */
         
         \
        
         cmuSelect_HFXO,
         
          /* Select HFXO as reference clock. */
         
         \
        
         cmuDPLLEdgeSel_Fall,
         
          /* Select falling edge of ref clock. */
         
         \
        
         cmuDPLLLockMode_Freq,
         
          /* Use frequency lock mode. */
         
         \
        
         true,
         
          /* Enable automatic lock recovery. */
         
         \
        
         false
         
          /* Don't enable dither function. */
         
         \
        
         }

DPLL initialization values for 80,000,000 Hz using HFXO as reference clock, M = 1919, N = 3999.

Definition at line 455 of file em_cmu.h .

Referenced by BSP_initClocks() .

#define CMU_DPLL_LFXO_TO_40MHZ

Value:

         { \
        
         39998805,
         
          /* Target frequency. */
         
         \
        
         3661,
         
          /* Factor N. */
         
         \
        
         2,
         
          /* Factor M. */
         
         \
        
         cmuSelect_LFXO,
         
          /* Select LFXO as reference clock. */
         
         \
        
         cmuDPLLEdgeSel_Fall,
         
          /* Select falling edge of ref clock. */
         
         \
        
         cmuDPLLLockMode_Freq,
         
          /* Use frequency lock mode. */
         
         \
        
         true,
         
          /* Enable automatic lock recovery. */
         
         \
        
         false
         
          /* Don't enable dither function. */
         
         \
        
         }

DPLL initialization values for 39,998,805 Hz using LFXO as reference clock, M=2 and N=3661.

Definition at line 439 of file em_cmu.h .

Referenced by BSP_initClocks() .

#define CMU_DPLLINIT_DEFAULT

Value:

         { \
        
         80000000,
         
          /* Target frequency. */
         
         \
        
         (4000 - 1),
         
          /* Factor N. */
         
         \
        
         (1920 - 1),
         
          /* Factor M. */
         
         \
        
         cmuSelect_HFXO,
         
          /* Select HFXO as reference clock. */
         
         \
        
         cmuDPLLEdgeSel_Fall,
         
          /* Select falling edge of ref clock. */
         
         \
        
         cmuDPLLLockMode_Freq,
         
          /* Use frequency lock mode. */
         
         \
        
         true,
         
          /* Enable automatic lock recovery. */
         
         \
        
         false
         
          /* Don't enable dither function. */
         
         \
        
         }

Default configurations for DPLL initialization. When using this macro you need to modify the N and M factor and the desired frequency to match the components placed on the board.

Definition at line 472 of file em_cmu.h .

#define CMU_HFRCODPLL_MAX cmuHFRCODPLLFreq_80M0Hz

HFRCODPLL minimum frequency

Definition at line 87 of file em_cmu.h .

#define CMU_HFRCODPLL_MIN cmuHFRCODPLLFreq_1M0Hz

HFRCODPLL maximum frequency

Definition at line 85 of file em_cmu.h .

#define CMU_HFRCOEM23_MAX cmuHFRCOEM23Freq_40M0Hz

HFRCOEM23 minimum frequency

Definition at line 106 of file em_cmu.h .

#define CMU_HFRCOEM23_MIN cmuHFRCOEM23Freq_1M0Hz

HFRCOEM23 maximum frequency

Definition at line 104 of file em_cmu.h .

#define CMU_HFXOINIT_DEFAULT

Value:

         { \
        
         cmuHfxoCbLsbTimeout_416us, \
        
         cmuHfxoSteadyStateTimeout_833us,
         
          /* First lock */
         
         \
        
         cmuHfxoSteadyStateTimeout_83us,
         
          /* Subsequent locks */
         
         \
        
         0U,
         
          /* ctuneXoStartup */
         
         \
        
         0U,
         
          /* ctuneXiStartup */
         
         \
        
         32U,
         
          /* coreBiasStartup */
         
         \
        
         32U,
         
          /* imCoreBiasStartup */
         
         \
        
         cmuHfxoCoreDegen_None, \
        
         cmuHfxoCtuneFixCap_Both, \
        
         60U,
         
          /* ctuneXoAna */
         
         \
        
         60U,
         
          /* ctuneXiAna */
         
         \
        
         60U,
         
          /* coreBiasAna */
         
         \
        
         false,
         
          /* enXiDcBiasAna */
         
         \
        
         cmuHfxoOscMode_Crystal, \
        
         false,
         
          /* forceXo2GndAna */
         
         \
        
         false,
         
          /* forceXi2GndAna */
         
         \
        
         false,
         
          /* DisOndemand */
         
         \
        
         false,
         
          /* ForceEn */
         
         \
        
         false
         
          /* Lock registers */
         
         \
        
         }

Default HFXO initialization values for XTAL mode.

Definition at line 376 of file em_cmu.h .

#define CMU_HFXOINIT_EXTERNAL_SINE

Value:

         { \
        
         (
         
          CMU_HfxoCbLsbTimeout_TypeDef
         
         )0,
         
          /* timeoutCbLsb */
         
         \
        
         (
         
          CMU_HfxoSteadyStateTimeout_TypeDef
         
         )0,
         
          /* timeoutSteady, first lock */
         
         \
        
         (
         
          CMU_HfxoSteadyStateTimeout_TypeDef
         
         )0,
         
          /* timeoutSteady, subseq. locks */
         
         \
        
         0U,
         
          /* ctuneXoStartup */
         
         \
        
         0U,
         
          /* ctuneXiStartup */
         
         \
        
         0U,
         
          /* coreBiasStartup */
         
         \
        
         0U,
         
          /* imCoreBiasStartup */
         
         \
        
          cmuHfxoCoreDegen_None
         
         , \
        
          cmuHfxoCtuneFixCap_None
         
         , \
        
         0U,
         
          /* ctuneXoAna */
         
         \
        
         0U,
         
          /* ctuneXiAna */
         
         \
        
         0U,
         
          /* coreBiasAna */
         
         \
        
          false
         
         ,
         
          /* enXiDcBiasAna, false=DC true=AC coupling of signal */
         
         \
        
          cmuHfxoOscMode_ExternalSine
         
         , \
        
          false
         
         ,
         
          /* forceXo2GndAna */
         
         \
        
          false
         
         ,
         
          /* forceXi2GndAna */
         
         \
        
          false
         
         ,
         
          /* DisOndemand */
         
         \
        
          false
         
         ,
         
          /* ForceEn */
         
         \
        
          false
         
          /* Lock registers */
         
         \
        
         }

Default HFXO initialization values for external sine mode.

Definition at line 400 of file em_cmu.h .

#define CMU_LFXOINIT_DEFAULT

Value:

         { \
        
         1, \
        
         38, \
        
         cmuLfxoStartupDelay_4KCycles, \
        
         cmuLfxoOscMode_Crystal, \
        
         false,
         
          /* highAmplitudeEn */
         
         \
        
         true,
         
          /* agcEn */
         
         \
        
         false,
         
          /* failDetEM4WUEn */
         
         \
        
         false,
         
          /* failDetEn */
         
         \
        
         false,
         
          /* DisOndemand */
         
         \
        
         false,
         
          /* ForceEn */
         
         \
        
         false
         
          /* Lock registers */
         
         \
        
         }

Default LFXO initialization values for XTAL mode.

Definition at line 304 of file em_cmu.h .

#define CMU_LFXOINIT_EXTERNAL_CLOCK

Value:

         { \
        
         0U, \
        
         0U, \
        
         cmuLfxoStartupDelay_2Cycles, \
        
         cmuLfxoOscMode_External, \
        
         false,
         
          /* highAmplitudeEn */
         
         \
        
         false,
         
          /* agcEn */
         
         \
        
         false,
         
          /* failDetEM4WUEn */
         
         \
        
         false,
         
          /* failDetEn */
         
         \
        
         false,
         
          /* DisOndemand */
         
         \
        
         false,
         
          /* ForceEn */
         
         \
        
         false
         
          /* Lock registers */
         
         \
        
         }

Default LFXO initialization values for external clock mode.

Definition at line 320 of file em_cmu.h .

#define CMU_LFXOINIT_EXTERNAL_SINE

Value:

         { \
        
         0U, \
        
         0U, \
        
         cmuLfxoStartupDelay_2Cycles, \
        
         cmuLfxoOscMode_AcCoupledSine, \
        
         false,
         
          /* highAmplitudeEn */
         
         \
        
         false,
         
          /* agcEn */
         
         \
        
         false,
         
          /* failDetEM4WUEn */
         
         \
        
         false,
         
          /* failDetEn */
         
         \
        
         false,
         
          /* DisOndemand */
         
         \
        
         false,
         
          /* ForceEn */
         
         \
        
         false
         
          /* Lock registers */
         
         \
        
         }

Default LFXO initialization values for external sine mode.

Definition at line 336 of file em_cmu.h .

Typedef Documentation

typedef uint32_t CMU_ClkDiv_TypeDef

Clock divider configuration

Definition at line 63 of file em_cmu.h .

Enumeration Type Documentation

enum CMU_Clock_TypeDef

Clock points in CMU clock-tree.

Enumerator
cmuClock_SYSCLK	System clock.
cmuClock_HCLK	Core and AHB bus interface clock.
cmuClock_EXPCLK	Export clock.
cmuClock_PCLK	Peripheral APB bus interface clock.
cmuClock_LSPCLK	Low speed peripheral APB bus interface clock.
cmuClock_IADCCLK	IADC clock.
cmuClock_EM01GRPACLK	EM01GRPA clock.
cmuClock_EM23GRPACLK	EM23GRPA clock.
cmuClock_EM4GRPACLK	EM4GRPA clock.
cmuClock_WDOG0CLK	WDOG0 clock.
cmuClock_WDOG1CLK	WDOG1 clock.
cmuClock_DPLLREFCLK	DPLL reference clock.
cmuClock_TRACECLK	Debug trace clock.
cmuClock_RTCCCLK	RTCC clock.
cmuClock_CORE	Cortex-M33 core clock.
cmuClock_SYSTICK	Optional Cortex-M33 SYSTICK clock.
cmuClock_ACMP0	ACMP0 clock.
cmuClock_ACMP1	ACMP1 clock.
cmuClock_BURTC	BURTC clock.
cmuClock_GPCRC	GPCRC clock.
cmuClock_GPIO	GPIO clock.
cmuClock_I2C0	I2C0 clock.
cmuClock_I2C1	I2C1 clock.
cmuClock_IADC0	IADC clock.
cmuClock_LDMA	RTCC clock.
cmuClock_LETIMER0	LETIMER clock.
cmuClock_PRS	PRS clock.
cmuClock_RTCC	RTCC clock.
cmuClock_TIMER0	TIMER0 clock.
cmuClock_TIMER1	TIMER1 clock.
cmuClock_TIMER2	TIMER2 clock.
cmuClock_TIMER3	TIMER3 clock.
cmuClock_USART0	USART0 clock.
cmuClock_USART1	USART1 clock.
cmuClock_USART2	USART2 clock.
cmuClock_WDOG0	WDOG0 clock.
cmuClock_WDOG1	WDOG1 clock.
cmuClock_PDM	PDM clock.

Definition at line 109 of file em_cmu.h .

enum CMU_DPLLEdgeSel_TypeDef

DPLL reference clock edge detect selector.

Enumerator
cmuDPLLEdgeSel_Fall	Detect falling edge of reference clock.
cmuDPLLEdgeSel_Rise	Detect rising edge of reference clock.

Definition at line 191 of file em_cmu.h .

enum CMU_DPLLLockMode_TypeDef

DPLL lock mode selector.

Enumerator
cmuDPLLLockMode_Freq	Frequency lock mode.
cmuDPLLLockMode_Phase	Phase lock mode.

Definition at line 197 of file em_cmu.h .

enum CMU_HFRCODPLLFreq_TypeDef

HFRCODPLL frequency bands

Enumerator
cmuHFRCODPLLFreq_1M0Hz	1MHz RC band.
cmuHFRCODPLLFreq_2M0Hz	2MHz RC band.
cmuHFRCODPLLFreq_4M0Hz	4MHz RC band.
cmuHFRCODPLLFreq_7M0Hz	7MHz RC band.
cmuHFRCODPLLFreq_13M0Hz	13MHz RC band.
cmuHFRCODPLLFreq_16M0Hz	16MHz RC band.
cmuHFRCODPLLFreq_19M0Hz	19MHz RC band.
cmuHFRCODPLLFreq_26M0Hz	26MHz RC band.
cmuHFRCODPLLFreq_32M0Hz	32MHz RC band.
cmuHFRCODPLLFreq_38M0Hz	38MHz RC band.
cmuHFRCODPLLFreq_48M0Hz	48MHz RC band.
cmuHFRCODPLLFreq_56M0Hz	56MHz RC band.
cmuHFRCODPLLFreq_64M0Hz	64MHz RC band.
cmuHFRCODPLLFreq_80M0Hz	80MHz RC band.

Definition at line 66 of file em_cmu.h .

enum CMU_HFRCOEM23Freq_TypeDef

HFRCOEM23 frequency bands

Enumerator
cmuHFRCOEM23Freq_1M0Hz	1MHz RC band.
cmuHFRCOEM23Freq_2M0Hz	2MHz RC band.
cmuHFRCOEM23Freq_4M0Hz	4MHz RC band.
cmuHFRCOEM23Freq_13M0Hz	13MHz RC band.
cmuHFRCOEM23Freq_16M0Hz	16MHz RC band.
cmuHFRCOEM23Freq_19M0Hz	19MHz RC band.
cmuHFRCOEM23Freq_26M0Hz	26MHz RC band.
cmuHFRCOEM23Freq_32M0Hz	32MHz RC band.
cmuHFRCOEM23Freq_40M0Hz	40MHz RC band.

Definition at line 90 of file em_cmu.h .

enum CMU_HfxoCbLsbTimeout_TypeDef

HFXO core bias LSB change timeout.

Enumerator
cmuHfxoCbLsbTimeout_8us	8 us timeout.
cmuHfxoCbLsbTimeout_20us	20 us timeout.
cmuHfxoCbLsbTimeout_41us	41 us timeout.
cmuHfxoCbLsbTimeout_62us	62 us timeout.
cmuHfxoCbLsbTimeout_83us	83 us timeout.
cmuHfxoCbLsbTimeout_104us	104 us timeout.
cmuHfxoCbLsbTimeout_125us	125 us timeout.
cmuHfxoCbLsbTimeout_166us	166 us timeout.
cmuHfxoCbLsbTimeout_208us	208 us timeout.
cmuHfxoCbLsbTimeout_250us	250 us timeout.
cmuHfxoCbLsbTimeout_333us	333 us timeout.
cmuHfxoCbLsbTimeout_416us	416 us timeout.
cmuHfxoCbLsbTimeout_833us	833 us timeout.
cmuHfxoCbLsbTimeout_1250us	1250 us timeout.
cmuHfxoCbLsbTimeout_2083us	2083 us timeout.
cmuHfxoCbLsbTimeout_3750us	3750 us timeout.

Definition at line 228 of file em_cmu.h .

enum CMU_HfxoCoreDegen_TypeDef

HFXO core degeneration control.

Enumerator
cmuHfxoCoreDegen_None	No core degeneration.
cmuHfxoCoreDegen_33	Core degeneration control 33.
cmuHfxoCoreDegen_50	Core degeneration control 50.
cmuHfxoCoreDegen_100	Core degeneration control 100.

Definition at line 268 of file em_cmu.h .

enum CMU_HfxoCtuneFixCap_TypeDef

HFXO XI and XO pin fixed capacitor control.

Enumerator
cmuHfxoCtuneFixCap_None	No fixed capacitors.
cmuHfxoCtuneFixCap_Xi	Fixed capacitor on XI pin.
cmuHfxoCtuneFixCap_Xo	Fixed capacitor on XO pin.
cmuHfxoCtuneFixCap_Both	Fixed capacitor on both pins.

Definition at line 276 of file em_cmu.h .

enum CMU_HfxoOscMode_TypeDef

HFXO oscillator modes.

Enumerator
cmuHfxoOscMode_Crystal	Crystal oscillator.
cmuHfxoOscMode_ExternalSine	External digital clock.

Definition at line 222 of file em_cmu.h .

enum CMU_HfxoSteadyStateTimeout_TypeDef

HFXO steady state timeout.

Enumerator
cmuHfxoSteadyStateTimeout_16us	16 us timeout.
cmuHfxoSteadyStateTimeout_41us	41 us timeout.
cmuHfxoSteadyStateTimeout_83us	83 us timeout.
cmuHfxoSteadyStateTimeout_125us	125 us timeout.
cmuHfxoSteadyStateTimeout_166us	166 us timeout.
cmuHfxoSteadyStateTimeout_208us	208 us timeout.
cmuHfxoSteadyStateTimeout_250us	250 us timeout.
cmuHfxoSteadyStateTimeout_333us	333 us timeout.
cmuHfxoSteadyStateTimeout_416us	416 us timeout.
cmuHfxoSteadyStateTimeout_500us	500 us timeout.
cmuHfxoSteadyStateTimeout_666us	666 us timeout.
cmuHfxoSteadyStateTimeout_833us	833 us timeout.
cmuHfxoSteadyStateTimeout_1666us	1666 us timeout.
cmuHfxoSteadyStateTimeout_2500us	2500 us timeout.
cmuHfxoSteadyStateTimeout_4166us	4166 us timeout.
cmuHfxoSteadyStateTimeout_7500us	7500 us timeout.

Definition at line 248 of file em_cmu.h .

enum CMU_LfxoOscMode_TypeDef

LFXO oscillator modes.

Enumerator
cmuLfxoOscMode_Crystal	Crystal oscillator.
cmuLfxoOscMode_AcCoupledSine	External AC coupled sine.
cmuLfxoOscMode_External	External digital clock.

Definition at line 203 of file em_cmu.h .

enum CMU_LfxoStartupDelay_TypeDef

LFXO start-up timeout delay.

Enumerator
cmuLfxoStartupDelay_2Cycles	2 cycles start-up delay.
cmuLfxoStartupDelay_256Cycles	256 cycles start-up delay.
cmuLfxoStartupDelay_1KCycles	1K cycles start-up delay.
cmuLfxoStartupDelay_2KCycles	2K cycles start-up delay.
cmuLfxoStartupDelay_4KCycles	4K cycles start-up delay.
cmuLfxoStartupDelay_8KCycles	8K cycles start-up delay.
cmuLfxoStartupDelay_16KCycles	16K cycles start-up delay.
cmuLfxoStartupDelay_32KCycles	32K cycles start-up delay.

Definition at line 210 of file em_cmu.h .

enum CMU_Osc_TypeDef

Oscillator types.

Enumerator
cmuOsc_LFXO	Low frequency crystal oscillator.
cmuOsc_LFRCO	Low frequency RC oscillator.
cmuOsc_FSRCO	Fast startup fixed frequency RC oscillator.
cmuOsc_HFXO	High frequency crystal oscillator.
cmuOsc_HFRCODPLL	High frequency RC and DPLL oscillator.
cmuOsc_HFRCOEM23	High frequency deep sleep RC oscillator.
cmuOsc_ULFRCO	Ultra low frequency RC oscillator.

Definition at line 160 of file em_cmu.h .

enum CMU_Select_TypeDef

Selectable clock sources.

Enumerator
cmuSelect_Error	Usage error.
cmuSelect_Disabled	Clock selector disabled.
cmuSelect_FSRCO	Fast startup fixed frequency RC oscillator.
cmuSelect_HFXO	High frequency crystal oscillator.
cmuSelect_HFRCODPLL	High frequency RC and DPLL oscillator.
cmuSelect_HFRCOEM23	High frequency deep sleep RC oscillator.
cmuSelect_CLKIN0	External clock input.
cmuSelect_LFXO	Low frequency crystal oscillator.
cmuSelect_LFRCO	Low frequency RC oscillator.
cmuSelect_ULFRCO	Ultra low frequency RC oscillator.
cmuSelect_PCLK	Peripheral APB bus interface clock.
cmuSelect_HCLK	Core and AHB bus interface clock.
cmuSelect_HCLKDIV1024	Prescaled HCLK frequency clock.
cmuSelect_EM01GRPACLK	EM01GRPA clock.
cmuSelect_EXPCLK	Pin export clock.
cmuSelect_PRS	PRS input as clock.

Definition at line 171 of file em_cmu.h .

Function Documentation

uint32_t CMU_Calibrate	(	uint32_t	`cycles,`
		CMU_Select_TypeDef	`ref`
	)

Calibrate an oscillator.

Run a calibration of a selectable reference clock againt HCLK. Please refer to the reference manual, CMU chapter, for further details.

Note: This function will not return until calibration measurement is completed.

Parameters

[in]	`cycles`	The number of HCLK cycles to run calibration. Increasing this number increases precision, but the calibration will take more time.
[in]	`ref`	The reference clock used to compare against HCLK.

Returns: The number of ticks the selected reference clock ticked while running cycles ticks of the HCLK clock.

Definition at line 173 of file em_cmu.c .

References _CMU_CALCTRL_CALTOP_MASK , _CMU_CALCTRL_CALTOP_SHIFT , CMU_CalibrateConfig() , CMU_CalibrateCountGet() , CMU_CalibrateStart() , and cmuSelect_HCLK .

void CMU_CalibrateConfig	(	uint32_t	`downCycles,`
		CMU_Select_TypeDef	`downSel,`
		CMU_Select_TypeDef	`upSel`
	)

Configure clock calibration.

Configure a calibration for a selectable clock source against another selectable reference clock. Refer to the reference manual, CMU chapter, for further details.

Note: After configuration, a call to CMU_CalibrateStart() is required, and the resulting calibration value can be read with the CMU_CalibrateCountGet() function call.

Parameters

[in]	`downCycles`	The number of downSel clock cycles to run calibration. Increasing this number increases precision, but the calibration will take more time.
[in]	`downSel`	The clock which will be counted down downCycles cycles.
[in]	`upSel`	The reference clock, the number of cycles generated by this clock will be counted and added up, the result can be given with the CMU_CalibrateCountGet() function call.

Definition at line 210 of file em_cmu.c .

Referenced by CMU_Calibrate() .

__STATIC_INLINE void CMU_CalibrateCont ( bool enable )

Configures continuous calibration mode.

Parameters

[in] enable If true, enables continuous calibration, if false disables continuous calibration.

Definition at line 524 of file em_cmu.h .

References _CMU_CALCTRL_CONT_SHIFT , BUS_RegBitWrite() , and CMU .

uint32_t CMU_CalibrateCountGet ( void )

Get calibration count value.

Note: If continuous calibrartion mode is active, calibration busy will almost always be off, and we just need to read the value, where the normal case would be that this function call has been triggered by the CALRDY interrupt flag.

Returns: Calibration count, the number of UPSEL clocks (see CMU_CalibrateConfig() ) in the period of DOWNSEL oscillator clock cycles configured by a previous write operation to CMU->CALCNT.

Definition at line 330 of file em_cmu.c .

References CMU , CMU_CALCTRL_CONT , and CMU_STATUS_CALRDY .

Referenced by CMU_Calibrate() .

__STATIC_INLINE void CMU_CalibrateStart ( void )

Starts calibration.

Note: This call is usually invoked after CMU_CalibrateConfig() and possibly CMU_CalibrateCont() .

Definition at line 536 of file em_cmu.h .

References CMU , and CMU_CALCMD_CALSTART .

Referenced by CMU_Calibrate() .

void CMU_ClkOutPinConfig	(	uint32_t	`clkNo,`
		CMU_Select_TypeDef	`sel,`
		CMU_ClkDiv_TypeDef	`clkDiv,`
		GPIO_Port_TypeDef	`port,`
		unsigned int	`pin`
	)

Direct a clock to a GPIO pin.

Parameters

[in]	`clkNo`	Selects between CLKOUT0, CLKOUT1 or CLKOUT2 outputs. Use values 0,1or 2.
[in]	`sel`	Select clock source.
[in]	`clkDiv`	Select a clock divisor (1..32). Only applicable when cmuSelect_EXPCLK is slexted as clock source.
[in]	`port`	GPIO port.
[in]	`pin`	GPIO pin.

Note: Refer to the reference manual and the datasheet for details on which GPIO port/pins that are available.

Definition at line 365 of file em_cmu.c .

CMU_ClkDiv_TypeDef CMU_ClockDivGet ( CMU_Clock_TypeDef clock )

Get clock divisor.

Parameters

[in] clock Clock point to get divisor for. Notice that not all clock points have a divisors. Please refer to CMU overview in reference manual.

Returns: The current clock point divisor. 1 is returned if clock specifies a clock point without divisor.

Definition at line 466 of file em_cmu.c .

References _CMU_EXPORTCLKCTRL_PRESC_MASK , _CMU_EXPORTCLKCTRL_PRESC_SHIFT , _CMU_SYSCLKCTRL_HCLKPRESC_MASK , _CMU_SYSCLKCTRL_HCLKPRESC_SHIFT , _CMU_SYSCLKCTRL_PCLKPRESC_MASK , _CMU_SYSCLKCTRL_PCLKPRESC_SHIFT , CMU , cmuClock_CORE , cmuClock_EXPCLK , cmuClock_HCLK , and cmuClock_PCLK .

Referenced by CMU_ClockFreqGet() , CMU_DPLLLock() , and UDELAY_Calibrate() .

void CMU_ClockDivSet	(	CMU_Clock_TypeDef	`clock,`
		CMU_ClkDiv_TypeDef	`div`
	)

Set clock divisor.

Parameters

[in]	`clock`	Clock point to set divisor for. Notice that not all clock points have a divisor, please refer to CMU overview in the reference manual.
[in]	`div`	The clock divisor to use.

Definition at line 509 of file em_cmu.c .

References _CMU_EXPORTCLKCTRL_PRESC_MASK , _CMU_EXPORTCLKCTRL_PRESC_SHIFT , _CMU_SYSCLKCTRL_HCLKPRESC_MASK , _CMU_SYSCLKCTRL_HCLKPRESC_SHIFT , _CMU_SYSCLKCTRL_PCLKPRESC_MASK , _CMU_SYSCLKCTRL_PCLKPRESC_SHIFT , CMU , CMU_UpdateWaitStates() , cmuClock_CORE , cmuClock_EXPCLK , cmuClock_HCLK , cmuClock_PCLK , and SystemCoreClockGet() .

Referenced by CAPLESENSE_setupCMU() , CMU_DPLLLock() , RETARGET_SerialInit() , RTCDRV_Init() , SegmentLCD_Init() , and UDELAY_Calibrate() .

__STATIC_INLINE void CMU_ClockEnable	(	CMU_Clock_TypeDef	`clock,`
		bool	`enable`
	)

Enable/disable a clock.

Note: This is a dummy function to solve backward compatibility issues.

Parameters

[in]	`clock`	The clock to enable/disable.
[in]	`enable`	true - enable specified clock. false - disable specified clock.

Definition at line 564 of file em_cmu.h .

Referenced by adcInit() , BOARD_init() , BSP_BccDeInit() , BSP_BccInit() , BSP_BusControlModeSet() , BSP_EbiInit() , BSP_initBoard() , BSP_McuBoard_Init() , CAPLESENSE_setupCMU() , CAPSENSE_Init() , DMADRV_DeInit() , ezradio_hal_GpioInit() , gpioInit() , I2CSPM_Init() , ICM20648_spiInit() , initEbiCommon() , initGpio() , LDMA_DeInit() , LDMA_Init() , MIC_init() , MICROSD_Init() , MICROSD_PowerOff() , MICROSD_PowerOn() , mscEccReadWriteExistingDma() , MSDD_Init() , RETARGET_SerialInit() , RTCDRV_DeInit() , RTCDRV_Init() , SegmentLCD_Disable() , SegmentLCD_Init() , SPI_TFT_Init() , SPIDRV_DeInit() , SPIDRV_Init() , TOUCH_Init() , UARTDRV_DeInit() , UARTDRV_InitUart() , UDELAY_Calibrate() , USTIMER_DeInit() , USTIMER_Init() , VDDCHECK_Disable() , and VDDCHECK_Init() .

uint32_t CMU_ClockFreqGet ( CMU_Clock_TypeDef clock )

Get clock frequency for a clock point.

Parameters

[in] clock Clock point to fetch frequency for.

Returns: The current frequency in Hz.

Definition at line 559 of file em_cmu.c .

References CMU_ClockDivGet() , cmuClock_BURTC , cmuClock_CORE , cmuClock_DPLLREFCLK , cmuClock_EM01GRPACLK , cmuClock_EM23GRPACLK , cmuClock_EM4GRPACLK , cmuClock_EXPCLK , cmuClock_GPCRC , cmuClock_GPIO , cmuClock_HCLK , cmuClock_I2C0 , cmuClock_I2C1 , cmuClock_IADC0 , cmuClock_IADCCLK , cmuClock_LDMA , cmuClock_LETIMER0 , cmuClock_LSPCLK , cmuClock_PCLK , cmuClock_PRS , cmuClock_RTCC , cmuClock_RTCCCLK , cmuClock_SYSCLK , cmuClock_SYSTICK , cmuClock_TIMER0 , cmuClock_TIMER1 , cmuClock_TIMER2 , cmuClock_TIMER3 , cmuClock_TRACECLK , cmuClock_USART0 , cmuClock_USART1 , cmuClock_USART2 , cmuClock_WDOG0 , cmuClock_WDOG0CLK , cmuClock_WDOG1 , cmuClock_WDOG1CLK , SystemHCLKGet() , and SystemSYSCLKGet() .

Referenced by BSP_TraceProfilerSetup() , I2C_BusFreqGet() , I2C_BusFreqSet() , IADC_calcAdcClkPrescale() , IADC_calcSrcClkPrescale() , IADC_calcTimebase() , MIC_init() , USART_BaudrateAsyncSet() , USART_BaudrateGet() , USART_BaudrateSyncSet() , USTIMER_Init() , and UTIL_init() .

CMU_Select_TypeDef CMU_ClockSelectGet ( CMU_Clock_TypeDef clock )

Get currently selected reference clock used for a clock branch.

Parameters

[in] clock Clock branch to fetch selected ref. clock for.

Returns: Reference clock used for clocking selected branch, cmuSelect_Error if invalid clock provided.

Definition at line 659 of file em_cmu.c .

References _CMU_SYSCLKCTRL_CLKSEL_CLKIN0 , _CMU_SYSCLKCTRL_CLKSEL_FSRCO , _CMU_SYSCLKCTRL_CLKSEL_HFRCODPLL , _CMU_SYSCLKCTRL_CLKSEL_HFXO , _CMU_SYSCLKCTRL_CLKSEL_MASK , CMU , cmuClock_BURTC , cmuClock_DPLLREFCLK , cmuClock_EM01GRPACLK , cmuClock_EM23GRPACLK , cmuClock_EM4GRPACLK , cmuClock_IADC0 , cmuClock_IADCCLK , cmuClock_LETIMER0 , cmuClock_RTCC , cmuClock_RTCCCLK , cmuClock_SYSCLK , cmuClock_SYSTICK , cmuClock_TIMER0 , cmuClock_TIMER1 , cmuClock_TIMER2 , cmuClock_TIMER3 , cmuClock_TRACECLK , cmuClock_WDOG0 , cmuClock_WDOG0CLK , cmuClock_WDOG1 , cmuClock_WDOG1CLK , cmuSelect_CLKIN0 , cmuSelect_Error , cmuSelect_FSRCO , cmuSelect_HFRCODPLL , and cmuSelect_HFXO .

Referenced by CMU_DPLLLock() , CMU_HFRCODPLLBandSet() , CMU_HFXOInit() , and UDELAY_Calibrate() .

void CMU_ClockSelectSet	(	CMU_Clock_TypeDef	`clock,`
		CMU_Select_TypeDef	`ref`
	)

Select reference clock/oscillator used for a clock branch.

Parameters

[in]	`clock`	Clock branch to select reference clock for.
[in]	`ref`	Reference selected for clocking, please refer to reference manual for for details on which reference is available for a specific clock branch.

Definition at line 765 of file em_cmu.c .

Referenced by BSP_BccInit() , BSP_initClocks() , CAPLESENSE_setupCMU() , CMU_DPLLLock() , MIC_init() , RETARGET_SerialInit() , RTCDRV_Init() , SegmentLCD_Init() , and UDELAY_Calibrate() .

bool CMU_DPLLLock ( const CMU_DPLLInit_TypeDef * init )

Lock the DPLL to a given frequency. The frequency is given by: Fout = Fref * (N+1) / (M+1).

Note: This function does not check if the given N & M values will actually produce the desired target frequency.
N & M limitations:
300 < N <= 4095
0 <= M <= 4095
Any peripheral running off HFRCODPLL should be switched to a lower frequency clock (if possible) prior to calling this function to avoid over-clocking.

Parameters

[in] init DPLL setup parameter struct.

Returns: Returns false on invalid target frequency or DPLL locking error.

Definition at line 1081 of file em_cmu.c .

Referenced by BSP_initClocks() .

__STATIC_INLINE void CMU_DPLLUnlock ( void )

Unlock the DPLL.

Note: The HFRCODPLL oscillator is not turned off.

Definition at line 576 of file em_cmu.h .

References DPLL0 , and DPLL_EN_EN .

CMU_HFRCODPLLFreq_TypeDef CMU_HFRCODPLLBandGet ( void )

Get HFRCODPLL band in use.

Returns: HFRCODPLL band in use.

Definition at line 1191 of file em_cmu.c .

References SystemHFRCODPLLClockGet() .

void CMU_HFRCODPLLBandSet ( CMU_HFRCODPLLFreq_TypeDef freq )

Set HFRCODPLL band and the tuning value based on the value in the calibration table made during production.

Parameters

[in] freq HFRCODPLL frequency band to activate.

Definition at line 1204 of file em_cmu.c .

References _HFRCO_CAL_CLKDIV_MASK , CMU_ClockSelectGet() , CMU_UpdateWaitStates() , cmuClock_SYSCLK , cmuHFRCODPLLFreq_1M0Hz , cmuHFRCODPLLFreq_2M0Hz , cmuSelect_HFRCODPLL , DPLL0 , DPLL_EN_EN , DPLL_STATUS_ENS , DPLL_STATUS_RDY , HFRCO0 , HFRCO_CAL_CLKDIV_DIV2 , HFRCO_CAL_CLKDIV_DIV4 , SystemCoreClockGet() , and SystemHFRCODPLLClockSet() .

CMU_HFRCOEM23Freq_TypeDef CMU_HFRCOEM23BandGet ( void )

Get HFRCOEM23 band in use.

Returns: HFRCOEM23 band in use.

Definition at line 1264 of file em_cmu.c .

References SystemHFRCOEM23ClockGet() .

void CMU_HFRCOEM23BandSet ( CMU_HFRCOEM23Freq_TypeDef freq )

Set HFRCOEM23 band and the tuning value based on the value in the calibration table made during production.

Parameters

[in] freq HFRCOEM23 frequency band to activate.

Definition at line 1277 of file em_cmu.c .

References _HFRCO_CAL_CLKDIV_MASK , cmuHFRCOEM23Freq_1M0Hz , cmuHFRCOEM23Freq_2M0Hz , HFRCO_CAL_CLKDIV_DIV2 , HFRCO_CAL_CLKDIV_DIV4 , and HFRCOEM23 .

void CMU_HFXOInit ( const CMU_HFXOInit_TypeDef * hfxoInit )

Initialize all HFXO control registers.

Note: HFXO configuration should be obtained from a configuration tool, app note or xtal datasheet. This function returns early if HFXO is already selected as SYSCLK.

Parameters

[in] hfxoInit HFXO setup parameters.

Definition at line 1316 of file em_cmu.c .

Referenced by BSP_initClocks() .

__STATIC_INLINE void CMU_IntClear ( uint32_t flags )

Clear one or more pending CMU interrupt flags.

Parameters

[in] flags CMU interrupt sources to clear.

Definition at line 588 of file em_cmu.h .

References CMU .

__STATIC_INLINE void CMU_IntDisable ( uint32_t flags )

Disable one or more CMU interrupt sources.

Parameters

[in] flags CMU interrupt sources to disable.

Definition at line 600 of file em_cmu.h .

References CMU .

__STATIC_INLINE void CMU_IntEnable ( uint32_t flags )

Enable one or more CMU interrupt sources.

Note: Depending on the use, a pending interrupt may already be set prior to enabling the interrupt. Consider using CMU_IntClear() prior to enabling if such a pending interrupt should be ignored.

Parameters

[in] flags CMU interrupt sources to enable.

Definition at line 617 of file em_cmu.h .

References CMU .

__STATIC_INLINE uint32_t CMU_IntGet ( void )

Get pending CMU interrupt sources.

Returns: CMU interrupt sources pending.

Definition at line 629 of file em_cmu.h .

References CMU .

__STATIC_INLINE uint32_t CMU_IntGetEnabled ( void )

Get enabled and pending CMU interrupt flags.

Useful for handling more interrupt sources in the same interrupt handler.

Note: The event bits are not cleared by the use of this function.

Returns

Pending and enabled CMU interrupt sources. The return value is the bitwise AND of

the enabled interrupt sources in CMU_IEN and
the pending interrupt flags CMU_IF

Definition at line 650 of file em_cmu.h .

References CMU .

__STATIC_INLINE void CMU_IntSet ( uint32_t flags )

Set one or more pending CMU interrupt sources.

Parameters

[in] flags CMU interrupt sources to set to pending.

Definition at line 665 of file em_cmu.h .

References CMU .

void CMU_LFXOInit ( const CMU_LFXOInit_TypeDef * lfxoInit )

Initialize LFXO control registers.

Note: LFXO configuration should be obtained from a configuration tool, app note or xtal datasheet. This function disables the LFXO to ensure a valid state before update.

Parameters

[in] lfxoInit LFXO setup parameters

Definition at line 1457 of file em_cmu.c .

Referenced by BSP_initClocks() .

__STATIC_INLINE void CMU_Lock ( void )

Lock CMU register access in order to protect registers contents against unintended modification.

Please refer to the reference manual for CMU registers that will be locked.

Note: If locking the CMU registers, they must be unlocked prior to using any CMU API functions modifying CMU registers protected by the lock.

Definition at line 683 of file em_cmu.h .

References CMU , and CMU_LOCK_LOCKKEY_UNLOCK .

Referenced by EMU_EnterEM3() .

__STATIC_INLINE void CMU_OscillatorEnable	(	CMU_Osc_TypeDef	`osc,`
		bool	`enable,`
		bool	`wait`
	)

Enable/disable oscillator.

Note: This is a dummy function to solve backward compatibility issues.

Parameters

[in]	`osc`	The oscillator to enable/disable.
[in]	`enable`	true - enable specified oscillator. false - disable specified oscillator.
[in]	`wait`	Only used if `enable` is true. true - wait for oscillator start-up time to timeout before returning. false - do not wait for oscillator start-up time to timeout before returning.

Definition at line 708 of file em_cmu.h .

Referenced by BSP_initClocks() , DBG_SWOEnable() , and UDELAY_Calibrate() .

uint32_t CMU_OscillatorTuningGet ( CMU_Osc_TypeDef osc )

Get oscillator frequency tuning setting.

Parameters

[in] osc Oscillator to get tuning value for.

Returns: The oscillator frequency tuning setting in use.

Definition at line 1509 of file em_cmu.c .

References _HFRCO_CAL_TUNING_MASK , _HFRCO_CAL_TUNING_SHIFT , _LFRCO_CAL_FREQTRIM_MASK , _LFRCO_CAL_FREQTRIM_SHIFT , cmuOsc_HFRCODPLL , cmuOsc_HFRCOEM23 , cmuOsc_LFRCO , HFRCO0 , HFRCOEM23 , and LFRCO .

void CMU_OscillatorTuningSet	(	CMU_Osc_TypeDef	`osc,`
		uint32_t	`val`
	)

Set the oscillator frequency tuning control.

Note: Oscillator tuning is done during production, and the tuning value is automatically loaded after a reset. Changing the tuning value from the calibrated value is for more advanced use. Certain oscillators also have build-in tuning optimization.

Parameters

[in]	`osc`	Oscillator to set tuning value for.
[in]	`val`	The oscillator frequency tuning setting to use.

Definition at line 1552 of file em_cmu.c .

References _HFRCO_CAL_TUNING_MASK , _HFRCO_CAL_TUNING_SHIFT , _LFRCO_CAL_FREQTRIM_MASK , _LFRCO_CAL_FREQTRIM_SHIFT , cmuOsc_HFRCODPLL , cmuOsc_HFRCOEM23 , cmuOsc_LFRCO , HFRCO0 , HFRCO_STATUS_SYNCBUSY , HFRCOEM23 , and LFRCO .

void CMU_UpdateWaitStates	(	uint32_t	`freq,`
		int	`vscale`
	)

Configure wait state settings necessary to switch to a given core clock frequency.

This function will setup the necessary flash and RAM wait states. Updating the wait state configuration must be done before increasing the clock frequency, and it must be done after decreasing the clock frequency.

Parameters

[in] freq Core clock frequency to configure wait-states for.

Definition at line 1601 of file em_cmu.c .

Referenced by CMU_ClockDivSet() , CMU_ClockSelectSet() , CMU_DPLLLock() , and CMU_HFRCODPLLBandSet() .

__STATIC_INLINE void CMU_WdogLock ( void )

Lock WDOG register access in order to protect registers contents against unintended modification.

Note: If locking the WDOG registers, they must be unlocked prior to using any emlib API functions modifying registers protected by the lock.

Definition at line 735 of file em_cmu.h .

References CMU , and CMU_WDOGLOCK_LOCKKEY_UNLOCK .

CMUEMLIB

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