Detailed Description

Clock management unit (CMU) API.

Version: 5.1.2

License

Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:

The origin of this software must not be misrepresented; you must not claim that you wrote the original software.
Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
This notice may not be removed or altered from any source distribution.

DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no obligation to support this Software. Silicon Labs is providing the Software "AS IS", with no express or implied warranties of any kind, including, but not limited to, any implied warranties of merchantability or fitness for any particular purpose or warranties against infringement of any proprietary rights of a third party.

Silicon Labs will not be liable for any consequential, incidental, or special damages, or any other relief, or for any claim by any third party, arising from your use of this Software.

Definition in file em_cmu.h.

#include "em_device.h"
#include <stdbool.h>
#include "em_assert.h"
#include "em_bus.h"

Go to the source code of this file.

Data Structures
struct	CMU_HFXOInit_TypeDef

struct	CMU_LFXOInit_TypeDef

Macros
#define	CMU_HFXOINIT_DEFAULT

#define	CMU_HFXOINIT_EXTERNAL_CLOCK

#define	CMU_LFXOINIT_DEFAULT

#define	CMU_LFXOINIT_EXTERNAL_CLOCK

#define	cmuClkDiv_1 1

#define	cmuClkDiv_1024 1024

#define	cmuClkDiv_128 128

#define	cmuClkDiv_16 16

#define	cmuClkDiv_16384 16384

#define	cmuClkDiv_2 2

#define	cmuClkDiv_2048 2048

#define	cmuClkDiv_256 256

#define	cmuClkDiv_32 32

#define	cmuClkDiv_32768 32768

#define	cmuClkDiv_4 4

#define	cmuClkDiv_4096 4096

#define	cmuClkDiv_512 512

#define	cmuClkDiv_64 64

#define	cmuClkDiv_8 8

#define	cmuClkDiv_8192 8192

Typedefs
typedef uint32_t	CMU_ClkDiv_TypeDef

Enumerations
enum	CMU_Clock_TypeDef { cmuClock_HF, cmuClock_DBG, cmuClock_AUX, cmuClock_HFPER, cmuClock_USART0, cmuClock_USART1, cmuClock_USART2, cmuClock_UART0, cmuClock_TIMER0, cmuClock_TIMER1, cmuClock_TIMER2, cmuClock_ACMP0, cmuClock_ACMP1, cmuClock_PRS, cmuClock_DAC0, cmuClock_GPIO, cmuClock_VCMP, cmuClock_ADC0, cmuClock_I2C0, cmuClock_CORE, cmuClock_AES, cmuClock_DMA, cmuClock_HFLE, cmuClock_EBI, cmuClock_LFA, cmuClock_RTC, cmuClock_LETIMER0, cmuClock_LCDpre, cmuClock_LCD, cmuClock_PCNT0, cmuClock_PCNT1, cmuClock_PCNT2, cmuClock_LFB, cmuClock_LEUART0, cmuClock_LEUART1 }

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 }

enum	CMU_LFXOBoost_TypeDef { cmuLfxoBoost70 = 0x0, cmuLfxoBoost100 = 0x2 }

enum	CMU_Osc_TypeDef { cmuOsc_LFXO, cmuOsc_LFRCO, cmuOsc_HFXO, cmuOsc_HFRCO, cmuOsc_AUXHFRCO }

enum	CMU_OscMode_TypeDef { cmuOscMode_Crystal, cmuOscMode_AcCoupled, cmuOscMode_External }

enum	CMU_Select_TypeDef { cmuSelect_Error, cmuSelect_Disabled, cmuSelect_LFXO, cmuSelect_LFRCO, cmuSelect_HFXO, cmuSelect_HFRCO, cmuSelect_HFCLKLE, cmuSelect_AUXHFRCO, cmuSelect_HFCLK }

Functions
uint32_t	CMU_Calibrate (uint32_t HFCycles, CMU_Osc_TypeDef ref)
	Calibrate clock. More...

uint32_t	CMU_CalibrateCountGet (void)
	Get calibration count register. More...

__STATIC_INLINE void	CMU_CalibrateStart (void)
	Starts calibration. More...

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

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

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

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

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

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

__STATIC_INLINE uint32_t	CMU_DivToLog2 (CMU_ClkDiv_TypeDef div)
	Convert dividend to logarithmic value. Only works for even numbers equal to 2^n. More...

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

CMU_HFRCOBand_TypeDef	CMU_HFRCOBandGet (void)
	Get HFRCO band in use. More...

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. More...

uint32_t	CMU_HFRCOStartupDelayGet (void)
	Get the HFRCO startup delay. More...

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

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

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

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

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

__STATIC_INLINE uint32_t	CMU_IntGet (void)
	Get pending CMU interrupts. More...

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

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

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

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

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

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

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

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

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

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

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

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

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

Detailed Description

License

Data Structures

Macros

Typedefs

Enumerations

Functions