Hardware access layer for managing the Low Frequency 32 KHz RC Oscillator (LFRC). More...

Data Structures
struct	nrf_lfrc_config_t
	LFRC override configuration. More...

Macros
#define	NRF_LFRC_HAS_DOUBLE_TAIL_CURRENT 1
	Symbol indicating whether double tail current is present.

#define	NRF_LFRC_HAS_CONTINUOUS_TAIL_BIAS 1
	Symbol indicating whether continuous tail bias is present.

#define	NRF_LFRC_HAS_RETENTION 1
	Symbol indicating whether CAL retention is present.

#define	NRF_LFRC_HAS_CFG_SPARE 1
	Symbol indicating whether spare general purpose configuration is present.

#define	NRF_LFRC_HAS_INTPEND 1
	Symbol indicating whether INTPEND register is present.

#define	NRF_LFRC_HAS_CALIBRATION 1
	Symbol indicating whether the Low Frequency Clock calibration is present.

#define	NRF_LFRC_HAS_PWRUPCTRL 1
	Symbol indicating whether the PWRUPCTRL register is present.

#define	NRF_LFRC_HAS_STATUSTRIM 1
	Symbol indicating whether the STATUSTRIM register is present.

#define	NRF_LFRC_HAS_STATUSANA 1
	Symbol indicating whether the STATUSANA register is present.

#define	NRF_LFRC_HAS_CONFIG_CFG 1
	Symbol indicating whether the CONFIG.CFG register is present.

#define	NRF_LFRC_HAS_CAL_TRIMLIMITLO 1
	Symbol indicating whether the CAL.TRIMLIMITLO register is present.

#define	NRF_LFRC_HAS_CAL_TRIMLIMITHI 1
	Symbol indicating whether the CAL.TRIMLIMITHI register is present.

#define	NRF_LFRC_HAS_CAL_RESULT 1
	Symbol indicating whether the CAL.RESULT register is present.

#define	NRF_LFRC_HAS_CAL_LENGTH 1
	Symbol indicating whether the CAL.LENGTH register is present.

#define	NRF_LFRC_HAS_CAL_NHI 1
	Symbol indicating whether the CAL.NHI register is present.

#define	NRF_LFRC_HAS_CKSYNSTARTED_EVENT 1
	Symbol indicating whether the CKSYNSTARTED event is present.

#define	NRF_LFRC_HAS_CKLFRCSTARTED_EVENT 1
	Symbol indicating whether the CKLFRCSTARTED event is present.

Enumerations
enum	nrf_lfrc_task_t { NRF_LFRC_TASK_CAL = offsetof(NRF_LFRC_Type, TASKS_CAL) , NRF_LFRC_TASK_CANCELCAL = offsetof(NRF_LFRC_Type, TASKS_CANCELCAL) }
	LFRC tasks. More...

enum	nrf_lfrc_event_t { NRF_LFRC_EVENT_CALDONE = offsetof(NRF_LFRC_Type, EVENTS_CALDONE) , NRF_LFRC_EVENT_TRIMDONE = offsetof(NRF_LFRC_Type, EVENTS_TRIMDONE) , NRF_LFRC_EVENT_TRIMERROR = offsetof(NRF_LFRC_Type, EVENTS_TRIMERROR) , NRF_LFRC_EVENT_CKSYNSTARTED = offsetof(NRF_LFRC_Type, EVENTS_CKSYNSTARTED) , NRF_LFRC_EVENT_CKLFRCSTARTED = offsetof(NRF_LFRC_Type, EVENTS_CKLFRCSTARTED) }
	LFRC events. More...

enum	nrf_lfrc_int_mask_t { NRF_LFRC_INT_CALDONE_MASK = LFRC_INTENSET_CALDONE_Msk , NRF_LFRC_INT_TRIMDONE_MASK = LFRC_INTENSET_TRIMDONE_Msk , NRF_LFRC_INT_TRIMERROR_MASK = LFRC_INTENSET_TRIMERROR_Msk , NRF_LFRC_INT_CKSYNSTARTED_MASK = LFRC_INTENSET_CKSYNSTARTED_Msk , NRF_LFRC_INT_CKLFRCSTARTED_MASK = LFRC_INTENSET_CKLFRCSTARTED_Msk }
	LFRC interrupts. More...

enum	nrf_lfrc_cal_cycle_length_t { NRF_LFRC_CAL_CYCLE_LENGTH_64 = LFRC_CAL_LENGTH_LENGTH_N64 , NRF_LFRC_CAL_CYCLE_LENGTH_128 = LFRC_CAL_LENGTH_LENGTH_N128 , NRF_LFRC_CAL_CYCLE_LENGTH_256 = LFRC_CAL_LENGTH_LENGTH_N256 , NRF_LFRC_CAL_CYCLE_LENGTH_512 = LFRC_CAL_LENGTH_LENGTH_N512 }
	Number of measurement cycles used during calibration. More...

enum	nrf_lfrc_power_control_t { NRF_LFRC_POWER_CONTROL_AUTO = LFRC_PWRUPCTRL_CTRL_Auto , NRF_LFRC_POWER_CONTROL_POWER_UP = LFRC_PWRUPCTRL_CTRL_PowerUp , NRF_LFRC_POWER_CONTROL_POWER_DOWN = LFRC_PWRUPCTRL_CTRL_PowerDown }
	Power up control. More...

Functions
NRF_STATIC_INLINE uint32_t	nrf_lfrc_task_address_get (NRF_LFRC_Type const *p_reg, nrf_lfrc_task_t task)
	Function for retrieving the address of the specified task.

NRF_STATIC_INLINE void	nrf_lfrc_task_trigger (NRF_LFRC_Type *p_reg, nrf_lfrc_task_t task)
	Function for setting the specified task.

NRF_STATIC_INLINE uint32_t	nrf_lfrc_event_address_get (NRF_LFRC_Type const *p_reg, nrf_lfrc_event_t event)
	Function for retrieving the address of the specified event.

NRF_STATIC_INLINE void	nrf_lfrc_event_clear (NRF_LFRC_Type *p_reg, nrf_lfrc_event_t event)
	Function for clearing the specified event.

NRF_STATIC_INLINE bool	nrf_lfrc_event_check (NRF_LFRC_Type const *p_reg, nrf_lfrc_event_t event)
	Function for retrieving the state of the specified event.

NRF_STATIC_INLINE void	nrf_lfrc_int_enable (NRF_LFRC_Type *p_reg, uint32_t mask)
	Function for enabling the specified interrupt.

NRF_STATIC_INLINE void	nrf_lfrc_int_disable (NRF_LFRC_Type *p_reg, uint32_t mask)
	Function for disabling the specified interrupt.

NRF_STATIC_INLINE uint32_t	nrf_lfrc_int_enable_check (NRF_LFRC_Type const *p_reg, uint32_t mask)
	Function for checking if the specified interrupts are enabled.

NRF_STATIC_INLINE uint32_t	nrf_lfrc_int_pending_get (NRF_LFRC_Type const *p_reg)
	Function for retrieving the state of pending interrupts.

NRF_STATIC_INLINE int32_t	nrf_lfrc_trim_status_get (NRF_LFRC_Type const *p_reg)
	Function for getting current trimming value of the LFRCOSC.

NRF_STATIC_INLINE bool	nrf_lfrc_statusana_ready_check (NRF_LFRC_Type const *p_reg)
	Function for checking status of analog module READY signal.

NRF_STATIC_INLINE bool	nrf_lfrc_statusana_settled_check (NRF_LFRC_Type const *p_reg)
	Function for checking status of analog module SETTLED signal.

NRF_STATIC_INLINE void	nrf_lfrc_config_set (NRF_LFRC_Type p_reg, nrf_lfrc_config_t const p_config)
	Function for override the configuration.

NRF_STATIC_INLINE void	nrf_lfrc_cal_cycle_length_set (NRF_LFRC_Type *p_reg, nrf_lfrc_cal_cycle_length_t length)
	Function for setting measurement cycle count length used while calibration.

NRF_STATIC_INLINE void	nrf_lfrc_cal_trim_limit_low_set (NRF_LFRC_Type *p_reg, uint32_t trimlimit)
	Function for setting lower trim limit.

NRF_STATIC_INLINE void	nrf_lfrc_cal_trim_limit_high_set (NRF_LFRC_Type *p_reg, uint32_t trimlimit)
	Function for setting higher trim limit.

NRF_STATIC_INLINE uint32_t	nrf_lfrc_cal_result_get (NRF_LFRC_Type const *p_reg, uint8_t number)
	Function for reading calibration results.

NRF_STATIC_INLINE uint16_t	nrf_lfrc_cal_num_of_cycles_get (NRF_LFRC_Type const *p_reg)
	Function for reading number of cycles when the CAL signal is high.

NRF_STATIC_INLINE void	nrf_lfrc_power_control_set (NRF_LFRC_Type *p_reg, nrf_lfrc_power_control_t pwrctrl)
	Function for power control set.

Detailed Description

Hardware access layer for managing the Low Frequency 32 KHz RC Oscillator (LFRC).

Enumeration Type Documentation

◆ nrf_lfrc_cal_cycle_length_t

enum nrf_lfrc_cal_cycle_length_t

Number of measurement cycles used during calibration.

Enumerator
NRF_LFRC_CAL_CYCLE_LENGTH_64	64 cycles
NRF_LFRC_CAL_CYCLE_LENGTH_128	128 cycles
NRF_LFRC_CAL_CYCLE_LENGTH_256	256 cycles
NRF_LFRC_CAL_CYCLE_LENGTH_512	512 cycles

◆ nrf_lfrc_event_t

enum nrf_lfrc_event_t

LFRC events.

Enumerator
NRF_LFRC_EVENT_CALDONE	LFRC calibration done.
NRF_LFRC_EVENT_TRIMDONE	LFRC trim done.
NRF_LFRC_EVENT_TRIMERROR	LFRC trim error.
NRF_LFRC_EVENT_CKSYNSTARTED	LFRC clock synchronization started.
NRF_LFRC_EVENT_CKLFRCSTARTED	LFRC clock started.

◆ nrf_lfrc_int_mask_t

enum nrf_lfrc_int_mask_t

LFRC interrupts.

Enumerator
NRF_LFRC_INT_CALDONE_MASK	Interrupt on CALDONE event.
NRF_LFRC_INT_TRIMDONE_MASK	Interrupt on TRIMDONE event.
NRF_LFRC_INT_TRIMERROR_MASK	Interrupt on TRIMERROR event.
NRF_LFRC_INT_CKSYNSTARTED_MASK	Interrupt on CKSYNSTARTED event.
NRF_LFRC_INT_CKLFRCSTARTED_MASK	Interrupt on CKLFRCSTARTED event.

◆ nrf_lfrc_power_control_t

enum nrf_lfrc_power_control_t

Power up control.

Enumerator
NRF_LFRC_POWER_CONTROL_AUTO	Automatically handled by the peripheral
NRF_LFRC_POWER_CONTROL_POWER_UP	Power up
NRF_LFRC_POWER_CONTROL_POWER_DOWN	Power down

◆ nrf_lfrc_task_t

enum nrf_lfrc_task_t

LFRC tasks.

The NRF_LFRC_TASK_CANCELCAL task cannot be set when the calibration is not running.

Enumerator
NRF_LFRC_TASK_CAL	Start LFRC calibration.
NRF_LFRC_TASK_CANCELCAL	Cancel LFRC calibration.

Function Documentation

◆ nrf_lfrc_cal_cycle_length_set()

NRF_STATIC_INLINE void nrf_lfrc_cal_cycle_length_set	(	NRF_LFRC_Type *	p_reg,
		nrf_lfrc_cal_cycle_length_t	length )

Function for setting measurement cycle count length used while calibration.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	length	Number of cycles.

◆ nrf_lfrc_cal_num_of_cycles_get()

NRF_STATIC_INLINE uint16_t nrf_lfrc_cal_num_of_cycles_get ( NRF_LFRC_Type const * p_reg )

Function for reading number of cycles when the CAL signal is high.

Parameters

[in] p_reg Pointer to the structure of registers of the peripheral.

Returns: Number of cycles.

◆ nrf_lfrc_cal_result_get()

NRF_STATIC_INLINE uint32_t nrf_lfrc_cal_result_get	(	NRF_LFRC_Type const *	p_reg,
		uint8_t	number )

Function for reading calibration results.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	number	Result number.

Returns: Result in 16 MHz clock cycles.

◆ nrf_lfrc_cal_trim_limit_high_set()

NRF_STATIC_INLINE void nrf_lfrc_cal_trim_limit_high_set	(	NRF_LFRC_Type *	p_reg,
		uint32_t	trimlimit )

Function for setting higher trim limit.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	trimlimit	TRIM limit value.

◆ nrf_lfrc_cal_trim_limit_low_set()

NRF_STATIC_INLINE void nrf_lfrc_cal_trim_limit_low_set	(	NRF_LFRC_Type *	p_reg,
		uint32_t	trimlimit )

Function for setting lower trim limit.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	trimlimit	TRIM limit value.

◆ nrf_lfrc_config_set()

NRF_STATIC_INLINE void nrf_lfrc_config_set	(	NRF_LFRC_Type *	p_reg,
		nrf_lfrc_config_t const *	p_config )

Function for override the configuration.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	p_config	Configuration parameters.

◆ nrf_lfrc_event_address_get()

NRF_STATIC_INLINE uint32_t nrf_lfrc_event_address_get	(	NRF_LFRC_Type const *	p_reg,
		nrf_lfrc_event_t	event )

Function for retrieving the address of the specified event.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	event	LFRC Event.

Returns: Address of the specified event register.

◆ nrf_lfrc_event_check()

NRF_STATIC_INLINE bool nrf_lfrc_event_check	(	NRF_LFRC_Type const *	p_reg,
		nrf_lfrc_event_t	event )

Function for retrieving the state of the specified event.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	event	Event to be checked.

Return values

true	The event has been generated.
false	The event has not been generated.

◆ nrf_lfrc_event_clear()

NRF_STATIC_INLINE void nrf_lfrc_event_clear	(	NRF_LFRC_Type *	p_reg,
		nrf_lfrc_event_t	event )

Function for clearing the specified event.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	event	Event to clear.

◆ nrf_lfrc_int_disable()

NRF_STATIC_INLINE void nrf_lfrc_int_disable	(	NRF_LFRC_Type *	p_reg,
		uint32_t	mask )

Function for disabling the specified interrupt.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	mask	Mask of interrupts to be disabled. Use nrf_lfrc_int_mask_t values for bit masking.

◆ nrf_lfrc_int_enable()

NRF_STATIC_INLINE void nrf_lfrc_int_enable	(	NRF_LFRC_Type *	p_reg,
		uint32_t	mask )

Function for enabling the specified interrupt.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	mask	Mask of interrupts to be enabled. Use nrf_lfrc_int_mask_t values for bit masking.

◆ nrf_lfrc_int_enable_check()

NRF_STATIC_INLINE uint32_t nrf_lfrc_int_enable_check	(	NRF_LFRC_Type const *	p_reg,
		uint32_t	mask )

Function for checking if the specified interrupts are enabled.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	mask	Mask of interrupts to be checked. Use nrf_lfrc_int_mask_t values for bit masking.

Returns: Mask of enabled interrupts.

◆ nrf_lfrc_int_pending_get()

NRF_STATIC_INLINE uint32_t nrf_lfrc_int_pending_get ( NRF_LFRC_Type const * p_reg )

Function for retrieving the state of pending interrupts.

States of pending interrupt are saved as a bitmask. One set at particular position means that interrupt for event is pending.

Parameters

[in] p_reg Pointer to the structure of registers of the peripheral.

Returns: Bitmask with information about pending interrupts. Use nrf_lfrc_int_mask_t values for bit masking.

◆ nrf_lfrc_power_control_set()

NRF_STATIC_INLINE void nrf_lfrc_power_control_set	(	NRF_LFRC_Type *	p_reg,
		nrf_lfrc_power_control_t	pwrctrl )

Function for power control set.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	pwrctrl	Power up control.

◆ nrf_lfrc_statusana_ready_check()

NRF_STATIC_INLINE bool nrf_lfrc_statusana_ready_check ( NRF_LFRC_Type const * p_reg )

Function for checking status of analog module READY signal.

Parameters

[in] p_reg Pointer to the structure of registers of the peripheral.

Return values

true	The signal is logic 1.
false	The signal is logic 0.

◆ nrf_lfrc_statusana_settled_check()

NRF_STATIC_INLINE bool nrf_lfrc_statusana_settled_check ( NRF_LFRC_Type const * p_reg )

Function for checking status of analog module SETTLED signal.

Parameters

[in] p_reg Pointer to the structure of registers of the peripheral.

Return values

true	The signal is logic 1.
false	The signal is logic 0.

◆ nrf_lfrc_task_address_get()

NRF_STATIC_INLINE uint32_t nrf_lfrc_task_address_get	(	NRF_LFRC_Type const *	p_reg,
		nrf_lfrc_task_t	task )

Function for retrieving the address of the specified task.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	task	LFRC Task.

Returns: Address of the requested task register.

◆ nrf_lfrc_task_trigger()

NRF_STATIC_INLINE void nrf_lfrc_task_trigger	(	NRF_LFRC_Type *	p_reg,
		nrf_lfrc_task_t	task )

Function for setting the specified task.

Parameters

[in]	p_reg	Pointer to the structure of registers of the peripheral.
[in]	task	Task to be activated.

◆ nrf_lfrc_trim_status_get()

NRF_STATIC_INLINE int32_t nrf_lfrc_trim_status_get ( NRF_LFRC_Type const * p_reg )

Function for getting current trimming value of the LFRCOSC.

Note: Returned value is in 2's complement format, 1.4% steps.

Parameters

[in] p_reg Pointer to the structure of registers of the peripheral.

Returns: Trim value register contents.

Data Structures

Macros

Enumerations

Functions

Detailed Description

Enumeration Type Documentation

◆ nrf_lfrc_cal_cycle_length_t

◆ nrf_lfrc_event_t

◆ nrf_lfrc_int_mask_t

◆ nrf_lfrc_power_control_t

◆ nrf_lfrc_task_t

Function Documentation

◆ nrf_lfrc_cal_cycle_length_set()

◆ nrf_lfrc_cal_num_of_cycles_get()

◆ nrf_lfrc_cal_result_get()

◆ nrf_lfrc_cal_trim_limit_high_set()

◆ nrf_lfrc_cal_trim_limit_low_set()

◆ nrf_lfrc_config_set()

◆ nrf_lfrc_event_address_get()

◆ nrf_lfrc_event_check()

◆ nrf_lfrc_event_clear()

◆ nrf_lfrc_int_disable()

◆ nrf_lfrc_int_enable()

◆ nrf_lfrc_int_enable_check()

◆ nrf_lfrc_int_pending_get()

◆ nrf_lfrc_power_control_set()

◆ nrf_lfrc_statusana_ready_check()

◆ nrf_lfrc_statusana_settled_check()

◆ nrf_lfrc_task_address_get()

◆ nrf_lfrc_task_trigger()

◆ nrf_lfrc_trim_status_get()