QDEC HAL

Hardware abstraction layer for accessing the quadrature decoder (QDEC) peripheral. More...

Enumerations
enum	nrf_qdec_task_t {   NRF_QDEC_TASK_START = offsetof(NRF_QDEC_Type, TASKS_START),   NRF_QDEC_TASK_STOP = offsetof(NRF_QDEC_Type, TASKS_STOP),   NRF_QDEC_TASK_READCLRACC = offsetof(NRF_QDEC_Type, TASKS_READCLRACC) }
	QDEC tasks. More...
enum	nrf_qdec_event_t {   NRF_QDEC_EVENT_SAMPLERDY = offsetof(NRF_QDEC_Type, EVENTS_SAMPLERDY),   NRF_QDEC_EVENT_REPORTRDY = offsetof(NRF_QDEC_Type, EVENTS_REPORTRDY),   NRF_QDEC_EVENT_ACCOF = offsetof(NRF_QDEC_Type, EVENTS_ACCOF) }
	QDEC events. More...
enum	nrf_qdec_short_mask_t {   NRF_QDEC_SHORT_REPORTRDY_READCLRACC_MASK = QDEC_SHORTS_REPORTRDY_READCLRACC_Msk,   NRF_QDEC_SHORT_SAMPLERDY_STOP_MASK = QDEC_SHORTS_SAMPLERDY_STOP_Msk }
	QDEC shortcuts. More...
enum	nrf_qdec_int_mask_t {   NRF_QDEC_INT_SAMPLERDY_MASK = QDEC_INTENSET_SAMPLERDY_Msk,   NRF_QDEC_INT_REPORTRDY_MASK = QDEC_INTENSET_REPORTRDY_Msk,   NRF_QDEC_INT_ACCOF_MASK = QDEC_INTENSET_ACCOF_Msk }
	QDEC interrupts. More...
enum	nrf_qdec_enable_t {   NRF_QDEC_DISABLE = QDEC_ENABLE_ENABLE_Disabled,   NRF_QDEC_ENABLE = QDEC_ENABLE_ENABLE_Enabled }
	States of the enable bit. More...
enum	nrf_qdec_dbfen_t {   NRF_QDEC_DBFEN_DISABLE = QDEC_DBFEN_DBFEN_Disabled,   NRF_QDEC_DBFEN_ENABLE = QDEC_DBFEN_DBFEN_Enabled }
	States of the debounce filter enable bit. More...
enum	nrf_qdec_pio_t {   NRF_QDEC_PIO_PSELLED,   NRF_QDEC_PIO_PSELA,   NRF_QDEC_PIO_PSELB }
	QDEC peripheral input/output pins. More...
enum	nrf_qdec_ledpol_t {   NRF_QDEC_LEPOL_ACTIVE_LOW = QDEC_LEDPOL_LEDPOL_ActiveLow,   NRF_QDEC_LEPOL_ACTIVE_HIGH = QDEC_LEDPOL_LEDPOL_ActiveHigh }
	Active LED polarity. More...
enum	nrf_qdec_sampleper_t {   NRF_QDEC_SAMPLEPER_128us = QDEC_SAMPLEPER_SAMPLEPER_128us,   NRF_QDEC_SAMPLEPER_256us = QDEC_SAMPLEPER_SAMPLEPER_256us,   NRF_QDEC_SAMPLEPER_512us = QDEC_SAMPLEPER_SAMPLEPER_512us,   NRF_QDEC_SAMPLEPER_1024us = QDEC_SAMPLEPER_SAMPLEPER_1024us,   NRF_QDEC_SAMPLEPER_2048us = QDEC_SAMPLEPER_SAMPLEPER_2048us,   NRF_QDEC_SAMPLEPER_4096us = QDEC_SAMPLEPER_SAMPLEPER_4096us,   NRF_QDEC_SAMPLEPER_8192us = QDEC_SAMPLEPER_SAMPLEPER_8192us,   NRF_QDEC_SAMPLEPER_16384us = QDEC_SAMPLEPER_SAMPLEPER_16384us }
	Available sampling periods. More...
enum	nrf_qdec_reportper_t {   NRF_QDEC_REPORTPER_10 = QDEC_REPORTPER_REPORTPER_10Smpl,   NRF_QDEC_REPORTPER_40 = QDEC_REPORTPER_REPORTPER_40Smpl,   NRF_QDEC_REPORTPER_80 = QDEC_REPORTPER_REPORTPER_80Smpl,   NRF_QDEC_REPORTPER_120 = QDEC_REPORTPER_REPORTPER_120Smpl,   NRF_QDEC_REPORTPER_160 = QDEC_REPORTPER_REPORTPER_160Smpl,   NRF_QDEC_REPORTPER_200 = QDEC_REPORTPER_REPORTPER_200Smpl,   NRF_QDEC_REPORTPER_240 = QDEC_REPORTPER_REPORTPER_240Smpl,   NRF_QDEC_REPORTPER_280 = QDEC_REPORTPER_REPORTPER_280Smpl,   NRF_QDEC_REPORTPER_DISABLED }
	Available report periods. More...

Functions
__STATIC_INLINE void	nrf_qdec_enable (void)
	Function for enabling QDEC.
__STATIC_INLINE void	nrf_qdec_disable (void)
	Function for disabling QDEC.
__STATIC_INLINE uint32_t	nrf_qdec_enable_get (void)
	Function for returning the enable state of QDEC. More...
__STATIC_INLINE void	nrf_qdec_int_enable (uint32_t qdec_int_mask)
	Function for enabling QDEC interrupts by mask. More...
__STATIC_INLINE void	nrf_qdec_int_disable (uint32_t qdec_int_mask)
	Function for disabling QDEC interrupts by mask. More...
__STATIC_INLINE uint32_t	nrf_qdec_int_enable_check (nrf_qdec_int_mask_t qdec_int_mask)
	Function for getting the enabled interrupts of the QDEC.
__STATIC_INLINE void	nrf_qdec_dbfen_enable (void)
	Function for enabling the debouncing filter of the QED.
__STATIC_INLINE void	nrf_qdec_dbfen_disable (void)
	Function for disabling the debouncing filter of the QED.
__STATIC_INLINE uint32_t	nrf_qdec_dbfen_get (void)
	Function for getting the state of the QDEC's debouncing filter. More...
__STATIC_INLINE uint32_t	nrf_qdec_pio_assign (nrf_qdec_pio_t qdec_pio, uint32_t pin_number)
	Function for assigning QDEC pins. More...
__STATIC_INLINE uint32_t	nrf_qdec_pio_assignment_get (nrf_qdec_pio_t qdec_pio, uint32_t *p_pin_number)
	Function for retrieving the assigned pin number for a pio function. More...
__STATIC_INLINE void	nrf_qdec_task_trigger (nrf_qdec_task_t qdec_task)
	Function for setting a specific QDEC task. More...
__STATIC_INLINE uint32_t *	nrf_qdec_task_address_get (nrf_qdec_task_t qdec_task)
	Function for retrieving the address of a QDEC task register. More...
__STATIC_INLINE void	nrf_qdec_event_clear (nrf_qdec_event_t qdec_event)
	Function for clearing a specific QDEC event. More...
__STATIC_INLINE uint32_t	nrf_qdec_event_check (nrf_qdec_event_t qdec_event)
	Function for retrieving the state of a specific QDEC event. More...
__STATIC_INLINE uint32_t *	nrf_qdec_event_address_get (nrf_qdec_event_t qdec_event)
	Function for retrieving the address of a specific QDEC event register. More...
__STATIC_INLINE void	nrf_qdec_shorts_enable (uint32_t qdec_short_mask)
	Function for setting QDEC shortcuts. More...
__STATIC_INLINE void	nrf_qdec_shorts_disable (uint32_t qdec_short_mask)
	Function for clearing shortcuts of the QDEC by mask. More...
__STATIC_INLINE int32_t	nrf_qdec_sampleper_reg_get (void)
	Function for retrieving the value of QDEC's SAMPLEPER register. More...
__STATIC_INLINE uint32_t	nrf_qdec_sampleper_to_value (uint32_t sampleper)
	Function for converting the value of QDEC's SAMPLE PERIOD to microseconds. More...
__STATIC_INLINE void	nrf_qdec_sampleper_set (nrf_qdec_sampleper_t sample_per)
	Function for setting the value of QDEC's SAMPLEPER register. More...
__STATIC_INLINE int32_t	nrf_qdec_sample_get (void)
	Function for retrieving the value of QDEC's SAMPLE register. More...
__STATIC_INLINE int32_t	nrf_qdec_acc_get (void)
	Function for retrieving the value of QDEC's ACC register. More...
__STATIC_INLINE int32_t	nrf_qdec_accread_get (void)
	Function for retrieving the value of QDEC's ACCREAD register. More...
__STATIC_INLINE uint32_t	nrf_qdec_accdbl_get (void)
	Function for retrieving the value of QDEC's ACCDBL register. More...
__STATIC_INLINE uint32_t	nrf_qdec_accdblread_get (void)
	Function for retrieving the value of QDEC's ACCDBLREAD register. More...
__STATIC_INLINE void	nrf_qdec_ledpre_set (uint32_t time_us)
	Function for setting how long the LED is switched on before sampling. More...
__STATIC_INLINE uint32_t	nrf_qdec_ledpre_get (void)
	Function for retrieving how long the LED is switched on before sampling. More...
__STATIC_INLINE void	nrf_qdec_reportper_set (nrf_qdec_reportper_t reportper)
	Function for setting the report period (in samples). More...
__STATIC_INLINE uint32_t	nrf_qdec_reportper_reg_get (void)
	Function for retrieving the report period. More...
__STATIC_INLINE uint32_t	nrf_qdec_reportper_to_value (uint32_t reportper)
	Function for retrieving the value of QDEC's SAMPLEPER register. More...
__STATIC_INLINE void	nrf_qdec_ledpol_set (nrf_qdec_ledpol_t pol)
	Function for setting the active level for the LED. More...
__STATIC_INLINE uint32_t	nrf_qdec_ledpol_get (void)
	Function for retrieving the active level for the LED. More...

Detailed Description

Hardware abstraction layer for accessing the quadrature decoder (QDEC) peripheral.

Enumeration Type Documentation

enum nrf_qdec_dbfen_t

States of the debounce filter enable bit.

Enumerator
NRF_QDEC_DBFEN_DISABLE	Mask for disabling the debounce filter.
NRF_QDEC_DBFEN_ENABLE	Mask for enabling the debounce filter.

enum nrf_qdec_enable_t

States of the enable bit.

Enumerator
NRF_QDEC_DISABLE	Mask for disabling the QDEC periperal. When disabled, the QDEC decoder pins are not active.
NRF_QDEC_ENABLE	Mask for enabling the QDEC periperal. When enabled, the QDEC pins are active.

enum nrf_qdec_event_t

QDEC events.

Enumerator
NRF_QDEC_EVENT_SAMPLERDY	Event generated for every new sample.
NRF_QDEC_EVENT_REPORTRDY	Event generated for every new report.
NRF_QDEC_EVENT_ACCOF	Event generated for every accumulator overflow.

enum nrf_qdec_int_mask_t

QDEC interrupts.

Enumerator
NRF_QDEC_INT_SAMPLERDY_MASK	Mask for enabling or disabling an interrupt on SAMPLERDY event.
NRF_QDEC_INT_REPORTRDY_MASK	Mask for enabling or disabling an interrupt on REPORTRDY event.
NRF_QDEC_INT_ACCOF_MASK	Mask for enabling or disabling an interrupt on ACCOF event.

enum nrf_qdec_ledpol_t

Active LED polarity.

Enumerator
NRF_QDEC_LEPOL_ACTIVE_LOW	QDEC LED active on output pin low.
NRF_QDEC_LEPOL_ACTIVE_HIGH	QDEC LED active on output pin high.

enum nrf_qdec_pio_t

QDEC peripheral input/output pins.

Enumerator
NRF_QDEC_PIO_PSELLED	QDEC LED output pin.
NRF_QDEC_PIO_PSELA	QDEC A input pin.
NRF_QDEC_PIO_PSELB	QDEC B input pin.

enum nrf_qdec_reportper_t

Available report periods.

Enumerator
NRF_QDEC_REPORTPER_10	QDEC report period 10 samples.
NRF_QDEC_REPORTPER_40	QDEC report period 40 samples.
NRF_QDEC_REPORTPER_80	QDEC report period 80 samples.
NRF_QDEC_REPORTPER_120	QDEC report period 120 samples.
NRF_QDEC_REPORTPER_160	QDEC report period 160 samples.
NRF_QDEC_REPORTPER_200	QDEC report period 200 samples.
NRF_QDEC_REPORTPER_240	QDEC report period 240 samples.
NRF_QDEC_REPORTPER_280	QDEC report period 280 samples.
NRF_QDEC_REPORTPER_DISABLED	QDEC reporting disabled.

enum nrf_qdec_sampleper_t

Available sampling periods.

Enumerator
NRF_QDEC_SAMPLEPER_128us	QDEC sampling period 128 microseconds.
NRF_QDEC_SAMPLEPER_256us	QDEC sampling period 256 microseconds.
NRF_QDEC_SAMPLEPER_512us	QDEC sampling period 512 microseconds.
NRF_QDEC_SAMPLEPER_1024us	QDEC sampling period 1024 microseconds.
NRF_QDEC_SAMPLEPER_2048us	QDEC sampling period 2048 microseconds.
NRF_QDEC_SAMPLEPER_4096us	QDEC sampling period 4096 microseconds.
NRF_QDEC_SAMPLEPER_8192us	QDEC sampling period 8192 microseconds.
NRF_QDEC_SAMPLEPER_16384us	QDEC sampling period 16384 microseconds.

enum nrf_qdec_short_mask_t

QDEC shortcuts.

Enumerator
NRF_QDEC_SHORT_REPORTRDY_READCLRACC_MASK	Shortcut between REPORTRDY event and READCLRACC task.
NRF_QDEC_SHORT_SAMPLERDY_STOP_MASK	Shortcut between SAMPLERDY event and STOP task.

enum nrf_qdec_task_t

QDEC tasks.

Enumerator
NRF_QDEC_TASK_START	Starting the quadrature decoder.
NRF_QDEC_TASK_STOP	Stopping the quadrature decoder.
NRF_QDEC_TASK_READCLRACC	Reading and clearing ACC and ACCDBL registers.

Function Documentation

__STATIC_INLINE int32_t nrf_qdec_acc_get

(

void

)

Function for retrieving the value of QDEC's ACC register.

Returns

Value of the ACC register.

__STATIC_INLINE uint32_t nrf_qdec_accdbl_get

(

void

)

Function for retrieving the value of QDEC's ACCDBL register.

Returns

Value of the ACCDBL register.

__STATIC_INLINE uint32_t nrf_qdec_accdblread_get

(

void

)

Function for retrieving the value of QDEC's ACCDBLREAD register.

Returns

Value of the ACCDBLREAD register.

__STATIC_INLINE int32_t nrf_qdec_accread_get

(

void

)

Function for retrieving the value of QDEC's ACCREAD register.

Returns

Value of the ACCREAD register.

__STATIC_INLINE uint32_t nrf_qdec_dbfen_get

(

void

)

Function for getting the state of the QDEC's debouncing filter.

Return values

NRF_QDEC_DBFEN_DISABLE	If the debouncing filter is disabled.
NRF_QDEC_DBFEN_ENABLE	If the debouncing filter is enabled.

__STATIC_INLINE uint32_t nrf_qdec_enable_get

(

void

)

Function for returning the enable state of QDEC.

Returns

State of the register.

__STATIC_INLINE uint32_t* nrf_qdec_event_address_get

(

nrf_qdec_event_t

qdec_event

)

Function for retrieving the address of a specific QDEC event register.

Parameters

[in]

qdec_event

QDEC event.

Returns

Address of the specified QDEC event.

__STATIC_INLINE uint32_t nrf_qdec_event_check

(

nrf_qdec_event_t

qdec_event

)

Function for retrieving the state of a specific QDEC event.

Returns

State of the QDEC event.

__STATIC_INLINE void nrf_qdec_event_clear

(

nrf_qdec_event_t

qdec_event

)

Function for clearing a specific QDEC event.

Parameters

[in]

qdec_event

QDEC event to clear.

__STATIC_INLINE void nrf_qdec_int_disable

(

uint32_t

qdec_int_mask

)

Function for disabling QDEC interrupts by mask.

Parameters

[in]

qdec_int_mask

Sources of the interrupts to disable.

__STATIC_INLINE void nrf_qdec_int_enable

(

uint32_t

qdec_int_mask

)

Function for enabling QDEC interrupts by mask.

Parameters

[in]

qdec_int_mask

Sources of the interrupts to enable.

__STATIC_INLINE uint32_t nrf_qdec_ledpol_get

(

void

)

Function for retrieving the active level for the LED.

Returns

Active level for the LED.

__STATIC_INLINE void nrf_qdec_ledpol_set

(

nrf_qdec_ledpol_t

pol

)

Function for setting the active level for the LED.

Parameters

[in]

pol

Active level for the LED.

__STATIC_INLINE uint32_t nrf_qdec_ledpre_get

(

void

)

Function for retrieving how long the LED is switched on before sampling.

Return values

time_us

Time (in microseconds) how long the LED is switched on before sampling.

__STATIC_INLINE void nrf_qdec_ledpre_set

(

uint32_t

time_us

)

Function for setting how long the LED is switched on before sampling.

Parameters

[in]

time_us

Time (in microseconds) how long the LED is switched on before sampling.

__STATIC_INLINE uint32_t nrf_qdec_pio_assign	(	nrf_qdec_pio_t	qdec_pio,
		uint32_t	pin_number
	)

Function for assigning QDEC pins.

Parameters

[in]	qdec_pio	Function of the pin.
[in]	pin_number	Pin number.

Return values

NRF_SUCCESS	If the function could be assigned to the pin successfully.
NRF_ERROR_INVALID_PARAM	If the input parameters are invalid.

__STATIC_INLINE uint32_t nrf_qdec_pio_assignment_get	(	nrf_qdec_pio_t	qdec_pio,
		uint32_t *	p_pin_number
	)

Function for retrieving the assigned pin number for a pio function.

Parameters

[in]	qdec_pio	Function of the the pin.
[out]	p_pin_number	Pointer to the pin number.

Return values

NRF_SUCCESS	If the pin number could be retrieved successfully.
NRF_ERROR_INVALID_PARAM	If the input parameter is invalid.
NRF_ERROR_NULL	If no pin number is assigned.

__STATIC_INLINE uint32_t nrf_qdec_reportper_reg_get

(

void

)

Function for retrieving the report period.

Return values

reportper

Number of samples as encoded in the register.

__STATIC_INLINE void nrf_qdec_reportper_set

(

nrf_qdec_reportper_t

reportper

)

Function for setting the report period (in samples).

Parameters

[in]

reportper

Number of samples.

__STATIC_INLINE uint32_t nrf_qdec_reportper_to_value

(

uint32_t

reportper

)

Function for retrieving the value of QDEC's SAMPLEPER register.

Parameters

[in]

reportper

Reportper to be converted to amount of samples per report.

__STATIC_INLINE int32_t nrf_qdec_sample_get

(

void

)

Function for retrieving the value of QDEC's SAMPLE register.

Returns

Value of the SAMPLE register.

__STATIC_INLINE int32_t nrf_qdec_sampleper_reg_get

(

void

)

Function for retrieving the value of QDEC's SAMPLEPER register.

Returns

Value of the SAMPLEPER register.

__STATIC_INLINE void nrf_qdec_sampleper_set

(

nrf_qdec_sampleper_t

sample_per

)

Function for setting the value of QDEC's SAMPLEPER register.

Parameters

[in]

sample_per

Sampling period.

__STATIC_INLINE uint32_t nrf_qdec_sampleper_to_value

(

uint32_t

sampleper

)

Function for converting the value of QDEC's SAMPLE PERIOD to microseconds.

Return values

sampling

period in microseconds.

__STATIC_INLINE void nrf_qdec_shorts_disable

(

uint32_t

qdec_short_mask

)

Function for clearing shortcuts of the QDEC by mask.

Parameters

[in]

qdec_short_mask

QDEC shortcute to be cleared.

__STATIC_INLINE void nrf_qdec_shorts_enable

(

uint32_t

qdec_short_mask

)

Function for setting QDEC shortcuts.

Parameters

[in]

qdec_short_mask

QDEC shortcut by mask.

__STATIC_INLINE uint32_t* nrf_qdec_task_address_get

(

nrf_qdec_task_t

qdec_task

)

Function for retrieving the address of a QDEC task register.

Parameters

[in]

qdec_task

QDEC task.

__STATIC_INLINE void nrf_qdec_task_trigger

(

nrf_qdec_task_t

qdec_task

)

Function for setting a specific QDEC task.

Parameters

[in]

qdec_task

QDEC task to be set.