Hardware access layer for the two-wire interface (TWI) peripheral. More...

Enumerations
enum	nrf_twi_tasks_t { NRF_TWI_TASKS_STARTRX = offsetof(NRF_TWI_Type, TASKS_STARTRX), NRF_TWI_TASKS_STARTTX = offsetof(NRF_TWI_Type, TASKS_STARTTX), NRF_TWI_TASKS_STOP = offsetof(NRF_TWI_Type, TASKS_STOP), NRF_TWI_TASKS_SUSPEND = offsetof(NRF_TWI_Type, TASKS_SUSPEND), NRF_TWI_TASKS_RESUME = offsetof(NRF_TWI_Type, TASKS_RESUME) }
	TWI tasks. More...

enum	nrf_twi_events_t { NRF_TWI_EVENTS_STOPPED = offsetof(NRF_TWI_Type, EVENTS_STOPPED), NRF_TWI_EVENTS_RXDREADY = offsetof(NRF_TWI_Type, EVENTS_RXDREADY), NRF_TWI_EVENTS_TXDSENT = offsetof(NRF_TWI_Type, EVENTS_TXDSENT), NRF_TWI_EVENTS_ERROR = offsetof(NRF_TWI_Type, EVENTS_ERROR), NRF_TWI_EVENTS_BB = offsetof(NRF_TWI_Type, EVENTS_BB), NRF_TWI_EVENTS_SUSPENDED = offsetof(NRF_TWI_Type, EVENTS_SUSPENDED) }
	TWI events. More...

enum	nrf_twi_int_mask_t { NRF_TWI_INT_SUSPENDED_MASK = TWI_INTENSET_SUSPENDED_Msk, NRF_TWI_INT_BB_MASK = TWI_INTENSET_BB_Msk, NRF_TWI_INT_ERROR_MASK = TWI_INTENSET_ERROR_Msk, NRF_TWI_INT_TXDSENT_MASK = TWI_INTENSET_TXDSENT_Msk, NRF_TWI_INT_RXDREADY_MASK = TWI_INTENSET_RXDREADY_Msk, NRF_TWI_INT_STOPPED_MASK = TWI_INTENSET_STOPPED_Msk }
	TWI interrupts. More...

enum	nrf_twi_shorts_mask_t { NRF_TWI_SHORTS_BB_SUSPEND_MASK = TWI_SHORTS_BB_SUSPEND_Msk, NRF_TWI_SHORTS_BB_STOP_MASK = TWI_SHORTS_BB_STOP_Msk }
	Types of TWI shortcuts. More...

enum	nrf_twi_frequency_t { NRF_TWI_FREQ_100K = TWI_FREQUENCY_FREQUENCY_K100, NRF_TWI_FREQ_250K = TWI_FREQUENCY_FREQUENCY_K250, NRF_TWI_FREQ_400K = TWI_FREQUENCY_FREQUENCY_K400 }
	TWI master clock frequency. More...

enum	nrf_twi_error_t { NRF_TWI_ERROR_ADDRESS_NACK = TWI_ERRORSRC_ANACK_Msk, NRF_TWI_ERROR_OVERRUN_NACK = TWI_ERRORSRC_OVERRUN_Msk, NRF_TWI_ERROR_DATA_NACK = TWI_ERRORSRC_DNACK_Msk }
	TWI error source. More...

Functions
__STATIC_INLINE void	nrf_twi_task_set (NRF_TWI_Type *p_twi, nrf_twi_tasks_t task)
	Function for activating a specific TWI task. More...

__STATIC_INLINE uint32_t *	nrf_twi_task_address_get (NRF_TWI_Type *p_twi, nrf_twi_tasks_t task)
	Function for returning the address of a specific TWI task register. More...

__STATIC_INLINE void	nrf_twi_event_clear (NRF_TWI_Type *p_twi, nrf_twi_events_t event)
	Function for clearing a specific event. More...

__STATIC_INLINE bool	nrf_twi_event_check (NRF_TWI_Type *p_twi, nrf_twi_events_t event)
	Function for returning the state of a specific event. More...

__STATIC_INLINE uint32_t *	nrf_twi_event_address_get (NRF_TWI_Type *p_twi, nrf_twi_events_t event)
	Function for returning the address of a specific TWI event register. More...

__STATIC_INLINE void	nrf_twi_shorts_set (NRF_TWI_Type *p_twi, uint32_t short_mask)
	Function for setting a shortcut. More...

__STATIC_INLINE void	nrf_twi_shorts_clear (NRF_TWI_Type *p_twi, uint32_t short_mask)
	Function for clearing shortcuts. More...

__STATIC_INLINE void	nrf_twi_int_enable (NRF_TWI_Type *p_twi, uint32_t int_mask)
	Function for enabling a specific interrupt. More...

__STATIC_INLINE bool	nrf_twi_int_enable_check (NRF_TWI_Type *p_twi, uint32_t int_mask)
	Function for retrieving the state of a given interrupt. More...

__STATIC_INLINE void	nrf_twi_int_disable (NRF_TWI_Type *p_twi, uint32_t int_mask)
	Function for disabling a specific interrupt. More...

__STATIC_INLINE void	nrf_twi_frequency_set (NRF_TWI_Type *p_twi, nrf_twi_frequency_t frequency)
	Function for setting the TWI master clock frequency. More...

__STATIC_INLINE nrf_twi_frequency_t	nrf_twi_frequency_get (NRF_TWI_Type *p_twi)
	Function for retrieving the TWI frequency. More...

__STATIC_INLINE uint32_t	nrf_twi_error_source_get (NRF_TWI_Type *p_twi)
	Function for retrieving the TWI error source. More...

__STATIC_INLINE void	nrf_twi_enable (NRF_TWI_Type *p_twi)
	Function for enabling TWI. More...

__STATIC_INLINE void	nrf_twi_disable (NRF_TWI_Type *p_twi)
	Function for disabling TWI. More...

__STATIC_INLINE void	nrf_twi_pins_set (NRF_TWI_Type *p_twi, uint32_t scl, uint32_t sda)
	Function for configuring TWI pins. More...

__STATIC_INLINE uint8_t	nrf_twi_rxd_get (NRF_TWI_Type *p_twi)
	Function for reading RX data from TWI. More...

__STATIC_INLINE void	nrf_twi_txd_set (NRF_TWI_Type *p_twi, uint8_t data)
	Function for writing data to TWI. More...

__STATIC_INLINE void	nrf_twi_address_set (NRF_TWI_Type *p_twi, uint8_t addr)
	Function for setting the slave address. More...

Detailed Description

Hardware access layer for the two-wire interface (TWI) peripheral.

Enumeration Type Documentation

enum nrf_twi_error_t

TWI error source.

Enumerator
NRF_TWI_ERROR_ADDRESS_NACK	NACK received after sending the address.
NRF_TWI_ERROR_OVERRUN_NACK	Byte received in RXD register before read of the last received byte (data loss).
NRF_TWI_ERROR_DATA_NACK	NACK received after sending a data byte.

enum nrf_twi_events_t

TWI events.

Enumerator
NRF_TWI_EVENTS_STOPPED	Stopped.
NRF_TWI_EVENTS_RXDREADY	RXD byte received.
NRF_TWI_EVENTS_TXDSENT	TXD byte sent.
NRF_TWI_EVENTS_ERROR	Error.
NRF_TWI_EVENTS_BB	Byte boundary, generated before each byte that is sent or received.
NRF_TWI_EVENTS_SUSPENDED	Entered the suspended state.

enum nrf_twi_frequency_t

TWI master clock frequency.

Enumerator
NRF_TWI_FREQ_100K	100 kbps.
NRF_TWI_FREQ_250K	250 kbps.
NRF_TWI_FREQ_400K	400 kbps.

enum nrf_twi_int_mask_t

TWI interrupts.

Enumerator
NRF_TWI_INT_SUSPENDED_MASK	TWI interrupt on suspend event.
NRF_TWI_INT_BB_MASK	TWI interrupt on byte boundary event.
NRF_TWI_INT_ERROR_MASK	TWI interrupt on error event.
NRF_TWI_INT_TXDSENT_MASK	TWI interrupt on txdsent event.
NRF_TWI_INT_RXDREADY_MASK	TWI interrupt on rxdready event.
NRF_TWI_INT_STOPPED_MASK	TWI interrupt on stopped event.

enum nrf_twi_shorts_mask_t

Types of TWI shortcuts.

Enumerator
NRF_TWI_SHORTS_BB_SUSPEND_MASK	Shortcut between bb event and suspend task.
NRF_TWI_SHORTS_BB_STOP_MASK	Shortcut between bb event and stop task.

enum nrf_twi_tasks_t

TWI tasks.

Enumerator
NRF_TWI_TASKS_STARTRX	Start receive sequence.
NRF_TWI_TASKS_STARTTX	Start transmit sequence.
NRF_TWI_TASKS_STOP	Stop transaction.
NRF_TWI_TASKS_SUSPEND	Suspend transaction.
NRF_TWI_TASKS_RESUME	Resume transaction.

Function Documentation

__STATIC_INLINE void nrf_twi_address_set	(	NRF_TWI_Type *	p_twi,
		uint8_t	addr
	)

Function for setting the slave address.

Parameters

[in]	p_twi	TWI instance.
[in]	addr	Address of next transaction.

__STATIC_INLINE void nrf_twi_disable ( NRF_TWI_Type * p_twi )

Function for disabling TWI.

Parameters

[in] p_twi TWI instance.

__STATIC_INLINE void nrf_twi_enable ( NRF_TWI_Type * p_twi )

Function for enabling TWI.

Parameters

[in] p_twi TWI instance.

__STATIC_INLINE uint32_t nrf_twi_error_source_get ( NRF_TWI_Type * p_twi )

Function for retrieving the TWI error source.

Error sources are cleared after read.

Parameters

[in] p_twi TWI instance.

Returns: Error source mask.

__STATIC_INLINE uint32_t* nrf_twi_event_address_get	(	NRF_TWI_Type *	p_twi,
		nrf_twi_events_t	event
	)

Function for returning the address of a specific TWI event register.

Parameters

[in]	p_twi	TWI instance.
[in]	event	Event.

Returns: Address.

__STATIC_INLINE bool nrf_twi_event_check	(	NRF_TWI_Type *	p_twi,
		nrf_twi_events_t	event
	)

Function for returning the state of a specific event.

Parameters

[in]	p_twi	TWI instance.
[in]	event	Event.

Return values

true	If the event is set.
false	If the event is not set.

__STATIC_INLINE void nrf_twi_event_clear	(	NRF_TWI_Type *	p_twi,
		nrf_twi_events_t	event
	)

Function for clearing a specific event.

Parameters

[in]	p_twi	TWI instance.
[in]	event	Event.

__STATIC_INLINE nrf_twi_frequency_t nrf_twi_frequency_get ( NRF_TWI_Type * p_twi )

Function for retrieving the TWI frequency.

Parameters

[in] p_twi TWI instance.

Returns: Frequency.

__STATIC_INLINE void nrf_twi_frequency_set	(	NRF_TWI_Type *	p_twi,
		nrf_twi_frequency_t	frequency
	)

Function for setting the TWI master clock frequency.

Parameters

[in]	p_twi	TWI instance.
[in]	frequency	TWI frequency value.

__STATIC_INLINE void nrf_twi_int_disable	(	NRF_TWI_Type *	p_twi,
		uint32_t	int_mask
	)

Function for disabling a specific interrupt.

Parameters

[in]	p_twi	TWI instance.
[in]	int_mask	Interrupts mask.

__STATIC_INLINE void nrf_twi_int_enable	(	NRF_TWI_Type *	p_twi,
		uint32_t	int_mask
	)

Function for enabling a specific interrupt.

Parameters

[in]	p_twi	TWI instance.
[in]	int_mask	Interrupts mask.

__STATIC_INLINE bool nrf_twi_int_enable_check	(	NRF_TWI_Type *	p_twi,
		uint32_t	int_mask
	)

Function for retrieving the state of a given interrupt.

Parameters

[in]	p_twi	TWI instance.
[in]	int_mask	Interrupts mask.

Return values

true	If the interrupts are enabled.
false	If the interrupts are not enabled.

__STATIC_INLINE void nrf_twi_pins_set	(	NRF_TWI_Type *	p_twi,
		uint32_t	scl,
		uint32_t	sda
	)

Function for configuring TWI pins.

Parameters

[in]	p_twi	TWI instance.
[in]	scl	SCL pin number.
[in]	sda	SDA pin number.

__STATIC_INLINE uint8_t nrf_twi_rxd_get ( NRF_TWI_Type * p_twi )

Function for reading RX data from TWI.

Parameters

[in] p_twi TWI instance.

Returns: RX data.

__STATIC_INLINE void nrf_twi_shorts_clear	(	NRF_TWI_Type *	p_twi,
		uint32_t	short_mask
	)

Function for clearing shortcuts.

Parameters

[in]	p_twi	TWI instance.
[in]	short_mask	Shortcuts mask.

__STATIC_INLINE void nrf_twi_shorts_set	(	NRF_TWI_Type *	p_twi,
		uint32_t	short_mask
	)

Function for setting a shortcut.

Parameters

[in]	p_twi	TWI instance.
[in]	short_mask	Shortcuts mask.

__STATIC_INLINE uint32_t* nrf_twi_task_address_get	(	NRF_TWI_Type *	p_twi,
		nrf_twi_tasks_t	task
	)

Function for returning the address of a specific TWI task register.

Parameters

[in]	p_twi	TWI instance.
[in]	task	Task.

Returns: Task address.

__STATIC_INLINE void nrf_twi_task_set	(	NRF_TWI_Type *	p_twi,
		nrf_twi_tasks_t	task
	)

Function for activating a specific TWI task.

Parameters

[in]	p_twi	TWI instance.
[in]	task	Task.

__STATIC_INLINE void nrf_twi_txd_set	(	NRF_TWI_Type *	p_twi,
		uint8_t	data
	)

Function for writing data to TWI.

Parameters

[in]	p_twi	TWI instance.
[in]	data	Data to be transmitted.

Enumerations

Functions

Detailed Description

Enumeration Type Documentation

Function Documentation