Module for reliable communication over UARTE. More...

Modules
	libUARTE_async library configuration

Data Structures
struct	nrf_libuarte_async_data_t
	Structure for libuarte async transfer completion event. More...

struct	nrf_libuarte_async_overrun_err_evt_t
	Structu for software error event. More...

struct	nrf_libuarte_async_evt_t
	Structure for libuarte error event. More...

struct	nrf_libuarte_async_config_t
	Structure for libuarte async configuration. More...

struct	nrf_libuarte_async_ctrl_blk_t
	nrf_libuarte_async control block (placed in RAM). More...

struct	nrf_libuarte_app_timer_ctrl_blk_t

struct	nrf_libuarte_async_t
	nrf_libuarte_async instance structure (placed in ROM). More...

Macros
#define	NRF_LIBUARTE_ASYNC_WITH_APP_TIMER 0

#define	NRF_LIBUARTE_PERIPHERAL_NOT_USED 255

#define	LIBUARTE_ASYNC_DEBRACKET(...) __VA_ARGS__

#define	__LIBUARTE_ASYNC_ARG_2(ignore_this, val,...) val

#define	__LIBUARTE_ASYNC_ARG_2_DEBRACKET(ignore_this, val,...) LIBUARTE_ASYNC_DEBRACKET val

#define	_LIBUARTE_ASYNC_EVAL(_eval_flag, _iftrue, _iffalse) _LIBUARTE_ASYNC_EVAL1(_eval_flag, _iftrue, _iffalse)

#define	_LIBUARTE_ASYNC_EVAL1(_eval_flag, _iftrue, _iffalse) _LIBUARTE_ASYNC_EVAL2(_LIBUARTE_ASYNC_ZZZZ##_eval_flag, _iftrue, _iffalse)

#define	_LIBUARTE_ASYNC_ZZZZ1 _LIBUARTE_ASYNC_YYYY,

#define	_LIBUARTE_ASYNC_EVAL2(one_or_two_args, _iftrue, _iffalse) __LIBUARTE_ASYNC_ARG_2_DEBRACKET(one_or_two_args _iftrue, _iffalse)

#define	NRF_LIBUARTE_ASYNC_DEFINE(_name, _uarte_idx, _timer0_idx, _rtc1_idx, _timer1_idx, _rx_buf_size, _rx_buf_cnt)
	Macro for creating instance of libuarte_async. More...

Typedefs
typedef void(*	nrf_libuarte_async_evt_handler_t )(void context, nrf_libuarte_async_evt_t p_evt)
	Interrupt event handler. More...

Enumerations
enum	nrf_libuarte_async_evt_type_t { NRF_LIBUARTE_ASYNC_EVT_RX_DATA, NRF_LIBUARTE_ASYNC_EVT_TX_DONE, NRF_LIBUARTE_ASYNC_EVT_ERROR, NRF_LIBUARTE_ASYNC_EVT_OVERRUN_ERROR }
	Types of libuarte driver events. More...

enum	nrf_libuarte_async_ppi_channel_t { NRF_LIBUARTE_ASYNC_PPI_CH_RXRDY_CLEAR, NRF_LIBUARTE_ASYNC_PPI_CH_COMPARE_SHUTDOWN, NRF_LIBUARTE_ASYNC_PPI_CH_MAX }

Functions
void	nrf_libuarte_async_timeout_handler (const nrf_libuarte_async_t *p_libuarte)

ret_code_t	nrf_libuarte_async_init (const nrf_libuarte_async_t const p_libuarte, nrf_libuarte_async_config_t const p_config, nrf_libuarte_async_evt_handler_t evt_handler, void *context)
	Function for initializing the libuarte async library. More...

void	nrf_libuarte_async_uninit (const nrf_libuarte_async_t *const p_libuarte)
	Function for uninitializing the libuarte async library. More...

void	nrf_libuarte_async_enable (const nrf_libuarte_async_t *const p_libuarte)
	Function for enabling receiver. More...

void	nrf_libuarte_async_rts_clear (const nrf_libuarte_async_t *const p_libuarte)
	Function for deasserting RTS to pause the transmission. More...

void	nrf_libuarte_async_rts_set (const nrf_libuarte_async_t *const p_libuarte)
	Function for asserting RTS to restart the transmission. More...

ret_code_t	nrf_libuarte_async_tx (const nrf_libuarte_async_t const p_libuarte, uint8_t p_data, size_t length)
	Function for sending data asynchronously over UARTE. More...

void	nrf_libuarte_async_rx_free (const nrf_libuarte_async_t const p_libuarte, uint8_t p_data, size_t length)
	Function for deallocating received buffer data. More...

Detailed Description

Module for reliable communication over UARTE.

Macro Definition Documentation

#define NRF_LIBUARTE_ASYNC_DEFINE	(	_name,
		_uarte_idx,
		_timer0_idx,
		_rtc1_idx,
		_timer1_idx,
		_rx_buf_size,
		_rx_buf_cnt
	)

Macro for creating instance of libuarte_async.

Libuarte_async requires one timer-like peripheral (RTC or TIMER) for triggering RX timeout. Macro will create instance only for peripheral which is used.

Parameters

_name	Instance name.
_uarte_idx	UARTE instance used.
_timer0_idx	TIMER instance used by libuarte for bytes counting.
_rtc1_idx	RTC instance used for timeout. If set to NRF_LIBUARTE_PERIPHERAL_NOT_USED then TIMER instance is used or app_timer instance if _timer1_idx is also set to NRF_LIBUARTE_PERIPHERAL_NOT_USED.
_timer1_idx	TIMER instance used for timeout. If set to NRF_LIBUARTE_PERIPHERAL_NOT_USED then RTC instance is used or app_timer instance if _rtc1_idx is also set to NRF_LIBUARTE_PERIPHERAL_NOT_USED.
_rx_buf_size	Size of single RX buffer. Size impacts accepted latency between buffer request and providing next buffer. Next must be provided within before _rx_buf_size bytes is received.
_rx_buf_cnt	Number of buffers in the RX buffer pool. Size impacts accepted latency between NRF_LIBUARTE_ASYNC_EVT_RX_DATA event and nrf_libuarte_async_rx_free.

Typedef Documentation

typedef void(* nrf_libuarte_async_evt_handler_t)(void *context, nrf_libuarte_async_evt_t *p_evt)

Interrupt event handler.

Parameters

[in] p_evt Pointer to event structure. Event is allocated on the stack so it is available only within the context of the event handler.

Enumeration Type Documentation

enum nrf_libuarte_async_evt_type_t

Types of libuarte driver events.

Enumerator
NRF_LIBUARTE_ASYNC_EVT_RX_DATA	Requested TX transfer completed.
NRF_LIBUARTE_ASYNC_EVT_TX_DONE	Requested RX transfer completed.
NRF_LIBUARTE_ASYNC_EVT_ERROR	Error reported by UARTE peripheral.
NRF_LIBUARTE_ASYNC_EVT_OVERRUN_ERROR	Error reported by the driver.

Function Documentation

void nrf_libuarte_async_enable ( const nrf_libuarte_async_t *const p_libuarte )

Function for enabling receiver.

Parameters

p_libuarte Libuarte_async instance.

ret_code_t nrf_libuarte_async_init	(	const nrf_libuarte_async_t *const	p_libuarte,
		nrf_libuarte_async_config_t const *	p_config,
		nrf_libuarte_async_evt_handler_t	evt_handler,
		void *	context
	)

Function for initializing the libuarte async library.

Parameters

[in]	p_libuarte	Libuarte_async instance.
[in]	p_config	Pointer to the structure with initial configuration.
[in]	evt_handler	Event handler provided by the user. Must not be NULL.
[in]	context	User context passed to the event handler.

Returns: NRF_SUCCESS when properly initialized. NRF_ERROR_INTERNAL otherwise.

void nrf_libuarte_async_rts_clear ( const nrf_libuarte_async_t *const p_libuarte )

Function for deasserting RTS to pause the transmission.

Flow control must be enabled.

Parameters

p_libuarte Libuarte_async instance.

void nrf_libuarte_async_rts_set ( const nrf_libuarte_async_t *const p_libuarte )

Function for asserting RTS to restart the transmission.

Flow control must be enabled.

Parameters

p_libuarte Libuarte_async instance.

void nrf_libuarte_async_rx_free	(	const nrf_libuarte_async_t *const	p_libuarte,
		uint8_t *	p_data,
		size_t	length
	)

Function for deallocating received buffer data.

Parameters

[in]	p_libuarte	Libuarte_async instance.
[in]	p_data	Pointer to data.
[in]	length	Number of bytes to free.

ret_code_t nrf_libuarte_async_tx	(	const nrf_libuarte_async_t *const	p_libuarte,
		uint8_t *	p_data,
		size_t	length
	)

Function for sending data asynchronously over UARTE.

Parameters

[in]	p_libuarte	Libuarte_async instance.
[in]	p_data	Pointer to data.
[in]	length	Number of bytes to send. Maximum possible length is dependent on the used SoC (see the MAXCNT register description in the Product Specification). The library checks it with assertion.

Return values

NRF_ERROR_BUSY	Data is transferring.
NRF_ERROR_INTERNAL	Error during configuration.
NRF_SUCCESS	Buffer set for sending.

void nrf_libuarte_async_uninit ( const nrf_libuarte_async_t *const p_libuarte )

Function for uninitializing the libuarte async library.

Parameters

[in] p_libuarte Libuarte_async instance.

Modules

Data Structures

Macros

Typedefs

Enumerations

Functions

Detailed Description

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation