Files
file	button-sensor.c
	Driver for nRF52 DK buttons.

file	button-sensor.h
	Header file for the nRF52dk button driver.

Macros
#define	DEBOUNCE_DURATION (CLOCK_SECOND >> 5)
	Delay before button state is assumed to be stable.

#define	BUTTON_SENSOR_VALUE_STATE 0
	Can be passed to value() function to get current button state.

#define	BUTTON_SENSOR_VALUE_DURATION 1
	Can be passed to value() function to get low state duration.

Functions
static void	gpiote_event_handler (nrf_drv_gpiote_pin_t pin, nrf_gpiote_polarity_t action)
	Button toggle handler. More...

static int	config (int type, int c, nrf_drv_gpiote_pin_t pin)
	Configuration function for the button sensor for all buttons. More...

static int	config_button_1 (int type, int value)
	Configuration function for button 1. More...

static int	config_button_2 (int type, int value)
	Configuration function for button 2. More...

static int	config_button_3 (int type, int value)
	Configuration function for button 3. More...

static int	config_button_4 (int type, int value)
	Configuration function for button 4. More...

static int	value (int type, nrf_drv_gpiote_pin_t pin)
	Return current state of a button. More...

static int	value_button_1 (int type)
	Return current state of a button 1. More...

static int	value_button_2 (int type)
	Return current state of a button 2. More...

static int	value_button_3 (int type)
	Return current state of a button 3. More...

static int	value_button_4 (int type)
	Return current state of a button 4. More...

static int	status (int type, nrf_drv_gpiote_pin_t pin)
	Get status of a given button. More...

static int	status_button_1 (int type)
	Status function for button 1. More...

static int	status_button_2 (int type)
	Status function for button 2. More...

static int	status_button_3 (int type)
	Status function for button 3. More...

static int	status_button_4 (int type)
	Status function for button 3. More...

Detailed Description

Function Documentation

static int config	(	int	type,
		int	c,
		nrf_drv_gpiote_pin_t	pin
	)

static

Configuration function for the button sensor for all buttons.

Parameters

type	if SENSORS_HW_INIT is passed the function will initialize given button if SENSORS_ACTIVE is passed then `c` parameter defines whether button should be set active or inactive
c	0 to disable the button, non-zero: enable
pin	GPIOE pin number

Definition at line 111 of file button-sensor.c.

References DEBOUNCE_DURATION, gpiote_event_handler(), and timer_set().

Referenced by config_button_1(), config_button_2(), config_button_3(), and config_button_4().

static int config_button_1	(	int	type,
		int	value
	)

static

Configuration function for button 1.

Parameters

type	passed to config() as-is
value	passed to config() as-is

Returns: same as config() return value

Definition at line 146 of file button-sensor.c.

References config().

static int config_button_2	(	int	type,
		int	value
	)

static

Configuration function for button 2.

Parameters

type	passed to config() as-is
value	passed to config() as-is

Returns: same as config() return value

Definition at line 159 of file button-sensor.c.

References config().

static int config_button_3	(	int	type,
		int	value
	)

static

Configuration function for button 3.

Parameters

type	passed to config() as-is
value	passed to config() as-is

Returns: same as config() return value

Definition at line 172 of file button-sensor.c.

References config().

static int config_button_4	(	int	type,
		int	value
	)

static

Configuration function for button 4.

Parameters

type	passed to config() as-is
value	passed to config() as-is

Returns: same as config() return value

Definition at line 185 of file button-sensor.c.

References config().

static void gpiote_event_handler	(	nrf_drv_gpiote_pin_t	pin,
		nrf_gpiote_polarity_t	action
	)

static

Button toggle handler.

Parameters

pin	GPIO pin which has been triggered
action	toggle direction

Definition at line 75 of file button-sensor.c.

References clock_time(), DEBOUNCE_DURATION, timer_expired(), and timer_set().

Referenced by config().

static int status	(	int	type,
		nrf_drv_gpiote_pin_t	pin
	)

static

Get status of a given button.

Parameters

type	SENSORS_ACTIVE or SENSORS_READY
pin	GPIOE pin number

Returns: 1 if the button's port interrupt is enabled

Definition at line 265 of file button-sensor.c.

Referenced by status_button_1(), status_button_2(), status_button_3(), and status_button_4().

static int status_button_1 ( int type )

static

Status function for button 1.

Parameters

type	passed to state() as-is

Returns: value returned by state()

Definition at line 283 of file button-sensor.c.

References status().

static int status_button_2 ( int type )

static

Status function for button 2.

Parameters

type	passed to state() as-is

Returns: value returned by state()

Definition at line 294 of file button-sensor.c.

References status().

static int status_button_3 ( int type )

static

Status function for button 3.

Parameters

type	passed to state() as-is

Returns: value returned by state()

Definition at line 305 of file button-sensor.c.

References status().

static int status_button_4 ( int type )

static

Status function for button 3.

Parameters

type	passed to state() as-is

Returns: value returned by state()

Definition at line 316 of file button-sensor.c.

References status().

static int value	(	int	type,
		nrf_drv_gpiote_pin_t	pin
	)

static

Return current state of a button.

Parameters

type	pass BUTTON_SENSOR_VALUE_STATE to get current button state or BUTTON_SENSOR_VALUE_DURATION to get active state duration
pin	GPIOE pin number

Return values

BUTTON_SENSOR_VALUE_PRESSED
BUTTON_SENSOR_VALUE_RELEASED	when type is BUTTON_SENSOR_VALUE_STATE
duration	Active state duration in clock ticks

Definition at line 201 of file button-sensor.c.

References BUTTON_SENSOR_VALUE_DURATION, and BUTTON_SENSOR_VALUE_STATE.

Referenced by value_button_1(), value_button_2(), value_button_3(), and value_button_4().

static int value_button_1 ( int type )

static

Return current state of a button 1.

Parameters

type	passed to value() as-is

Returns: same as value returned by value()

Definition at line 220 of file button-sensor.c.

References value().

static int value_button_2 ( int type )

static

Return current state of a button 2.

Parameters

type	passed to value() as-is

Returns: same as value returned by value()

Definition at line 231 of file button-sensor.c.

References value().

static int value_button_3 ( int type )

static

Return current state of a button 3.

Parameters

type	passed to value() as-is

Returns: same as value returned by value()

Definition at line 242 of file button-sensor.c.

References value().

static int value_button_4 ( int type )

static

Return current state of a button 4.

Parameters

type	passed to value() as-is

Returns: same as value returned by value()

Definition at line 253 of file button-sensor.c.

References value().

Files

Macros

Functions

Detailed Description

Function Documentation