hdw-btn.c File Reference

Data Structures
struct	timedEvt_t
	A timestamped button event. More...

Macros
#define	DEBOUNCE_HIST_LEN   5
	The number of samples kept in history to debounce buttons.
#define	TOUCH_CENTER   2
#define	NUM_TZ_RING   5

Functions
void	initButtons (const gpio_num_t *pushButtons, uint8_t numPushButtons, const touch_pad_t *touchPads, uint8_t numTouchPads)
	Initialize both pushbuttons and touch buttons.
void	deinitButtons (void)
	Free memory used by the buttons.
void	powerDownButtons (void)
	Power down the touchpad and buttons.
void	powerUpButtons (void)
	Power up the touchpad and buttons.
bool	checkButtonQueue (buttonEvt_t *evt)
	Service the queue of button events that caused interrupts This only returns a single event, even if there are multiple in the queue This function may be called multiple times in a row to completely empty the queue.
int	getTouchJoystick (int32_t *phi, int32_t *r, int32_t *intensity)
	Get high-level touch input, an analog input. NOTE: You must have touch callbacks enabled to use this.

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Data Structure Documentation

timedEvt_t

struct timedEvt_t

Data Fields
int32_t	state
int32_t	time	The button state.

Macro Definition Documentation

DEBOUNCE_HIST_LEN

#define DEBOUNCE_HIST_LEN   5

The number of samples kept in history to debounce buttons.

TOUCH_CENTER

#define TOUCH_CENTER   2

NUM_TZ_RING

#define NUM_TZ_RING   5

Function Documentation

initButtons()

void initButtons	(	const gpio_num_t *	pushButtons,
		uint8_t	numPushButtons,
		const touch_pad_t *	touchPads,
		uint8_t	numTouchPads )

Initialize both pushbuttons and touch buttons.

Parameters

pushButtons	A list of GPIOs with pushbuttons to initialize. The list should be in the same order as buttonBit_t, starting at PB_UP
numPushButtons	The number of pushbuttons to initialize
touchPads	A list of touch areas that make up a touchPad to initialize.
numTouchPads	The number of touch buttons to initialize

deinitButtons()

void deinitButtons

(

void

)

Free memory used by the buttons.

powerDownButtons()

void powerDownButtons

(

void

)

Power down the touchpad and buttons.

powerUpButtons()

void powerUpButtons

(

void

)

Power up the touchpad and buttons.

checkButtonQueue()

bool checkButtonQueue

(

buttonEvt_t *

evt

)

Service the queue of button events that caused interrupts This only returns a single event, even if there are multiple in the queue This function may be called multiple times in a row to completely empty the queue.

Parameters

evt	If an event occurred, return it through this argument

Returns

true if an event occurred, false if nothing happened

getTouchJoystick()

int getTouchJoystick	(	int32_t *	phi,
		int32_t *	r,
		int32_t *	intensity )

Get high-level touch input, an analog input. NOTE: You must have touch callbacks enabled to use this.

Parameters

[out]	phi	the angle of the touch. Where 0 is right, 320 is up, 640 is left and 960 is down.
[out]	r	is how far from center you are. 511 is on the outside edge, 0 is on the inside.
[out]	intensity	is how hard the user is pressing.

Returns

true if touched (joystick), false if not touched (no centroid)