Touch device generic API

Define the generic API of a touch device. More...

Detailed Description

Define the generic API of a touch device.

Warning

This feature is experimental!
This API is experimental and in an early state - expect changes!

Author

Alexandre Abadie alexa.nosp@m.ndre.nosp@m..abad.nosp@m.ie@i.nosp@m.nria..nosp@m.fr

Data Structures
struct	touch_t
	Touch coordinates. More...
struct	touch_dev_driver_t
	Generic type for a touch driver. More...
struct	touch_dev
	Generic type for a touch device. More...

Typedefs
typedef struct touch_dev	touch_dev_t
	Forward declaration for touch device struct.

Functions
uint16_t	touch_dev_height (const touch_dev_t *dev)
	Get the height of the touch device. More...
uint16_t	touch_dev_width (const touch_dev_t *dev)
	Get the width of the touch device. More...
uint8_t	touch_dev_touches (const touch_dev_t *dev, touch_t *touches, size_t len)
	Get the current touches on the touch device. More...

Function Documentation

touch_dev_height()

uint16_t touch_dev_height

(

const touch_dev_t *

dev

)

Get the height of the touch device.

Parameters

[in]

dev

Pointer to the touch device

Returns

Height in points

touch_dev_touches()

uint8_t touch_dev_touches	(	const touch_dev_t *	dev,
		touch_t *	touches,
		size_t	len
	)

Get the current touches on the touch device.

If touches is NULL, this function only returns the number of touches.

Touch position coordinates use the top left corner as origin.

Parameters

[in]	dev	Pointer to the touch device
[out]	touches	The array of touches
[in]	len	The touches array len

Returns

number of touch positions, 0 means no touch

touch_dev_width()

uint16_t touch_dev_width

(

const touch_dev_t *

dev

)

Get the width of the touch device.

Parameters

[in]

dev

Pointer to the touch device

Returns

Width in points