touch_dev_driver_t Struct Reference

Generic type for a touch driver. More...

Detailed Description

Generic type for a touch driver.

Definition at line 59 of file touch_dev.h.

#include <touch_dev.h>

Data Fields
uint16_t(*	height )(const touch_dev_t *dev)
	Get the height of the touch device.
uint16_t(*	width )(const touch_dev_t *dev)
	Get the width of the touch device.
uint8_t(*	max_numof )(const touch_dev_t *dev)
	Get the maximum number of touches the touch device supports.
uint8_t(*	touches )(const touch_dev_t *dev, touch_t *touches, size_t len)
	Get the current touches on the touch device.
void(*	set_event_callback )(const touch_dev_t *dev, touch_event_cb_t cb, void *arg)
	Set and configure the touch event callback.

Field Documentation

height

uint16_t(* touch_dev_driver_t::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

Definition at line 68 of file touch_dev.h.

max_numof

uint8_t(* touch_dev_driver_t::max_numof) (const touch_dev_t *dev)

Get the maximum number of touches the touch device supports.

This function pointer can be NULL. In this case, the maximum number of touches is assumed to be 1.

Parameters

[in]

dev

Pointer to the touch device

Returns

number of touches

Definition at line 89 of file touch_dev.h.

set_event_callback

void(* touch_dev_driver_t::set_event_callback) (const touch_dev_t *dev, touch_event_cb_t cb, void *arg)

Set and configure the touch event callback.

Parameters

[in]	dev	Pointer to the touch device
[in]	cb	The callback function
[in]	arg	Context argument

Definition at line 110 of file touch_dev.h.

touches

uint8_t(* touch_dev_driver_t::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.

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

Definition at line 101 of file touch_dev.h.

width

uint16_t(* touch_dev_driver_t::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

Definition at line 77 of file touch_dev.h.

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The documentation for this struct was generated from the following file:

• drivers/include/touch_dev.h