drivers/touch/resistive/touch.c File Reference

4-wire resistive touch driver general implementation. More...

#include <assert.h>
#include <interrupt.h>
#include <pmic.h>
#include <intc.h>
#include <touch/touch.h>
#include <cpu/touch/resistive/touch.h>

Go to the source code of this file.

Enumerations
enum	touch_states {   TOUCH_DISABLED, TOUCH_NOT_TOUCHED, TOUCH_READING_X, TOUCH_READING_Y,   TOUCH_PROCESSING, TOUCH_TOUCHED }
	Driver state names. More...
Functions
static void	touch_priv_port_handler (void *int_data)
	Interrupt handler for touch detection.
static void	touch_priv_adc_handler (void *int_data)
	Interrupt handler for AD conversions.
static void	touch_priv_process_samples (void *int_data)
	Process touch samples.
void	touch_init (void)
	Initialize the touch driver.
void	touch_enable (void)
	Enable touch detection and sampling.
void	touch_disable (void)
	Disable touch detection and sampling.
void	touch_get_event (struct touch_event *buffer)
	Get last detected touch event from driver to buffer.
bool	touch_is_touched (void)
	Return current state of touch driver.
void	touch_set_event_handler (touch_event_handler_t handler)
	Set touch event handler for driver.
touch_event_handler_t	touch_get_event_handler (void)
	Get current touch event handler from driver.
void	touch_set_calibration_matrix (const struct touch_calibration_matrix *matrix)
	Assign a calibration matrix to the driver.
void	touch_get_calibration_matrix (struct touch_calibration_matrix *buffer)
	Copy calibration matrix from driver to a buffer.
void	touch_compute_calibration_matrix (const touch_calibration_points_t points, struct touch_calibration_matrix *matrix)
	Compute a calibration matrix.
Definition of interrupt handlers for touch detection and reading
	INTC_DEFINE_HANDLER (CONFIG_TOUCH_PORT_IRQ_ID, touch_priv_port_handler, CONFIG_TOUCH_PORT_INTLVL)
	INTC_DEFINE_HANDLER (CONFIG_TOUCH_ADC_IRQ_ID, touch_priv_adc_handler, CONFIG_TOUCH_ADC_INTLVL)
Variables
static enum touch_states	touch_state
	Current driver state.
static struct touch_event	touch_last_event
	Last detected touch event.
static uint16_t	touch_raw_x
	Temporary raw sample value for X surface.
static uint16_t	touch_raw_y
	Temporary raw sample value for Y surface.
static struct touch_calibration_matrix	touch_matrix
	Calibration matrix for the driver.
touch_event_handler_t	touch_event_handler
	Current touch event handler (set to NULL if no handler should be called).

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Detailed Description

4-wire resistive touch driver general implementation.

Copyright (C) 2009 Atmel Corporation. All rights reserved.

Definition in file touch.c.