#include "compiler.h"
#include "conf_example.h"
#include "gpio.h"
#include "sysclk.h"
#include "tc.h"
#include "intc.h"
#include "touch_api.h"

Macros
#define	PORTA (((volatile avr32_gpio_port_t *) &AVR32_GPIO) + 0)

#define	PORTB (((volatile avr32_gpio_port_t *) &AVR32_GPIO) + 1)

#define	PORTC (((volatile avr32_gpio_port_t *) &AVR32_GPIO) + 2)

SENSOR STATE CONFIGURATIONS
#define	GET_SENSOR_STATE(SENSOR_NUMBER) qt_measure_data.qt_touch_status.sensor_states[(SENSOR_NUMBER/8)] & (1 << (SENSOR_NUMBER % 8))
	To get the sensor state that it is in detect or not. More...

#define	GET_ROTOR_SLIDER_POSITION(ROTOR_SLIDER_NUMBER) qt_measure_data.qt_touch_status.rotor_slider_values[ROTOR_SLIDER_NUMBER]
	To get the rotor angle or slider position. More...

Functions
static void	config_keys (void)
	prototypes for rotor_slider configuration for various channels More...

static void	config_sensors (void)
	Configure the sensors. More...

static void	init_timer_isr (void)
	Configures ISR to fire regularly. More...

	ISR (tc_irq, GRP, LVL)
	TIMER ISR. More...

int	main (void)
	Main Application Code. More...

int16_t	qt_get_sensor_delta (uint8_t sensor)
	Get sensor delta values. More...

static void	qt_set_parameters (void)
	Initializes configuration data for processing. More...

static void	qtouch_init (void)
	Initializes the necessary parameters for QTouch library. More...

Variables
static volatile uint16_t	current_time_ms_touch = 0u

qt_touch_lib_measure_data_t *	pqt_measure_data = &qt_measure_data
	Output can be observed in the watch window using this pointer. More...

qt_touch_lib_config_data_t	qt_config_data
	This configuration data structure parameters if needs to be changed will be changed in the qt_set_parameters function. More...

qt_touch_lib_measure_data_t	qt_measure_data
	Touch Measurement data. More...

uint16_t	qt_measurement_period_msec = 25u
	timer period in msec. More...

static volatile uint8_t	time_to_measure_touch = 0u

uint16_t	timestamp1_hword

uint16_t	timestamp1_lword

uint16_t	timestamp2_hword

uint16_t	timestamp2_lword

uint16_t	timestamp3_hword

uint16_t	timestamp3_lword

#define GET_ROTOR_SLIDER_POSITION ( ROTOR_SLIDER_NUMBER ) qt_measure_data.qt_touch_status.rotor_slider_values[ROTOR_SLIDER_NUMBER]

To get the rotor angle or slider position.

These values are valid only when the sensor state for corresponding rotor or slider shows in detect.

Parameters

ROTOR_SLIDER_NUMBER for which the position to be known

Returns: Returns rotor angle or sensor position

#define GET_SENSOR_STATE ( SENSOR_NUMBER ) qt_measure_data.qt_touch_status.sensor_states[(SENSOR_NUMBER/8)] & (1 << (SENSOR_NUMBER % 8))

To get the sensor state that it is in detect or not.

Parameters

SENSOR_NUMBER for which the state to be detected

Returns: Returns either 0 or 1 If the bit value is 0, it is not in detect If the bit value is 1, it is in detect

#define PORTA (((volatile avr32_gpio_port_t *) &AVR32_GPIO) + 0)

#define PORTB (((volatile avr32_gpio_port_t *) &AVR32_GPIO) + 1)

#define PORTC (((volatile avr32_gpio_port_t *) &AVR32_GPIO) + 2)

static void config_keys ( void )

static

prototypes for rotor_slider configuration for various channels

Configure the sensors as keys only.

Configure the sensors for Keys configuration

Referenced by config_sensors().

static void config_sensors ( void )

static

Configure the sensors.

Configure the QTouch sensors.

References config_keys().

Referenced by qtouch_init().

void init_timer_isr ( void )

static

Configures ISR to fire regularly.

Function to initialize the Timer/Counter module in Waveform mode.

It fires the ISR at regular intervals to start QTouch Acquisition.

References tc_waveform_opt_t::channel, tc_interrupt_t::etrgs, irq_initialize_vectors, irq_register_handler, sysclk_get_pba_hz(), TC_CHANNEL, tc_configure_interrupts(), TC_EVT_EFFECT_NOOP, tc_init_waveform(), tc_irq(), TC_SEL_NO_EDGE, tc_start(), TC_WAVEFORM_SEL_UP_MODE_RC_TRIGGER, and tc_write_rc().

Referenced by main().

ISR	(	tc_irq	,
		GRP	,
		LVL
	)

TIMER ISR.

Parameters

tc_irq	is the subroutine function name
GRP	is the group under which the interrupt lies
LVL	is the priority level assigned for the group

References current_time_ms_touch, qt_measurement_period_msec, TC_CHANNEL, tc_read_sr(), and time_to_measure_touch.

int main ( void )

Main Application Code.

Initialize the system clocks
Initialize the touch functions
Initialize the timer
if debug interface is enabled, initialize the qdebug commmands
When touch status in detect, Set the led & send data to QTouch Studio

Initialize the system clock Clock settings are done in cof_clock.h It sets the cpu to run at crystal frequency which uses OSC0 as souce

Initializes the functions necessary for QTouch

Configure the timer ISR to fire regularly for QTouch Acquisition

Address to pass address of user functions

This function is called after the library has made capacitive measurements, but before it has processed them. The user can use this hook to apply filter functions to the measured signal values.(Possibly to fix sensor layout faults)

References cpu_irq_enable, current_time_ms_touch, gpio_clr_gpio_pin(), gpio_set_gpio_pin(), init_timer_isr(), qt_filter_callback, qt_measure_sensors(), tag_qt_touch_lib_measure_data_t::qt_touch_status, QTLIB_BURST_AGAIN, qtouch_init(), tag_qt_touch_status_t::sensor_states, sysclk_init(), and time_to_measure_touch.

int16_t qt_get_sensor_delta ( uint8_t sensor )

Get sensor delta values.

static void qt_set_parameters ( void )

static

Initializes configuration data for processing.

Initialize configuration data for processing This will fill the default threshold values in the configuration data structure.But User can change the values of these parameters.

This will fill the default threshold values in the configuration data structure.But User can change the values of these parameters. Values can be changed in "touch_api.h"

Values can be changed in "touch_api.h"

This can be modified by the user to different values

References DEF_QT_DI, DEF_QT_DRIFT_HOLD_TIME, DEF_QT_MAX_ON_DURATION, DEF_QT_NEG_DRIFT_RATE, DEF_QT_POS_DRIFT_RATE, DEF_QT_POS_RECAL_DELAY, DEF_QT_RECAL_THRESHOLD, tag_qt_touch_lib_config_data_t::qt_di, tag_qt_touch_lib_config_data_t::qt_drift_hold_time, tag_qt_touch_lib_config_data_t::qt_max_on_duration, tag_qt_touch_lib_config_data_t::qt_neg_drift_rate, tag_qt_touch_lib_config_data_t::qt_pos_drift_rate, tag_qt_touch_lib_config_data_t::qt_pos_recal_delay, and tag_qt_touch_lib_config_data_t::qt_recal_threshold.