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RECAL_100
RECAL_50
RECAL_25
RECAL_12_5
RECAL_6_25
100% recalibration threshold
50% recalibration threshold
25% recalibration threshold
12.5% recalibration threshold
6.25% recalibration threshold
5.6.4 Data structures
This section lists the data structures that hold sensor status, settings, and diagnostics information
5.6.4.1
qt_touch_status_t
Structure
Input / Output
Use
Fields
sensor_states[]
qt_touch_status_t
Output from the Library
Holds the status ( On/ Off ) of the sensors and the linear and angular positions
of sliders and rotors respectively
Comment
For Sensor, the sensor_states. Bit “n” = state of nth sensor :
Bit Value 0 - indicates the sensor is not in detect
Bit Value 1 - indicates the sensor is in detect
rotor_slider_values[]
Rotors angles or slider positions if rotors and sliders are used. These
values are valid when sensor states shows that the corresponding rotor or
slider is in detect
The macro that can get the sensor state when the sensor number is provided can be something
as below:
#define
GET_SENSOR_STATE(SENSOR_NUMBER)
qt_measure_data.qt_touch_status.sensor_states[(SENSOR_NUMBER/8)] &
(1 << (SENSOR_NUMBER % 8))
The host application can use this macro to act accordingly, the following example shows how to
toggle a IO pin (PD2) based on the sensor0 state.( Set PD2 if sensor0 is in detect, and clear PD2
if sensor0 is not in detect)
Ex:
/*Set pin PD2 direction as output*/
DDRD |= (1u << PORTD2);
if (GET_SENSOR_STATE(0) !=0)
{
PORTD |= (1u << PORTD2); /* Set PORTD2 */
}
else {
PORTD &= ~(1u << PORTD2); /* Clear PORTD2 */
}
5.6.4.2
qt_touch_lib_config_data_t
Structure
Input / Output
qt_touch_lib_config_data_t
Input to the library
25
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