Atmel QTouch Library User Guide

touch_qt_get_libinfotouch_ret_t touch_qt_get_libinfo(touch_qt_grp_t touch_qt_grp,touch_info_t *p_touch_info)Arguments Type Commenttouch_qt_grp touch_qt_grp_t Specify if the operation is to be performed on Group A Sensorsor Group B Sensors.p_touch_infotouch_info_t*User passes the memory address at which the libraryinformation is to be stored by the library.• The touch_info_t structure is filled by the library with the Group specific (based ontouch_qt_grp input) information like number of QTouch channels, number of QTouchsensors, number of QTouch rotors/slider, CAT hardware version, and library version.• The QTouch number of channels, sensors and rotors/slider indicate the total number ofchannels, sensors and rotor/slider in use irrespective of Touch measured being disabledor enabled. (Disabling and Re-enabling of a Sensor using the touch_qt_sensor_disableand touch_qt_sensor_reenable API does not alter these values).touch_qt_sensor_get_deltatouch_ret_t touch_qt_sensor_get_delta(touch_qt_grp_t touch_qt_grp,sensor_id_t sensor_id,touch_delta_t *p_delta)Arguments Type Commentsensor_id sensor_id_t Sensor ID for which the delta needs to be retrieved.p_delta touch_delta_t* Pointer to Delta variable, that will be update by the Touch Library• This API retrieves the delta information associated with a specific QTouch sensor. Deltais the difference between the current signal value and reference value.• The user must provide the sensor ID whose delta is sought along with a valid pointer to aDelta variable.• The API updates the delta variable associated with the requested sensor.Autonomous touch APIThis section lists the functions that are specific to Autonomous QTouch sensor.touch_at_sensor_inittouch_ret_t touch_at_sensor_init( touch_config_t *p_touch_config )Arguments Type Commentp_touch_config touch_config_t* Pointer to Touch Library input configuration structure. Thep_at_config and p_general_config members of the inputconfiguration structure must be non-NULL.1648207K-AT42-09/11