Atmel QTouch Library User Guide

(channel_signals, channel_references, sensor_states, sensors structure) as well as theTouch Status (sensor_states) and Rotor/Slider position (rotor_slider_values).• The touch_event_dispatcher API needs to be called as frequently as possible for theTouch Library to process the raw acquisition data.• When raw data acquisition mode is used, once the raw acquisition data is available fromthe CAT module for all the sensors, the measure_complete_callback function isimmediately called with acquisition data (channel_signals). The channel_references,sensor_states and rotor_slider_values data are not updated by the Touch Library in thismode.• This API will return error if a Touch measurement is already in progress.• One peripheral DMA channels must be provided using p_touch_dma for QTouchoperation.touch_qt _sensor_ disabletouch_ret_t touch_qt_ sensor_disable(touch_qt_grp_t touch_qt_grp,sensor_id_t sensor_id)Arguments Type Commenttouch_qt_grp touch_qt_grp_t Specify if the operation is to be performed on Group A Sensorsor Group B Sensors.sensor_id sensor_id_t Sensor ID of the Sensor to be disabled.• This API can be used to disable Touch measurement on a QTouch Sensor.• The touch_qt_sensors_calibrate API needs to be called whenever one or more Sensorsare disabled before starting a new Touch measurement using thetouch_qt_sensors_start_acquisition API.• Note: Care must be taken such that a valid Sensor ID corresponding to a QTouch GroupA sensor or QTouch Group B Sensor is provided.touch_qt _sensor_ reenabletouch_ret_t touch_qt _sensor_reenable(touch_qt_grp_t touch_qt_grp,sensor_id_t sensor_id)Arguments Type Commenttouch_qt_grp touch_qt_grp_t Specify if the operation is to be performed on Group A Sensorsor Group B Sensors.sensor_id sensor_id_t Sensor ID of the Sensor to be disabled.• This API can be used to reenable a disabled QTouch Sensor.• The touch_qt_sensors_calibrate API needs to be called whenever one or more Sensorsare reenabled before starting a new Touch measurement using thetouch_qt_sensors_start_acquisition API.• Note: Care must be taken such that a valid Sensor ID corresponding to a QTouch GroupA sensor or QTouch Group B Sensor is provided.163