Atmel QTouch Library User Guide
Atmel QTouch Library User Guide Atmel QTouch Library User Guide
sensor_type_tEnumerationUsesensor_type_tDefine the type of the sensorValuesSENSOR_TYPE_UNASSIGNEDSENSOR_TYPE_KEYSENSOR_TYPE_ROTORSENSOR_TYPE_SLIDERCommentChannel is not assigned to any sensorSensor is a keySensor is a rotorSensor is a slideraks_group_tEnumerationUseaks_group_tDefines the Adjacent Key Suppression (AKS) groups that each sensor may beassociated withAKS is selectable by the system designer7 AKS groups are supported by the libraryValuesCommentNO_AKS_GROUPNo AKS group is selected for the sensorAKS_GROUP_1 AKS Group number 1AKS_GROUP_2 AKS Group number 2AKS_GROUP_3 AKS Group number 3AKS_GROUP_4 AKS Group number 4AKS_GROUP_5 AKS Group number 5AKS_GROUP_6 AKS Group number 6AKS_GROUP_7 AKS Group number 7hysteresis_tEnumerationUseHysteresis_tDefines the sensor detection hysteresis value. This is expressed as apercentage of the sensor detection threshold.This is configurable per sensor.HYST_x = hysteresis value is x percent of detection threshold value (roundeddown).Note that a minimum value of 2 is used as a hard limit. Example: if detectionthreshold = 20, then:HYST_50 = 10 (50 percent of 20)HYST_25 = 5 (25 percent of 20)HYST_12_5 = 2 (12.5 percent of 20)HYST_6_25 = 2 (6.25 percent of 20 = 1, but set to the hard limit of 2)ValuesHYST_50HYST_25HYST_12_5HYST_6_25Comment50% Hysteresis25% Hysteresis12.5% Hysteresis6.25% Hysteresis1428207K-AT42-09/11
ecal_threshold_tEnumerationUserecal_threshold_tA sensor recalibration threshold. This is expressed as a percentage of thesensor detection threshold.This is for automatic recovery from false conditions, such as a calibration whilesensors were touched, or a significant step change in power supply voltage.If the false condition persists the library will recalibrate according to the settingsof the recalibration threshold.This setting is applicable to all the configured sensors.Usage :RECAL_x = recalibration threshold is x percent of detection threshold value(rounded down).Note: a minimum value of 4 is used.Example: if detection threshold = 40, then:RECAL_100 = 40 ( 100 percent of 40)RECAL_50 = 20 ( 50 percent of 40)RECAL_25 = 10 ( 25 percent of 40)RECAL_12_5 = 5 ( 12.5 percent of 40)RECAL_6_25 = 4 ( 6.25 percent of 40 = 2, but value is limited to 4)ValuesRECAL_100RECAL_50RECAL_25RECAL_12_5RECAL_6_25resolution_tEnumerationUseComment100% recalibration threshold50% recalibration threshold25% recalibration threshold12.5% recalibration threshold6.25% recalibration thresholdresolution_tFor rotors and sliders, the resolution of the reported angle or position.RES_x_BIT = rotor/slider reports x-bit values.Example: if slider resolution is RES_7_BIT, then reported positions are in therange 0..127.ValuesCommentRES_1_BIT 1 bit resolution : reported positions range 0 – 1RES_2_BIT 2 bit resolution : reported positions range 0 – 3RES_3_BIT 3 bit resolution : reported positions range 0 – 7RES_4_BIT 4 bit resolution : reported positions range 0 – 15RES_5_BIT 5 bit resolution : reported positions range 0 – 31RES_6_BIT 6 bit resolution : reported positions range 0 – 63RES_7_BIT 7 bit resolution : reported positions range 0 – 127RES_8_BIT 8 bit resolution : reported positions range 0 – 255at_status_change_tEnumerationUseat_status_change_tIndicates the current status of autonomous QTouch sensorValuesComment143
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ecal_threshold_tEnumeration<strong>User</strong>ecal_threshold_tA sensor recalibration threshold. This is expressed as a percentage of thesensor detection threshold.This is for automatic recovery from false conditions, such as a calibration whilesensors were touched, or a significant step change in power supply voltage.If the false condition persists the library will recalibrate according to the settingsof the recalibration threshold.This setting is applicable to all the configured sensors.Usage :RECAL_x = recalibration threshold is x percent of detection threshold value(rounded down).Note: a minimum value of 4 is used.Example: if detection threshold = 40, then:RECAL_100 = 40 ( 100 percent of 40)RECAL_50 = 20 ( 50 percent of 40)RECAL_25 = 10 ( 25 percent of 40)RECAL_12_5 = 5 ( 12.5 percent of 40)RECAL_6_25 = 4 ( 6.25 percent of 40 = 2, but value is limited to 4)ValuesRECAL_100RECAL_50RECAL_25RECAL_12_5RECAL_6_25resolution_tEnumerationUseComment100% recalibration threshold50% recalibration threshold25% recalibration threshold12.5% recalibration threshold6.25% recalibration thresholdresolution_tFor rotors and sliders, the resolution of the reported angle or position.RES_x_BIT = rotor/slider reports x-bit values.Example: if slider resolution is RES_7_BIT, then reported positions are in therange 0..127.ValuesCommentRES_1_BIT 1 bit resolution : reported positions range 0 – 1RES_2_BIT 2 bit resolution : reported positions range 0 – 3RES_3_BIT 3 bit resolution : reported positions range 0 – 7RES_4_BIT 4 bit resolution : reported positions range 0 – 15RES_5_BIT 5 bit resolution : reported positions range 0 – 31RES_6_BIT 6 bit resolution : reported positions range 0 – 63RES_7_BIT 7 bit resolution : reported positions range 0 – 127RES_8_BIT 8 bit resolution : reported positions range 0 – 255at_status_change_tEnumerationUseat_status_change_tIndicates the current status of autonomous <strong>QTouch</strong> sensorValuesComment143
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