Atmel QTouch Library User Guide

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Table 8 Compiler tool chains support for UC3L QTouch LibraryOverview of QTouch Library API for UC3LThe diagram below captures the high level arrangement of the QTouch Library for UC3L API.The QTouch Library for UC3L API can be used for Sensor configuration, Sensor Acquisitionparameter setting and Sensor Enable/Disable operations. Based on this input Sensorconfiguration, the QTouch Library takes care of the initialization, configuration and acquisitiondata capture operations using the CAT module. The UC3L CAT module interfaces with theexternal capacitive touch sensors and is capable of performing QTouch and QMatrix methodacquisition. For an Overview of QMatrix and QTouch Capacitive Touch acquisition, refer Section5.2.The raw acquisition data from the CAT module is processed by the QTouch Library. TheAdjacent Key Suppression (AKS), Detect Integration mechanism, Drift compensation andAutomatic Recalibration components of the Touch Library aid in providing a robust Touchperformance. Once the raw acquisition data is processed, the individual Sensor Status andWheel/Slider position information is provided to the user by means of a measurement completecallback operation.1168207K-AT42-09/11
Figure 35 Overview diagram of QTouch Library for UC3LAcquisition method support for UC3LWith the QTouch Library for UC3L, it is possible for a user to configure the following types ofSensors.• QMatrix method sensors.• QTouch Group A method sensors.• QTouch Group B method sensors.• Autonomous QTouch sensor.The QTouch Library for UC3L API has been arranged such that it is possible for the userapplication either to use any of the above method Standalone or two or more methods combinedtogether. The Table below captures the different API available under each method. For normaloperation, it is only required to use the Regular API set for each method. By using only theRegular API set, it is possible to achieve reduced code memory usage when using the QTouchLibrary. The Helper API is provided for added flexibility to the user application.Acquisition method Regular API Helper APIQMatrix method APItouch_qm_sensors_inittouch_qm_sensor_configtouch_qm_sensors_calibratetouch_qm_sensors_start_acquisitiontouch_event_dispatchertouch_qm_sensor_update_configtouch_qm_sensor_get_configtouch_qm_channel_update_burstlentouch_qm_update_global_paramtouch_qm_get_global_paramtouch_qm_get_libinfotouch_qm_sensor_get_deltatouch_deinitQTouch Group A/Bmethod API(The first parameter to theQTouch API, allows todistinguish between QTouchGroup A and QTouch GroupB.)touch_qt_sensors_inittouch_qt_sensor_configtouch_qt_sensors_calibratetouch_qt_sensors_start_acquisitiontouch_event_dispatchertouch_qt_sensor_update_configtouch_qt_sensor_get_configtouch_qt_update_global_paramtouch_qt_get_global_paramtouch_qt_get_libinfotouch_qt_sensor_get_deltatouch_qt _sensor_disabletouch_qt _sensor_reenabletouch_deinitAutonomous QTouch APItouch_at_sensor_inittouch_at_sensor_enabletouch_at_sensor_disabletouch_at_sensor_update_configtouch_at_sensor_get_configtouch_at_get_libinfotouch_deinitAPI State machine for UC3LTable 9 Acquisition method specific APIThe QTouch Library State machine diagram captures the different library States, Events that areallowed in each State and Event transition from one State to the other. The QTouch Library117
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Atmel QTouch LibraryUser GuideSuppo
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5.6.11.6.1 Debug Support in the sam
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6.3.16.21 touch_info_t ............
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• ARM: refers to a device in the
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Libraries for AVR microcontrollers
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QMatrix charge transfer is labeled
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Maximum ON DurationIf an object uni
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Setting Variable name Data Type Uni
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Guard ChannelGuard channel in Qtouc
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7 AKS groups are supported by the l
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Data structuresThis section lists t
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The signal gain for each sensor is
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• This function can be called any
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unit16_t qt_measure_sensors( uint16
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Channel NumberingChannel numbering
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qt_reset_sensing()qt_enable_xxx()qt
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Port AAll SNSK pinsterminatedon thi
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Example:Pins A0 ,A3 and A5 of PORT
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Channel 47 N/A N/A N/A N/A N/A X7Y5
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channel 0channel 1channel 2channel
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Disabling and Enabling of Pull-up f
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‣ Recommended threshold should be
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QMatrix acquisitionmethod libraries
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definition is not required.QT_NUM_C
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SNS1 and SNSK1 pins usethe same por
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• It is recommended to disable PU
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Table 4 :List of configurable param
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Number ofchannels requiredfor the a
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2. The above definitions should be
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NUM_Y_LINES_ROTOR_SLIDER_QT_MAX_NUM
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Page 74 and 75: Selecting the right configurationTh
Page 76 and 77: Figure 5-20 : Specifying QMatrix ac
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Page 88 and 89: X0,X1,X2,X3 are on PB0,PB1,PB2,PB3N
Page 90 and 91: 1. The channel numbers are allocate
Page 92 and 93: SNSK_array[1][1]=0x00; (SNSK odd ma
Page 94 and 95: SNSK_array[1][0]=0x14; (SNSK even m
Page 96 and 97: Figure 5-28: New Design Sensors in
Page 98 and 99: Figure 5-31: Selecting the MCU for
Page 100 and 101: Figure 5-34: Selecting the SNS and
Page 102 and 103: 2. QTOUCH_STUDIO_MASKS needs to be
Page 104 and 105: Figure 5-38: Selecting New Design3.
Page 106 and 107: Figure 5-42: Start window of the co
Page 108 and 109: Figure 5-45: Selecting the X,YA,YB,
Page 110 and 111: The code can be copied using the
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Page 114 and 115: Device Specific LibrariesIntroducti
Page 118 and 119: maintains the States of QMatrix, QT
Page 120 and 121: equired as shown in the case A of F
Page 122 and 123: Figure 37 QMatrix method schematicQ
Page 124 and 125: Figure 39 QMatrix API Flow diagram
Page 126 and 127: CAT Module Pin NameCSA0CSB0CSA1CSB1
Page 128 and 129: The QTouch method acquisition using
Page 130 and 131: Host Application codeUsing the init
Page 132 and 133: Frozen Stop Stop Run Run Run Run On
Page 134 and 135: Figure 45 Raw acquisition mode API
Page 136 and 137: Figure 46 GNU Example project usage
Page 138 and 139: the QTouch Library as QMatrix data
Page 140 and 141: TOUCH_STATUS_CHANGE 0x0002u Status
Page 142 and 143: sensor_type_tEnumerationUsesensor_t
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Page 148 and 149: touch_at_statusstructureInput / Out
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Page 152 and 153: variable to the Touch library. The
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• This API updates the configurat
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Rule Rule Description Advisory/Requ
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VCCPA0No ConnectionPA1PA2ATtiny20PA
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QTouch Library configuration parame
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Recommended setting.Table 19 QTouch
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Figure 51 Schematic overview of QTo
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QTouch Library configuration parame
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Devices supportedThe list of differ
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• The channel number is derived f
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MISRA Compliance ReportThis section
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May 2010Ver 4.2July 2010Ver 4.3Jan
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Atmel QTouch Library User Guide

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