Atmel QTouch Library User Guide

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unit16_t qt_measure_sensors( uint16_t current_time_ms )Arguments Type Commentcurrent_time_ms uint16 The current time in millisecondsReturnValueuint16_tCommentReturns the status of the <strong>Library</strong> as a combination of the following bit fields.Return valueBit CommentsdefinitionQTLIB_NO_ACTIVITY 0x0000 No activity detected on any of thesensorsQTLIB_IN_DETECT 0x0001 At least one sensor is in detectQTLIB_STATUS_CHANGE 0x0002 At least one sensor has changedON/OFF state since the last call toqt_measure_sensor()QTLIB_ROTOR_SLIDER_POS_CHANGE 0x0004 At least one rotor/slider has changedposition since the last call toqt_measure_sensors()QTLIB_CHANNEL_REF_CHANGE 0x0008 At least one reference value haschanged since last call toqt_measure_sensors()QTLIB_BURST_AGAIN 0x0100 Flag to indicate Multiple measurementsneeded.QTLIB_RESOLVE_CAL 0x0200 Multiple measurements needed toresolve calibration. Callqt_measure_sensors( ) once again.QTLIB_RESOLVE_FILTERIN 0x0400 Multiple measurements needed toresolve filtering. Callqt_measure_sensors( ) once again.QTLIB_RESOLVE_DI 0x0800 Multiple measurements needed toresolve detect integration. Callqt_measure_sensors( ) once again.QTLIB_RESOLVE_POS_RECAL 0x1000 Multiple measurements needed toresolve positive recalibration. Callqt_measure_sensors( ) once again.NOTE:• All sensors must be configured (using qt_enable_key or qt_enable_rotor orqt_enable_slider) and initialized by calling qt_init_sensing before calling this function.qt_calibrate_sensingThis function forces a recalibration of all enabled sensors.void qt_calibrate_sensing( void )Arguments Type CommentVoid - -NOTE:• Recalibration may be useful if, for example, it is desired to globally recalibrate all sensorson a change in application operating mode.• This function must be called only when the sensors have been configured and initialized.328207K-AT42-09/11
qt_reset_sensingThis function disables all sensors and resets all configuration settings (for example, “qt_di”) totheir default values.void qt_reset_sensing( void )Arguments Type CommentVoid - -NOTE:• This may be useful if it is desired to dynamically reconfigure sensing. After calling thisfunction, any required sensors must be re-enabled, filter callback needs to be reinitialized,and “qt_init_sensing()” must be called before “qt_measure_sensors()” is calledagain.• In case of QMatrix, the burst lengths for all channels are set to zero.qt_get_sensor_deltaThis function returns the delta value for a given channel.int16_t qt_get_sensor_delta( uint8_t sensor_number )Arguments Type Commentsensor_number unit8_t sensor id for which the delta is requiredReturn typeint16_tCommentThe delta value of the sensor specifiedNOTE:• All sensors must be configured (using qt_enable_key or qt_enable_rotor orqt_enable_slider) and initialized by calling qt_init_sensing before calling this function.qt_get_library_sigThis function is used to retrieve the library version and signature from the library.void qt_get_library_sig( qt_lib_siginfo_t *lib_sig_ptr )Arguments Type Commentlib_sig_ptr qt_lib_siginfo_t * Pointer to the structure which needs to beupdated with the library signatureinformationNOTE:• The function qt_measure_sensors() should have been called at least once prior to callingthis function.Sequence of Operations and Using the APIFigure 6 illustrates the sequence of operations required to be performed to add touch to an endapplication. By using the simple API’s as illustrated in the sequence flowchart, the user can addtouch sensing in his design.33
Page 1: Atmel QTouch LibraryUser GuideSuppo
Page 4: 5.6.11.6.1 Debug Support in the sam
Page 7 and 8: 6.3.16.21 touch_info_t ............
Page 12 and 13: • ARM: refers to a device in the
Page 14 and 15: Libraries for AVR microcontrollers
Page 16 and 17: QMatrix charge transfer is labeled
Page 18 and 19: Maximum ON DurationIf an object uni
Page 20 and 21: Setting Variable name Data Type Uni
Page 22 and 23: Guard ChannelGuard channel in Qtouc
Page 24 and 25: 7 AKS groups are supported by the l
Page 26 and 27: Data structuresThis section lists t
Page 28 and 29: The signal gain for each sensor is
Page 30 and 31: • This function can be called any
Page 34 and 35: Channel NumberingChannel numbering
Page 36 and 37: qt_reset_sensing()qt_enable_xxx()qt
Page 38 and 39: Port AAll SNSK pinsterminatedon thi
Page 40 and 41: Example:Pins A0 ,A3 and A5 of PORT
Page 42 and 43: Channel 47 N/A N/A N/A N/A N/A X7Y5
Page 44 and 45: channel 0channel 1channel 2channel
Page 46 and 47: Disabling and Enabling of Pull-up f
Page 48 and 49: ‣ Recommended threshold should be
Page 50 and 51: QMatrix acquisitionmethod libraries
Page 52 and 53: definition is not required.QT_NUM_C
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Page 58 and 59: Table 4 :List of configurable param
Page 60 and 61: Number ofchannels requiredfor the a
Page 62 and 63: 2. The above definitions should be
Page 64 and 65: NUM_Y_LINES_ROTOR_SLIDER_QT_MAX_NUM
Page 66 and 67: has Four Comparators (AC0A , AC1A ,
Page 68 and 69: Note: When using the IAR IDE / comp
Page 70 and 71: Figure 5-11: Selecting the right co
Page 72 and 73: SNS1 - SNSK1 & SNS2 -SNSK2QT_NUM_CH
Page 74 and 75: Selecting the right configurationTh
Page 76 and 77: Figure 5-20 : Specifying QMatrix ac
Page 78 and 79: Debug Support in Example applicatio
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Maximum number of rotor / sliders s
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Tips on pin assignments for the sen
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ATtiny88)v1g1s2(ATtiny461,ATmega16a
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X0,X1,X2,X3 are on PB0,PB1,PB2,PB3N
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1. The channel numbers are allocate
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SNSK_array[1][1]=0x00; (SNSK odd ma
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SNSK_array[1][0]=0x14; (SNSK even m
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Figure 5-28: New Design Sensors in
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Figure 5-31: Selecting the MCU for
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Figure 5-34: Selecting the SNS and
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2. QTOUCH_STUDIO_MASKS needs to be
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Figure 5-38: Selecting New Design3.
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Figure 5-42: Start window of the co
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Figure 5-45: Selecting the X,YA,YB,
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The code can be copied using the
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ApplicablereleaseQTouch libraries v
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Device Specific LibrariesIntroducti
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Table 8 Compiler tool chains suppor
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maintains the States of QMatrix, QT
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equired as shown in the case A of F
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Figure 37 QMatrix method schematicQ
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Figure 39 QMatrix API Flow diagram
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CAT Module Pin NameCSA0CSB0CSA1CSB1
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The QTouch method acquisition using
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Host Application codeUsing the init
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Frozen Stop Stop Run Run Run Run On
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Figure 45 Raw acquisition mode API
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Figure 46 GNU Example project usage
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the QTouch Library as QMatrix data
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TOUCH_STATUS_CHANGE 0x0002u Status
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sensor_type_tEnumerationUsesensor_t
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OUT_OF_TOUCHIN_TOUCHCurrently the a
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num_channel_signals uint8_t Length
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touch_at_statusstructureInput / Out
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UseData structure which holds the R
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variable to the Touch library. The
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structure.p_qta_config touch_qt_con
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p_touch_sensor_param touch_qm_param
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current_time_ms touch_time_t Curren
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touch_ret_t touch_qt_sensor_config(
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touch_qt_sensors_calibratetouch_ret
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touch_qt_get_libinfotouch_ret_t tou
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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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