Atmel QTouch Library User Guide

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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
• This API initializes the touch library Autonomous touch sensor. This API has to be calledbefore calling any other Autonomous touch API function.• Based on the input parameters, the CAT module is initialized with Autonomous SensorPin and Register configuration.• The General configuration data provided by the p_general_config pointer is common toboth QMatrix, QTouch Group A, QTouch Group B and Autonomous Touch sensors.touch_at_sensor_enabletouch_ret_t touch_at_sensor_enable( void)Arguments Type Commentvoid(*touch_at_status_change_interrupt_callback) (touch_at_status*p_at_status)void(*touch_at_status_change_interrupt_callback) (touch_at_status*p_at_status)AutonomousQTouch Callbackfunction.• This API enables the autonomous touch sensor and initiates continuous Touchmeasurement on the Autonomous QTouch sensor.• When there is a change in the autonomous QTouch sensor status, the callback functionas specified in touch_at_status_change_interrupt_callback will be called. The callbackfunction lets the user know whether the autonomous QTouch sensor is currently in touchor out of touch.Note that this callback function will be called from an interrupt service routine. Hence it isrecommended to have as minimal code as possible in the callback function.• This API should be called only after touch_at_sensor_init API is called.touch_at_sensor_disabletouch_ret_t touch_at_sensor_disable( void)Arguments Type Commentvoid -• This API disables the Touch measurement on the Autonomous QTouch sensor. Thestatus change callback function is not called when the Sensor is disabled.touch_at_sensor_update_configtouch_ret_t touch_at_sensor_update_config( touch_at_param_t *p_at_param )Arguments Type Commentp_at_param touch_at_param_t* Pointer to autonomous QTouch sensor configurationstructure.165
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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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has Four Comparators (AC0A , AC1A ,
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Note: When using the IAR IDE / comp
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Figure 5-11: Selecting the right co
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SNS1 - SNSK1 & SNS2 -SNSK2QT_NUM_CH
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Selecting the right configurationTh
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Figure 5-20 : Specifying QMatrix ac
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Debug Support in Example applicatio
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Support for different compiler tool
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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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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
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Page 134 and 135: Figure 45 Raw acquisition mode API
Page 136 and 137: Figure 46 GNU Example project usage
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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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Page 172 and 173: QTouch Library configuration parame
Page 174 and 175: Recommended setting.Table 19 QTouch
Page 176 and 177: Figure 51 Schematic overview of QTo
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Page 180 and 181: Devices supportedThe list of differ
Page 182 and 183: • The channel number is derived f
Page 184 and 185: MISRA Compliance ReportThis section
Page 186 and 187: May 2010Ver 4.2July 2010Ver 4.3Jan
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Atmel QTouch Library User Guide

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