Atmel QTouch Library User Guide

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Devices supportedThe list of different devices that are supported by the QTouch library for 2K devices is givenbelow:1. ATtiny2313A2. ATtiny261A3. ATtiny24A4. ATtiny25AComplete information is available in Library_Selection_Guide.xls.Salient Features of QTouch Library for 2K Devices• 1 to 4 Touch Buttons can be configured. Supports maximum of 4 Buttons.• Libraries in variants of 1, 2 and 4 channels are provided.• 2K device libraries are supported only for IAR.• Library API’s are same as Generic QTouch libraries.• Support for more than one pair of SNS and SNSK ports are not available for 2K tinydevices.NOTE:No AKS, no Power Optimization and no pin configurability support in case of 2K devicelibraries.The change information like library status flags which reflects if there is any change inReference values, rotor slider position change status flags etc are not part of the 2K devicelibraries except burst again flag.Library VariantsFor Different library variants available for 2K Devices, please refer Library_Selection_Guide.xlsQTouch API for 2K Devices and UsageThis section describes the different API’s used during touch sensing. Using the API, Touchsensors and the associated channels can be defined. Once touch sensing has been initiated bythe user, the host application can use the API to make touch measurements and determine thestatus of the sensors.Refer section 5.6.6 and Figure 5.6 for API usagetouch_api_2kdevice.h - public header fileThe touch_api_2kdevice.h header file is the public header file which needs to be included inuser’s application. The type definitions and function prototypes of the API’s listed in sections 5.6.3, 5.6.4 and 5.6.5The touch_api_2kdevice.h header file is located in the library distribution in the followingdirectory.• ..\Atmel_QTouch_Libraries_4.x\Generic_QTouch_Libraries\includeThe constant/symbol definitions can be placed in any of the following.1808207K-AT42-09/11
• Defined user’s project options. All the constants/symbols must be defined for both thecompiler and assembler preprocessing definitions.• As an alternative, it is also declared in the touch_qt_config_2kdevice.h file. The usermay modify these defined values based on the requirements.Global settings common to all sensors and sensor specific settings are listed in sections 5.3 and5.4 respectivelySequence of Operations and Using the APIFigure 5-6 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.Channel Numbering• 1-channel library – supports 1 channel using 1 consecutive pins on different SNS andSNSK ports (or) supports 1 channel using 2 consecutive pins on the same port used forboth SNS and SNSK lines. This library requires 1 or 2 port.• 2-channel library – supports up to 2 channels using 2 consecutive pins on different SNSand SNSK ports (or) supports up to 2 channels using 4 consecutive pins on the sameport used for both SNS and SNSK lines. This library requires 1 or 2 ports.• 4-channel library – supports up to 4 channels using 4 consecutive pins on different SNSand SNSK ports (or) supports up to 4 channels using 8 consecutive pins on the sameport used for both SNS and SNSK lines. This library requires 1 or 2 ports.Channel numbering when routing SNS and SNSK pins to different portsWhen SNS and SNSK pins are available on different ports, the channel numbering follows the pinnumbering in the ports selected.• The channel numbers follow the pin numbers starting with the LSB (pin 0 is channel 0and pin 3 is channel 3).• Since the channel numbers are fixed to the pins of the SNS and SNSK ports, if thedesign calls for use of a subset of the pins available in the SNS and SNSK ports, the userhas to skip the channel numbers of the unused SNS and SNSK pins.For example, on a 4 channel configuration using SNS and SNSK ports, if pin 2 is notused for touch sensing ( on both SNS and SNSK ports), channel number 2 isunavailable and care should be taken while configuring the channels and sensors toavoid using this channel. Also, the SNS and SNSK masks are assigned properly asexplained in section 7.5.2.2Channel numbering when routing SNS and SNSK pins to the same portWhen SNS and SNSK pins are connected to the same port, the even pin numbers will be used asSNS pins and the odd pins will be used as the SNSK pins.• The number of channels supported will be limited 4 channels• For e.g., for a 4 channel configuration where the SNS and SNSK pins are connected toPort B, the port pins 0&1 are used for channel 0.181
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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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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
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
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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 146 and 147: num_channel_signals uint8_t Length
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 160 and 161: touch_ret_t touch_qt_sensor_config(
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Page 166 and 167: • This API updates the configurat
Page 168 and 169: Rule Rule Description Advisory/Requ
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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
Page 178 and 179: QTouch Library configuration parame
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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