Atmel QTouch Library User Guide

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MISRA Compliance ReportThis section lists the compliance and deviations for MISRA standards of coding practice for theQTouch acquisition method libraries for 2K devicesWhat is coveredThe QTouch acquisition method libraries for 2K devices adhere to the MISRA standards. Theadditional reference code provided in the form of sample applications is not guaranteed to beMISRA compliant.Target EnvironmentDevelopment EnvironmentMISRA Checking softwareMISRA Rule set appliedIAR Embedded WorkbenchThe MISRA C Compliance has been performed for the libraryusing MISRA C 2004 Rules in IAR Workbench developmentenvironment.MISRAC 2004 Rule SetDeviations from MISRA C StandardsQTouch acquisition method libraries for 2K devicesThe QTouch acquisition method libraries were subject to the above mentioned MISRAcompliance rules. The following exceptions have not been fixed as they are required for theimplementation of the library.Applicable QTouch librariesReleaseRule No Rule Description Exception noted / How it is addressed1.1 Rule states that all codeshall conform to ISO 9899standard C, with noextensions permitted.This Rule is not supported as the libraryimplementation requires IAR extensions like__interrupt. These intrinsic functions relate todevice hardware functionality, and cannot10.1 Rule states that implicitconversion from Underlyinglong to unsigned long10.6 This Rule says that a 'U'suffix shall be applied to allconstants of 'unsigned' type14.4 Rule states that go-tostatement should not beused.19.10Rule states that In thedefinition of a function-likemacro, each instance of aparameter shall be enclosedin parenthesispractically be avoided.The library uses macros to combine symboldefinitions to form a unique expanded symbolname and in this, the usage of unsigned qualifiersfor numeric constants (e.g. 98u) causes namemangling. This is the only occurrence of this errorin the library.The library uses macros to combine symboldefinitions to form a unique expanded symbolname and in this, the usage of unsigned qualifiersfor numeric constants (e.g. 98u) causes namemangling. This is the only occurrence of this errorin the library.The library uses conditional jump instructions toreduce the code footprint at a few locations andthis is localized to small snippets of code. Hencethis rule is not supported.There is one instance where the library breaks thisrule where two macro definitions are combined toform a different symbol name. Usage ofparenthesis cannot be used in this scenario.1848207K-AT42-09/11
19.12 Rule states that there shallbe at most one occurrenceof the # or ## preprocessoroperator in a single macrodefinitionThere is one instance in the library where this ruleis violated where the library concatenates twomacro definitions to arrive at a different definition.Revision HistoryThe table below lists the revision history for chapters in the user guide.QTouch Library User guide Revision HistoryDate/Version Chapter Change notesMay 2009 All2 nd release of QTouch library users guideVer2.0Sep 2009 AllRe-structured user guide with new and expanded sectionsVer. 3.0Nov 2009 6.3, 6.9, 6.10, • Updated API changesVer. 3.1 7, 10• Updated new libraries and device support information• Updated debug interface information supported by theQTouch libraries• Updated known issues tableDec 2009Ver. 3.2Feb 2010Ver 4.0Apr 2010Ver 4.16.10.4, 7.1.2,7.1.5, 7.1.6,10,7.2.4.2.2,7.2.4.3.7,7.2.4.3.2,7.2.4.3.5,7.2.4.3.7,All chapterschanged• Added section about configuring unused pins in userapplication• Added more information to some sections to clearambiguity• Updated Memory footprint information for IAR and GCCcompiled QTouch libraries.• Updated known issues table• Added the device support, port combinations, memoryrequirements• QMatrix IAR and GCC libraries to support ATmega325P,ATmega645, and ATtiny167.• Modified port combinations for the 165P for QMatrixlibraries.• Few Port combinations added in case of ATmega88libraries.• A separate library selection guide is provided external tothe user guide. All sections included in the library selectionguide have been removed from the user guide.• All sections have been updated to account for the improvedconfigurability of the libraries.• Added sections related to Positive Recalibration Delay,Position Hysteresis, and Position Resolution.• Device support extended for QMatrix for the release hasbeen added in section 5.7.2.4.1 and 5.7.2.3• In case of QMatrix, 4 ( 4x1) channel has been addedwherever needed and in case of ATxmega devices 56(8x7) channel has been added according to the changes• QTouch Library for UC3L API Device Specific Libraries185
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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
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Host Application codeUsing the init
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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 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
Page 154 and 155: structure.p_qta_config touch_qt_con
Page 156 and 157: p_touch_sensor_param touch_qm_param
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Page 162 and 163: touch_qt_sensors_calibratetouch_ret
Page 164 and 165: touch_qt_get_libinfotouch_ret_t tou
Page 166 and 167: • This API updates the configurat
Page 168 and 169: Rule Rule Description Advisory/Requ
Page 170 and 171: VCCPA0No ConnectionPA1PA2ATtiny20PA
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 180 and 181: Devices supportedThe list of differ
Page 182 and 183: • The channel number is derived f
Page 186 and 187: May 2010Ver 4.2July 2010Ver 4.3Jan
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Atmel QTouch Library User Guide

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