Atmel QTouch Library User Guide

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Number ofchannels requiredfor the application6 number channels available for aTiny88 is listed inLibrary_Selection_Guide.xlsNumber of X linesneededBased on the number of channels,since 8 channels is needed, 4 X linesare supported.NUM_X_LINES is 4Since 3 X- lines (6 channels ) areused, Do not initialize 4 th elementin x_line_info[NUM_X_LINES].Hence channel6, channel7 neednot be used.Number of Y lines Based on the number of channels, NUM_Y_LINES is 2.neededsince 8 channels is needed, 2 Y linesare supportedRotors and sliders YesLibrary variants supported forrequired and 2ATTiny88 is listed in theNumber ofLibrary_Selection_Guide.xlsROTOR/SLIDERSX_LINES on pinsas below(4-X lines)FILL_OUT_X_LINE_INFO(1,0),FILL_OUT_X_LINE_INFO(2,2),Main file has to be edited basedon the configuration. Refer toX0- B0, X1- D2,X3 FILL_OUT_X_LINE_INFO(1,7), section 5.8.2.1 . Refer channel– B7, X4 – B5numbering from thesection5.6.6.1.2OrThis can be filled from the outputof the pin configurator tool inQTouch Studio. Please refer tosection 5.8.2Y_LINES on pins FILL_OUT_YA_LINE_INFO(0), Main file has to be edited basedas below (2 Y- FILL_OUT_YA_LINE_INFO(5), on the configuration. Refer toLines)Y0A- D0, Y0B- C1,Y1A-D5, Y1B-C4,FILL_OUT_YB_LINE_INFO(1),FILL_OUT_YB_LINE_INFO(4),section 5.8.2.1OrThis can be filled from the outputof the pin configurator tool inQTouch Studio. Please refer tosection 5.8.2NUM_X_PORTS 2 Since X lines are spread on amultiple(2) ports: PORTB, PORTDCompiler tool chain IAR Supported compiler tool chains608207K-AT42-09/11
Choice of portsavailable for thedesignPORT_X_1 = BPORT_X_2 = DYA Line on PORTDYB Line on PORTCSMP Pin on PORTD pin 7QT_DELAY_CYCLES of 4listed in 5.7.2.2Any pins that are not conflictingwith the host application andfollow the configuration supportedby library can be used.OrThis can be filled from the outputof the pin configurator tool inQTouch Studio. Please refer tosection 5.8.2Given the above requirements for the applications, the first step is to select the right libraryvariant required.Step 1:Select the Device that suits the requirements based on the touch sensing channels needed fromthe library selection guide available at C:\ Program Files\Atmel\ Atmel_QTouch_Libaries_4.x\Library_Selection_Guide.xlsStep 2:From the Library_selection_Guide.xls list,, we see that there are a few variants of librariessupported for AT Tiny device. Since the application requires 6 channels and rotor slider support,one has to select a library variant which supports at least 6 channels or more. Hence we selectthe 8 channel library which supports the required Port combination and the delay cycle preferredwhich works out to be the variant• libv1g1s1_8qm_4x_2y_krs_2rs.r90Step 3:Defining the constants / symbols in the project space or modifying in touch_qm_config.hIn the host application file (say main.c), define the following constants and symbols#define _QMATRIX_#define QT_NUM_CHANNELS 8#define NUM_X_LINES 4#define NUM_Y_LINES 2#define NUM_X_PORTS 2#define PORT_X_1B#define PORT_NUM_1 1#define PORT_X_2D#define PORT_NUM_2 2#define PORT_YAD#define PORT_YBC#define PORT_SMPD#define SMP_PIN 7#define QT_DELAY_CYCLES 4#define ROTOR_SLIDER_#define QT_MAX_NUM_ROTORS_SLIDERS 2Note:1. Some of these macro’s can be taken from the output of the Pin configurator tool fromQTouch Studio. Refer to section 5.8.261
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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 ............
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 32 and 33: unit16_t qt_measure_sensors( uint16
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
Page 54 and 55: SNS1 and SNSK1 pins usethe same por
Page 56 and 57: • It is recommended to disable PU
Page 58 and 59: Table 4 :List of configurable param
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
Page 80 and 81: Support for different compiler tool
Page 82 and 83: Maximum number of rotor / sliders s
Page 84 and 85: Tips on pin assignments for the sen
Page 86 and 87: ATtiny88)v1g1s2(ATtiny461,ATmega16a
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,
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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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