ATAVRQTOUCHX Atmel, ATAVRQTOUCHX Datasheet - Page 162

• Manufacturer Part Number: ATAVRQTOUCHX
• Description: BOARD EVAL CAPACITIVE TOUCH
• Manufacturer: Atmel
• Series: QTouch™r

Specifications of ATAVRQTOUCHX

• Sensor Type: Touch, Capacitive
• Sensing Range: 1 Slider, 1 Wheel, 2 Buttons
• Interface: USB
• Voltage - Supply: 5V, USB
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: AT90USB1287, ATxmega128A1
• Silicon Manufacturer: Atmel
• Silicon Family Name: ATxmega
• Kit Contents: Board
• Svhc: No SVHC (15-Dec-2010)
• Core Architecture: AVR
• Core Sub-architecture: AVR19
• Kit Features: One Slider, One Wheel And 2
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

6.4.5
The Table below describes the various configuration parameters corresponding to the ATtiny20.
162
Setup the desired device clock using the init_system() in main.c
Using the init_timer(), setup the Timer ISR such that the Timer Interrupt occurs every
20ms . Enable the ADC and configure in Free running mode.
Using the touch_config_tiny20.h configuration file,
1. Set the desired number of Sensors.
2. Set the Individual sensor Threshold, Hysteresis, Recalibration Threshold and Delay
cycle values.
3. Set the desired Sensor Global acquisition parameters using the
IAR Project->Linker options.
4. The DEF_QT_ADC_CHANNEL_START_INDEX Linker option can be used to set
the starting ADC Channel.
Add any Host Application
(a Sample LED application is available with the Tin20 EK IAR Example project).
QTouch Library configuration parameters for ATtiny20
Call in loop
Figure 50 QTouch method for Tiny20 API Flow diagram
time_to_
measure_touch
qt_measure_sensors()
Host Application code
qt_init_sensing()
Measured data and Touch Status
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