ATAVRTS2080A Atmel, ATAVRTS2080A Datasheet - Page 42

• Manufacturer Part Number: ATAVRTS2080A
• Description: KIT QTOUCH W/SW ATMEGA88
• Manufacturer: Atmel
• Series: QTouch™r

Specifications of ATAVRTS2080A

• Sensor Type: Touch, Capacitive
• Sensing Range: 1 Rotor, 1 Slider, and 2 Buttons/Keys
• Interface: Application Programming Interface (API)
• Voltage - Supply: 1.8 V ~ 5.5 V
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATmega88
• Tool Type: Development Kit
• Cpu Core: AVR 8 / 32
• Data Bus Width: 8 bit
• Core Architecture: AVR
• Silicon Manufacturer: Atmel
• Silicon Core Number: ATmega88, ATmega88A
• Silicon Family Name: AVR
• Kit Contents: Board, CD
• Development Tool Type: Hardware / Software - Eval/Demo Board
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Sensitivity: -
• Lead Free Status / Rohs Status: Details

2. Add a filter function prototype to the main module:
The signal values processed by the ATMEL QTouch Library are now the mean of the last four
actual signal values.
5.6.6.4
The GPIO pins within a port that are not used for QTouch or QMatrix acquisition methods can be
used for user application. The usage of pins for QTouch is based on the channels that are being
configured while enabling the sensors (keys/rotors/sliders).
The example below configuring 4 keys, a rotor and a slider shows how the pin configurability is
achieved by configuring the sensor channels. The code snippet configures a specific 10 channels
of a 16 channel library based on the GPIO port pins available for QTouch™.
Port Configuration:
Channel/Pin Configuration:
42
3. When configuring the ATMEL QTouch library, set the callback function pointer:
4. Add the filter function:
#define SNSK1
#define SNS1
#define SNSK2
#define SNS2
/* enable a key on channel 0
qt_enable_key( CHANNEL_0, AKS_GROUP_2, 10u, HYST_6_25 );
/* filter for channel signals */
static uint16_t filter[QT_NUM_CHANNELS][4];
/* example signal filtering function */
static void filter_data_mean_4( void );
/* set callback function */
qt_filter_callback = filter_data_mean_4;
void filter_data_mean_4( void )
{
uint8_t i;
/*
* Shift previously stored channel signal data.
* Store new channel signal data.
* Set library channel signal data = mean of last 4 values.
*/
for( i = 0u; i < QT_NUM_CHANNELS; i++ )
}
Allocating unused Port Pins for User Application
{
filter[i][0] = filter[i][1];
filter[i][1] = filter[i][2];
filter[i][2] = filter[i][3];
filter[i][3] = qt_measure_data.channel_signals[i];
qt_measure_data.channel_signals[i] = ( (
filter[i][1] +
filter[i][2] +
filter[i][3] ) / 4u );
}
C
D
A
B
*/
filter[i][0] +
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