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mikroSDK Library

TouchKey 3 click

Rating:

5

Author: MIKROE

Last Updated: 2018-03-13

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Capacitive

Downloaded: 6024 times

Not followed.

License: MIT license  

TouchKey 3 click is equipped with advanced capacitive sensors, based on the proprietary QTouch technology, that can be used to sense touch on 7 different keys.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

TouchKey 3 click

TouchKey 3 click

Native view of the TouchKey 3 Click board.

View full image
TouchKey 3 click

TouchKey 3 click

Fron and back view of the TouchKey 3 Click board.

View full image

Library Description

The library contains functions that communicate with TouchKey 3 click via SPI interface. It covers all the modes of communication with the click that are available.

Key functions

uint8_t touchkey3_sendCommand(uint8_t command) - Sends a command to TouchKey 3 click

uint8_t touchkey3_sendRequest(uint8_t request, uint8_t * pResponse) - Retrieves a response to a request from TouchKey 3 click

uint8_t touchkey3_setData(uint8_t dataAddress, uint8_t writeData) - Writes data into configuration registers

Examples Description

The demo application is composed of three sections:

  • System Initialization - Initializes peripherals and pins.
  • Application Initialization - Initializes click driver and performs a soft reset of the click.
  • Application Task - (Code snippet) - Reads the status of the keys and outputs a message if a key is touched.
void applicationTask()
{
    uint8_t returnData[ 2 ];
    uint8_t counter;
    uint8_t temp;
    uint8_t text[ 20 ] = { 0 };

    touchkey3_sendRequest( _TOUCHKEY3_REQ_ALL_KEYS, &returnData );

    for (counter = 0; counter < 7; counter++)
    {
        if ((returnData[1] >> counter) & 0x01)
        {
            mikrobus_logWrite( "Touch detected on key ", _LOG_TEXT );
            //Converts the key index into ascii character ( 0 - 7 -> '1' - '7')
            temp = counter + 49;
            WordToStr( temp, text );
            mikrobus_logWrite( text, _LOG_TEXT );
            mikrobus_logWrite( ".", _LOG_LINE );
            Delay_ms( 1000 );
        }
    }
    Delay_ms( 200 );
}

Other MikroElektronika libraries used in the example:

  • UART

Additional notes and information

Depending on the development board you are using, you may need USB UART clickUSB UART 2 click or RS232 click to connect to your PC, for development systems with no UART to USB interface available on the board. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.

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