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mikroSDK Library

Analog Key click

Rating:

5

Author: MIKROE

Last Updated: 2019-02-21

Package Version: 1.0.0.0

mikroSDK Library: 1.0.0.0

Category: Measurements

Downloaded: 4061 times

Not followed.

License: MIT license  

Analog Key Click is an analog keyboard on a Click board. It contains six tactile pushbuttons, used to select one of six different voltage levels.

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  • mikroSDK Library 2.0.0.0
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mikroSDK Library Blog

Analog Key click

Analog Key click

Native view of the Analog Key click board.

View full image
Analog Key click

Analog Key click

Front and back view of the Analog Key click board.

View full image

Library Description

The library contains a function which, based on the ADC value, detects which button is pressed.

Key functions:

  • uint8_t analogkey_getKey(uint16_t adcValue) - Detects which button is pressed.

Examples description

The application is composed of the three sections :

  • System Initialization - LOG initialization for displaying data on USB UART.
  • Application Initialization - Initializes ADC init.
  • Application Task - (code snippet) - Reads ADC value and detects which button is pressed based on that value.
void applicationTask()
{
    uint16_t ADC_value;
    uint8_t isKey;
    char demoText[ 50 ];
    uint8_t cnt;
    uint16_t sumValue = 0;
    
    for(cnt = 0; cnt < 5; cnt++)
    {
        ADC_value = analogkey_adcRead();
        sumValue += ADC_value;
        Delay_10ms();
    }
    ADC_value = sumValue / 5;
    isKey = analogkey_getKey(ADC_value);
    
    if(isKey != _ANALOGKEY_NO_TOUCH)
    {
        IntToStr(isKey, demoText);
        mikrobus_logWrite("Pressed the button : ", _LOG_TEXT);
        mikrobus_logWrite(demoText, _LOG_LINE);
    }
    Delay_ms( 300 );
}

Other mikroE Libraries used in the example:

  • ADC
  • UART

Additional notes and informations

Depending on the development board you are using, you may need USB UART clickUSB UART 2 clickor 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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