Library Description

This library provides basic functionality for reading the current value and controlling the click board.

Key functions:

• float hallcurrent5_getCurrent(uint16_t adcValue) - Reads current in mA.
• float hallcurrent5_getADCVoltage(uint16_t adcValue) - Reads voltage on the AN-pin.
• void hallcurrent5_setADCResolution(float adcRes) - Set ADC resolution (10bit or 12bit).

Examples description

The application is composed of the three sections :

• System Initialization - Sets AN pin and INT pin as INPUT.
• Application Initialization - Initialization driver init and ADC Init.
• Application Task - Reads current value in mA and this data logs to USBUART every 500ms.

void applicationTask()
{
    int16_t ADC_value;
    uint32_t sumADC = 0;
    uint8_t cnt;
    float current;
    char demoText[ 50 ];

    sumADC = 0;
    for(cnt = 0; cnt < 20; cnt++)
    {
        sumADC += hallcurrent5_adcRead();
    }
    ADC_value = (sumADC / 20);

    current = hallcurrent5_getCurrent(ADC_value/1.8);

    if (current < 0) current = 0;
    WordToStr(ADC_value, demoText);
    mikrobus_logWrite(" ADC value: ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_LINE);

    FloatToStr(current, demoText);
    mikrobus_logWrite(" Current : ", _LOG_TEXT);
    mikrobus_logWrite(demoText, _LOG_LINE);

    mikrobus_logWrite("  ", _LOG_LINE);
    Delay_ms( 500 );
}

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 click, USB 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.