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mikroSDK Library

L meter click

Rating:

5

Author: MikroElektronika Team

Last Updated: 2019-04-10

Category: Measurements

Downloaded: 107 times

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License: MIT license  

L Meter Click is a compact and accurate Click board, capable of measuring and monitoring the inductance of the external component.

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mikroSDK Library Blog

L Meter click

L Meter click

Native view of the L Meter click board.

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L Meter click

L Meter click

Front and back view of the L Meter click board.

View full image

Library Description

Library contains all the necessary functions for successfully reading Frequency and Inductance on the indicator.

Key functions:

  • uint32_t lmeter_getFrequency() - Frequency reading function.
  • float lmeter_getCoilInductance() - Inductances reading function.
  • void lmeter_tick() - Timer Tick functions.

Examples description

The application is composed of the three sections :

  • System Initialization - Sets PWM pin as OUTPUT and INT pin as INPUT.
  • Application Initialization - Initialization driver init and Timer init.
  • Application Task - Reads the frequency and induction on the inductor in [uH] and this data logs to USBUART. - Waits for valid user input and executes functions based on set of valid commands.
  • Commands :
    'F' - For calculating and logging frequencies
    'L' - For calculating and logging inductances
    'T' - Enabling and disabling additional C2 capacitors
void applicationTask()
{
    uint8_t dataReady_;
    char receivedData_;

    dataReady_ = UART_Rdy_Ptr( );

    if (dataReady_ != 0)
    {
        receivedData_ = UART_Rd_Ptr( );

        switch (receivedData_)
        {
            case 'F' :
            {
                mikrobus_logWrite(" --- PLEASE WAIT FOR THE CALCULATION PROCESS TO COMPLETE ---", _LOG_LINE);
                lmeter_setTimer();
                _Frequency = lmeter_getFrequency();
                if (_Frequency < _LMETER_MIN_INDUCTANCE_RANGE)
                {
                    mikrobus_logWrite(" Frequency is out of range !!! ", _LOG_LINE);
                    mikrobus_logWrite("  ", _LOG_LINE);
                }
                else
                {
                    FloatToStr(_Frequency, demoText);
                    mikrobus_logWrite(" Frequency = ", _LOG_TEXT);
                    mikrobus_logWrite(demoText, _LOG_TEXT);
                    mikrobus_logWrite(" kHz ", _LOG_LINE);
                    mikrobus_logWrite("  ", _LOG_LINE);
                }
                break;
            }
            case 'L' :
            {
                mikrobus_logWrite(" --- PLEASE WAIT FOR THE CALCULATION PROCESS TO COMPLETE ---", _LOG_LINE);
                lmeter_setTimer();
                _Frequency = lmeter_getFrequency();
                
                if (_Frequency < _LMETER_MIN_INDUCTANCE_RANGE)
                {
                    mikrobus_logWrite(" Frequency is out of range !!! ", _LOG_LINE);
                    mikrobus_logWrite("  ", _LOG_LINE);
                }
                else
                {
                    _Inductance = lmeter_getCoilInductance(_Frequency);

                    FloatToStr(_Inductance, demoText);
                    mikrobus_logWrite(" Inductance = ", _LOG_TEXT);
                    mikrobus_logWrite(demoText, _LOG_TEXT);
                    mikrobus_logWrite(" uH ", _LOG_LINE);
                    mikrobus_logWrite("  ", _LOG_LINE);
                }
                break;
            }
            case 'T' :
            {
                if (T_SW == _LMETER_T_SW_ENABLE)
                {
                    T_SW = _LMETER_T_SW_DISABLE;
                    lmeter_setTSpin( _LMETER_T_SW_DISABLE );
                    mikrobus_logWrite(" ---  NEW SETTINGS - DISABLE [C2] CAPACITOR --- ", _LOG_LINE);
                    mikrobus_logWrite("* The sum of all the capacitors is 1000pF ", _LOG_LINE);
                    mikrobus_logWrite("* Disabled capacitor [C2]", _LOG_LINE);
                }
                else
                {
                    T_SW = _LMETER_T_SW_ENABLE;
                    lmeter_setTSpin( _LMETER_T_SW_ENABLE );
                    mikrobus_logWrite(" ---  NEW SETTINGS - ENABLE [C2] CAPACITOR --- ", _LOG_LINE);
                    mikrobus_logWrite("* The sum of all the capacitors is 500pF ", _LOG_LINE);
                    mikrobus_logWrite("* Active new capacitor [C2]", _LOG_LINE);
                }
                break;
            }
        }
    }
}

Other mikroE Libraries used in the example:

  • Conversions Library

Additional notes and informations

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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