multimeter

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Multimeter Click

Multimeter Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : MikroE Team
• Date : Jan 2020.
• Type : SPI type

Software Support

Example Description

This example showcases how to configure, initialize and use the Multimeter Click. The Click measures resistance in Ohms, voltage in mVs, current in mAs and capacitance in nFs using a dual CMOS and quad CMOS op-amps, an ADC and other on board modules.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Multimeter

Example Key Functions

• multimeter_cfg_setup Config Object Initialization function.

void multimeter_cfg_setup ( multimeter_cfg_t *cfg );

• multimeter_init Initialization function.

err_t multimeter_init ( multimeter_t *ctx, multimeter_cfg_t *cfg );

• multimeter_default_cfg Click Default Configuration function.

void multimeter_default_cfg ( multimeter_t *ctx );

• multimeter_read_resistance This function reads and returns resistance data.

float multimeter_read_resistance ( multimeter_t *ctx );

• multimeter_read_voltage This function reads and returns voltage data.

float multimeter_read_voltage ( multimeter_t *ctx );

• multimeter_read_current This function reads and returns current data.

float multimeter_read_current ( multimeter_t *ctx );

Application Init

This function initializes and configures the logger and Click modules. Additional calibration of the measurement components is done in the default_cfg(...) function.

void application_init ( )
{
    log_cfg_t log_cfg;
    multimeter_cfg_t cfg;

    /** 
     * Logger initialization.
     * Default baud rate: 115200
     * Default log level: LOG_LEVEL_DEBUG
     * @note If USB_UART_RX and USB_UART_TX 
     * are defined as HAL_PIN_NC, you will 
     * need to define them manually for log to work. 
     * See @b LOG_MAP_USB_UART macro definition for detailed explanation.
     */
    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, "---- Application Init ----" );

    //  Click initialization.

    multimeter_cfg_setup( &cfg );
    MULTIMETER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    multimeter_init( &multimeter, &cfg );
    multimeter_default_cfg( &multimeter );
}

Application Task

This function measures and displays resistance, voltage, current and capacitance data. It does so every second.

void application_task ( )
{
    float resistance;
    float voltage;
    float current;
    float capacitance;

    resistance = multimeter_read_resistance( &multimeter );
    log_printf( &logger, " * Resistance: %.3f Ohms * \r\n", resistance );

    voltage = multimeter_read_voltage( &multimeter );
    log_printf( &logger, " * Voltage: %.3f mV * \r\n", voltage );

    current = multimeter_read_current( &multimeter );
    log_printf( &logger, " * Current: %.3f mA * \r\n", current );

    capacitance = multimeter_read_capacitance( &multimeter );
    log_printf( &logger, " * Capacitance: %.3f nF * \r\n", capacitance );

    log_printf( &logger, "------------------------\r\n" );
    Delay_1sec( );
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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