ldc2

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LDC 2 Click

LDC 2 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 : Stefan Filipovic
• Date : Jul 2021.
• Type : SPI type

Software Support

Example Description

This example demonstrates the use of LDC 2 Click board.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.LDC2

Example Key Functions

• ldc2_cfg_setup Config Object Initialization function.

void ldc2_cfg_setup ( ldc2_cfg_t *cfg );

• ldc2_init Initialization function.

err_t ldc2_init ( ldc2_t *ctx, ldc2_cfg_t *cfg );

• ldc2_default_cfg Click Default Configuration function.

err_t ldc2_default_cfg ( ldc2_t *ctx );

• ldc2_measure_resonance_impedance This function measures the resonance impedance and proximity data.

err_t ldc2_measure_resonance_impedance ( ldc2_t *ctx, uint8_t *prox_data, float *rp_data );

• ldc2_measure_inductance This function measures the inductance and sensor frequency.

err_t ldc2_measure_inductance ( ldc2_t *ctx, float *freq, float *inductance );

• ldc2_get_sensor_frequency This function reads and calculates the sensor frequency.

err_t ldc2_get_sensor_frequency ( ldc2_t *ctx, float *freq );

Application Init

Initializes the driver and configures the Click board.

void application_init ( void )
{
    log_cfg_t log_cfg;      /**< Logger config object. */
    ldc2_cfg_t ldc2_cfg;    /**< Click config object. */

    /** 
     * 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 );
    Delay_ms ( 100 );
    log_info( &logger, " Application Init " );

    // Click initialization.

    ldc2_cfg_setup( &ldc2_cfg );
    LDC2_MAP_MIKROBUS( ldc2_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == ldc2_init( &ldc2, &ldc2_cfg ) )
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    if ( LDC2_ERROR == ldc2_default_cfg ( &ldc2 ) )
    {
        log_error( &logger, " Default Config Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    log_info( &logger, " Application Task " );
}

Application Task

Measures the resonance impedance and proximity as well as the inductance and sensor frequency approximately every 200ms and displays all values on the USB UART.

void application_task ( void )
{
    uint8_t prox_data = 0;
    float rp_data = 0;
    float freq = 0;
    float inductance = 0;
    
    if ( LDC2_OK == ldc2_measure_resonance_impedance( &ldc2, &prox_data, &rp_data ) )
    {
        log_printf( &logger, " Proximity: %u\r\n Resonance Impedance: %.3f kOhm\r\n\n", ( uint16_t ) prox_data, rp_data );
    }
    
    if ( LDC2_OK == ldc2_measure_inductance( &ldc2, &freq, &inductance ) )
    {
        log_printf( &logger, " Sensor Frequency: %.3f MHz\r\n Inductance: %.6f uH\r\n\n", freq, inductance );
    }
    
    Delay_ms ( 200 );
}

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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