light2

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Light 2 Click

Light 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 Ilic
• Date : Nov 2023.
• Type : I2C type

Software Support

Example Description

This example demonstrates the use of Light 2 Click board by measuring the ambient light level in Lux.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.Light2

Example Key Functions

• light2_cfg_setup Config Object Initialization function.

void light2_cfg_setup ( light2_cfg_t *cfg );

• light2_init Initialization function.

err_t light2_init ( light2_t *ctx, light2_cfg_t *cfg );

• light2_default_cfg Click Default Configuration function.

err_t light2_default_cfg ( light2_t *ctx );

• light2_read_raw_data This function reads raw data from the ADC of Light 2 Click board.

err_t light2_read_raw_data ( light2_t *ctx, uint16_t *data_out );

• light2_get_cal_const This function is used to get a calculation constant depending on Light 2 Click board configuration.

err_t light2_get_cal_const ( light2_t *ctx );

• light2_get_light_data This function is used to read light data of Light 2 Click board configuration.

err_t light2_get_light_data ( light2_t *ctx, float *light_data );

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    light2_cfg_t light2_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 );
    log_info( &logger, " Application Init " );

    // Click initialization.
    light2_cfg_setup( &light2_cfg );
    LIGHT2_MAP_MIKROBUS( light2_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == light2_init( &light2, &light2_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( LIGHT2_ERROR == light2_default_cfg ( &light2 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Reads the ADC voltage and then calculates the illuminance from it. The calculated value of illuminance in lux is being displayed on the USB UART approximately once per second.

void application_task ( void ) 
{
    float lux_data = 0;

    light2_get_light_data( &light2, &lux_data );
    log_printf( &logger, " LUX data: %.2f LUX \r\n", lux_data );

    Delay_ms ( 1000 );
}

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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