uvclight

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UVC Light Click

UVC Light 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 : Nikola Peric
• Date : Feb 2022.
• Type : PWM type

Software Support

Example Description

This Click has ultraviolet LEDs with 275nm wavelength. UVC radiation refers to wavelengths shorter than 280 nm. Because of the spectral sensitivity of DNA, only the UVC region demonstrates significant germicidal properties.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.UvcLight

Example Key Functions

• uvclight_cfg_setup Config Object Initialization function.

void uvclight_cfg_setup ( uvclight_cfg_t *cfg );

• uvclight_init Initialization function.

err_t uvclight_init ( uvclight_t *ctx, uvclight_cfg_t *cfg );

• uvclight_pwm_start This function starts PWM module.

void uvclight_pwm_start ( uvclight_t *ctx );

• uvclight_set_duty_cycle This function sets the PWM duty cycle.

void uvclight_set_duty_cycle ( uvclight_t *ctx, pwm_data_t duty_cycle );

• uvclight_pwm_stop This function stops PWM module.

void uvclight_pwm_stop ( uvclight_t *ctx );

Application Init

Initializes the driver.

void application_init ( void )
{
    log_cfg_t log_cfg;
    uvclight_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.

    uvclight_cfg_setup( &cfg );
    UVCLIGHT_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    uvclight_init( &uvclight, &cfg );

    uvclight_set_duty_cycle ( &uvclight, 0.0 );
    uvclight_pwm_start( &uvclight );
    Delay_ms ( 100 );
    log_info( &logger, "---- Application Task ----" );
}

Application Task

Increases and decreases the pwm duty cycle. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void )
{
    static int8_t duty_cnt = 1;
    static int8_t duty_inc = 1;
    float duty = duty_cnt / 10.0;

    uvclight_set_duty_cycle ( &uvclight, duty );
    log_printf( &logger, "Duty: %d%%\r\n", ( uint16_t )( duty_cnt * 10 ) );
    Delay_ms ( 500 );

    if ( 10 == duty_cnt ) 
    {
        duty_inc = -1;
    }
    else if ( 0 == duty_cnt ) 
    {
        log_printf( &logger, "Cooldown 2 SEC\r\n");
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        duty_inc = 1;
    }
    duty_cnt += duty_inc;
}

Note

CAUTION! High intensity UV Light - avoid eye and skin exposure. Avoid looking direclty at light!

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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