lightranger

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LightRanger Click

LightRanger 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 : Dec 2019.
• Type : I2C type

Software Support

Example Description

This example collects data from the sensor and logs it to the terminal.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.LightRanger

Example Key Functions

• lightranger_cfg_setup Config Object Initialization function.

void lightranger_cfg_setup ( lightranger_cfg_t *cfg );

• lightranger_init Initialization function.

err_t lightranger_init ( lightranger_t *ctx, lightranger_cfg_t *cfg );

• lightranger_write_byte This function writes a byte of data to given address.

void lightranger_write_byte ( lightranger_t* ctx, uint16_t reg_addr, uint8_t write_command );

• lightranger_get_ambiant_light This function reads register and calculates the light level in lux.

float lightranger_get_ambiant_light ( lightranger_t* ctx, uint16_t als_gain_check );

• lightranger_get_distance This function reads range result from register.

uint16_t lightranger_get_distance ( lightranger_t* ctx );

Application Init

Initialization driver for sensor Vl6180X and stars logging to terminal.

void application_init ( void )
{
    log_cfg_t log_cfg;
    lightranger_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.

    lightranger_cfg_setup( &cfg );
    LIGHTRANGER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    lightranger_init( &lightranger, &cfg );
    
    lightranger_default_cfg( &lightranger );
    Delay_ms ( 1000 );
}

Application Task

Measures and calculates ambient light intensity and distance from sensor, when the distance is changed log is updated, results are being sent to the Usart Terminal where you can track their changes. All data logs on usb uart for approximately every 1 sec when the data value changes.

void application_task ( void )
{
    uint8_t range_value;
    float lux_value;
    
    lightranger_start_single_shot_range_mode( &lightranger );
    
    lightranger_poll_range( &lightranger );
    lightranger_interrupts_clear( &lightranger );
    
    range_value = lightranger_get_distance( &lightranger );
    log_printf( &logger, "Proximity : %u mm\r\n", ( uint16_t ) range_value );

    lux_value = lightranger_get_ambiant_light( &lightranger, LIGHTRANGER_CMD_GAIN_1X );
    log_printf( &logger, "Ambient Light: %.2f lux\r\n", lux_value );

    log_printf( &logger, "*******************************************\r\n" );
    Delay_ms ( 500 );
}

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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