LightRanger 11 click

LightRanger 11 Click is a compact add-on board suitable for range-finding and distance-sensing applications. This board features the VL53L7CX, a time-of-flight 8x8 multizone ranging sensor from STMicroelectronics. It is a fast and accurate multizone distance-ranging sensor width of 90° wide FoV. The multizone-ranging output with either 4x4 or 8x8 separate zones, width multitarget detection, and distance measurement in each zone. As a multizone-ranging device, its range is only up to 350cm.

click Product page

Click library

• Author : Nenad Filipovic
• Date : Aug 2023.
• Type : I2C type

Software Support

We provide a library for the LightRanger 11 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.

Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Library Description

This library contains API for LightRanger 11 Click driver.

Standard key functions :

• lightranger11_cfg_setup Config Object Initialization function.

  void lightranger11_cfg_setup ( lightranger11_cfg_t *cfg );

• lightranger11_init Initialization function.

  err_t lightranger11_init ( lightranger11_t *ctx, lightranger11_cfg_t *cfg );

• lightranger11_default_cfg Click Default Configuration function.

  err_t lightranger11_default_cfg ( lightranger11_t *ctx );

Example key functions :

• lightranger11_get_ranging_data LightRanger 11 get ranging data function.

  err_t lightranger11_get_ranging_data ( lightranger11_t *ctx, lightranger11_results_data_t *results );

• lightranger11_get_resolution LightRanger 11 get resolution function.

  err_t lightranger11_get_resolution ( lightranger11_t *ctx, uint8_t *resolution );

• lightranger11_get_int_pin LightRanger 11 get int pin function.

  uint8_t lightranger11_get_int_pin ( lightranger11_t *ctx );

Example Description

This example demonstrates the use of LightRanger 11 click board by reading and displaying 8x8 zones measurements on the USB UART.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the click default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    lightranger11_cfg_t lightranger11_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.
    lightranger11_cfg_setup( &lightranger11_cfg );
    LIGHTRANGER11_MAP_MIKROBUS( lightranger11_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == lightranger11_init( &lightranger11, &lightranger11_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( LIGHTRANGER11_ERROR == lightranger11_default_cfg ( &lightranger11 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Reads all zone measurements approximately every 500ms and logs them to the USB UART as an 8x8 map. The silicon temperature measurement in degrees Celsius is also displayed.

void application_task ( void ) 
{
    if ( !lightranger11_get_int_pin ( &lightranger11 ) )
    {
        lightranger11_results_data_t results;
        uint8_t resolution, map_side;
        err_t error_flag = lightranger11_get_resolution ( &lightranger11, &resolution );
        error_flag |= lightranger11_get_ranging_data ( &lightranger11, &results );
        if ( LIGHTRANGER11_OK == error_flag )
        {
            map_side = ( LIGHTRANGER11_RESOLUTION_4X4 == resolution ) ? 4 : 8;
            log_printf ( &logger, "\r\n %ux%u MAP (mm):\r\n", ( uint16_t ) map_side, ( uint16_t ) map_side );
            for ( uint16_t cnt = 1; cnt <= resolution; cnt++ )
            {
                log_printf ( &logger, " %u\t", results.distance_mm[ cnt - 1 ] );
                if ( 0 == ( cnt % map_side ) )
                {
                    log_printf ( &logger, "\r\n" );
                }
            }
            log_printf ( &logger, " Silicon temperature : %d degC\r\n", ( int16_t ) results.silicon_temp_degc );
        }
    }
}

The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.

Other Mikroe Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.LightRanger11

Additional notes and informations

Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.