Proximity 15 Click

Proximity 15 Click is a compact add-on board that contains a close-range proximity sensing solution. This board features the VL53L1, a state-of-the-art, Time-of-Flight (ToF), a laser-ranging miniature sensor from STMicroelectronics.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Aug 2021.
• Type : I2C type

Software Support

We provide a library for the Proximity15 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 Proximity15 Click driver.

Standard key functions :

• proximity15_cfg_setup Config Object Initialization function.

  void proximity15_cfg_setup ( proximity15_cfg_t *cfg );

• proximity15_init Initialization function.

  err_t proximity15_init ( proximity15_t *ctx, proximity15_cfg_t *cfg );

• proximity15_default_cfg Click Default Configuration function.

  err_t proximity15_default_cfg ( proximity15_t *ctx );

Example key functions :

• proximity15_get_distance This function waits for the data ready, then reads the distance measured by the sensor in milimeters and clears interrupts.

  err_t proximity15_get_distance ( proximity15_t *ctx, uint16_t *distance );

• proximity15_set_inter_measurement_period This function programs the inter measurement period in miliseconds.

  err_t proximity15_set_inter_measurement_period ( proximity15_t *ctx, uint16_t time_ms );

• proximity15_set_timing_budget This function programs the timing budget in miliseconds.

  err_t proximity15_set_timing_budget ( proximity15_t *ctx, proximity15_timing_budget_t time );

Example Description

This example demonstrates the use of Proximity 15 Click board.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration which enables the sensor and sets it to long distance mode with 50ms timing budget and 100ms inter measurement periods.

void application_init ( void )
{
    log_cfg_t log_cfg;                  /**< Logger config object. */
    proximity15_cfg_t proximity15_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.
    proximity15_cfg_setup( &proximity15_cfg );
    PROXIMITY15_MAP_MIKROBUS( proximity15_cfg, MIKROBUS_1 );
    err_t init_flag = proximity15_init( &proximity15, &proximity15_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }

    init_flag = proximity15_default_cfg ( &proximity15 );
    if ( PROXIMITY15_ERROR == init_flag ) 
    {
        log_error( &logger, " Default Config Error. " );
        log_info( &logger, " Please, run program again... " );
        for ( ; ; );
    }

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

Application Task

Reads the distance measured by the sensor in milimeters and displays the value on the USB UART approximately every 100ms.

void application_task ( void )
{
    uint16_t distance = 0;

    if ( PROXIMITY15_OK == proximity15_get_distance ( &proximity15, &distance ) )
    {
        log_printf( &logger, " Distance(mm): %u\r\n\n", distance );
    }
}

Note

In order to measure longer distance, increase the timing budget and inter measurement periods.

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.Proximity15

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.