Proximity 14 click

Proximity 14 Click is a compact add-on board that contains a close-range proximity sensing solution. This board features the VCNL36825T, a fully integrated proximity sensor from Vishay Semiconductors.

click Product page

Click library

• Author : Luka Filipovic
• Date : Jun 2021.
• Type : I2C type

Software Support

We provide a library for the Proximity14 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 Proximity14 Click driver.

Standard key functions :

• proximity14_cfg_setup Config Object Initialization function.

  void proximity14_cfg_setup ( proximity14_cfg_t *cfg );

• proximity14_init Initialization function.

  err_t proximity14_init ( proximity14_t *ctx, proximity14_cfg_t *cfg );

• proximity14_default_cfg Click Default Configuration function.

  err_t proximity14_default_cfg ( proximity14_t *ctx );

Example key functions :

• proximity14_generic_write Writing function.

  err_t proximity14_generic_write ( proximity14_t *ctx, uint8_t reg, uint16_t tx_data );

• proximity14_generic_read Reading function.

  err_t proximity14_generic_read ( proximity14_t *ctx, uint8_t reg, uint16_t *rx_data );

• proximity14_get_int Get INT pin state.

  uint8_t proximity14_get_int ( proximity14_t *ctx );

Example Description

This example showcases the ability of the device to read proximity value. It can be configured to detect objects up to 20cm of distance.

The demo application is composed of two sections :

Application Init

Initialization of host communication modules (UART, I2C) and additional pins. Reads device ID and sets default configuration.

void application_init ( void ) 
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    proximity14_cfg_t proximity14_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.
    proximity14_cfg_setup( &proximity14_cfg );
    PROXIMITY14_MAP_MIKROBUS( proximity14_cfg, MIKROBUS_1 );
    err_t init_flag = proximity14_init( &proximity14, &proximity14_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) 
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    init_flag |= proximity14_default_cfg ( &proximity14 );
    if ( PROXIMITY14_OK != init_flag ) 
    {
        log_error( &logger, " Default configuration. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    uint16_t temp_data = 0;
    init_flag = proximity14_generic_read( &proximity14, PROXIMITY14_REG_ID, &temp_data );
    log_printf( &logger, " > ID: 0x%.4X\r\n", temp_data );

    log_info( &logger, " Application Task " );
    Delay_ms ( 1000 );
}

Application Task

In span of 100ms reads proximity data from device and logs result.

void application_task ( void ) 
{
    uint16_t temp_data = 0;
    proximity14_generic_read( &proximity14, PROXIMITY14_REG_DATA, &temp_data );
    log_printf( &logger, " > Data: %u\r\n", temp_data );
    Delay_ms ( 100 );
}

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.Proximity14

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.