Opto Encoder 5 Click

Opto Encoder 5 Click is a compact add-on board that offers non-contact switching with unparalleled accuracy and precision. This board features the OPB666N, a Photologic® slotted optical switch from TT Electronics, ensuring top-notch performance and reliability. It integrates an 890nm infrared LED and a monolithic integrated circuit with a photodiode, linear amplifier, and Schmitt trigger, all powered effectively by a 5V supply from the mikroBUS™ power rail. The board features an NPN open-collector output configuration and is TTI/LST TL compatible, highlighting its ease of use and versatility.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Dec 2023.
• Type : GPIO type

Software Support

We provide a library for the Opto Encoder 5 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 Opto Encoder 5 Click driver.

Standard key functions :

• optoencoder5_cfg_setup Config Object Initialization function.

  void optoencoder5_cfg_setup ( optoencoder5_cfg_t *cfg );

• optoencoder5_init Initialization function.

  err_t optoencoder5_init ( optoencoder5_t *ctx, optoencoder5_cfg_t *cfg );

Example key functions :

• optoencoder5_enable This function enables the slotted optical switch of Opto Encoder 5 Click board.

  void optoencoder5_enable ( optoencoder5_t *ctx );

• optoencoder5_disable This function disables the slotted optical switch of Opto Encoder 5 Click board.

  void optoencoder5_disable ( optoencoder5_t *ctx );

• optoencoder5_get_out_state This function detecting slotted optical switch states of Opto Encoder 5 Click board.

  uint8_t optoencoder5_get_out_state ( optoencoder5_t *ctx );

Example Description

This example demonstrates the use of the Opto Encoder 5 Click board by detecting eclipse states.

The demo application is composed of two sections :

Application Init

Initialization of GPIO module, log UART and enables the slotted optical switch.

void application_init ( void ) 
{
    log_cfg_t log_cfg;                      /**< Logger config object. */
    optoencoder5_cfg_t optoencoder5_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.
    optoencoder5_cfg_setup( &optoencoder5_cfg );
    OPTOENCODER5_MAP_MIKROBUS( optoencoder5_cfg, MIKROBUS_1 );
    if ( DIGITAL_OUT_UNSUPPORTED_PIN == optoencoder5_init( &optoencoder5, &optoencoder5_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    optoencoder5_enable( &optoencoder5 );
    log_info( &logger, " Application Task " );
}

Application Task

When the beam from the slotted optical switch is broken by placing an object in the gap ( like a piece of paper ), the counter is incremented by one when the sensor is triggered.

void application_task ( void ) 
{
    out_state = optoencoder5_get_out_state( &optoencoder5 );
    if ( cmp_state != out_state )
    {
        if ( OPTOENCODER5_OUT_STATE_SWITCH_CLOSED == out_state )
        {
            log_printf( &logger, " Counter: %u \r\n", cnt );
            cnt++;
        }
        cmp_state = out_state;
    }
}

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.OptoEncoder5

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.