Opto Encoder click

Opto Encoder click is a linear incremental optical sensor/encoder click, which can be used for the movement or rotation encoding.

click Product page

Click library

• Author : MikroE Team
• Date : Dec 2019.
• Type : GPIO type

Software Support

We provide a library for the OptoEncoder 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for OptoEncoder Click driver.

Standard key functions :

• Config Object Initialization function.

  void optoencoder_cfg_setup ( optoencoder_cfg_t *cfg );

• Initialization function.

  OPTOENCODER_RETVAL optoencoder_init ( optoencoder_t ctx, optoencoder_cfg_t cfg );

Example key functions :

• Function for reading O1 state

  uint8_t optoencoder_getO1 ( optoencoder_t *ctx );

• Initialization function

  void optoencoder_init_dev ( optoencoder_t *ctx );

• Function for reading the position of the encoder

  int16_t optoencoder_get_position ( optoencoder_t *ctx );

Examples Description

This application is used to encode motion or rotation.

The demo application is composed of two sections :

Application Init

Initializes driver and opto encoder.

void application_init ( void )
{
    log_cfg_t log_cfg;
    optoencoder_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.

    optoencoder_cfg_setup( &cfg );
    OPTOENCODER_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    optoencoder_init( &optoencoder, &cfg );

    optoencoder_init_dev( &optoencoder );
}

Application Task

Depending on the direction of the movement it increments/decrements the step counter.

void application_task ( )
{
    int16_t new_step;
    new_step = optoencoder_get_position( &optoencoder );
    if ( old_step != new_step)
    {
        log_printf( &logger, "Step: %d \r\n", new_step );
        old_step = new_step;
    }
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.OptoEncoder

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.