Opto 2 click

Opto 2 click is a galvanic isolator Click board™, used to provide an optical isolation of sensitive microcontroller (MCU) pins, when operated by external signals.

click Product page

Click library

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

Software Support

We provide a library for the Opto2 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 Opto2 Click driver.

Standard key functions :

• Config Object Initialization function.

  void opto2_cfg_setup ( opto2_cfg_t *cfg );

• Initialization function.

  OPTO2_RETVAL opto2_init ( opto2_t ctx, opto2_cfg_t cfg );

Example key functions :

• OUT1 Check function.

  uint8_t opto2_check_out1 ( opto2_t *ctx );

• OUT2 Check function.

  uint8_t opto2_check_out2 ( opto2_t *ctx );

• OUT3 Check function.

  uint8_t opto2_check_out3 ( opto2_t *ctx );

Examples Description

This application used to provide an optical isolation of sensitive microcontroller.

The demo application is composed of two sections :

Application Init

Initializes device selects the outputs (OUT1 - OUT4) which state be checked.

void application_init ( void )
{
    log_cfg_t log_cfg;
    opto2_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 );

    opto2_cfg_setup( &cfg );
    OPTO2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    opto2_init( &opto2, &cfg );

    log_info( &logger, "---- Application Init ----" );

    opto2_set_logger( 1, 1, 0, 0 );
    log_printf( &logger, "OPTO 2 is initialized \r\n" );
    log_printf( &logger, "" );
    Delay_ms ( 200 );
}

Application Task

Performs the check procedure for selected outputs and logs the states from that outputs on USB UART. Repeat the check procedure every 2 seconds.

void application_task ( void )
{
    tmp = 1;

    for ( cnt = 0; cnt < 4; cnt++ )
    {
        switch ( sel_output & tmp )
        {
            case 0x01 :
            {
                check_output = opto2_check_out1( &opto2 );

                if ( check_output == 0 )
                {
                    log_printf( &logger, "OUT1 is low %d\r\n" );
                }
                else
                {
                    log_printf( &logger, "OUT1 is high %d\r\n" );
                }
                break;
            }
            case 0x02 :
            {
                check_output = opto2_check_out2( &opto2 );

                if ( check_output == 0 )
                {
                    log_printf( &logger, "OUT2 is low %d\r\n" );
                }
                else
                {
                    log_printf( &logger, "OUT2 is high %d\r\n" );
                }
                break;
            }
            case 0x04 :
            {
                check_output = opto2_check_out3( &opto2 );

                if ( check_output == 0 )
                {
                    log_printf( &logger, "OUT3 is low %d\r\n" );
                }
                else
                {
                    log_printf( &logger, "OUT3 is high %d\r\n" );
                }
                break;
            }
            case 0x08 :
            {
                check_output = opto2_check_out4( &opto2 );

                if ( check_output == 0 )
                {
                    log_printf( &logger, "OUT4 is low %d\r\n" );
                }
                else
                {
                    log_printf( &logger, "OUT4 is high %d\r\n" );
                }
                break;
            }
            default :
            {
                break;
            }
        }

    tmp <<= 1;
    }

    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
}  

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.Opto2

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.