DIGI Isolator 2 Click

DIGI Isolator 2 Click is a compact add-on board that provides isolated digital input signals to your application. This board features the ISO1228, an eight-channel isolated digital input from Texas Instruments. It comes with 8-channel isolated 24V digital input receivers, with a current limit and diagnostics. The device also provides a field-side input-current-powered LED indication to reduce system power dissipation and reduce the board temperatures.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Oct 2023.
• Type : SPI type

Software Support

We provide a library for the DIGI Isolator 2 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 DIGI Isolator 2 Click driver.

Standard key functions :

• digiisolator2_cfg_setup Config Object Initialization function.

  void digiisolator2_cfg_setup ( digiisolator2_cfg_t *cfg );

• digiisolator2_init Initialization function.

  err_t digiisolator2_init ( digiisolator2_t *ctx, digiisolator2_cfg_t *cfg );

• digiisolator2_default_cfg Click Default Configuration function.

  err_t digiisolator2_default_cfg ( digiisolator2_t *ctx );

Example key functions :

• digiisolator2_enable_output This function enables output by setting the EN pin to high state.

  void digiisolator2_enable_output ( digiisolator2_t *ctx );

• digiisolator2_disable_output This function disables output by setting the EN pin to low state.

  void digiisolator2_disable_output ( digiisolator2_t *ctx );

• digiisolator2_read_inputs This function reads all inputs state via the selected driver interface.

  err_t digiisolator2_read_inputs ( digiisolator2_t *ctx, uint8_t *data_out );

Example Description

This example demonstrates the use of DIGI Isolator 2 Click board by reading and displaying the state of 8 digital input channels.

The demo application is composed of two sections :

Application Init

Initializes the driver and enables isolator outputs.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    digiisolator2_cfg_t digiisolator2_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.
    digiisolator2_cfg_setup( &digiisolator2_cfg );
    DIGIISOLATOR2_MAP_MIKROBUS( digiisolator2_cfg, MIKROBUS_1 );
    if ( DIGIISOLATOR2_OK != digiisolator2_init( &digiisolator2, &digiisolator2_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    digiisolator2_enable_output( &digiisolator2 );

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

Application Task

Reads the state of 8 digital input channels in hex format where MSB represents IN8 and LSB the channel IN1. The results are displayed on the USB UART every 500ms.

void application_task ( void )
{
    uint8_t input_data = 0;
    if ( DIGIISOLATOR2_OK == digiisolator2_read_inputs ( &digiisolator2, &input_data ) )
    {
        log_printf( &logger, " INPUT: 0x%.2X\r\n\n", ( uint16_t ) input_data );
        Delay_ms ( 500 );
    }
}

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.DIGIIsolator2

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.