I2C Isolator 2 Click

I2C Isolator 2 Click provides I2C lines and power isolation for slave devices. It carries the ADM3260 dual I2C isolator with an integrated DC-to-DC converter. I2C Isolator 2 Click is designed to run on either 3.3V or 5V power supply.

Click Product page

Click library

• Author : MikroE Team
• Date : May 2020.
• Type : I2C type

Software Support

We provide a library for the I2CIsolator2 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 I2CIsolator2 Click driver.

Standard key functions :

• i2cisolator2_cfg_setup Config Object Initialization function.

  void i2cisolator2_cfg_setup ( i2cisolator2_cfg_t *cfg ); 

• i2cisolator2_init Initialization function.

  err_t i2cisolator2_init ( i2cisolator2_t *ctx, i2cisolator2_cfg_t *cfg );

• i2cisolator2_enable_power This function sets PDIS pin state.

  void i2cisolator2_enable_power ( i2cisolator2_t *ctx, uint8_t state );

Example key functions :

• i2cisolator2_write This function writes a desired data to I2C bus.

  err_t i2cisolator2_write ( i2cisolator2_t *ctx, uint8_t *data_in, uint16_t len );

• i2cisolator2_read This function reads a desired number of data bytes from I2C bus.

  err_t i2cisolator2_read ( i2cisolator2_t *ctx, uint8_t *data_out, uint16_t len );

• i2cisolator2_set_slave_address This function sets the slave address.

  err_t i2cisolator2_set_slave_address ( i2cisolator2_t *ctx, uint8_t slave_addr );

Examples Description

This example showcases how to initialize, configure and use the I2C Isolator 2 Click module. The Click provides I2C lines and power isolation for slave devices. In order for this example to work, you need the EEPROM 3 Click.

The demo application is composed of two sections :

Application Init

Initializes the driver and enables the power output.

void application_init ( void )
{
    log_cfg_t log_cfg;
    i2cisolator2_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.
    i2cisolator2_cfg_setup( &cfg );
    I2CISOLATOR2_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    i2cisolator2_init( &i2cisolator2, &cfg );

    i2cisolator2_enable_power( &i2cisolator2, I2CISOLATOR2_POWER_ENABLE );
    Delay_ms ( 100 );

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

Application Task

Writes the desired message to EEPROM 3 Click board and reads it back every 2 seconds. All data is being displayed on the USB UART where you can track the program flow.

void application_task ( void )
{
    uint8_t read_buf[ 100 ] = { 0 };
    if ( I2CISOLATOR2_OK == eeprom3_write_page ( EEPROM3_MEMORY_ADDRESS, EEPROM3_DEMO_TEXT, 
                                                 strlen( EEPROM3_DEMO_TEXT ) ) )
    {
        log_printf( &logger, " Demo text message is written to EEPROM 3 Click!\r\n" );
    }
    Delay_ms ( 1000 );

    if ( I2CISOLATOR2_OK == eeprom3_read_page ( EEPROM3_MEMORY_ADDRESS, read_buf, 
                                                strlen( EEPROM3_DEMO_TEXT ) ) )
    {
        read_buf[ strlen( EEPROM3_DEMO_TEXT ) ] = 0;
        log_printf( &logger, " Read data: \"%s\"\r\n\n", read_buf );
    }
    Delay_ms ( 1000 );
}  

Note

Make sure to provide the VCC power supply on VCC pin and EEPROM 3 Click.

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.I2CIsolator2

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.