i2cisolator3

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I2C Isolator 3 Click

I2C Isolator 3 Click demo application is developed using the NECTO Studio, ensuring compatibility with mikroSDK's open-source libraries and tools. Designed for plug-and-play implementation and testing, the demo is fully compatible with all development, starter, and mikromedia boards featuring a mikroBUS™ socket.

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Click Library

• Author : Jelena Milosavljevic
• Date : Jul 2021.
• Type : I2C type

Software Support

Example Description

This is an example that demonstrates the use of the I2C Isolator 3 Click board. In this example, we measure temperature from the Thermo 20 Click connected to the I2C Isolator 3 Click board.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.I2CIsolator3

Example Key Functions

• i2cisolator3_cfg_setup Config Object Initialization function.

void i2cisolator3_cfg_setup ( i2cisolator3_cfg_t *cfg );

• i2cisolator3_init Initialization function.

err_t i2cisolator3_init ( i2cisolator3_t *ctx, i2cisolator3_cfg_t *cfg );

• i2cisolator3_send_cmd The function sends the desired command to a remote device wired with CPC5902, Optically Isolated I2C Bus Repeater on I2C Isolator 3 Click board.

void i2cisolator3_send_cmd ( i2cisolator3_t *ctx, uint8_t command );

• i2cisolator3_write_byte The function writes the byte of data to the targeted 8-bit register address of the remote device wired with CPC5902, Optically Isolated I2C Bus Repeater on I2C Isolator 3 Click board.

void i2cisolator3_write_byte ( i2cisolator3_t *ctx, uint8_t reg, uint8_t tx_data );

• i2cisolator3_read_byte The function read a the byte of data from the targeted 8-bit register address of the remote device wired with CPC5902, Optically Isolated I2C Bus Repeater on I2C Isolator 3 Click board.

uint8_t i2cisolator3_read_byte ( i2cisolator3_t *ctx, uint8_t reg );

Application Init

Initializes I2C and start to write log. Initialization driver enables - I2C, set I2C slave address of the Thermo 20 Click, performs software reset, also write log.

void application_init ( void ) 
{
    log_cfg_t log_cfg;                         /**< Logger config object. */
    i2cisolator3_cfg_t i2cisolator3_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.
    i2cisolator3_cfg_setup( &i2cisolator3_cfg );
    I2CISOLATOR3_MAP_MIKROBUS( i2cisolator3_cfg, MIKROBUS_POSITION_I2CISOLATOR3 );
    err_t init_flag = i2cisolator3_init( &i2cisolator3, &i2cisolator3_cfg );
    if ( I2C_MASTER_ERROR == init_flag ) {
        
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    log_printf( &logger, "  Driver Init. Done  \r\n" );
    log_printf( &logger, "  Set I2C Slave Address   \r\n" );
    log_printf( &logger, "  of the Thermo 20 Click   \r\n" );
    Delay_ms ( 100 );
    
    log_printf( &logger, "--------------------------\r\n" );
    log_printf( &logger, "      Software Reset      \r\n" );
    i2cisolator3_send_cmd(  &i2cisolator3, I2CISOLATOR3_THERMO20_CMD_RESET );
    Delay_ms ( 100 );

    log_printf( &logger, "--------------------------\r\n" );
    log_printf( &logger, "     Start Measuring      \r\n" );
    log_printf( &logger, "--------------------------\r\n" );
    Delay_ms ( 100 );

    log_info( &logger, " Application Task \r\n" );
}

Application Task

In this example via Thermo 20 Click we get the data processed by the function. When the function processes the data, we get the temperature information. All data logs write on USB UART changes every 3 sec.

void application_task ( void ) 
{
    i2cisolator3_send_cmd( &i2cisolator3, I2CISOLATOR3_THERMO20_CMD_CONVERSION );
    Delay_ms ( 100 );

    calculate_temperature( );

    log_printf( &logger, "Temperature : %.2f \r\n", temperature );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );    
}

Application Output

This Click board can be interfaced and monitored in two ways:

• Application Output - Use the "Application Output" window in Debug mode for real-time data monitoring. Set it up properly by following this tutorial.
• UART Terminal - Monitor data via the UART Terminal using a USB to UART converter. For detailed instructions, check out this tutorial.

Additional Notes and Information

The complete application code and a ready-to-use project are available through the NECTO Studio Package Manager for direct installation in the NECTO Studio. The application code can also be found on the MIKROE GitHub account.

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