currentsens

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Current Sens Click

Current Sens 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 : Stefan Filipovic
• Date : Oct 2024.
• Type : ADC/SPI type

Software Support

Example Description

This example demonstrates the use of Current Sens Click board by reading and displaying the input current measurements.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.CurrentSens

Example Key Functions

• currentsens_cfg_setup Config Object Initialization function.

  void currentsens_cfg_setup ( currentsens_cfg_t *cfg );

• currentsens_init Initialization function.

  err_t currentsens_init ( currentsens_t *ctx, currentsens_cfg_t *cfg );

• currentsens_calib_offset This function calibrates the zero current offset value.

  err_t currentsens_calib_offset ( currentsens_t *ctx );

• currentsens_calib_resolution This function calibrates the data resolution at the known load current.

  err_t currentsens_calib_resolution ( currentsens_t *ctx, float calib_current );

• currentsens_read_current This function reads the input current level [A].

  err_t currentsens_read_current ( currentsens_t *ctx, float *current );

Application Init

Initializes the driver and calibrates the zero current offset and data resolution at 3A load current.

void application_init ( void )
{
    log_cfg_t log_cfg;  
    currentsens_cfg_t currentsens_cfg;  

    LOG_MAP_USB_UART( log_cfg );
    log_init( &logger, &log_cfg );
    log_info( &logger, " Application Init " );
 
    // Click initialization.
    currentsens_cfg_setup( &currentsens_cfg );
    CURRENTSENS_MAP_MIKROBUS( currentsens_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == currentsens_init( &currentsens, &currentsens_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_printf( &logger, " Calibrating zero current offset in 5 seconds...\r\n" );
    log_printf( &logger, " Make sure no current flows through the sensor during the calibration process.\r\n" );
    for ( uint8_t cnt = 5; cnt > 0; cnt-- )
    {
        log_printf( &logger, " %u\r\n", ( uint16_t ) cnt );
        Delay_ms ( 1000 );
    }
    if ( CURRENTSENS_ERROR == currentsens_calib_offset ( &currentsens ) )
    {
        log_error( &logger, " Calibrate offset." );
        for ( ; ; );
    }
    log_printf( &logger, " Offset calibration DONE.\r\n\n" );
 
    log_printf( &logger, " Calibrating data resolution in 5 seconds...\r\n" );
    log_printf( &logger, " Keep the load current set at %.1fA during the calibration process.\r\n", 
                CURRENTSENS_CALIBRATING_CURRENT );
    for ( uint8_t cnt = 5; cnt > 0; cnt-- )
    {
        log_printf( &logger, " %u\r\n", ( uint16_t ) cnt );
        Delay_ms ( 1000 );
    }
    if ( CURRENTSENS_ERROR == currentsens_calib_resolution ( &currentsens, CURRENTSENS_CALIBRATING_CURRENT ) )
    {
        log_error( &logger, " Calibrate resolution." );
        for ( ; ; );
    }
    log_printf( &logger, " Data resolution calibration DONE.\r\n" );
    
    log_info( &logger, " Application Task " );
}

Application Task

Reads the input current measurements and displays the results on the USB UART approximately once per second.

void application_task ( void )
{
    float current = 0;
    if ( CURRENTSENS_OK == currentsens_read_current ( &currentsens, &current ) ) 
    {
        log_printf( &logger, " Current : %.1f A\r\n\n", current );
        Delay_ms ( 1000 );
    }
}

Note

The measurement range is approximately: +/- 85A.

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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