current7

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Current 7 Click

Current 7 Click is a compact add-on board providing a precise and accurate current sensing solution. This board features the INA282, a wide common-mode range, bidirectional, high-accuracy current shunt monitor from Texas Instruments. The INA282 represents a voltage output current shunt monitor that can sense drops across shunts at common-mode voltages from –14 V to +80 V, independent of the supply voltage, which operates in a range from 2.7V up to 18V supply. The zero-drift topology enables high-precision measurements with maximum input offset voltages as low as 70μV. Also, the user is allowed to process the output signal in analog or digital form.

Click Product page

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Click library

• Author : Nenad Filipovic
• Date : Nov 2021.
• Type : I2C type

Software Support

We provide a library for the Current 7 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 Current 7 Click driver.

Standard key functions :

• current7_cfg_setup Config Object Initialization function.

void current7_cfg_setup ( current7_cfg_t *cfg );

• current7_init Initialization function.

err_t current7_init ( current7_t *ctx, current7_cfg_t *cfg );

Example key functions :

• current7_read_voltage This function reads raw ADC value and converts it to proportional voltage level.

err_t current7_read_voltage ( current7_t *ctx, float *voltage );

• current7_get_current This function reads the input current level [A] based on CURRENT7_NUM_CONVERSIONS of voltage measurements.

err_t current7_get_current ( current7_t *ctx, float *current );

• current7_set_vref This function sets the voltage reference for Current 7 Click driver.

err_t current7_set_vref ( current7_t *ctx, float vref );

Example Description

This library contains API for Current 7 Click driver. The demo application reads current ( A ).

The demo application is composed of two sections :

Application Init

Initializes I2C or AN driver and log UART.

void application_init ( void ) 
{
    log_cfg_t log_cfg;            /**< Logger config object. */
    current7_cfg_t current7_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.
    current7_cfg_setup( &current7_cfg );
    CURRENT7_MAP_MIKROBUS( current7_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == current7_init( &current7, &current7_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

This is an example that demonstrates the use of the Current 7 Click board™. In this example, we read and display the current ( A ) data. Results are being sent to the Usart Terminal where you can track their changes.

void application_task ( void ) 
{
    float current = 0;
    current7_get_current( &current7, &current );
    log_printf( &logger, " Current : %.3f A\r\n", current );
    log_printf( &logger, "--------------------\r\n" );
    Delay_ms ( 1000 );
}

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.Current7

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.

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