isoadc

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ISO ADC Click

ISO ADC 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 : Feb 2024.
• Type : SPI type

Software Support

Example Description

This example demonstrates the use of ISO ADC Click board by reading the shunt voltage, current, and power.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.ISOADC

Example Key Functions

• isoadc_cfg_setup Config Object Initialization function.

void isoadc_cfg_setup ( isoadc_cfg_t *cfg );

• isoadc_init Initialization function.

err_t isoadc_init ( isoadc_t *ctx, isoadc_cfg_t *cfg );

• isoadc_read_voltage This function reads a raw ADC in ISOADC_ADC_NUM_AVERAGES number of samples and converts it to a shunt voltage in millivolts.

err_t isoadc_read_voltage ( isoadc_t *ctx, float *voltage );

• isoadc_get_current This function converts a shunt voltage input to a load current in milliampers.

float isoadc_get_current ( float voltage );

• isoadc_get_power This function converts a shunt voltage input to electrical power in watts.

float isoadc_get_power ( isoadc_t *ctx, float voltage );

Application Init

Initializes the driver and sets the external voltage reference.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    isoadc_cfg_t isoadc_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.
    isoadc_cfg_setup( &isoadc_cfg );
    ISOADC_MAP_MIKROBUS( isoadc_cfg, MIKROBUS_1 );
    if ( SPI_MASTER_ERROR == isoadc_init( &isoadc, &isoadc_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    isoadc_set_vext ( &isoadc, ISOADC_VEXT_5V );
    
    log_info( &logger, " Application Task " );
}

Application Task

Reads a 10 samples of a shunt voltage measurement, then averages and calculates the current and power from it. All data is displayed on the USB UART.

void application_task ( void )
{
    float voltage = 0;
    float avg_voltage = 0;
    uint16_t avg_cnt = 0; 

    log_printf( &logger, " --- MEASUREMENT IN PROGRESS ---\r\n" );
    log_info( &logger, "Keep the load and power supply stable during the measurement process\r\n" );

    while ( avg_cnt < ISOADC_VOLTAGE_NUM_AVERAGES )
    {
        if ( ISOADC_OK == isoadc_read_voltage ( &isoadc, &voltage ) )
        {
            avg_voltage += voltage;
            avg_cnt++;
        }
    }
    voltage = avg_voltage / ISOADC_VOLTAGE_NUM_AVERAGES;
    log_printf( &logger, " Shunt Voltage: %.1f mV\r\n", voltage );
    log_printf( &logger, " Current: %.3f mA\r\n", isoadc_get_current ( voltage ) );
    log_printf( &logger, " Power: %.3f W\r\n", isoadc_get_power ( &isoadc, voltage ) );
    log_printf( &logger, "-------------------------\r\n\n" );
    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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