adac2

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ADAC 2 Click

ADAC 2 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 : Sep 2022.
• Type : SPI type

Software Support

Example Description

This example demonstrates the use of ADAC 2 Click board by setting the DAC output (CIO) and reading the ADC results from a single-ended channel (AI4) and from a differential channel (AI5+, AI6-) as well as toggling all GPIO pins.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.ADAC2

Example Key Functions

• adac2_cfg_setup Config Object Initialization function.

void adac2_cfg_setup ( adac2_cfg_t *cfg );

• adac2_init Initialization function.

err_t adac2_init ( adac2_t *ctx, adac2_cfg_t *cfg );

• adac2_default_cfg Click Default Configuration function.

err_t adac2_default_cfg ( adac2_t *ctx );

• adac2_set_active_ain_channel This function sets the active analog input channel.

err_t adac2_set_active_ain_channel ( adac2_t *ctx, uint8_t channel );

• adac2_read_voltage This function reads RAW ADC value of previous conversion and converts it to voltage.

err_t adac2_read_voltage ( adac2_t *ctx, float fsr, float *voltage );

• adac2_write_dac This function sets the analog output by writing to the AO_DATA_WR register.

err_t adac2_write_dac ( adac2_t *ctx, int32_t dac );

Application Init

Initializes the driver and performs the Click default configuration which enables DAC voltage output, sets the analog input mode to single-ended for AI4 and differential (AI5+, AI6-), and enables all GPIOs as output.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    adac2_cfg_t adac2_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.
    adac2_cfg_setup( &adac2_cfg );
    ADAC2_MAP_MIKROBUS( adac2_cfg, MIKROBUS_POSITION_ADAC2 );
    if ( SPI_MASTER_ERROR == adac2_init( &adac2, &adac2_cfg ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( ADAC2_ERROR == adac2_default_cfg ( &adac2 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }
    
    log_info( &logger, " Application Task " );
}

Application Task

Reads the ADC results from a single-ended (AI4) and a differential (AI5+, AI6-) channels, then sets the raw DAC output increasing the value by 10000 after each iteration, and toggles all GPIO pins. The results will be displayed on the USB UART approximately once per second.

void application_task ( void )
{
    float voltage;
    if ( ADAC2_OK == adac2_set_active_ain_channel ( &adac2, ADAC2_CH_AI4_SINGLE_ENDED ) )
    {
        adac2_start_conversion ( &adac2, ADAC2_DATA_RATE_450_SPS );
        // Waits for the availability of the conversion result
        while ( adac2_get_rdy_pin ( &adac2 ) );
        adac2_stop_conversion ( &adac2 );
        if ( ADAC2_OK == adac2_read_voltage ( &adac2, ADAC2_FULL_SCALE_RANGE_12p5V, &voltage ) )
        {
            log_printf ( &logger, " Channel AI4 single-ended: %.2f V\r\n", voltage );
        }
    }
    if ( ADAC2_OK == adac2_set_active_ain_channel ( &adac2, ADAC2_CH_AI5_AI6_DIFFERENTIAL_25V ) )
    {
        adac2_start_conversion ( &adac2, ADAC2_DATA_RATE_450_SPS );
        // Waits for the availability of the conversion result
        while ( adac2_get_rdy_pin ( &adac2 ) );
        adac2_stop_conversion ( &adac2 );
        if ( ADAC2_OK == adac2_read_voltage ( &adac2, ADAC2_FULL_SCALE_RANGE_25V, &voltage ) )
        {
            log_printf ( &logger, " Channel AI5-AI6 differential: %.2f V\r\n", voltage );
        }
    }
    
    static int32_t dac = ADAC2_DAC_MIN_VALUE;
    if ( ADAC2_OK == adac2_write_dac ( &adac2, dac ) )
    {
        log_printf ( &logger, " DAC: %ld\r\n", dac );
        dac += 5000;
        if ( dac > ADAC2_DAC_MAX_VALUE )
        {
            dac = ADAC2_DAC_MIN_VALUE;
        }
    }
    
    uint32_t gpio_data;
    if ( ADAC2_OK == adac2_read_register ( &adac2, ADAC2_REG_GEN_GPIO_CTRL, &gpio_data ) )
    {
        gpio_data ^= ADAC2_GPIO_ALL_MASK;
        if ( ADAC2_OK == adac2_write_register ( &adac2, ADAC2_REG_GEN_GPIO_CTRL, gpio_data ) )
        {
            log_printf ( &logger, " GPIO: 0x%.2X\r\n\n", ( uint16_t ) ( gpio_data & ADAC2_GPIO_ALL_MASK ) );
        }
    }
    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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