dac16

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DAC 16 Click

DAC 16 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 : Apr 2024.
• Type : I2C/SPI type

Software Support

Example Description

This example demonstrates the use of DAC 16 Click board by changing the voltage level on the OUT0 as well as the waveform signals from a function generator on the OUT1.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.DAC16

Example Key Functions

• dac16_cfg_setup Config Object Initialization function.

void dac16_cfg_setup ( dac16_cfg_t *cfg );

• dac16_init Initialization function.

err_t dac16_init ( dac16_t *ctx, dac16_cfg_t *cfg );

• dac16_default_cfg Click Default Configuration function.

err_t dac16_default_cfg ( dac16_t *ctx );

• dac16_set_dac_data This function sets the raw DAC data for the selected DAC channel.

err_t dac16_set_dac_data ( dac16_t *ctx, uint8_t dac, uint16_t dac_data );

• dac16_start_function_gen This function starts the function generator for the selected DAC channel.

err_t dac16_start_function_gen ( dac16_t *ctx, uint8_t dac );

• dac16_stop_function_gen This function stops the function generator for the selected DAC channel.

err_t dac16_stop_function_gen ( dac16_t *ctx, uint8_t dac );

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    dac16_cfg_t dac16_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.
    dac16_cfg_setup( &dac16_cfg );
    DAC16_MAP_MIKROBUS( dac16_cfg, MIKROBUS_1 );
    err_t init_flag = dac16_init( &dac16, &dac16_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }
    
    if ( DAC16_ERROR == dac16_default_cfg ( &dac16 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

    log_info( &logger, " Application Task " );
}

Application Task

Changes the voltage level on the OUT0 as well as the waveform signals from a function generator on the OUT1 every 3 seconds. The state of all outputs will be displayed on the USB UART.

void application_task ( void )
{
    static uint16_t dac = 0;
    static uint8_t waveform = DAC16_WAVEFORM_TRIANGULAR;
    if ( DAC16_OK == dac16_set_dac_data ( &dac16, DAC16_SEL_DAC_0, dac ) )
    {
        log_printf( &logger, "\r\n OUT0: %u -> %.2f V\r\n", 
                    dac, ( float ) dac * DAC16_VDD_3V3 / DAC16_DAC_DATA_MAX );
        dac += 100;
        if ( dac > DAC16_DAC_DATA_MAX )
        {
            dac = DAC16_DAC_DATA_MIN;
        }
    }
    err_t error_flag = dac16_stop_function_gen ( &dac16, DAC16_SEL_DAC_1 );
    error_flag |= dac16_config_function_gen ( &dac16, DAC16_SEL_DAC_1, waveform,
                                              DAC16_CODE_STEP_32_LSB, DAC16_SLEW_RATE_4_US );
    error_flag |= dac16_start_function_gen ( &dac16, DAC16_SEL_DAC_1 );
    if ( DAC16_OK == error_flag )
    {
        log_printf( &logger, " OUT1: " );
        switch ( waveform )
        {
            case DAC16_WAVEFORM_TRIANGULAR:
            {
                log_printf( &logger, "triangular wave at about 1kHz\r\n" );
                waveform = DAC16_WAVEFORM_SAWTOOTH;
                break;
            }
            case DAC16_WAVEFORM_SAWTOOTH:
            {
                log_printf( &logger, "sawtooth wave at about 2kHz\r\n" );
                waveform = DAC16_WAVEFORM_INV_SAWTOOTH;
                break;
            }
            case DAC16_WAVEFORM_INV_SAWTOOTH:
            {
                log_printf( &logger, "inverse sawtooth wave at about 2kHz\r\n" );
                waveform = DAC16_WAVEFORM_SINE;
                break;
            }
            case DAC16_WAVEFORM_SINE:
            {
                log_printf( &logger, "sine wave at about 10.5kHz\r\n" );
                waveform = DAC16_WAVEFORM_DISABLE;
                break;
            }
            case DAC16_WAVEFORM_DISABLE:
            {
                log_printf( &logger, "function generator disabled\r\n" );
                waveform = DAC16_WAVEFORM_TRIANGULAR;
                break;
            }
            default:
            {
                log_printf( &logger, "unknown state\r\n" );
                break;
            }
        }
        // OUT2 and OUT3 are set in dac16_default_cfg
        log_printf( &logger, " OUT2: sine wave at about 10.5kHz\r\n" );
        log_printf( &logger, " OUT3: sawtooth wave at about 2kHz\r\n" );
    }
    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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