DAC 14 Click

DAC 14 Click is a compact add-on board providing highly accurate digital-to-analog conversion. This board features the DAC53202, a 10-bit dual-channel programmable voltage/current-output DAC from Texas Instruments. The DAC53202 supports high-speed I2C and SPI serial interface alongside Hi-Z Power-Down mode and Hi-Z output during Power-OFF conditions. It has a programmable comparator mode for both DAC channels and one general-purpose I/O pin configurable as multiple functions allowing this smart DAC for processor-less applications.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Dec 2022.
• Type : I2C/SPI type

Software Support

We provide a library for the DAC 14 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 DAC 14 Click driver.

Standard key functions :

• dac14_cfg_setup Config Object Initialization function.

  void dac14_cfg_setup ( dac14_cfg_t *cfg );

• dac14_init Initialization function.

  err_t dac14_init ( dac14_t *ctx, dac14_cfg_t *cfg );

• dac14_default_cfg Click Default Configuration function.

  err_t dac14_default_cfg ( dac14_t *ctx );

Example key functions :

• dac14_set_dac_data This function sets the raw DAC data for the selected DAC channel.

  err_t dac14_set_dac_data ( dac14_t *ctx, uint8_t dac, uint16_t dac_data );

• dac14_start_function_gen This function starts the function generator for the selected DAC channel.

  err_t dac14_start_function_gen ( dac14_t *ctx, uint8_t dac );

• dac14_config_function_gen This function configures the function generator for the selected DAC channel.

  err_t dac14_config_function_gen ( dac14_t *ctx, uint8_t dac, uint8_t waveform, uint8_t code_step, uint8_t slew_rate );

Example Description

This example demonstrates the use of DAC 14 Click board by changing the voltage level on the OUT0 as well as the waveform signals from a function generator on the OUT1.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the Click default configuration.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    dac14_cfg_t dac14_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.
    dac14_cfg_setup( &dac14_cfg );
    DAC14_MAP_MIKROBUS( dac14_cfg, MIKROBUS_1 );
    err_t init_flag = dac14_init( &dac14, &dac14_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( DAC14_ERROR == dac14_default_cfg ( &dac14 ) )
    {
        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 both outputs will be displayed on the USB UART.

void application_task ( void )
{
    static uint16_t dac = 0;
    static uint8_t waveform = DAC14_WAVEFORM_TRIANGULAR;
    if ( DAC14_OK == dac14_set_dac_data ( &dac14, DAC14_SEL_DAC_0, dac ) )
    {
        log_printf( &logger, "\r\n OUT0: %u -> %.2f V\r\n", 
                    dac, ( float ) dac * DAC14_VDD_3V3 / DAC14_DAC_DATA_MAX );
        dac += 100;
        if ( dac > DAC14_DAC_DATA_MAX )
        {
            dac = DAC14_DAC_DATA_MIN;
        }
    }
    err_t error_flag = dac14_stop_function_gen ( &dac14, DAC14_SEL_DAC_1 );
    error_flag |= dac14_config_function_gen ( &dac14, DAC14_SEL_DAC_1, waveform,
                                              DAC14_CODE_STEP_32_LSB, DAC14_SLEW_RATE_4_US );
    error_flag |= dac14_start_function_gen ( &dac14, DAC14_SEL_DAC_1 );
    if ( DAC14_OK == error_flag )
    {
        log_printf( &logger, " OUT1: " );
        switch ( waveform )
        {
            case DAC14_WAVEFORM_TRIANGULAR:
            {
                log_printf( &logger, "triangular wave at about 4kHz\r\n" );
                waveform = DAC14_WAVEFORM_SAWTOOTH;
                break;
            }
            case DAC14_WAVEFORM_SAWTOOTH:
            {
                log_printf( &logger, "sawtooth wave at about 7.8kHz\r\n" );
                waveform = DAC14_WAVEFORM_INV_SAWTOOTH;
                break;
            }
            case DAC14_WAVEFORM_INV_SAWTOOTH:
            {
                log_printf( &logger, "inverse sawtooth wave at about 7.8kHz\r\n" );
                waveform = DAC14_WAVEFORM_SINE;
                break;
            }
            case DAC14_WAVEFORM_SINE:
            {
                log_printf( &logger, "sine wave at about 10.7kHz\r\n" );
                waveform = DAC14_WAVEFORM_DISABLE;
                break;
            }
            case DAC14_WAVEFORM_DISABLE:
            {
                log_printf( &logger, "function generator disabled\r\n" );
                waveform = DAC14_WAVEFORM_TRIANGULAR;
                break;
            }
            default:
            {
                log_printf( &logger, "unknown state\r\n" );
                break;
            }
        }
    }
    Delay_ms ( 1000 );
    Delay_ms ( 1000 );
    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.DAC14

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.