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DAC 11 Click

DAC 11 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.

Click Library

  • Author : Stefan Filipovic
  • Date : Jul 2021.
  • Type : SPI type

Software Support

Example Description

This example demonstrates the use of DAC 11 Click board.

Example Libraries

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.DAC11

Example Key Functions

  • dac11_cfg_setup Config Object Initialization function.
void dac11_cfg_setup ( dac11_cfg_t *cfg );
  • dac11_init Initialization function.
err_t dac11_init ( dac11_t *ctx, dac11_cfg_t *cfg );
  • dac11_default_cfg Click Default Configuration function.
err_t dac11_default_cfg ( dac11_t *ctx );
  • dac11_write_control_reg This function writes data to a single control register by using SPI serial interface.
err_t dac11_write_control_reg( dac11_t *ctx, uint8_t cmd, uint16_t data_in );
  • dac11_set_all_ch_voltage This function sets the output voltage of all channels depending on the vref value defined by the VCC SEL on-board jumper. The VREF and Voltage values can be either in Volts or Milivolts.
err_t dac11_set_all_ch_voltage( dac11_t *ctx, float vref, float voltage );
  • dac11_set_specific_ch_voltage This function sets the output voltage of the specific channels depending on the vref value defined by the VCC SEL on-board jumper. The VREF and Voltage values can be either in Volts or Milivolts.
err_t dac11_set_specific_ch_voltage( dac11_t *ctx, uint8_t channel, float vref, float voltage );

Application Init

Initializes the driver and executes the Click default configuration which sets the WRM mode and disables all outputs.

void application_init ( void )
{
    log_cfg_t log_cfg;      /**< Logger config object. */
    dac11_cfg_t dac11_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 );
    Delay_ms ( 100 );
    log_info( &logger, " Application Init " );

    // Click initialization.

    dac11_cfg_setup( &dac11_cfg );
    DAC11_MAP_MIKROBUS( dac11_cfg, MIKROBUS_1 );
    err_t init_flag  = dac11_init( &dac11, &dac11_cfg );
    if ( SPI_MASTER_ERROR == init_flag )
    {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }

    dac11_default_cfg ( &dac11 );
    log_info( &logger, " Application Task " );
}

Application Task

Changes the output voltage of all channels every 2 seconds and logs the voltage value on the USB UART. It will go through the entire voltage range taking into account the number of steps which is defined below.

void application_task ( void )
{
    float step = REFERENCE_VOLTAGE / NUMBER_OF_STEPS;
    float output_voltage = step;
    uint8_t cnt = 0;
    while ( cnt < NUMBER_OF_STEPS )
    {
        dac11_set_all_ch_voltage ( &dac11, REFERENCE_VOLTAGE, output_voltage );
        log_printf( &logger, " All channels output voltage set to %.2f V\r\n", output_voltage );
        
        output_voltage += step;
        cnt++;
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }
}

Note

Measure the voltage at VCC_SEL jumper and adjust the reference voltage value below for better accuracy.

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.