dac3

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DAC 3 Click

DAC 3 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 : MikroE Team
• Date : May 2020.
• Type : I2C type

Software Support

Example Description

This example showcases how to initialize, configure and use the DAC 3 Click module. The Click performs digital to analog conversion and the output voltage can be read on the output termi- nal using a multimeter. An oscilloscope is required to read the analog signal.

Example Libraries

• MikroSDK.Board
• MikroSDK.Log
• Click.DAC3

Example Key Functions

• dac3_cfg_setup Config Object Initialization function.

void dac3_cfg_setup ( dac3_cfg_t *cfg );

• dac3_init Initialization function.

err_t dac3_init ( dac3_t *ctx, dac3_cfg_t *cfg );

• dac3_default_cfg Click Default Configuration function.

void dac3_default_cfg ( dac3_t *ctx );

• dac3_write_all_mem This function configures the Click module.

void dac3_write_all_mem ( dac3_t *ctx, uint16_t value );

• dac3_send_command This function sends a command to the Click module using SPI communication.

void dac3_send_command ( dac3_t *ctx, uint8_t cmd );

• dac3_set_out_voltage This function sets the output voltage on the Click module terminal.

void dac3_set_out_voltage ( dac3_t *ctx, uint16_t output );

Application Init

This function configures and initializes the Click and logger modules. The write_all_mem(...) function configures DAC settings.

void application_init ( void )
{
    log_cfg_t log_cfg;
    dac3_cfg_t cfg;

    /** 
     * 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.

    dac3_cfg_setup( &cfg );
    DAC3_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    dac3_init( &dac3, &cfg );

    dac3.dac_cfg.vrl = 0;
    dac3.dac_cfg.power = 0;
    dac3.dac_cfg.gain = 0;

    dac3_write_all_mem( &dac3, 0 );
    Delay_100ms( );
}

Application Task

This function resets and wakes up the Click module and then changes the output voltage on the output terminal a few times in a loop with a 5 second delay. It does so every 1 second.

void application_task ( void )
{
    uint8_t cnt;
    uint32_t output_value;

    output_value = 500;

    dac3_send_command( &dac3, DAC3_RESET );
    Delay_100ms( );

    dac3_send_command( &dac3, DAC3_WAKE_UP );
    Delay_100ms( );

    for ( cnt = 1; cnt < 9; cnt ++ )
    {
        dac3_set_out_voltage( &dac3, output_value * cnt );

        log_printf( &logger, " .current DAC value: %d\r\n", output_value * cnt );
        log_printf( &logger, " .output voltage: %d mV\r\n", ( ( output_value * cnt ) * 79 ) / 64 );
        log_printf( &logger, "-------------------------------\r\n" );

        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
        Delay_ms ( 1000 );
    }

    log_printf( &logger, "###############################\r\n" );
    Delay_1sec( );
}

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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