dac7

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DAC 7 click

DAC 7 click carries the AD5624R 12-bit buffered Digital-to-Analog Converter that converts digital value to the corresponding voltage level using external voltage reference.

click Product page

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Click library

• Author : Mihajlo Djordjevic
• Date : Jan 2020.
• Type : SPI type

Software Support

We provide a library for the Dac7 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Dac7 Click driver.

Standard key functions :

• Config Object Initialization function.

void dac7_cfg_setup ( dac7_cfg_t *cfg );

• Initialization function.

DAC7_RETVAL dac7_init ( dac7_t *ctx, dac7_cfg_t *cfg );

• Click Default Configuration function.

void dac7_default_cfg ( dac7_t *ctx );

Example key functions :

• This function set software reset of selected channel of AD5624R Quad, 12-bit nanoDACs on DAC 7 Click board.

DAC7_RETVAL_T dac7_sw_reset ( dac7_t *ctx );

• This function set power mode of selected channel of AD5624R Quad, 12-bit nanoDACs on DAC 7 Click board.

DAC7_RETVAL_T dac7_set_power ( dac7_t *ctx, uint8_t pwr_en, uint8_t sel_ch );

• This function set 12-bit value of 3-bit command definition to the target 3-bit address command of AD5624R Quad, 12-bit nanoDACs on DAC 7 Click board.

DAC7_RETVAL_T dac7_set_ch_voltage ( dac7_t *ctx, uint8_t addr_ch, uint16_t vol_val, uint16_t v_ref_mv );

Examples Description

DAC 7 click carries the AD5624R 12-bit buffered Digital-to-Analog Converter that converts digital value to the corresponding voltage level using external voltage reference.

The demo application is composed of two sections :

Application Init

Application Init performs Logger and Click initialization.

void application_init ( void )
{
    log_cfg_t log_cfg;
    dac7_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 ----" );
    Delay_ms ( 100 );

    //  Click initialization.

    dac7_cfg_setup( &cfg );
    DAC7_MAP_MIKROBUS( cfg, MIKROBUS_1 );
    dac7_init( &dac7, &cfg );
    
    log_printf( &logger, "--------------------------\r\n\n" );
    log_printf( &logger, " ------  DAC 7 Click  ------\r\n" );
    log_printf( &logger, "--------------------------\r\n\n" );
    Delay_ms ( 1000 );
    
    v_ref_sel = DAC7_VREF_5000mV;

    if ( dac7_sw_reset( &dac7 ) == DAC7_SUCCESS )
    {
        log_printf( &logger, "   Software reset   \r\n" );
    }
    else
    {
        log_printf( &logger, "   ERROR   \r\n" );
        for ( ; ; );
    }
    
    Delay_ms( 500 );
    log_printf( &logger, "--------------------------\r\n\n" );

    
    if ( dac7_set_power( &dac7, DAC7_PWR_ON_ENABLE, DAC7_SELECT_CHANNEL_ALL ) == DAC7_SUCCESS )
    {
        log_printf( &logger, "   All channel Power On   \r\n" );
    }
    else
    {
        log_printf( &logger, "   ERROR   \r\n" );

        for ( ; ; );
    }

    Delay_ms( 500 );
    log_printf( &logger, "--------------------------\r\n\n" );
    log_printf( &logger, " -- Initialization  done. --\r\n" );
    log_printf( &logger, "--------------------------\r\n\n" );
    Delay_ms ( 1000 );
}
  

Application Task

In this example, we adjust the DAC output voltage from 1000 mV to 4000 mV for the channels, starting from channel A to channel D and then set the DAC output voltage to 5000 mV for all channels. Results are being sent to UART Terminal where you can track their changes. All data logs write on USB UART changes every 5 sec.

void application_task ( void )
{
    if ( dac7_set_ch_voltage ( &dac7, DAC7_ADDRESS_CHANNEL_A, 1000, v_ref_sel ) == DAC7_SUCCESS )
    {
        log_printf( &logger, "  Channel A : 1000 mV  \r\n" );
    }
    else
    {
        log_printf( &logger, "   ERROR   \r\n" );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    log_printf( &logger, "--------------------------\r\n\n" );
    
    if ( dac7_set_ch_voltage ( &dac7, DAC7_ADDRESS_CHANNEL_B, 2000, v_ref_sel ) == DAC7_SUCCESS )
    {
        log_printf( &logger, "  Channel B : 2000 mV  \r\n" );
    }
    else
    {
        log_printf( &logger, "   ERROR   \r\n" );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    log_printf( &logger, "--------------------------\r\n\n" );
    
    if ( dac7_set_ch_voltage ( &dac7, DAC7_ADDRESS_CHANNEL_C, 3000, v_ref_sel ) == DAC7_SUCCESS )
    {
        log_printf( &logger, "  Channel C : 3000 mV  \r\n" );
    }
    else
    {
        log_printf( &logger, "   ERROR   \r\n" );
        for ( ; ; );
    }
    
    Delay_ms( 5000 );
    log_printf( &logger, "--------------------------\r\n\n" );
    
    if ( dac7_set_ch_voltage ( &dac7, DAC7_ADDRESS_CHANNEL_D, 4000, v_ref_sel ) == DAC7_SUCCESS )
    {
        log_printf( &logger, "  Channel D : 4000 mV  \r\n" );
    }
    else
    {
        log_printf( &logger, "   ERROR   \r\n" );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    log_printf( &logger, "--------------------------\r\n\n" );

    if ( dac7_set_ch_voltage ( &dac7, DAC7_ADDRESS_CHANNEL_ALL, 5000, v_ref_sel ) == DAC7_SUCCESS )
    {
        log_printf( &logger, " All Channels: 5000 mV \r\n" );
    }
    else
    {
        log_printf( &logger, "   ERROR   \r\n" );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    log_printf( &logger, "--------------------------\r\n\n" );
} 

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

• MikroSDK.Board
• MikroSDK.Log
• Click.Dac7

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. The terminal available in all Mikroelektronika compilers, or any other terminal application of your choice, can be used to read the message.

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