DAC 9 Click

DAC 9 Click is a compact add-on board that contains a fully-featured, highly accurate digital-to-analog converter. This board features the DAC80501, a 16-bit voltage-output digital-to-analog converter with precision internal reference from Texas Instruments. It supports both I2C and SPI serial interface and offers a linearity of < 1 LSB. It also includes a 2.5V internal reference, giving full-scale output voltage ranges of 1.25V, 2.5V, or 5V, incorporate a Power-On Reset function, consume a low current of 1mA, and include a Power-Down feature that reduces current consumption to typically 15μA at 5V.

Click Product page

Click library

• Author : Stefan Ilic
• Date : Aug 2021.
• Type : I2C/SPI type

Software Support

We provide a library for the DAC9 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 DAC9 Click driver.

Standard key functions :

• dac9_cfg_setup Config Object Initialization function.

  void dac9_cfg_setup ( dac9_cfg_t *cfg );

• dac9_init Initialization function.

  err_t dac9_init ( dac9_t *ctx, dac9_cfg_t *cfg );

Example key functions :

• dac9_set_config Set config function.

  err_t dac9_set_config ( dac9_t *ctx, uint16_t en_ref_pwdwn, uint16_t en_dac_pwdwn );

• dac9_set_gain Set gain function.

  err_t dac9_set_gain ( dac9_t *ctx, uint16_t en_ref_div, uint16_t en_buff_gain );

• dac9_set_vout Set Vout function.

  err_t dac9_set_vout ( dac9_t *ctx, uint16_t vout_mv );

Example Description

This is an example that demonstrates the use of the DAC 9 Click board.

The demo application is composed of two sections :

Application Init

Initalizes SPI or I2C driver and applies default settings.

void application_init ( void ) {
    log_cfg_t log_cfg;  /**< Logger config object. */
    dac9_cfg_t dac9_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.
    dac9_cfg_setup( &dac9_cfg );
    DAC9_MAP_MIKROBUS( dac9_cfg, MIKROBUS_1 );
    err_t init_flag  = dac9_init( &dac9, &dac9_cfg );
    if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) ) {
        log_error( &logger, " Application Init Error. " );
        log_info( &logger, " Please, run program again... " );

        for ( ; ; );
    }
    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "     Soft reset      \r\n" );
    dac9_soft_reset( &dac9 );
    Delay_ms ( 200 );

    log_printf( &logger, "---------------------\r\n" );
    log_printf( &logger, "  Vref divided by 2  \r\n" );
    log_printf( &logger, "  Set DAC gain of 2  \r\n" );
    dac9_set_gain( &dac9, DAC9_GAIN_REF_DIV_2, DAC9_GAIN_BUFF_GAIN_2 );
    Delay_ms ( 100 );

    log_printf( &logger, "---------------------\r\n" );
    log_info( &logger, " Application Task " );
}

Application Task

Demonstrates use of DAC 9 Click board by changeing output values every two seconds.

void application_task ( void ) {
    uint16_t n_cnt;
    for ( n_cnt = 0; n_cnt <= res; n_cnt += 500 ) {
        log_printf( &logger, "Output Voltage : %d mV\r\n", ( uint16_t ) n_cnt );
        dac9_set_vout( &dac9, n_cnt );
        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.DAC9

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.