DAC 19 Click

DAC 19 Click is a compact add-on board designed for high-performance voltage-output applications. This board features the DAC53701-Q1, a 10-bit automotive-grade DAC from Texas Instruments, offering smart functionality through force-sense output, GPI function trigger, PWM output, and integrated nonvolatile memory (NVM). The board supports an internal or power supply reference, provides a full-scale output range, and communicates efficiently with microcontrollers using an I2C interface with up to 1MHz clock speed.

Click Product page

Click library

• Author : Stefan Filipovic
• Date : Sep 2024.
• Type : I2C type

Software Support

We provide a library for the DAC 19 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 19 Click driver.

Standard key functions :

• dac19_cfg_setup Config Object Initialization function.

  void dac19_cfg_setup ( dac19_cfg_t *cfg );

• dac19_init Initialization function.

  err_t dac19_init ( dac19_t *ctx, dac19_cfg_t *cfg );

• dac19_default_cfg Click Default Configuration function.

  err_t dac19_default_cfg ( dac19_t *ctx );

Example key functions :

• dac19_set_voltage This function sets the output voltage depending on the vref value defined by the VCC SEL on-board jumper. VREF and Voltage values can be either in Volts or Milivolts.

  err_t dac19_set_voltage ( dac19_t *ctx, uint16_t vref_mv, uint16_t voltage_mv );

• dac19_set_value This function sets the DAC DATA register to a desired value.

  err_t dac19_set_value ( dac19_t *ctx, uint16_t data_in );

• dac19_set_voltage_int_vref This function sets the output voltage with the internal reference enabled.

  err_t dac19_set_voltage_int_vref ( dac19_t *ctx, uint16_t voltage_mv );

Example Description

This example demonstrates the use of DAC 19 Click board by changing the output voltage level.

The demo application is composed of two sections :

Application Init

Initializes the driver, checks the communication by reading and verifying the device ID, and enables the DAC output.

void application_init ( void )
{
    log_cfg_t log_cfg;  /**< Logger config object. */
    dac19_cfg_t dac19_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.
    dac19_cfg_setup( &dac19_cfg );
    DAC19_MAP_MIKROBUS( dac19_cfg, MIKROBUS_1 );
    if ( I2C_MASTER_ERROR == dac19_init( &dac19, &dac19_cfg ) ) 
    {
        log_error( &logger, " Communication init." );
        for ( ; ; );
    }

    if ( DAC19_ERROR == dac19_default_cfg ( &dac19 ) )
    {
        log_error( &logger, " Default configuration." );
        for ( ; ; );
    }

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

Application Task

Changes the output voltage every 2 seconds and logs the voltage value on the USB UART. It will go through the entire voltage range for the step number defined below.

void application_task ( void )
{
    uint16_t step = REFERENCE_VOLTAGE_MV / NUMBER_OF_STEPS;
    uint16_t output_voltage = step;
    for ( uint8_t cnt = 0; cnt < NUMBER_OF_STEPS; cnt++ )
    {
        if ( DAC19_OK == dac19_set_voltage ( &dac19, REFERENCE_VOLTAGE_MV, output_voltage ) )
        {
            log_printf( &logger, " VOUT: %u mV\r\n", output_voltage );
        }
        output_voltage += step;
        Delay_ms ( 1000 ); 
        Delay_ms ( 1000 );
    }
}

Note

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

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.DAC19

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.