Library Description

The library covers all the necessary functions to control DAC 7 click board. Library performs a standard SPI interface communication.

Key functions:

• DAC7_RETVAL_T dac7_set_ch_voltage ( uint8_t addr_ch, uint16_t vol_val, uint16_t v_ref_mv ) - Set the voltage values of the specified channel function.
• DAC7_RETVAL_T dac7_set_power ( uint8_t pwr_en, uint8_t sel_ch ) - Set power mode function.
• DAC7_RETVAL_T dac7_sw_reset ( void ) - Software reset function.

Examples description

The application is composed of three sections :

• System Initialization - Initializes SPI, set CS pin as output and start to write log.
• Application Initialization - Initialization driver enables - SPI, executes call software reset and all channels power on, also write log.
• Application Task - (code snippet) This is an example that demonstrates the use of the DAC 7 Click board. 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 set the DAC output voltage to 5000 mV for all channels. Results are being sent to the Usart Terminal where you can track their changes. All data logs write on USB uart changes every 5 sec.

void application_task ( )
{
    if ( dac7_set_ch_voltage ( DAC7_CHANNEL_A, 1000, v_ref_sel ) == DAC7_SUCCESS )
    {
        mikrobus_logWrite( "  Channel A : 1000 mV  ", _LOG_LINE );
    }
    else
    {
        mikrobus_logWrite( "        ERROR          ", _LOG_LINE );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    mikrobus_logWrite( "-----------------------", _LOG_LINE );

    if ( dac7_set_ch_voltage ( DAC7_CHANNEL_B, 2000, v_ref_sel ) == DAC7_SUCCESS )
    {
        mikrobus_logWrite( "  Channel B : 2000 mV  ", _LOG_LINE );
    }
    else
    {
        mikrobus_logWrite( "        ERROR          ", _LOG_LINE );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    mikrobus_logWrite( "-----------------------", _LOG_LINE );

    if ( dac7_set_ch_voltage ( DAC7_CHANNEL_C, 3000, v_ref_sel ) == DAC7_SUCCESS )
    {
        mikrobus_logWrite( "  Channel C : 3000 mV  ", _LOG_LINE );
    }
    else
    {
        mikrobus_logWrite( "        ERROR          ", _LOG_LINE );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    mikrobus_logWrite( "-----------------------", _LOG_LINE );

    if ( dac7_set_ch_voltage ( DAC7_CHANNEL_D, 4000, v_ref_sel ) == DAC7_SUCCESS )
    {
        mikrobus_logWrite( "  Channel D : 4000 mV  ", _LOG_LINE );
    }
    else
    {
        mikrobus_logWrite( "        ERROR          ", _LOG_LINE );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    mikrobus_logWrite( "-----------------------", _LOG_LINE );

    if ( dac7_set_ch_voltage ( DAC7_CHANNEL_ALL, 5000, v_ref_sel ) == DAC7_SUCCESS )
    {
        mikrobus_logWrite( " All Channels: 5000 mV ", _LOG_LINE );
    }
    else
    {
        mikrobus_logWrite( "        ERROR          ", _LOG_LINE );
        for ( ; ; );
    }

    Delay_ms( 5000 );
    mikrobus_logWrite( "-----------------------", _LOG_LINE );
}

Other mikroE Libraries used in the example:

• SPI
• UART

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.