Library Description

The library covers all the necessary functions to control the DAC 9 Click board™. This library holds functions that can be used to write data to the device in order to set up the device or set output voltage. Read function can be used with I2C communication exclusively.

Key functions:

• void dac9_soft_reset ( ); - The function is used to perform software reset.
• uint8_t dac9_set_gain ( uint16_t en_ref_div, uint16_t en_buff_gain ); - The function is used to set gain and internal voltage reference.
• uint8_t dac9_set_vout ( uint16_t vout_mv ); - The function is used set Vout ( mV ) by calculating input data and writing it to the DAC data register.

Examples description

The application is composed of three sections :

• System Initialization - Initializes I2C and SPI , sets CS pin as output and start to write log.
• Application Initialization - Initalizes SPI or I2C driver and applies default settings.
• Application Task - Demonstrates use of DAC 9 Click board™ by changeing output values every two seconds.

void application_task ( )
{  
    uint16_t n_cnt;
    
    for ( n_cnt = 0; n_cnt <= res; n_cnt += 500 )
    {
        WordToStr(n_cnt, log_txt );
        mikrobus_logWrite( "Output Voltage : ", _LOG_TEXT );
        Ltrim(log_txt);
        mikrobus_logWrite( log_txt, _LOG_TEXT );
        mikrobus_logWrite( "mV", _LOG_LINE );
        dac9_set_vout(  n_cnt );
        Delay_ms( 2000 );
    }
}

Other mikroE Libraries used in the example:

• I2C
• 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.