Library Description

This library allows user to check the output voltage (VOUT) of the POT 3 Click board. User can get the output voltage as 12-bit digital value (ADC only), or as averaged value calculated to millivolts (ADC + calculations). The AD converted value can be read as one conversion sample, or as averaged value with desired number of conversions. For more details check documentation.

Key functions:

• uint16_t pot3_read_adc( void ) - This function reads the result of AD conversion.
• uint16_t pot3_get_vout( uint8_t vref_sel, uint16_t nSamples ) - This function returns VOUT value calculated to millivolts, with desired number of AD conversions included in calculations.

Examples description

The application is composed of three sections :

• System Initialization - Initializes peripherals and pins
• Application Initialization - Initializes SPI driver
• Application Task - (code snippet) - Reads VOUT value calculated to millivolts with 2000 conversions included in one measurement cycle. The reference voltage (VREF) of 2V is selected as default value for calculations. Results will be sent to the uart terminal every 10us * number of conversions

void applicationTask()
{
    voltage_mv = pot3_get_vout( _POT3_VREF_2V, 2000 );
    
    WordToStr( voltage_mv, text );
    mikrobus_logWrite( "** VOUT : ", _LOG_TEXT );
    mikrobus_logWrite( text, _LOG_TEXT );
    mikrobus_logWrite( " mV", _LOG_LINE );
    mikrobus_logWrite( "*******************************", _LOG_LINE );
}

Other mikroE Libraries used in the example:

• Conversions
• 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.