Library Description

The library contains basic functions for working with Wheatstone click.

Key functions:

• float wheatstone_get_voltage ( uint16_t adc_value ) - Get Voltage
• void wheatstone_set_adc_vref ( float vref ) - Set ADC VREF
• void wheatstone_set_adc_resolution ( float res ) - Set ADC resolution

Examples description

The application is composed of three sections :

• System Initialization - Initializes the SPI driver init all necessary GPIO pins
• Application Initialization - Initializes driver init and ADC module init - sets the ADC resolution, vref and potentiometer
• Application Task - Reads the ADC value and converts to voltage on the AN pin
• Note: Set the ADC resolution and vref before programming

void application_task ( )
{
    char demo_text[ 50 ];
    float voltage;
    uint32_t adc_value = 0;
    
    adc_value = wheatstone_adc_read( );
    IntToStr( adc_value, demo_text );
    mikrobus_logWrite( "-- ADC value: ", _LOG_TEXT );
    mikrobus_logWrite( demo_text, _LOG_LINE );
    
    voltage = wheatstone_get_voltage( adc_value );

    FloatToStr( voltage, demo_text );
    mikrobus_logWrite( "-- Voltage: ", _LOG_TEXT );
    mikrobus_logWrite( demo_text, _LOG_TEXT );
    mikrobus_logWrite( "mV", _LOG_LINE );
    
    mikrobus_logWrite( "---------------------", _LOG_LINE );
    Delay_ms( 2000 );
}

Other mikroE Libraries used in the example:

• SPI Library
• ADC Library
• Conversions Library

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.