Library Description

Library contains function for reading single ADC conversion data Library contains function for reading single ADC conversion converted to miliVolts Library contains function for scaling ADC data to value in desired range Library contains constant for device address

Key functions:

• uint16_t pir_getAdc( void ) - reads single ADC conversion data
• float pir_getMiliVolt( uint16_t refVoltage ) - reads 12bit ADC data and convets it to miliVolts
• float pir_scaleResults( uint16_t inVal, uint16_t outMin, uint16_t outMax ) - scales ADC conversion data (inVal) to desired range (from outMin to outMax) and returns scaled data (outVal)

Examples description

The application is composed of three sections :

• System Initialization - Initializes LOG, I2C and AN pin as input
• Application Initialization - Initializes I2C driver
• Application Task - Reads ADC data, converts it to miliVolts and logs scaled value in miliVolts

void applicationTask( )
{
    adcVal = pir_getAdc( );
    mapOut = pir_scaleResults( adcVal, 0, 3303 );
    FloatToStr(mapOut, text);
    mikrobus_logWrite(" Voltage: ", _LOG_TEXT);
    mikrobus_logWrite(text, _LOG_TEXT);
    mikrobus_logWrite(" miliVolts ", _LOG_LINE);
    Delay_ms(100);
}

Other mikroE Libraries used in the example:

• I2C
• UART
• Converisons

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.