u can take an

//  input above 3.3V! Keep your input voltages below 3.3V 

to avoid damage!

    adc.setRange(_0_512V);

// getResult() returns a normalized floating point value r

epresenting the

//  current voltage of the passed channel. User is respons

ible for

//  logic to determine whether the value is at min or max.

    cout<<"Ch 0: "<<adc.getResult(0)<<endl;

    cout<<"Ch 1: "<<adc.getResult(1)<<endl;

    // getDiffResult() returns a normalized fp value represent

ing the 

    //  difference between two channels. Options are 

    //  0 ­ Ch0 ­ Ch1 

    //  1 ­ Ch0 ­ Ch3 

    //  2 ­ Ch1 ­ Ch3 

    //  3 ­ Ch2 ­ Ch3 

    cout<<"Ch 0 ­ ch 1: "<<adc.getDiffResult(0)<<endl;

    // If you want to do the math yourself, you can determine 

the current gain 

    //  setting by using the getScaler() command. 

    cout<<"Current scaler: "<<adc.getScaler()<<"V per bit"<<en

dl; 

// The current voltage is the scaler/1000 multiplied by th

e raw value. You

//  can get the raw ADC readings using the getRawResult() 

and

//  getRawDiffResult() functions.

    cout<<"Ch 0 raw: "<<adc.getRawResult(0)<<endl;

    cout<<"Ch 1 raw: "<<adc.getRawResult(1)<<endl;

    cout<<"Ch 0 ­ ch 1 raw: "<<adc.getRawDiffResult(0)<<endl;

    // If you want to get *really* crazy, you can always go lo

ok up the 

    //  datasheet and read and write the configuration registe

r directly. 

    cout<<"Config register: "<<hex<<adc.getConfigRegister()<<e

ndl; 

    // There's a "setConfigRegister()" function, too, which ex

pects an 

//  unsigned 16­bit integer. Just FYI.

return MRAA_SUCCESS;

} 

Resources and Going Further

Now that you have had a brief overview of the ADC Block, take a look at

some of these other tutorials. These tutorials cover programming, Block

stacking, and interfacing with the Intel Edison ecosystems.

Edison General Topics:

• General Guide to Sparkfun Blocks for Intel Edison

• Edison Getting Started Guide

• Loading Debian (Ubilinix) on the Edison

Block Specific Topics:

• ADC Block Git Repo

• ADC Block CPP Library Git Repo

Page 5 of 6