04-01 DACOutput

From Manuals

Revision as of 15:59, 17 September 2014

This example outputs 3 different values to the Digital to Analog Converter (DAC) every 2 seconds. It outputs 0.825V, 1.65V, and 2.475V. The DAC output is on pin A5 of J8.

/*Program Example 4.1: Three values of DAC are output in turn on Pin DAC0. Read the output on a Digital Volt Meter.
                                                                             */
#include "mbed.h"
AnalogOut Aout(DAC0);   //create an analog output on pin DAC0

int main()
{
    while(1) {
        Aout=0.25;           // 0.25*3.3V = 0.825V
        wait(2);
        Aout=0.5;            // 0.5*3.3V = 1.65V
        wait(2);
        Aout=0.75;           // 0.75*3.3V = 2.475V
        wait(2);
    }
}

The following image shows the circuit in action.