File content as of revision 16:65b7b24fe260:

#include "mbed.h"
#include <math.h>
 
AnalogIn analog_value(A0);
 
DigitalOut led(LED1);

int main() {
    float meas;
    float b;
    printf("\n\rAnalogIn example\n\r");
    while(1) {
        meas = analog_value.read(); // Converts and read the analog input value (value from 0.0 to 1.0)
        meas *= 3.3; // Change the value to be in the 0 to 3.3 range (currently to V)
        printf("meas = %fmV\n\r",meas*1000); // Print out raw measurement in terms of mV
        b=(meas-(3.3/2.0))/(4.0*12.2*100.0); // Based on equation 1 from DRV425EVM pdf (in T)
        //VVOUT [V] = B × G × RSHUNT × GAMP = B [mT] × 12.2 mA/mT × RSHUNT [Ω] × 4 [V/V]
        //VVOUT is with reference to REFIN
        // 0 Tesla is VDD/2
        // 12.2 mA/mT
        printf("b = %fuT\n\r",b*1000000.0); // Print out b field measure in micro-Tesla
        printf("b = %f Gauss\n\r", b*1000); // Output B field in Gauss
        if (meas > 1.65) { // If the value is greater than 1.65V then switch the LED on
          // positive magnetic field
          led = 1;
        }
        else {
          led = 0;
        }
        wait(1); // wait 1 second
    }
}