Revision 12:b9d71de8733d, committed 2015-12-08

Comitter:

Krabby127

Date:

Tue Dec 08 02:10:55 2015 +0000

Parent:

11:791839389530

Child:

13:51e3bfd1f6c0

Commit message:

Updated for readability and equation corrections

Changed in this revision

--- a/main.cpp	Tue Dec 01 19:25:17 2015 +0000
+++ b/main.cpp	Tue Dec 08 02:10:55 2015 +0000
@@ -8,20 +8,20 @@
 int main() {
     float meas;
     float b;
-    printf("\nAnalogIn example\n");
+    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 = meas * 3300; // Change the value to be in the 0 to 3300 range (currently to mV)
-        printf("meas = %fmV\n\r",meas); // Print out raw measurement in terms of mV
-        b=(((meas-(3.3/2.0*1000))/1000)/(4.0*12.2*100.0)); // Based on equation 1 from DRV425EVM pdf
-        //VVOUT [V] = B × G × RSHUNT × GAMP = B [mT] × 12.2 mA/mT × RSHUNT [Ω] × 4 [V/V]
+        meas = meas * 3.3; // Change the value to be in the 0 to 3.3 range (currently to mV)
+        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
+        //VVOUT [V] = B × G × RSHUNT × GAMP = B [uT] × 12.2 mA/mT × RSHUNT [Ω] × 4 [V/V]
         //VVOUT is with reference to REFIN
-        //0 Tesla is VDD/2
+        // 0 Tesla is VDD/2
         // 12.2 mA/mT
-        printf("b = %f Gauss\n\r",b); // Print out b field measure in milliTesla
-        printf("B = %fuT\n\r", b*100.0); // Output B field in micro-Tesla
-        if (meas > 2000) { // If the value is greater than 2V then switch the LED on
-          // greater than 410 microGauss [40 mT]
+        printf("b = %fuT\n\r",b); // Print out b field measure in micro-Tesla
+        printf("b = %fuT\n\r", b/100.0); // 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 {