This is the development sandbox for the DRV425EVM and its magnetic sensing.
Dependencies: mbed
Repository for the 2015 OhmBoyZ Capstone group.
main.cpp@2:a17facee23c1, 2015-11-17 (annotated)
- Committer:
- Krabby127
- Date:
- Tue Nov 17 17:56:50 2015 +0000
- Revision:
- 2:a17facee23c1
- Parent:
- 1:d901038c4bd2
- Child:
- 3:7285d6ff672b
TEST
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Krabby127 | 0:cbee968c2ec3 | 1 | #include "mbed.h" |
Krabby127 | 0:cbee968c2ec3 | 2 | #include <math.h> |
Krabby127 | 0:cbee968c2ec3 | 3 | |
Krabby127 | 0:cbee968c2ec3 | 4 | AnalogIn analog_value(A0); |
Krabby127 | 0:cbee968c2ec3 | 5 | |
Krabby127 | 0:cbee968c2ec3 | 6 | DigitalOut led(LED1); |
Krabby127 | 0:cbee968c2ec3 | 7 | |
Krabby127 | 0:cbee968c2ec3 | 8 | int main() { |
Krabby127 | 0:cbee968c2ec3 | 9 | float meas; |
Krabby127 | 0:cbee968c2ec3 | 10 | float b; |
Krabby127 | 0:cbee968c2ec3 | 11 | printf("\nAnalogIn example\n"); |
Krabby127 | 0:cbee968c2ec3 | 12 | while(1) { |
Krabby127 | 0:cbee968c2ec3 | 13 | meas = analog_value.read(); // Converts and read the analog input value (value from 0.0 to 1.0) |
Krabby127 | 0:cbee968c2ec3 | 14 | meas = meas * 3300; // Change the value to be in the 0 to 3300 range (currently to mV) |
Krabby127 | 1:d901038c4bd2 | 15 | printf("meas = %fmV\n\r",meas); // Print out raw measurement in terms of mV |
Krabby127 | 1:d901038c4bd2 | 16 | b=meas/(4.0*12.2*100.0); // Based on equation 1 |
Krabby127 | 1:d901038c4bd2 | 17 | printf("b = %f Gauss\n\r",b); // Print out b field measure in Gauss |
Krabby127 | 0:cbee968c2ec3 | 18 | printf("B = %fuT\n\r", b*100.0); // Output B field in micro-Tesla |
Krabby127 | 1:d901038c4bd2 | 19 | if (meas > 2000) { // If the value is greater than 2V then switch the LED on |
Krabby127 | 1:d901038c4bd2 | 20 | // greater than 410 microGauss [40 mT] |
Krabby127 | 0:cbee968c2ec3 | 21 | led = 1; |
Krabby127 | 0:cbee968c2ec3 | 22 | } |
Krabby127 | 0:cbee968c2ec3 | 23 | else { |
Krabby127 | 0:cbee968c2ec3 | 24 | led = 0; |
Krabby127 | 0:cbee968c2ec3 | 25 | } |
Krabby127 | 1:d901038c4bd2 | 26 | wait(1.0); // wait 1 second |
Krabby127 | 0:cbee968c2ec3 | 27 | } |
Krabby127 | 0:cbee968c2ec3 | 28 | } |