MSP-EXP432P401R LaunchPad and MAG3110 3D magnetic sensor example
In this example we show how to connect a MAG3110 3D magnetic sensor to a MSP-EXP432P401R LaunchPad, the example will use the Energia IDE.
I used a MAG3110 module in this example, which you can see below
Connection
Here is a picture of the launchpad so you can see what pins we are referring to below in the table
Module Connection | MSP432 Connection |
SDA | J1-10 SDA |
SCL | J1-9 SCL |
Gnd | J3-22 Gnd |
Vcc | J1-1 3.3v |
Code
[codesyntax lang=”cpp”]
#include<Wire.h> // MAG3110 I2C address is 0x0E(14) #define Addr 0x0E void setup() { // Initialise I2C communication as MASTER Wire.begin(); // Initialise serial communication, set baud rate = 9600 Serial.begin(9600); // Start I2C Transmission Wire.beginTransmission(Addr); // Select control register-1 Wire.write(0x10); // Set active mode enabled Wire.write(0x01); // Stop I2C Transmission Wire.endTransmission(); delay(300); } void loop() { unsigned int data[6]; // Start I2C Transmission Wire.beginTransmission(Addr); // Select data register Wire.write(0x01); // Stop I2C Transmission Wire.endTransmission(); // Request 6 bytes of data Wire.requestFrom(Addr, 6); // Read 6 bytes of data // xMag lsb, xMag msb, yMag lsb, y Mag msb, zMag lsb, zMag msb if(Wire.available() == 6) { data[0] = Wire.read(); data[1] = Wire.read(); data[2] = Wire.read(); data[3] = Wire.read(); data[4] = Wire.read(); data[5] = Wire.read(); } // Convert the data int xMag = ((data[1] * 256) + data[0]); int yMag = ((data[3] * 256) + data[2]); int zMag = ((data[5] * 256) + data[4]); // Output data to serial monitor Serial.print("Magnetic field in X Axis : "); Serial.println(xMag); Serial.print("Magnetic field in Y Axis : "); Serial.println(yMag); Serial.print("Magnetic field in Z Axis : "); Serial.println(zMag); delay(1000); }
[/codesyntax]
Output
Open the serial monitor and you should see something like this
Magnetic field in X Axis : 31230
Magnetic field in Y Axis : 32261
Magnetic field in Z Axis : 17665
Magnetic field in X Axis : 30974
Magnetic field in Y Axis : 32517
Magnetic field in Z Axis : 13057
Magnetic field in X Axis : 31742
Magnetic field in Y Axis : 31237
Magnetic field in Z Axis : 18177
Magnetic field in X Axis : 31486
Magnetic field in Y Axis : 32005
Magnetic field in Z Axis : 18689
Links
GY-3110 MAG3110 Triple 3 Axis Magnetometer Breakout Electronic Compass Sensor Module For Arduino