Myles Gibson / Mbed 2 deprecated Read_Magnetometer_MLX90393

This code will read the data from the X,Y and Z axis of the MLX90393 Magnetometer and display it on a serial monitor. Remember to check the solder links on the I2C lines on your Nucleo as this can interfere on certain boards.

Dependencies:   mbed

main.cpp

Committer:
Angath
Date:
2018-11-21
Revision:
0:61c51438425a

File content as of revision 0:61c51438425a:

#include "mbed.h"

int addr = 0x0C <<1; // 8bit I2C address

I2C i2c(PB_9 , PB_8);   //sda, scl

Serial pc(PA_2, PA_3); //Tx/Rx

int main()
{
    char config [4];
    char data[7] = {0};

    config[0] = 0x60;
    config[1] = 0x00;
    config[2] = 0x5C;
    config[3] = 0x00;

    i2c.write(addr, config, 4, false);

    i2c.read(addr, data, 1);

    config[0] = 0x60;
    config[1] = 0x02;
    config[2] = 0xB4;
    config[3] = 0x02;

    i2c.write(addr, config, 4, false);

    i2c.read(addr, data, 1);

    wait(0.25);

    while (1) {

        config[0] = 0x3E; // Single measurement mode, ZYX enabled

        i2c.write(addr, config, 1, false);
        i2c.read(addr, data, 1);

        wait(0.1);

        config[0] = 0x4E;

        i2c.write(addr, config, 1, false); // Read command, followed by ZYX bits set
        i2c.read(addr, data, 7);

        int xMag = ((data[1] * 256) + data[2]);
        int yMag = ((data[3] * 256) + data[4]);
        int zMag = ((data[5] * 256) + data[6]);

        printf("X Axis = %d \n", xMag);
        printf("Y Axis = %d \n", yMag);
        printf("Z Axis = %d \n", zMag);

        wait(5);
    }
}