Hexiwear / Mbed OS Hexi_Accelero_Magneto_Example

Simple accelerometer and magnetometer program example for Hexiwear featuring UART

Dependencies:   FXOS8700

Fork of Hexi_Accelero_Magneto_Example by Hexiwear

This project demonstrates the use of the FXOS8700CQ combo Accelerometer and Magnetometer sensor embedded in hexiwear

Open a Hyperterminal tool on your computer and connect it to the "mbed Serial port (COMxx)" with Baud rate "9600bps"

Compile the project and copy the binary "Hexi_Accelero_Magneto_Example_HEXIWEAR.bin" in the DAP-LINK drive from your computer file explorer Press the K64F-RESET button on the docking station to start the program on your board

Message "Begin Data Acquisition from FXOS8700CQ sensor..." will appear in the Hyperterminal window
Then every 500ms the value of the Accelerometer and the Magnetometer for the Axis X, Y and Z plus their RMS value will be displayed in the Hyperterminal window and the LED will blink Green

main.cpp

Committer:
GregC
Date:
2016-08-15
Revision:
2:f9c24c129575
Parent:
1:6da908234299
Child:
3:9f60cb7455c4

File content as of revision 2:f9c24c129575:

#include "mbed.h"
#include "FXOS8700.h"

//  Check out the full featured example application for interfacing to the 
//  Accelerometer/Magnetometer device at the following URL
//  https://developer.mbed.org/users/trm/code/fxos8700cq_example/

DigitalOut led1(LED_GREEN);

// Initialize Serial port
Serial pc(USBTX, USBRX);

// Pin connections & address for Hexiwear
FXOS8700 accel(PTC11, PTC10);
FXOS8700 mag(PTC11, PTC10);

// main() runs in its own thread in the OS
// (note the calls to Thread::wait below for delays)
int main() {
    
    // Configure Accelerometer FXOS8700, Magnetometer FXOS8700
    accel.accel_config();
    mag.mag_config();

    float accel_data[3]; float accel_rms=0.0;
    float mag_data[3];   float mag_rms=0.0;

    printf("Begin Data Acquisition from FXOS8700 and FXAS21002....\r\n\r\n");
    wait(0.5);
    
    while (1) {
        led1 = !led1;
        // Example data printing
      
      accel.acquire_accel_data_g(accel_data);
      accel_rms = sqrt(((accel_data[0]*accel_data[0])+(accel_data[1]*accel_data[1])+(accel_data[2]*accel_data[2]))/3);
      printf("Accelerometer \tX-Axis %4.2f \tY-Axis %4.2f \tZ-Axis %4.2f \tRMS %4.2f\n\r",accel_data[0],accel_data[1],accel_data[2],accel_rms);
      wait(0.01);
      
      mag.acquire_mag_data_uT(mag_data);
      mag_rms = sqrt(((mag_data[0]*mag_data[0])+(mag_data[1]*mag_data[1])+(mag_data[2]*mag_data[2]))/3);
      printf("Magnetometer \tX-Axis %4.2f \tY-Axis %4.2f \tZ-Axis %4.2f \tRMS %4.2f\n\n\r",mag_data[0],mag_data[1],mag_data[2],mag_rms);
      wait(0.01);
        
        Thread::wait(500);
    }
}