HMC5843 Digital Compass

Table of Contents

  1. Hello World!
  2. Library
  3. Reference

Note

This page has been moved to the Components section of the website. Please see http://developer.mbed.org/components/HMC5843-Digital-Compass/ .

HMC5843

The HMC5843 is a 3-axis digital compass with an I2C interface.

Hello World!

Import program
Hello_World_HMC5843 - main.cpp

00001 #include "HMC5843.h"
00002  
00003 HMC5843 compass(p28, p27);
00004 Serial pc(USBTX, USBRX);
00005 
00006 //Magnetics values x,y,z
00007 int readings[3];
00008 
00009 //ID Buffer
00010 char buffer[3];
00011 
00012  
00013 int main() {
00014 
00015      pc.printf("Starting HMC5843 test...%c%c",13,10);
00016      
00017      //ID should be H43
00018      compass.getAddress(buffer);
00019      pc.printf("Magnetic Compass  Id=%c%c%c \n\r",buffer[0],buffer[1],buffer[2]);
00020      
00021     //Continuous mode, , 10Hz measurement rate.
00022     // HMC5843_CONTINUOUS, HMC5843_10HZ_NORMAL HMC5843_1_0GA
00023      compass.setDefault();
00024      
00025      //Wait some time(Need at least 5ms)
00026      wait(.1);
00027      
00028         
00029      while(1){
00030     
00031     
00032         compass.readData(readings);
00033     
00034         pc.printf("Magnetic Values  Mx=%i, My=%i and Mz=%i %c%c",(int16_t)readings[0],(int16_t)readings[1],(int16_t)readings[2] ,13,10);
00035        
00036          wait(0.1);   
00037          
00038      
00039  
00040      }
00041  
00042 }
HMC6352 Signal Namembed pin
VccVout
GndGnd
SCLp27
SDAp28

Library

Import library
HMC5843 - HMC5843 Class Reference

Public Member Functions

HMC5843 (PinName sda, PinName scl)
Constructor.
void setSleepMode ()
Enter into sleep mode.
void setDefault ()
Set Device in Default Mode.
void getAddress (char *address)
Read the memory location on the device which contains the address.
void setOpMode (int mode, int ConfigA, int ConfigB)
Set the operation mode.
void write (int address, int data)
Write to on the device.
void readData (int *readings)
Get the output of all three axes.
int getMx ()
Get the output of X axis.
int getMy ()
Get the output of Y axis.
int getMz ()
Get the output of Z axis.
int getStatus (void)
Get the current operation mode.

Reference

All wikipages