hhmc5883l_example_ansifa.pde

Arduino学习笔记3_连接HMC5883L三轴电子罗盘传感器

#include <Wire.h>
#include <HMC5883L.h>
HMC5883L compass;
void setup()
{
  Serial.begin(9600);
  Wire.begin();
  compass = HMC5883L();
  compass.SetScale(1.3);
  compass.SetMeasurementMode(Measurement_Continuous);
}
void loop()
{
  MagnetometerRaw raw = compass.ReadRawAxis();
  MagnetometerScaled scaled = compass.ReadScaledAxis();
  float xHeading = atan2(scaled.YAxis, scaled.XAxis);
  float yHeading = atan2(scaled.ZAxis, scaled.XAxis);
  float zHeading = atan2(scaled.ZAxis, scaled.YAxis);
  if(xHeading < 0)    xHeading += 2*PI;
  if(xHeading > 2*PI)    xHeading -= 2*PI;
  if(yHeading < 0)    yHeading += 2*PI;
  if(yHeading > 2*PI)    yHeading -= 2*PI;
  if(zHeading < 0)    zHeading += 2*PI;
  if(zHeading > 2*PI)    zHeading -= 2*PI;
  float xDegrees = xHeading * 180/M_PI; 
  float yDegrees = yHeading * 180/M_PI; 
  float zDegrees = zHeading * 180/M_PI; 
  Serial.print(xDegrees);
  Serial.print(",");
  Serial.print(yDegrees);
  Serial.print(",");
  Serial.print(zDegrees);
  Serial.println(";");
  delay(100);
}