LSM303 on POLOLU library

[StudiZaigo]

I am JA7FKF Satoh.
Thank you for providing a great sketch.

Now I am trying to make an AZ / EL rotator. LSM303 is used to detect AZ / EL.
The library was specified by FEATURE_AZ_POSITION_POLOLU_LSM303.

I read the source because the AZ displayed on the LED is a little strange.

The original source is as follows.

---

void read_azimuth(byte force_read){
..............
#ifdef FEATURE_AZ_POSITION_POLOLU_LSM303
..............
float heading = compass.heading();

  //float heading = atan2(lsm.magData.y, lsm.magData.x);
  //  heading += declinationAngle; 
  // Correct for when signs are reversed.
  /*
  if (heading < 0) heading += 2 * PI;
  if (heading > 2 * PI) heading -= 2 * PI;
  raw_azimuth = (heading * RAD_TO_DEG) * HEADING_MULTIPLIER; // radians to degree

---

The unit of the return value of POLOLU's heading function is a degree, so I thought it was necessary to modify the source.

My modifications are as follows.

---

  float heading = compass.heading();

  //float heading = atan2(lsm.magData.y, lsm.magData.x);
  // heading += declinationAngle();     　
  // Correct for when signs are reversed.

#ifdef POLOLU_LSM_303_DECLINATION_ANGLE // JA7FKF
heading += (POLOLU_LSM_303_DECLINATION_ANGLE); // JA7FKF
#endif // POLOLU_LSM_303_DECLINATION_ANGLE // JA7FKF
#ifdef POLOLU_LSM_303_CHANGE_AXIS // JA7FKF
heading += (POLOLU_LSM_303_CHANGE_AXIS); // JA7FKF
#endif // POLOLU_LSM_303_CHANGE_AXIS // JA7FKF
// if (heading < 0) heading += 2 * PI; // JA7FKF
// if (heading > 2 * PI) heading -= 2 * PI; // JA7FKF
while (heading < 0) heading += 360; // JA7FKF
while (heading > 359.99) heading -= 360; // JA7FKF
raw_azimuth = (heading * RAD_TO_DEG) * HEADING_MULTIPLIER; // radians to degree

Incidentally, we also included the conversion of declination and AXIS.
The declination and AXIS values were set in Settings.h.

At a minimum, it is suggested that the source correct the difference
between radians and degree.

Thank you!!