Je possède une boussole à 3 axes hmc5883l que je désirerais faire fonctionner avec un arduino uno.
J'ai donc télécharger sa librairie sur ce site : http://www.loveelectronics.co.uk/Tutorials/8/
mais si je lance l'exemple présent dans la librairie (ou même d'autres exemples trouvés sur internet), j'ai toujours les erreurs suivantes :
HMC5883L_Example:1: error: stray '\' in program
HMC5883L_Example:4: error: variable or field 'Output' declared void
HMC5883L_Example:4: error: 'MagnetometerRaw' was not declared in this scope
HMC5883L_Example:4: error: 'MagnetometerScaled' was not declared in this scope
HMC5883L_Example:4: error: expected primary-expression before 'float'
HMC5883L_Example:4: error: expected primary-expression before 'float'
In file included from HMC5883L_Example.pde:20:
E:arduino-1.0.5-windows\arduino-1.0.5\libraries\Wire/Wire.h:30: error: expected constructor, destructor, or type conversion before 'class'
Je n'arrive donc pas à utiliser ma boussole et demande votre aide.
?/*
HMC5883L_Example.pde - Example sketch for integration with an HMC5883L triple axis magnetomerwe.
Copyright (C) 2011 Love Electronics (loveelectronics.co.uk)
This program is free software: you can redistribute it and/or modify
it under the terms of the version 3 GNU General Public License as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
// Reference the I2C Library
#include <Wire.h>
// Reference the HMC5883L Compass Library
#include <HMC5883L.h>
// Store our compass as a variable.
HMC5883L compass;
// Record any errors that may occur in the compass.
int error = 0;
// Out setup routine, here we will configure the microcontroller and compass.
void setup()
{
// Initialize the serial port.
Serial.begin(9600);
Serial.println("Starting the I2C interface.");
Wire.begin(); // Start the I2C interface.
Serial.println("Constructing new HMC5883L");
compass = HMC5883L(); // Construct a new HMC5883 compass.
Serial.println("Setting scale to +/- 1.3 Ga");
error = compass.SetScale(1.3); // Set the scale of the compass.
if(error != 0) // If there is an error, print it out.
Serial.println(compass.GetErrorText(error));
Serial.println("Setting measurement mode to continous.");
error = compass.SetMeasurementMode(Measurement_Continuous); // Set the measurement mode to Continuous
if(error != 0) // If there is an error, print it out.
Serial.println(compass.GetErrorText(error));
}
// Our main program loop.
void loop()
{
// Retrive the raw values from the compass (not scaled).
MagnetometerRaw raw = compass.ReadRawAxis();
// Retrived the scaled values from the compass (scaled to the configured scale).
MagnetometerScaled scaled = compass.ReadScaledAxis();
// Values are accessed like so:
int MilliGauss_OnThe_XAxis = scaled.XAxis;// (or YAxis, or ZAxis)
// Calculate heading when the magnetometer is level, then correct for signs of axis.
float heading = atan2(scaled.YAxis, scaled.XAxis);
// Once you have your heading, you must then add your 'Declination Angle', which is the 'Error' of the magnetic field in your location.
// Find yours here: http://www.magnetic-declination.com/
// Mine is: 2? 37' W, which is 2.617 Degrees, or (which we need) 0.0456752665 radians, I will use 0.0457
// If you cannot find your Declination, comment out these two lines, your compass will be slightly off.
float declinationAngle = 0.0457;
heading += declinationAngle;
// Correct for when signs are reversed.
if(heading < 0)
heading += 2*PI;
// Check for wrap due to addition of declination.
if(heading > 2*PI)
heading -= 2*PI;
// Convert radians to degrees for readability.
float headingDegrees = heading * 180/M_PI;
// Output the data via the serial port.
Output(raw, scaled, heading, headingDegrees);
// Normally we would delay the application by 66ms to allow the loop
// to run at 15Hz (default bandwidth for the HMC5883L).
// However since we have a long serial out (104ms at 9600) we will let
// it run at its natural speed.
// delay(66);
}
// Output the data down the serial port.
void Output(MagnetometerRaw raw, MagnetometerScaled scaled, float heading, float headingDegrees)
{
Serial.print("Raw:\t");
Serial.print(raw.XAxis);
Serial.print(" ");
Serial.print(raw.YAxis);
Serial.print(" ");
Serial.print(raw.ZAxis);
Serial.print(" \tScaled:\t");
Serial.print(scaled.XAxis);
Serial.print(" ");
Serial.print(scaled.YAxis);
Serial.print(" ");
Serial.print(scaled.ZAxis);
Serial.print(" \tHeading:\t");
Serial.print(heading);
Serial.print(" Radians \t");
Serial.print(headingDegrees);
Serial.println(" Degrees \t");
}
Je ne suis pas un expert en Arduino mais je code en VB.net et je pense que ce que je croyais des variables : MagnetometerRaw et MagnetometerScaled sont en fait des types mais ils ne sont probablement pas déclarés dans la LIB ou ils ne sont pas accessibles de cette façon.
Pas le temps de tester, mais un exemple en .pde, ça sent la librairie plus à jour pour les dernières versions de l'IDE.
Essaie peut-être avec ça (arduino/Libraries/HMC5883L at master · manifestinteractive/arduino · GitHub), l'exemple est un .ino, ça inspire plus confiance avec un IDE 1.05 comme le tien.
Ah merci la librairie que tu m'a envoyé 3Sigma fonctionne.
En fait j'ai comparé les 2 .cpp et anciennement pour inclure la librairie il fallait mettre #include <WProgram.h> alors que maintenant c'est #include <Arduino.h> et dans le .h il y avait #include <inttypes.h> #include "../Wire/Wire.h" à remplacer par #include <Arduino.h> #include <Wire.h>
Je vous remercie beaucoup de votre aide qui m'a été précieuse. Il reste plus qu'a tester si sa marche avec ma boussole!