Pololu-Senseur-QTR-Installer

Installer la bibliothèque

Si vous utiliser la version 1.6.2 ou plus récente du logiciel Arduino,vous pourrez utiliser le gestionnaire de bibliothèque pour installer la bibliothèque:

Dans Arduino IDE, ouvrez le menu "Croquis" et sélectionnez "Inclure une bibliothèque... | Gérer les bibliothèques...".

1. Cherchez après "QTRSensors".
2. Cliquez sur l'entrée "QTRSensors" affiché dans la liste.
3. Cliquez sur le bouton "Installer".

Installer à la main

Si vous ne disposez pas du gestionnaire de bibliothèque, vous pouvez l'installer manuellement.

If this does not work, you can manually install the library:

1. Download the latest release archive from GitHub and decompress it.
2. Rename the folder “qtr-sensors-arduino-xxxx” to “QTRSensors”.
3. Drag the “QTRSensors” folder into the “libraries” directory inside your Arduino sketchbook directory. You can view your sketchbook location by opening the “File” menu and selecting “Preferences” in the Arduino IDE. If there is not already a “libraries” folder in that location, you should make the folder yourself.
4. After installing the library, restart the Arduino IDE.

You should now be able to use these libraries in your sketches by selecting Sketch > Import Library > QTRSensors from your Arduino IDE (or simply type #include <QTRSensors.h> at the top of your sketch). Note that you might need to restart your Arduino IDE before it sees the new libraries.

Once this is done, you can create a QTRSensorsAnalog object for your QTR-xA sensors and a QTRSensorsRC object for your QTR-xRC sensors:

// create an object for three QTR-xA sensors on analog inputs 0, 2, and 6
QTRSensorsAnalog qtra((unsigned char[]) {0, 2, 6}, 3);
 
// create an object for four QTR-xRC sensors on digital pins 0 and 9, and on analog
// inputs 1 and 3 (which are being used as digital inputs 15 and 17 in this case)
QTRSensorsRC qtrrc((unsigned char[]) {0, 9, 15, 17}, 4);

This library takes care of the differences between the QTR-xA and QTR-xRC sensors internally, providing you with a common interface to both sensors. The only external difference is in the constructors, as you can see in the code sample above. The first argument to the QTRSensorsAnalog constructor is an array of analog input pins (0 – 7) while the first argument to the QTRSensorsRC constructor is an array of digital pins (0 – 19). Note that analog inputs 0 – 5 can be used as digital pins 14 – 19. For more details, see utilisation et notes.

The only other difference you might experience is in the time it takes to read the sensor values. The QTR-xRC sensors can all be read in parallel, but each requires the timing of a pulse that might take as long as 3 ms (you can specify how long the library should time this pulse before timing out and declaring the result full black). The QTR-xA sensors use the analog-to-digital converter (ADC) and hence must be read sequentially. Additionally, the analog results are produced by internally averaging a number of samples for each sensor (you can specify the number of samples to average) to decrease the effect of noise on the results.

Several example sketches are available to help you get started. To view the example sketches, open the Arduino IDE and navigate to:

File > Examples > QTRSensors

As a first step, we recommend using QTRARawValuesExample (for QTR-xA sensors) or QTRRCRawValuesExample (for the QTR-xRC sensors). These examples will simply print the raw readings from the sensors to the serial monitor, using 9600 baud. Once that is working, you might want to try one of the more advanced examples, QTRAExample or QTRRCExample, which incorporate calibration and also estimate the position of a line.

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Basé sur "Arduino Library for the Pololu QTR Reflectance Sensors" de Pololu (www.pololu.com/docs/0J19/1) - Traduit en Français par shop.mchobby.be CC-BY-SA pour la traduction
Toute copie doit contenir ce crédit, lien vers cette page et la section "crédit de traduction". Traduit avec l'autorisation expresse de Pololu (www.pololu.com)

Based on "Arduino Library for the Pololu QTR Reflectance Sensors" from Pololu (www.pololu.com/docs/0J19/1) - Translated to French by shop.mchobby.be CC-BY-SA for the translation
Copies must includes this credit, link to this page and the section "crédit de traduction" (translation credit). Translated with the Pololu's authorization (www.pololu.com)