CIPAD Leçon 48 3e partie: Créer des menus commandés par joystick.

Introduction

This tutorial will guide you through the process of creating joystick-controlled menus using Arduino. This functionality is useful for various projects where intuitive navigation is required, such as games or user interfaces. By the end of this tutorial, you will be able to implement a joystick menu system in your Arduino projects.

Step 1: Setting Up Your Arduino Environment

1. Gather Your Materials:

   • Arduino board (e.g., Arduino Uno)
   • Joystick module
   • LCD display (optional for visual feedback)
   • Wires and breadboard for connections

2. Install Necessary Libraries:

   • Ensure you have the latest Arduino IDE.
   • Install the necessary libraries for joystick and LCD handling. You can do this by navigating to Sketch > Include Library > Manage Libraries and searching for the libraries.

Step 2: Wiring the Joystick

1. Connect the Joystick:

   • VCC pin to 5V on the Arduino
   • GND pin to Ground on the Arduino
   • VRx pin to an analog pin (e.g., A0)
   • VRy pin to another analog pin (e.g., A1)
   • SW pin (if applicable) to a digital pin (e.g., D2)

2. Check Your Connections:

   • Double-check the wiring to ensure there are no loose connections.

Step 3: Writing the Code for Menu Navigation

1. Initialize Libraries: Begin your code by including the necessary libraries:

   #include <Joystick.h> // Replace with your joystick library
   #include <LiquidCrystal.h> // Replace with your LCD library if using
   

2. Define Pin Connections: Set up pin definitions for the joystick and any display you are using:

   const int joyX = A0; // Joystick X-axis
   const int joyY = A1; // Joystick Y-axis
   const int buttonPin = 2; // Button pin
   

3. Setup Function: Initialize the joystick and display in the setup() function:

   void setup() {
       pinMode(buttonPin, INPUT_PULLUP);
       // Initialize your LCD here if using
   }
   

4. Loop Function for Menu Navigation: In the loop() function, read joystick values and implement menu logic:

   void loop() {
       int xReading = analogRead(joyX);
       int yReading = analogRead(joyY);
       
       if (yReading < threshold) {
           // Move up in menu
       } else if (yReading > threshold) {
           // Move down in menu
       }
       
       if (digitalRead(buttonPin) == LOW) {
           // Select menu option
       }
       
       // Update display with current menu option
   }
   

5. Run and Test the Code:

   • Upload the code to your Arduino and test the joystick functionality to ensure it navigates through the menu as expected.

Step 4: Creating Special Characters for LCD (Optional)

1. Use the Character Creator Link:

   • Visit the provided link to create custom characters for your LCD display: LCD Character Creator.

2. Implement Custom Characters in Code:

   • Use the generated code to define your custom characters in your Arduino sketch.

Conclusion

In this tutorial, you learned how to create a joystick-controlled menu using Arduino. You set up your environment, wired the joystick, wrote the necessary code for navigation, and optionally created custom characters for display. As a next step, consider expanding your menu with additional features or integrating it into a larger project. Happy coding!