Arduino Leonardo Game Control Joystick

1#include "Mouse.h"
2
3const int xAxis = A0;
4const int yAxis = A1;
5const int buttonPin = 2;
6const int ledPin = 13;   // Built-in LED on the Leonardo
7
8int range = 12;
9int responseDelay = 5;
10int threshold = range / 4;
11int center = range / 2;
12
13bool lastButtonState = HIGH;
14
15void setup() {
16  pinMode(buttonPin, INPUT_PULLUP);
17  pinMode(ledPin, OUTPUT);
18  
19  Mouse.begin();
20}
21
22void loop() {
23  // 1. Move the cursor
24  int xReading = readAxis(xAxis);
25  int yReading = readAxis(yAxis);
26  Mouse.move(xReading, yReading, 0);
27
28  // 2. Read the button
29  bool currentButtonState = digitalRead(buttonPin);
30  
31  // DEBUG: Blink the LED when the button is pressed (LOW)
32  if (currentButtonState == LOW) {
33    digitalWrite(ledPin, HIGH);  // Turn LED ON
34  } else {
35    digitalWrite(ledPin, LOW);   // Turn LED OFF
36  }
37
38  // 3. Handle Left Click (Edge detection: only on the moment of press)
39  if (currentButtonState == LOW && lastButtonState == HIGH) {
40    Mouse.click(MOUSE_LEFT);  
41    delay(10);
42  }
43  
44  lastButtonState = currentButtonState;
45  delay(responseDelay);
46}
47
48int readAxis(int thisAxis) {
49  int reading = analogRead(thisAxis);           
50  reading = map(reading, 0, 1023, 0, range);    
51  int distance = reading - center;              
52  if (abs(distance) < threshold) {
53    distance = 0;
54  }
55  return distance; 
56}