Space Racer

1#include <LiquidCrystal.h>
2
3// Constants
4const int R_BUTTON = 3;
5const int L_BUTTON = 2;
6const int SPEAKER = 4;
7
8const int RS = 8;
9const int E = 9;
10const int DB4 = 10;
11const int DB5 = 11;
12const int DB6 = 12;
13const int DB7 = 13;
14
15LiquidCrystal lcd(RS, E, DB4, DB5, DB6, DB7);
16
17// Custom characters
18byte ship[8] = {
19  B00010,
20  B00110,
21  B01110,
22  B11111,
23  B01110,
24  B00110,
25  B00010,
26  B00000
27};
28
29byte asteroid[8] = {
30  B00110,
31  B01111,
32  B11101,
33  B11011,
34  B11111,
35  B01110,
36  B00100,
37  B00000
38};
39
40byte flameA[8] = {
41  B00000,
42  B00001,
43  B00011,
44  B00111,
45  B00011,
46  B00001,
47  B00000,
48  B00000
49};
50
51byte flameB[8] = {
52  B00000,
53  B11000,
54  B11100,
55  B11110,
56  B11100,
57  B11000,
58  B00000,
59  B00000
60};
61
62// Ship row: 0 = left, 1 = right
63int shipRow = 1;
64int lastShipRow = 1;
65
66// Asteroid
67int asteroidCol = 0;
68int asteroidRow = 0;
69
70void setup()
71{
72  Serial.begin(9400);
73  lcd.begin(16,2);
74
75  pinMode(L_BUTTON, INPUT_PULLUP);
76  pinMode(R_BUTTON, INPUT_PULLUP);
77
78  lcd.createChar(0, ship);
79  lcd.createChar(1, asteroid);
80  lcd.createChar(2, flameA);
81  lcd.createChar(3, flameB);
82
83  lcd.clear();
84
85  randomSeed(analogRead(A0));
86}
87
88void loop()
89{
90  // --- BUTTON INPUT ---
91  int rState = digitalRead(R_BUTTON);
92  int lState = digitalRead(L_BUTTON);
93
94  if (rState == LOW) shipRow = 1;
95  if (lState == LOW) shipRow = 0;
96
97  // --- ASTEROID LOGIC (LEFT → RIGHT) ---
98
99  // Respawn asteroid when it reaches ship area
100  if (asteroidCol >= 13) {
101    asteroidCol = 0;              
102    asteroidRow = random(0, 2);   
103  }
104
105  // Clear previous asteroid position
106  if (asteroidCol > 0) {
107    lcd.setCursor(asteroidCol - 1, asteroidRow);
108    lcd.write(' ');
109  }
110
111  // Draw asteroid
112  lcd.setCursor(asteroidCol, asteroidRow);
113  lcd.write(byte(1));
114
115  // Move asteroid RIGHT
116  asteroidCol++;
117
118  // Collision detection
119  if (asteroidCol == 13 && asteroidRow == shipRow) {
120    tone(SPEAKER, 400, 200);
121
122    
123  }
124  
125
126  // --- SHIP DRAWING ---
127
128  // Clear previous ship position (no wrap)
129  lcd.setCursor(12, lastShipRow);
130  lcd.write(' ');
131  lcd.write(' ');
132  lcd.write(' ');
133   lcd.write(' ');
134
135  
136
137  // Draw ship
138  lcd.setCursor(13, shipRow);
139  lcd.write(byte(0));
140
141  // Draw flame
142  lcd.setCursor(14, shipRow);
143  lcd.write(byte(2));
144  lcd.setCursor(15, shipRow);
145  lcd.write(byte(3));
146
147  lastShipRow = shipRow;
148
149  delay(80);
150}