Fighter Aircraft Like B-Scope Radar Display using Arduino

1/*
2Code by Harshdeep Singh
3*/
4#include <Wire.h>
5#include <Adafruit_GFX.h>
6#include <Adafruit_SSD1306.h>
7#include <Servo.h>
8
9// Define OLED width and height
10#define SCREEN_WIDTH 128
11#define SCREEN_HEIGHT 64
12
13// Define I2C address for the OLED
14#define OLED_RESET -1
15Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
16
17// Define pins for the ultrasonic sensor
18#define TRIG_PIN 9
19#define ECHO_PIN 10
20
21// Create a Servo object
22Servo myservo;
23
24void setup() {
25  // Initialize the servo motor
26  myservo.attach(6); // Attach the servo to pin 6
27
28  // Initialize the ultrasonic sensor pins
29  pinMode(TRIG_PIN, OUTPUT);
30  pinMode(ECHO_PIN, INPUT);
31
32  // Initialize the display
33  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
34    Serial.println(F("SSD1306 allocation failed"));
35    for (;;);
36  }
37
38  // Clear the buffer
39  display.clearDisplay();
40
41  // Draw the axes and labels
42  drawAxes();
43
44  // Initialize serial communication for debugging
45  Serial.begin(9600);
46}
47
48void loop() {
49  // Erase the previous scan
50  display.clearDisplay();
51
52  // Draw the axes and labels
53  drawAxes();
54
55  // Sweep the servo from 0 to 180 degrees in 30 degree increments
56  for (int angle = 0; angle <= 180; angle += 30) {
57    myservo.write(angle);
58    delay(500); // Wait for the servo to reach the position
59
60    // Get the distance from the ultrasonic sensor
61    long distance = getDistance();
62
63    // Plot the point on the OLED
64    plotPoint(angle, distance);
65
66    // Display the changes on the screen
67    display.display();
68  }
69}
70
71void drawAxes() {
72  display.setTextSize(1);
73  display.setTextColor(SSD1306_WHITE);
74
75  // Draw x-axis (0 to 180)
76  display.drawLine(20, 50, 120, 50, SSD1306_WHITE); // X-axis line
77
78  // Draw x-axis tick marks
79  for (int i = 30; i <= 180; i += 30) {
80    int x = map(i, 0, 180, 20, 120);
81    display.drawLine(x, 48, x, 52, SSD1306_WHITE);
82  }
83
84  // Label origin and maximum for x-axis
85  display.setCursor(15, 52);
86  display.print(F("0"));
87  display.setCursor(110, 52);
88  display.print(F("180"));
89
90  // Draw y-axis (0 to 50)
91  display.drawLine(20, 10, 20, 50, SSD1306_WHITE); // Y-axis line
92
93  // Draw y-axis tick marks
94  for (int i = 10; i <= 50; i += 10) {
95    int y = map(i, 0, 50, 50, 10);
96    display.drawLine(18, y, 22, y, SSD1306_WHITE);
97  }
98
99  // Label origin and maximum for y-axis
100  display.setCursor(2, 45);
101  display.print(F("0"));
102  display.setCursor(2, 5);
103  display.print(F("50"));
104}
105
106long getDistance() {
107  // Send a 10us pulse to trigger the ultrasonic sensor
108  digitalWrite(TRIG_PIN, LOW);
109  delayMicroseconds(2);
110  digitalWrite(TRIG_PIN, HIGH);
111  delayMicroseconds(10);
112  digitalWrite(TRIG_PIN, LOW);
113
114  // Measure the duration of the echo pulse
115  long duration = pulseIn(ECHO_PIN, HIGH);
116
117  // Calculate the distance (cm) based on the duration
118  long distance = duration * 0.034 / 2;
119
120  // Cap the distance at 50 cm
121  distance = min(distance, 50);
122
123  return distance;
124}
125
126void plotPoint(int angle, long distance) {
127  // Map angle to x-axis (0 to 180)
128  int x = map(angle, 0, 180, 20, 120);
129
130  // Map distance to y-axis (0 to 50)
131  int y = map(distance, 0, 50, 50, 10);
132
133  // Draw a small box at the specified coordinate
134  display.fillRect(x - 1, y - 1, 3, 3, SSD1306_WHITE);
135}