/*********************************************************************

  Radar-Simulator

  Simuliert den Bildschirm eines alten Radargeräts mit einem kreisförmig drehenden Strahl für Modellschiffe.
  Läuft mit einem 0.96" OLED-Display mit 64x128 Pixeln (solle mit jedem 1306 kompatiblen Display funktionieren)
  und einem Arduino Pro Mini (5V, 16 MHz)

  Simulates the display of an vintage radar screen with rotating beam for a model ship. Uses 0.96" oled
  display with 64x128 pixel and an Arduino pro mini (5V, 16 MHz).

  CC-BY SA 2016 Kai Laborenz

*********************************************************************/

#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 64 // OLED display height, in pixels
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);

#define REFRESH 0 // refresh rate for radar screen (turn speed of line)

// 'Radarscreen' bitmap
const unsigned char backgroundMap [] PROGMEM = {
  0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x0c, 0x01, 0x20, 0x80, 0x00, 0x70, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x02, 0x1e, 0x00, 0x00, 0x0c, 0x02, 0x20, 0x80, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x1e, 0x9e, 0x00, 0x00, 0x0c, 0x02, 0x21, 0x00, 0x00, 0x04, 0x04, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x0f, 0xde, 0x00, 0x00, 0x0c, 0x02, 0x01, 0x00, 0x30, 0x04, 0x06, 0x00, 0x00, 0x00,
  0x00, 0x00, 0x1f, 0xce, 0x00, 0x1c, 0x08, 0x02, 0x02, 0x06, 0x18, 0x03, 0xfe, 0x00, 0x00, 0x00,
  0x00, 0x18, 0x0e, 0x0e, 0x00, 0x1e, 0x08, 0x24, 0x02, 0x07, 0x38, 0x00, 0x06, 0x00, 0x00, 0x00,
  0x00, 0x0c, 0x02, 0x0e, 0x00, 0x1c, 0x18, 0x34, 0x02, 0x00, 0x70, 0x00, 0x02, 0xc1, 0x00, 0x00,
  0x00, 0x06, 0x02, 0x1c, 0x00, 0x1c, 0x18, 0xe4, 0x04, 0x00, 0x30, 0x00, 0x00, 0x63, 0x38, 0x00,
  0x00, 0x02, 0x00, 0x08, 0x00, 0x04, 0x10, 0x04, 0x04, 0x00, 0x38, 0x00, 0x00, 0x30, 0x84, 0x00,
  0x00, 0x01, 0x00, 0x08, 0x00, 0x00, 0x10, 0x08, 0x24, 0x00, 0x10, 0x00, 0x00, 0x24, 0x04, 0x00,
  0x00, 0x01, 0x00, 0x0c, 0x00, 0x00, 0x30, 0x08, 0x04, 0x06, 0x00, 0x00, 0x00, 0x48, 0x04, 0x00,
  0x00, 0x01, 0x80, 0x06, 0x00, 0x00, 0x20, 0x08, 0x04, 0x0e, 0x00, 0x00, 0x06, 0x98, 0x00, 0x00,
  0x00, 0x00, 0x80, 0x02, 0x00, 0x00, 0x00, 0x18, 0x00, 0x1c, 0x00, 0x00, 0x01, 0x90, 0x02, 0x00,
  0x00, 0x00, 0x02, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x80, 0x02, 0x00,
  0x00, 0x00, 0x02, 0x06, 0x00, 0x00, 0x00, 0x00, 0x28, 0x00, 0xe0, 0x00, 0x0d, 0xa0, 0x00, 0x00,
  0x00, 0x00, 0x07, 0x9e, 0x00, 0x00, 0x00, 0x00, 0x38, 0x01, 0xc0, 0x01, 0x00, 0x60, 0x00, 0x00,
  0x00, 0x00, 0x0f, 0xdc, 0x03, 0x03, 0x00, 0x20, 0x00, 0x00, 0x00, 0x0d, 0x80, 0xd0, 0x01, 0x00,
  0x00, 0x00, 0x8f, 0xdc, 0x0f, 0x86, 0x00, 0x00, 0x00, 0x00, 0x21, 0x01, 0x80, 0x04, 0x1e, 0x00,
  0x00, 0x00, 0x0e, 0xc0, 0x09, 0x8c, 0x03, 0x40, 0x08, 0x00, 0x00, 0x08, 0x00, 0x22, 0x30, 0x00,
  0x00, 0x00, 0x01, 0xc0, 0x10, 0x88, 0x03, 0x40, 0x70, 0x01, 0xfd, 0x90, 0x04, 0x00, 0xb0, 0x00,
  0x00, 0x00, 0x00, 0x80, 0x00, 0x90, 0x0e, 0x80, 0xe0, 0x07, 0xf0, 0x00, 0x18, 0x00, 0x70, 0x00,
  0x00, 0x06, 0x00, 0x00, 0x09, 0xb0, 0x01, 0x0e, 0x40, 0x3c, 0x06, 0x00, 0x18, 0x02, 0x00, 0x00,
  0x00, 0x00, 0x00, 0x4e, 0x1f, 0x30, 0x00, 0x18, 0x00, 0x00, 0x04, 0x00, 0x00, 0x06, 0x00, 0x00,
  0x18, 0x00, 0x00, 0x7f, 0xf6, 0xb4, 0x38, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x1e, 0x00, 0x00,
  0x3e, 0x00, 0x00, 0x3e, 0xc7, 0xad, 0x79, 0x80, 0x40, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00,
  0x32, 0x18, 0x00, 0x00, 0xde, 0x1c, 0x39, 0x80, 0x00, 0x00, 0x80, 0x00, 0x00, 0x10, 0x00, 0x00,
  0x00, 0x10, 0x00, 0x01, 0x7c, 0x3c, 0x00, 0x00, 0x00, 0x01, 0xc0, 0x00, 0x00, 0x20, 0x60, 0x00,
  0x00, 0x30, 0x80, 0x07, 0x43, 0x00, 0x00, 0x00, 0x06, 0x03, 0xc0, 0x00, 0x00, 0x46, 0x60, 0x00,
  0x00, 0xe1, 0x81, 0xfd, 0x50, 0x00, 0x00, 0x00, 0x00, 0x01, 0xc0, 0x00, 0x00, 0x88, 0x80, 0x00,
  0x81, 0xe1, 0x87, 0x01, 0x8c, 0x00, 0x00, 0x00, 0x80, 0x00, 0x80, 0x00, 0x00, 0x01, 0x80, 0x00,
  0x73, 0xf1, 0x86, 0x08, 0x30, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0e, 0x60, 0x00,
  0x0e, 0x3d, 0x86, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00,
  0x0c, 0x18, 0x82, 0x30, 0x00, 0x00, 0x00, 0x20, 0x01, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x60, 0x00,
  0x08, 0x00, 0x46, 0x00, 0x00, 0x00, 0x00, 0x40, 0x01, 0x80, 0x20, 0x00, 0x00, 0x00, 0x60, 0x00,
  0x08, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x80, 0x02, 0x00, 0x70, 0x00, 0x03, 0x01, 0x40, 0x00,
  0x10, 0x00, 0x00, 0x00, 0x01, 0x10, 0x03, 0x00, 0x00, 0x08, 0xc0, 0x00, 0x02, 0x00, 0x80, 0x00,
  0x60, 0x03, 0x00, 0x40, 0x01, 0x18, 0x0c, 0x00, 0x00, 0x08, 0x40, 0x00, 0x06, 0x00, 0x40, 0x00,
  0x80, 0x01, 0x04, 0x00, 0x01, 0x08, 0x00, 0x00, 0x0c, 0x08, 0x00, 0x04, 0x04, 0x00, 0x20, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00, 0x0c, 0x04, 0x00, 0x0e, 0x00, 0x00, 0x20, 0x00,
  0x00, 0x00, 0x83, 0x08, 0x01, 0x18, 0x06, 0x00, 0x0c, 0x04, 0x00, 0x1c, 0x00, 0x00, 0x10, 0x00,
  0x00, 0x00, 0x10, 0x00, 0x01, 0x08, 0x0c, 0x00, 0x00, 0x32, 0x00, 0x08, 0x00, 0x60, 0x10, 0x00,
  0x00, 0x00, 0x60, 0x3c, 0x00, 0x00, 0x08, 0x00, 0x00, 0x63, 0xe0, 0x00, 0x00, 0x60, 0x00, 0x00,
  0x00, 0x00, 0x80, 0x00, 0x00, 0x10, 0x00, 0x60, 0x00, 0x00, 0x10, 0x00, 0x00, 0x64, 0x08, 0x00,
  0x00, 0x00, 0x04, 0x20, 0x04, 0x01, 0xf0, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x63, 0x06, 0x00,
  0x00, 0x00, 0x00, 0x00, 0x24, 0x00, 0x01, 0xc0, 0x00, 0x00, 0x08, 0xe0, 0x30, 0x63, 0x01, 0x00,
  0x00, 0x00, 0x00, 0x34, 0x00, 0x00, 0x00, 0x60, 0x03, 0x80, 0x07, 0xf0, 0x08, 0xf6, 0x00, 0x80,
  0x80, 0x00, 0x08, 0x0c, 0x11, 0xd0, 0x80, 0x00, 0x00, 0xc0, 0x00, 0x60, 0xe4, 0x01, 0x00, 0x00,
  0x00, 0x00, 0x06, 0x18, 0x19, 0x91, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, 0x87, 0x00, 0x40,
  0x00, 0x00, 0x3f, 0x18, 0x2c, 0x07, 0x00, 0x00, 0x33, 0x80, 0x00, 0x63, 0x64, 0x53, 0x8c, 0x40,
  0xc0, 0x00, 0x2f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x09, 0x80, 0x00, 0x70, 0xc2, 0x08, 0x1c, 0x40,
  0x40, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0xc0, 0x00, 0x20, 0xe2, 0x06, 0x38, 0x20,
  0x80, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x0c, 0x10, 0x10,
  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x08,
  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, 0x0c, 0x06, 0x01, 0x0e, 0x00, 0x04,
  0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x01, 0x0f, 0x00, 0x04,
  0x80, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0xc4, 0xc0, 0x04,
  0x80, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x80, 0x00, 0x30, 0x24, 0x40, 0x00,
  0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x3b, 0xf0, 0x12, 0x20, 0x02,
  0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x2e, 0x70, 0x0e, 0x20, 0x02,
  0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1c, 0x74, 0x30, 0x00, 0x20, 0x00,
  0x38, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x74, 0x30, 0x00, 0x10, 0x04,
  0x1e, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x32, 0x60, 0x00, 0x08, 0x04,
  0x0f, 0x98, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb7, 0xc0, 0x00, 0x38, 0x04,
  0x03, 0xb8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x62, 0xc0, 0x00, 0x78, 0xe4
};

#if (SCREEN_HEIGHT != 64)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif

void setup()   {
  Serial.begin(9600);

  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3D (for the 128x64)

  // Clear the buffer.
  display.clearDisplay();

  display.setRotation(1);
  testscrolltext();
  display.clearDisplay();
  display.setRotation(2);
}

void loop() {

  // simulated rotating beam by drawing a line from center to display border
  // end point for line is calculated in 4 phases for each side

  for (int x = 0; x < 127; x++) {
    display.drawLine(display.width() / 2, display.height() / 2, x - 1, 0, BLACK);
    display.drawLine(display.width() / 2, display.height() / 2, x, 0, WHITE);
    display.drawLine(display.width() / 2, display.height() / 2, x + 1, 0, WHITE);
    display.drawBitmap(0, 0,  backgroundMap, 128, 64, 1);
    drawScreen();
    delay(REFRESH);
  }
  for (int x = 0; x < 63; x++) {
    display.drawLine(display.width() / 2, display.height() / 2, 127, x - 1, BLACK);
    display.drawLine(display.width() / 2, display.height() / 2, 127, x, WHITE);
    display.drawLine(display.width() / 2, display.height() / 2, 127, x + 1, WHITE);
    display.drawBitmap(0, 0,  backgroundMap, 128, 64, 1);
    drawScreen();
    delay(REFRESH);
  }
  for (int x = 127; x > 0; x--) {
    display.drawLine(display.width() / 2, display.height() / 2, x + 1, 63, BLACK);
    display.drawLine(display.width() / 2, display.height() / 2, x + 2, 63, BLACK);
    display.drawLine(display.width() / 2, display.height() / 2, x, 63, WHITE);
    display.drawLine(display.width() / 2, display.height() / 2, x - 1, 63, WHITE);
    display.drawBitmap(0, 0,  backgroundMap, 128, 64, 1);
    drawScreen();
    delay(REFRESH);
  }
  for (int x = 63; x > 0; x--) {
    display.drawLine(display.width() / 2, display.height() / 2, 0, x + 1, BLACK);
    display.drawLine(display.width() / 2, display.height() / 2, 0, x, WHITE);
    display.drawLine(display.width() / 2, display.height() / 2, 0, x - 1, WHITE);
    display.drawBitmap(0, 0,  backgroundMap, 128, 64, 1);
    drawScreen();
    delay(REFRESH);
  }
  display.drawLine(display.width() / 2, display.height() / 2, 0, 1, BLACK); // needed to get rid of some artefact lines
  display.drawLine(display.width() / 2, display.height() / 2, 1, 1, BLACK);
}

void drawScreen(void) {
  // draws circles on display
  display.fillCircle(display.width() / 2, display.height() / 2, 2, WHITE);
  display.drawCircle(display.width() / 2, display.height() / 2, 15, WHITE);
  display.drawCircle(display.width() / 2, display.height() / 2, 30, WHITE);
  display.drawCircle(display.width() / 2, display.height() / 2, 45, WHITE);
  display.drawCircle(display.width() / 2, display.height() / 2, 60, WHITE);
  display.display();
}

void testscrolltext(void) {
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(1, 20);
  display.clearDisplay();
  display.println("Radar");
  display.print("startet");
  display.display();
  delay(200);
  display.print(".");
  display.display();
  delay(200);
  display.print(".");
  display.display();
  delay(200);
  display.print(".");
  display.display();
  delay(200);
}