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

int x[2] = {2, 65};
int y[2] = {12, 12};

unsigned char i;

Adafruit_SSD1306 display(128, 64, &Wire, -1);

void setup() {
  display.begin(SSD1306_SWITCHCAPVCC, 0x3C);
}

void draw() {
  display.drawLine(0, 0, 127, 0, WHITE);     // Top
  display.drawLine(0, 0, 0, 63, WHITE);      // Left
  display.drawLine(127, 0, 127, 63, WHITE);  // Right
  display.drawLine(0, 63, 127, 63, WHITE);   // Bottom
  display.drawLine(63, 0, 63, 63, WHITE);    // Middle Vertical
  display.drawLine(0, 10, 127, 10, WHITE);   // Header separator

  // Headers
  display.setCursor(2, 2);
  display.print("us.char");
  display.setCursor(65, 2);
  display.print("char");
}

void loop() {
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);

  // Drawing the frame and text
  draw();

  // Displaying characters from 0 to 127
  for (i = 0; i <= 127; i++) {
    display.setCursor(x[0], y[0]);
    display.print(i);
    display.setCursor(x[1], y[1]);
    display.print((char)i);
    y[0] += 10;
    y[1] += 10;


    // Check if the first box is full
    if (x[0] >= 42 && y[0] >= 62) {
      // If the first box is full, clear and show the second box
      display.display();
      delay(2000);
      display.clearDisplay();
      draw();
      x[0] = 2;
      y[0] = 12;
      x[1] = 65;
      y[1] = 12;
    }
        

    // Move to the next column if the current column is full
    if (y[0] >= 62 || y[1] >= 62) {
      y[0] = 12;
      y[1] = 12;
      x[0] += 20;
      x[1] += 20;
    }
  }
      x[0] = 2;
      y[0] = 12;
      x[1] = 65;
      y[1] = 12;
  display.display();  // Show all remaining characters
  delay(2000);        // Optional: Delay to see the result before clearing
}