// 10 August 2023
// Code by: xvatriusx
// Forum: https://forum.arduino.cc/t/vertical-16x2-lcd-numbers-made-help-with-improvement/1156130
// Changes by Koepel:
//   Remove everything that is not for the vertical font.
//   Changed Arduino B00000 to 'C' language 0b00000.
//   Everything in a table, so it is easier to add PROGMEM.

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

const byte glyph[6][8] =
{ 
  {
    0b00000,
    0b00000,
    0b00000,
    0b00000,
    0b00000,
    0b00000,
    0b00000,
    0b11111
  },
  {
    0b11111,
    0b00001,
    0b00001,
    0b00001,
    0b00001,
    0b00001,
    0b00001,
    0b11111
  },
  {
    0b11111,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001
  },
  {
    0b11111,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b11111
  },
  {
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b10001,
    0b11111
  },
  {
    0b11111,
    0b10000,
    0b10000,
    0b10000,
    0b10000,
    0b10000,
    0b10000,
    0b11111
  }
};

const byte combine[10][2] =
{
  {5, 1},      // 0
  {0, 0},      // 1
  {2, 4},      // 2
  {4, 4},      // 3
  {0, 5},      // 4
  {4, 2},      // 5
  {3, 2},      // 6
  {0, 1},      // 7
  {3, 3},      // 8
  {0, 3},      // 9
};

LiquidCrystal_I2C lcd(0x27, 16, 2); // Set the LCD address and dimensions

void setup()
{
  Serial.begin(115200);
  Wire.begin();
  lcd.begin(16, 2); // Set the LCD dimensions
  lcd.backlight();  // Turn on the LCD backlight

  for( int i=0; i<6; i++)
  {
    lcd.createChar(i, glyph[i]);
  }

  lcd.clear();

  // Demonstration of all the numbers
  vert_number(0, 0, 0);
  vert_number(0, 1, 1);
  vert_number(1, 0, 2);
  vert_number(1, 1, 3);
  vert_number(2, 0, 4);
  vert_number(2, 1, 5);
  vert_number(3, 0, 6);
  vert_number(3, 1, 7);
  vert_number(4, 0, 8);
  vert_number(4, 1, 9);
}

void loop()
{
  delay(100);
}

// Maybe add that a number can be  placed halfway the vertical row ?
// The vertical row is 0...7
// The vertical column is 0...1
void vert_number(int row, int column, int inDigit)
{
  int x = 14 - (2 * row);
  int y = column;
  lcd.setCursor(x, y);          // x, y
  lcd.write(combine[inDigit][0]);
  lcd.write(combine[inDigit][1]);
}