/* Multiple SSD1327 1.5 Inch Oled with Arduino Mega
  Created by Yvan / https://Brainy-Bits.com
  This code is in the public domain...
  You can: copy it, use it, modify it, share it or just plain ignore it!
  Thx!
*/
#include <U8g2lib.h>  // U8g2 Library for Oled https://github.com/olikraus/u8g2

#define switch_pin1 2  // Tact Switch for 1st OLED connected to pin 8
#define switch_pin2 3  // Tact Switch for 2nd OLED connected to pin 9

int counter1 = 0; // Score counter for Player 1
int counter2 = 0; // Score counter for Player 2

int center1 = 47; // Used to Center value for counter display on OLED 1
int center2 = 47; // Used to Center value for counter display on OLED 2

// OLED 1 init
U8G2_SSD1327_MIDAS_128X128_F_4W_HW_SPI OLED1(U8G2_R0, /* cs=*/ 10, /* dc=*/ 9, /* reset=*/ 8);

// OLED 2 init 
U8G2_SSD1327_MIDAS_128X128_F_4W_HW_SPI OLED2(U8G2_R0, /* cs=*/ 11, /* dc=*/ 9, /* reset=*/ 7);

void setup(void) {
  pinMode(switch_pin1, INPUT_PULLUP);  // using Input_Pullup resistor of the Arduino
  pinMode(switch_pin2, INPUT_PULLUP);  // using Input_Pullup resistor of the Arduino

  OLED1.begin();  //  Start OLED 1
  OLED1.setContrast(200);  //  Brightness setting from 0 to 255

  OLED2.begin();  //  Start OLED 2
  OLED2.setContrast(50);  //  Brightness setting from 0 to 255

  // Choose small font for Player 1 text display
  OLED1.setFont(u8g2_font_fub17_tr);
  OLED1.clearBuffer();  // Clear OLED 1
  OLED1.setCursor(10, 32);
  OLED1.print("PLAYER 1");
  OLED1.drawRFrame(0, 7, 128, 32, 7);  // Draw frame around Player 1 text
  OLED1.setFont(u8g2_font_fub42_tr);  // Choose bigger font for score display
  OLED1.setCursor(center1, 117);
  OLED1.print(counter1);  // Display counter 1 value
  OLED1.drawRFrame(0, 65, 128, 63, 7);
  OLED1.sendBuffer();  // Send to OLED 1

  // Same for OLED 2
  OLED2.setFont(u8g2_font_fub17_tr);
  OLED2.clearBuffer();
  OLED2.setCursor(10, 32);
  OLED2.print("PLAYER 2");
  OLED2.drawRFrame(0, 7, 128, 32, 7);
  OLED2.setFont(u8g2_font_fub42_tr);
  OLED2.setCursor(center2, 117);
  OLED2.print(counter2);
  OLED2.drawRFrame(0, 65, 128, 63, 7);
  OLED2.sendBuffer();

}

void loop() {
  // If tact switch 1 is clicked
  if (digitalRead(switch_pin1) == LOW) {
    counter1++;  // increase counter
    switch (counter1) {
      case 0 ... 9:   // if counter < 10
        center1 = 47; // used to center score in OLED display
        break;
      case 10 ... 99: // if counter between 10 and 99
        center1 = 32;
        break;
      case 100 ... 999:  // if counter > 100
        center1 = 12;
        break;
    }
    OLED1.clearBuffer();
    OLED1.setFont(u8g2_font_fub17_tr);
    OLED1.setCursor(10, 32);
    OLED1.print("PLAYER 1");
    OLED1.drawRFrame(0, 7, 128, 32, 7);
    OLED1.setFont(u8g2_font_fub42_tr);
    OLED1.setCursor(center1, 117);
    OLED1.print(counter1);
    OLED1.drawRFrame(0, 65, 128, 63, 7);
    OLED1.sendBuffer();
    delay(10);
  }

  if (digitalRead(switch_pin2) == LOW) {
    counter2++;
    switch (counter2) {
      case 0 ... 9:
        center2 = 47;
        break;
      case 10 ... 99:
        center2 = 32;
        break;
      case 100 ... 999:
        center2 = 12;
        break;
    }
    OLED2.clearBuffer();
    OLED2.setCursor(10, 32);
    OLED2.setFont(u8g2_font_fub17_tr);
    OLED2.setFontMode(0);
    OLED2.setDrawColor(1);
    OLED2.print("PLAYER 2");
    OLED2.drawRFrame(0, 7, 128, 32, 7);
    OLED2.setFont(u8g2_font_fub42_tr);
    OLED2.setCursor(center2, 117);
    OLED2.print(counter2);
    OLED2.drawRFrame(0, 65, 128, 63, 7);
    OLED2.sendBuffer();
    delay(10);
  }
}