/*
 * Copyright (C) 2022, Andrei Egorov
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include <Wire.h>
#define ssd1306_addr 0x3C
static const uint8_t PROGMEM init_bytes[]={0x00,0xAE,0xD5,0x80,0xA8,0x3F,0xD3,0x00,0x40,0x8D,0x14,0x20,0x00,0xA1,0xC8,
                                           0xDA,0x12,0xD9,0xF1,0xDB,0x40,0xA4,0xA6,0xAF};

static const uint8_t PROGMEM arduino[] = {
	0x00, 0x7c, 0x12, 0x12, 0x12, 0x7c, 0x00, 0x7e, 0x12, 0x12, 0x12, 0x6c, 0x00, 0x7e, 0x42, 0x42, 
	0x42, 0x3c, 0x00, 0x3e, 0x40, 0x40, 0x40, 0x3e, 0x00, 0x7a, 0x00, 0x7e, 0x08, 0x10, 0x20, 0x7e, 
	0x00, 0x3c, 0x42, 0x42, 0x42, 0x3c, 0x00, 0x40, 0x00, 0x7e, 0x12, 0x12, 0x12, 0x6c, 0x00, 0x3e, 
	0x40, 0x40, 0x40, 0x3e, 0x00
};

void setup() {
  Wire.begin();
  Wire.setClock(800000);
  Wire.beginTransmission(ssd1306_addr);
  for (uint8_t i=0; i<sizeof(init_bytes); i++) {
    Wire.write(pgm_read_byte(init_bytes+i));
  }
  Wire.endTransmission();
}

void loop() {
  uint8_t p=0;
  Wire.beginTransmission(ssd1306_addr);
  Wire.write(0x40);
  for (uint8_t i=0;i<28;i++) Wire.write(pgm_read_byte(arduino+p++));
  Wire.endTransmission();
  Wire.beginTransmission(ssd1306_addr);
  Wire.write(0x40);
  for (uint8_t i=0;i<25;i++) Wire.write(pgm_read_byte(arduino+p++));
  Wire.endTransmission();
  for (uint8_t i=0;i<128*8/16-3;i++) {
    Wire.beginTransmission(ssd1306_addr);
    Wire.write(0x40);
    Wire.write(0x33);
    Wire.write(0x33);
    Wire.write(0xCC);
    Wire.write(0xCC);
    Wire.write(0x33);
    Wire.write(0x33);
    Wire.write(0xCC);
    Wire.write(0xCC);
    Wire.write(0x33);
    Wire.write(0x33);
    Wire.write(0xCC);
    Wire.write(0xCC);
    if (i<(128*8/16-4)) {
      Wire.write(0x33);
      Wire.write(0x33);
      Wire.write(0xCC);
      Wire.write(0xCC);
    }
    Wire.endTransmission();
  }
}