SSD1306_OLED/128x64/DoubleBuffer/DoubleBuffer.ino

Show double buffering usage

/*
  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - <http://www.fabgl.com>
  Copyright (c) 2019-2022 Fabrizio Di Vittorio.
  All rights reserved.
 
 
* Please contact fdivitto2013@gmail.com if you need a commercial license.
 
 
* This library and related software is available under GPL v3.
 
  FabGL 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.
 
  FabGL 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 FabGL.  If not, see <http://www.gnu.org/licenses/>.
 */
 
 
/*
 * OLED - SDA => GPIO 4
 * OLED - SCL => GPIO 15
 */
 
 
#include "fabgl.h"
 
 
 
#define OLED_SDA       GPIO_NUM_4
#define OLED_SCL       GPIO_NUM_15
#define OLED_ADDR      0x3C
 
// if your display hasn't RESET set to GPIO_UNUSED
#define OLED_RESET     GPIO_UNUSED  // ie Heltec has GPIO_NUM_16 for reset
 
 
 
fabgl::I2C               I2C;
fabgl::SSD1306Controller DisplayController;
 
 
 
void setup()
{
  Serial.begin(115200); delay(500); Serial.write("\n\n\n"); // DEBUG ONLY  
 
  I2C.begin(OLED_SDA, OLED_SCL);
 
  DisplayController.begin(&I2C, OLED_ADDR, OLED_RESET);
  DisplayController.setResolution(OLED_128x64, 128, 64, true);
 
  while (!DisplayController.available()) {
    Serial.write("Error, SSD1306 not available!\n");
    delay(5000);
  }
 
}
 
 
void loop()
{
  Canvas cv(&DisplayController);
 
  for (int j = 1; j < 32; ++j) {
    cv.setPenWidth(j);
    for (int i = 0; i < 360; i += 10) {
      cv.clear();
      double a = (double) i * M_PI / 180.0;
      double w = cv.getWidth() / 2.0;
      double h = cv.getHeight() / 2.0;
      int x1 = w + cos(a) * w;
      int y1 = h + sin(a) * h;
      int x2 = w + cos(a + M_PI) * w;
      int y2 = h + sin(a + M_PI) * h;
      cv.drawLine(x1, y1, x2, y2);
      cv.swapBuffers();
      delay(60);
    }
  }
 
 
}