<file c++ display_SSD1306_OLED_u8glib.ino>
/*
 * display_SSD1306_OLED_u8glib.ino
 *  
 * Test screen update speed with large solid fonts on 
 * a 128x64 OLED screen that uses the SD1306 chip.
 * 
 * Consumes 56% of program storage space and
 * 13% of dynamic memory on a Nano.
 *  
 * Mithat Konar
 */


#include "U8glib.h"

/*
   Pin assignments:
   RST: 8
   CE/CS/SCE: 10
   DC/"D/C"/A0: 9
   DIN/DN/MOSI/DATA: 11 (Arduino HW standard)
   CLK/SCLK/SCK: 13  (Arduino HW standard)
   VCC: 5V (part is allegedly 5V tolerant)
   GND: ground
*/

const unsigned int CLOCK_PIN = 13,
                   DATA_PIN = 11,
                   CS_PIN = 10,
                   DC_PIN = 9,
                   RESET_PIN = 8;

U8GLIB_SSD1306_128X64 disp(CS_PIN, DC_PIN, RESET_PIN);   // HW SPI

unsigned int counter = 80;
char dispStr[4];    // null terminated char array used to pass to renderer.

void setup(void) {
  disp.setColorIndex(1);
}

void loop(void) {
  counter = (counter + 1) % 1000;
  
  // picture loop
  disp.firstPage();
  do {
    
    disp.setFont(u8g_font_unifont);
    disp.drawStr(0, 13, "SSD1306 u8glib");

    disp.setFont(u8g_font_fub25r);  // the largest font with chars that ships w/ lib
    String(counter).toCharArray(dispStr, 4);
    disp.drawStr( 0, 63, dispStr);
  } while ( disp.nextPage() );

  // rebuild the picture after some delay
  delay(500);
}
</file>