Arduino SH1106 test sketch

#include "U8glib.h"

U8GLIB_SH1106_128X64 u8g(13, 11, 10, 9);

int cnt;

void draw(void) {
  // graphic commands to redraw the complete screen should be placed here
  u8g.setFont(u8g_font_unifont);
  //u8g.setFont(u8g_font_osb21);
  u8g.drawStr( 0, 22, "Hello World!");
}

void setup(void) {
  // flip screen, if required
  // u8g.setRot180();

  // set SPI backup if required
  //u8g.setHardwareBackup(u8g_backup_avr_spi);

  // assign default color value
  if ( u8g.getMode() == U8G_MODE_R3G3B2 ) {
    u8g.setColorIndex(255);     // white
  }
  else if ( u8g.getMode() == U8G_MODE_GRAY2BIT ) {
    u8g.setColorIndex(3);         // max intensity
  }
  else if ( u8g.getMode() == U8G_MODE_BW ) {
    u8g.setColorIndex(1);         // pixel on
  }
  else if ( u8g.getMode() == U8G_MODE_HICOLOR ) {
    u8g.setHiColorByRGB(255,255,255);
  }

  cnt = 3;
}

void loop(void) {
  // picture loop
  u8g.firstPage();
  do {
    draw();
  } while( u8g.nextPage() );

  // rebuild the picture after some delay
  delay(1000);

  switch(--cnt){
    case 2:
      u8g.setRot90();
      break;
    case 1:
      u8g.setRot180();
      break;
    case 0:
      u8g.setRot270();
      break;
    default:
      u8g.undoRotation();
      cnt = 3;
  }

}