#include "U8glib.h"

U8GLIB_SSD1306_128X64 u8g(U8G_I2C_OPT_DEV_0 | U8G_I2C_OPT_NO_ACK | U8G_I2C_OPT_FAST); // Fast I2C / TWI

int progress = 0;

void setup() {
  u8g.setFont(u8g_font_unifont);
  u8g.setColorIndex(1);
}

void loop0() {
  u8g.firstPage();
  do {
    u8g.drawStr(25, 50, "Progress Bar");
    u8g.drawFrame(0, 10, 128, 20);
    u8g.drawBox(10, 15, progress, 10);
  } while ( u8g.nextPage() );

  if (progress < 108) {
    progress++;
  } else {
    progress = 0;
  }
}

/*
// please put some text you'll search for one day here 
// OLED minimum sketch

# include <U8glib.h>
# include <Wire.h>

U8GLIB_SSD1306_128X32 u8g(U8G_I2C_OPT_NONE);

void setupOLED()
{
  Wire.begin();
  u8g.setFont(u8g_font_unifont);
  u8g.setColorIndex(1);
}

void setup()
{
  setupOLED();

  mySetup(115200);
  xprintf("\nhello world.\n"); 
}
*/
void loop()
{
  loopz();
}

// u8g by pages
void loopz(void) {
  u8g.firstPage();  
  do  {
    draw();
  } while (u8g.nextPage());
}

// redraw the entire OLED display
void draw(void) {

  u8g.drawStr( 0, 10, "Seriously");
  u8g.drawStr( 0, 32, "3.141592653589793");
}

// programmer misses printf...

void xprintf(const char *format, ...)
{
  char buffer[256];
  va_list args;
  va_start(args, format);
  vsprintf(buffer, format, args);
  va_end(args);
  Serial.print(buffer);
}

// programmer forgets day of week, version

void mySetup(unsigned long bandRate)
{
  Serial.begin(bandRate);
  
  char s[] = __FILE__;
  byte b = sizeof(s);
  while ( (b > 0) && (s[b] != 47)) b--;
  char *u = s + b + 1;
 
  xprintf("\nHEllo WOrld!\n");
  xprintf("%s  %s\n\n", __DATE__, u);

  xprintf("!\n");
}