iic驱动0.96OLED

/*接线
oled--------mege2560
SCL-------->21(SCL)
SDA-------->20(SDA)
*/
#include <Arduino.h>
#include <U8g2lib.h>

#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
#ifdef U8X8_HAVE_HW_I2C
#include <Wire.h>
#endif

U8G2_SSD1306_128X64_NONAME_1_SW_I2C u8g2(U8G2_R0, /* clock=*/ 21, /* data=*/ 20, /* reset=*/ 8);
//U8G2_SSD1306_128X64_NONAME_1_SW_I2C u8g2(U8G2_R0, /* clock=*/ SCL, /* data=*/ SDA, /* reset=*/ U8X8_PIN_NONE);   // All Boards without Reset of the Display

//#define MINI_LOGO

void setup(void) {
          
   
  /* U8g2 Project: SSD1306 Test Board */
  //pinMode(10, OUTPUT);
  //pinMode(9, OUTPUT);
  //digitalWrite(10, 0);
  //digitalWrite(9, 0);   

  /* U8g2 Project: T6963 Test Board */
  //pinMode(18, OUTPUT);
  //digitalWrite(18, 1);

  /* U8g2 Project: KS0108 Test Board */
  //pinMode(16, OUTPUT);
  //digitalWrite(16, 0);  

  /* U8g2 Project: LC7981 Test Board, connect RW to GND */
  //pinMode(17, OUTPUT);
  //digitalWrite(17, 0);  

  /* U8g2 Project: Pax Instruments Shield: Enable Backlight */
  //pinMode(6, OUTPUT);
  //digitalWrite(6, 0); 


  u8g2.begin();
  u8g2.setFlipMode(0);
}

void drawLogo(void)
{
          
   
  uint8_t mdy = 0;
  if ( u8g2.getDisplayHeight() < 59 )
    mdy = 5;
  

    u8g2.setFontMode(1);  // Transparent
    u8g2.setDrawColor(1);
#ifdef MINI_LOGO

    u8g2.setFontDirection(0);
    u8g2.setFont(u8g2_font_inb16_mf);
    u8g2.drawStr(0, 22, "U");
    
    u8g2.setFontDirection(1);
    u8g2.setFont(u8g2_font_inb19_mn);
    u8g2.drawStr(14,8,"8");
    
    u8g2.setFontDirection(0);
    u8g2.setFont(u8g2_font_inb16_mf);
    u8g2.drawStr(36,22,"g");
    u8g2.drawStr(48,22,"xb2");
    
    u8g2.drawHLine(2, 25, 34);
    u8g2.drawHLine(3, 26, 34);
    u8g2.drawVLine(32, 22, 12);
    u8g2.drawVLine(33, 23, 12);
#else

    u8g2.setFontDirection(0);
    u8g2.setFont(u8g2_font_inb24_mf);
    u8g2.drawStr(0, 30-mdy, "U");
    
    u8g2.setFontDirection(1);
    u8g2.setFont(u8g2_font_inb30_mn);
    u8g2.drawStr(21,8-mdy,"8");
        
    u8g2.setFontDirection(0);
    u8g2.setFont(u8g2_font_inb24_mf);
    u8g2.drawStr(51,30-mdy,"g");
    u8g2.drawStr(67,30-mdy,"xb2");
    
    u8g2.drawHLine(2, 35-mdy, 47);
    u8g2.drawHLine(3, 36-mdy, 47);
    u8g2.drawVLine(45, 32-mdy, 12);
    u8g2.drawVLine(46, 33-mdy, 12);
    
#endif

}

void drawURL(void)
{
          
   
#ifndef MINI_LOGO
  u8g2.setFont(u8g2_font_4x6_tr);
  if ( u8g2.getDisplayHeight() < 59 )
  {
          
   
    u8g2.drawStr(89,20-5,"github.com");
    u8g2.drawStr(73,29-5,"/olikraus/u8g2");
  }
  else
  {
          
   
    u8g2.drawStr(1,54,"github.com/olikraus/u8g2");
  }
#endif
}

void loop(void) {
          
   
  u8g2.firstPage();
  do {
          
   
    drawLogo();
    drawURL();
  } while ( u8g2.nextPage() );
  delay(4000);
}

这两个初始化随便用一个。

演示效果