Arduino에서 SSD1306을 이용하여 문자 출력을 어떻게 해야 하나요?

Question

안녕하세요.Arduino Nano를 가지고 이번에 샘플로 들어온 SSD1306이라는 OLED display를 테스트 하고자 합니다.SSD1306이 I2C통신을 하는데 혹시 기본적인 문자열 출력을 하는 방법을 알 수 있을까요?답변 부탁 드립니다.

남다른메추리264 · Accepted Answer

안녕하세요~우선 SSD1306 사양서를 보시고 통신 방식을 확인하셔야 합니다.제가 얼마 전에 만든 code 올립니다.헤더는 SPI.h와 Wire.h를 기본으로 including 하셔야 합니다.font는 구글링하면 제가 사용한 헤더를 구하실 수 있을 것 같네요.감사합니다.#include &lt;SPI.h&gt;
#include &lt;Wire.h&gt;
#include &lt;Adafruit_GFX.h&gt;
#include &lt;Adafruit_SSD1306.h&gt;
#include "crafty_girls_font.h"    
#include "schoolbell_font.h"

#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels

// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET     4 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &amp;Wire, OLED_RESET);

#define NUMFLAKES     10 // Number of snowflakes in the animation example

#define LOGO_HEIGHT   25//32//16
#define LOGO_WIDTH    44//25//16
static const unsigned char PROGMEM logo_bmp[] =
{ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
  0xf8, 0x00, 0x00, 0x00, 0x00, 0x0f, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xff, 0x00, 0x00, 0x00, 
  0x01, 0xff, 0xff, 0x00, 0x03, 0xf3, 0xff, 0xff, 0xff, 0x00, 0x02, 0x10, 0x1f, 0xf0, 0xfe, 0x00, 
  0x02, 0x10, 0x1f, 0xf0, 0xfe, 0x00, 0x02, 0x12, 0x1f, 0xf0, 0xfc, 0x00, 0x02, 0x1e, 0x1f, 0xf0, 
  0xfc, 0x00, 0x02, 0x00, 0x1e, 0x70, 0xf8, 0x00, 0x02, 0x00, 0x1c, 0x30, 0xf0, 0x00, 0x02, 0x00, 
  0x1c, 0x70, 0xe0, 0x00, 0x02, 0x1e, 0x1f, 0xf0, 0xc0, 0x00, 0x02, 0x1e, 0x1f, 0xf0, 0xfc, 0x00, 
  0x02, 0x1e, 0x1f, 0xf0, 0x02, 0x00, 0x02, 0x1e, 0x1f, 0xf0, 0x02, 0x00, 0x02, 0x1f, 0x3f, 0xf0, 
  0x06, 0x00, 0x03, 0xff, 0xff, 0xff, 0xfc, 0x00, 0x03, 0xff, 0xff, 0xc0, 0x00, 0x00, 0x03, 0xff, 
  0xff, 0x00, 0x00, 0x00, 0x03, 0xff, 0xf0, 0x00, 0x00, 0x00, 0x01, 0xff, 0xc0, 0x00, 0x00, 0x00, 
  0x00, 0x7c, 0x00, 0x00, 0x00, 0x00
};

void setup() {
  Serial.begin(9600);
  //Serial.begin(115200);

// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x32
    Serial.println(F("SSD1306 allocation failed"));
    for(;;); // Don't proceed, loop forever
  }

// Show initial display buffer contents on the screen --
  // the library initializes this with an Adafruit splash screen.
  display.clearDisplay();                     // Clear the buffer
  //display.drawBitmap((display.width() - LOGO_WIDTH ) / 2, (display.height() - LOGO_HEIGHT) / 2, logo_bmp, LOGO_WIDTH, LOGO_HEIGHT, 1);
  display.drawBitmap(0, (display.height() - LOGO_HEIGHT) / 2, logo_bmp, LOGO_WIDTH, LOGO_HEIGHT, 1);
  display.setTextSize(2);                     // Set text size
  display.setTextColor(WHITE);                // Set text color
  display.setCursor(50,10);                    // Set initial position
  display.print("TEST");
  display.display();
  delay(3000);

display.startscrollleft(0x00, 0x0F);
  delay(8500);
  display.stopscroll();
//  drawbitmap();

display.clearDisplay();                     // Clear the buffer
  display.setTextSize(2);                     // Set text size
  display.setTextColor(WHITE);                // Set text color
  display.setCursor(0,5);                    // Set initial position
//  display.setFont(&amp;Crafty_Girls_Regular_16);  // Set font
//  display.setFont(&amp;Schoolbell_Regular_16);  // Set font

display.print("Welcome^^");
  display.display();                          // Update display
  delay(3000);
  
  display.clearDisplay();
  display.setTextSize(1);                     // Set text size
  display.setCursor(0,10);                    // Set initial position
  display.print("HELLO");
  display.setCursor(0,20);                    // Set initial position
  display.print("WORLD");
  display.display();                          // Update display
  delay(3000);

display.clearDisplay();
  drawbitmap();
  display.display();
}
  
void loop() {
  
}

void drawbitmap(void) {
  display.clearDisplay();

display.drawBitmap(
    0, 0, logo_bmp, LOGO_WIDTH, LOGO_HEIGHT, 1);
    //(display.width()  - LOGO_WIDTH ) / 2,
    //(display.height() - LOGO_HEIGHT) / 2,
    //logo_bmp, LOGO_WIDTH, LOGO_HEIGHT, 1);
  display.display();
  delay(1000);
}