View source for WeMOS: D1 R1 mini OLED 0.91 128x32

http://www.getmicros.net/esp8266-and-128-x-32-oled-example.php



 #include <SPI.h>
 #include <Wire.h>
 #include <Adafruit_GFX.h>
 #include <Adafruit_SSD1306.h>
  
 #define OLED_RESET 0
 Adafruit_SSD1306 display(OLED_RESET);
  
 #define NUMFLAKES 10
 #define XPOS 0
 #define YPOS 1
 #define DELTAY 2
 
 
 #define LOGO16_GLCD_HEIGHT 16 
 #define LOGO16_GLCD_WIDTH  16 
 static const unsigned char PROGMEM logo16_glcd_bmp[] =
 { B00000000, B11000000,
   B00000001, B11000000,
   B00000001, B11000000,
   B00000011, B11100000,
   B11110011, B11100000,
   B11111110, B11111000,
   B01111110, B11111111,
   B00110011, B10011111,
   B00011111, B11111100,
   B00001101, B01110000,
   B00011011, B10100000,
   B00111111, B11100000,
   B00111111, B11110000,
   B01111100, B11110000,
   B01110000, B01110000,
   B00000000, B00110000 };
  
 #if (SSD1306_LCDHEIGHT != 32)
 #error("Height incorrect, please fix Adafruit_SSD1306.h!");
 #endif
  
 void setup()   {                
   Serial.begin(9600);
  
   // by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
   display.begin(SSD1306_SWITCHCAPVCC, 0x3C);  // initialize with the I2C addr 0x3C (for the 128x32)
   // init done
  
   // Show image buffer on the display hardware.
   // Since the buffer is intialized with an Adafruit splashscreen
   // internally, this will display the splashscreen.
   display.display();
   delay(2000);
  
   // Clear the buffer.
   display.clearDisplay();
  
   // draw a single pixel
   display.drawPixel(10, 10, WHITE);
   // Show the display buffer on the hardware.
   // NOTE: You _must_ call display after making any drawing commands
   // to make them visible on the display hardware!
   display.display();
   delay(2000);
   display.clearDisplay();
  
   // draw many lines
   testdrawline();
   display.display();
   delay(2000);
   display.clearDisplay();
  
   // draw rectangles
   testdrawrect();
   display.display();
   delay(2000);
   display.clearDisplay();
  
   // draw multiple rectangles
   testfillrect();
   display.display();
   delay(2000);
   display.clearDisplay();
  
   // draw mulitple circles
   testdrawcircle();
   display.display();
   delay(2000);
   display.clearDisplay();
  
   // draw a white circle, 10 pixel radius
   display.fillCircle(display.width()/2, display.height()/2, 10, WHITE);
   display.display();
   delay(2000);
   display.clearDisplay();
  
   testdrawroundrect();
   delay(2000);
   display.clearDisplay();
  
   testfillroundrect();
   delay(2000);
   display.clearDisplay();
  
   testdrawtriangle();
   delay(2000);
   display.clearDisplay();
  
   testfilltriangle();
   delay(2000);
   display.clearDisplay();
  
   // draw the first ~12 characters in the font
   testdrawchar();
   display.display();
   delay(2000);
   display.clearDisplay();
  
   // draw scrolling text
   testscrolltext();
   delay(2000);
   display.clearDisplay();
  
   // text display tests
   display.setTextSize(1);
   display.setTextColor(WHITE);
   display.setCursor(0,0);
   display.println("Hello, world!");
   display.setTextColor(BLACK, WHITE); // 'inverted' text
   display.println(3.141592);
   display.setTextSize(2);
   display.setTextColor(WHITE);
   display.print("0x"); display.println(0xDEADBEEF, HEX);
   display.display();
   delay(2000);
   display.clearDisplay();
  
   // miniature bitmap display
   display.drawBitmap(30, 16,  logo16_glcd_bmp, 16, 16, 1);
   display.display();
   delay(1);
  
   // invert the display
   display.invertDisplay(true);
   delay(1000); 
   display.invertDisplay(false);
   delay(1000); 
   display.clearDisplay();
  
   // draw a bitmap icon and 'animate' movement
   testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);
 }
  
  
 void loop() {
  
 }
  
  
 void testdrawbitmap(const uint8_t *bitmap, uint8_t w, uint8_t h) {
   uint8_t icons[NUMFLAKES][3];
  
   // initialize
   for (uint8_t f=0; f< NUMFLAKES; f++) {
     icons[f][XPOS] = random(display.width());
     icons[f][YPOS] = 0;
      icons[f][DELTAY] = random(5) + 1;
  
     Serial.print("x: ");
     Serial.print(icons[f][XPOS], DEC);
     Serial.print(" y: ");
     Serial.print(icons[f][YPOS], DEC);
     Serial.print(" dy: ");
     Serial.println(icons[f][DELTAY], DEC);
   }
  
   while (1) {
     // draw each icon
     for (uint8_t f=0; f< NUMFLAKES; f++) {
       display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, WHITE);
     }
     display.display();
     delay(200);
  
     // then erase it + move it
     for (uint8_t f=0; f< NUMFLAKES; f++) {
       display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, BLACK);
       // move it
       icons[f][YPOS] += icons[f][DELTAY];
       // if its gone, reinit
       if (icons[f][YPOS] > display.height()) {
         icons[f][XPOS] = random(display.width());
         icons[f][YPOS] = 0;
         icons[f][DELTAY] = random(5) + 1;
       }
     }
    }
 }
  
  
 void testdrawchar(void) {
   display.setTextSize(1);
   display.setTextColor(WHITE);
   display.setCursor(0,0);
  
    for (uint8_t i=0; i < 168; i++) {
     if (i == '\n') continue;
     display.write(i);
     if ((i > 0) && (i % 21 == 0))
       display.println();
   }    
   display.display();
   delay(1);
 }
  
 void testdrawcircle(void) {
   for (int16_t i=0; i<display.height(); i+=2) {
     display.drawCircle(display.width()/2, display.height()/2, i, WHITE);
     display.display();
     delay(1);
   }
 }
  
 void testfillrect(void) {
   uint8_t color = 1;
   for (int16_t i=0; i<display.height()/2; i+=3) {
     // alternate colors
     display.fillRect(i, i, display.width()-i*2, display.height()-i*2, color%2);
     display.display();
     delay(1);
     color++;
   }
 }
  
 void testdrawtriangle(void) {
   for (int16_t i=0; i<min(display.width(),display.height())/2; i+=5) {
     display.drawTriangle(display.width()/2, display.height()/2-i,
                      display.width()/2-i, display.height()/2+i,
                      display.width()/2+i, display.height()/2+i, WHITE);
     display.display();
     delay(1);
   }
 }
  
 void testfilltriangle(void) {
   uint8_t color = WHITE;
   for (int16_t i=min(display.width(),display.height())/2; i>0; i-=5) {
     display.fillTriangle(display.width()/2, display.height()/2-i,
                      display.width()/2-i, display.height()/2+i,
                      display.width()/2+i, display.height()/2+i, WHITE);
     if (color == WHITE) color = BLACK;
     else color = WHITE;
     display.display();
     delay(1);
   }
 }
  
 void testdrawroundrect(void) {
   for (int16_t i=0; i<display.height()/2-2; i+=2) {
     display.drawRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, WHITE);
     display.display();
     delay(1);
   }
 }
  
 void testfillroundrect(void) {
   uint8_t color = WHITE;
   for (int16_t i=0; i<display.height()/2-2; i+=2) {
     display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, color);
     if (color == WHITE) color = BLACK;
     else color = WHITE;
     display.display();
     delay(1);
   }
 }
  
 void testdrawrect(void) {
   for (int16_t i=0; i<display.height()/2; i+=2) {
     display.drawRect(i, i, display.width()-2*i, display.height()-2*i, WHITE);
     display.display();
     delay(1);
   }
 }
  
 void testdrawline() {  
   for (int16_t i=0; i<display.width(); i+=4) {
     display.drawLine(0, 0, i, display.height()-1, WHITE);
     display.display();
     delay(1);
   }
   for (int16_t i=0; i<display.height(); i+=4) {
     display.drawLine(0, 0, display.width()-1, i, WHITE);
     display.display();
     delay(1);
   }
   delay(250);
  
   display.clearDisplay();
   for (int16_t i=0; i<display.width(); i+=4) {
     display.drawLine(0, display.height()-1, i, 0, WHITE);
     display.display();
     delay(1);
   }
   for (int16_t i=display.height()-1; i>=0; i-=4) {
     display.drawLine(0, display.height()-1, display.width()-1, i, WHITE);
     display.display();
     delay(1);
   }
   delay(250);
  
   display.clearDisplay();
   for (int16_t i=display.width()-1; i>=0; i-=4) {
     display.drawLine(display.width()-1, display.height()-1, i, 0, WHITE);
     display.display();
     delay(1);
   }
   for (int16_t i=display.height()-1; i>=0; i-=4) {
     display.drawLine(display.width()-1, display.height()-1, 0, i, WHITE);
     display.display();
     delay(1);
   }
   delay(250);
  
   display.clearDisplay();
   for (int16_t i=0; i<display.height(); i+=4) {
     display.drawLine(display.width()-1, 0, 0, i, WHITE);
     display.display();
     delay(1);
   }
   for (int16_t i=0; i<display.width(); i+=4) {
     display.drawLine(display.width()-1, 0, i, display.height()-1, WHITE); 
     display.display();
     delay(1);
   }
   delay(250);
 }
  
 void testscrolltext(void) {
   display.setTextSize(2);
   display.setTextColor(WHITE);
   display.setCursor(10,0);
   display.clearDisplay();
   display.println("scroll");
   display.display();
   delay(1);
  
   display.startscrollright(0x00, 0x0F);
   delay(2000);
   display.stopscroll();
   delay(1000);
   display.startscrollleft(0x00, 0x0F);
   delay(2000);
   display.stopscroll();
   delay(1000);    
   display.startscrolldiagright(0x00, 0x07);
   delay(2000);
   display.startscrolldiagleft(0x00, 0x07);
   delay(2000);
   display.stopscroll();
   }