OLED дисплеи на сегодняшний день являются самыми совершенными типами дисплеев, и причин тому много: широкие углы обзора, низкое энергопотребление, малая толщина дисплеев и отсутствие необходимости во внешней подсветке.
OLED модуль с расширением 128×32 (0.91 дюйма) имеет монохромный дисплей и управляется по I2C-интерфейсу. Управляющий контроллер — SSD1306.
Пример
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#include <SPI.h> #include <Wire.h> #include <Adafruit_GFX.h> #include <Adafruit_SSD1306.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, &Wire, OLED_RESET); #define NUMFLAKES 10 // Number of snowflakes in the animation example #define LOGO_HEIGHT 16 #define LOGO_WIDTH 16 static const unsigned char PROGMEM logo_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 }; void setup() { Serial.begin(9600); // 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.display(); delay(2000); // Pause for 2 seconds // Clear the buffer display.clearDisplay(); // Draw a single pixel in white display.drawPixel(10, 10, SSD1306_WHITE); // Show the display buffer on the screen. You MUST call display() after // drawing commands to make them visible on screen! display.display(); delay(2000); // display.display() is NOT necessary after every single drawing command, // unless that's what you want...rather, you can batch up a bunch of // drawing operations and then update the screen all at once by calling // display.display(). These examples demonstrate both approaches... testdrawline(); // Draw many lines testdrawrect(); // Draw rectangles (outlines) testfillrect(); // Draw rectangles (filled) testdrawcircle(); // Draw circles (outlines) testfillcircle(); // Draw circles (filled) testdrawroundrect(); // Draw rounded rectangles (outlines) testfillroundrect(); // Draw rounded rectangles (filled) testdrawtriangle(); // Draw triangles (outlines) testfilltriangle(); // Draw triangles (filled) testdrawchar(); // Draw characters of the default font testdrawstyles(); // Draw 'stylized' characters testscrolltext(); // Draw scrolling text testdrawbitmap(); // Draw a small bitmap image // Invert and restore display, pausing in-between display.invertDisplay(true); delay(1000); display.invertDisplay(false); delay(1000); testanimate(logo_bmp, LOGO_WIDTH, LOGO_HEIGHT); // Animate bitmaps } void loop() { } void testdrawline() { int16_t i; display.clearDisplay(); // Clear display buffer for(i=0; i<display.width(); i+=4) { display.drawLine(0, 0, i, display.height()-1, SSD1306_WHITE); display.display(); // Update screen with each newly-drawn line delay(1); } for(i=0; i<display.height(); i+=4) { display.drawLine(0, 0, display.width()-1, i, SSD1306_WHITE); display.display(); delay(1); } delay(250); display.clearDisplay(); for(i=0; i<display.width(); i+=4) { display.drawLine(0, display.height()-1, i, 0, SSD1306_WHITE); display.display(); delay(1); } for(i=display.height()-1; i>=0; i-=4) { display.drawLine(0, display.height()-1, display.width()-1, i, SSD1306_WHITE); display.display(); delay(1); } delay(250); display.clearDisplay(); for(i=display.width()-1; i>=0; i-=4) { display.drawLine(display.width()-1, display.height()-1, i, 0, SSD1306_WHITE); display.display(); delay(1); } for(i=display.height()-1; i>=0; i-=4) { display.drawLine(display.width()-1, display.height()-1, 0, i, SSD1306_WHITE); display.display(); delay(1); } delay(250); display.clearDisplay(); for(i=0; i<display.height(); i+=4) { display.drawLine(display.width()-1, 0, 0, i, SSD1306_WHITE); display.display(); delay(1); } for(i=0; i<display.width(); i+=4) { display.drawLine(display.width()-1, 0, i, display.height()-1, SSD1306_WHITE); display.display(); delay(1); } delay(2000); // Pause for 2 seconds } void testdrawrect(void) { display.clearDisplay(); for(int16_t i=0; i<display.height()/2; i+=2) { display.drawRect(i, i, display.width()-2*i, display.height()-2*i, SSD1306_WHITE); display.display(); // Update screen with each newly-drawn rectangle delay(1); } delay(2000); } void testfillrect(void) { display.clearDisplay(); for(int16_t i=0; i<display.height()/2; i+=3) { // The INVERSE color is used so rectangles alternate white/black display.fillRect(i, i, display.width()-i*2, display.height()-i*2, SSD1306_INVERSE); display.display(); // Update screen with each newly-drawn rectangle delay(1); } delay(2000); } void testdrawcircle(void) { display.clearDisplay(); for(int16_t i=0; i<max(display.width(),display.height())/2; i+=2) { display.drawCircle(display.width()/2, display.height()/2, i, SSD1306_WHITE); display.display(); delay(1); } delay(2000); } void testfillcircle(void) { display.clearDisplay(); for(int16_t i=max(display.width(),display.height())/2; i>0; i-=3) { // The INVERSE color is used so circles alternate white/black display.fillCircle(display.width() / 2, display.height() / 2, i, SSD1306_INVERSE); display.display(); // Update screen with each newly-drawn circle delay(1); } delay(2000); } void testdrawroundrect(void) { display.clearDisplay(); 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, SSD1306_WHITE); display.display(); delay(1); } delay(2000); } void testfillroundrect(void) { display.clearDisplay(); for(int16_t i=0; i<display.height()/2-2; i+=2) { // The INVERSE color is used so round-rects alternate white/black display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, SSD1306_INVERSE); display.display(); delay(1); } delay(2000); } void testdrawtriangle(void) { display.clearDisplay(); for(int16_t i=0; i<max(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, SSD1306_WHITE); display.display(); delay(1); } delay(2000); } void testfilltriangle(void) { display.clearDisplay(); for(int16_t i=max(display.width(),display.height())/2; i>0; i-=5) { // The INVERSE color is used so triangles alternate white/black 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, SSD1306_INVERSE); display.display(); delay(1); } delay(2000); } void testdrawchar(void) { display.clearDisplay(); display.setTextSize(1); // Normal 1:1 pixel scale display.setTextColor(SSD1306_WHITE); // Draw white text display.setCursor(0, 0); // Start at top-left corner display.cp437(true); // Use full 256 char 'Code Page 437' font // Not all the characters will fit on the display. This is normal. // Library will draw what it can and the rest will be clipped. for(int16_t i=0; i<256; i++) { if(i == '\n') display.write(' '); else display.write(i); } display.display(); delay(2000); } void testdrawstyles(void) { display.clearDisplay(); display.setTextSize(1); // Normal 1:1 pixel scale display.setTextColor(SSD1306_WHITE); // Draw white text display.setCursor(0,0); // Start at top-left corner display.println(F("Hello, world!")); display.setTextColor(SSD1306_BLACK, SSD1306_WHITE); // Draw 'inverse' text display.println(3.141592); display.setTextSize(2); // Draw 2X-scale text display.setTextColor(SSD1306_WHITE); display.print(F("0x")); display.println(0xDEADBEEF, HEX); display.display(); delay(2000); } void testscrolltext(void) { display.clearDisplay(); display.setTextSize(2); // Draw 2X-scale text display.setTextColor(SSD1306_WHITE); display.setCursor(10, 0); display.println(F("scroll")); display.display(); // Show initial text delay(100); // Scroll in various directions, pausing in-between: 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(); delay(1000); } void testdrawbitmap(void) { display.clearDisplay(); display.drawBitmap( (display.width() - LOGO_WIDTH ) / 2, (display.height() - LOGO_HEIGHT) / 2, logo_bmp, LOGO_WIDTH, LOGO_HEIGHT, 1); display.display(); delay(1000); } #define XPOS 0 // Indexes into the 'icons' array in function below #define YPOS 1 #define DELTAY 2 void testanimate(const uint8_t *bitmap, uint8_t w, uint8_t h) { int8_t f, icons[NUMFLAKES][3]; // Initialize 'snowflake' positions for(f=0; f< NUMFLAKES; f++) { icons[f][XPOS] = random(1 - LOGO_WIDTH, display.width()); icons[f][YPOS] = -LOGO_HEIGHT; icons[f][DELTAY] = random(1, 6); Serial.print(F("x: ")); Serial.print(icons[f][XPOS], DEC); Serial.print(F(" y: ")); Serial.print(icons[f][YPOS], DEC); Serial.print(F(" dy: ")); Serial.println(icons[f][DELTAY], DEC); } for(;;) { // Loop forever... display.clearDisplay(); // Clear the display buffer // Draw each snowflake: for(f=0; f< NUMFLAKES; f++) { display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, SSD1306_WHITE); } display.display(); // Show the display buffer on the screen delay(200); // Pause for 1/10 second // Then update coordinates of each flake... for(f=0; f< NUMFLAKES; f++) { icons[f][YPOS] += icons[f][DELTAY]; // If snowflake is off the bottom of the screen... if (icons[f][YPOS] >= display.height()) { // Reinitialize to a random position, just off the top icons[f][XPOS] = random(1 - LOGO_WIDTH, display.width()); icons[f][YPOS] = -LOGO_HEIGHT; icons[f][DELTAY] = random(1, 6); } } } } |
Библиотека Adafruit SSD1306 (ZIP)
Библиотека Adafruit GFX (ZIP)
