A derived version of the BSD licensed Adafrut GFX library for the SSD1306 controller for an OLED 128x32 or 128x64 display using SPI or I2C.
Dependents: servo_sensor ArchPro_TFT BLE_Display SSD1306_demo ... more
Import libraryAdafruit_GFX
A derived version of the BSD licensed Adafrut GFX library for the SSD1306 controller for an OLED 128x32 or 128x64 display using SPI or I2C.
This is an SPI or I2C driver, font, and graphics drawing library as initially provided by Adafruit which has been modified for use in the mbed envionment.
Example
/* * Copyright (c) 2012 Neal Horman - http://www.wanlink.com * * License: MIT open source (http://opensource.org/licenses/MIT) * Summary; * Use / modify / distribute / publish it how you want and * if you use it, or don't, you can't hold me liable for how * it does or doesn't work. * If it doesn't work how you want, don't use it, or change * it so that it does work. */ #include "mbed.h" #include "Adafruit_SSD1306.h" DigitalOut myled(LED1); // an SPI sub-class that provides a constructed default class SPIPreInit : public SPI { public: SPIPreInit(PinName mosi, PinName miso, PinName clk) : SPI(mosi,miso,clk) { format(8,3); frequency(2000000); }; }; // an I2C sub-class that provides a constructed default class I2CPreInit : public I2C { public: I2CPreInit(PinName sda, PinName scl) : I2C(sda, scl) { frequency(400000); start(); }; }; SPIPreInit gSpi(p5,NC,p7); Adafruit_SSD1306_Spi gOled1(gSpi,p26,p25,p24); I2CPreInit gI2C(p9,p10); Adafruit_SSD1306_I2c gOled2(gI2C,p27); int main() { uint16_t x=0; gOled1.printf("%ux%u OLED Display\r\n", gOled1.width(), gOled1.height()); gOled2.printf("%ux%u OLED Display\r\n", gOled2.width(), gOled2.height()); while(1) { myled = !myled; gOled1.printf("%u\r",x); gOled1.display(); gOled2.printf("%u\r",x); gOled2.display(); x++; wait(1.0); } }
Adafruit_GFX.cpp
- Committer:
- nkhorman
- Date:
- 2014-10-19
- Revision:
- 9:ddb97c9850a2
- Parent:
- 0:c3dcd4c4983a
- Child:
- 14:edb3c36aa1a7
File content as of revision 9:ddb97c9850a2:
/*********************************** This is a our graphics core library, for all our displays. We'll be adapting all the existing libaries to use this core to make updating, support and upgrading easier! Adafruit invests time and resources providing this open source code, please support Adafruit and open-source hardware by purchasing products from Adafruit! Written by Limor Fried/Ladyada for Adafruit Industries. BSD license, check license.txt for more information All text above must be included in any redistribution ****************************************/ /* * Modified by Neal Horman 7/14/2012 for use in mbed */ #include "mbed.h" #include "Adafruit_GFX.h" #include "glcdfont.h" #if defined(GFX_WANT_ABSTRACTS) // draw a circle outline void Adafruit_GFX::drawCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color) { int16_t f = 1 - r; int16_t ddF_x = 1; int16_t ddF_y = -2 * r; int16_t x = 0; int16_t y = r; drawPixel(x0, y0+r, color); drawPixel(x0, y0-r, color); drawPixel(x0+r, y0, color); drawPixel(x0-r, y0, color); while (x<y) { if (f >= 0) { y--; ddF_y += 2; f += ddF_y; } x++; ddF_x += 2; f += ddF_x; drawPixel(x0 + x, y0 + y, color); drawPixel(x0 - x, y0 + y, color); drawPixel(x0 + x, y0 - y, color); drawPixel(x0 - x, y0 - y, color); drawPixel(x0 + y, y0 + x, color); drawPixel(x0 - y, y0 + x, color); drawPixel(x0 + y, y0 - x, color); drawPixel(x0 - y, y0 - x, color); } } void Adafruit_GFX::drawCircleHelper( int16_t x0, int16_t y0, int16_t r, uint8_t cornername, uint16_t color) { int16_t f = 1 - r; int16_t ddF_x = 1; int16_t ddF_y = -2 * r; int16_t x = 0; int16_t y = r; while (x<y) { if (f >= 0) { y--; ddF_y += 2; f += ddF_y; } x++; ddF_x += 2; f += ddF_x; if (cornername & 0x4) { drawPixel(x0 + x, y0 + y, color); drawPixel(x0 + y, y0 + x, color); } if (cornername & 0x2) { drawPixel(x0 + x, y0 - y, color); drawPixel(x0 + y, y0 - x, color); } if (cornername & 0x8) { drawPixel(x0 - y, y0 + x, color); drawPixel(x0 - x, y0 + y, color); } if (cornername & 0x1) { drawPixel(x0 - y, y0 - x, color); drawPixel(x0 - x, y0 - y, color); } } } void Adafruit_GFX::fillCircle(int16_t x0, int16_t y0, int16_t r, uint16_t color) { drawFastVLine(x0, y0-r, 2*r+1, color); fillCircleHelper(x0, y0, r, 3, 0, color); } // used to do circles and roundrects! void Adafruit_GFX::fillCircleHelper(int16_t x0, int16_t y0, int16_t r, uint8_t cornername, int16_t delta, uint16_t color) { int16_t f = 1 - r; int16_t ddF_x = 1; int16_t ddF_y = -2 * r; int16_t x = 0; int16_t y = r; while (x<y) { if (f >= 0) { y--; ddF_y += 2; f += ddF_y; } x++; ddF_x += 2; f += ddF_x; if (cornername & 0x1) { drawFastVLine(x0+x, y0-y, 2*y+1+delta, color); drawFastVLine(x0+y, y0-x, 2*x+1+delta, color); } if (cornername & 0x2) { drawFastVLine(x0-x, y0-y, 2*y+1+delta, color); drawFastVLine(x0-y, y0-x, 2*x+1+delta, color); } } } #endif #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT) // bresenham's algorithm - thx wikpedia void Adafruit_GFX::drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color) { int16_t steep = abs(y1 - y0) > abs(x1 - x0); if (steep) { swap(x0, y0); swap(x1, y1); } if (x0 > x1) { swap(x0, x1); swap(y0, y1); } int16_t dx, dy; dx = x1 - x0; dy = abs(y1 - y0); int16_t err = dx / 2; int16_t ystep; if (y0 < y1) ystep = 1; else ystep = -1; for (; x0<=x1; x0++) { if (steep) drawPixel(y0, x0, color); else drawPixel(x0, y0, color); err -= dy; if (err < 0) { y0 += ystep; err += dx; } } } void Adafruit_GFX::drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color) { // stupidest version - update in subclasses if desired! drawLine(x, y, x, y+h-1, color); } void Adafruit_GFX::fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color) { // stupidest version - update in subclasses if desired! for (int16_t i=x; i<x+w; i++) drawFastVLine(i, y, h, color); } #endif #if defined(GFX_WANT_ABSTRACTS) // draw a rectangle void Adafruit_GFX::drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color) { drawFastHLine(x, y, w, color); drawFastHLine(x, y+h-1, w, color); drawFastVLine(x, y, h, color); drawFastVLine(x+w-1, y, h, color); } void Adafruit_GFX::drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color) { // stupidest version - update in subclasses if desired! drawLine(x, y, x+w-1, y, color); } void Adafruit_GFX::fillScreen(uint16_t color) { fillRect(0, 0, _width, _height, color); } // draw a rounded rectangle! void Adafruit_GFX::drawRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color) { // smarter version drawFastHLine(x+r , y , w-2*r, color); // Top drawFastHLine(x+r , y+h-1, w-2*r, color); // Bottom drawFastVLine( x , y+r , h-2*r, color); // Left drawFastVLine( x+w-1, y+r , h-2*r, color); // Right // draw four corners drawCircleHelper(x+r , y+r , r, 1, color); drawCircleHelper(x+w-r-1, y+r , r, 2, color); drawCircleHelper(x+w-r-1, y+h-r-1, r, 4, color); drawCircleHelper(x+r , y+h-r-1, r, 8, color); } // fill a rounded rectangle! void Adafruit_GFX::fillRoundRect(int16_t x, int16_t y, int16_t w, int16_t h, int16_t r, uint16_t color) { // smarter version fillRect(x+r, y, w-2*r, h, color); // draw four corners fillCircleHelper(x+w-r-1, y+r, r, 1, h-2*r-1, color); fillCircleHelper(x+r , y+r, r, 2, h-2*r-1, color); } // draw a triangle! void Adafruit_GFX::drawTriangle(int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color) { drawLine(x0, y0, x1, y1, color); drawLine(x1, y1, x2, y2, color); drawLine(x2, y2, x0, y0, color); } // fill a triangle! void Adafruit_GFX::fillTriangle ( int16_t x0, int16_t y0, int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint16_t color) { int16_t a, b, y, last; // Sort coordinates by Y order (y2 >= y1 >= y0) if (y0 > y1) swap(y0, y1); swap(x0, x1); if (y1 > y2) swap(y2, y1); swap(x2, x1); if (y0 > y1) swap(y0, y1); swap(x0, x1); if(y0 == y2) { // Handle awkward all-on-same-line case as its own thing a = b = x0; if(x1 < a) a = x1; else if(x1 > b) b = x1; if(x2 < a) a = x2; else if(x2 > b) b = x2; drawFastHLine(a, y0, b-a+1, color); return; } int16_t dx01 = x1 - x0, dy01 = y1 - y0, dx02 = x2 - x0, dy02 = y2 - y0, dx12 = x2 - x1, dy12 = y2 - y1, sa = 0, sb = 0; // For upper part of triangle, find scanline crossings for segments // 0-1 and 0-2. If y1=y2 (flat-bottomed triangle), the scanline y1 // is included here (and second loop will be skipped, avoiding a /0 // error there), otherwise scanline y1 is skipped here and handled // in the second loop...which also avoids a /0 error here if y0=y1 // (flat-topped triangle). if(y1 == y2) last = y1; // Include y1 scanline else last = y1-1; // Skip it for(y=y0; y<=last; y++) { a = x0 + sa / dy01; b = x0 + sb / dy02; sa += dx01; sb += dx02; /* longhand: a = x0 + (x1 - x0) * (y - y0) / (y1 - y0); b = x0 + (x2 - x0) * (y - y0) / (y2 - y0); */ if(a > b) swap(a,b); drawFastHLine(a, y, b-a+1, color); } // For lower part of triangle, find scanline crossings for segments // 0-2 and 1-2. This loop is skipped if y1=y2. sa = dx12 * (y - y1); sb = dx02 * (y - y0); for(; y<=y2; y++) { a = x1 + sa / dy12; b = x0 + sb / dy02; sa += dx12; sb += dx02; /* longhand: a = x1 + (x2 - x1) * (y - y1) / (y2 - y1); b = x0 + (x2 - x0) * (y - y0) / (y2 - y0); */ if(a > b) swap(a,b); drawFastHLine(a, y, b-a+1, color); } } #endif void Adafruit_GFX::drawBitmap(int16_t x, int16_t y, const uint8_t *bitmap, int16_t w, int16_t h, uint16_t color) { for (int16_t j=0; j<h; j++) { for (int16_t i=0; i<w; i++ ) { if (bitmap[i + (j/8)*w] & _BV(j%8)) drawPixel(x+i, y+j, color); } } } size_t Adafruit_GFX::writeChar(uint8_t c) { if (c == '\n') { cursor_y += textsize*8; cursor_x = 0; } else if (c == '\r') cursor_x = 0; else { drawChar(cursor_x, cursor_y, c, textcolor, textbgcolor, textsize); cursor_x += textsize*6; if (wrap && (cursor_x > (_width - textsize*6))) { cursor_y += textsize*8; cursor_x = 0; } } return 1; } // draw a character void Adafruit_GFX::drawChar(int16_t x, int16_t y, unsigned char c, uint16_t color, uint16_t bg, uint8_t size) { if( (x >= _width) || // Clip right (y >= _height) || // Clip bottom ((x + 5 * size - 1) < 0) || // Clip left ((y + 8 * size - 1) < 0) // Clip top ) return; for (int8_t i=0; i<6; i++ ) { uint8_t line = 0; if (i == 5) line = 0x0; else line = font[(c*5)+i]; for (int8_t j = 0; j<8; j++) { if (line & 0x1) { #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT) if (size == 1) // default size drawPixel(x+i, y+j, color); else // big size fillRect(x+(i*size), y+(j*size), size, size, color); #else drawPixel(x+i, y+j, color); #endif } else if (bg != color) { #if defined(GFX_WANT_ABSTRACTS) || defined(GFX_SIZEABLE_TEXT) if (size == 1) // default size drawPixel(x+i, y+j, bg); else // big size fillRect(x+i*size, y+j*size, size, size, bg); #else drawPixel(x+i, y+j, bg); #endif } line >>= 1; } } } void Adafruit_GFX::setRotation(uint8_t x) { x %= 4; // cant be higher than 3 rotation = x; switch (x) { case 0: case 2: _width = _rawWidth; _height = _rawHeight; break; case 1: case 3: _width = _rawHeight; _height = _rawWidth; break; } }