File content as of revision 0:e8e869596683:

/*************************************************** 
  This is a library for the 0.96" 16-bit Color OLED with SSD1331 driver chip
  Pick one up today in the adafruit shop!
  ------> http://www.adafruit.com/products/684
  These displays use SPI to communicate, 4 or 5 pins are required to  
  interface
  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, all text above must be included in any redistribution
 ****************************************************/
 
#include <stddef.h>
#include "mbed.h"
#include "Adafruit_GFX.h"

#define gfx_swap(a, b) { uint16_t t = a; a = b; b = t; }

#ifdef __SAM3X8E__
typedef volatile RwReg PortReg;
typedef uint32_t PortMask;
#define _BV(b) (1<<(b))
#else
typedef volatile uint8_t PortReg;
typedef uint8_t PortMask;
#endif

// Select one of these defines to set the pixel color order
#define SSD1331_COLORORDER_RGB
// #define SSD1331_COLORORDER_BGR

#if defined SSD1331_COLORORDER_RGB && defined SSD1331_COLORORDER_BGR
  #error "RGB and BGR can not both be defined for SSD1331_COLORODER."
#endif

// Timing Delays
#define SSD1331_DELAYS_HWFILL       (1)
#define SSD1331_DELAYS_HWLINE       (0)
#define SSD1331_DELAYS_HWCLEAR      (1)

// SSD1331 Commands
#define SSD1331_CMD_DRAWLINE        0x21
#define SSD1331_CMD_DRAWRECT        0x22
#define SSD1331_CMD_FILL            0x26
#define SSD1331_CMD_SETCOLUMN       0x15
#define SSD1331_CMD_SETROW          0x75
#define SSD1331_CMD_CONTRASTA       0x81
#define SSD1331_CMD_CONTRASTB       0x82
#define SSD1331_CMD_CONTRASTC       0x83
#define SSD1331_CMD_MASTERCURRENT   0x87
#define SSD1331_CMD_SETREMAP        0xA0
#define SSD1331_CMD_STARTLINE       0xA1
#define SSD1331_CMD_DISPLAYOFFSET   0xA2
#define SSD1331_CMD_NORMALDISPLAY   0xA4
#define SSD1331_CMD_DISPLAYALLON    0xA5
#define SSD1331_CMD_DISPLAYALLOFF   0xA6
#define SSD1331_CMD_INVERTDISPLAY   0xA7
#define SSD1331_CMD_SETMULTIPLEX    0xA8
#define SSD1331_CMD_SETMASTER       0xAD
#define SSD1331_CMD_DISPLAYOFF      0xAE
#define SSD1331_CMD_DISPLAYON       0xAF
#define SSD1331_CMD_POWERMODE       0xB0
#define SSD1331_CMD_PRECHARGE       0xB1
#define SSD1331_CMD_CLOCKDIV        0xB3
#define SSD1331_CMD_PRECHARGEA      0x8A
#define SSD1331_CMD_PRECHARGEB      0x8B
#define SSD1331_CMD_PRECHARGEC      0x8C
#define SSD1331_CMD_PRECHARGELEVEL  0xBB
#define SSD1331_CMD_VCOMH           0xBE
#define WIDTH                       96
#define HEIGHT                      64

#define SSD1331_CMD_CLEAR           0x25

class Adafruit_SSD1331 : public Adafruit_GFX {
 public:
  Adafruit_SSD1331(PinName cs, PinName rs, PinName dc, PinName mosi, PinName miso, PinName sclk);

  uint16_t Color565(uint8_t r, uint8_t g, uint8_t b);

  // drawing primitives!
  void drawPixel(int16_t x, int16_t y, uint16_t color);
  void drawLine(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
  void drawRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color);
  void fillRect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t fillcolor);
  void clearScreen();
  void clearArea(int16_t x0, int16_t y0, int16_t x1, int16_t y1);
  void pushColor(uint16_t c);

  // commands
  void begin(void);
  void goHome(void);
  void goTo(int x, int y);

  void reset(void);

  /* low level */

  void writeData(uint8_t d);
  void writeCommand(uint8_t c);

  static const int16_t TFTWIDTH = 96;
  static const int16_t TFTHEIGHT = 64;
  
  uint8_t cursorX, cursorY;

  void writeData_unsafe(uint16_t d);

  void setWriteDir(void);
  void write8(uint8_t d);

 private:
  void spiwrite(uint8_t);

  DigitalOut  CS,  RES,  DC;
  SPI spi; // mosi, miso, sclk
};