Adafruit_SSD1306.h

00001 /*********************************************************************
00002 This is a library for our Monochrome OLEDs based on SSD1306 drivers
00003 
00004   Pick one up today in the adafruit shop!
00005   ------> http://www.adafruit.com/category/63_98
00006 
00007 These displays use SPI to communicate, 4 or 5 pins are required to  
00008 interface
00009 
00010 Adafruit invests time and resources providing this open source code, 
00011 please support Adafruit and open-source hardware by purchasing 
00012 products from Adafruit!
00013 
00014 Written by Limor Fried/Ladyada  for Adafruit Industries.  
00015 BSD license, check license.txt for more information
00016 All text above, and the splash screen must be included in any redistribution
00017 *********************************************************************/
00018 
00019 /*
00020  *  Modified by Neal Horman 7/14/2012 for use in LPC1768
00021  */
00022 
00023 #ifndef _ADAFRUIT_SSD1306_H_
00024 #define _ADAFRUIT_SSD1306_H_
00025 
00026 #include "mbed.h"
00027 #include "Adafruit_GFX.h"
00028 
00029 /*=========================================================================
00030     SSD1306 Displays
00031     -----------------------------------------------------------------------
00032     The driver is used in multiple displays (128x64, 128x32, etc.).
00033     Select the appropriate display below to create an appropriately
00034     sized framebuffer, etc.
00035 
00036     SSD1306_128_64  128x64 pixel display
00037 
00038     SSD1306_128_32  128x32 pixel display
00039 
00040     You also need to set the LCDWIDTH and LCDHEIGHT defines to an 
00041     appropriate size
00042 
00043     -----------------------------------------------------------------------*/
00044 #define SSD1306_128_64
00045 //#define SSD1306_128_32
00046 /*=========================================================================*/
00047 
00048 #if defined SSD1306_128_64 && defined SSD1306_128_32
00049     #error "Only one SSD1306 display can be specified at once in SSD1306.h"
00050 #endif
00051 #if !defined SSD1306_128_64 && !defined SSD1306_128_32
00052     #error "At least one SSD1306 display must be specified in SSD1306.h"
00053 #endif
00054 
00055 #if defined SSD1306_128_64
00056     #define SSD1306_LCDWIDTH 128
00057     #define SSD1306_LCDHEIGHT 64
00058 #endif
00059 #if defined SSD1306_128_32
00060     #define SSD1306_LCDWIDTH 128
00061     #define SSD1306_LCDHEIGHT 32
00062 #endif
00063 
00064 #define SSD1306_SETCONTRAST 0x81
00065 #define SSD1306_DISPLAYALLON_RESUME 0xA4
00066 #define SSD1306_DISPLAYALLON 0xA5
00067 #define SSD1306_NORMALDISPLAY 0xA6
00068 #define SSD1306_INVERTDISPLAY 0xA7
00069 #define SSD1306_DISPLAYOFF 0xAE
00070 #define SSD1306_DISPLAYON 0xAF
00071 #define SSD1306_SETDISPLAYOFFSET 0xD3
00072 #define SSD1306_SETCOMPINS 0xDA
00073 #define SSD1306_SETVCOMDETECT 0xDB
00074 #define SSD1306_SETDISPLAYCLOCKDIV 0xD5
00075 #define SSD1306_SETPRECHARGE 0xD9
00076 #define SSD1306_SETMULTIPLEX 0xA8
00077 #define SSD1306_SETLOWCOLUMN 0x00
00078 #define SSD1306_SETHIGHCOLUMN 0x10
00079 #define SSD1306_SETSTARTLINE 0x40
00080 #define SSD1306_MEMORYMODE 0x20
00081 #define SSD1306_COMSCANINC 0xC0
00082 #define SSD1306_COMSCANDEC 0xC8
00083 #define SSD1306_SEGREMAP 0xA0
00084 #define SSD1306_CHARGEPUMP 0x8D
00085 #define SSD1306_EXTERNALVCC 0x1
00086 #define SSD1306_SWITCHCAPVCC 0x2
00087 
00088 // an DigitalOut sub-class that provides a constructed default state
00089 class DigitalOut2 : public DigitalOut
00090 {
00091 public:
00092     DigitalOut2(PinName pin, bool active = false) : DigitalOut(pin) { write(active); };
00093     DigitalOut2& operator= (int value) { write(value); return *this; };
00094     DigitalOut2& operator= (DigitalOut2& rhs) { write(rhs.read()); return *this; };
00095     operator int() { return read(); };
00096 };
00097 
00098 class Adafruit_SSD1306 : public Adafruit_GFX
00099 {
00100  public:
00101     Adafruit_SSD1306(SPI &spi, PinName DC, PinName RST, PinName CS);
00102     void begin(uint8_t switchvcc = SSD1306_SWITCHCAPVCC);
00103     void ssd1306_command(uint8_t c);
00104     void ssd1306_data(uint8_t c);
00105     
00106     void clearDisplay(void);
00107     virtual void invertDisplay(bool i);
00108     void display();
00109     
00110     virtual void drawPixel(int16_t x, int16_t y, uint16_t color);
00111     
00112 private:
00113     DigitalOut2 rst,cs,dc;
00114     SPI &mspi;
00115     // the memory buffer for the LCD
00116     uint8_t buffer[SSD1306_LCDHEIGHT * SSD1306_LCDWIDTH / 8];
00117 };
00118 
00119 #endif