Adafruit_SSD1306.cpp

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 below must be included in any redistribution
00017 *********************************************************************/
00018 
00019 /*
00020  *  Modified by Neal Horman 7/14/2012 for use in mbed
00021  */
00022 
00023 #include "mbed.h"
00024 #include "Adafruit_SSD1306.h"
00025 
00026 #define SSD1306_SETCONTRAST 0x81
00027 #define SSD1306_DISPLAYALLON_RESUME 0xA4
00028 #define SSD1306_DISPLAYALLON 0xA5
00029 #define SSD1306_NORMALDISPLAY 0xA6
00030 #define SSD1306_INVERTDISPLAY 0xA7
00031 #define SSD1306_DISPLAYOFF 0xAE
00032 #define SSD1306_DISPLAYON 0xAF
00033 #define SSD1306_SETDISPLAYOFFSET 0xD3
00034 #define SSD1306_SETCOMPINS 0xDA
00035 #define SSD1306_SETVCOMDETECT 0xDB
00036 #define SSD1306_SETDISPLAYCLOCKDIV 0xD5
00037 #define SSD1306_SETPRECHARGE 0xD9
00038 #define SSD1306_SETMULTIPLEX 0xA8
00039 #define SSD1306_SETLOWCOLUMN 0x00
00040 #define SSD1306_SETHIGHCOLUMN 0x10
00041 #define SSD1306_SETSTARTLINE 0x40
00042 #define SSD1306_MEMORYMODE 0x20
00043 #define SSD1306_COMSCANINC 0xC0
00044 #define SSD1306_COMSCANDEC 0xC8
00045 #define SSD1306_SEGREMAP 0xA0
00046 #define SSD1306_CHARGEPUMP 0x8D
00047 
00048 void Adafruit_SSD1306::begin(uint8_t vccstate)
00049 {
00050     rst = 1;
00051     // VDD (3.3V) goes high at start, lets just chill for a ms
00052     wait_ms(1);
00053     // bring reset low
00054     rst = 0;
00055     // wait 10ms
00056     wait_ms(10);
00057     // bring out of reset (enable power)
00058     rst = 1;
00059     // wait 10ms (wait for power to settle)
00060     wait_ms(10);
00061     // turn on VCC (9V?)
00062 
00063     command(SSD1306_DISPLAYOFF);
00064     command(SSD1306_SETDISPLAYCLOCKDIV);
00065     command(0x80);                                  // the suggested ratio 0x80
00066 
00067     command(SSD1306_SETMULTIPLEX);
00068     command(_rawHeight-1);
00069 
00070     command(SSD1306_SETDISPLAYOFFSET);
00071     command(0x0);                                   // no offset
00072 
00073     command(SSD1306_SETSTARTLINE | 0x0);            // line #0
00074 
00075     command(SSD1306_CHARGEPUMP);
00076     command((vccstate == SSD1306_EXTERNALVCC) ? 0x10 : 0x14);
00077 
00078     command(SSD1306_MEMORYMODE);
00079     command(0x00);                                  // 0x0 act like ks0108
00080 
00081     command(SSD1306_SEGREMAP | 0x1);
00082 
00083     command(SSD1306_COMSCANDEC);
00084 
00085     command(SSD1306_SETCOMPINS);
00086     command(_rawHeight == 32 ? 0x02 : 0x12);        // TODO - calculate based on _rawHieght ?
00087 
00088     command(SSD1306_SETCONTRAST);
00089     command(_rawHeight == 32 ? 0x8F : ((vccstate == SSD1306_EXTERNALVCC) ? 0x9F : 0xCF) );
00090 
00091     command(SSD1306_SETPRECHARGE);
00092     command((vccstate == SSD1306_EXTERNALVCC) ? 0x22 : 0xF1);
00093 
00094     command(SSD1306_SETVCOMDETECT);
00095     command(0x40);
00096 
00097     command(SSD1306_DISPLAYALLON_RESUME);
00098 
00099     command(SSD1306_NORMALDISPLAY);
00100     
00101     command(SSD1306_DISPLAYON);
00102 }
00103 
00104 // Set a single pixel
00105 void Adafruit_SSD1306::drawPixel(int16_t x, int16_t y, uint16_t color)
00106 {
00107     if ((x < 0) || (x >= width()) || (y < 0) || (y >= height()))
00108         return;
00109     
00110     // check rotation, move pixel around if necessary
00111     switch (getRotation())
00112     {
00113         case 1:
00114             swap(x, y);
00115             x = _rawWidth - x - 1;
00116             break;
00117         case 2:
00118             x = _rawWidth - x - 1;
00119             y = _rawHeight - y - 1;
00120             break;
00121         case 3:
00122             swap(x, y);
00123             y = _rawHeight - y - 1;
00124             break;
00125     }  
00126     
00127     // x is which column
00128     if (color == WHITE) 
00129         buffer[x+ (y/8)*_rawWidth] |= _BV((y%8));  
00130     else // else black
00131         buffer[x+ (y/8)*_rawWidth] &= ~_BV((y%8)); 
00132 }
00133 
00134 void Adafruit_SSD1306::invertDisplay(bool i)
00135 {
00136     command(i ? SSD1306_INVERTDISPLAY : SSD1306_NORMALDISPLAY);
00137 }
00138 
00139 // Send the display buffer out to the display
00140 void Adafruit_SSD1306::display(void)
00141 {
00142     command(SSD1306_SETLOWCOLUMN | 0x0);  // low col = 0
00143     command(SSD1306_SETHIGHCOLUMN | 0x0);  // hi col = 0
00144     command(SSD1306_SETSTARTLINE | 0x0); // line #0
00145     sendDisplayBuffer();
00146 }
00147 
00148 // Clear the display buffer. Requires a display() call at some point afterwards
00149 void Adafruit_SSD1306::clearDisplay(void)
00150 {
00151     std::fill(buffer.begin(),buffer.end(),0);
00152 }
00153 
00154 void Adafruit_SSD1306::splash(void)
00155 {
00156 #ifndef NO_SPLASH_ADAFRUIT
00157     uint8_t adaFruitLogo[64 * 128 / 8] =
00158     { 
00159         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00160         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00161         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00162         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80,
00163         0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00164         0x00, 0x80, 0x80, 0xC0, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00165         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00166         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00167         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00168         0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xF8, 0xE0, 0x00, 0x00, 0x00, 0x00,
00169         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80,
00170         0x80, 0x80, 0x00, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x80, 0x00, 0xFF,
00171         0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x80, 0x80, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00,
00172         0x80, 0xFF, 0xFF, 0x80, 0x80, 0x00, 0x80, 0x80, 0x00, 0x80, 0x80, 0x80, 0x80, 0x00, 0x80, 0x80,
00173         0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0x80, 0x00, 0x00, 0x8C, 0x8E, 0x84, 0x00, 0x00, 0x80, 0xF8,
00174         0xF8, 0xF8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00175         0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xE0, 0xE0, 0xC0, 0x80,
00176         0x00, 0xE0, 0xFC, 0xFE, 0xFF, 0xFF, 0xFF, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00,
00177         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFF, 0xC7, 0x01, 0x01,
00178         0x01, 0x01, 0x83, 0xFF, 0xFF, 0x00, 0x00, 0x7C, 0xFE, 0xC7, 0x01, 0x01, 0x01, 0x01, 0x83, 0xFF,
00179         0xFF, 0xFF, 0x00, 0x38, 0xFE, 0xC7, 0x83, 0x01, 0x01, 0x01, 0x83, 0xC7, 0xFF, 0xFF, 0x00, 0x00,
00180         0x01, 0xFF, 0xFF, 0x01, 0x01, 0x00, 0xFF, 0xFF, 0x07, 0x01, 0x01, 0x01, 0x00, 0x00, 0x7F, 0xFF,
00181         0x80, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x7F, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x01, 0xFF,
00182         0xFF, 0xFF, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00183         0x03, 0x0F, 0x3F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE7, 0xC7, 0xC7, 0x8F,
00184         0x8F, 0x9F, 0xBF, 0xFF, 0xFF, 0xC3, 0xC0, 0xF0, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xFC, 0xFC,
00185         0xFC, 0xFC, 0xFC, 0xFC, 0xFC, 0xF8, 0xF8, 0xF0, 0xF0, 0xE0, 0xC0, 0x00, 0x01, 0x03, 0x03, 0x03,
00186         0x03, 0x03, 0x01, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01,
00187         0x03, 0x01, 0x00, 0x00, 0x00, 0x01, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01, 0x03, 0x03, 0x00, 0x00,
00188         0x00, 0x03, 0x03, 0x00, 0x00, 0x00, 0x03, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
00189         0x03, 0x03, 0x03, 0x03, 0x03, 0x01, 0x00, 0x00, 0x00, 0x01, 0x03, 0x01, 0x00, 0x00, 0x00, 0x03,
00190         0x03, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00191         // 128x32^^^  128x64vvv
00192         0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF0, 0xF9, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x3F, 0x1F, 0x0F,
00193         0x87, 0xC7, 0xF7, 0xFF, 0xFF, 0x1F, 0x1F, 0x3D, 0xFC, 0xF8, 0xF8, 0xF8, 0xF8, 0x7C, 0x7D, 0xFF,
00194         0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x0F, 0x07, 0x00, 0x30, 0x30, 0x00, 0x00,
00195         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00196         0x00, 0x00, 0x00, 0x00, 0xFE, 0xFE, 0xFC, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00197         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xE0, 0xC0, 0x00,
00198         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0x00, 0x00, 0x00,
00199         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00200         0x00, 0xC0, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x7F, 0x3F, 0x1F,
00201         0x0F, 0x07, 0x1F, 0x7F, 0xFF, 0xFF, 0xF8, 0xF8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0xF8, 0xE0,
00202         0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00,
00203         0x00, 0xFC, 0xFE, 0xFC, 0x0C, 0x06, 0x06, 0x0E, 0xFC, 0xF8, 0x00, 0x00, 0xF0, 0xF8, 0x1C, 0x0E,
00204         0x06, 0x06, 0x06, 0x0C, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00, 0x00, 0x00, 0xFC,
00205         0xFE, 0xFC, 0x00, 0x18, 0x3C, 0x7E, 0x66, 0xE6, 0xCE, 0x84, 0x00, 0x00, 0x06, 0xFF, 0xFF, 0x06,
00206         0x06, 0xFC, 0xFE, 0xFC, 0x0C, 0x06, 0x06, 0x06, 0x00, 0x00, 0xFE, 0xFE, 0x00, 0x00, 0xC0, 0xF8,
00207         0xFC, 0x4E, 0x46, 0x46, 0x46, 0x4E, 0x7C, 0x78, 0x40, 0x18, 0x3C, 0x76, 0xE6, 0xCE, 0xCC, 0x80,
00208         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00209         0x00, 0x00, 0x00, 0x00, 0x01, 0x07, 0x0F, 0x1F, 0x1F, 0x3F, 0x3F, 0x3F, 0x3F, 0x1F, 0x0F, 0x03,
00210         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00,
00211         0x00, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x03, 0x07, 0x0E, 0x0C,
00212         0x18, 0x18, 0x0C, 0x06, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x01, 0x0F, 0x0E, 0x0C, 0x18, 0x0C, 0x0F,
00213         0x07, 0x01, 0x00, 0x04, 0x0E, 0x0C, 0x18, 0x0C, 0x0F, 0x07, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00,
00214         0x00, 0x0F, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00, 0x00, 0x00, 0x07,
00215         0x07, 0x0C, 0x0C, 0x18, 0x1C, 0x0C, 0x06, 0x06, 0x00, 0x04, 0x0E, 0x0C, 0x18, 0x0C, 0x0F, 0x07,
00216         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00217         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00218         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00219         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00220         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00221         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00222         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
00223         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
00224     };
00225     
00226     std::copy(
00227         &adaFruitLogo[0]
00228         , &adaFruitLogo[0] + (_rawHeight == 32 ? sizeof(adaFruitLogo)/2 : sizeof(adaFruitLogo))
00229         , buffer.begin()
00230         );
00231 #endif
00232 }