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  1. /*********************************************************************
  2. This is a library for our Monochrome OLEDs based on SSD1306 drivers
  3.  
  4.   Pick one up today in the adafruit shop!
  5.   ------> http://www.adafruit.com/category/63_98
  6.  
  7. These displays use SPI to communicate, 4 or 5 pins are required to  
  8. interface
  9.  
  10. Adafruit invests time and resources providing this open source code,
  11. please support Adafruit and open-source hardware by purchasing
  12. products from Adafruit!
  13.  
  14. Written by Limor Fried/Ladyada  for Adafruit Industries.  
  15. BSD license, check license.txt for more information
  16. All text above, and the splash screen must be included in any redistribution
  17. *********************************************************************/
  18.  
  19.  
  20. typedef uint8_t boolean;
  21. static const boolean true = 1;
  22. static const boolean false = 0;
  23.  
  24. #define BLACK  0
  25. #define WHITE  1
  26. #define INVERT 2
  27.  
  28. // this driver can cope with more than one physical display of the same type.
  29.  
  30. #define MAX_PHYS_DISPLAYS 2
  31.  
  32. /*=========================================================================
  33.     SSD1306 Displays
  34.     -----------------------------------------------------------------------
  35.     The driver is used in multiple displays (128x64, 128x32, etc.).
  36.     Select the appropriate display below to create an appropriately
  37.     sized framebuffer, etc.
  38.  
  39.     SSD1306_128_64  128x64 pixel display
  40.  
  41.     SSD1306_128_32  128x32 pixel display
  42.  
  43.     -----------------------------------------------------------------------*/
  44.         #define SSD1306_128_64
  45. /*=========================================================================*/
  46.  
  47. #if defined SSD1306_128_64 && defined SSD1306_128_32
  48.   #error "Only one SSD1306 display can be specified at once in SSD1306.h"
  49. #endif
  50. #if !defined SSD1306_128_64 && !defined SSD1306_128_32
  51.   #error "At least one SSD1306 display must be specified in SSD1306.h"
  52. #endif
  53.  
  54. #if defined SSD1306_128_64
  55.   #define SSD1306_LCDWIDTH                  128
  56.   #define SSD1306_LCDHEIGHT                 64
  57. #endif
  58. #if defined SSD1306_128_32
  59.   #define SSD1306_LCDWIDTH                  128
  60.   #define SSD1306_LCDHEIGHT                 32
  61. #endif
  62.  
  63. #define SSD1306_SETCONTRAST 0x81
  64. #define SSD1306_DISPLAYALLON_RESUME 0xA4
  65. #define SSD1306_DISPLAYALLON 0xA5
  66. #define SSD1306_NORMALDISPLAY 0xA6
  67. #define SSD1306_INVERTDISPLAY 0xA7
  68. #define SSD1306_DISPLAYOFF 0xAE
  69. #define SSD1306_DISPLAYON 0xAF
  70.  
  71. #define SSD1306_SETDISPLAYOFFSET 0xD3
  72. #define SSD1306_SETCOMPINS 0xDA
  73.  
  74. #define SSD1306_SETVCOMDETECT 0xDB
  75.  
  76. #define SSD1306_SETDISPLAYCLOCKDIV 0xD5
  77. #define SSD1306_SETPRECHARGE 0xD9
  78.  
  79. #define SSD1306_SETMULTIPLEX 0xA8
  80.  
  81. #define SSD1306_SETLOWCOLUMN 0x00
  82. #define SSD1306_SETHIGHCOLUMN 0x10
  83.  
  84. #define SSD1306_SETSTARTLINE 0x40
  85.  
  86. #define SSD1306_MEMORYMODE 0x20
  87. #define SSD1306_COLUMNADDR 0x21
  88. #define SSD1306_PAGEADDR   0x22
  89.  
  90. #define SSD1306_COMSCANINC 0xC0
  91. #define SSD1306_COMSCANDEC 0xC8
  92.  
  93. #define SSD1306_SEGREMAP 0xA0
  94.  
  95. #define SSD1306_CHARGEPUMP 0x8D
  96.  
  97. #define SSD1306_EXTERNALVCC 0x1
  98. #define SSD1306_SWITCHCAPVCC 0x2
  99.  
  100. // Scrolling #defines
  101. #define SSD1306_ACTIVATE_SCROLL 0x2F
  102. #define SSD1306_DEACTIVATE_SCROLL 0x2E
  103. #define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
  104. #define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
  105. #define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
  106. #define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
  107. #define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A
  108.  
  109.  
  110. extern const uint16_t WIDTH;
  111. extern const uint16_t HEIGHT;
  112. extern uint8_t display_buffer[MAX_PHYS_DISPLAYS][SSD1306_LCDHEIGHT * SSD1306_LCDWIDTH / 8];
  113.  
  114. extern inline uint8_t getRotation(void);
  115. extern inline int16_t width(void);
  116. extern inline int16_t height(void);
  117.  
  118. extern inline void fastSPIwrite(uint8_t d);
  119.  
  120.  
  121. /* stolen from AdaFruit class and converted to C */
  122. void ssd1306_begin(uint8_t vccstate, uint8_t i2caddr);
  123. extern  void ssd1306_command(uint8_t c);
  124. extern  void ssd1306_data(uint8_t c);
  125.  
  126. extern  void clearDisplay(void);
  127. extern  void invertDisplay(uint8_t i);
  128. extern  void display();
  129.  
  130. extern  void startscrollright(uint8_t start, uint8_t stop);
  131. extern  void startscrollleft(uint8_t start, uint8_t stop);
  132.  
  133. extern  void startscrolldiagright(uint8_t start, uint8_t stop);
  134. extern  void startscrolldiagleft(uint8_t start, uint8_t stop);
  135. extern  void stopscroll(void);
  136.  
  137. extern void dim(uint8_t contrast);
  138.  
  139.  extern inline void drawPixel(int16_t x, int16_t y, uint16_t color);
  140.  
  141.   void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
  142.   void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
  143.  
  144.  
  145.   inline void drawFastVLineInternal(int16_t x, int16_t y, int16_t h, uint16_t color) __attribute__((always_inline));
  146.   inline void drawFastHLineInternal(int16_t x, int16_t y, int16_t w, uint16_t color) __attribute__((always_inline));
  147.  
  148.  
  149.   extern void drawLine(int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint8_t color);
  150.  
  151.  
  152.   extern  void select_display(int i) ; // select physical display [i]
  153.  
  154.   extern  inline uint8_t * display_address(void) ;
  155.