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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. #include "ssd1306_config.h"
  20.  
  21. typedef uint8_t boolean;
  22. static const boolean true = 1;
  23. static const boolean false = 0;
  24.  
  25. #define BLACK  0
  26. #define WHITE  1
  27. #define INVERT 2
  28.  
  29. // this driver can cope with more than one physical display of the same type.
  30.  
  31. #define MAX_PHYS_DISPLAYS 1
  32.  
  33. extern void ssd1306spiInit(void);
  34.  
  35. extern void ssd1306fastSPIwrite(uint8_t d);
  36.  
  37. extern void ssd1306commandSPIwrite(uint8_t c);
  38.  
  39. extern void ssd1306resetDisplay(void);
  40.  
  41. extern void ssd1306SendDisplay(uint8_t * buff, uint8_t len);
  42.  
  43. /*=========================================================================
  44.     SSD1306 Displays
  45.     -----------------------------------------------------------------------
  46.     The driver is used in multiple displays (128x64, 128x32, etc.).
  47.     Select the appropriate display below to create an appropriately
  48.     sized framebuffer, etc.
  49.  
  50.     SSD1306_128_64  128x64 pixel display
  51.  
  52.     SSD1306_128_32  128x32 pixel display
  53.  
  54.     -----------------------------------------------------------------------*/
  55. /*=========================================================================*/
  56.  
  57.  
  58. // the 1106 has a RAM width of 128
  59. #if defined SSD1306_128_64
  60. // 0.9 inch display
  61.   #define SSD1306_LCDWIDTH                 128
  62.   #define SSD1306_LCDHEIGHT                 64
  63.   #define SSD1306_RAMWIDTH                 128
  64. #elif defined SSD1306_132_64
  65. // 1.3 inch display
  66.   #define SSD1306_LCDWIDTH                 128
  67.   #define SSD1306_LCDHEIGHT                 64
  68.   #define SSD1306_RAMWIDTH                 132
  69. #elif defined SSD1306_128_32
  70.   #define SSD1306_LCDWIDTH                 128
  71.   #define SSD1306_LCDHEIGHT                 32
  72.   #define SSD1306_RAMWIDTH                 128
  73. #else
  74.   #error "At least one SSD1306 display must be specified in SSD1306.h"
  75. #endif
  76.  
  77. #define SSD1306_SETCONTRAST 0x81
  78. #define SSD1306_DISPLAYALLON_RESUME 0xA4
  79. #define SSD1306_DISPLAYALLON 0xA5
  80. #define SSD1306_NORMALDISPLAY 0xA6
  81. #define SSD1306_INVERTDISPLAY 0xA7
  82. #define SSD1306_DISPLAYOFF 0xAE
  83. #define SSD1306_DISPLAYON 0xAF
  84.  
  85. #define SSD1306_SETDISPLAYOFFSET 0xD3
  86. #define SSD1306_SETCOMPINS 0xDA
  87.  
  88. #define SSD1306_SETVCOMDETECT 0xDB
  89.  
  90. #define SSD1306_SETDISPLAYCLOCKDIV 0xD5
  91. #define SSD1306_SETPRECHARGE 0xD9
  92.  
  93. #define SSD1306_SETMULTIPLEX 0xA8
  94.  
  95. #define SSD1306_SETLOWCOLUMN 0x00
  96. #define SSD1306_SETHIGHCOLUMN 0x10
  97.  
  98. #define SSD1306_SETSTARTLINE 0x40
  99.  
  100. #define SSD1306_MEMORYMODE 0x20
  101. #define SSD1306_COLUMNADDR 0x21
  102. #define SSD1306_PAGEADDR   0x22
  103.  
  104. #define SSD1306_COMSCANINC 0xC0
  105. #define SSD1306_COMSCANDEC 0xC8
  106.  
  107. #define SSD1306_SEGREMAP 0xA0
  108.  
  109. #define SSD1306_CHARGEPUMP 0x8D
  110.  
  111. #define SSD1306_EXTERNALVCC 0x1
  112. #define SSD1306_SWITCHCAPVCC 0x2
  113.  
  114. // Scrolling #defines
  115. #define SSD1306_ACTIVATE_SCROLL 0x2F
  116. #define SSD1306_DEACTIVATE_SCROLL 0x2E
  117. #define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3
  118. #define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26
  119. #define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27
  120. #define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29
  121. #define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A
  122.  
  123. extern const uint16_t WIDTH;
  124. extern const uint16_t HEIGHT;
  125. extern uint8_t display_buffer[];
  126.  
  127. extern uint8_t getRotation(void);
  128. extern int16_t width(void);
  129. extern int16_t height(void);
  130.  
  131. /* stolen from AdaFruit class and converted to C */
  132. void ssd1306_begin(uint8_t vccstate, uint8_t i2caddr);
  133.  
  134. extern  void clearDisplay(void);
  135. extern  void invertDisplay(uint8_t i);
  136. extern  void display();
  137.  
  138. extern  void startscrollright(uint8_t start, uint8_t stop);
  139. extern  void startscrollleft(uint8_t start, uint8_t stop);
  140.  
  141. extern  void startscrolldiagright(uint8_t start, uint8_t stop);
  142. extern  void startscrolldiagleft(uint8_t start, uint8_t stop);
  143. extern  void stopscroll(void);
  144.  
  145. extern void dim(uint8_t contrast);
  146.  
  147. extern void drawPixel(int16_t x, int16_t y, uint16_t color);
  148.  
  149. extern void drawLine(int16_t x1, int16_t y1, int16_t x2, int16_t y2, uint8_t color);
  150.  
  151. extern  void select_display(int i) ; // select physical display [i]
  152.  
  153. extern  inline uint8_t * display_address(void) ;
  154.