Adafruit_SSD1306.h

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#ifndef _Adafruit_SSD1306_H_
#define _Adafruit_SSD1306_H_

// ONE of the following three lines must be #defined:
//#define SSD1306_128_64 ///< DEPRECTAED: old way to specify 128x64 screen
#define SSD1306_128_32 
//#define SSD1306_96_16  
// This establishes the screen dimensions in old Adafruit_SSD1306 sketches
// (NEW CODE SHOULD IGNORE THIS, USE THE CONSTRUCTORS THAT ACCEPT WIDTH
// AND HEIGHT ARGUMENTS).

// Uncomment to disable Adafruit splash logo
//#define SSD1306_NO_SPLASH

#if defined(ARDUINO_STM32_FEATHER)
typedef class HardwareSPI SPIClass;
#endif

#include <Adafruit_GFX.h>
#include <SPI.h>
#include <Wire.h>

#if defined(__AVR__)
typedef volatile uint8_t PortReg;
typedef uint8_t PortMask;
#define HAVE_PORTREG
#elif defined(__SAM3X8E__)
typedef volatile RwReg PortReg;
typedef uint32_t PortMask;
#define HAVE_PORTREG
#elif defined(ARDUINO_ARCH_RTTHREAD)
#undef HAVE_PORTREG
#elif (defined(__arm__) || defined(ARDUINO_FEATHER52)) &&                      \
    !defined(ARDUINO_ARCH_MBED) && !defined(ARDUINO_ARCH_RP2040)
typedef volatile uint32_t PortReg;
typedef uint32_t PortMask;
#define HAVE_PORTREG
#endif

#ifndef NO_ADAFRUIT_SSD1306_COLOR_COMPATIBILITY
#define BLACK SSD1306_BLACK     
#define WHITE SSD1306_WHITE     
#define INVERSE SSD1306_INVERSE 
#endif
#define SSD1306_BLACK 0   
#define SSD1306_WHITE 1   
#define SSD1306_INVERSE 2 

#define SSD1306_MEMORYMODE 0x20          
#define SSD1306_COLUMNADDR 0x21          
#define SSD1306_PAGEADDR 0x22            
#define SSD1306_SETCONTRAST 0x81         
#define SSD1306_CHARGEPUMP 0x8D          
#define SSD1306_SEGREMAP 0xA0            
#define SSD1306_DISPLAYALLON_RESUME 0xA4 
#define SSD1306_DISPLAYALLON 0xA5        
#define SSD1306_NORMALDISPLAY 0xA6       
#define SSD1306_INVERTDISPLAY 0xA7       
#define SSD1306_SETMULTIPLEX 0xA8        
#define SSD1306_DISPLAYOFF 0xAE          
#define SSD1306_DISPLAYON 0xAF           
#define SSD1306_COMSCANINC 0xC0          
#define SSD1306_COMSCANDEC 0xC8          
#define SSD1306_SETDISPLAYOFFSET 0xD3    
#define SSD1306_SETDISPLAYCLOCKDIV 0xD5  
#define SSD1306_SETPRECHARGE 0xD9        
#define SSD1306_SETCOMPINS 0xDA          
#define SSD1306_SETVCOMDETECT 0xDB       

#define SSD1306_SETLOWCOLUMN 0x00  
#define SSD1306_SETHIGHCOLUMN 0x10 
#define SSD1306_SETSTARTLINE 0x40  

#define SSD1306_EXTERNALVCC 0x01  
#define SSD1306_SWITCHCAPVCC 0x02 

#define SSD1306_RIGHT_HORIZONTAL_SCROLL 0x26              
#define SSD1306_LEFT_HORIZONTAL_SCROLL 0x27               
#define SSD1306_VERTICAL_AND_RIGHT_HORIZONTAL_SCROLL 0x29 
#define SSD1306_VERTICAL_AND_LEFT_HORIZONTAL_SCROLL 0x2A  
#define SSD1306_DEACTIVATE_SCROLL 0x2E                    
#define SSD1306_ACTIVATE_SCROLL 0x2F                      
#define SSD1306_SET_VERTICAL_SCROLL_AREA 0xA3             

// Deprecated size stuff for backwards compatibility with old sketches
#if defined SSD1306_128_64
#define SSD1306_LCDWIDTH 128 
#define SSD1306_LCDHEIGHT 64 
#endif
#if defined SSD1306_128_32
#define SSD1306_LCDWIDTH 128 
#define SSD1306_LCDHEIGHT 32 
#endif
#if defined SSD1306_96_16
#define SSD1306_LCDWIDTH 96  
#define SSD1306_LCDHEIGHT 16 
#endif

class Adafruit_SSD1306 : public Adafruit_GFX {
public:
  // NEW CONSTRUCTORS -- recommended for new projects
  Adafruit_SSD1306(uint8_t w, uint8_t h, TwoWire *twi = &Wire,
                   int8_t rst_pin = -1, uint32_t clkDuring = 400000UL,
                   uint32_t clkAfter = 100000UL);
  Adafruit_SSD1306(uint8_t w, uint8_t h, int8_t mosi_pin, int8_t sclk_pin,
                   int8_t dc_pin, int8_t rst_pin, int8_t cs_pin);
  Adafruit_SSD1306(uint8_t w, uint8_t h, SPIClass *spi, int8_t dc_pin,
                   int8_t rst_pin, int8_t cs_pin, uint32_t bitrate = 8000000UL);

  // DEPRECATED CONSTRUCTORS - for back compatibility, avoid in new projects
  Adafruit_SSD1306(int8_t mosi_pin, int8_t sclk_pin, int8_t dc_pin,
                   int8_t rst_pin, int8_t cs_pin);
  Adafruit_SSD1306(int8_t dc_pin, int8_t rst_pin, int8_t cs_pin);
  Adafruit_SSD1306(int8_t rst_pin = -1);

  ~Adafruit_SSD1306(void);

  bool begin(uint8_t switchvcc = SSD1306_SWITCHCAPVCC, uint8_t i2caddr = 0,
             bool reset = true, bool periphBegin = true);
  void display(void);
  void clearDisplay(void);
  void invertDisplay(bool i);
  void dim(bool dim);
  void drawPixel(int16_t x, int16_t y, uint16_t color);
  virtual void drawFastHLine(int16_t x, int16_t y, int16_t w, uint16_t color);
  virtual void drawFastVLine(int16_t x, int16_t y, int16_t h, uint16_t color);
  void startscrollright(uint8_t start, uint8_t stop);
  void startscrollleft(uint8_t start, uint8_t stop);
  void startscrolldiagright(uint8_t start, uint8_t stop);
  void startscrolldiagleft(uint8_t start, uint8_t stop);
  void stopscroll(void);
  void ssd1306_command(uint8_t c);
  bool getPixel(int16_t x, int16_t y);
  uint8_t *getBuffer(void);

protected:
  inline void SPIwrite(uint8_t d) __attribute__((always_inline));
  void drawFastHLineInternal(int16_t x, int16_t y, int16_t w, uint16_t color);
  void drawFastVLineInternal(int16_t x, int16_t y, int16_t h, uint16_t color);
  void ssd1306_command1(uint8_t c);
  void ssd1306_commandList(const uint8_t *c, uint8_t n);

  SPIClass *spi;   
  TwoWire *wire;   
  uint8_t *buffer; 
  int8_t i2caddr;  
  int8_t vccstate; 
  int8_t page_end; 
  int8_t mosiPin;  
  int8_t clkPin;   
  int8_t dcPin;    
  int8_t
      csPin; 
  int8_t rstPin; 

#ifdef HAVE_PORTREG
  PortReg *mosiPort, *clkPort, *dcPort, *csPort;
  PortMask mosiPinMask, clkPinMask, dcPinMask, csPinMask;
#endif
#if ARDUINO >= 157
  uint32_t wireClk;    
  uint32_t restoreClk; 
#endif
  uint8_t contrast; 
#if defined(SPI_HAS_TRANSACTION)
protected:
  // Allow sub-class to change
  SPISettings spiSettings;
#endif
};

#endif // _Adafruit_SSD1306_H_