First init.

libraries/Adafruit_SH110X/Adafruit_SH110X.h

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+/*!
+ * @file Adafruit_SH110X.h
+ *
+ * This is part of for Adafruit's SH110X library for monochrome
+ * OLED displays: http://www.adafruit.com/category/63_98
+ *
+ * These displays use I2C or SPI to communicate. I2C requires 2 pins
+ * (SCL+SDA) and optionally a RESET pin. SPI requires 4 pins (MOSI, SCK,
+ * select, data/command) and optionally a reset pin. Hardware SPI or
+ * 'bitbang' software SPI are both supported.
+ *
+ * Adafruit invests time and resources providing this open source code,
+ * please support Adafruit and open-source hardware by purchasing
+ * products from Adafruit!
+ *
+ * Written by Limor Fried/Ladyada for Adafruit Industries, with
+ * contributions from the open source community.
+ *
+ * BSD license, all text above, and the splash screen header file,
+ * must be included in any redistribution.
+ *
+ */
+
+#ifndef _Adafruit_SH110X_H_
+#define _Adafruit_SH110X_H_
+
+#include <Adafruit_GrayOLED.h>
+
+/// fit into the SH110X_ naming scheme
+#define SH110X_BLACK 0   ///< Draw 'off' pixels
+#define SH110X_WHITE 1   ///< Draw 'on' pixels
+#define SH110X_INVERSE 2 ///< Invert pixels
+
+// Uncomment to disable Adafruit splash logo
+//#define SH110X_NO_SPLASH
+
+#define SH110X_MEMORYMODE 0x20          ///< See datasheet
+#define SH110X_COLUMNADDR 0x21          ///< See datasheet
+#define SH110X_PAGEADDR 0x22            ///< See datasheet
+#define SH110X_SETCONTRAST 0x81         ///< See datasheet
+#define SH110X_CHARGEPUMP 0x8D          ///< See datasheet
+#define SH110X_SEGREMAP 0xA0            ///< See datasheet
+#define SH110X_DISPLAYALLON_RESUME 0xA4 ///< See datasheet
+#define SH110X_DISPLAYALLON 0xA5        ///< Not currently used
+#define SH110X_NORMALDISPLAY 0xA6       ///< See datasheet
+#define SH110X_INVERTDISPLAY 0xA7       ///< See datasheet
+#define SH110X_SETMULTIPLEX 0xA8        ///< See datasheet
+#define SH110X_DCDC 0xAD                ///< See datasheet
+#define SH110X_DISPLAYOFF 0xAE          ///< See datasheet
+#define SH110X_DISPLAYON 0xAF           ///< See datasheet
+#define SH110X_SETPAGEADDR                                                     \
+  0xB0 ///< Specify page address to load display RAM data to page address
+       ///< register
+#define SH110X_COMSCANINC 0xC0         ///< Not currently used
+#define SH110X_COMSCANDEC 0xC8         ///< See datasheet
+#define SH110X_SETDISPLAYOFFSET 0xD3   ///< See datasheet
+#define SH110X_SETDISPLAYCLOCKDIV 0xD5 ///< See datasheet
+#define SH110X_SETPRECHARGE 0xD9       ///< See datasheet
+#define SH110X_SETCOMPINS 0xDA         ///< See datasheet
+#define SH110X_SETVCOMDETECT 0xDB      ///< See datasheet
+#define SH110X_SETDISPSTARTLINE                                                \
+  0xDC ///< Specify Column address to determine the initial display line or
+       ///< COM0.
+
+#define SH110X_SETLOWCOLUMN 0x00  ///< Not currently used
+#define SH110X_SETHIGHCOLUMN 0x10 ///< Not currently used
+#define SH110X_SETSTARTLINE 0x40  ///< See datasheet
+
+/*!
+    @brief  Class that stores state and functions for interacting with
+            SH110X OLED displays. Not instantiatable - use a subclass!
+*/
+class Adafruit_SH110X : public Adafruit_GrayOLED {
+public:
+  // NEW CONSTRUCTORS -- recommended for new projects
+  Adafruit_SH110X(uint16_t w, uint16_t h, TwoWire *twi = &Wire,
+                  int8_t rst_pin = -1, uint32_t preclk = 400000,
+                  uint32_t postclk = 100000);
+  Adafruit_SH110X(uint16_t w, uint16_t h, int8_t mosi_pin, int8_t sclk_pin,
+                  int8_t dc_pin, int8_t rst_pin, int8_t cs_pin);
+  Adafruit_SH110X(uint16_t w, uint16_t h, SPIClass *spi, int8_t dc_pin,
+                  int8_t rst_pin, int8_t cs_pin, uint32_t bitrate = 8000000UL);
+
+  virtual ~Adafruit_SH110X(void) = 0;
+
+  void display(void);
+
+protected:
+  /*! some displays are 'inset' in memory, so we have to skip some memory to
+   * display */
+  uint8_t _page_start_offset = 0;
+
+private:
+};
+
+/*!
+    @brief  Class that stores state and functions for interacting with
+            SH1106G OLED displays.
+*/
+class Adafruit_SH1106G : public Adafruit_SH110X {
+public:
+  Adafruit_SH1106G(uint16_t w, uint16_t h, TwoWire *twi = &Wire,
+                   int8_t rst_pin = -1, uint32_t preclk = 400000,
+                   uint32_t postclk = 100000);
+  Adafruit_SH1106G(uint16_t w, uint16_t h, int8_t mosi_pin, int8_t sclk_pin,
+                   int8_t dc_pin, int8_t rst_pin, int8_t cs_pin);
+  Adafruit_SH1106G(uint16_t w, uint16_t h, SPIClass *spi, int8_t dc_pin,
+                   int8_t rst_pin, int8_t cs_pin, uint32_t bitrate = 8000000UL);
+
+  ~Adafruit_SH1106G(void);
+
+  bool begin(uint8_t i2caddr = 0x3C, bool reset = true);
+};
+
+/*!
+    @brief  Class that stores state and functions for interacting with
+            SH1107 OLED displays.
+*/
+class Adafruit_SH1107 : public Adafruit_SH110X {
+public:
+  Adafruit_SH1107(uint16_t w, uint16_t h, TwoWire *twi = &Wire,
+                  int8_t rst_pin = -1, uint32_t preclk = 400000,
+                  uint32_t postclk = 100000);
+  Adafruit_SH1107(uint16_t w, uint16_t h, int8_t mosi_pin, int8_t sclk_pin,
+                  int8_t dc_pin, int8_t rst_pin, int8_t cs_pin);
+  Adafruit_SH1107(uint16_t w, uint16_t h, SPIClass *spi, int8_t dc_pin,
+                  int8_t rst_pin, int8_t cs_pin, uint32_t bitrate = 8000000UL);
+
+  ~Adafruit_SH1107(void);
+
+  bool begin(uint8_t i2caddr = 0x3C, bool reset = true);
+};
+#endif // _Adafruit_SH110X_H_