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diff --git a/source/sharp/Adafruit_SharpMem.h b/source/sharp/Adafruit_SharpMem.h
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+/*********************************************************************
+This is an Arduino library for our Monochrome SHARP Memory Displays
+
+  Pick one up today in the adafruit shop!
+  ------> http://www.adafruit.com/products/1393
+
+These displays use SPI to communicate, 3 pins are required to  
+interface
+
+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.  
+BSD license, check license.txt for more information
+All text above, and the splash screen must be included in any redistribution
+*********************************************************************/
+
+#if ARDUINO >= 100
+ #include "Arduino.h"
+#else
+ #include "WProgram.h"
+#endif
+
+#if defined(RAMSTART) && defined(RAMEND) && ((RAMEND-RAMSTART) < 4096)
+  #warning "Display may not work on devices with less than 4K RAM"
+#endif
+ 
+#include <Adafruit_GFX.h>
+#ifdef __AVR
+  #include <avr/pgmspace.h>
+#elif defined(ESP8266)
+  #include <pgmspace.h>
+#endif
+
+#if defined(ARDUINO_STM32_FEATHER)
+  typedef volatile uint32 RwReg;
+  //#define USE_FAST_PINIO
+#elif defined(ARDUINO_FEATHER52) || defined (ESP8266) || defined (ESP32) || defined(__SAM3X8E__) || defined(ARDUINO_ARCH_SAMD)
+  typedef volatile uint32_t RwReg;
+  #define USE_FAST_PINIO  // tested!
+#elif defined (__AVR__) || defined(TEENSYDUINO)
+  typedef volatile uint8_t RwReg;
+  #define USE_FAST_PINIO
+#else
+  #undef USE_FAST_PINIO  
+#endif
+
+
+class Adafruit_SharpMem : public Adafruit_GFX {
+ public:
+  Adafruit_SharpMem(uint8_t clk, uint8_t mosi, uint8_t ss, uint16_t w = 96, uint16_t h = 96);
+  boolean begin();
+  void drawPixel(int16_t x, int16_t y, uint16_t color);
+  uint8_t getPixel(uint16_t x, uint16_t y);
+  void clearDisplay();
+  void refresh(void);
+
+ private:
+  uint8_t _ss, _clk, _mosi;
+  uint32_t _sharpmem_vcom;
+
+#ifdef USE_FAST_PINIO
+  volatile RwReg *dataport, *clkport;
+  uint32_t datapinmask, clkpinmask;
+#endif
+  
+  void sendbyte(uint8_t data);
+  void sendbyteLSB(uint8_t data);
+};