EPD215.h

/*********************************************************************
This is a library for the Pervasive Displays Epaper Screen E2215CS062.
This library has been written for and fully supports the Teensy-LC and the rest of the Teensy 3.x series and uses their native SPI library.
It can also be used with Arduino, ESP8266, and most available microcontrollers, optionally using a slower bitbanged interface.

This code and further updates will be hosted at https://github.com/jarek319/EPD215

These displays use SPI to communicate. For more information on the signaling protocol used, please see the official datasheet for all the details: http://www.pervasivedisplays.com/LiteratureRetrieve.aspx?ID=232068

Written by Jarek Lupinski for Soniktech LLC  
Adapted from Adafruit GFX library driver code
unlicense, check LICENSE for more information
All text above must be included in any redistribution
*********************************************************************/
#ifndef _EPD215_H_
#define _EPD215_H_

#if ARDUINO >= 100
 #include "Arduino.h"
#else
 #include "WProgram.h"
#endif

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

//Default is Portrait view
#define WIDTH    112
#define HEIGHT   208

#define BLACK    0
#define WHITE    1
#define INVERSE  2

#define DRIVEROUTPUTCONTROL 0x01
#define GATESCANSTART       0x0F
#define DATAENTRYMODE       0x11
#define SETRAMXSTARTEND     0x44
#define SETRAMYSTARTEND     0x45
#define SETRAMXADDRESS      0x4E
#define SETRAMYADDRESS      0x4F
#define SETBORDERWAVEFORM   0x3C
#define SETGATEDRIVINGVOLT  0x03
#define NORMALANALOGMODE1   0x05
#define NORMALANALOGMODE2   0x75
#define SENDIMAGEDATA       0x24
#define SETTEMPERATURE      0x1A
#define SETUPDATESEQUENCE   0x22
#define ACTIVEDISPLAYUPDATE 0x20

class EPD215 : public Adafruit_GFX {
 public:
  EPD215( uint32_t cs, uint32_t dc, uint32_t rs, uint32_t bs, int32_t d0 = 0xFF, int32_t d1 = 0xFF );
  void initScreen();
  void updateScreen( uint8_t temperature = 0x1A );
  void clearScreen();
  void writeToBuffer( uint8_t *buf );
  void softwareSpi( uint8_t data );
  void drawPixel( int16_t x, int16_t y, uint16_t color );
  void setRotation(uint8_t r);

 private:
  uint32_t _d0, _d1, _cs, _dc, _rs, _bs;
  uint8_t _spiMode, _rotation, _cursorX, _cursorY;
  void _sendIndexData( uint8_t index, uint8_t *data, uint16_t len );
  uint8_t _bitReverse( uint8_t x );

};

#endif /* _EPD215_H_ */