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GxEPD2_32_BW.h
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// Display Library for SPI e-paper panels from Dalian Good Display and boards from Waveshare.
// Requires HW SPI and Adafruit_GFX. Caution: these e-papers require 3.3V supply AND data lines!
//
// based on Demo Example from Good Display: http://www.good-display.com/download_list/downloadcategoryid=34&isMode=false.html
//
// Author: Jean-Marc Zingg
//
// Version: see library.properties
//
// Library: https://github.com/ZinggJM/GxEPD2_32
#ifndef _GxEPD2_32_BW_H_
#define _GxEPD2_32_BW_H_
#include "GxEPD2.h"
class GxEPD2_32_BW : public Adafruit_GFX
{
private:
// ~5k full screen buffer for GDEW042T2 is a good compromise
static const uint16_t buffer_size = 400 * 300 / 8; // 5'000 bytes
// 30k full screen buffer for GDEW075T8 will nearly fill ESP8266
//static const uint16_t buffer_size = 640 * 384 / 8; // 30'720 bytes
public:
GxEPD2_32_BW(GxEPD2::Panel panel, int8_t cs, int8_t dc, int8_t rst, int8_t busy);
void drawPixel(int16_t x, int16_t y, uint16_t color);
GxEPD2::Panel panel()
{
return _panel;
}
bool hasColor()
{
return false;
};
bool hasPartialUpdate()
{
return true;
};
bool hasFastPartialUpdate()
{
return ((_panel < GxEPD2::GDEW027W3) || (_panel == GxEPD2::GDEW042T2));
}
bool mirror(bool m);
void init();
void fillScreen(uint16_t color); // 0x0 black, >0x0 white, to buffer
void setFullWindow();
void setPartialWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
void firstPage();
bool nextPage();
// partial update keeps power on
void powerOff(void);
void drawInvertedBitmap(int16_t x, int16_t y, const uint8_t bitmap[], int16_t w, int16_t h, uint16_t color);
private:
template <typename T> static inline void
swap(T& a, T& b)
{
T t = a;
a = b;
b = t;
}
bool _nextPageFull();
bool _nextPagePart();
bool _nextPageFull27();
bool _nextPagePart27();
bool _nextPageFull42();
bool _nextPagePart42();
bool _nextPageFull75();
bool _nextPagePart75();
void _send8pixel(uint8_t data);
void _writeCommand(uint8_t c);
void _writeData(uint8_t d);
void _writeData(const uint8_t* data, uint16_t n);
void _writeCommandData(const uint8_t* pCommandData, uint8_t datalen);
void _setRamEntryWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint8_t em);
void _setRamArea(uint16_t xs, uint16_t xe, uint16_t ys, uint16_t ye);
void _setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
void _setRamPointer(uint16_t x, uint16_t y);
void _setRamEntryPartialWindow(uint8_t em);
void _refreshWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
void _PowerOn(void);
void _PowerOff(void);
void _waitWhileBusy(const char* comment = 0);
void _InitDisplay(uint8_t em);
void _Init_Full(uint8_t em);
void _Init_Part(uint8_t em);
void _Update_Full(void);
void _Update_Part(void);
void _rotate(uint16_t& x, uint16_t& y, uint16_t& w, uint16_t& h);
static inline uint16_t gx_uint16_min(uint16_t a, uint16_t b)
{
return (a < b ? a : b);
};
static inline uint16_t gx_uint16_max(uint16_t a, uint16_t b)
{
return (a > b ? a : b);
};
protected:
GxEPD2::Panel _panel;
int8_t _cs, _dc, _rst, _busy;
uint8_t _ram_data_entry_mode, _busy_active_level;
uint16_t _width_bytes, _pixel_bytes;
int16_t _current_page;
uint16_t _pages, _page_height;
bool _initial, _power_is_on, _using_partial_mode, _second_phase, _reverse, _mirror;
uint16_t _pw_x, _pw_y, _pw_w, _pw_h;
uint8_t _buffer[buffer_size];
};
#endif