GxEPD2_420.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.e-paper-display.com/download_list/downloadcategoryid=34&isMode=false.html
// Controller: IL0398 : http://www.e-paper-display.com/download_detail/downloadsId=537.html
//
// Author: Jean-Marc Zingg
//
// Version: see library.properties
//
// Library: https://github.com/ZinggJM/GxEPD2
 
#ifndef _GxEPD2_420_H_
#define _GxEPD2_420_H_
 
#include "../GxEPD2_EPD.h"
 
#define GxEPD_BPP 2
 
class GxEPD2_420 : public GxEPD2_EPD
{
  public:
    // attributes
    static const uint16_t WIDTH = 400;
    static const uint16_t HEIGHT = 300;
    static const GxEPD2::Panel panel = GxEPD2::GDEW042T2;
    static const bool hasColor = false;
    static const bool hasPartialUpdate = true;
    static const bool usePartialUpdateWindow = false; // set false for better image
    static const bool hasFastPartialUpdate = true;
    static const uint16_t power_on_time = 40; // ms, e.g. 36996us
    static const uint16_t power_off_time = 20; // ms, e.g. 19285us
    static const uint16_t full_refresh_time = 1600; // ms, e.g. 1545659us
    static const uint16_t partial_refresh_time = 600; // ms, e.g. 563754us
    // constructor
    GxEPD2_420(int16_t cs, int16_t dc, int16_t rst, int16_t busy);
    // methods (virtual)
    //  Support for Bitmaps (Sprites) to Controller Buffer and to Screen
    void clearScreen(uint8_t value = 0xFF); // init controller memory and screen (default white)
    void writeScreenBuffer(uint8_t value = 0xFF); // init controller memory (default white)
    // write to controller memory, without screen refresh; x and w should be multiple of 8
    void writeImage(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void writeImage_4G(const uint8_t bitmap[], uint8_t bpp, int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void writeImagePart(const uint8_t bitmap[], int16_t x_part, int16_t y_part, int16_t w_bitmap, int16_t h_bitmap,
                        int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void writeImagePart_4G(const uint8_t bitmap[], uint8_t bpp, int16_t x_part, int16_t y_part, int16_t w_bitmap, int16_t h_bitmap,
                        int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void writeImage(const uint8_t* black, const uint8_t* color, int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void writeImagePart(const uint8_t* black, const uint8_t* color, int16_t x_part, int16_t y_part, int16_t w_bitmap, int16_t h_bitmap,
                        int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    // write sprite of native data to controller memory, without screen refresh; x and w should be multiple of 8
    void writeNative(const uint8_t* data1, const uint8_t* data2, int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    // write to controller memory, with screen refresh; x and w should be multiple of 8
    void drawImage(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void drawImage_4G(const uint8_t bitmap[], uint8_t bpp, int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void drawImagePart(const uint8_t bitmap[], int16_t x_part, int16_t y_part, int16_t w_bitmap, int16_t h_bitmap,
                       int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void drawImagePart_4G(const uint8_t bitmap[], uint8_t bpp, int16_t x_part, int16_t y_part, int16_t w_bitmap, int16_t h_bitmap,
                       int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void drawImage(const uint8_t* black, const uint8_t* color, int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void drawImagePart(const uint8_t* black, const uint8_t* color, int16_t x_part, int16_t y_part, int16_t w_bitmap, int16_t h_bitmap,
                       int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    // write sprite of native data to controller memory, with screen refresh; x and w should be multiple of 8
    void drawNative(const uint8_t* data1, const uint8_t* data2, int16_t x, int16_t y, int16_t w, int16_t h, bool invert = false, bool mirror_y = false, bool pgm = false);
    void refresh(bool partial_update_mode = false); // screen refresh from controller memory to full screen
    void refresh(int16_t x, int16_t y, int16_t w, int16_t h); // screen refresh from controller memory, partial screen
    void powerOff(); // turns off generation of panel driving voltages, avoids screen fading over time
    void hibernate(); // turns powerOff() and sets controller to deep sleep for minimum power use, ONLY if wakeable by RST (rst >= 0)
  private:
    void _setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
    void _PowerOn();
    void _PowerOff();
    void _InitDisplay();
    void _Force_Init_Full();
    void _Init_Full();
    void _Init_4G();
    void _Init_Part();
    void _Update_Full();
    void _Update_4G();
    void _Update_Part();
  private:
    enum {full_refresh, grey_refresh, fast_refresh, forced_full_refresh} _refresh_mode;
    static const unsigned char lut_20_vcom0_full[];
    static const unsigned char lut_21_ww_full[];
    static const unsigned char lut_22_bw_full[];
    static const unsigned char lut_23_wb_full[];
    static const unsigned char lut_24_bb_full[];
    static const unsigned char lut_20_vcom0_4G[];
    static const unsigned char lut_21_ww_4G[];
    static const unsigned char lut_22_bw_4G[];
    static const unsigned char lut_23_wb_4G[];
    static const unsigned char lut_24_bb_4G[];
    static const unsigned char lut_20_vcom0_partial[];
    static const unsigned char lut_21_ww_partial[];
    static const unsigned char lut_22_bw_partial[];
    static const unsigned char lut_23_wb_partial[];
    static const unsigned char lut_24_bb_partial[];
};
 
#endif