GxEPD2_420c_Z21.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: the e-paper panels 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
// Panel: GDEQ042Z21 : https://www.good-display.com/product/395.html
// Controller: UC8276 : no link available currently, see https://www.good-display.com/companyfile/5/
//
// Author: Jean-Marc Zingg
//
// Version: see library.properties
//
// Library: https://github.com/ZinggJM/GxEPD2
 
#ifndef _GxEPD2_420c_Z21_H_
#define _GxEPD2_420c_Z21_H_
 
#include "../GxEPD2_EPD.h"
 
class GxEPD2_420c_Z21 : public GxEPD2_EPD
{
  public:
    // attributes
    static const uint16_t WIDTH = 400;
    static const uint16_t WIDTH_VISIBLE = WIDTH;
    static const uint16_t HEIGHT = 300;
    static const GxEPD2::Panel panel = GxEPD2::GDEQ042Z21;
    static const bool hasColor = true;
    static const bool hasPartialUpdate = true;
    static const bool usePartialUpdateWindow = true; // works fine on this panel
    static const bool hasFastPartialUpdate = false;
    static const uint16_t power_on_time = 50; // ms, e.g. 42190us
    static const uint16_t power_off_time = 50; // ms, e.g. 39688us
    static const uint16_t full_refresh_time = 16000; // ms, e.g. 15171828us
    static const uint16_t partial_refresh_time = 16000; // ms, e.g. 15171828us
    // constructor
    GxEPD2_420c_Z21(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 clearScreen(uint8_t black_value, uint8_t color_value); // init controller memory and screen
    void writeScreenBuffer(uint8_t value = 0xFF); // init controller memory (default white)
    void writeScreenBuffer(uint8_t black_value, uint8_t color_value); // init controller memory
    // 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 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 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 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 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 _writeScreenBuffer(uint8_t value);
    void _setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h);
    void _PowerOn();
    void _PowerOff();
    void _InitDisplay();
    void _Init_Full();
    void _Init_Part();
    void _Update_Full();
    void _Update_Part();
};
 
#endif