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Modify GxEPD lib for GDEY042T81
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@norbert-walter
norbert-walter committed Sep 20, 2024
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394 changes: 394 additions & 0 deletions lib/obp60task/GxEPD2_420_GDEY042T81_mod.cpp.txt
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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, available here: https://www.good-display.com/product/386.html
// Panel: GDEY042T81 : https://www.good-display.com/product/386.html
// Controller : SSD1683 : https://v4.cecdn.yun300.cn/100001_1909185148/SSD1683.PDF
//
// Author: Jean-Marc Zingg
//
// Version: see library.properties
//
// Library: https://github.com/ZinggJM/GxEPD2

#include "GxEPD2_420_GDEY042T81.h"

GxEPD2_420_GDEY042T81::GxEPD2_420_GDEY042T81(int16_t cs, int16_t dc, int16_t rst, int16_t busy) :
GxEPD2_EPD(cs, dc, rst, busy, HIGH, 10000000, WIDTH, HEIGHT, panel, hasColor, hasPartialUpdate, hasFastPartialUpdate)
{
}

void GxEPD2_420_GDEY042T81::clearScreen(uint8_t value)
{
// full refresh needed for all cases (previous != screen)
_writeScreenBuffer(0x26, value); // set previous
_writeScreenBuffer(0x24, value); // set current
refresh(false); // full refresh
_initial_write = false;
}

void GxEPD2_420_GDEY042T81::writeScreenBuffer(uint8_t value)
{
if (_initial_write) return clearScreen(value);
_writeScreenBuffer(0x24, value); // set current
}

void GxEPD2_420_GDEY042T81::writeScreenBufferAgain(uint8_t value)
{
_writeScreenBuffer(0x24, value); // set current
_writeScreenBuffer(0x26, value); // set previous
}

void GxEPD2_420_GDEY042T81::_writeScreenBuffer(uint8_t command, uint8_t value)
{
if (!_init_display_done) _InitDisplay();
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(command);
_startTransfer();
for (uint32_t i = 0; i < uint32_t(WIDTH) * uint32_t(HEIGHT) / 8; i++)
{
_transfer(value);
}
_endTransfer();
}

void GxEPD2_420_GDEY042T81::writeImage(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
_writeImage(0x24, bitmap, x, y, w, h, invert, mirror_y, pgm);
}

void GxEPD2_420_GDEY042T81::writeImageForFullRefresh(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
_writeImage(0x26, bitmap, x, y, w, h, invert, mirror_y, pgm); // set previous
_writeImage(0x24, bitmap, x, y, w, h, invert, mirror_y, pgm); // set current
}


void GxEPD2_420_GDEY042T81::writeImageAgain(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
_writeImage(0x26, bitmap, x, y, w, h, invert, mirror_y, pgm); // set previous
_writeImage(0x24, bitmap, x, y, w, h, invert, mirror_y, pgm); // set current
}

void GxEPD2_420_GDEY042T81::_writeImage(uint8_t command, const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
delay(1); // yield() to avoid WDT on ESP8266 and ESP32
int16_t wb = (w + 7) / 8; // width bytes, bitmaps are padded
x -= x % 8; // byte boundary
w = wb * 8; // byte boundary
int16_t x1 = x < 0 ? 0 : x; // limit
int16_t y1 = y < 0 ? 0 : y; // limit
int16_t w1 = x + w < int16_t(WIDTH) ? w : int16_t(WIDTH) - x; // limit
int16_t h1 = y + h < int16_t(HEIGHT) ? h : int16_t(HEIGHT) - y; // limit
int16_t dx = x1 - x;
int16_t dy = y1 - y;
w1 -= dx;
h1 -= dy;
if ((w1 <= 0) || (h1 <= 0)) return;
if (!_init_display_done) _InitDisplay();
if (_initial_write) writeScreenBuffer(); // initial full screen buffer clean
_setPartialRamArea(x1, y1, w1, h1);
_writeCommand(command);
_startTransfer();
for (int16_t i = 0; i < h1; i++)
{
for (int16_t j = 0; j < w1 / 8; j++)
{
uint8_t data;
// use wb, h of bitmap for index!
int16_t idx = mirror_y ? j + dx / 8 + ((h - 1 - (i + dy))) * wb : j + dx / 8 + (i + dy) * wb;
if (pgm)
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
data = pgm_read_byte(&bitmap[idx]);
#else
data = bitmap[idx];
#endif
}
else
{
data = bitmap[idx];
}
if (invert) data = ~data;
_transfer(data);
}
}
_endTransfer();
delay(1); // yield() to avoid WDT on ESP8266 and ESP32
}

void GxEPD2_420_GDEY042T81::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, bool mirror_y, bool pgm)
{
_writeImagePart(0x24, bitmap, x_part, y_part, w_bitmap, h_bitmap, x, y, w, h, invert, mirror_y, pgm);
}

void GxEPD2_420_GDEY042T81::writeImagePartAgain(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, bool mirror_y, bool pgm)
{
_writeImagePart(0x24, bitmap, x_part, y_part, w_bitmap, h_bitmap, x, y, w, h, invert, mirror_y, pgm);
_writeImagePart(0x26, bitmap, x_part, y_part, w_bitmap, h_bitmap, x, y, w, h, invert, mirror_y, pgm);
}

void GxEPD2_420_GDEY042T81::_writeImagePart(uint8_t command, 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, bool mirror_y, bool pgm)
{
delay(1); // yield() to avoid WDT on ESP8266 and ESP32
if ((w_bitmap < 0) || (h_bitmap < 0) || (w < 0) || (h < 0)) return;
if ((x_part < 0) || (x_part >= w_bitmap)) return;
if ((y_part < 0) || (y_part >= h_bitmap)) return;
int16_t wb_bitmap = (w_bitmap + 7) / 8; // width bytes, bitmaps are padded
x_part -= x_part % 8; // byte boundary
w = w_bitmap - x_part < w ? w_bitmap - x_part : w; // limit
h = h_bitmap - y_part < h ? h_bitmap - y_part : h; // limit
x -= x % 8; // byte boundary
w = 8 * ((w + 7) / 8); // byte boundary, bitmaps are padded
int16_t x1 = x < 0 ? 0 : x; // limit
int16_t y1 = y < 0 ? 0 : y; // limit
int16_t w1 = x + w < int16_t(WIDTH) ? w : int16_t(WIDTH) - x; // limit
int16_t h1 = y + h < int16_t(HEIGHT) ? h : int16_t(HEIGHT) - y; // limit
int16_t dx = x1 - x;
int16_t dy = y1 - y;
w1 -= dx;
h1 -= dy;
if ((w1 <= 0) || (h1 <= 0)) return;
if (!_init_display_done) _InitDisplay();
if (_initial_write) writeScreenBuffer(); // initial full screen buffer clean
_setPartialRamArea(x1, y1, w1, h1);
_writeCommand(command);
_startTransfer();
for (int16_t i = 0; i < h1; i++)
{
for (int16_t j = 0; j < w1 / 8; j++)
{
uint8_t data;
// use wb_bitmap, h_bitmap of bitmap for index!
int16_t idx = mirror_y ? x_part / 8 + j + dx / 8 + ((h_bitmap - 1 - (y_part + i + dy))) * wb_bitmap : x_part / 8 + j + dx / 8 + (y_part + i + dy) * wb_bitmap;
if (pgm)
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
data = pgm_read_byte(&bitmap[idx]);
#else
data = bitmap[idx];
#endif
}
else
{
data = bitmap[idx];
}
if (invert) data = ~data;
_transfer(data);
}
}
_endTransfer();
delay(1); // yield() to avoid WDT on ESP8266 and ESP32
}

void GxEPD2_420_GDEY042T81::writeImage(const uint8_t* black, const uint8_t* color, int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
if (black)
{
writeImage(black, x, y, w, h, invert, mirror_y, pgm);
}
}

void GxEPD2_420_GDEY042T81::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, bool mirror_y, bool pgm)
{
if (black)
{
writeImagePart(black, x_part, y_part, w_bitmap, h_bitmap, x, y, w, h, invert, mirror_y, pgm);
}
}

void GxEPD2_420_GDEY042T81::writeNative(const uint8_t* data1, const uint8_t* data2, int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
if (data1)
{
writeImage(data1, x, y, w, h, invert, mirror_y, pgm);
}
}

void GxEPD2_420_GDEY042T81::drawImage(const uint8_t bitmap[], int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
writeImage(bitmap, x, y, w, h, invert, mirror_y, pgm);
refresh(x, y, w, h);
writeImageAgain(bitmap, x, y, w, h, invert, mirror_y, pgm);
}

void GxEPD2_420_GDEY042T81::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, bool mirror_y, bool pgm)
{
writeImagePart(bitmap, x_part, y_part, w_bitmap, h_bitmap, x, y, w, h, invert, mirror_y, pgm);
refresh(x, y, w, h);
writeImagePartAgain(bitmap, x_part, y_part, w_bitmap, h_bitmap, x, y, w, h, invert, mirror_y, pgm);
}

void GxEPD2_420_GDEY042T81::drawImage(const uint8_t* black, const uint8_t* color, int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
if (black)
{
drawImage(black, x, y, w, h, invert, mirror_y, pgm);
}
}

void GxEPD2_420_GDEY042T81::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, bool mirror_y, bool pgm)
{
if (black)
{
drawImagePart(black, x_part, y_part, w_bitmap, h_bitmap, x, y, w, h, invert, mirror_y, pgm);
}
}

void GxEPD2_420_GDEY042T81::drawNative(const uint8_t* data1, const uint8_t* data2, int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
if (data1)
{
drawImage(data1, x, y, w, h, invert, mirror_y, pgm);
}
}

void GxEPD2_420_GDEY042T81::refresh(bool partial_update_mode)
{
if (partial_update_mode) refresh(0, 0, WIDTH, HEIGHT);
else
{
_Update_Full();
_initial_refresh = false; // initial full update done
}
}

void GxEPD2_420_GDEY042T81::refresh(int16_t x, int16_t y, int16_t w, int16_t h)
{
if (_initial_refresh) return refresh(false); // initial update needs be full update
// intersection with screen
int16_t w1 = x < 0 ? w + x : w; // reduce
int16_t h1 = y < 0 ? h + y : h; // reduce
int16_t x1 = x < 0 ? 0 : x; // limit
int16_t y1 = y < 0 ? 0 : y; // limit
w1 = x1 + w1 < int16_t(WIDTH) ? w1 : int16_t(WIDTH) - x1; // limit
h1 = y1 + h1 < int16_t(HEIGHT) ? h1 : int16_t(HEIGHT) - y1; // limit
if ((w1 <= 0) || (h1 <= 0)) return;
// make x1, w1 multiple of 8
w1 += x1 % 8;
if (w1 % 8 > 0) w1 += 8 - w1 % 8;
x1 -= x1 % 8;
_setPartialRamArea(x1, y1, w1, h1);
_Update_Part();
}

void GxEPD2_420_GDEY042T81::powerOff()
{
_PowerOff();
}

void GxEPD2_420_GDEY042T81::hibernate()
{
_PowerOff();
if (_rst >= 0)
{
_writeCommand(0x10); // deep sleep mode
_writeData(0x1); // enter deep sleep
_hibernating = true;
_init_display_done = false;
}
}

void GxEPD2_420_GDEY042T81::_setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
{
_writeCommand(0x11); // set ram entry mode
_writeData(0x03); // x increase, y increase : normal mode
_writeCommand(0x44);
_writeData(x / 8);
_writeData((x + w - 1) / 8);
_writeCommand(0x45);
_writeData(y % 256);
_writeData(y / 256);
_writeData((y + h - 1) % 256);
_writeData((y + h - 1) / 256);
_writeCommand(0x4e);
_writeData(x / 8);
_writeCommand(0x4f);
_writeData(y % 256);
_writeData(y / 256);
}

void GxEPD2_420_GDEY042T81::_PowerOn()
{
if (!_power_is_on)
{
_writeCommand(0x22);
_writeData(0xe0);
_writeCommand(0x20);
_waitWhileBusy("_PowerOn", power_on_time);
}
_power_is_on = true;
}

void GxEPD2_420_GDEY042T81::_PowerOff()
{
if (_power_is_on)
{
_writeCommand(0x22);
_writeData(0x83);
_writeCommand(0x20);
_waitWhileBusy("_PowerOff", power_off_time);
}
_power_is_on = false;
_using_partial_mode = false;
}

void GxEPD2_420_GDEY042T81::_InitDisplay()
{
if (_hibernating) _reset();
delay(10); // 10ms according to specs
_writeCommand(0x12); //SWRESET
delay(10); // 10ms according to specs
_writeCommand(0x01); // Set MUX as 300
_writeData(0x2B);
_writeData(0x01);
_writeData(0x00);
_writeCommand(0x3C); //BorderWavefrom
_writeData(0x01); //
_writeCommand(0x18); //Read built-in temperature sensor
_writeData(0x80);
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_init_display_done = true;
}

void GxEPD2_420_GDEY042T81::_Update_Full()
{
_writeCommand(0x21); // Display Update Controll
_writeData(0x40); // bypass RED as 0
_writeData(0x00); // single chip application
if (useFastFullUpdate)
{
_writeCommand(0x1A); // Write to temperature register
// _writeData(0x64);
_writeData(0x19);
_writeCommand(0x22);
_writeData(0xd7);
}
else
{
_writeCommand(0x22);
_writeData(0xf7);
}
_writeCommand(0x20);
_waitWhileBusy("_Update_Full", full_refresh_time);
_power_is_on = false;
}

void GxEPD2_420_GDEY042T81::_Update_Part()
{
_writeCommand(0x21); // Display Update Controll
_writeData(0x00); // RED normal
_writeData(0x00); // single chip application
_writeCommand(0x22);
// _writeData(0xfc);
_writeData(0xff);
_writeCommand(0x20);
_waitWhileBusy("_Update_Part", partial_refresh_time);
_power_is_on = true;
}
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