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GxEPD2_32_3C.cpp
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GxEPD2_32_3C.cpp
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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
//
// License: GNU GENERAL PUBLIC LICENSE V3, see LICENSE
//
// Library: https://github.com/ZinggJM/GxEPD2_AVR
#include "GxEPD2_32_3C.h"
#include "WaveTables.h"
// this workaround for GDEW042Z15 updates the whole screen
#define USE_PARTIAL_UPDATE_WORKAROUND_ON_GDEW042Z15
const uint8_t GxEPD2_32_3C::bw2grey[] =
{
0b00000000, 0b00000011, 0b00001100, 0b00001111,
0b00110000, 0b00110011, 0b00111100, 0b00111111,
0b11000000, 0b11000011, 0b11001100, 0b11001111,
0b11110000, 0b11110011, 0b11111100, 0b11111111,
};
GxEPD2_32_3C::GxEPD2_32_3C(GxEPD2::Panel panel, int8_t cs, int8_t dc, int8_t rst, int8_t busy) :
Adafruit_GFX(GxEPD2::ScreenDimensions[panel].width, GxEPD2::ScreenDimensions[panel].height),
_panel(panel), _cs(cs), _dc(dc), _rst(rst), _busy(busy),
_current_page(-1), _using_partial_mode(false), _mirror(false)
{
_initial = true;
_power_is_on = false;
_width_bytes = uint16_t(WIDTH) / 8; // just discard any (WIDTH % 8) pixels
_pixel_bytes = _width_bytes * uint16_t(HEIGHT); // save uint16_t range
_page_height = buffer_size / _width_bytes;
_pages = (HEIGHT / _page_height) + ((HEIGHT % _page_height) > 0);
_busy_active_level = LOW;
}
void GxEPD2_32_3C::drawPixel(int16_t x, int16_t y, uint16_t color)
{
if ((x < 0) || (x >= width()) || (y < 0) || (y >= height())) return;
if (_mirror) x = width() - x - 1;
// check rotation, move pixel around if necessary
switch (getRotation())
{
case 1:
swap(x, y);
x = WIDTH - x - 1;
break;
case 2:
x = WIDTH - x - 1;
y = HEIGHT - y - 1;
break;
case 3:
swap(x, y);
y = HEIGHT - y - 1;
break;
}
uint16_t i = x / 8 + y * _width_bytes;
if (_current_page < 1)
{
if (i >= sizeof(_black_buffer)) return;
}
else
{
y -= _current_page * _page_height;
if ((y < 0) || (y >= _page_height)) return;
i = x / 8 + y * _width_bytes;
}
_black_buffer[i] = (_black_buffer[i] & (0xFF ^ (1 << (7 - x % 8)))); // white
_red_buffer[i] = (_red_buffer[i] & (0xFF ^ (1 << (7 - x % 8)))); // white
if (color == GxEPD_WHITE) return;
else if (color == GxEPD_BLACK) _black_buffer[i] = (_black_buffer[i] | (1 << (7 - x % 8)));
else if (color == GxEPD_RED) _red_buffer[i] = (_red_buffer[i] | (1 << (7 - x % 8)));
}
bool GxEPD2_32_3C::mirror(bool m)
{
swap (_mirror, m);
return m;
}
void GxEPD2_32_3C::init()
{
// Serial.print(WIDTH); Serial.print("x"); Serial.print(HEIGHT);
// Serial.print(" : "); Serial.print(_pages); Serial.print(" pages of ");
// Serial.print(_page_height); Serial.println(" height");
if (_cs >= 0)
{
digitalWrite(_cs, HIGH);
pinMode(_cs, OUTPUT);
}
if (_dc >= 0)
{
digitalWrite(_dc, HIGH);
pinMode(_dc, OUTPUT);
}
if (_rst >= 0)
{
digitalWrite(_rst, HIGH);
pinMode(_rst, OUTPUT);
delay(20);
digitalWrite(_rst, LOW);
delay(20);
digitalWrite(_rst, HIGH);
delay(200);
}
if (_busy >= 0)
{
pinMode(_busy, INPUT);
}
SPI.begin();
SPI.setDataMode(SPI_MODE0);
SPI.setBitOrder(MSBFIRST);
#if defined(SPI_HAS_TRANSACTION)
// true also for STM32F1xx Boards
SPISettings settings(4000000, MSBFIRST, SPI_MODE0);
SPI.beginTransaction(settings);
SPI.endTransaction();
//Serial.println("SPI has Transaction");
#elif defined(ESP8266) || defined(ESP32)
SPI.setFrequency(4000000);
#endif
fillScreen(GxEPD_WHITE);
_initial = true;
_power_is_on = false;
_current_page = -1;
}
void GxEPD2_32_3C::fillScreen(uint16_t color)
{
uint8_t black = 0x00;
uint8_t red = 0x00;
if (color == GxEPD_WHITE);
else if (color == GxEPD_BLACK) black = 0xFF;
else if (color == GxEPD_RED) red = 0xFF;
for (uint16_t x = 0; x < sizeof(_black_buffer); x++)
{
_black_buffer[x] = black;
_red_buffer[x] = red;
}
}
void GxEPD2_32_3C::setFullWindow()
{
_using_partial_mode = false;
}
void GxEPD2_32_3C::setPartialWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
{
if (_panel != GxEPD2::GDEW0154Z04)
{
_rotate(x, y, w, h);
_using_partial_mode = true;
_pw_x = gx_uint16_min(x, WIDTH);
_pw_y = gx_uint16_min(y, HEIGHT);
_pw_w = gx_uint16_min(w, WIDTH - _pw_x);
_pw_h = gx_uint16_min(h, HEIGHT - _pw_y);
}
else
{
Serial.println("GDEW0154Z04 does not support partial update");
}
}
void GxEPD2_32_3C::firstPage()
{
_current_page = 0;
_second_phase = false;
if (!_using_partial_mode)
{
_Init_Full();
_writeCommand(0x10);
}
else
{
if ((_pw_w > 0) && (_pw_h > 0))
{
switch (_panel)
{
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
case GxEPD2::GDEW075Z09:
_Init_Part();
_writeCommand(0x91); // partial in
_setPartialRamArea(_pw_x, _pw_y, _pw_w, _pw_h);
_writeCommand(0x10);
break;
case GxEPD2::GDEW027C44:
_Init_Part();
_setPartialRamArea27(0x14, _pw_x, _pw_y, _pw_w, _pw_h);
break;
}
}
}
}
bool GxEPD2_32_3C::nextPage()
{
if (!_using_partial_mode)
{
switch (_panel)
{
case GxEPD2::GDEW0154Z04:
return _nextPageFull154();
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
return _nextPageFull();
case GxEPD2::GDEW027C44:
return _nextPageFull27();
case GxEPD2::GDEW075Z09:
return _nextPageFull75();
}
}
else if ((_pw_w > 0) && (_pw_h > 0))
{
switch (_panel)
{
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
return _nextPagePart();
case GxEPD2::GDEW027C44:
return _nextPagePart27();
case GxEPD2::GDEW075Z09:
return _nextPagePart75();
}
}
return false;
}
void GxEPD2_32_3C::powerOff(void)
{
_PowerOff();
}
void GxEPD2_32_3C::drawInvertedBitmap(int16_t x, int16_t y, const uint8_t bitmap[], int16_t w, int16_t h, uint16_t color)
{
// taken from Adafruit_GFX.cpp, modified
int16_t byteWidth = (w + 7) / 8; // Bitmap scanline pad = whole byte
uint8_t byte = 0;
for (int16_t j = 0; j < h; j++)
{
for (int16_t i = 0; i < w; i++ )
{
if (i & 7) byte <<= 1;
else
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
byte = pgm_read_byte(&bitmap[j * byteWidth + i / 8]);
#else
byte = bitmap[j * byteWidth + i / 8];
#endif
}
if (!(byte & 0x80))
{
drawPixel(x + i, y + j, color);
}
}
}
}
void GxEPD2_32_3C::clearScreen(uint8_t black_value, uint8_t red_value)
{
switch (_panel)
{
case GxEPD2::GDEW0154Z04:
_Init_Full();
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(bw2grey[(black_value & 0xF0) >> 4]);
_writeData(bw2grey[black_value & 0x0F]);
}
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(red_value);
}
_Update_Full();
break;
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
_Init_Part();
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(black_value);
}
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(red_value);
}
_Update_Part();
_writeCommand(0x92); // partial out
break;
case GxEPD2::GDEW027C44:
_Init_Part();
_setPartialRamArea27(0x14, 0, 0, WIDTH, HEIGHT);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(~black_value);
}
_setPartialRamArea27(0x15, 0, 0, WIDTH, HEIGHT);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(~red_value);
}
_refreshWindow(0, 0, WIDTH, HEIGHT);
_waitWhileBusy("clearScreen");
break;
case GxEPD2::GDEW075Z09:
_Init_Part();
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_send8pixel(~black_value, ~red_value);
}
_Update_Part();
_writeCommand(0x92); // partial out
break;
}
}
void GxEPD2_32_3C::writeScreenBuffer(uint8_t black_value, uint8_t red_value)
{
switch (_panel)
{
case GxEPD2::GDEW0154Z04:
_Init_Full();
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(bw2grey[(black_value & 0xF0) >> 4]);
_writeData(bw2grey[black_value & 0x0F]);
}
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(red_value);
}
break;
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
_Init_Part();
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(black_value);
}
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(red_value);
}
_writeCommand(0x92); // partial out
break;
case GxEPD2::GDEW027C44:
_Init_Part();
_setPartialRamArea27(0x14, 0, 0, WIDTH, HEIGHT);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(~black_value);
}
_setPartialRamArea27(0x15, 0, 0, WIDTH, HEIGHT);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(~red_value);
}
break;
case GxEPD2::GDEW075Z09:
_Init_Part();
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_send8pixel(~black_value, ~red_value);
}
_writeCommand(0x92); // partial out
break;
}
}
void GxEPD2_32_3C::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(bitmap, NULL, x, y, w, h, invert, mirror_y, pgm);
}
void GxEPD2_32_3C::writeImage(const uint8_t* black, const uint8_t* red, int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
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 < WIDTH ? w : WIDTH - x; // limit
int16_t h1 = y + h < HEIGHT ? h : HEIGHT - y; // limit
int16_t dx = x1 - x;
int16_t dy = y1 - y;
w1 -= dx;
h1 -= dy;
if ((w1 <= 0) || (h1 <= 0)) return;
switch (_panel)
{
case GxEPD2::GDEW0154Z04:
_Init_Full();
_writeCommand(0x10);
for (int16_t i = 0; i < HEIGHT; i++)
{
for (int16_t j = 0; j < WIDTH; j += 8)
{
uint8_t data = 0xFF;
if (black)
{
// use wb, h of bitmap for index!
if (((x + j) >= 0) && ((x + j) < w) && ((y + i) >= 0) && ((y + i) < h))
{
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(&black[idx]);
#else
data = black[idx];
#endif
}
else
{
data = black[idx];
}
if (invert) data = ~data;
}
}
//_writeData(data);
_writeData(bw2grey[(data & 0xF0) >> 4]);
_writeData(bw2grey[data & 0x0F]);
}
}
_writeCommand(0x13);
for (int16_t i = 0; i < HEIGHT; i++)
{
for (int16_t j = 0; j < WIDTH; j += 8)
{
uint8_t data = 0xFF;
if (red)
{
// use wb, h of bitmap for index!
if (((x + j) >= 0) && ((x + j) < w) && ((y + i) >= 0) && ((y + i) < h))
{
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(&red[idx]);
#else
data = red[idx];
#endif
}
else
{
data = red[idx];
}
if (invert) data = ~data;
}
}
_writeData(data);
}
}
return;
case GxEPD2::GDEW075Z09:
_Init_Part();
_writeCommand(0x91); // partial in
_setPartialRamArea(x1, y1, w1, h1);
_writeCommand(0x10);
for (int16_t i = 0; i < h1; i++)
{
for (int16_t j = 0; j < w1 / 8; j++)
{
uint8_t black_data = 0xFF;
uint8_t red_data = 0xFF;
if (black)
{
// use w, h of bitmap for index!
int16_t idx = mirror_y ? j + dx / 8 + ((h - 1 - (i + dy))) * (w / 8) : j + dx / 8 + (i + dy) * (w / 8);
if (pgm)
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
black_data = pgm_read_byte(&black[idx]);
#else
black_data = black[idx];
#endif
}
else
{
black_data = black[idx];
}
if (invert) black_data = ~black_data;
}
if (red)
{
// use w, h of bitmap for index!
int16_t idx = mirror_y ? j + dx / 8 + ((h - 1 - (i + dy))) * (w / 8) : j + dx / 8 + (i + dy) * (w / 8);
if (pgm)
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
red_data = pgm_read_byte(&red[idx]);
#else
red_data = red[idx];
#endif
}
else
{
red_data = red[idx];
}
if (invert) red_data = ~red_data;
}
_send8pixel(~black_data, ~red_data);
}
}
_writeCommand(0x92); // partial out
return;
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
_Init_Part();
_writeCommand(0x91); // partial in
_setPartialRamArea(x1, y1, w1, h1);
_writeCommand(0x10);
break;
case GxEPD2::GDEW027C44:
_Init_Part();
_setPartialRamArea27(0x14, x1, y1, w1, h1);
break;
}
for (int16_t i = 0; i < h1; i++)
{
for (int16_t j = 0; j < w1 / 8; j++)
{
uint8_t data = 0xFF;
if (black)
{
// use w, h of bitmap for index!
int16_t idx = mirror_y ? j + dx / 8 + ((h - 1 - (i + dy))) * (w / 8) : j + dx / 8 + (i + dy) * (w / 8);
if (pgm)
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
data = pgm_read_byte(&black[idx]);
#else
data = black[idx];
#endif
}
else
{
data = black[idx];
}
if (invert) data = ~data;
}
if (_panel == GxEPD2::GDEW027C44) data = ~data;
_writeData(data);
}
}
switch (_panel)
{
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
_writeCommand(0x13);
break;
case GxEPD2::GDEW027C44:
_setPartialRamArea27(0x15, x1, y1, w1, h1);
break;
}
for (int16_t i = 0; i < h1; i++)
{
for (int16_t j = 0; j < w1 / 8; j++)
{
uint8_t data = 0xFF;
if (red)
{
// use w, h of bitmap for index!
int16_t idx = mirror_y ? j + dx / 8 + ((h - 1 - (i + dy))) * (w / 8) : j + dx / 8 + (i + dy) * (w / 8);
if (pgm)
{
#if defined(__AVR) || defined(ESP8266) || defined(ESP32)
data = pgm_read_byte(&red[idx]);
#else
data = red[idx];
#endif
}
else
{
data = red[idx];
}
if (invert) data = ~data;
}
if (_panel == GxEPD2::GDEW027C44) data = ~data;
_writeData(data);
}
}
if (_panel != GxEPD2::GDEW027C44)
{
_writeCommand(0x92); // partial out
}
}
void GxEPD2_32_3C::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);
}
void GxEPD2_32_3C::drawImage(const uint8_t* black, const uint8_t* red, int16_t x, int16_t y, int16_t w, int16_t h, bool invert, bool mirror_y, bool pgm)
{
writeImage(black, red, x, y, w, h, invert, mirror_y, pgm);
refresh(x, y, w, h);
}
void GxEPD2_32_3C::refresh(bool partial_update_mode)
{
if (partial_update_mode) refresh(0, 0, WIDTH, HEIGHT);
else _Update_Full();
}
void GxEPD2_32_3C::refresh(int16_t x, int16_t y, int16_t w, int16_t h)
{
x -= x % 8; // byte boundary
w -= x % 8; // byte boundary
int16_t x1 = x < 0 ? 0 : x; // limit
int16_t y1 = y < 0 ? 0 : y; // limit
int16_t w1 = x + w < WIDTH ? w : WIDTH - x; // limit
int16_t h1 = y + h < HEIGHT ? h : HEIGHT - y; // limit
w1 -= x1 - x;
h1 -= y1 - y;
switch (_panel)
{
case GxEPD2::GDEW0154Z04:
_Update_Full();
break;
case GxEPD2::GDEW0213Z16:
case GxEPD2::GDEW029Z10:
case GxEPD2::GDEW042Z15:
case GxEPD2::GDEW075Z09:
_Init_Part();
_setPartialRamArea(x1, y1, w1, h1);
_Update_Part();
break;
case GxEPD2::GDEW027C44:
_refreshWindow(x1, y1, w1, h1);
_waitWhileBusy("refresh");
break;
}
}
bool GxEPD2_32_3C::_nextPageFull()
{
uint16_t page_ys = _current_page * _page_height;
uint16_t bytes = (_current_page < (_pages - 1) ? _page_height : HEIGHT - page_ys) * _width_bytes;
if (!_second_phase)
{
for (uint16_t idx = 0; idx < bytes; idx++)
{
uint8_t data = (idx < sizeof(_black_buffer)) ? _black_buffer[idx] : 0x00;
_writeData(~data);
}
_current_page++;
if (_current_page < _pages)
{
return true;
}
_second_phase = true;
_current_page = 0;
_writeCommand(0x13);
return true;
}
for (uint16_t idx = 0; idx < bytes; idx++)
{
uint8_t data = (idx < sizeof(_red_buffer)) ? _red_buffer[idx] : 0x00;
_writeData(~data);
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
_Update_Full();
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_3C::_nextPagePart()
{
uint16_t page_ys = _current_page * _page_height;
uint16_t page_ye = _current_page < (_pages - 1) ? page_ys + _page_height : HEIGHT;
uint16_t dest_ys = gx_uint16_max(_pw_y, page_ys);
uint16_t dest_ye = gx_uint16_min(_pw_y + _pw_h, page_ye);
if (dest_ye > dest_ys)
{
uint16_t xs_d8 = _pw_x / 8;
uint16_t xe_d8 = (_pw_x + _pw_w + 7) / 8;
uint16_t ys = dest_ys - page_ys;
uint16_t ye = dest_ye - page_ys;
uint8_t* buffer = _second_phase ? _red_buffer : _black_buffer;
for (uint16_t y = ys; y < ye; y++)
{
for (uint16_t x = xs_d8; x < xe_d8; x++)
{
uint16_t idx = x + y * _width_bytes;
uint8_t data = (idx < sizeof(_black_buffer)) ? buffer[idx] : 0x00;
_writeData(~data);
}
}
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
if (!_second_phase)
{
fillScreen(GxEPD_WHITE);
_second_phase = true;
_current_page = 0;
_writeCommand(0x13);
return true;
}
#ifdef USE_PARTIAL_UPDATE_WORKAROUND_ON_GDEW042Z15
if (_panel == GxEPD2::GDEW042Z15)
{
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
}
#endif
_Update_Part();
_writeCommand(0x92); // partial out
delay(200);
_current_page = -1;
return false;
}
bool GxEPD2_32_3C::_nextPageFull154()
{
uint16_t page_ys = _current_page * _page_height;
uint16_t bytes = (_current_page < (_pages - 1) ? _page_height : HEIGHT - page_ys) * _width_bytes;
if (!_second_phase)
{
for (uint16_t idx = 0; idx < bytes; idx++)
{
uint8_t data = (idx < sizeof(_black_buffer)) ? ~_black_buffer[idx] : 0xFF;
_writeData(bw2grey[(data & 0xF0) >> 4]);
_writeData(bw2grey[data & 0x0F]);
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
fillScreen(GxEPD_WHITE);
_second_phase = true;
_current_page = 0;
_writeCommand(0x13);
return true;
}
for (uint16_t idx = 0; idx < bytes; idx++)
{
_writeData((idx < sizeof(_red_buffer)) ? ~_red_buffer[idx] : 0xFF);
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
_Update_Full();
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_3C::_nextPageFull27()
{
uint16_t page_ys = _current_page * _page_height;
uint16_t bytes = (_current_page < (_pages - 1) ? _page_height : HEIGHT - page_ys) * _width_bytes;
if (!_second_phase)
{
for (uint16_t idx = 0; idx < bytes; idx++)
{
uint8_t data = (idx < sizeof(_black_buffer)) ? _black_buffer[idx] : 0x00;
_writeData(data);
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
fillScreen(GxEPD_WHITE);
_second_phase = true;
_current_page = 0;
_writeCommand(0x13);
return true;
}
for (uint16_t idx = 0; idx < bytes; idx++)
{
uint8_t data = (idx < sizeof(_red_buffer)) ? _red_buffer[idx] : 0x00;
_writeData(data);
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
_Update_Full();
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_3C::_nextPagePart27()
{
uint16_t page_ys = _current_page * _page_height;
uint16_t page_ye = _current_page < (_pages - 1) ? page_ys + _page_height : HEIGHT;
uint16_t dest_ys = gx_uint16_max(_pw_y, page_ys);
uint16_t dest_ye = gx_uint16_min(_pw_y + _pw_h, page_ye);
if (dest_ye > dest_ys)
{
uint16_t xs_d8 = _pw_x / 8; // byte boundary
uint16_t xe_d8 = ((_pw_x + _pw_w - 1) | 0x0007) / 8; // byte boundary inclusive (last byte)
uint16_t ys = dest_ys - page_ys;
uint16_t ye = dest_ye - page_ys; // exclusive
uint8_t* buffer = _second_phase ? _red_buffer : _black_buffer;
for (uint16_t y = ys; y < ye; y++)
{
for (uint16_t x = xs_d8; x <= xe_d8; x++)
{
uint16_t idx = x + y * _width_bytes;
uint8_t data = (idx < sizeof(_black_buffer)) ? buffer[idx] : 0x00;
_writeData(data);
}
}
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
if (!_second_phase)
{
fillScreen(GxEPD_WHITE);
_second_phase = true;
_current_page = 0;
_setPartialRamArea27(0x15, _pw_x, _pw_y, _pw_w, _pw_h);
return true;
}
_refreshWindow(_pw_x, _pw_y, _pw_w, _pw_h);
_waitWhileBusy("_nextPage27");
delay(500); // don't stress this display
_current_page = -1;
return false;
}
bool GxEPD2_32_3C::_nextPageFull75()
{
uint16_t page_ys = _current_page * _page_height;
uint16_t bytes = (_current_page < (_pages - 1) ? _page_height : HEIGHT - page_ys) * _width_bytes;
for (uint16_t idx = 0; idx < bytes; idx++)
{
_send8pixel(_black_buffer[idx], _red_buffer[idx]);
}
_current_page++;
if (_current_page < _pages)
{
return true;
}
_Update_Full();
delay(200);
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_3C::_nextPagePart75()
{
uint16_t page_ys = _current_page * _page_height;
uint16_t page_ye = _current_page < (_pages - 1) ? page_ys + _page_height : HEIGHT;
uint16_t dest_ys = gx_uint16_max(_pw_y, page_ys);
uint16_t dest_ye = gx_uint16_min(_pw_y + _pw_h, page_ye);
if (dest_ye > dest_ys)
{
uint16_t xe_d8 = ((_pw_x + _pw_w - 1) | 0x0007) / 8; // byte boundary inclusive (last byte)
uint16_t xs_d8 = _pw_x / 8; // byte boundary
uint16_t ys = dest_ys - page_ys;
uint16_t ye = dest_ye - page_ys; // exclusive
for (uint16_t y = ys; y < ye; y++)
{
for (uint16_t x = xs_d8; x <= xe_d8; x++)
{
uint16_t idx = x + y * _width_bytes;
_send8pixel(_black_buffer[idx], _red_buffer[idx]);
}
}
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
_Update_Part();
_writeCommand(0x92); // partial out
_current_page = -1;
return false;
}
void GxEPD2_32_3C::_send8pixel(uint8_t black_data, uint8_t red_data)
{
for (uint8_t j = 0; j < 8; j++)
{
uint8_t t = 0x00; // black
if (black_data & 0x80); // keep black
else if (red_data & 0x80) t = 0x04; //red
else t = 0x03; // white
t <<= 4;
black_data <<= 1;
red_data <<= 1;
j++;
if (black_data & 0x80); // keep black
else if (red_data & 0x80) t |= 0x04; //red
else t |= 0x03; // white
black_data <<= 1;
red_data <<= 1;
_writeData(t);
}
}
void GxEPD2_32_3C::_writeCommand(uint8_t c)
{
if (_dc >= 0) digitalWrite(_dc, LOW);
if (_cs >= 0) digitalWrite(_cs, LOW);
SPI.transfer(c);
if (_cs >= 0) digitalWrite(_cs, HIGH);
if (_dc >= 0) digitalWrite(_dc, HIGH);
}
void GxEPD2_32_3C::_writeData(uint8_t d)
{
if (_cs >= 0) digitalWrite(_cs, LOW);
SPI.transfer(d);
if (_cs >= 0) digitalWrite(_cs, HIGH);
}
void GxEPD2_32_3C::_writeData(const uint8_t* data, uint16_t n)
{
if (_cs >= 0) digitalWrite(_cs, LOW);
for (uint8_t i = 0; i < n; i++)
{
SPI.transfer(*data++);
}
if (_cs >= 0) digitalWrite(_cs, HIGH);
}
void GxEPD2_32_3C::_writeData_nCS(const uint8_t* data, uint16_t n)
{
for (uint8_t i = 0; i < n; i++)
{
if (_cs >= 0) digitalWrite(_cs, LOW);
SPI.transfer(*data++);
if (_cs >= 0) digitalWrite(_cs, HIGH);
}
}
void GxEPD2_32_3C::_waitWhileBusy(const char* comment)
{
unsigned long start = micros();
while (1)
{
if (digitalRead(_busy) != _busy_active_level) break;
delay(1);
if (micros() - start > (_panel == GxEPD2::GDEW075Z09 ? 40000000 : 20000000)) // > ? : >14.9s !
{