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Copy pathGxEPD2_32_BW.cpp
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GxEPD2_32_BW.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
//
// Library: https://github.com/ZinggJM/GxEPD2_32
#include "GxEPD2_32_BW.h"
#include "WaveTables.h"
GxEPD2_32_BW::GxEPD2_32_BW(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);
_ram_data_entry_mode = (_panel == GxEPD2::GDE0213B1) ? 0x01 : 0x03;
_reverse = (_panel == GxEPD2::GDE0213B1);
_busy_active_level = (_panel < GxEPD2::GDEW027W3) ? HIGH : LOW;
}
void GxEPD2_32_BW::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;
}
if (_reverse)
{
// flip y for y-decrement mode
y = HEIGHT - y - 1;
}
uint16_t i = x / 8 + y * _width_bytes;
if (_current_page < 1)
{
if (i >= sizeof(_buffer)) return;
}
else
{
y -= _current_page * _page_height;
if ((y < 0) || (y >= _page_height)) return;
i = x / 8 + y * _width_bytes;
}
if (!color)
_buffer[i] = (_buffer[i] | (1 << (7 - x % 8)));
else
_buffer[i] = (_buffer[i] & (0xFF ^ (1 << (7 - x % 8))));
}
bool GxEPD2_32_BW::mirror(bool m)
{
swap (_mirror, m);
return m;
}
void GxEPD2_32_BW::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_BW::fillScreen(uint16_t color)
{
uint8_t data = (color == GxEPD_BLACK) ? 0xFF : 0x00;
for (uint16_t x = 0; x < sizeof(_buffer); x++)
{
_buffer[x] = data;
}
}
void GxEPD2_32_BW::setFullWindow()
{
_using_partial_mode = false;
}
void GxEPD2_32_BW::setPartialWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
{
_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);
}
void GxEPD2_32_BW::firstPage()
{
_current_page = 0;
_second_phase = false;
if (!_using_partial_mode)
{
switch (_panel)
{
case GxEPD2::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
_Init_Full(_ram_data_entry_mode);
_writeCommand(0x24);
break;
case GxEPD2::GDEW027W3:
case GxEPD2::GDEW042T2:
_Init_Full(_ram_data_entry_mode);
_writeCommand(0x13);
break;
case GxEPD2::GDEW075T8:
_Init_Full(_ram_data_entry_mode);
_writeCommand(0x10);
break;
}
}
else
{
if ((_pw_w > 0) && (_pw_h > 0))
{
switch (_panel)
{
case GxEPD2::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
_Init_Part(_ram_data_entry_mode);
_setRamEntryWindow(_pw_x, _pw_y, _pw_w, _pw_h, _ram_data_entry_mode);
break;
case GxEPD2::GDEW027W3:
_Init_Part(_ram_data_entry_mode);
_setPartialRamArea(_pw_x, _pw_y, _pw_w, _pw_h);
break;
case GxEPD2::GDEW042T2:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(_pw_x, _pw_y, _pw_w, _pw_h);
_writeCommand(0x13);
break;
case GxEPD2::GDEW075T8:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(_pw_x, _pw_y, _pw_w, _pw_h);
_writeCommand(0x10);
}
}
}
}
bool GxEPD2_32_BW::nextPage()
{
if (!_using_partial_mode)
{
switch (_panel)
{
case GxEPD2::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
return _nextPageFull();
case GxEPD2::GDEW027W3:
return _nextPageFull27();
case GxEPD2::GDEW042T2:
return _nextPageFull42();
case GxEPD2::GDEW075T8:
return _nextPageFull75();
}
}
else if ((_pw_w > 0) && (_pw_h > 0))
{
switch (_panel)
{
case GxEPD2::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
return _nextPagePart();
case GxEPD2::GDEW027W3:
return _nextPagePart27();
case GxEPD2::GDEW042T2:
return _nextPagePart42();
case GxEPD2::GDEW075T8:
return _nextPagePart75();
}
}
return false;
}
void GxEPD2_32_BW::powerOff(void)
{
_PowerOff();
}
void GxEPD2_32_BW::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_BW::clearScreen(uint8_t value)
{
switch (_panel)
{
case GxEPD2::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
if (_initial)
{
_Init_Full(_ram_data_entry_mode);
_setRamEntryWindow(0, 0, WIDTH, HEIGHT, _ram_data_entry_mode);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Full();
}
else
{
_Init_Part(_ram_data_entry_mode);
_setRamEntryWindow(0, 0, WIDTH, HEIGHT, _ram_data_entry_mode);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Part();
}
_Init_Part(_ram_data_entry_mode);
_setRamEntryWindow(0, 0, WIDTH, HEIGHT, _ram_data_entry_mode);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Part();
break;
case GxEPD2::GDEW027W3:
_Init_Part(_ram_data_entry_mode);
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_refreshWindow(0, 0, WIDTH, HEIGHT);
_waitWhileBusy("clearScreen");
break;
case GxEPD2::GDEW042T2:
if (_initial)
{
_Init_Full(_ram_data_entry_mode);
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Full();
_initial = false;
}
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Part();
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Part();
_writeCommand(0x92); // partial out
break;
case GxEPD2::GDEW075T8:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_send8pixel(~value);
}
_Update_Part();
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_send8pixel(~value);
}
_Update_Part();
_writeCommand(0x92); // partial out
break;
}
_initial = false;
}
void GxEPD2_32_BW::writeScreenBuffer(uint8_t value)
{
if (_initial) clearScreen(value);
else _writeScreenBuffer(value);
}
void GxEPD2_32_BW::_writeScreenBuffer(uint8_t value)
{
switch (_panel)
{
case GxEPD2::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
_Init_Part(_ram_data_entry_mode);
_setRamEntryWindow(0, 0, WIDTH, HEIGHT, _ram_data_entry_mode);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
break;
case GxEPD2::GDEW027W3:
_Init_Part(_ram_data_entry_mode);
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Part(); // needed!
break;
case GxEPD2::GDEW042T2:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x13);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_writeData(value);
}
_Update_Part(); // needed!
_writeCommand(0x92); // partial out
break;
case GxEPD2::GDEW075T8:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(0, 0, WIDTH, HEIGHT);
_writeCommand(0x10);
for (int16_t i = 0; i < WIDTH * HEIGHT / 8; i++)
{
_send8pixel(~value);
}
_writeCommand(0x92); // partial out
break;
}
}
void GxEPD2_32_BW::writeImage(const uint8_t bitmap[], 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::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
_Init_Part(_ram_data_entry_mode);
_setRamEntryWindow(x1, y1, w1, h1, _ram_data_entry_mode);
break;
case GxEPD2::GDEW027W3:
_Init_Part(_ram_data_entry_mode);
_setPartialRamArea(x1, y1, w1, h1);
break;
case GxEPD2::GDEW042T2:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(x1, y1, w1, h1);
_writeCommand(0x13);
break;
case GxEPD2::GDEW075T8:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(x1, y1, w1, h1);
_writeCommand(0x10);
break;
}
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;
if (_panel == GxEPD2::GDEW075T8) _send8pixel(~data);
else _writeData(data);
}
}
switch (_panel)
{
case GxEPD2::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
case GxEPD2::GDEW027W3:
break;
case GxEPD2::GDEW042T2:
case GxEPD2::GDEW075T8:
_writeCommand(0x92); // partial out
break;
}
}
void GxEPD2_32_BW::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)
{
if (black)
{
writeImage(black, x, y, w, h, invert, mirror_y, pgm);
}
}
void GxEPD2_32_BW::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_BW::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_BW::refresh(bool partial_update_mode)
{
if (partial_update_mode) refresh(0, 0, WIDTH, HEIGHT);
else _Update_Full();
}
void GxEPD2_32_BW::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::GDEP015OC1:
case GxEPD2::GDE0213B1:
case GxEPD2::GDEH029A1:
_Init_Part(_ram_data_entry_mode);
_setRamEntryWindow(x1, y1, w1, h1, _ram_data_entry_mode);
_Update_Part();
break;
case GxEPD2::GDEW027W3:
_refreshWindow(x1, y1, w1, h1);
_waitWhileBusy("refresh");
break;
case GxEPD2::GDEW042T2:
case GxEPD2::GDEW075T8:
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x91); // partial in
_setPartialRamArea(x1, y1, w1, h1);
_Update_Part();
break;
}
}
bool GxEPD2_32_BW::_nextPageFull()
{
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++)
{
uint8_t data = (idx < sizeof(_buffer)) ? _buffer[idx] : 0x00;
_writeData(~data);
}
_current_page++;
if (_current_page < _pages)
{
return true;
}
if (!_second_phase)
{
_Update_Full();
delay(200);
// second phase needed for subsequent partial updates
_second_phase = true;
_current_page = 0;
_Init_Part(_ram_data_entry_mode);
_writeCommand(0x24);
return true;
}
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_BW::_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 (_reverse)
{
dest_ys = gx_uint16_max(HEIGHT - _pw_y - _pw_h, page_ys);
dest_ye = gx_uint16_min(HEIGHT - _pw_y, 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;
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(_buffer)) ? _buffer[idx] : 0x00;
_writeData(~data);
}
}
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
if (!_second_phase)
{
_Update_Part();
delay(200);
_second_phase = true;
_current_page = 0;
_setRamEntryWindow(_pw_x, _pw_y, _pw_w, _pw_h, _ram_data_entry_mode); // needed!
return true;
}
delay(200);
//_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_BW::_nextPageFull27()
{
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++)
{
uint8_t data = (idx < sizeof(_buffer)) ? _buffer[idx] : 0x00;
_writeData(~data);
}
_current_page++;
if (_current_page < _pages)
{
return true;
}
_Update_Full();
delay(200);
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_BW::_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
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(_buffer)) ? _buffer[idx] : 0x00;
_writeData(~data);
}
}
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
_refreshWindow(_pw_x, _pw_y, _pw_w, _pw_h);
_waitWhileBusy("_nextPage27");
delay(500); // don't stress this display
//_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_BW::_nextPageFull42()
{
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++)
{
uint8_t data = (idx < sizeof(_buffer)) ? _buffer[idx] : 0x00;
_writeData(~data);
}
_current_page++;
if (_current_page < _pages)
{
return true;
}
if (_initial)
{
_Update_Full();
delay(200);
_initial = false;
_current_page = 0;
_writeCommand(0x13);
return true;
}
_Update_Full();
delay(200);
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_BW::_nextPagePart42()
{
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;
uint8_t data = (idx < sizeof(_buffer)) ? _buffer[idx] : 0x00;
_writeData(~data);
}
}
}
_current_page++;
if (_current_page < _pages)
{
fillScreen(GxEPD_WHITE);
return true;
}
if (!_second_phase)
{
_Update_Part();
_current_page = 0;
_second_phase = true;
fillScreen(GxEPD_WHITE);
_writeCommand(0x13);
return true;
}
_writeCommand(0x92); // partial out
_current_page = -1;
return false;
}
bool GxEPD2_32_BW::_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++)
{
uint8_t data = (idx < sizeof(_buffer)) ? _buffer[idx] : 0x00;
_send8pixel(data);
}
_current_page++;
if (_current_page < _pages)
{
return true;
}
_Update_Full();
delay(200);
_PowerOff();
_current_page = -1;
return false;
}
bool GxEPD2_32_BW::_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;
uint8_t data = (idx < sizeof(_buffer)) ? _buffer[idx] : 0x00;
_send8pixel(data);
}
}
}
_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_BW::_send8pixel(uint8_t data)
{
for (uint8_t j = 0; j < 8; j++)
{
uint8_t t = data & 0x80 ? 0x00 : 0x03;
t <<= 4;
data <<= 1;
j++;
t |= data & 0x80 ? 0x00 : 0x03;
data <<= 1;
_writeData(t);
}
}
void GxEPD2_32_BW::_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_BW::_writeData(uint8_t d)
{
if (_cs >= 0) digitalWrite(_cs, LOW);
SPI.transfer(d);
if (_cs >= 0) digitalWrite(_cs, HIGH);
}
void GxEPD2_32_BW::_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_BW::_writeCommandData(const uint8_t* pCommandData, uint8_t datalen)
{
if (_dc >= 0) digitalWrite(_dc, LOW);
if (_cs >= 0) digitalWrite(_cs, LOW);
SPI.transfer(*pCommandData++);
if (_dc >= 0) digitalWrite(_dc, HIGH);
for (uint8_t i = 0; i < datalen - 1; i++) // sub the command
{
SPI.transfer(*pCommandData++);
}
if (_cs >= 0) digitalWrite(_cs, HIGH);
}
void GxEPD2_32_BW::_waitWhileBusy(const char* comment)
{
unsigned long start = micros();
while (1)
{
if (digitalRead(_busy) != _busy_active_level) break;
delay(1);
if (micros() - start > 10000000)
{
Serial.println("Busy Timeout!");
break;
}
}
if (comment)
{
#if !defined(DISABLE_DIAGNOSTIC_OUTPUT)
unsigned long elapsed = micros() - start;
Serial.print(comment);
Serial.print(" : ");
Serial.println(elapsed);
#endif
}
(void) start;
}
void GxEPD2_32_BW::_setRamEntryWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint8_t em)
{
em = gx_uint16_min(em, 0x03);
_writeCommand(0x11);
_writeData(em);
switch (em)
{
case 0x00: // x decrease, y decrease
_setRamArea((x + w - 1), x, (y + h - 1), y);
_setRamPointer((x + w - 1), (y + h - 1));
break;
case 0x01: // x increase, y decrease : as in demo code
_setRamArea(x, (x + w - 1), (y + h - 1), y);
_setRamPointer(x, (y + h - 1));
break;
case 0x02: // x decrease, y increase
_setRamArea((x + w - 1), x, y, (y + h - 1));
_setRamPointer((x + w - 1), y);
break;
case 0x03: // x increase, y increase : normal mode
_setRamArea(x, (x + w - 1), y, (y + h - 1));
_setRamPointer(x, y);
break;
}
_writeCommand(0x24);
}
void GxEPD2_32_BW::_setRamArea(uint16_t xs, uint16_t xe, uint16_t ys, uint16_t ye)
{
_writeCommand(0x44);
_writeData(xs / 8);
_writeData(xe / 8);
_writeCommand(0x45);
_writeData(ys % 256);
_writeData(ys / 256);
_writeData(ye % 256);
_writeData(ye / 256);
}
void GxEPD2_32_BW::_setRamPointer(uint16_t x, uint16_t y)
{
_writeCommand(0x4e);
_writeData(x / 8);
_writeCommand(0x4f);
_writeData(y % 256);
_writeData(y / 256);
}
void GxEPD2_32_BW::_setPartialRamArea(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
{
if (_panel == GxEPD2::GDEW027W3)
{
w = (w + 7 + (x % 8)) & 0xfff8; // byte boundary exclusive (round up)
_writeCommand(0x15);
_writeData(x >> 8);
_writeData(x & 0xf8);
_writeData(y >> 8);
_writeData(y & 0xff);
_writeData(w >> 8);
_writeData(w & 0xf8);
_writeData(h >> 8);
_writeData(h & 0xff);
}
else
{
uint16_t xe = (x + w - 1) | 0x0007; // byte boundary inclusive (last byte)
x &= 0xFFF8; // byte boundary
uint16_t ye = y + h - 1;
_writeCommand(0x90); // partial window
_writeData(x / 256);
_writeData(x % 256);
_writeData(xe / 256);
_writeData(xe % 256);
_writeData(y / 256);
_writeData(y % 256);
_writeData(ye / 256);
_writeData(ye % 256);
_writeData(0x01); // don't see any difference
//_writeData(0x00); // don't see any difference
}
}
void GxEPD2_32_BW::_refreshWindow(uint16_t x, uint16_t y, uint16_t w, uint16_t h)
{
w = (w + 7 + (x % 8)) & 0xfff8; // byte boundary exclusive (round up)
h = gx_uint16_min(h, 256); // strange controller error
_writeCommand(0x16);
_writeData(x >> 8);
_writeData(x & 0xf8);
_writeData(y >> 8);
_writeData(y & 0xff);
_writeData(w >> 8);
_writeData(w & 0xf8);
_writeData(h >> 8);
_writeData(h & 0xff);