7.3 inch e-paper display 7-color GDEY073D46 on CALE-IDF successfully driven, ideal for nice photo-portrait, support Floyd-Steinberg dithering render colorful image

Cale-IDF by Martin Fasani (Fasani Corp)

https://github.com/martinberlin/cale-idf/wiki/Model-7-color-gdey073d46.h

Demo available in this repository

cale-7-color.cpp -> CALE.es allows you to add 800*480 screens and output and download WiFi images using 4 or 24 bit depth BMP.

WiFi configuration and BMP need to be set using CALE URL before use (idf.py menuconfig)

demo-7-colors.cpp prints some random colored rectangles and some text

Statistics

STATS (ms)

4358 _wakeUp settings+send Buffer

2027 _powerOn

6385 total time in millis

Drawing

This e-paper is great for color digital signage in stores, but 7 colors are not suitable for rendering full-quality photos.

Still, they'll make photo portraits that are good enough and stunning for color-limited digital photo frames, if paired with some dithering algorithms.

We recommend using CALE.es as it includes various dithering options using Image Magick! ! ! !

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Demo example

#include <gdey073d46.h>
EpdSpi io;
gdey073d46 display(io);

uint16_t randomColor() {
  srand(esp_timer_get_time());
  uint8_t random = rand()%5;
  uint16_t color = 0x33;
  switch (random)
  {
  case 0:
     color = EPD_GREEN;
     break;
  
  case 1:
     color = EPD_RED;
     break;
  case 2:
     color = EPD_ORANGE;
     break;
  case 3:
     color = EPD_YELLOW;
     break;
  case 4:
     color = EPD_BLUE;
     break;
  case 5:
     color = EPD_BLACK;
     break;
  }
  return color;
}

void app_main() {
   // Test Epd class. true to enable debug
   display.init(false);
   display.fillScreen(randomColor());
   display.update();
}