gdew0583z21 600x448 B|R - martinberlin/cale-idf GitHub Wiki
- Size: 600 * 448 Colors: B/W/RED
- Manufacturer: Good display
- Inches: 5.83
- Controller: IL0371
- Status: Implemented. Tests passed (merged in master)
- Partial update: Not supported by the controller (Most color epapers do not support partial refresh)
Statistics in milliseconds with SPI clocked at 4 Mhz and ESP32 at max CPU speed:
2334 _wakeUp settings+send Buffer
2003 update
4338 total time in millis
Takes less than 3 seconds to send the data and 2 seconds more waiting for BUSY till the update is released. This display uses a special function that is called _send8pixel and per SPI IO.data(2 pixels per byte) in 4 rounds per byte which makes this class a bit slower than the others.
A byte in the Pixel buffer looks like
Each pixel has 4 bits. A transaction sends one byte with 2 pixels at a time until reaches the end of the buffer. Note that small ¹ is used only to mark where each pixel starts.
Ex1: Two white pixels
|¹ 0|² 0| 1 | 1|¹ 0|² 0| 1 | 1|
0x03 | 0x03 2 white pixels will set this byte to 0x33
00110011 Byte (51 in decimal)
Ex2: Two red pixels
|¹ 0|² 1| 0 | 0|¹ 0|² 1| 0 | 0|
0x04 | 0x04 2 red pixels will set this byte to 0x44
01000100 Byte (68)
Ex3: One white and a second red pixel
|¹ 0|² 0| 1 | 1|¹ 0|² 1| 0 | 0|
0x03 | 0x04 will set the byte to 0x34
00110100 Byte (52)
Color index:
0x00 Black
0x03 White
0x04 Red
To test it, in your C++ example of choice:
#include <gdew0583z21.h>
#include <Fonts/FreeSerif12pt7b.h> // Optionally include a font from Adafruit GFX
EpdSpi io;
Gdew0583z21 display(io);
void app_main(void)
{
display.init(true); // Activate debug
display.setRotation(0); // Optionally change rotation
display.setTextColor(EPD_RED);
// Draw a line of 2 pix height
for (int i = 0; i < display.width(); i++) {
display.drawPixel(i,10,EPD_BLACK);
display.drawPixel(i,11,EPD_BLACK);
}
// Write something
display.setCursor(10,100);
display.setFont(&FreeSerif12pt7b);
display.println("CalEPD the epaper component you can trust");
// Type display.* to discover more of the inherited GFX functions fillCircle, fillTriangle, etc
}
Preview of housing 3D printed for this display
