eink-waveshare-rs

This library contains a driver for the 4.2 Inch E-Paper Module from Waveshare.

Support for more (especially the smaller and faster ones) should follow after the library around the 4.2" EInk is stable and tested enough.

(Supported) Devices

| Device (with Link) | Colors | Flexible | Partial Refresh | Supported | Tested | | :---: | --- | :---: | :---: | :---: | | 4.2 Inch B/W (A) | Black, White | ✕ | Not officially [1] | ✔ | ✔ | | 1.54 Inch B/W (A) | Black, White | ✕ | ✔ | | | | 2.13 Inch B/W (A) | Black, White | ✕ | ✔ | | | | 2.9 Inch B/W (A) | Black, White | ✕ | ✔ | ✔ | |

4.2 Inch E-Ink Black/White

Out of the Box the original driver from Waveshare only supports full updates.

• [1]: Be careful with the quick refresh updates:
  It's possible with this driver but might lead to ghosting / burn-in effects therefore it's hidden behind a feature.

Interface

Interface	Description
VCC	3.3V
GND	GND
DIN	SPI MOSI
CLK	SPI SCK
CS	SPI chip select (Low active)
DC	Data/Command control pin (High for data, and low for command)
RST	External reset pin (Low for reset)
BUSY	Busy state output pin (Low for busy)

TODO's

• add more examples (e.g. for f3)
• improve the partial drawing/check the timings/timing improvements/....
• for later: add support for the smaller waveshare epds
• License: Stay with ISC (=MIT) or go to the Apache+MIT Dual License as used in many other projects?

Graphics/Drawing

Supports:

• Lines
• Squares
• Circles
• Pixels
• Chars
• Strings

Chars and Strings work with a 8x8-Font.

Support for bigger sized/independent Fonts is in work.

Examples

There is an example for Raspberry Pi in the example folder.