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Christoph Groß 7fa1a27f40 Shortened TypeDefinitions, 
made init a private function,
added a crate internal extended waveshareinterface,
added a combined  Connection_interface::data_and_command function,
added a wake_up function,
added a updated_and_display_partial_frame_function
 		5 years ago
ci added ci 5 years ago
examples/embedded_linux_epd4in2 Renamed example to embedded_linux_epd4in2 instead of embedded_linux to make the display which is used in this example more explicit 5 years ago
src Shortened TypeDefinitions, 5 years ago
.gitignore some changes 5 years ago
.travis.yml Renamed example to embedded_linux_epd4in2 instead of embedded_linux to make the display which is used in this example more explicit 5 years ago
Cargo.toml added feature gates for the different displays 5 years ago
License.md Create License.md 5 years ago
README.md Not all Type A screens are completly the same to the change to bring it all together was reverted. 5 years ago

README.md

eink-waveshare-rs Build Status

This library contains a driver for E-Paper Modules from Waveshare.

Support for more than the 4.2in EPD (especially the smaller and faster ones) is in the work.

The 2.9in (A) and 1.54 (A) variant should both work but aren't tested yet.

(Supported) Devices

Device (with Link) Colors Flexible Display 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)

Display Configs

There are two types of Display Configurations used in Wavedshare EPDs, which also needs to be set on the "new" E-Paper Driver HAT. They are also called A and B, but you shouldn't get confused and mix it with the Type A,B,C and D of the various Displays, which just describe different types (colored variants) or new versions. In the Display Config the seperation is most likely due to included fast partial refresh of the displays. In a Tabular form:

Type A Tybe B
1.54in (A) 1.54in (B)
2.13in (A) 1.54in (C)
2.13in (D) 2.13in (B)
2.9in (A) 2.13in (C)
2.7in (A)
2.7in (B)
2.9in (B)
2.9in (C)
4.2in (A)
4.2in (B)
4.2in (C)
7.5in (A)
7.5in (B)
7.5in (C)

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.