Crate epd_waveshare

A simple Driver for the Waveshare E-Ink Displays via SPI

• Built using embedded-hal traits.
• Graphics support is added through embedded-graphics

Example

use embedded_graphics::{
    pixelcolor::BinaryColor::On as Black, prelude::*, primitives::Line, style::PrimitiveStyle,
};
use epd_waveshare::{epd1in54::*, prelude::*};

// Setup EPD
let mut epd = EPD1in54::new(&mut spi, cs_pin, busy_in, dc, rst, &mut delay)?;

// Use display graphics from embedded-graphics
let mut display = Display1in54::default();

// Use embedded graphics for drawing a line
let _ = Line::new(Point::new(0, 120), Point::new(0, 295))
    .into_styled(PrimitiveStyle::with_stroke(Black, 1))
    .draw(&mut display);

    // Display updated frame
epd.update_frame(&mut spi, &display.buffer())?;
epd.display_frame(&mut spi)?;

// Set the EPD to sleep
epd.sleep(&mut spi)?;

Other information and requirements

• Buffersize: Wherever a buffer is used it always needs to be of the size: width / 8 * length, where width and length being either the full e-ink size or the partial update window size

SPI

MISO is not connected/available. SPI_MODE_0 is used (CPHL = 0, CPOL = 0) with 8 bits per word, MSB first.

Maximum speed tested by myself was 8Mhz but more should be possible (Ben Krasnow used 18Mhz with his implemenation)

Modules

color	B/W Color for EPDs
epd1in54	A simple Driver for the Waveshare 1.54" E-Ink Display via SPI
epd1in54b	A simple Driver for the Waveshare 1.54" (B) E-Ink Display via SPI
epd2in9	A simple Driver for the Waveshare 2.9" E-Ink Display via SPI
epd2in9bc	A simple Driver for the Waveshare 2.9" (B/C) E-Ink Display via SPI
epd4in2	A simple Driver for the Waveshare 4.2" E-Ink Display via SPI
epd7in5	A simple Driver for the Waveshare 7.5" E-Ink Display via SPI
epd7in5_v2	A simple Driver for the Waveshare 7.5" E-Ink Display (V2) via SPI
graphics	Graphics Support for EPDs
prelude	Includes everything important besides the chosen Display

Constants

SPI_MODE

SPI mode - For more infos see Requirements: SPI