Add support for GDEH0154D67 (aka epd1in54_v2)

[jcard0na]

The main changes from the previous version of the display, are the
lookup tables and the initialization procedures. Also, partial vs. full
updates have a slightly different logic.

The changes were mostly ported from the vendor driver (EPAPER.c) as well
as Waveshare example driver (EPD_1in54_V2.cpp). Both drivers are
released under public "use at will" license.

This was tested as:

use epd_waveshare::{epd1in54_v2::*, prelude::*};

let mut epd = Epd1in54::new(&mut spi, cs_pin, busy_in, dc, rst, &mut delay)?;

epd.set_lut(&mut spi, Some(RefreshLut::Full))?;
epd.clear_frame(&mut spi, &mut delay)?;
epd.display_frame(&mut spi, &mut delay)?;

// display cleared, yay!

let mut display = Display1in54::default();

let bmp: Bmp<BinaryColor> = Bmp::from_slice(light_data)?;
let image = Image::new(&bmp, Point::zero());
image.draw(&mut display)?;

epd.set_lut(&mut spi, Some(RefreshLut::Quick))?;
epd.update_frame(&mut spi, &display.buffer(), &mut delay)?;
epd.display_frame(&mut spi, &mut delay)?;

// display shows image

#102 #79

[jcard0na]

Question to the maintainer regarding this patch:

The file graphics.rs in this PR is an unmodified copy of the one in epd1in54. I would be inclined to just link to that one instead, to avoid code duplication and ensure that future fixes and additions are applied to both displays. What do you think?

[caemor]

Question to the maintainer regarding this patch:

The file graphics.rs in this PR is an unmodified copy of the one in epd1in54. I would be inclined to just link to that one instead, to avoid code duplication and ensure that future fixes and additions are applied to both displays. What do you think?

Yes this sounds good, if they behave the same way.

[caemor]

Thanks for the PR.
It nearly looks ready to merge besides the move of the graphics file and the LUTs.

[jcard0na]

I believe I addressed all the change requests. Let me know if there's anything else that should be addressed before merging.

[caemor]

I think the new constants/LUTs file might be missing

[jcard0na]

Duh! Sorry about that. Just added it.

[caemor]

Duh! Sorry about that. Just added it.

Thanks. Now I believe it just needs the cargo fmt once more.

[caemor]

Thanks for your work 🥳

[lf94]

:o!!! Awesome work! Thank you!