SSD1331 driver

SPI (4 wire) driver for the SSD1331 OLED display.

The display is configured by this driver to use a 16 bit, R5 G6 B5 pixel definition. You can convert images into the correct BMP format with the following commands:

bash convert my_image.png -flip -type truecolor -define bmp:subtype=RGB565 -depth 16 -strip my_image.bmp

You can also export images directly from The GIMP by saving as .bmp and choosing the following option:

Documentation

Examples

Load a BMP image of the Rust logo and display it in the center of the display. From examples/bmp.rs:

```rust

![no_std]

![no_main]

use cortexmrt::ExceptionFrame; use cortexmrt::{entry, exception}; use embeddedgraphics::{geometry::Point, image::ImageBmp, prelude::*}; use panicsemihosting as ; use ssd1331::{Ssd1331, DisplayRotation::Rotate0}; use stm32f1xxhal::delay::Delay; use stm32f1xxhal::prelude::*; use stm32f1xxhal::spi::{Mode, Phase, Polarity, Spi}; use stm32f1xx_hal::stm32;

[entry]

fn main() -> ! { let cp = cortex_m::Peripherals::take().unwrap(); let dp = stm32::Peripherals::take().unwrap(); let mut flash = dp.FLASH.constrain(); let mut rcc = dp.RCC.constrain(); let clocks = rcc.cfgr.freeze(&mut flash.acr); let mut afio = dp.AFIO.constrain(&mut rcc.apb2); let mut gpioa = dp.GPIOA.split(&mut rcc.apb2); let mut gpiob = dp.GPIOB.split(&mut rcc.apb2);

// SPI1
let sck = gpioa.pa5.into_alternate_push_pull(&mut gpioa.crl);
let miso = gpioa.pa6;
let mosi = gpioa.pa7.into_alternate_push_pull(&mut gpioa.crl);
let mut delay = Delay::new(cp.SYST, clocks);
let mut rst = gpiob.pb0.into_push_pull_output(&mut gpiob.crl);
let dc = gpiob.pb1.into_push_pull_output(&mut gpiob.crl);

let spi = Spi::spi1(
    dp.SPI1,
    (sck, miso, mosi),
    &mut afio.mapr,
    Mode {
        polarity: Polarity::IdleLow,
        phase: Phase::CaptureOnFirstTransition,
    },
    8.mhz(),
    clocks,
    &mut rcc.apb2,
);

let mut disp = Ssd1331::new(spi, dc, DisplayRotation::Rotate0);

disp.reset(&mut rst, &mut delay).unwrap();
disp.init().unwrap();
disp.flush().unwrap();

let (w, h) = disp.dimensions();

let im = ImageBmp::new(include_bytes!("./rust-pride.bmp")).unwrap();

// Position image in the center of the display
let moved = im.translate(Point::new(
    (w as u32 - im.width()) as i32 / 2,
    (h as u32 - im.height()) as i32 / 2,
));

disp.draw(moved.into_iter());

disp.flush().unwrap();

loop {}

}

[exception]

fn HardFault(ef: &ExceptionFrame) -> ! { panic!("{:#?}", ef); } ```

Migrating from 0.1 to 0.2

The full changelog can be found here. A tl;dr version is shown below.

Version 0.1.x

```rust use ssd1331::{prelude::*, Builder};

let mut disp: GraphicsMode<_> = Builder::new().connect_spi(spi, dc).into();

disp.reset(&mut rst, &mut delay); disp.init().unwrap(); disp.flush().unwrap();

disp.getdimensions(); disp.getrotation(); ```

Version 0.2.x

```rust use ssd1331::{Ssd1331, DisplayRotation};

let mut disp = Ssd1331::new(spi, dc, DisplayRotation::Rotate0);

disp.reset(&mut rst, &mut delay).unwrap(); disp.init().unwrap(); disp.flush().unwrap();

disp.dimensions(); disp.rotation(); ```

License

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.