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//! Draw a 1 bit per pixel black and white image. On a 128x64 sh1106 display over I2C.
//!
//! Image was created with ImageMagick:
//!
//! ```bash
//! convert rust.png -depth 1 gray:rust.raw
//! ```
//!
//! This example is for the STM32F103 "Blue Pill" board using I2C1.
//!
//! Wiring connections are as follows for a CRIUS-branded display:
//!
//! ```
//! Display -> Blue Pill
//! (black) GND -> GND
//! (red) +5V -> VCC
//! (yellow) SDA -> PB9
//! (green) SCL -> PB8
//! ```
//!
//! Run on a Blue Pill with `cargo run --example image`.
#![no_std]
#![no_main]
use cortex_m_rt::{entry, exception, ExceptionFrame};
use embedded_graphics::{
image::{Image, ImageRawLE},
pixelcolor::BinaryColor,
prelude::*,
};
use panic_semihosting as _;
use sh1106::{prelude::*, Builder};
use stm32f1xx_hal::{
i2c::{BlockingI2c, DutyCycle, Mode},
prelude::*,
stm32,
};
#[entry]
fn main() -> ! {
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 gpiob = dp.GPIOB.split(&mut rcc.apb2);
let scl = gpiob.pb8.into_alternate_open_drain(&mut gpiob.crh);
let sda = gpiob.pb9.into_alternate_open_drain(&mut gpiob.crh);
let i2c = BlockingI2c::i2c1(
dp.I2C1,
(scl, sda),
&mut afio.mapr,
Mode::Fast {
frequency: 100.khz().into(),
duty_cycle: DutyCycle::Ratio2to1,
},
clocks,
&mut rcc.apb1,
1000,
10,
1000,
1000,
);
let mut display: GraphicsMode<_> = Builder::new().connect_i2c(i2c).into();
display.init().unwrap();
display.flush().unwrap();
let im: ImageRawLE<BinaryColor> = ImageRawLE::new(include_bytes!("./rust.raw"), 64);
Image::new(&im, Point::new(32, 0))
.draw(&mut display)
.unwrap();
display.flush().unwrap();
loop {}
}
#[exception]
fn HardFault(ef: &ExceptionFrame) -> ! {
panic!("{:#?}", ef);
}