swaitsandClaude Opus 4.6
3102fc747a
Implement full SSD1306 OLED display support: - Splash screen on boot (1.5s) with project name, version, board - Dashboard showing radio state, config, counters, RSSI/SNR - RSSI history sparkline (64-sample ring buffer, 2px-wide bars) - DisplayOn/DisplayOff host commands routed via dedicated channel - Pure render functions against generic DrawTarget (no hardware coupling) - Display on/off control bypasses radio task entirely Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
87 lines
2.5 KiB
Rust
87 lines
2.5 KiB
Rust
//! Draw an RGB565 BMP image onto the display by converting the `Rgb565` pixel color type to
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//! `BinaryColor` using a simple threshold where any pixel with a value greater than zero is treated
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//! as "on".
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//!
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//! Note that the `bmp` feature for `embedded-graphics` must be turned on.
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//!
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//! This example is for the STM32F103 "Blue Pill" board using I2C1.
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//!
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//! Wiring connections are as follows for a CRIUS-branded display:
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//!
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//! ```
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//! Display -> Blue Pill
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//! (black) GND -> GND
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//! (red) +5V -> VCC
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//! (yellow) SDA -> PB7
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//! (green) SCL -> PB6
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//! ```
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//!
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//! Run on a Blue Pill with `cargo run --example image_i2c`.
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#![no_std]
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#![no_main]
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use cortex_m::asm::nop;
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use cortex_m_rt::entry;
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use defmt_rtt as _;
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use embassy_stm32::time::Hertz;
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#[cfg(feature = "async")]
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use embassy_stm32::{bind_interrupts, i2c, peripherals};
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use embedded_graphics::{image::Image, pixelcolor::Rgb565, prelude::*};
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use panic_probe as _;
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use ssd1306::{prelude::*, I2CDisplayInterface, Ssd1306};
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use tinybmp::Bmp;
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#[entry]
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fn main() -> ! {
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let p: embassy_stm32::Peripherals = embassy_stm32::init(Default::default());
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#[cfg(feature = "async")]
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bind_interrupts!(struct Irqs {
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I2C1_EV => i2c::EventInterruptHandler<peripherals::I2C1>;
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I2C1_ER => i2c::ErrorInterruptHandler<peripherals::I2C1>;
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});
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#[cfg(feature = "async")]
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let i2c = embassy_stm32::i2c::I2c::new(
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p.I2C1,
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p.PB6,
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p.PB7,
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Irqs,
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p.DMA1_CH6,
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p.DMA1_CH7,
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Hertz::khz(400),
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Default::default(),
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);
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#[cfg(not(feature = "async"))]
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let i2c = embassy_stm32::i2c::I2c::new_blocking(
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p.I2C1,
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p.PB6,
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p.PB7,
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Hertz::khz(400),
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Default::default(),
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);
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let interface = I2CDisplayInterface::new(i2c);
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let mut display = Ssd1306::new(interface, DisplaySize128x64, DisplayRotation::Rotate0)
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.into_buffered_graphics_mode();
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display.init().unwrap();
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let bmp = Bmp::from_slice(include_bytes!("./rust.bmp")).expect("Failed to load BMP image");
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// The image is an RGB565 encoded BMP, so specifying the type as `Image<Bmp<Rgb565>>` will read
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// the pixels correctly
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let im: Image<Bmp<Rgb565>> = Image::new(&bmp, Point::new(32, 0));
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// We use the `color_converted` method here to automatically convert the RGB565 image data into
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// BinaryColor values.
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im.draw(&mut display.color_converted()).unwrap();
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display.flush().unwrap();
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loop {
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nop()
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}
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}
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